espresso_node/

api.rs

use std::{collections::HashMap, pin::Pin, sync::Arc, time::Duration};

use ::light_client::{
    LightClient,
    client::{FallbackClient, QueryServiceClient},
    state::{Genesis, LightClientOptions},
    storage::{LightClientSqliteOptions, SqliteStorage},
};
use alloy::primitives::U256;
use anyhow::{Context, bail, ensure};
use async_lock::RwLock;
use async_once_cell::Lazy;
use async_trait::async_trait;
use committable::Commitment;
use data_source::{
    CatchupDataSource, RequestResponseDataSource, StakeTableDataSource, StakeTableWithEpochNumber,
    StateCertDataSource, StateCertFetchingDataSource, SubmitDataSource,
};
use derivative::Derivative;
use espresso_types::{
    AccountQueryData, AuthenticatedValidatorMap, BlockMerkleTree, FeeAccount, FeeMerkleTree, Leaf2,
    NodeState, PubKey, Transaction,
    config::PublicNetworkConfig,
    retain_accounts,
    traits::EventsPersistenceRead,
    v0::traits::{SequencerPersistence, StateCatchup},
    v0_3::{
        ChainConfig, RegisteredValidator, RewardAccountQueryDataV1, RewardAccountV1, RewardAmount,
        RewardMerkleTreeV1, StakeTableEvent,
    },
    v0_4::{
        PermittedRewardMerkleTreeV2, RewardAccountQueryDataV2, RewardAccountV2, RewardMerkleTreeV2,
    },
};
use futures::{
    future::{BoxFuture, Future, FutureExt},
    stream::BoxStream,
};
use hotshot_contract_adapter::sol_types::EspToken;
use hotshot_events_service::events_source::{
    EventFilterSet, EventsSource, EventsStreamer, StartupInfo,
};
use hotshot_query_service::{
    availability::VidCommonQueryData,
    data_source::ExtensibleDataSource,
    fetching::{self, Provider},
};
use hotshot_types::{
    PeerConfig,
    data::{EpochNumber, VidCommitment, VidCommon, VidShare, ViewNumber},
    event::{Event, LegacyEvent},
    light_client::LCV3StateSignatureRequestBody,
    network::NetworkConfig,
    simple_certificate::LightClientStateUpdateCertificateV2,
    stake_table::HSStakeTable,
    traits::{
        election::{Membership, MembershipSnapshot, NonEpochMembershipSnapshot},
        network::ConnectedNetwork,
    },
    utils::epoch_from_block_number,
    vid::avidm::{AvidMScheme, init_avidm_param},
    vote::HasViewNumber,
};
use itertools::Itertools;
use jf_merkle_tree_compat::MerkleTreeScheme;
use moka::future::Cache;
use rand::Rng;
use request_response::RequestType;
use serde::{Deserialize, Serialize};
use tokio::time::timeout;
use url::Url;
use vbs::version::Version;

use self::data_source::{HotShotConfigDataSource, NodeStateDataSource, StateSignatureDataSource};
use crate::{
    SeqTypes, SequencerApiVersion, SequencerContext,
    api::data_source::TokenDataSource,
    catchup::{
        CatchupStorage, add_fee_accounts_to_state, add_v1_reward_accounts_to_state,
        add_v2_reward_accounts_to_state,
    },
    consensus_handle::ConsensusHandle,
    context::ConsensusNode,
    request_response::{
        data_source::{retain_v1_reward_accounts, retain_v2_reward_accounts},
        request::{Request, Response},
    },
    state_cert::{StateCertFetchError, validate_state_cert},
    state_signature::StateSigner,
};

pub mod data_source;
pub mod endpoints;
pub mod fs;
pub mod light_client;
pub mod options;
pub mod sql;
pub mod state;
pub mod unlock_schedule;
mod update;

pub use options::Options;

pub type BlocksFrontier = <BlockMerkleTree as MerkleTreeScheme>::MembershipProof;

type BoxLazy<T> = Pin<Arc<Lazy<T, BoxFuture<'static, T>>>>;

#[derive(Derivative)]
#[derivative(Clone(bound = ""), Debug(bound = ""))]
struct ApiState<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> {
    // The consensus state is initialized lazily so we can start the API (and healthcheck endpoints)
    // before consensus has started. Any endpoint that uses consensus state will wait for
    // initialization to finish, but endpoints that do not require a consensus handle can proceed
    // without waiting.
    #[derivative(Debug = "ignore")]
    sequencer_context: BoxLazy<SequencerContext<N, P>>,

    // we cache `token_supply` for up to an hour, to avoid repeatedly querying the contract for information that rarely changes
    token_supply: Cache<(), U256>,
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> ApiState<N, P> {
    fn new(context_init: impl Future<Output = SequencerContext<N, P>> + Send + 'static) -> Self {
        Self {
            sequencer_context: Arc::pin(Lazy::from_future(context_init.boxed())),
            token_supply: Cache::builder()
                .max_capacity(1)
                .time_to_live(Duration::from_secs(3600))
                .build(),
        }
    }

    async fn state_signer(&self) -> Arc<RwLock<StateSigner<SequencerApiVersion>>> {
        self.sequencer_context
            .as_ref()
            .get()
            .await
            .get_ref()
            .state_signer()
    }

    async fn event_streamer(&self) -> Arc<RwLock<EventsStreamer<SeqTypes>>> {
        self.sequencer_context
            .as_ref()
            .get()
            .await
            .get_ref()
            .event_streamer()
    }

    async fn consensus_handle(&self) -> Arc<ConsensusHandle<SeqTypes, ConsensusNode<N, P>>> {
        self.sequencer_context
            .as_ref()
            .get()
            .await
            .get_ref()
            .consensus_handle()
    }

    async fn network_config(&self) -> NetworkConfig<SeqTypes> {
        self.sequencer_context
            .as_ref()
            .get()
            .await
            .get_ref()
            .network_config()
    }
}

type StorageState<N, P, D> = ExtensibleDataSource<D, ApiState<N, P>>;

#[async_trait]
impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> EventsSource<SeqTypes>
    for ApiState<N, P>
{
    type EventStream = BoxStream<'static, Arc<Event<SeqTypes>>>;
    type LegacyEventStream = BoxStream<'static, Arc<LegacyEvent<SeqTypes>>>;

    async fn get_event_stream(
        &self,
        _filter: Option<EventFilterSet<SeqTypes>>,
    ) -> Self::EventStream {
        self.event_streamer()
            .await
            .read()
            .await
            .get_event_stream(None)
            .await
    }

    async fn get_legacy_event_stream(
        &self,
        _filter: Option<EventFilterSet<SeqTypes>>,
    ) -> Self::LegacyEventStream {
        self.event_streamer()
            .await
            .read()
            .await
            .get_legacy_event_stream(None)
            .await
    }

    async fn get_startup_info(&self) -> StartupInfo<SeqTypes> {
        self.event_streamer()
            .await
            .read()
            .await
            .get_startup_info()
            .await
    }
}

impl<N: ConnectedNetwork<PubKey>, D: Send + Sync, P: SequencerPersistence> TokenDataSource<SeqTypes>
    for StorageState<N, P, D>
{
    async fn get_initial_supply_l1(&self) -> anyhow::Result<U256> {
        self.as_ref().get_initial_supply_l1().await
    }

    async fn get_total_supply_l1(&self) -> anyhow::Result<U256> {
        self.as_ref().get_total_supply_l1().await
    }

    async fn get_decided_header(&self) -> espresso_types::Header {
        self.as_ref().get_decided_header().await
    }
}

impl<N: ConnectedNetwork<PubKey>, D: Send + Sync, P: SequencerPersistence> SubmitDataSource<N, P>
    for StorageState<N, P, D>
{
    async fn submit(&self, tx: Transaction) -> anyhow::Result<()> {
        self.as_ref().submit(tx).await
    }
}

impl<N: ConnectedNetwork<PubKey>, D: Sync, P: SequencerPersistence> StakeTableDataSource<SeqTypes>
    for StorageState<N, P, D>
{
    /// Get the stake table for a given epoch
    async fn get_stake_table(
        &self,
        epoch: Option<EpochNumber>,
    ) -> anyhow::Result<Vec<PeerConfig<SeqTypes>>> {
        self.as_ref().get_stake_table(epoch).await
    }

    /// Get the stake table for the current epoch if not provided
    async fn get_stake_table_current(&self) -> anyhow::Result<StakeTableWithEpochNumber<SeqTypes>> {
        self.as_ref().get_stake_table_current().await
    }

    /// Get the DA stake table for a given epoch
    async fn get_da_stake_table(
        &self,
        epoch: Option<EpochNumber>,
    ) -> anyhow::Result<Vec<PeerConfig<SeqTypes>>> {
        self.as_ref().get_da_stake_table(epoch).await
    }

    /// Get the DA stake table for the current epoch if not provided
    async fn get_da_stake_table_current(
        &self,
    ) -> anyhow::Result<StakeTableWithEpochNumber<SeqTypes>> {
        self.as_ref().get_da_stake_table_current().await
    }

    /// Get all the validators
    async fn get_validators(
        &self,
        epoch: EpochNumber,
    ) -> anyhow::Result<AuthenticatedValidatorMap> {
        self.as_ref().get_validators(epoch).await
    }

    async fn get_block_reward(
        &self,
        epoch: Option<EpochNumber>,
    ) -> anyhow::Result<Option<RewardAmount>> {
        self.as_ref().get_block_reward(epoch).await
    }
    /// Get all the validator participation for the current epoch
    async fn current_proposal_participation(&self) -> HashMap<PubKey, f64> {
        self.as_ref().current_proposal_participation().await
    }
    /// Get all the validator participation for the previous epoch
    async fn proposal_participation(&self, epoch: EpochNumber) -> HashMap<PubKey, f64> {
        self.as_ref().proposal_participation(epoch).await
    }
    /// Get all the vote participation for the current epoch
    async fn current_vote_participation(&self) -> HashMap<PubKey, f64> {
        self.as_ref().current_vote_participation().await
    }
    /// Get all the vote participation for a given epoch
    async fn vote_participation(&self, epoch: EpochNumber) -> HashMap<PubKey, f64> {
        self.as_ref().vote_participation(epoch).await
    }

    async fn get_all_validators(
        &self,
        epoch: EpochNumber,
        offset: u64,
        limit: u64,
    ) -> anyhow::Result<Vec<RegisteredValidator<PubKey>>> {
        self.as_ref().get_all_validators(epoch, offset, limit).await
    }

    async fn stake_table_events(
        &self,
        from_l1_block: u64,
        to_l1_block: u64,
    ) -> anyhow::Result<Vec<StakeTableEvent>> {
        self.as_ref()
            .stake_table_events(from_l1_block, to_l1_block)
            .await
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> TokenDataSource<SeqTypes>
    for ApiState<N, P>
{
    async fn get_initial_supply_l1(&self) -> anyhow::Result<U256> {
        let node_state = self.sequencer_context.as_ref().get().await.node_state();
        let fetcher = node_state.coordinator.membership().fetcher().clone();
        let cached = *fetcher.initial_supply.read().await;
        match cached {
            Some(supply) => Ok(supply),
            None => Ok(fetcher.fetch_and_update_initial_supply().await?),
        }
    }

    async fn get_total_supply_l1(&self) -> anyhow::Result<U256> {
        match self.token_supply.get(&()).await {
            Some(supply) => Ok(supply),
            None => {
                let node_state = self.sequencer_context.as_ref().get().await.node_state();
                let token_contract_address = node_state.token_contract_address().await?;

                let provider = node_state.l1_client.provider;

                let token = EspToken::new(token_contract_address, provider.clone());

                let supply = token
                    .totalSupply()
                    .call()
                    .await
                    .context("Failed to retrieve totalSupply from the contract")?;

                self.token_supply.insert((), supply).await;

                Ok(supply)
            },
        }
    }

    async fn get_decided_header(&self) -> espresso_types::Header {
        self.consensus_handle()
            .await
            .decided_leaf()
            .await
            .block_header()
            .clone()
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> StakeTableDataSource<SeqTypes>
    for ApiState<N, P>
{
    /// Get the stake table for a given epoch
    async fn get_stake_table(
        &self,
        epoch: Option<EpochNumber>,
    ) -> anyhow::Result<Vec<PeerConfig<SeqTypes>>> {
        let handle = self.consensus_handle().await;
        if let Some(requested) = epoch {
            let first_epoch = handle
                .membership_coordinator()
                .await
                .membership()
                .first_epoch();
            if let Some(first_epoch) = first_epoch
                && requested < first_epoch
            {
                return Err(anyhow::anyhow!(
                    "requested stake table for epoch {requested:?} is below the first epoch \
                     {first_epoch:?}"
                ));
            }
        }
        let highest_epoch = handle.current_epoch().await.map(|e| e + 1);
        if epoch > highest_epoch {
            return Err(anyhow::anyhow!(
                "requested stake table for epoch {epoch:?} is beyond the current epoch + 1 \
                 {highest_epoch:?}"
            ));
        }
        let mem = handle
            .membership_coordinator()
            .await
            .stake_table_for_epoch(epoch)?;

        Ok(mem.stake_table().cloned().collect())
    }

    /// Get the stake table for the current epoch and return it along with the epoch number
    async fn get_stake_table_current(&self) -> anyhow::Result<StakeTableWithEpochNumber<SeqTypes>> {
        let epoch = self.consensus_handle().await.current_epoch().await;

        Ok(StakeTableWithEpochNumber {
            epoch,
            stake_table: self.get_stake_table(epoch).await?,
        })
    }

    /// Get the DA stake table for a given epoch
    async fn get_da_stake_table(
        &self,
        epoch: Option<EpochNumber>,
    ) -> anyhow::Result<Vec<PeerConfig<SeqTypes>>> {
        let coordinator = self.consensus_handle().await.membership_coordinator().await;
        Ok(match epoch {
            Some(e) => coordinator
                .membership()
                .snapshot(e)
                .map(|s| s.da_stake_table().cloned().collect())
                .unwrap_or_default(),
            None => coordinator
                .membership()
                .non_epoch_snapshot()
                .da_stake_table()
                .cloned()
                .collect(),
        })
    }

    /// Get the DA stake table for the current epoch and return it along with the epoch number
    async fn get_da_stake_table_current(
        &self,
    ) -> anyhow::Result<StakeTableWithEpochNumber<SeqTypes>> {
        let epoch = self.consensus_handle().await.current_epoch().await;

        Ok(StakeTableWithEpochNumber {
            epoch,
            stake_table: self.get_da_stake_table(epoch).await?,
        })
    }

    async fn get_block_reward(
        &self,
        epoch: Option<EpochNumber>,
    ) -> anyhow::Result<Option<RewardAmount>> {
        let coordinator = self.consensus_handle().await.membership_coordinator().await;

        let membership = coordinator.membership();
        let block_reward = match epoch {
            None => membership.fixed_block_reward(),
            Some(e) => membership.epoch_block_reward(e),
        };

        Ok(block_reward)
    }

    /// Get the whole validators map
    async fn get_validators(&self, e: EpochNumber) -> anyhow::Result<AuthenticatedValidatorMap> {
        Ok(self
            .consensus_handle()
            .await
            .membership_coordinator()
            .await
            .membership_for_epoch(Some(e))
            .context("membership not found")?
            .snapshot()
            .with_context(|| format!("no committee for epoch={e}"))?
            .validators()
            .clone())
    }

    /// Get the current proposal participation.
    async fn current_proposal_participation(&self) -> HashMap<PubKey, f64> {
        self.consensus_handle()
            .await
            .current_proposal_participation()
            .await
    }

    /// Get the proposal participation for a given epoch.
    async fn proposal_participation(&self, epoch: EpochNumber) -> HashMap<PubKey, f64> {
        self.consensus_handle()
            .await
            .proposal_participation(epoch)
            .await
    }

    /// Get the current vote participation.
    async fn current_vote_participation(&self) -> HashMap<PubKey, f64> {
        self.consensus_handle()
            .await
            .current_vote_participation()
            .await
    }

    /// Get the vote participation for a given epoch.
    async fn vote_participation(&self, epoch: EpochNumber) -> HashMap<PubKey, f64> {
        self.consensus_handle()
            .await
            .vote_participation(Some(epoch))
            .await
    }

    async fn get_all_validators(
        &self,
        epoch: EpochNumber,
        offset: u64,
        limit: u64,
    ) -> anyhow::Result<Vec<RegisteredValidator<PubKey>>> {
        let storage = self.consensus_handle().await.storage().await;
        storage.load_all_validators(epoch, offset, limit).await
    }

    async fn stake_table_events(
        &self,
        from_l1_block: u64,
        to_l1_block: u64,
    ) -> anyhow::Result<Vec<StakeTableEvent>> {
        let storage = self.consensus_handle().await.storage().await;
        let (status, events) = storage.load_events(from_l1_block, to_l1_block).await?;
        ensure!(
            status == Some(EventsPersistenceRead::Complete),
            "some events in range [{from_l1_block}, {to_l1_block}] are not available ({status:?})"
        );
        Ok(events.into_iter().map(|(_, event)| event).collect())
    }
}

impl<N: ConnectedNetwork<PubKey>, D: Sync, P: SequencerPersistence>
    RequestResponseDataSource<SeqTypes> for StorageState<N, P, D>
{
    async fn request_vid_shares(
        &self,
        block_number: u64,
        vid_common_data: VidCommonQueryData<SeqTypes>,
        timeout_duration: Duration,
    ) -> BoxFuture<'static, anyhow::Result<Vec<VidShare>>> {
        self.as_ref()
            .request_vid_shares(block_number, vid_common_data, timeout_duration)
            .await
    }
}

#[async_trait]
impl<N: ConnectedNetwork<PubKey>, D: Sync, P: SequencerPersistence>
    StateCertFetchingDataSource<SeqTypes> for StorageState<N, P, D>
{
    async fn request_state_cert(
        &self,
        epoch: u64,
        timeout: Duration,
    ) -> Result<LightClientStateUpdateCertificateV2<SeqTypes>, StateCertFetchError> {
        self.as_ref().request_state_cert(epoch, timeout).await
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> RequestResponseDataSource<SeqTypes>
    for ApiState<N, P>
{
    async fn request_vid_shares(
        &self,
        block_number: u64,
        vid_common_data: VidCommonQueryData<SeqTypes>,
        duration: Duration,
    ) -> BoxFuture<'static, anyhow::Result<Vec<VidShare>>> {
        // Get a handle to the request response protocol
        let request_response_protocol = self
            .sequencer_context
            .as_ref()
            .get()
            .await
            .request_response_protocol
            .clone();

        async move {
            // Get the total VID weight based on the VID common data
            let total_weight = match vid_common_data.common() {
                VidCommon::V0(_) => {
                    // TODO: This needs to be done via the stake table
                    return Err(anyhow::anyhow!(
                        "V0 total weight calculation not supported yet"
                    ));
                },
                VidCommon::V1(v1) => v1.total_weights,
                VidCommon::V2(v2) => v2.param.total_weights,
            };

            // Create the AvidM parameters from the total weight
            let avidm_param = init_avidm_param(total_weight)
                .with_context(|| "failed to initialize avidm param")?;

            // Get the payload hash for verification
            let VidCommitment::V1(local_payload_hash) = vid_common_data.payload_hash() else {
                bail!("V0 share verification not supported yet");
            };

            // Create a random request id
            let request_id = rand::thread_rng().r#gen();

            // Request and verify the shares from all other nodes, timing out after `duration` seconds
            let received_shares = Arc::new(parking_lot::Mutex::new(Vec::new()));
            let received_shares_clone = received_shares.clone();
            let request_result: anyhow::Result<_, _> = timeout(
                duration,
                request_response_protocol.request_indefinitely::<_, _, _>(
                    Request::VidShare(block_number, request_id),
                    RequestType::Broadcast,
                    move |_request, response| {
                        let avidm_param = avidm_param.clone();
                        let received_shares = received_shares_clone.clone();
                        async move {
                            // Make sure the response was a V1 share
                            let Response::VidShare(VidShare::V1(received_share)) = response else {
                                bail!("V0 share verification not supported yet");
                            };

                            // Verify the share
                            let Ok(Ok(_)) = AvidMScheme::verify_share(
                                &avidm_param,
                                &local_payload_hash,
                                &received_share,
                            ) else {
                                bail!("share verification failed");
                            };

                            // Add the share to the list of received shares
                            received_shares.lock().push(received_share);

                            bail!("waiting for more shares");

                            #[allow(unreachable_code)]
                            Ok(())
                        }
                    },
                ),
            )
            .await;

            // If the request timed out, return the shares we have collected so far
            match request_result {
                Err(_) => {
                    // If it timed out, this was successful. Return the shares we have collected so far
                    Ok(received_shares
                        .lock()
                        .clone()
                        .into_iter()
                        .map(VidShare::V1)
                        .collect())
                },

                // If it was an error from the inner request, return that error
                Ok(Err(e)) => Err(e).with_context(|| "failed to request vid shares"),

                // If it was successful, this was unexpected.
                Ok(Ok(_)) => bail!("this should not be possible"),
            }
        }
        .boxed()
    }
}

#[async_trait]
impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> StateCertFetchingDataSource<SeqTypes>
    for ApiState<N, P>
{
    async fn request_state_cert(
        &self,
        epoch: u64,
        timeout: Duration,
    ) -> Result<LightClientStateUpdateCertificateV2<SeqTypes>, StateCertFetchError> {
        tracing::info!("fetching state certificate for epoch={epoch}");
        let handle = self.consensus_handle().await;

        let current_epoch = handle.current_epoch().await;

        // The highest epoch we can have a state certificate for is current_epoch + 1
        // Check if requested epoch is beyond the highest possible epoch
        let highest_epoch = current_epoch.map(|e| e.u64() + 1);

        if Some(epoch) > highest_epoch {
            return Err(StateCertFetchError::Other(anyhow::anyhow!(
                "requested state certificate for epoch {epoch} is beyond the highest possible \
                 epoch {highest_epoch:?}"
            )));
        }

        // Get the stake table for validation
        let coordinator = handle.membership_coordinator().await;
        if let Err(err) = coordinator.stake_table_for_epoch(Some(EpochNumber::new(epoch))) {
            tracing::warn!(
                "Failed to get membership for epoch {epoch}: {err:#}. Waiting for catchup"
            );

            coordinator
                .wait_for_catchup(EpochNumber::new(epoch))
                .await
                .map_err(|e| {
                    StateCertFetchError::Other(
                        anyhow::Error::new(e)
                            .context(format!("failed to catch up for stake table epoch={epoch}")),
                    )
                })?;
        }

        let membership = coordinator
            .stake_table_for_epoch(Some(EpochNumber::new(epoch)))
            .map_err(|e| {
                StateCertFetchError::Other(
                    anyhow::Error::new(e)
                        .context(format!("failed to get stake table for epoch={epoch}")),
                )
            })?;

        let stake_table = HSStakeTable::from_iter(membership.stake_table());

        let state_catchup = self
            .sequencer_context
            .as_ref()
            .get()
            .await
            .node_state()
            .state_catchup
            .clone();

        let result = tokio::time::timeout(timeout, state_catchup.fetch_state_cert(epoch)).await;

        match result {
            Err(_) => Err(StateCertFetchError::FetchError(anyhow::anyhow!(
                "timeout while fetching state cert for epoch {epoch}"
            ))),
            Ok(Ok(cert)) => {
                // Validation errors should be mapped to ValidationError
                validate_state_cert(&cert, &stake_table).map_err(|e| {
                    StateCertFetchError::ValidationError(e.context(format!(
                        "state certificate validation failed for epoch={epoch}"
                    )))
                })?;

                tracing::info!("fetched and validated state certificate for epoch {epoch}");
                Ok(cert)
            },
            Ok(Err(e)) => Err(StateCertFetchError::FetchError(
                e.context(format!("failed to fetch state cert for epoch {epoch}")),
            )),
        }
    }
}

// Thin wrapper implementations that delegate to persistence
#[async_trait]
impl<N: ConnectedNetwork<PubKey>, D: Sync, P: SequencerPersistence> StateCertDataSource
    for StorageState<N, P, D>
{
    async fn get_state_cert_by_epoch(
        &self,
        epoch: u64,
    ) -> anyhow::Result<Option<LightClientStateUpdateCertificateV2<SeqTypes>>> {
        self.as_ref().get_state_cert_by_epoch(epoch).await
    }

    async fn insert_state_cert(
        &self,
        epoch: u64,
        cert: LightClientStateUpdateCertificateV2<SeqTypes>,
    ) -> anyhow::Result<()> {
        self.as_ref().insert_state_cert(epoch, cert).await
    }
}

#[async_trait]
impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> StateCertDataSource for ApiState<N, P> {
    async fn get_state_cert_by_epoch(
        &self,
        epoch: u64,
    ) -> anyhow::Result<Option<LightClientStateUpdateCertificateV2<SeqTypes>>> {
        let storage = self.consensus_handle().await.storage().await;
        storage.get_state_cert_by_epoch(epoch).await
    }

    async fn insert_state_cert(
        &self,
        epoch: u64,
        cert: LightClientStateUpdateCertificateV2<SeqTypes>,
    ) -> anyhow::Result<()> {
        let storage = self.consensus_handle().await.storage().await;
        storage.insert_state_cert(epoch, cert).await
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> SubmitDataSource<N, P>
    for ApiState<N, P>
{
    async fn submit(&self, tx: Transaction) -> anyhow::Result<()> {
        let handle = self.consensus_handle().await;

        // Fetch full chain config from the validated state, if present.
        // This is necessary because we support chain config upgrades,
        // so the updated chain config is found in the validated state.
        let cf = handle
            .decided_state()
            .await
            .and_then(|state| state.chain_config.resolve());

        // Use the chain config from the validated state if available,
        // otherwise, use the node state's chain config
        // The node state's chain config is the node's base version chain config
        let cf = match cf {
            Some(cf) => cf,
            None => self.node_state().await.chain_config,
        };

        let max_block_size: u64 = cf.max_block_size.into();
        let txn_size = tx.payload().len() as u64;

        // reject transaction bigger than block size
        if txn_size > max_block_size {
            bail!("transaction size ({txn_size}) is greater than max_block_size ({max_block_size})")
        }

        handle.submit_transaction(tx).await?;
        Ok(())
    }
}

impl<N, P, D> NodeStateDataSource for StorageState<N, P, D>
where
    N: ConnectedNetwork<PubKey>,
    P: SequencerPersistence,
    D: Sync,
{
    async fn node_state(&self) -> NodeState {
        self.as_ref().node_state().await
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence, D: CatchupStorage + Send + Sync>
    data_source::DatabaseMetadataSource for StorageState<N, P, D>
where
    N: ConnectedNetwork<PubKey>,
    P: SequencerPersistence,
    D: data_source::DatabaseMetadataSource + Send + Sync,
{
    async fn get_table_sizes(&self) -> anyhow::Result<Vec<data_source::TableSize>> {
        self.inner().get_table_sizes().await
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence, D: CatchupStorage + Send + Sync>
    data_source::PruningDataSource for StorageState<N, P, D>
where
    N: ConnectedNetwork<PubKey>,
    P: SequencerPersistence,
    D: data_source::PruningDataSource + Send + Sync,
{
    async fn get_oldest_block(
        &self,
    ) -> anyhow::Result<Option<hotshot_query_service::availability::BlockQueryData<crate::SeqTypes>>>
    {
        self.inner().get_oldest_block().await
    }

    async fn get_oldest_leaf(
        &self,
    ) -> anyhow::Result<Option<hotshot_query_service::availability::LeafQueryData<crate::SeqTypes>>>
    {
        self.inner().get_oldest_leaf().await
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence, D: CatchupStorage + Send + Sync>
    CatchupDataSource for StorageState<N, P, D>
{
    #[tracing::instrument(skip(self, instance))]
    async fn get_accounts(
        &self,
        instance: &NodeState,
        height: u64,
        view: ViewNumber,
        accounts: &[FeeAccount],
    ) -> anyhow::Result<FeeMerkleTree> {
        // Check if we have the desired state in memory.
        match self
            .as_ref()
            .get_accounts(instance, height, view, accounts)
            .await
        {
            Ok(accounts) => return Ok(accounts),
            Err(err) => {
                tracing::info!("accounts not in memory, trying storage: {err:#}");
            },
        }

        // Try storage.
        let (tree, leaf) = self
            .inner()
            .get_accounts(instance, height, view, accounts)
            .await
            .context("accounts not in memory, and could not fetch from storage")?;
        // If we successfully fetched accounts from storage, try to add them back into the in-memory
        // state.

        let handle = self.as_ref().consensus_handle().await;
        if let Err(err) = add_fee_accounts_to_state(&*handle, &view, accounts, &tree, leaf).await {
            tracing::warn!(?view, "cannot update fetched account state: {err:#}");
        }
        tracing::info!(?view, "updated with fetched account state");

        Ok(tree)
    }

    #[tracing::instrument(skip(self, instance))]
    async fn get_frontier(
        &self,
        instance: &NodeState,
        height: u64,
        view: ViewNumber,
    ) -> anyhow::Result<BlocksFrontier> {
        // Check if we have the desired state in memory.
        match self.as_ref().get_frontier(instance, height, view).await {
            Ok(frontier) => return Ok(frontier),
            Err(err) => {
                tracing::info!("frontier is not in memory, trying storage: {err:#}");
            },
        }

        // Try storage.
        self.inner().get_frontier(instance, height, view).await
    }

    async fn get_chain_config(
        &self,
        commitment: Commitment<ChainConfig>,
    ) -> anyhow::Result<ChainConfig> {
        // Check if we have the desired state in memory.
        match self.as_ref().get_chain_config(commitment).await {
            Ok(cf) => return Ok(cf),
            Err(err) => {
                tracing::info!("chain config is not in memory, trying storage: {err:#}");
            },
        }

        // Try storage.
        self.inner().get_chain_config(commitment).await
    }
    async fn get_leaf_chain(&self, height: u64) -> anyhow::Result<Vec<Leaf2>> {
        // Check if we have the desired state in memory.
        match self.as_ref().get_leaf_chain(height).await {
            Ok(cf) => return Ok(cf),
            Err(err) => {
                tracing::info!("leaf chain is not in memory, trying storage: {err:#}");
            },
        }

        // Try storage.
        self.inner().get_leaf_chain(height).await
    }

    async fn get_cert2(
        &self,
        height: u64,
    ) -> anyhow::Result<Option<espresso_types::Certificate2<SeqTypes>>> {
        self.inner().load_earliest_cert2(height).await
    }

    #[tracing::instrument(skip(self, instance))]
    async fn get_reward_accounts_v2(
        &self,
        instance: &NodeState,
        height: u64,
        view: ViewNumber,
        accounts: &[RewardAccountV2],
    ) -> anyhow::Result<RewardMerkleTreeV2> {
        // Check if we have the desired state in memory.
        match self
            .as_ref()
            .get_reward_accounts_v2(instance, height, view, accounts)
            .await
        {
            Ok(accounts) => return Ok(accounts),
            Err(err) => {
                tracing::info!("reward accounts not in memory, trying storage: {err:#}");
            },
        }

        // Try storage.
        let (tree, leaf) = self
            .inner()
            .get_reward_accounts_v2(instance, height, view, accounts)
            .await
            .context("accounts not in memory, and could not fetch from storage")?;

        // If we successfully fetched accounts from storage, try to add them back into the in-memory
        // state.
        let handle = self.as_ref().consensus_handle().await;
        if let Err(err) =
            add_v2_reward_accounts_to_state(&*handle, &view, accounts, &tree, leaf).await
        {
            tracing::warn!(?view, "cannot update fetched account state: {err:#}");
        }
        tracing::info!(?view, "updated with fetched account state");

        Ok(tree)
    }

    #[tracing::instrument(skip(self, instance))]
    async fn get_reward_accounts_v1(
        &self,
        instance: &NodeState,
        height: u64,
        view: ViewNumber,
        accounts: &[RewardAccountV1],
    ) -> anyhow::Result<RewardMerkleTreeV1> {
        // Check if we have the desired state in memory.
        match self
            .as_ref()
            .get_reward_accounts_v1(instance, height, view, accounts)
            .await
        {
            Ok(accounts) => return Ok(accounts),
            Err(err) => {
                tracing::info!("reward accounts not in memory, trying storage: {err:#}");
            },
        }

        // Try storage.
        let (tree, leaf) = self
            .inner()
            .get_reward_accounts_v1(instance, height, view, accounts)
            .await
            .context("accounts not in memory, and could not fetch from storage")?;

        // If we successfully fetched accounts from storage, try to add them back into the in-memory
        // state.
        let handle = self.as_ref().consensus_handle().await;
        if let Err(err) =
            add_v1_reward_accounts_to_state(&*handle, &view, accounts, &tree, leaf).await
        {
            tracing::warn!(?view, "cannot update fetched account state: {err:#}");
        }
        tracing::info!(?view, "updated with fetched account state");

        Ok(tree)
    }

    async fn get_reward_merkle_tree_v2(
        &self,
        height: u64,
        view: ViewNumber,
    ) -> anyhow::Result<Vec<u8>> {
        self.as_ref().get_reward_merkle_tree_v2(height, view).await
    }

    #[tracing::instrument(skip(self))]
    async fn get_state_cert(
        &self,
        epoch: u64,
    ) -> anyhow::Result<LightClientStateUpdateCertificateV2<SeqTypes>> {
        let storage = self.as_ref().consensus_handle().await.storage().await;
        storage
            .get_state_cert_by_epoch(epoch)
            .await?
            .context(format!("state cert for epoch {epoch} not found"))
    }
}

impl<N, P> NodeStateDataSource for ApiState<N, P>
where
    N: ConnectedNetwork<PubKey>,
    P: SequencerPersistence,
{
    async fn node_state(&self) -> NodeState {
        self.sequencer_context.as_ref().get().await.node_state()
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> CatchupDataSource for ApiState<N, P> {
    #[tracing::instrument(skip(self, _instance))]
    async fn get_accounts(
        &self,
        _instance: &NodeState,
        height: u64,
        view: ViewNumber,
        accounts: &[FeeAccount],
    ) -> anyhow::Result<FeeMerkleTree> {
        let state = self
            .consensus_handle()
            .await
            .state(view)
            .await
            .context(format!(
                "state not available for height {height}, view {view}"
            ))?;
        retain_accounts(&state.fee_merkle_tree, accounts.iter().copied())
    }

    #[tracing::instrument(skip(self, _instance))]
    async fn get_frontier(
        &self,
        _instance: &NodeState,
        height: u64,
        view: ViewNumber,
    ) -> anyhow::Result<BlocksFrontier> {
        let state = self
            .consensus_handle()
            .await
            .state(view)
            .await
            .context(format!(
                "state not available for height {height}, view {view}"
            ))?;
        let tree = &state.block_merkle_tree;
        let frontier = tree.lookup(tree.num_leaves() - 1).expect_ok()?.1;
        Ok(frontier)
    }

    async fn get_chain_config(
        &self,
        commitment: Commitment<ChainConfig>,
    ) -> anyhow::Result<ChainConfig> {
        let state = self
            .consensus_handle()
            .await
            .decided_state()
            .await
            .context("decided state not available")?;
        let chain_config = state.chain_config;

        if chain_config.commit() == commitment {
            chain_config.resolve().context("chain config found")
        } else {
            bail!("chain config not found")
        }
    }

    async fn get_leaf_chain(&self, height: u64) -> anyhow::Result<Vec<Leaf2>> {
        // Builds a legacy 3-chain from undecided leaves in memory. New-protocol heights fall
        // through to the storage path.
        let mut leaves = self.consensus_handle().await.undecided_leaves().await;
        leaves.sort_by_key(|l| l.view_number());
        let (position, mut last_leaf) = leaves
            .iter()
            .find_position(|l| l.height() == height)
            .context(format!("leaf chain not available for {height}"))?;
        let mut chain = vec![last_leaf.clone()];
        for leaf in leaves.iter().skip(position + 1) {
            if leaf.justify_qc().view_number() == last_leaf.view_number() {
                chain.push(leaf.clone());
            } else {
                continue;
            }
            if leaf.view_number() == last_leaf.view_number() + 1 {
                // one away from decide
                last_leaf = leaf;
                break;
            }
            last_leaf = leaf;
        }
        // Make sure we got one more leaf to confirm the decide
        for leaf in leaves
            .iter()
            .skip_while(|l| l.view_number() <= last_leaf.view_number())
        {
            if leaf.justify_qc().view_number() == last_leaf.view_number() {
                chain.push(leaf.clone());
                return Ok(chain);
            }
        }
        bail!(format!("leaf chain not available for {height}"))
    }

    #[tracing::instrument(skip(self, _instance))]
    async fn get_reward_accounts_v2(
        &self,
        _instance: &NodeState,
        height: u64,
        view: ViewNumber,
        accounts: &[RewardAccountV2],
    ) -> anyhow::Result<RewardMerkleTreeV2> {
        let state = self
            .consensus_handle()
            .await
            .state(view)
            .await
            .context(format!(
                "state not available for height {height}, view {view}"
            ))?;

        retain_v2_reward_accounts(&state.reward_merkle_tree_v2, accounts.iter().copied())
    }

    #[tracing::instrument(skip(self, _instance))]
    async fn get_reward_accounts_v1(
        &self,
        _instance: &NodeState,
        height: u64,
        view: ViewNumber,
        accounts: &[RewardAccountV1],
    ) -> anyhow::Result<RewardMerkleTreeV1> {
        let state = self
            .consensus_handle()
            .await
            .state(view)
            .await
            .context(format!(
                "state not available for height {height}, view {view}"
            ))?;

        retain_v1_reward_accounts(&state.reward_merkle_tree_v1, accounts.iter().copied())
    }

    async fn get_reward_merkle_tree_v2(
        &self,
        height: u64,
        view: ViewNumber,
    ) -> anyhow::Result<Vec<u8>> {
        let state = self
            .consensus_handle()
            .await
            .state(view)
            .await
            .context(format!(
                "state not available for height {height}, view {view}"
            ))?;

        let merkle_tree_bytes = bincode::serialize(&TryInto::<RewardMerkleTreeV2Data>::try_into(
            &state.reward_merkle_tree_v2,
        )?)
        .context("Merkle tree serialization failed; this should never happen.")?;

        Ok(merkle_tree_bytes)
    }

    async fn get_state_cert(
        &self,
        epoch: u64,
    ) -> anyhow::Result<LightClientStateUpdateCertificateV2<SeqTypes>> {
        self.get_state_cert_by_epoch(epoch)
            .await?
            .context(format!("state cert not found for epoch {epoch}"))
    }
}

impl<N: ConnectedNetwork<PubKey>, D: Sync, P: SequencerPersistence> HotShotConfigDataSource
    for StorageState<N, P, D>
{
    async fn get_config(&self) -> PublicNetworkConfig {
        self.as_ref().network_config().await.into()
    }
}

impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> HotShotConfigDataSource
    for ApiState<N, P>
{
    async fn get_config(&self) -> PublicNetworkConfig {
        self.network_config().await.into()
    }
}

#[async_trait]
impl<N: ConnectedNetwork<PubKey>, D: Sync, P: SequencerPersistence> StateSignatureDataSource<N>
    for StorageState<N, P, D>
{
    async fn get_state_signature(&self, height: u64) -> Option<LCV3StateSignatureRequestBody> {
        self.as_ref().get_state_signature(height).await
    }
}

#[async_trait]
impl<N: ConnectedNetwork<PubKey>, P: SequencerPersistence> StateSignatureDataSource<N>
    for ApiState<N, P>
{
    async fn get_state_signature(&self, height: u64) -> Option<LCV3StateSignatureRequestBody> {
        self.state_signer()
            .await
            .read()
            .await
            .get_state_signature(height)
            .await
    }
}

#[derive(Serialize, Deserialize, Debug, Clone)]
/// Representation of the RewardMerkleTreeV2 as a set of key-value pairs
pub struct RewardMerkleTreeV2Data {
    pub balances: Vec<(RewardAccountV2, RewardAmount)>,
}

impl TryInto<RewardMerkleTreeV2Data> for &RewardMerkleTreeV2 {
    type Error = anyhow::Error;
    // Required method
    fn try_into(self) -> anyhow::Result<RewardMerkleTreeV2Data> {
        let num_leaves = self.num_leaves();

        let balances: Vec<_> = self
            .iter()
            .map(|(account, balance)| (*account, *balance))
            .collect();

        if balances.len() as u64 == num_leaves {
            Ok(RewardMerkleTreeV2Data { balances })
        } else {
            tracing::error!(
                "Attempted to serialize an incomplete RewardMerkleTreeV2. This is not a fatal \
                 error, but it should never happen and indicates that something may be seriously \
                 wrong. Balances length: {}, num_leaves: {}.",
                balances.len(),
                num_leaves
            );
            bail!(
                "Failed to convert RewardMerkleTreeV2 into key-value pairs. Some accounts are \
                 missing."
            );
        }
    }
}

pub(crate) trait RewardMerkleTreeDataSource: Send + Sync + Clone + 'static {
    fn load_v1_reward_account_proof(
        &self,
        _height: u64,
        _account: RewardAccountV1,
    ) -> impl Send + Future<Output = anyhow::Result<RewardAccountQueryDataV1>>;

    fn save_and_gc_reward_tree_v2(
        &self,
        node_state: &NodeState,
        height: u64,
        version: Version,
        merkle_tree: &RewardMerkleTreeV2,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move {
            let serialization =
                bincode::serialize(&TryInto::<RewardMerkleTreeV2Data>::try_into(merkle_tree)?)
                    .context("Merkle tree serialization failed")?;
            self.persist_tree(height, serialization).await?;

            // Skip garbage collection in tests
            if cfg!(any(test, feature = "testing")) {
                return Ok(());
            }

            let finalized_hotshot_height = match node_state.finalized_hotshot_height().await {
                Ok(h) => h,
                Err(err) => {
                    tracing::warn!("failed to get finalized hotshot height: {err:#}");
                    return Ok(());
                },
            };

            // trees at heights strictly less than the gc height are deleted
            //
            // keep recent epochs reward trees
            //   - staking-api-service at startup calls `reward-amounts` at
            //     `epoch_start - 1`, which needs the previous epoch's last-block
            //     tree on disk.
            //   - Per epoch reward (EPOCH_REWARD_VERSION+): `fetch_and_calculate`
            //     reads the previous epoch's last block tree to compute the next
            //     epoch's rewards.
            //
            // `finalized_hotshot_height`:  Reward claims
            //   (`reward-claim-input`) target the LightClient L1 finalization
            //   exactly.

            let epoch_height = node_state
                .epoch_height
                .context("reward tree gc requires an epoch height")?;
            // EPOCH_REWARD_VERSION (V5)+ only persists a tree at each epoch boundary,
            // so 5 epochs = 5 trees on disk. Earlier versions persist a tree at
            // every block, so 1 epoch is already epoch_height trees — keeping more
            // would be expensive. We only need 1 epoch for both, but the extra
            // trees are cheap for V5+ so it doesn't make much of a difference.
            let epochs_to_retain = if version >= versions::EPOCH_REWARD_VERSION {
                5
            } else {
                1
            };
            let current_epoch = epoch_from_block_number(height, epoch_height);
            // First block of the oldest epoch we still want to retain.
            let epoch_start_block = current_epoch.saturating_sub(epochs_to_retain) * epoch_height;

            let gc_height = epoch_start_block.min(finalized_hotshot_height);

            if let Err(err) = self.garbage_collect(gc_height).await {
                tracing::info!(gc_height, "failed to garbage collect: {err:#}");
            }

            Ok(())
        }
    }

    fn persist_reward_proofs(
        &self,
        node_state: &NodeState,
        height: u64,
        version: Version,
    ) -> impl Send + Future<Output = anyhow::Result<()>>;

    fn load_reward_merkle_tree_v2(
        &self,
        height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<PermittedRewardMerkleTreeV2>> {
        async move {
            let tree_bytes = self.load_tree(height).await?;

            let tree_data = bincode::deserialize::<RewardMerkleTreeV2Data>(&tree_bytes).context(
                "Failed to deserialize RewardMerkleTreeV2 for height {height} from storage; this \
                 should never happen.",
            )?;

            PermittedRewardMerkleTreeV2::try_from_kv_set(tree_data.balances)
                .await
                .context("Failed to reconstruct reward merkle tree from storage")
        }
    }

    /// Returns the RewardMerkleTreeV2 for height <= requested height
    ///
    /// After V5 the tree is only written at epoch boundaries, so `reward_merkle_tree_v2_data`
    /// has no row for most heights. Within an epoch the tree doesn't change, so the previous
    /// boundary's tree matches the current block's reward root but only if we're actually in
    /// the same epoch. The caller is responsible for checking the returned tree's commitment
    /// against the header at `height`.
    /// if they differ we loaded a tree from an older epoch.
    fn load_latest_reward_merkle_tree_v2(
        &self,
        height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<PermittedRewardMerkleTreeV2>> {
        async move {
            let tree_bytes = self.load_latest_tree(height).await?;

            let tree_data = bincode::deserialize::<RewardMerkleTreeV2Data>(&tree_bytes)
                .context("Failed to deserialize RewardMerkleTreeV2 from storage")?;

            PermittedRewardMerkleTreeV2::try_from_kv_set(tree_data.balances)
                .await
                .context("Failed to reconstruct reward merkle tree from storage")
        }
    }

    fn load_reward_account_proof_v2(
        &self,
        _height: u64,
        _account: RewardAccountV2,
    ) -> impl Send + Future<Output = anyhow::Result<RewardAccountQueryDataV2>> {
        async {
            bail!("load_reward_account_proof_v2 is not supported for this data source");
        }
    }

    fn load_latest_reward_account_proof_v2(
        &self,
        account: RewardAccountV2,
    ) -> impl Send + Future<Output = anyhow::Result<RewardAccountQueryDataV2>> {
        async move {
            let serialized_account = bincode::serialize(&account).context(
                "Failed to serialize RewardAccountV2 for lookup; this should never happen.",
            )?;
            let proof_bytes = self.load_latest_proof(serialized_account).await?;

            bincode::deserialize::<RewardAccountQueryDataV2>(&proof_bytes).context(
                "Failed to deserialize RewardAccountQueryDataV2 for account {account} from \
                 storage; this should never happen.",
            )
        }
    }

    fn persist_tree(
        &self,
        height: u64,
        merkle_tree: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<()>>;

    fn load_tree(&self, height: u64) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>>;

    /// Load the latest serialized reward merkle tree v2 at height `<= height`.
    fn load_latest_tree(&self, height: u64)
    -> impl Send + Future<Output = anyhow::Result<Vec<u8>>>;

    fn persist_proofs(
        &self,
        height: u64,
        proofs: impl Iterator<Item = (Vec<u8>, Vec<u8>)> + Send,
    ) -> impl Send + Future<Output = anyhow::Result<()>>;

    fn load_proof(
        &self,
        height: u64,
        account: Vec<u8>,
        epoch_height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>>;

    fn load_latest_proof(
        &self,
        account: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>>;

    fn proof_exists(&self, height: u64) -> impl Send + Future<Output = bool>;

    /// garbage collects merkle tree data for blocks strictly older than `height`
    fn garbage_collect(&self, height: u64) -> impl Send + Future<Output = anyhow::Result<()>>;
}

impl RewardMerkleTreeDataSource for hotshot_query_service::data_source::MetricsDataSource {
    fn load_v1_reward_account_proof(
        &self,
        _height: u64,
        _account: RewardAccountV1,
    ) -> impl Send + Future<Output = anyhow::Result<RewardAccountQueryDataV1>> {
        async {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn persist_reward_proofs(
        &self,
        _node_state: &NodeState,
        _height: u64,
        _version: Version,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn persist_tree(
        &self,
        _height: u64,
        _merkle_tree: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn load_tree(&self, _height: u64) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn load_latest_tree(
        &self,
        _height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn garbage_collect(&self, _height: u64) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn persist_proofs(
        &self,
        _height: u64,
        _proofs: impl Iterator<Item = (Vec<u8>, Vec<u8>)> + Send,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn load_proof(
        &self,
        _height: u64,
        _account: Vec<u8>,
        _epoch_height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn load_latest_proof(
        &self,
        _account: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move {
            bail!("reward merklized state is not supported for this data source");
        }
    }

    fn proof_exists(&self, _height: u64) -> impl Send + Future<Output = bool> {
        async move { false }
    }
}

impl<T, S> RewardMerkleTreeDataSource
    for hotshot_query_service::data_source::ExtensibleDataSource<T, S>
where
    T: RewardMerkleTreeDataSource,
    S: Send + Sync + Clone + NodeStateDataSource + 'static,
{
    async fn load_v1_reward_account_proof(
        &self,
        height: u64,
        account: RewardAccountV1,
    ) -> anyhow::Result<RewardAccountQueryDataV1> {
        self.inner()
            .load_v1_reward_account_proof(height, account)
            .await
    }

    async fn load_reward_account_proof_v2(
        &self,
        height: u64,
        account: RewardAccountV2,
    ) -> anyhow::Result<RewardAccountQueryDataV2> {
        let epoch_height = self
            .as_ref()
            .node_state()
            .await
            .epoch_height
            .context("epoch height not found")?;
        let serialized_account = bincode::serialize(&account)
            .context("Failed to serialize RewardAccountV2 for lookup; this should never happen.")?;
        let proof_bytes = self
            .inner()
            .load_proof(height, serialized_account, epoch_height)
            .await?;

        bincode::deserialize::<RewardAccountQueryDataV2>(&proof_bytes)
            .context("Failed to deserialize RewardAccountQueryDataV2 from storage")
    }

    fn persist_tree(
        &self,
        height: u64,
        merkle_tree: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move { self.inner().persist_tree(height, merkle_tree).await }
    }

    fn load_tree(&self, height: u64) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { self.inner().load_tree(height).await }
    }

    fn load_latest_tree(
        &self,
        height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { self.inner().load_latest_tree(height).await }
    }

    fn garbage_collect(&self, height: u64) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move { self.inner().garbage_collect(height).await }
    }

    fn persist_proofs(
        &self,
        height: u64,
        proofs: impl Iterator<Item = (Vec<u8>, Vec<u8>)> + Send,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move { self.inner().persist_proofs(height, proofs).await }
    }

    fn load_proof(
        &self,
        height: u64,
        account: Vec<u8>,
        epoch_height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { self.inner().load_proof(height, account, epoch_height).await }
    }

    fn load_latest_proof(
        &self,
        account: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { self.inner().load_latest_proof(account).await }
    }

    fn proof_exists(&self, height: u64) -> impl Send + Future<Output = bool> {
        async move { self.inner().proof_exists(height).await }
    }

    fn persist_reward_proofs(
        &self,
        node_state: &NodeState,
        height: u64,
        version: Version,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move {
            self.inner()
                .persist_reward_proofs(node_state, height, version)
                .await
        }
    }
}

// Implement Reward MerkleTreeDataSource for Arc<D> to allow shared ownership
impl<D> RewardMerkleTreeDataSource for Arc<D>
where
    D: RewardMerkleTreeDataSource,
{
    async fn load_v1_reward_account_proof(
        &self,
        height: u64,
        account: RewardAccountV1,
    ) -> anyhow::Result<RewardAccountQueryDataV1> {
        (**self).load_v1_reward_account_proof(height, account).await
    }

    fn persist_tree(
        &self,
        height: u64,
        merkle_tree: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move { (**self).persist_tree(height, merkle_tree).await }
    }

    fn load_tree(&self, height: u64) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { (**self).load_tree(height).await }
    }

    fn load_latest_tree(
        &self,
        height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { (**self).load_latest_tree(height).await }
    }

    fn load_reward_merkle_tree_v2(
        &self,
        height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<PermittedRewardMerkleTreeV2>> {
        async move { (**self).load_reward_merkle_tree_v2(height).await }
    }

    fn load_reward_account_proof_v2(
        &self,
        height: u64,
        account: RewardAccountV2,
    ) -> impl Send + Future<Output = anyhow::Result<RewardAccountQueryDataV2>> {
        async move { (**self).load_reward_account_proof_v2(height, account).await }
    }

    fn persist_proofs(
        &self,
        height: u64,
        proofs: impl Iterator<Item = (Vec<u8>, Vec<u8>)> + Send,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move { (**self).persist_proofs(height, proofs).await }
    }

    fn persist_reward_proofs(
        &self,
        node_state: &NodeState,
        height: u64,
        version: Version,
    ) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move {
            (**self)
                .persist_reward_proofs(node_state, height, version)
                .await
        }
    }

    fn load_proof(
        &self,
        height: u64,
        account: Vec<u8>,
        epoch_height: u64,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { (**self).load_proof(height, account, epoch_height).await }
    }

    fn proof_exists(&self, height: u64) -> impl Send + Future<Output = bool> {
        async move { (**self).proof_exists(height).await }
    }

    fn load_latest_proof(
        &self,
        account: Vec<u8>,
    ) -> impl Send + Future<Output = anyhow::Result<Vec<u8>>> {
        async move { (**self).load_latest_proof(account).await }
    }

    fn garbage_collect(&self, height: u64) -> impl Send + Future<Output = anyhow::Result<()>> {
        async move { (**self).garbage_collect(height).await }
    }
}

/// [`Provider`] implementation wrapping a lazy [`LightClient`].
///
/// The [`LightClient`] requires a genesis to initialize itself, which we can get from the
/// [`ApiState`]. However, the [`Provider`] instance must be provided to the API data source at
/// initialization time, while the [`ApiState`] is only initialized lazily. This is a provider
/// implementation which is itself initialized lazily: [`Provider::fetch`] calls will time out until
/// the underlying [`ApiState`] is fully initialized, at which point this provider will start
/// serving fetches using the [`LightClient`].
#[derive(Debug)]
struct LightClientProvider {
    light_client: BoxLazy<LightClient<SqliteStorage, FallbackClient<QueryServiceClient>>>,
}

impl LightClientProvider {
    pub async fn new<N, P>(
        peers: impl IntoIterator<Item = Url>,
        state: ApiState<N, P>,
        opt: LightClientOptions,
        db_opt: LightClientSqliteOptions,
    ) -> anyhow::Result<Self>
    where
        N: ConnectedNetwork<PubKey>,
        P: SequencerPersistence,
    {
        let db = db_opt
            .connect()
            .await
            .context("creating SQLite database for light client")?;
        let client = FallbackClient::new(peers.into_iter().map(QueryServiceClient::new).collect())?;
        let init_light_client = async move {
            let config = state.network_config().await;
            let epoch_height = config.config.epoch_height;
            let first_epoch =
                epoch_from_block_number(config.config.epoch_start_block, epoch_height);

            let genesis = Genesis {
                epoch_height,

                // Dynamic state starts from the third epoch, since we need the prior epoch's root
                // to have the upgraded header with the stake table hash.
                first_epoch_with_dynamic_stake_table: EpochNumber::new(first_epoch + 2),

                stake_table: config
                    .config
                    .known_nodes_with_stake
                    .into_iter()
                    .map(|peer| peer.stake_table_entry)
                    .collect(),
            };
            LightClient::from_genesis_with_options(db, client, genesis, opt)
        };
        Ok(Self {
            light_client: Arc::pin(Lazy::from_future(init_light_client.boxed())),
        })
    }
}

#[async_trait]
impl<T> Provider<SeqTypes, T> for LightClientProvider
where
    T: fetching::Request<SeqTypes> + 'static,
    LightClient<SqliteStorage, FallbackClient<QueryServiceClient>>: Provider<SeqTypes, T>,
{
    async fn fetch(&self, req: T) -> Option<T::Response> {
        self.light_client.as_ref().get().await.fetch(req).await
    }
}

#[cfg(any(test, feature = "testing"))]
pub mod test_helpers {
    use std::{cmp::max, time::Duration};

    use alloy::{
        network::EthereumWallet,
        primitives::{Address, U256},
        providers::{ProviderBuilder, ext::AnvilApi},
    };
    use committable::Committable;
    use espresso_contract_deployer::{
        Contract, Contracts, DEFAULT_EXIT_ESCROW_PERIOD_SECONDS, builder::DeployerArgsBuilder,
        network_config::light_client_genesis_from_stake_table,
    };
    use espresso_types::{
        MOCK_SEQUENCER_VERSIONS, NamespaceId, ValidatedState,
        v0::traits::{NullEventConsumer, PersistenceOptions, StateCatchup},
    };
    use futures::{
        future::{FutureExt, join_all},
        stream::StreamExt,
    };
    use hotshot::types::{Event, EventType};
    use hotshot_contract_adapter::stake_table::StakeTableContractVersion;
    use hotshot_types::{
        event::LeafInfo, light_client::LCV3StateSignatureRequestBody,
        new_protocol::CoordinatorEvent, traits::metrics::NoMetrics,
    };
    use itertools::izip;
    use jf_merkle_tree_compat::{MerkleCommitment, MerkleTreeScheme};
    use staking_cli::demo::{DelegationConfig, StakingTransactions};
    use surf_disco::Client;
    use tempfile::TempDir;
    use test_utils::reserve_tcp_port;
    use tide_disco::{Api, App, Error, StatusCode, error::ServerError};
    use tokio::{spawn, task::JoinHandle, time::sleep};
    use url::Url;
    use vbs::version::{StaticVersion, StaticVersionType};
    use versions::{EPOCH_VERSION, Upgrade};

    use super::*;
    use crate::{
        catchup::NullStateCatchup,
        network,
        persistence::no_storage,
        testing::{TestConfig, TestConfigBuilder, run_legacy_builder, wait_for_decide_on_handle},
    };

    pub const STAKE_TABLE_CAPACITY_FOR_TEST: usize = 10;

    pub struct TestNetwork<P: PersistenceOptions, const NUM_NODES: usize> {
        pub server: SequencerContext<network::Memory, P::Persistence>,
        pub peers: Vec<SequencerContext<network::Memory, P::Persistence>>,
        pub cfg: TestConfig<{ NUM_NODES }>,
        // todo (abdul): remove this when fs storage is removed
        pub temp_dir: Option<TempDir>,
        pub contracts: Option<Contracts>,
    }

    pub struct TestNetworkConfig<const NUM_NODES: usize, P, C>
    where
        P: PersistenceOptions,
        C: StateCatchup + 'static,
    {
        state: [ValidatedState; NUM_NODES],
        persistence: [P; NUM_NODES],
        catchup: [C; NUM_NODES],
        network_config: TestConfig<{ NUM_NODES }>,
        api_config: Options,
        contracts: Option<Contracts>,
    }

    impl<const NUM_NODES: usize, P, C> TestNetworkConfig<{ NUM_NODES }, P, C>
    where
        P: PersistenceOptions,
        C: StateCatchup + 'static,
    {
        pub fn states(&self) -> [ValidatedState; NUM_NODES] {
            self.state.clone()
        }
    }

    #[derive(Clone)]
    pub struct TestNetworkConfigBuilder<const NUM_NODES: usize, P, C>
    where
        P: PersistenceOptions,
        C: StateCatchup + 'static,
    {
        state: [ValidatedState; NUM_NODES],
        persistence: Option<[P; NUM_NODES]>,
        catchup: Option<[C; NUM_NODES]>,
        api_config: Option<Options>,
        network_config: Option<TestConfig<{ NUM_NODES }>>,
        contracts: Option<Contracts>,
        initial_token_supply: Option<U256>,
    }

    impl Default for TestNetworkConfigBuilder<5, no_storage::Options, NullStateCatchup> {
        fn default() -> Self {
            TestNetworkConfigBuilder {
                state: std::array::from_fn(|_| ValidatedState::default()),
                persistence: Some([no_storage::Options; 5]),
                catchup: Some(std::array::from_fn(|_| NullStateCatchup::default())),
                network_config: None,
                api_config: None,
                contracts: None,
                initial_token_supply: None,
            }
        }
    }

    impl<const NUM_NODES: usize>
        TestNetworkConfigBuilder<{ NUM_NODES }, no_storage::Options, NullStateCatchup>
    {
        pub fn with_num_nodes()
        -> TestNetworkConfigBuilder<{ NUM_NODES }, no_storage::Options, NullStateCatchup> {
            TestNetworkConfigBuilder {
                state: std::array::from_fn(|_| ValidatedState::default()),
                persistence: Some([no_storage::Options; { NUM_NODES }]),
                catchup: Some(std::array::from_fn(|_| NullStateCatchup::default())),
                network_config: None,
                api_config: None,
                contracts: None,
                initial_token_supply: None,
            }
        }
    }

    impl<const NUM_NODES: usize, P, C> TestNetworkConfigBuilder<{ NUM_NODES }, P, C>
    where
        P: PersistenceOptions,
        C: StateCatchup + 'static,
    {
        pub fn states(mut self, state: [ValidatedState; NUM_NODES]) -> Self {
            self.state = state;
            self
        }

        pub fn initial_token_supply(mut self, supply: U256) -> Self {
            self.initial_token_supply = Some(supply);
            self
        }

        pub fn persistences<NP: PersistenceOptions>(
            self,
            persistence: [NP; NUM_NODES],
        ) -> TestNetworkConfigBuilder<{ NUM_NODES }, NP, C> {
            TestNetworkConfigBuilder {
                state: self.state,
                catchup: self.catchup,
                network_config: self.network_config,
                api_config: self.api_config,
                persistence: Some(persistence),
                contracts: self.contracts,
                initial_token_supply: self.initial_token_supply,
            }
        }

        pub fn api_config(mut self, api_config: Options) -> Self {
            self.api_config = Some(api_config);
            self
        }

        pub fn catchups<NC: StateCatchup + 'static>(
            self,
            catchup: [NC; NUM_NODES],
        ) -> TestNetworkConfigBuilder<{ NUM_NODES }, P, NC> {
            TestNetworkConfigBuilder {
                state: self.state,
                catchup: Some(catchup),
                network_config: self.network_config,
                api_config: self.api_config,
                persistence: self.persistence,
                contracts: self.contracts,
                initial_token_supply: self.initial_token_supply,
            }
        }

        pub fn network_config(mut self, network_config: TestConfig<{ NUM_NODES }>) -> Self {
            self.network_config = Some(network_config);
            self
        }

        pub fn contracts(mut self, contracts: Contracts) -> Self {
            self.contracts = Some(contracts);
            self
        }

        /// Setup for POS testing. Deploys contracts and adds the
        /// stake table address to state. Must be called before `build()`.
        pub async fn pos_hook(
            self,
            delegation_config: DelegationConfig,
            stake_table_version: StakeTableContractVersion,
            upgrade: Upgrade,
        ) -> anyhow::Result<Self> {
            if upgrade.base < EPOCH_VERSION && upgrade.target < EPOCH_VERSION {
                panic!("given version does not require pos deployment");
            };

            let network_config = self
                .network_config
                .as_ref()
                .expect("network_config is required");

            let l1_url = network_config.l1_url();
            let signer = network_config.signer();
            let deployer = ProviderBuilder::new()
                .wallet(EthereumWallet::from(signer.clone()))
                .connect_http(l1_url.clone());

            let blocks_per_epoch = network_config.hotshot_config().epoch_height;
            let epoch_start_block = network_config.hotshot_config().epoch_start_block;
            let (genesis_state, genesis_stake) = light_client_genesis_from_stake_table(
                &network_config.hotshot_config().hotshot_stake_table(),
                STAKE_TABLE_CAPACITY_FOR_TEST,
            )
            .unwrap();

            let mut contracts = Contracts::new();
            let args = DeployerArgsBuilder::default()
                .deployer(deployer.clone())
                .rpc_url(l1_url.clone())
                .mock_light_client(true)
                .genesis_lc_state(genesis_state)
                .genesis_st_state(genesis_stake)
                .blocks_per_epoch(blocks_per_epoch)
                .epoch_start_block(epoch_start_block)
                .exit_escrow_period(U256::from(max(
                    blocks_per_epoch * 15 + 100,
                    DEFAULT_EXIT_ESCROW_PERIOD_SECONDS,
                )))
                .multisig_pauser(signer.address())
                .token_name("Espresso".to_string())
                .token_symbol("ESP".to_string())
                .initial_token_supply(self.initial_token_supply.unwrap_or(U256::from(100000u64)))
                .ops_timelock_delay(U256::from(0))
                .ops_timelock_admin(signer.address())
                .ops_timelock_proposers(vec![signer.address()])
                .ops_timelock_executors(vec![signer.address()])
                .safe_exit_timelock_delay(U256::from(10))
                .safe_exit_timelock_admin(signer.address())
                .safe_exit_timelock_proposers(vec![signer.address()])
                .safe_exit_timelock_executors(vec![signer.address()])
                .build()
                .unwrap();

            match stake_table_version {
                StakeTableContractVersion::V1 => {
                    args.deploy_to_stake_table_v1(&mut contracts).await
                },
                StakeTableContractVersion::V2 => {
                    args.deploy_to_stake_table_v2(&mut contracts).await
                },
                StakeTableContractVersion::V3 => {
                    args.deploy_to_stake_table_v3(&mut contracts).await
                },
            }
            .context("failed to deploy contracts")?;

            let stake_table_address = contracts
                .address(Contract::StakeTableProxy)
                .expect("StakeTableProxy address not found");

            StakingTransactions::create(
                l1_url.clone(),
                &deployer,
                stake_table_address,
                network_config.staking_priv_keys(),
                None,
                delegation_config,
            )
            .await
            .expect("stake table setup failed")
            .apply_all()
            .await
            .expect("send all txns failed");

            // enable interval mining with a 1s interval.
            // This ensures that blocks are finalized every second, even when there are no transactions.
            // It's useful for testing stake table updates,
            // which rely on the finalized L1 block number.
            if let Some(anvil) = network_config.anvil() {
                anvil
                    .anvil_set_interval_mining(1)
                    .await
                    .expect("interval mining");
            }

            // Add stake table address to `ChainConfig` (held in state),
            // avoiding overwrite other values. Base fee is set to `0` to avoid
            // unnecessary catchup of `FeeState`.
            let state = self.state[0].clone();
            let chain_config = if let Some(cf) = state.chain_config.resolve() {
                ChainConfig {
                    base_fee: 0.into(),
                    stake_table_contract: Some(stake_table_address),
                    ..cf
                }
            } else {
                ChainConfig {
                    base_fee: 0.into(),
                    stake_table_contract: Some(stake_table_address),
                    ..Default::default()
                }
            };

            let state = ValidatedState {
                chain_config: chain_config.into(),
                ..state
            };
            Ok(self
                .states(std::array::from_fn(|_| state.clone()))
                .contracts(contracts))
        }

        pub fn build(self) -> TestNetworkConfig<{ NUM_NODES }, P, C> {
            TestNetworkConfig {
                state: self.state,
                persistence: self.persistence.unwrap(),
                catchup: self.catchup.unwrap(),
                network_config: self.network_config.unwrap(),
                api_config: self.api_config.unwrap(),
                contracts: self.contracts,
            }
        }
    }

    impl<P: PersistenceOptions, const NUM_NODES: usize> TestNetwork<P, { NUM_NODES }> {
        pub async fn new<C: StateCatchup + 'static>(
            cfg: TestNetworkConfig<{ NUM_NODES }, P, C>,
            upgrade: versions::Upgrade,
        ) -> Self {
            let mut cfg = cfg;
            let mut builder_tasks = Vec::new();

            let chain_config = cfg.state[0].chain_config.resolve();
            if chain_config.is_none() {
                tracing::warn!("Chain config is not set, using default max_block_size");
            }
            let (task, builder_url) = run_legacy_builder::<{ NUM_NODES }>(
                cfg.network_config.builder_port(),
                chain_config.map(|c| *c.max_block_size),
            )
            .await;
            builder_tasks.push(task);
            cfg.network_config
                .set_builder_urls(vec1::vec1![builder_url.clone()]);

            // add default storage if none is provided as query module is now required
            let mut opt = cfg.api_config.clone();
            let temp_dir = if opt.storage_fs.is_none() && opt.storage_sql.is_none() {
                let temp_dir = tempfile::tempdir().unwrap();
                opt = opt.query_fs(
                    Default::default(),
                    crate::persistence::fs::Options::new(temp_dir.path().to_path_buf()),
                );
                Some(temp_dir)
            } else {
                None
            };

            let mut nodes = join_all(
                izip!(cfg.state, cfg.persistence, cfg.catchup)
                    .enumerate()
                    .map(|(i, (state, persistence, state_peers))| {
                        let opt = opt.clone();
                        let cfg = &cfg.network_config;
                        let upgrades_map = cfg.upgrades();
                        async move {
                            if i == 0 {
                                opt.serve(|metrics, consumer, storage| {
                                    let cfg = cfg.clone();
                                    async move {
                                        Ok(cfg
                                            .init_node(
                                                0,
                                                state,
                                                persistence,
                                                Some(state_peers),
                                                storage,
                                                &*metrics,
                                                STAKE_TABLE_CAPACITY_FOR_TEST,
                                                consumer,
                                                upgrade,
                                                upgrades_map,
                                            )
                                            .await)
                                    }
                                    .boxed()
                                })
                                .await
                                .unwrap()
                            } else {
                                cfg.init_node(
                                    i,
                                    state,
                                    persistence,
                                    Some(state_peers),
                                    None,
                                    &NoMetrics,
                                    STAKE_TABLE_CAPACITY_FOR_TEST,
                                    NullEventConsumer,
                                    upgrade,
                                    upgrades_map,
                                )
                                .await
                            }
                        }
                        .boxed()
                    }),
            )
            .await;

            let handle_0 = &nodes[0];

            // Hook the builder(s) up to the event stream from the first node
            for builder_task in builder_tasks {
                builder_task.start(Box::new(
                    handle_0
                        .consensus_handle()
                        .legacy_consensus()
                        .read()
                        .await
                        .event_stream(),
                ));
            }

            for ctx in &nodes {
                ctx.start_consensus().await;
            }

            let server = nodes.remove(0);
            let peers = nodes;

            Self {
                server,
                peers,
                cfg: cfg.network_config,
                temp_dir,
                contracts: cfg.contracts,
            }
        }

        pub async fn stop_consensus(&mut self) {
            self.server.shutdown_consensus().await;

            for ctx in &mut self.peers {
                ctx.shutdown_consensus().await;
            }
        }
    }

    /// Test the status API with custom options.
    ///
    /// The `opt` function can be used to modify the [`Options`] which are used to start the server.
    /// By default, the options are the minimal required to run this test (configuring a port and
    /// enabling the status API). `opt` may add additional functionality (e.g. adding a query module
    /// to test a different initialization path) but should not remove or modify the existing
    /// functionality (e.g. removing the status module or changing the port).
    pub async fn status_test_helper(opt: impl FnOnce(Options) -> Options) {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let options = opt(Options::with_port(port));
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let _network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        client.connect(None).await;

        // The status API is well tested in the query service repo. Here we are just smoke testing
        // that we set it up correctly. Wait for a (non-genesis) block to be sequenced and then
        // check the success rate metrics.
        while client
            .get::<u64>("status/block-height")
            .send()
            .await
            .unwrap()
            <= 1
        {
            sleep(Duration::from_secs(1)).await;
        }
        let success_rate = client
            .get::<f64>("status/success-rate")
            .send()
            .await
            .unwrap();
        // If metrics are populating correctly, we should get a finite number. If not, we might get
        // NaN or infinity due to division by 0.
        assert!(success_rate.is_finite(), "{success_rate}");
        // We know at least some views have been successful, since we finalized a block.
        assert!(success_rate > 0.0, "{success_rate}");
    }

    /// Test the submit API with custom options.
    ///
    /// The `opt` function can be used to modify the [`Options`] which are used to start the server.
    /// By default, the options are the minimal required to run this test (configuring a port and
    /// enabling the submit API). `opt` may add additional functionality (e.g. adding a query module
    /// to test a different initialization path) but should not remove or modify the existing
    /// functionality (e.g. removing the submit module or changing the port).
    pub async fn submit_test_helper(opt: impl FnOnce(Options) -> Options) {
        let txn = Transaction::new(NamespaceId::from(1_u32), vec![1, 2, 3, 4]);

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let options = opt(Options::with_port(port).submit(Default::default()));
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let mut events = network.server.event_stream();

        client.connect(None).await;

        let hash = client
            .post("submit/submit")
            .body_json(&txn)
            .unwrap()
            .send()
            .await
            .unwrap();
        assert_eq!(txn.commit(), hash);

        // Wait for a Decide event containing transaction matching the one we sent
        wait_for_decide_on_handle(&mut events, &txn).await;
    }

    /// Test the state signature API.
    pub async fn state_signature_test_helper(opt: impl FnOnce(Options) -> Options) {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let url = format!("http://localhost:{port}").parse().unwrap();

        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let options = opt(Options::with_port(port));
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        let mut height: u64;
        // Wait for block >=2 appears
        // It's waiting for an extra second to make sure that the signature is generated
        loop {
            height = network.server.decided_leaf().await.height();
            sleep(std::time::Duration::from_secs(1)).await;
            if height >= 2 {
                break;
            }
        }
        // we cannot verify the signature now, because we don't know the stake table
        client
            .get::<LCV3StateSignatureRequestBody>(&format!("state-signature/block/{height}"))
            .send()
            .await
            .unwrap();
    }

    /// Test the catchup API with custom options.
    ///
    /// The `opt` function can be used to modify the [`Options`] which are used to start the server.
    /// By default, the options are the minimal required to run this test (configuring a port and
    /// enabling the catchup API). `opt` may add additional functionality (e.g. adding a query module
    /// to test a different initialization path) but should not remove or modify the existing
    /// functionality (e.g. removing the catchup module or changing the port).
    pub async fn catchup_test_helper(opt: impl FnOnce(Options) -> Options) {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let options = opt(Options::with_port(port));
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        client.connect(None).await;

        // Wait for a few blocks to be decided.
        let mut events = network.server.event_stream();
        loop {
            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = events.next().await.unwrap()
                && leaf_chain
                    .iter()
                    .any(|LeafInfo { leaf, .. }| leaf.block_header().height() > 2)
            {
                break;
            }
        }

        // Stop consensus running on the node so we freeze the decided and undecided states.
        // We'll let it go out of scope here since it's a write lock.
        {
            network.server.shutdown_consensus().await;
        }

        // Undecided fee state: absent account.
        let leaf = network.server.decided_leaf().await;
        let height = leaf.height() + 1;
        let view = leaf.view_number() + 1;
        let res = client
            .get::<AccountQueryData>(&format!(
                "catchup/{height}/{}/account/{:x}",
                view.u64(),
                Address::default()
            ))
            .send()
            .await
            .unwrap();
        assert_eq!(res.balance, U256::ZERO);
        assert_eq!(
            res.proof
                .verify(
                    &network
                        .server
                        .state(view)
                        .await
                        .unwrap()
                        .fee_merkle_tree
                        .commitment()
                )
                .unwrap(),
            U256::ZERO,
        );

        // Undecided block state.
        let res = client
            .get::<BlocksFrontier>(&format!("catchup/{height}/{}/blocks", view.u64()))
            .send()
            .await
            .unwrap();
        let root = &network
            .server
            .state(view)
            .await
            .unwrap()
            .block_merkle_tree
            .commitment();
        BlockMerkleTree::verify(root, root.size() - 1, res)
            .unwrap()
            .unwrap();
    }

    pub async fn spawn_dishonest_peer_catchup_api() -> anyhow::Result<(Url, JoinHandle<()>)> {
        let toml = toml::from_str::<toml::Value>(include_str!("../api/catchup.toml")).unwrap();
        let mut api =
            Api::<(), hotshot_query_service::Error, SequencerApiVersion>::new(toml).unwrap();

        api.get("account", |_req, _state: &()| {
            async move {
                Result::<AccountQueryData, _>::Err(hotshot_query_service::Error::catch_all(
                    StatusCode::BAD_REQUEST,
                    "no account found".to_string(),
                ))
            }
            .boxed()
        })?
        .get("blocks", |_req, _state| {
            async move {
                Result::<BlocksFrontier, _>::Err(hotshot_query_service::Error::catch_all(
                    StatusCode::BAD_REQUEST,
                    "no block found".to_string(),
                ))
            }
            .boxed()
        })?
        .get("chainconfig", |_req, _state| {
            async move {
                Result::<ChainConfig, _>::Ok(ChainConfig {
                    max_block_size: 300.into(),
                    base_fee: 1.into(),
                    fee_recipient: "0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48"
                        .parse()
                        .unwrap(),
                    ..Default::default()
                })
            }
            .boxed()
        })?
        .get("leafchain", |_req, _state| {
            async move {
                Result::<Vec<Leaf2>, _>::Err(hotshot_query_service::Error::catch_all(
                    StatusCode::BAD_REQUEST,
                    "No leafchain found".to_string(),
                ))
            }
            .boxed()
        })?;

        let mut app = App::<_, hotshot_query_service::Error>::with_state(());
        app.with_version(env!("CARGO_PKG_VERSION").parse().unwrap());

        app.register_module::<_, _>("catchup", api).unwrap();

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url: Url = Url::parse(&format!("http://localhost:{port}")).unwrap();

        let handle = spawn({
            let url = url.clone();
            async move {
                let _ = app.serve(url, SequencerApiVersion::instance()).await;
            }
        });

        Ok((url, handle))
    }
}

#[cfg(test)]
mod api_tests {
    use std::{fmt::Debug, marker::PhantomData};

    use committable::Committable;
    use data_source::testing::TestableSequencerDataSource;
    use espresso_types::{
        Header, Leaf2, MOCK_SEQUENCER_VERSIONS, NamespaceId, NamespaceProofQueryData,
        ValidatedState,
        traits::{EventConsumer, PersistenceOptions},
    };
    use futures::{future, stream::StreamExt};
    use hotshot_example_types::node_types::TEST_VERSIONS;
    use hotshot_query_service::availability::{
        AvailabilityDataSource, BlockQueryData, VidCommonQueryData,
    };
    use hotshot_types::{
        data::{
            DaProposal2, EpochNumber, QuorumProposal2, QuorumProposalWrapper, VidCommitment,
            VidDisperseShare, ns_table::parse_ns_table, vid_disperse::AvidMDisperseShare,
        },
        event::LeafInfo,
        message::Proposal,
        simple_certificate::{CertificatePair, QuorumCertificate2},
        traits::{EncodeBytes, signature_key::SignatureKey},
        utils::EpochTransitionIndicator,
        vid::avidm::{AvidMScheme, init_avidm_param},
    };
    use surf_disco::Client;
    use test_helpers::{
        TestNetwork, TestNetworkConfigBuilder, catchup_test_helper, state_signature_test_helper,
        status_test_helper, submit_test_helper,
    };
    use test_utils::reserve_tcp_port;
    use tide_disco::error::ServerError;
    use vbs::version::StaticVersion;

    use super::{update::ApiEventConsumer, *};
    use crate::{
        network,
        persistence::no_storage::NoStorage,
        testing::{TestConfigBuilder, wait_for_decide_on_handle},
    };

    #[rstest_reuse::template]
    #[rstest::rstest]
    #[case(PhantomData::<crate::api::sql::DataSource>)]
    #[case(PhantomData::<crate::api::fs::DataSource>)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    pub fn testable_sequencer_data_source<D: TestableSequencerDataSource>(
        #[case] _d: PhantomData<D>,
    ) {
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub(crate) async fn submit_test_with_query_module<D: TestableSequencerDataSource>(
        _d: PhantomData<D>,
    ) {
        let storage = D::create_storage().await;
        submit_test_helper(|opt| D::options(&storage, opt)).await
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub(crate) async fn status_test_with_query_module<D: TestableSequencerDataSource>(
        _d: PhantomData<D>,
    ) {
        let storage = D::create_storage().await;
        status_test_helper(|opt| D::options(&storage, opt)).await
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub(crate) async fn state_signature_test_with_query_module<D: TestableSequencerDataSource>(
        _d: PhantomData<D>,
    ) {
        let storage = D::create_storage().await;
        state_signature_test_helper(|opt| D::options(&storage, opt)).await
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub(crate) async fn test_namespace_query<D: TestableSequencerDataSource>(_d: PhantomData<D>) {
        // Arbitrary transaction, arbitrary namespace ID
        let ns_id = NamespaceId::from(42_u32);
        let txn = Transaction::new(ns_id, vec![1, 2, 3, 4]);

        // Start query service.
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let storage = D::create_storage().await;
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(D::options(&storage, Options::with_port(port)).submit(Default::default()))
            .network_config(network_config)
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let mut events = network.server.event_stream();

        // Connect client.
        let client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{port}").parse().unwrap());
        client.connect(None).await;

        let hash = client
            .post("submit/submit")
            .body_json(&txn)
            .unwrap()
            .send()
            .await
            .unwrap();
        assert_eq!(txn.commit(), hash);

        // Wait for a Decide event containing transaction matching the one we sent
        let block_height = wait_for_decide_on_handle(&mut events, &txn).await.0 as usize;
        tracing::info!(block_height, "transaction sequenced");

        // Submit a second transaction for range queries.
        let txn2 = Transaction::new(ns_id, vec![5, 6, 7, 8]);
        client
            .post::<Commitment<Transaction>>("submit/submit")
            .body_json(&txn2)
            .unwrap()
            .send()
            .await
            .unwrap();
        let block_height2 = wait_for_decide_on_handle(&mut events, &txn2).await.0 as usize;
        tracing::info!(block_height2, "transaction sequenced");

        // Wait for the query service to update to this block height.
        client
            .socket(&format!("availability/stream/blocks/{block_height2}"))
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .next()
            .await
            .unwrap()
            .unwrap();

        let mut found_txn = false;
        let mut found_empty_block = false;
        for block_num in 0..=block_height {
            let header: Header = client
                .get(&format!("availability/header/{block_num}"))
                .send()
                .await
                .unwrap();
            let ns_query_res: NamespaceProofQueryData = client
                .get(&format!("availability/block/{block_num}/namespace/{ns_id}"))
                .send()
                .await
                .unwrap();

            // Check other means of querying the same proof.
            assert_eq!(
                ns_query_res,
                client
                    .get(&format!(
                        "availability/block/hash/{}/namespace/{ns_id}",
                        header.commit()
                    ))
                    .send()
                    .await
                    .unwrap()
            );
            assert_eq!(
                ns_query_res,
                client
                    .get(&format!(
                        "availability/block/payload-hash/{}/namespace/{ns_id}",
                        header.payload_commitment()
                    ))
                    .send()
                    .await
                    .unwrap()
            );

            // Verify namespace proof if present
            if let Some(ns_proof) = ns_query_res.proof {
                let vid_common: VidCommonQueryData<SeqTypes> = client
                    .get(&format!("availability/vid/common/{block_num}"))
                    .send()
                    .await
                    .unwrap();
                ns_proof
                    .verify(
                        header.ns_table(),
                        &header.payload_commitment(),
                        vid_common.common(),
                    )
                    .unwrap();
            } else {
                // Namespace proof should be present if ns_id exists in ns_table
                assert!(header.ns_table().find_ns_id(&ns_id).is_none());
                assert!(ns_query_res.transactions.is_empty());
            }

            found_empty_block = found_empty_block || ns_query_res.transactions.is_empty();

            for txn in ns_query_res.transactions {
                if txn.commit() == hash {
                    // Ensure that we validate an inclusion proof
                    found_txn = true;
                }
            }
        }
        assert!(found_txn);
        assert!(found_empty_block);

        // Test range query.
        let ns_proofs: Vec<NamespaceProofQueryData> = client
            .get(&format!(
                "availability/block/{block_height}/{}/namespace/{ns_id}",
                block_height2 + 1
            ))
            .send()
            .await
            .unwrap();
        assert_eq!(ns_proofs.len(), block_height2 + 1 - block_height);
        assert_eq!(&ns_proofs[0].transactions, std::slice::from_ref(&txn));
        assert_eq!(
            &ns_proofs[ns_proofs.len() - 1].transactions,
            std::slice::from_ref(&txn2)
        );
        for proof in &ns_proofs[1..ns_proofs.len() - 1] {
            assert_eq!(proof.transactions, &[]);
        }
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub(crate) async fn catchup_test_with_query_module<D: TestableSequencerDataSource>(
        _d: PhantomData<D>,
    ) {
        let storage = D::create_storage().await;
        catchup_test_helper(|opt| D::options(&storage, opt)).await
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub async fn test_non_consecutive_decide_with_failing_event_consumer<D>(_d: PhantomData<D>)
    where
        D: TestableSequencerDataSource + Debug + 'static,
    {
        use hotshot_types::new_protocol::CoordinatorEvent;

        #[derive(Clone, Copy, Debug)]
        struct FailConsumer;

        #[async_trait]
        impl EventConsumer for FailConsumer {
            async fn handle_event(&self, _: &CoordinatorEvent<SeqTypes>) -> anyhow::Result<()> {
                bail!("mock error injection");
            }
        }

        let (pubkey, privkey) = PubKey::generated_from_seed_indexed([0; 32], 1);

        let storage = D::create_storage().await;
        let persistence = D::persistence_options(&storage).create().await.unwrap();
        let data_source: Arc<StorageState<network::Memory, NoStorage, _>> =
            Arc::new(StorageState::new(
                D::create(D::persistence_options(&storage), Default::default(), false)
                    .await
                    .unwrap(),
                ApiState::new(future::pending()),
            ));

        // Create two non-consecutive leaf chains.
        let mut chain1 = vec![];

        let genesis = Leaf2::genesis(
            &Default::default(),
            &NodeState::mock(),
            TEST_VERSIONS.test.base,
        )
        .await;
        let payload = genesis.block_payload().unwrap();
        let payload_bytes_arc = payload.encode();

        let avidm_param = init_avidm_param(2).unwrap();
        let weights = vec![1u32; 2];

        let ns_table = parse_ns_table(payload.byte_len().as_usize(), &payload.ns_table().encode());
        let (payload_commitment, shares) =
            AvidMScheme::ns_disperse(&avidm_param, &weights, &payload_bytes_arc, ns_table).unwrap();

        let mut quorum_proposal = QuorumProposalWrapper::<SeqTypes> {
            proposal: QuorumProposal2::<SeqTypes> {
                block_header: genesis.block_header().clone(),
                view_number: ViewNumber::genesis(),
                justify_qc: QuorumCertificate2::genesis(
                    &ValidatedState::default(),
                    &NodeState::mock(),
                    MOCK_SEQUENCER_VERSIONS,
                )
                .await,
                upgrade_certificate: None,
                view_change_evidence: None,
                next_drb_result: None,
                next_epoch_justify_qc: None,
                epoch: None,
                state_cert: None,
            },
        };
        let mut qc = QuorumCertificate2::genesis(
            &ValidatedState::default(),
            &NodeState::mock(),
            MOCK_SEQUENCER_VERSIONS,
        )
        .await;

        let mut justify_qc = qc.clone();
        for i in 0..5 {
            *quorum_proposal.proposal.block_header.height_mut() = i;
            quorum_proposal.proposal.view_number = ViewNumber::new(i);
            quorum_proposal.proposal.justify_qc = justify_qc;
            let leaf = Leaf2::from_quorum_proposal(&quorum_proposal);
            qc.view_number = leaf.view_number();
            qc.data.leaf_commit = Committable::commit(&leaf);
            justify_qc = qc.clone();
            chain1.push((leaf.clone(), CertificatePair::non_epoch_change(qc.clone())));

            // Include a quorum proposal for each leaf.
            let quorum_proposal_signature =
                PubKey::sign(&privkey, &bincode::serialize(&quorum_proposal).unwrap())
                    .expect("Failed to sign quorum_proposal");
            persistence
                .append_quorum_proposal2(&Proposal {
                    data: quorum_proposal.clone(),
                    signature: quorum_proposal_signature,
                    _pd: Default::default(),
                })
                .await
                .unwrap();

            // Include VID information for each leaf.
            let share: VidDisperseShare<SeqTypes> = AvidMDisperseShare {
                view_number: leaf.view_number(),
                payload_commitment,
                share: shares[0].clone(),
                recipient_key: pubkey,
                epoch: Some(EpochNumber::new(0)),
                target_epoch: Some(EpochNumber::new(0)),
                common: avidm_param.clone(),
            }
            .into();

            persistence
                .append_vid(&share.to_proposal(&privkey).unwrap())
                .await
                .unwrap();

            // Include payload information for each leaf.
            let block_payload_signature =
                PubKey::sign(&privkey, &payload_bytes_arc).expect("Failed to sign block payload");
            let da_proposal_inner = DaProposal2::<SeqTypes> {
                encoded_transactions: payload_bytes_arc.clone(),
                metadata: payload.ns_table().clone(),
                view_number: leaf.view_number(),
                epoch: Some(EpochNumber::new(0)),
                epoch_transition_indicator: EpochTransitionIndicator::NotInTransition,
            };
            let da_proposal = Proposal {
                data: da_proposal_inner,
                signature: block_payload_signature,
                _pd: Default::default(),
            };
            persistence
                .append_da2(&da_proposal, VidCommitment::V1(payload_commitment))
                .await
                .unwrap();
        }
        // Split into two chains.
        let mut chain2 = chain1.split_off(2);
        // Make non-consecutive (i.e. we skip a leaf).
        chain2.remove(0);

        // Decide 2 leaves, but fail in event processing.
        let leaf_chain = chain1
            .iter()
            .map(|(leaf, qc)| (leaf_info(leaf.clone()), qc.clone()))
            .collect::<Vec<_>>();
        tracing::info!("decide with event handling failure");
        persistence
            .append_decided_leaves(
                ViewNumber::new(1),
                leaf_chain.iter().map(|(leaf, qc)| (leaf, qc.clone())),
                None,
                &FailConsumer,
            )
            .await
            .unwrap();

        // Now decide remaining leaves successfully. We should now process a decide event for all
        // the leaves.
        let consumer = ApiEventConsumer::from(data_source.clone());
        let leaf_chain = chain2
            .iter()
            .map(|(leaf, qc)| (leaf_info(leaf.clone()), qc.clone()))
            .collect::<Vec<_>>();
        tracing::info!("decide successfully");
        persistence
            .append_decided_leaves(
                ViewNumber::new(4),
                leaf_chain.iter().map(|(leaf, qc)| (leaf, qc.clone())),
                None,
                &consumer,
            )
            .await
            .unwrap();

        // Check that the leaves were moved to archive storage, along with payload and VID
        // information.
        for (leaf, cert) in chain1.iter().chain(&chain2) {
            tracing::info!(height = leaf.height(), "check archive");
            let qd = data_source.get_leaf(leaf.height() as usize).await.await;
            let stored_leaf: Leaf2 = qd.leaf().clone();
            let stored_qc = qd.qc().clone();
            assert_eq!(&stored_leaf, leaf);
            assert_eq!(&stored_qc, cert.qc());

            data_source
                .get_block(leaf.height() as usize)
                .await
                .try_resolve()
                .ok()
                .unwrap();
            data_source
                .get_vid_common(leaf.height() as usize)
                .await
                .try_resolve()
                .ok()
                .unwrap();

            // Check that all data has been garbage collected for the decided views.
            assert!(
                persistence
                    .load_da_proposal(leaf.view_number())
                    .await
                    .unwrap()
                    .is_none()
            );
            assert!(
                persistence
                    .load_vid_share(leaf.view_number())
                    .await
                    .unwrap()
                    .is_none()
            );
            assert!(
                persistence
                    .load_quorum_proposal(leaf.view_number())
                    .await
                    .is_err()
            );
        }

        // Check that data has _not_ been garbage collected for the missing view.
        assert!(
            persistence
                .load_da_proposal(ViewNumber::new(2))
                .await
                .unwrap()
                .is_some()
        );
        assert!(
            persistence
                .load_vid_share(ViewNumber::new(2))
                .await
                .unwrap()
                .is_some()
        );
        persistence
            .load_quorum_proposal(ViewNumber::new(2))
            .await
            .unwrap();
    }

    #[rstest_reuse::apply(testable_sequencer_data_source)]
    pub async fn test_decide_missing_data<D>(_d: PhantomData<D>)
    where
        D: TestableSequencerDataSource + Debug + 'static,
    {
        use ark_serialize::CanonicalDeserialize;

        let storage = D::create_storage().await;
        let persistence = D::persistence_options(&storage).create().await.unwrap();
        let data_source: Arc<StorageState<network::Memory, NoStorage, _>> =
            Arc::new(StorageState::new(
                D::create(D::persistence_options(&storage), Default::default(), false)
                    .await
                    .unwrap(),
                ApiState::new(future::pending()),
            ));
        let consumer = ApiEventConsumer::from(data_source.clone());

        let mut qc = QuorumCertificate2::genesis(
            &ValidatedState::default(),
            &NodeState::mock(),
            MOCK_SEQUENCER_VERSIONS,
        )
        .await;
        let leaf = Leaf2::genesis(
            &ValidatedState::default(),
            &NodeState::mock(),
            TEST_VERSIONS.test.base,
        )
        .await;

        // Append the genesis leaf. We don't use this for the test, because the update function will
        // automatically fill in the missing data for genesis. We just append this to get into a
        // consistent state to then append the leaf from view 1, which will have missing data.
        tracing::info!(?leaf, ?qc, "decide genesis leaf");
        persistence
            .append_decided_leaves(
                leaf.view_number(),
                [(
                    &leaf_info(leaf.clone()),
                    CertificatePair::non_epoch_change(qc.clone()),
                )],
                None,
                &consumer,
            )
            .await
            .unwrap();

        // Create another leaf, with missing data. We have to use a different payload commitment,
        // otherwise the database will be able to combine the empty payload from the genesis block
        // with this header, and the payload will not actually be missing.
        let mut block_header = leaf.block_header().clone();
        *block_header.height_mut() += 1;
        *block_header.payload_commitment_mut() = VidCommitment::V1(
            CanonicalDeserialize::deserialize_uncompressed_unchecked([1u8; 32].as_slice()).unwrap(),
        );
        let qp = QuorumProposalWrapper {
            proposal: QuorumProposal2 {
                block_header,
                view_number: leaf.view_number() + 1,
                justify_qc: qc.clone(),
                upgrade_certificate: None,
                view_change_evidence: None,
                next_drb_result: None,
                next_epoch_justify_qc: None,
                epoch: None,
                state_cert: None,
            },
        };

        let leaf = Leaf2::from_quorum_proposal(&qp);
        qc.view_number = leaf.view_number();
        qc.data.leaf_commit = Committable::commit(&leaf);

        // Decide a leaf without the corresponding payload or VID.
        tracing::info!(?leaf, ?qc, "append leaf 1");
        persistence
            .append_decided_leaves(
                leaf.view_number(),
                [(
                    &leaf_info(leaf.clone()),
                    CertificatePair::non_epoch_change(qc),
                )],
                None,
                &consumer,
            )
            .await
            .unwrap();

        // Check that we still processed the leaf.
        assert_eq!(leaf, data_source.get_leaf(1).await.await.leaf().clone());
        assert!(data_source.get_vid_common(1).await.is_pending());
        assert!(data_source.get_block(1).await.is_pending());
    }

    fn leaf_info(leaf: Leaf2) -> LeafInfo<SeqTypes> {
        LeafInfo {
            leaf,
            vid_share: None,
            state: Default::default(),
            delta: None,
            state_cert: None,
        }
    }
}

#[cfg(test)]
mod test {
    use std::{
        collections::{HashMap, HashSet},
        time::Duration,
    };

    use ::light_client::{
        consensus::{
            header::HeaderProof,
            leaf::{LeafProof, LeafProofHint},
            payload::PayloadProof,
        },
        testing::{EpochChangeQuorum, LEGACY_VERSION},
    };
    use alloy::{
        eips::BlockId,
        network::EthereumWallet,
        primitives::{Address, U256},
        providers::ProviderBuilder,
    };
    use async_lock::Mutex;
    use committable::{Commitment, Committable};
    use espresso_contract_deployer::{
        Contract, Contracts, builder::DeployerArgsBuilder,
        network_config::light_client_genesis_from_stake_table, upgrade_stake_table_v2,
        upgrade_stake_table_v3,
    };
    use espresso_types::{
        ADVZNamespaceProofQueryData, FeeAmount, Header, L1Client, L1ClientOptions,
        MOCK_SEQUENCER_VERSIONS, NamespaceId, NamespaceProofQueryData, NsProof,
        RegisteredValidatorMap, RewardDistributor, StakeTableState, StateCertQueryDataV1,
        StateCertQueryDataV2, ValidatedState, ValidatorLeaderCounts,
        config::PublicHotShotConfig,
        traits::{MembershipPersistence, NullEventConsumer, PersistenceOptions},
        v0_3::{COMMISSION_BASIS_POINTS, Fetcher, RewardAmount, RewardMerkleProofV1},
        v0_4::{RewardAccountV2, RewardMerkleProofV2},
        validators_from_l1_events,
    };
    use futures::{
        future::{self, join_all, try_join_all},
        stream::{StreamExt, TryStreamExt},
        try_join,
    };
    use hotshot::types::{Event, EventType};
    use hotshot_contract_adapter::{
        reward::RewardClaimInput,
        sol_types::{EspToken, StakeTableV3},
        stake_table::StakeTableContractVersion,
    };
    use hotshot_query_service::{
        availability::{
            BlockQueryData, BlockSummaryQueryData, LeafQueryData, TransactionQueryData,
            VidCommonQueryData,
        },
        data_source::{
            VersionedDataSource,
            sql::Config,
            storage::{SqlStorage, StorageConnectionType},
        },
        explorer::TransactionSummariesResponse,
        types::HeightIndexed,
    };
    use hotshot_types::{
        ValidatorConfig,
        addr::NetAddr,
        data::EpochNumber,
        event::LeafInfo,
        new_protocol::CoordinatorEvent,
        traits::{block_contents::BlockHeader, election::Membership, metrics::NoMetrics},
        utils::epoch_from_block_number,
        x25519,
    };
    use jf_merkle_tree_compat::{
        MerkleTreeScheme,
        prelude::{MerkleProof, Sha3Node},
    };
    use pretty_assertions::assert_matches;
    use rand::seq::SliceRandom;
    use rstest::rstest;
    use staking_cli::{
        demo::DelegationConfig, fetch_commission, update_commission, update_network_config,
    };
    use surf_disco::Client;
    use test_helpers::{
        TestNetwork, TestNetworkConfigBuilder, catchup_test_helper, state_signature_test_helper,
        status_test_helper, submit_test_helper,
    };
    use test_utils::reserve_tcp_port;
    use tide_disco::{
        Error, StatusCode, Url, app::AppHealth, error::ServerError, healthcheck::HealthStatus,
    };
    use tokio::time::sleep;
    use vbs::version::StaticVersion;
    use versions::{
        DRB_AND_HEADER_UPGRADE_VERSION, EPOCH_REWARD_VERSION, EPOCH_VERSION, FEE_VERSION, Upgrade,
        version,
    };

    use self::{
        data_source::testing::TestableSequencerDataSource, options::HotshotEvents,
        sql::DataSource as SqlDataSource,
    };
    use super::*;

    async fn wait_until_block_height(
        client: &Client<ServerError, StaticVersion<0, 1>>,
        endpoint: &str,
        height: u64,
    ) {
        for _retry in 0.. {
            let bh = client
                .get::<u64>(endpoint)
                .send()
                .await
                .expect("block height not found");

            if bh >= height {
                return;
            }
            sleep(Duration::from_secs(3)).await;
        }
    }
    use crate::{
        api::{
            options::Query,
            sql::{impl_testable_data_source::tmp_options, reconstruct_state},
            test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
        },
        catchup::{NullStateCatchup, StatePeers},
        persistence,
        persistence::no_storage,
        testing::{TestConfig, TestConfigBuilder, wait_for_decide_on_handle, wait_for_epochs},
    };

    const POS_V3: Upgrade = Upgrade::trivial(version(0, 3));
    const POS_V4: Upgrade = Upgrade::trivial(version(0, 4));

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_healthcheck() {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);
        let options = Options::with_port(port);
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::<5, _, NullStateCatchup>::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let _network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        client.connect(None).await;
        let health = client.get::<AppHealth>("healthcheck").send().await.unwrap();
        assert_eq!(health.status, HealthStatus::Available);
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn status_test_without_query_module() {
        status_test_helper(|opt| opt).await
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn submit_test_without_query_module() {
        submit_test_helper(|opt| opt).await
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn state_signature_test_without_query_module() {
        state_signature_test_helper(|opt| opt).await
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn catchup_test_without_query_module() {
        catchup_test_helper(|opt| opt).await
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_leaf_only_data_source() {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let storage = SqlDataSource::create_storage().await;
        let options =
            SqlDataSource::leaf_only_ds_options(&storage, Options::with_port(port)).unwrap();

        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let _network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, SequencerApiVersion> = Client::new(url);

        tracing::info!("waiting for blocks");
        client.connect(Some(Duration::from_secs(15))).await;
        // Wait until some blocks have been decided.

        let account = TestConfig::<5>::builder_key().fee_account();

        let _headers = client
            .socket("availability/stream/headers/0")
            .subscribe::<Header>()
            .await
            .unwrap()
            .take(10)
            .try_collect::<Vec<_>>()
            .await
            .unwrap();

        for i in 1..5 {
            let leaf = client
                .get::<LeafQueryData<SeqTypes>>(&format!("availability/leaf/{i}"))
                .send()
                .await
                .unwrap();

            assert_eq!(leaf.height(), i);

            let header = client
                .get::<Header>(&format!("availability/header/{i}"))
                .send()
                .await
                .unwrap();

            assert_eq!(header.height(), i);

            let vid = client
                .get::<VidCommonQueryData<SeqTypes>>(&format!("availability/vid/common/{i}"))
                .send()
                .await
                .unwrap();

            assert_eq!(vid.height(), i);

            client
                .get::<MerkleProof<Commitment<Header>, u64, Sha3Node, 3>>(&format!(
                    "block-state/{i}/{}",
                    i - 1
                ))
                .send()
                .await
                .unwrap();

            client
                .get::<MerkleProof<FeeAmount, FeeAccount, Sha3Node, 256>>(&format!(
                    "fee-state/{}/{}",
                    i + 1,
                    account
                ))
                .send()
                .await
                .unwrap();
        }

        // This would fail even though we have processed atleast 10 leaves
        // this is because light weight nodes only support leaves, headers and VID
        client
            .get::<BlockQueryData<SeqTypes>>("availability/block/1")
            .send()
            .await
            .unwrap_err();
    }

    async fn run_catchup_test(url_suffix: &str) {
        // Start a sequencer network, using the query service for catchup.
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        const NUM_NODES: usize = 5;

        let url: url::Url = format!("http://localhost:{port}{url_suffix}")
            .parse()
            .unwrap();

        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(Options::with_port(port))
            .network_config(TestConfigBuilder::default().build())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![url.clone()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .build();
        let mut network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        // Wait for replica 0 to reach a (non-genesis) decide, before disconnecting it.
        let mut events = network.peers[0].event_stream();
        loop {
            let event = events.next().await.unwrap();
            let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            else {
                continue;
            };
            if leaf_chain[0].leaf.height() > 0 {
                break;
            }
        }

        // Shut down and restart replica 0. We don't just stop consensus and restart it; we fully
        // drop the node and recreate it so it loses all of its temporary state and starts off from
        // genesis. It should be able to catch up by listening to proposals and then rebuild its
        // state from its peers.
        tracing::info!("shutting down node");
        network.peers.remove(0);

        // Wait for a few blocks to pass while the node is down, so it falls behind.
        network
            .server
            .event_stream()
            .filter(|event| {
                future::ready(matches!(
                    event,
                    CoordinatorEvent::LegacyEvent(Event {
                        event: EventType::Decide { .. },
                        ..
                    })
                ))
            })
            .take(3)
            .collect::<Vec<_>>()
            .await;

        tracing::info!("restarting node");
        let node = network
            .cfg
            .init_node(
                1,
                ValidatedState::default(),
                no_storage::Options,
                Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![url],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )),
                None,
                &NoMetrics,
                test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                NullEventConsumer,
                MOCK_SEQUENCER_VERSIONS,
                Default::default(),
            )
            .await;
        let mut events = node.event_stream();

        // Wait for a (non-genesis) block proposed by each node, to prove that the lagging node has
        // caught up and all nodes are in sync.
        let mut proposers = [false; NUM_NODES];
        loop {
            let event = events.next().await.unwrap();
            let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            else {
                continue;
            };
            for LeafInfo { leaf, .. } in leaf_chain.iter().rev() {
                let height = leaf.height();
                let leaf_builder = (leaf.view_number().u64() as usize) % NUM_NODES;
                if height == 0 {
                    continue;
                }

                tracing::info!(
                    "waiting for blocks from {proposers:?}, block {height} is from {leaf_builder}",
                );
                proposers[leaf_builder] = true;
            }

            if proposers.iter().all(|has_proposed| *has_proposed) {
                break;
            }
        }
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_catchup() {
        run_catchup_test("").await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_catchup_v0() {
        run_catchup_test("/v0").await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_catchup_v1() {
        run_catchup_test("/v1").await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_catchup_no_state_peers() {
        // Start a sequencer network, using the query service for catchup.
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        const NUM_NODES: usize = 5;
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(Options::with_port(port))
            .network_config(TestConfigBuilder::default().build())
            .build();
        let mut network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        // Wait for replica 0 to reach a (non-genesis) decide, before disconnecting it.
        let mut events = network.peers[0].event_stream();
        loop {
            let event = events.next().await.unwrap();
            let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            else {
                continue;
            };
            if leaf_chain[0].leaf.height() > 0 {
                break;
            }
        }

        // Shut down and restart replica 0. We don't just stop consensus and restart it; we fully
        // drop the node and recreate it so it loses all of its temporary state and starts off from
        // genesis. It should be able to catch up by listening to proposals and then rebuild its
        // state from its peers.
        tracing::info!("shutting down node");
        network.peers.remove(0);

        // Wait for a few blocks to pass while the node is down, so it falls behind.
        network
            .server
            .event_stream()
            .filter(|event| {
                future::ready(matches!(
                    event,
                    CoordinatorEvent::LegacyEvent(Event {
                        event: EventType::Decide { .. },
                        ..
                    })
                ))
            })
            .take(3)
            .collect::<Vec<_>>()
            .await;

        tracing::info!("restarting node");
        let node = network
            .cfg
            .init_node(
                1,
                ValidatedState::default(),
                no_storage::Options,
                None::<NullStateCatchup>,
                None,
                &NoMetrics,
                test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                NullEventConsumer,
                MOCK_SEQUENCER_VERSIONS,
                Default::default(),
            )
            .await;
        let mut events = node.event_stream();

        // Wait for a (non-genesis) block proposed by each node, to prove that the lagging node has
        // caught up and all nodes are in sync.
        let mut proposers = [false; NUM_NODES];
        loop {
            let event = events.next().await.unwrap();
            let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            else {
                continue;
            };
            for LeafInfo { leaf, .. } in leaf_chain.iter().rev() {
                let height = leaf.height();
                let leaf_builder = (leaf.view_number().u64() as usize) % NUM_NODES;
                if height == 0 {
                    continue;
                }

                tracing::info!(
                    "waiting for blocks from {proposers:?}, block {height} is from {leaf_builder}",
                );
                proposers[leaf_builder] = true;
            }

            if proposers.iter().all(|has_proposed| *has_proposed) {
                break;
            }
        }
    }

    #[ignore]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_catchup_epochs_no_state_peers() {
        // Start a sequencer network, using the query service for catchup.
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        const EPOCH_HEIGHT: u64 = 5;
        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();
        const NUM_NODES: usize = 5;
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(Options::with_port(port))
            .network_config(network_config)
            .build();
        let mut network = TestNetwork::new(config, Upgrade::trivial(EPOCH_VERSION)).await;

        // Wait for replica 0 to decide in the third epoch.
        let mut events = network.peers[0].event_stream();
        loop {
            let event = events.next().await.unwrap();
            let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            else {
                continue;
            };
            tracing::error!("got decide height {}", leaf_chain[0].leaf.height());

            if leaf_chain[0].leaf.height() > EPOCH_HEIGHT * 3 {
                tracing::error!("decided past one epoch");
                break;
            }
        }

        // Shut down and restart replica 0. We don't just stop consensus and restart it; we fully
        // drop the node and recreate it so it loses all of its temporary state and starts off from
        // genesis. It should be able to catch up by listening to proposals and then rebuild its
        // state from its peers.
        tracing::info!("shutting down node");
        network.peers.remove(0);

        // Wait for a few blocks to pass while the node is down, so it falls behind.
        network
            .server
            .event_stream()
            .filter(|event| {
                future::ready(matches!(
                    event,
                    CoordinatorEvent::LegacyEvent(Event {
                        event: EventType::Decide { .. },
                        ..
                    })
                ))
            })
            .take(3)
            .collect::<Vec<_>>()
            .await;

        tracing::error!("restarting node");
        let node = network
            .cfg
            .init_node(
                1,
                ValidatedState::default(),
                no_storage::Options,
                None::<NullStateCatchup>,
                None,
                &NoMetrics,
                test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                NullEventConsumer,
                MOCK_SEQUENCER_VERSIONS,
                Default::default(),
            )
            .await;
        let mut events = node.event_stream();

        // Wait for a (non-genesis) block proposed by each node, to prove that the lagging node has
        // caught up and all nodes are in sync.
        let mut proposers = [false; NUM_NODES];
        loop {
            let event = events.next().await.unwrap();
            let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            else {
                continue;
            };
            for LeafInfo { leaf, .. } in leaf_chain.iter().rev() {
                let height = leaf.height();
                let leaf_builder = (leaf.view_number().u64() as usize) % NUM_NODES;
                if height == 0 {
                    continue;
                }

                tracing::info!(
                    "waiting for blocks from {proposers:?}, block {height} is from {leaf_builder}",
                );
                proposers[leaf_builder] = true;
            }

            if proposers.iter().all(|has_proposed| *has_proposed) {
                break;
            }
        }
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_chain_config_from_instance() {
        // This test uses a ValidatedState which only has the default chain config commitment.
        // The NodeState has the full chain config.
        // Both chain config commitments will match, so the ValidatedState should have the
        // full chain config after a non-genesis block is decided.

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let chain_config: ChainConfig = ChainConfig::default();

        let state = ValidatedState {
            chain_config: chain_config.commit().into(),
            ..Default::default()
        };

        let states = std::array::from_fn(|_| state.clone());

        let config = TestNetworkConfigBuilder::default()
            .api_config(Options::with_port(port))
            .states(states)
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .network_config(TestConfigBuilder::default().build())
            .build();

        let mut network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        // Wait for few blocks to be decided.
        network
            .server
            .event_stream()
            .filter(|event| {
                future::ready(matches!(
                    event,
                    CoordinatorEvent::LegacyEvent(Event {
                        event: EventType::Decide { .. },
                        ..
                    })
                ))
            })
            .take(3)
            .collect::<Vec<_>>()
            .await;

        for peer in &network.peers {
            let state = peer.consensus_handle().decided_state().await.unwrap();

            assert_eq!(state.chain_config.resolve().unwrap(), chain_config)
        }

        network.server.shut_down().await;
        drop(network);
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_chain_config_catchup() {
        // This test uses a ValidatedState with a non-default chain config
        // so it will be different from the NodeState chain config used by the TestNetwork.
        // However, for this test to work, at least one node should have a full chain config
        // to allow other nodes to catch up.

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let cf = ChainConfig {
            max_block_size: 300.into(),
            base_fee: 1.into(),
            ..Default::default()
        };

        // State1 contains only the chain config commitment
        let state1 = ValidatedState {
            chain_config: cf.commit().into(),
            ..Default::default()
        };

        //state 2 contains the full chain config
        let state2 = ValidatedState {
            chain_config: cf.into(),
            ..Default::default()
        };

        let mut states = std::array::from_fn(|_| state1.clone());
        // only one node has the full chain config
        // all the other nodes should do a catchup to get the full chain config from peer 0
        states[0] = state2;

        const NUM_NODES: usize = 5;
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(Options::from(options::Http {
                port,
                max_connections: None,
                axum_port: None,
                tonic_port: None,
            }))
            .states(states)
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .network_config(TestConfigBuilder::default().build())
            .build();

        let mut network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        // Wait for a few blocks to be decided.
        network
            .server
            .event_stream()
            .filter(|event| {
                future::ready(matches!(
                    event,
                    CoordinatorEvent::LegacyEvent(Event {
                        event: EventType::Decide { .. },
                        ..
                    })
                ))
            })
            .take(3)
            .collect::<Vec<_>>()
            .await;

        for peer in &network.peers {
            let state = peer.consensus_handle().decided_state().await.unwrap();

            assert_eq!(state.chain_config.resolve().unwrap(), cf)
        }

        network.server.shut_down().await;
        drop(network);
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_pos_upgrade_view_based() {
        test_upgrade_helper(Upgrade::new(FEE_VERSION, EPOCH_VERSION)).await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_epoch_reward_upgrade() {
        // Use fewer nodes: epoch mode from view 0 is resource-heavy on CI with
        // postgres Docker containers, causing view timeouts and consensus stall.
        test_upgrade_helper_with_nodes::<3>(Upgrade::new(
            versions::DRB_AND_HEADER_UPGRADE_VERSION,
            versions::EPOCH_REWARD_VERSION,
        ))
        .await;
    }

    async fn test_upgrade_helper(upgrade: Upgrade) {
        test_upgrade_helper_with_nodes::<5>(upgrade).await;
    }

    async fn test_upgrade_helper_with_nodes<const NUM_NODES: usize>(upgrade: Upgrade) {
        // wait this number of views beyond the configured first view
        // before asserting anything.
        let wait_extra_views = 10;
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let epoch_start_block = if upgrade.base >= versions::EPOCH_VERSION {
            0
        } else {
            321
        };

        let test_config = TestConfigBuilder::default()
            .epoch_height(200)
            .epoch_start_block(epoch_start_block)
            .set_upgrades(upgrade.target)
            .await
            .build();

        let chain_config_genesis = ValidatedState::default().chain_config.resolve().unwrap();
        let chain_config_upgrade = test_config.get_upgrade_map().chain_config(upgrade.target);
        assert_ne!(chain_config_genesis, chain_config_upgrade);
        tracing::debug!(?chain_config_genesis, ?chain_config_upgrade);

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let mut builder = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(port),
            ))
            .persistences(persistence)
            .catchups(std::array::from_fn(|_| {
                StatePeers::<SequencerApiVersion>::from_urls(
                    vec![format!("http://localhost:{port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .network_config(test_config);

        // When the base version already has epochs, the base chain config must
        // include the stake_table_contract
        if upgrade.base >= versions::EPOCH_VERSION {
            let state = ValidatedState {
                chain_config: chain_config_upgrade.into(),
                ..Default::default()
            };
            builder = builder.states(std::array::from_fn(|_| state.clone()));
        }

        let config = builder.build();

        let mut network = TestNetwork::new(config, upgrade).await;
        let _events = network.server.event_stream();

        let target = upgrade.target;

        // First loop to get an `UpgradeProposal`. Note that the
        // actual upgrade will take several to many subsequent views for
        // voting and finally the actual upgrade.
        // Use the raw HotShot event stream for upgrade testing, since
        // UpgradeProposal events are HotShot-specific and not surfaced
        // through the CoordinatorEvent adapter.
        let mut hotshot_events = network
            .server
            .consensus_handle()
            .legacy_consensus()
            .read()
            .await
            .event_stream();
        let upgrade = loop {
            let event = hotshot_events.next().await.unwrap();
            if let EventType::UpgradeProposal { proposal, .. } = event.event {
                tracing::info!(?proposal, "proposal");
                let upgrade = proposal.data.upgrade_proposal;
                let new_version = upgrade.new_version;
                tracing::info!(?new_version, "upgrade proposal new version");
                assert_eq!(new_version, target);
                break upgrade;
            }
        };

        let wanted_view = upgrade.new_version_first_view + wait_extra_views;
        // Loop until we get the `new_version_first_view`, then test the upgrade.
        loop {
            let event = hotshot_events.next().await.unwrap();
            let view_number = event.view_number;

            tracing::debug!(?view_number, ?upgrade.new_version_first_view, "upgrade_new_view");
            if view_number > wanted_view {
                tracing::info!(?view_number, ?upgrade.new_version_first_view, "passed upgrade view");
                let states =
                    join_all(network.peers.iter().map(|peer| async {
                        peer.consensus_handle().decided_state().await.unwrap()
                    }))
                    .await;
                let leaves = join_all(
                    network
                        .peers
                        .iter()
                        .map(|peer| async { peer.consensus_handle().decided_leaf().await }),
                )
                .await;
                let configs: Vec<ChainConfig> = states
                    .iter()
                    .map(|state| state.chain_config.resolve().unwrap())
                    .collect();

                tracing::info!(?leaves, ?configs, "post upgrade state");
                for config in configs {
                    assert_eq!(config, chain_config_upgrade);
                }
                for leaf in leaves {
                    assert_eq!(leaf.block_header().version(), target);
                }
                break;
            }
            sleep(Duration::from_millis(200)).await;
        }

        network.server.shut_down().await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    pub(crate) async fn test_restart() {
        const NUM_NODES: usize = 5;
        // Initialize nodes.
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let config = TestNetworkConfigBuilder::default()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(port),
            ))
            .persistences(persistence.clone())
            .network_config(TestConfigBuilder::default().build())
            .build();
        let mut network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        // Connect client.
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{port}").parse().unwrap());
        client.connect(None).await;
        tracing::info!(port, "server running");

        // Wait until some blocks have been decided.
        client
            .socket("availability/stream/blocks/0")
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .take(3)
            .collect::<Vec<_>>()
            .await;

        // Shut down the consensus nodes.
        tracing::info!("shutting down nodes");
        network.stop_consensus().await;

        // Get the block height we reached.
        let height = client
            .get::<usize>("status/block-height")
            .send()
            .await
            .unwrap();
        tracing::info!("decided {height} blocks before shutting down");

        // Get the decided chain, so we can check consistency after the restart.
        let chain: Vec<LeafQueryData<SeqTypes>> = client
            .socket("availability/stream/leaves/0")
            .subscribe()
            .await
            .unwrap()
            .take(height)
            .try_collect()
            .await
            .unwrap();
        let decided_view = chain.last().unwrap().leaf().view_number();

        // Get the most recent state, for catchup.

        let state = network.server.decided_state().await.unwrap();
        tracing::info!(?decided_view, ?state, "consensus state");

        // Fully shut down the API servers.
        drop(network);

        // Start up again, resuming from the last decided leaf.
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let config = TestNetworkConfigBuilder::default()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(port),
            ))
            .persistences(persistence)
            .catchups(std::array::from_fn(|_| {
                // Catchup using node 0 as a peer. Node 0 was running the archival state service
                // before the restart, so it should be able to resume without catching up by loading
                // state from storage.
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .network_config(TestConfigBuilder::default().build())
            .build();
        let _network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{port}").parse().unwrap());
        client.connect(None).await;
        tracing::info!(port, "server running");

        // Make sure we can decide new blocks after the restart.
        tracing::info!("waiting for decide, height {height}");
        let new_leaf: LeafQueryData<SeqTypes> = client
            .socket(&format!("availability/stream/leaves/{height}"))
            .subscribe()
            .await
            .unwrap()
            .next()
            .await
            .unwrap()
            .unwrap();
        assert_eq!(new_leaf.height(), height as u64);
        assert_eq!(
            new_leaf.leaf().parent_commitment(),
            chain[height - 1].hash()
        );

        // Ensure the new chain is consistent with the old chain.
        let new_chain: Vec<LeafQueryData<SeqTypes>> = client
            .socket("availability/stream/leaves/0")
            .subscribe()
            .await
            .unwrap()
            .take(height)
            .try_collect()
            .await
            .unwrap();
        assert_eq!(chain, new_chain);
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_fetch_config() {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url: surf_disco::Url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url.clone());

        let options = Options::with_port(port).config(Default::default());
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        client.connect(None).await;

        // Fetch a network config from the API server. The first peer URL is bogus, to test the
        // failure/retry case.
        let peers = StatePeers::<StaticVersion<0, 1>>::from_urls(
            vec!["https://notarealnode.network".parse().unwrap(), url],
            Default::default(),
            Duration::from_secs(2),
            &NoMetrics,
        );

        // Fetch the config from node 1, a different node than the one running the service.
        let validator =
            ValidatorConfig::generated_from_seed_indexed([0; 32], 1, U256::from(1), false);
        let config = peers.fetch_config(validator.clone()).await.unwrap();

        // Check the node-specific information in the recovered config is correct.
        assert_eq!(config.node_index, 1);

        // Check the public information is also correct (with respect to the node that actually
        // served the config, for public keys).
        pretty_assertions::assert_eq!(
            serde_json::to_value(PublicHotShotConfig::from(config.config)).unwrap(),
            serde_json::to_value(PublicHotShotConfig::from(
                network.cfg.hotshot_config().clone()
            ))
            .unwrap()
        );
    }

    async fn run_hotshot_event_streaming_test(url_suffix: &str) {
        let query_service_port =
            reserve_tcp_port().expect("OS should have ephemeral ports available");

        let url = format!("http://localhost:{query_service_port}{url_suffix}")
            .parse()
            .unwrap();

        let client: Client<ServerError, SequencerApiVersion> = Client::new(url);

        let options = Options::with_port(query_service_port).hotshot_events(HotshotEvents);

        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config)
            .build();
        let _network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;

        let mut subscribed_events = client
            .socket("hotshot-events/events")
            .subscribe::<Event<SeqTypes>>()
            .await
            .unwrap();

        let total_count = 5;
        // wait for these events to receive on client 1
        let mut receive_count = 0;
        loop {
            let event = subscribed_events.next().await.unwrap();
            tracing::info!("Received event in hotshot event streaming Client 1: {event:?}");
            receive_count += 1;
            if receive_count > total_count {
                tracing::info!("Client Received at least desired events, exiting loop");
                break;
            }
        }
        assert_eq!(receive_count, total_count + 1);
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_hotshot_event_streaming_v0() {
        run_hotshot_event_streaming_test("/v0").await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_hotshot_event_streaming_v1() {
        run_hotshot_event_streaming_test("/v1").await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_hotshot_event_streaming() {
        run_hotshot_event_streaming_test("").await;
    }

    // TODO when `EPOCH_VERSION` becomes base version we can merge this
    // w/ above test.
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_hotshot_event_streaming_epoch_progression() {
        let epoch_height = 35;
        let wanted_epochs = 4;

        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let query_service_port =
            reserve_tcp_port().expect("OS should have ephemeral ports available");

        let hotshot_url = format!("http://localhost:{query_service_port}")
            .parse()
            .unwrap();

        let client: Client<ServerError, SequencerApiVersion> = Client::new(hotshot_url);
        let options = Options::with_port(query_service_port).hotshot_events(HotshotEvents);

        let config = TestNetworkConfigBuilder::default()
            .api_config(options)
            .network_config(network_config.clone())
            .pos_hook(
                DelegationConfig::VariableAmounts,
                Default::default(),
                POS_V3,
            )
            .await
            .expect("Pos Deployment")
            .build();

        let _network = TestNetwork::new(config, POS_V3).await;

        let mut subscribed_events = client
            .socket("hotshot-events/events")
            .subscribe::<Event<SeqTypes>>()
            .await
            .unwrap();

        let wanted_views = epoch_height * wanted_epochs;

        let mut views = HashSet::new();
        let mut epochs = HashSet::new();
        for _ in 0..=600 {
            let event = subscribed_events.next().await.unwrap();
            let event = event.unwrap();
            let view_number = event.view_number;
            views.insert(view_number.u64());

            if let hotshot::types::EventType::Decide { committing_qc, .. } = event.event {
                assert!(committing_qc.epoch().is_some(), "epochs are live");
                assert!(committing_qc.block_number().is_some());

                let epoch = committing_qc.epoch().unwrap().u64();
                epochs.insert(epoch);

                tracing::debug!(
                    "Got decide: epoch: {:?}, block: {:?} ",
                    epoch,
                    committing_qc.block_number()
                );

                let expected_epoch =
                    epoch_from_block_number(committing_qc.block_number().unwrap(), epoch_height);
                tracing::debug!("expected epoch: {expected_epoch}, qc epoch: {epoch}");

                assert_eq!(expected_epoch, epoch);
            }
            if views.contains(&wanted_views) {
                tracing::info!("Client Received at least desired views, exiting loop");
                break;
            }
        }

        // prevent false positive when we overflow the range
        assert!(views.contains(&wanted_views), "Views are not progressing");
        assert!(
            epochs.contains(&wanted_epochs),
            "Epochs are not progressing"
        );
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_pos_rewards_basic() -> anyhow::Result<()> {
        // Basic PoS rewards test:
        // - Sets up a single validator and a single delegator (the node itself).
        // - Sets the number of blocks in each epoch to 20.
        // - Rewards begin applying from block 41 (i.e., the start of the 3rd epoch).
        // - Since the validator is also the delegator, it receives the full reward.
        // - Verifies that the reward at block height 60 matches the expected amount.
        let epoch_height = 20;

        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 1;
        // Initialize nodes.
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config.clone())
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::VariableAmounts,
                Default::default(),
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, POS_V4).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        // first two epochs will be 1 and 2
        // rewards are distributed starting third epoch
        // third epoch starts from block 40 as epoch height is 20
        // wait for atleast 65 blocks
        let _blocks = client
            .socket("availability/stream/blocks/0")
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .take(65)
            .try_collect::<Vec<_>>()
            .await
            .unwrap();

        let staking_priv_keys = network_config.staking_priv_keys();
        let account = staking_priv_keys[0].signer.clone();
        let address = account.address();

        let block_height = 60;

        let node_state = network.server.node_state();
        let membership = node_state.coordinator.membership();
        let expected_amount = U256::from(20)
            * (membership
                .epoch_block_reward(3.into())
                .expect("block reward is not None"))
            .0;

        // get the validator address balance at block height 60
        let amount = client
            .get::<Option<RewardAmount>>(&format!(
                "reward-state/reward-balance/{block_height}/{address}"
            ))
            .send()
            .await
            .unwrap()
            .unwrap();

        tracing::info!("amount={amount:?}");

        assert_eq!(amount.0, expected_amount, "reward amount don't match");

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_cumulative_pos_rewards() -> anyhow::Result<()> {
        // This test registers 5 validators and multiple delegators for each validator.
        // One of the delegators is also a validator.
        // The test verifies that the cumulative reward at each block height equals
        // the total block reward, which is a constant.

        let epoch_height = 20;

        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 5;
        // Initialize nodes.
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, POS_V4).await;
        let node_state = network.server.node_state();
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        // wait for atleast 75 blocks
        let _blocks = client
            .socket("availability/stream/blocks/0")
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .take(75)
            .try_collect::<Vec<_>>()
            .await
            .unwrap();

        // We are going to check cumulative blocks from block height 40 to 67
        // Basically epoch 3 and epoch 4 as epoch height is 20
        // get all the validators
        let validators = client
            .get::<AuthenticatedValidatorMap>("node/validators/3")
            .send()
            .await
            .expect("failed to get validator");

        // insert all the address in a map
        // We will query the reward-balance at each block height for all the addresses
        // We don't know which validator was the leader because we don't have access to Membership
        let mut addresses = HashSet::new();
        for v in validators.values() {
            addresses.insert(v.account);
            addresses.extend(v.clone().delegators.keys().collect::<Vec<_>>());
        }
        // get all the validators
        let validators = client
            .get::<AuthenticatedValidatorMap>("node/validators/4")
            .send()
            .await
            .expect("failed to get validator");
        for v in validators.values() {
            addresses.insert(v.account);
            addresses.extend(v.clone().delegators.keys().collect::<Vec<_>>());
        }

        let mut prev_cumulative_amount = U256::ZERO;
        // Check Cumulative rewards for epochs 3 (= block height 41 to 59) & 4 (= block height 60 to 67)
        for block in 41..=67 {
            let membership = node_state.coordinator.membership();
            let block_reward = membership
                .epoch_block_reward(epoch_from_block_number(block, epoch_height).into())
                .expect("block reward is not None");

            let mut cumulative_amount = U256::ZERO;
            for address in addresses.clone() {
                let amount = client
                    .get::<Option<RewardAmount>>(&format!(
                        "reward-state/reward-balance/{block}/{address}"
                    ))
                    .send()
                    .await
                    .ok()
                    .flatten();

                if let Some(amount) = amount {
                    tracing::info!("address={address}, amount={amount}");
                    cumulative_amount += amount.0;
                };
            }

            // assert cumulative reward is equal to block reward
            assert_eq!(cumulative_amount - prev_cumulative_amount, block_reward.0);
            tracing::info!("cumulative_amount is correct for block={block}");
            prev_cumulative_amount = cumulative_amount;
        }

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_stake_table_duplicate_events_from_contract() -> anyhow::Result<()> {
        // TODO(abdul): This test currently uses TestNetwork only for contract deployment and for L1 block number.
        // Once the stake table deployment logic is refactored and isolated, TestNetwork here will be unnecessary

        let epoch_height = 20;

        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 5;
        // Initialize nodes.
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let l1_url = network_config.l1_url();
        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                POS_V3,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, POS_V3).await;

        let mut prev_st = None;
        let state = network.server.decided_state().await.unwrap();
        let chain_config = state.chain_config.resolve().expect("resolve chain config");
        let stake_table = chain_config.stake_table_contract.unwrap();

        let l1_client = L1ClientOptions::default()
            .connect(vec![l1_url])
            .expect("failed to connect to l1");

        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let mut headers = client
            .socket("availability/stream/headers/0")
            .subscribe::<Header>()
            .await
            .unwrap();

        let mut target_bh = 0;
        while let Some(header) = headers.next().await {
            let header = header.unwrap();
            println!("got header with height {}", header.height());
            if header.height() == 0 {
                continue;
            }
            let l1_block = header.l1_finalized().expect("l1 block not found");

            let sorted_events = Fetcher::fetch_events_from_contract(
                l1_client.clone(),
                stake_table,
                None,
                l1_block.number(),
            )
            .await?;

            let mut sorted_dedup_removed = sorted_events.clone();
            sorted_dedup_removed.dedup();

            assert_eq!(
                sorted_events.len(),
                sorted_dedup_removed.len(),
                "duplicates found"
            );

            // This also checks if there is a duplicate registration
            let stake_table =
                validators_from_l1_events(sorted_events.into_iter().map(|(_, e)| e)).unwrap();
            if let Some(prev_st) = prev_st {
                assert_eq!(stake_table, prev_st);
            }

            prev_st = Some(stake_table);

            if target_bh == 100 {
                break;
            }

            target_bh = header.height();
        }

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_rewards_v4() -> anyhow::Result<()> {
        // This test verifies PoS reward distribution logic for multiple delegators per validator.
        //
        //  assertions:
        // - No rewards are distributed during the first 2 epochs.
        // - Rewards begin from epoch 3 onward.
        // - Delegator stake sums match the corresponding validator stake.
        // - Reward values match those returned by the reward state API.
        // - Commission calculations are within a small acceptable rounding tolerance.
        // - Ensure that the `total_reward_distributed` field in the block header matches the total block reward distributed
        const EPOCH_HEIGHT: u64 = 20;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 5;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, POS_V4).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        // Wait for the chain to progress beyond epoch 3 so rewards start being distributed.
        let mut events = network.peers[0].event_stream();
        while let Some(event) = events.next().await {
            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            {
                let height = leaf_chain[0].leaf.height();
                tracing::info!("Node 0 decided at height: {height}");
                if height > EPOCH_HEIGHT * 3 {
                    break;
                }
            }
        }

        // Verify that there are no validators for epoch # 1 and epoch # 2
        {
            client
                .get::<AuthenticatedValidatorMap>("node/validators/1")
                .send()
                .await
                .unwrap()
                .is_empty();

            client
                .get::<AuthenticatedValidatorMap>("node/validators/2")
                .send()
                .await
                .unwrap()
                .is_empty();
        }

        // Get the epoch # 3 validators
        let validators = client
            .get::<AuthenticatedValidatorMap>("node/validators/3")
            .send()
            .await
            .expect("validators");

        assert!(!validators.is_empty());

        // Collect addresses to track rewards for all participants.
        let mut addresses = HashSet::new();
        for v in validators.values() {
            addresses.insert(v.account);
            addresses.extend(v.clone().delegators.keys().collect::<Vec<_>>());
        }

        let mut leaves = client
            .socket("availability/stream/leaves/0")
            .subscribe::<LeafQueryData<SeqTypes>>()
            .await
            .unwrap();

        let node_state = network.server.node_state();
        let coordinator = node_state.coordinator;

        let membership = coordinator.membership();

        // Ensure rewards remain zero up for the first two epochs
        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            assert_eq!(header.total_reward_distributed().unwrap().0, U256::ZERO);

            let epoch_number =
                EpochNumber::new(epoch_from_block_number(leaf.height(), EPOCH_HEIGHT));

            assert!(membership.epoch_block_reward(epoch_number).is_none());

            let height = header.height();
            for address in addresses.clone() {
                let amount = client
                    .get::<Option<RewardAmount>>(&format!(
                        "reward-state-v2/reward-balance/{height}/{address}"
                    ))
                    .send()
                    .await
                    .ok()
                    .flatten();
                assert!(amount.is_none(), "amount is not none for block {height}")
            }

            if leaf.height() == EPOCH_HEIGHT * 2 {
                break;
            }
        }

        let mut rewards_map = HashMap::new();
        let mut total_distributed = U256::ZERO;
        let mut epoch_rewards = HashMap::<EpochNumber, U256>::new();

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();

            let header = leaf.header();
            let distributed = header
                .total_reward_distributed()
                .expect("rewards distributed is none");

            let block = leaf.height();
            tracing::info!("verify rewards for block={block:?}");
            let membership = coordinator.membership();
            let epoch_number =
                EpochNumber::new(epoch_from_block_number(leaf.height(), EPOCH_HEIGHT));

            let snapshot = membership.snapshot(epoch_number).expect("snapshot");
            let block_reward = snapshot.epoch_block_reward().unwrap();
            let leader = snapshot.leader(leaf.leaf().view_number()).expect("leader");
            let leader_eth_address = snapshot
                .validator_config(&leader)
                .expect("validator config")
                .account;

            let validators = client
                .get::<AuthenticatedValidatorMap>(&format!("node/validators/{epoch_number}"))
                .send()
                .await
                .expect("validators");

            let leader_validator = validators
                .get(&leader_eth_address)
                .expect("leader not found");

            let distributor =
                RewardDistributor::new(leader_validator.clone(), block_reward, distributed);
            // Verify that the sum of delegator stakes equals the validator's total stake.
            for validator in validators.values() {
                let delegator_stake_sum: U256 = validator.delegators.values().cloned().sum();

                assert_eq!(delegator_stake_sum, validator.stake);
            }

            let computed_rewards = distributor.compute_rewards().expect("reward computation");

            // Validate that the leader's commission is within a 10 wei tolerance of the expected value.
            let total_reward = block_reward.0;
            let leader_commission_basis_points = U256::from(leader_validator.commission);
            let calculated_leader_commission_reward = leader_commission_basis_points
                .checked_mul(total_reward)
                .context("overflow")?
                .checked_div(U256::from(COMMISSION_BASIS_POINTS))
                .context("overflow")?;

            assert!(
                computed_rewards.leader_commission().0 - calculated_leader_commission_reward
                    <= U256::from(10_u64)
            );

            // Aggregate rewards by address (both delegator and leader).
            let leader_commission = *computed_rewards.leader_commission();
            for (address, amount) in computed_rewards.delegators().clone() {
                rewards_map
                    .entry(address)
                    .and_modify(|entry| *entry += amount)
                    .or_insert(amount);
            }

            // add leader commission reward
            rewards_map
                .entry(leader_eth_address)
                .and_modify(|entry| *entry += leader_commission)
                .or_insert(leader_commission);

            // assert that the reward matches to what is in the reward merkle tree
            for (address, calculated_amount) in rewards_map.iter() {
                let mut attempt = 0;
                let amount_from_api = loop {
                    let result = client
                        .get::<Option<RewardAmount>>(&format!(
                            "reward-state-v2/reward-balance/{block}/{address}"
                        ))
                        .send()
                        .await
                        .ok()
                        .flatten();

                    if let Some(amount) = result {
                        break amount;
                    }

                    attempt += 1;
                    if attempt >= 3 {
                        panic!(
                            "Failed to fetch reward amount for address {address} after 3 retries"
                        );
                    }

                    sleep(Duration::from_secs(2)).await;
                };

                assert_eq!(amount_from_api, *calculated_amount);
            }

            // Confirm the header's total distributed field matches the cumulative expected amount.
            total_distributed += block_reward.0;
            assert_eq!(
                header.total_reward_distributed().unwrap().0,
                total_distributed
            );

            // Block reward shouldn't change for the same epoch
            epoch_rewards
                .entry(epoch_number)
                .and_modify(|r| assert_eq!(*r, block_reward.0))
                .or_insert(block_reward.0);

            // Stop the test after verifying 5 full epochs.
            if leaf.height() == EPOCH_HEIGHT * 5 {
                break;
            }
        }

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_epoch_reward_distribution_basic() -> anyhow::Result<()> {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 5;

        const V5: Upgrade = Upgrade::trivial(EPOCH_REWARD_VERSION);

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("No ports free for query service");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(DelegationConfig::MultipleDelegators, Default::default(), V5)
            .await
            .unwrap()
            .build();

        let _network = TestNetwork::new(config, V5).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        // Wait for chain to reach epoch 5
        let height_client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());
        wait_until_block_height(&height_client, "node/block-height", EPOCH_HEIGHT * 5).await;

        let mut leaves = client
            .socket("availability/stream/leaves/0")
            .subscribe::<LeafQueryData<SeqTypes>>()
            .await
            .unwrap();

        // Epochs 1-3: verify no rewards
        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            let total_distributed = header.total_reward_distributed().unwrap();
            assert_eq!(
                total_distributed.0,
                U256::ZERO,
                "epochs 1-3 should have no rewards, height={height}"
            );

            if height == EPOCH_HEIGHT * 3 {
                break;
            }
        }

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            if height == EPOCH_HEIGHT * 4 {
                let total_distributed = header.total_reward_distributed().unwrap();
                assert!(total_distributed.0 > U256::ZERO,);
                break;
            }
        }

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            if height == EPOCH_HEIGHT * 5 {
                let total_distributed = header.total_reward_distributed().unwrap();
                assert!(total_distributed.0 > U256::ZERO,);
                break;
            }
        }

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_epoch_reward_total_distributed_rewards() -> anyhow::Result<()> {
        // Epochs 1-3: No rewards distributed (total_reward_distributed = 0)
        // Epoch 4: Rewards only distributed in the LAST block
        // Epoch 5: All blocks before last have same total as epoch 4 last block,
        //          last block has higher total because of new distribution
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 5;

        const V5: Upgrade = Upgrade::trivial(EPOCH_REWARD_VERSION);

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("No ports free for query service");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(DelegationConfig::MultipleDelegators, Default::default(), V5)
            .await
            .unwrap()
            .build();

        let _network = TestNetwork::new(config, V5).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let height_client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());
        wait_until_block_height(&height_client, "node/block-height", EPOCH_HEIGHT * 5).await;

        let mut leaves = client
            .socket("availability/stream/leaves/0")
            .subscribe::<LeafQueryData<SeqTypes>>()
            .await
            .unwrap();

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            let total_distributed = header.total_reward_distributed().unwrap();
            assert_eq!(total_distributed.0, U256::ZERO,);

            if height == EPOCH_HEIGHT * 3 {
                break;
            }
        }

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            let total_distributed = header.total_reward_distributed().unwrap();

            if height < EPOCH_HEIGHT * 4 {
                assert_eq!(total_distributed.0, U256::ZERO,);
            } else {
                assert!(total_distributed.0 > U256::ZERO,);
                break;
            }
        }

        let epoch4_last_reward = {
            let header = client
                .get::<Header>(&format!("availability/header/{}", EPOCH_HEIGHT * 4))
                .send()
                .await
                .unwrap();
            header.total_reward_distributed().unwrap()
        };

        assert!(
            epoch4_last_reward.0 > U256::ZERO,
            "epoch 4 last block should have positive rewards"
        );

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            let total_distributed = header.total_reward_distributed().unwrap();

            if height < EPOCH_HEIGHT * 5 {
                assert_eq!(total_distributed, epoch4_last_reward,);
            } else {
                assert!(total_distributed.0 > epoch4_last_reward.0,);
                break;
            }
        }

        Ok(())
    }

    // test actual rewards
    // todo: test each account rewards by querying merklized state api
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_reward_state_v2_epoch_distribution() -> anyhow::Result<()> {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 5;
        const NUM_EPOCHS: u64 = 6;
        const V5: Upgrade = Upgrade::trivial(EPOCH_REWARD_VERSION);

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("No ports free for query service");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(DelegationConfig::MultipleDelegators, Default::default(), V5)
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, V5).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let node_state = network.server.node_state();
        let coordinator = node_state.coordinator;

        let mut expected_total_distributed = U256::ZERO;

        let mut leaves = client
            .socket("availability/stream/leaves/0")
            .subscribe::<LeafQueryData<SeqTypes>>()
            .await
            .unwrap();

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();

            let epoch = epoch_from_block_number(height, EPOCH_HEIGHT);

            let is_epoch_last_block = height % EPOCH_HEIGHT == 0;

            if epoch <= 3 {
                continue;
            }

            let header_total_distributed = header
                .total_reward_distributed()
                .expect("total_reward_distributed should exist");

            if is_epoch_last_block {
                let prev_epoch = epoch - 1;
                let prev_epoch_number = EpochNumber::new(prev_epoch);
                let membership = coordinator.membership();
                let prev_block_reward = membership
                    .epoch_block_reward(prev_epoch_number)
                    .expect("epoch block reward should exist");

                let epoch_total = prev_block_reward.0 * U256::from(EPOCH_HEIGHT);
                expected_total_distributed += epoch_total;
            }

            assert_eq!(
                header_total_distributed.0, expected_total_distributed,
                "total_reward_distributed mismatch at height {height}"
            );

            if height >= NUM_EPOCHS * EPOCH_HEIGHT {
                break;
            }
        }

        Ok(())
    }

    /// Verifies that the `leader_counts` array in V5+ headers is correct.
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_epoch_leader_counts() -> anyhow::Result<()> {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 5;
        const NUM_EPOCHS: u64 = 6;
        const V5: Upgrade = Upgrade::trivial(EPOCH_REWARD_VERSION);

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("No ports free for query service");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(DelegationConfig::MultipleDelegators, Default::default(), V5)
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, V5).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let node_state = network.server.node_state();
        let coordinator = node_state.coordinator;

        // Track expected leader counts by address
        let mut expected_counts: HashMap<Address, u16> = HashMap::new();

        let mut leaves = client
            .socket("availability/stream/leaves/0")
            .subscribe::<LeafQueryData<SeqTypes>>()
            .await
            .unwrap();

        while let Some(leaf) = leaves.next().await {
            let leaf = leaf.unwrap();
            let header = leaf.header();
            let height = header.height();
            let epoch = epoch_from_block_number(height, EPOCH_HEIGHT);
            let epoch_number = EpochNumber::new(epoch);

            if epoch <= 2 {
                continue;
            }

            let header_leader_counts = header
                .leader_counts()
                .expect("V5+ header must have leader_counts");

            // Reset counts at the start of a new epoch
            let is_epoch_start = (height - 1) % EPOCH_HEIGHT == 0;
            if is_epoch_start {
                expected_counts.clear();
            }

            // Determine the leader for this block and track by address.
            let view_number = leaf.leaf().view_number();
            let snapshot = coordinator
                .membership()
                .snapshot(epoch_number)
                .expect("committee for epoch_number");
            let leader = snapshot.leader(view_number).expect("leader should exist");
            let leader_address = snapshot
                .validator_config(&leader)
                .expect("leader should have an address")
                .account;

            let validator_leader_counts =
                ValidatorLeaderCounts::new(&snapshot, *header_leader_counts)
                    .expect("ValidatorLeaderCounts should build from header leader_counts");

            *expected_counts.entry(leader_address).or_insert(0) += 1;

            let header_counts: HashMap<Address, u16> = validator_leader_counts
                .active_leaders()
                .map(|(v, count)| (v.account, count))
                .collect();

            assert_eq!(
                header_counts, expected_counts,
                "leader_counts mismatch at height {height} (epoch {epoch})"
            );

            if height % EPOCH_HEIGHT == 0 {
                let total: u16 = expected_counts.values().sum();
                assert_eq!(
                    total, EPOCH_HEIGHT as u16,
                    "total leader_counts at epoch boundary should equal EPOCH_HEIGHT at height \
                     {height}"
                );
            }

            if height >= NUM_EPOCHS * EPOCH_HEIGHT {
                break;
            }
        }

        Ok(())
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_node_stake_table_api(#[case] upgrade: Upgrade) {
        let epoch_height = 20;

        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 2;
        // Initialize nodes.
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                upgrade,
            )
            .await
            .unwrap()
            .build();

        let _network = TestNetwork::new(config, upgrade).await;

        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        // wait for atleast 2 epochs
        let _blocks = client
            .socket("availability/stream/blocks/0")
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .take(40)
            .try_collect::<Vec<_>>()
            .await
            .unwrap();

        for i in 1..=3 {
            let _st = client
                .get::<Vec<PeerConfig<SeqTypes>>>(&format!("node/stake-table/{}", i as u64))
                .send()
                .await
                .expect("failed to get stake table");
        }

        let _st = client
            .get::<StakeTableWithEpochNumber<SeqTypes>>("node/stake-table/current")
            .send()
            .await
            .expect("failed to get stake table");
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_epoch_stake_table_catchup(#[case] upgrade: Upgrade) {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 6;

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        // Initialize storage for each node
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;

        let persistence_options: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        // setup catchup peers
        let catchup_peers = std::array::from_fn(|_| {
            StatePeers::<StaticVersion<0, 1>>::from_urls(
                vec![format!("http://localhost:{port}").parse().unwrap()],
                Default::default(),
                Duration::from_secs(2),
                &NoMetrics,
            )
        });
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(port),
            ))
            .network_config(network_config)
            .persistences(persistence_options.clone())
            .catchups(catchup_peers)
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                upgrade,
            )
            .await
            .unwrap()
            .build();

        let state = config.states()[0].clone();
        let mut network = TestNetwork::new(config, upgrade).await;

        // Wait for the peer 0 (node 1) to advance past three epochs
        let mut events = network.peers[0].event_stream();
        while let Some(event) = events.next().await {
            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            {
                let height = leaf_chain[0].leaf.height();
                tracing::info!("Node 0 decided at height: {height}");
                if height > EPOCH_HEIGHT * 3 {
                    break;
                }
            }
        }

        // Shutdown and remove node 1 to simulate falling behind
        tracing::info!("Shutting down peer 0");
        network.peers.remove(0);

        // Wait for epochs to progress with node 1 offline
        let mut events = network.server.event_stream();
        while let Some(event) = events.next().await {
            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            {
                let height = leaf_chain[0].leaf.height();
                if height > EPOCH_HEIGHT * 7 {
                    break;
                }
            }
        }

        // add node 1 to the network with fresh storage
        let storage = SqlDataSource::create_storage().await;
        let options = <SqlDataSource as TestableSequencerDataSource>::persistence_options(&storage);
        tracing::info!("Restarting peer 0");
        let node = network
            .cfg
            .init_node(
                1,
                state,
                options,
                Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )),
                None,
                &NoMetrics,
                test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                NullEventConsumer,
                upgrade,
                Default::default(),
            )
            .await;

        let coordinator = node.node_state().coordinator;
        let server_node_state = network.server.node_state();
        let server_coordinator = server_node_state.coordinator;
        // Verify that the restarted node catches up for each epoch
        for epoch_num in 1..=7 {
            let epoch = EpochNumber::new(epoch_num);
            let node_em = match coordinator.membership_for_epoch(Some(epoch)) {
                Ok(em) => em,
                Err(_) => coordinator.wait_for_catchup(epoch).await.unwrap(),
            };
            let server_em = match server_coordinator.membership_for_epoch(Some(epoch)) {
                Ok(em) => em,
                Err(_) => server_coordinator.wait_for_catchup(epoch).await.unwrap(),
            };

            println!("have stake table for epoch = {epoch_num}");

            let node_stake_table = HSStakeTable::from_iter(node_em.stake_table());
            let stake_table = HSStakeTable::from_iter(server_em.stake_table());
            println!("asserting stake table for epoch = {epoch_num}");

            assert_eq!(
                node_stake_table, stake_table,
                "Stake table mismatch for epoch {epoch_num}",
            );
        }
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_epoch_stake_table_catchup_stress(#[case] upgrade: Upgrade) {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 6;

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        // Initialize storage for each node
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;

        let persistence_options: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        // setup catchup peers
        let catchup_peers = std::array::from_fn(|_| {
            StatePeers::<StaticVersion<0, 1>>::from_urls(
                vec![format!("http://localhost:{port}").parse().unwrap()],
                Default::default(),
                Duration::from_secs(2),
                &NoMetrics,
            )
        });
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(port),
            ))
            .network_config(network_config)
            .persistences(persistence_options.clone())
            .catchups(catchup_peers)
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                upgrade,
            )
            .await
            .unwrap()
            .build();

        let state = config.states()[0].clone();
        let mut network = TestNetwork::new(config, upgrade).await;

        // Wait for the peer 0 (node 1) to advance past three epochs
        let mut events = network.peers[0].event_stream();
        while let Some(event) = events.next().await {
            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            {
                let height = leaf_chain[0].leaf.height();
                tracing::info!("Node 0 decided at height: {height}");
                if height > EPOCH_HEIGHT * 3 {
                    break;
                }
            }
        }

        // Shutdown and remove node 1 to simulate falling behind
        tracing::info!("Shutting down peer 0");
        network.peers.remove(0);

        // Wait for epochs to progress with node 1 offline
        let mut events = network.server.event_stream();
        while let Some(event) = events.next().await {
            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            {
                let height = leaf_chain[0].leaf.height();
                tracing::info!("Server decided at height: {height}");
                //  until 7 epochs
                if height > EPOCH_HEIGHT * 7 {
                    break;
                }
            }
        }

        // add node 1 to the network with fresh storage
        let storage = SqlDataSource::create_storage().await;
        let options = <SqlDataSource as TestableSequencerDataSource>::persistence_options(&storage);

        tracing::info!("Restarting peer 0");
        let node = network
            .cfg
            .init_node(
                1,
                state,
                options,
                Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )),
                None,
                &NoMetrics,
                test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                NullEventConsumer,
                upgrade,
                Default::default(),
            )
            .await;

        let coordinator = node.node_state().coordinator;

        let server_node_state = network.server.node_state();
        let server_coordinator = server_node_state.coordinator;

        // Trigger catchup for all epochs in quick succession and in random order
        let mut rand_epochs: Vec<_> = (1..=7).collect();
        rand_epochs.shuffle(&mut rand::thread_rng());
        println!("trigger catchup in this order: {rand_epochs:?}");
        for epoch_num in rand_epochs {
            let epoch = EpochNumber::new(epoch_num);
            let _ = coordinator.membership_for_epoch(Some(epoch));
        }

        // Verify that the restarted node catches up for each epoch
        for epoch_num in 1..=7 {
            println!("getting stake table for epoch = {epoch_num}");
            let epoch = EpochNumber::new(epoch_num);
            let node_em = coordinator.wait_for_catchup(epoch).await.unwrap();
            let server_em = match server_coordinator.membership_for_epoch(Some(epoch)) {
                Ok(em) => em,
                Err(_) => server_coordinator.wait_for_catchup(epoch).await.unwrap(),
            };

            println!("have stake table for epoch = {epoch_num}");

            let node_stake_table = HSStakeTable::from_iter(node_em.stake_table());
            let stake_table = HSStakeTable::from_iter(server_em.stake_table());

            println!("asserting stake table for epoch = {epoch_num}");

            assert_eq!(
                node_stake_table, stake_table,
                "Stake table mismatch for epoch {epoch_num}",
            );
        }
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_merklized_state_catchup_on_restart(
        #[case] upgrade: Upgrade,
    ) -> anyhow::Result<()> {
        // This test verifies that a query node can catch up on
        // merklized state after being offline for multiple epochs.
        //
        // Steps:
        // 1. Start a test network with 5 sequencer nodes.
        // 2. Start a separate node with the query module enabled, connected to the network.
        //    - This node stores merklized state
        // 3. Shut down the query node after 1 epoch.
        // 4. Allow the network to progress 3 more epochs (query node remains offline).
        // 5. Restart the query node.
        //    - The node is expected to reconstruct or catch up on its own
        const EPOCH_HEIGHT: u64 = 10;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        tracing::info!("API PORT = {api_port}");
        const NUM_NODES: usize = 5;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port)
                    .catchup(Default::default())
                    .light_client(Default::default()),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                upgrade,
            )
            .await
            .unwrap()
            .build();
        let state = config.states()[0].clone();
        let mut network = TestNetwork::new(config, upgrade).await;

        // Remove peer 0 and restart it with the query module enabled.
        // Adding an additional node to the test network is not straight forward,
        // as the keys have already been initialized in the config above.
        // So, we remove this node and re-add it using the same index.
        network.peers[0].shut_down().await;
        network.peers.remove(0);
        let node_0_storage = &storage[1];
        let node_0_persistence = persistence[1].clone();
        let node_0_port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        tracing::info!("node_0_port {node_0_port}");
        // enable query module with api peers
        let opt = Options::with_port(node_0_port).query_sql(
            Query {
                peers: vec![format!("http://localhost:{api_port}").parse().unwrap()],
                light_client: LightClientOptions {
                    decaf: true,
                    ..Default::default()
                },
                ..Default::default()
            },
            tmp_options(node_0_storage),
        );

        // start the query node so that it builds the merklized state
        let node_0 = opt
            .clone()
            .serve(|metrics, consumer, storage| {
                let cfg = network.cfg.clone();
                let node_0_persistence = node_0_persistence.clone();
                let state = state.clone();
                async move {
                    Ok(cfg
                        .init_node(
                            1,
                            state,
                            node_0_persistence.clone(),
                            Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                                vec![format!("http://localhost:{api_port}").parse().unwrap()],
                                Default::default(),
                                Duration::from_secs(2),
                                &NoMetrics,
                            )),
                            storage,
                            &*metrics,
                            test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                            consumer,
                            upgrade,
                            Default::default(),
                        )
                        .await)
                }
                .boxed()
            })
            .await
            .unwrap();

        let mut events = network.peers[2].event_stream();
        // wait for 1 epoch
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 1).await;

        // shutdown the node for 3 epochs
        drop(node_0);

        // wait for 4 epochs
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 4).await;

        // start the node again.
        tracing::info!("restarting node");
        let node_0 = opt
            .serve(|metrics, consumer, storage| {
                let cfg = network.cfg.clone();
                async move {
                    Ok(cfg
                        .init_node(
                            1,
                            state,
                            node_0_persistence,
                            Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                                vec![format!("http://localhost:{api_port}").parse().unwrap()],
                                Default::default(),
                                Duration::from_secs(2),
                                &NoMetrics,
                            )),
                            storage,
                            &*metrics,
                            test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                            consumer,
                            upgrade,
                            Default::default(),
                        )
                        .await)
                }
                .boxed()
            })
            .await
            .unwrap();

        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{node_0_port}").parse().unwrap());
        client.connect(None).await;

        wait_for_epochs(&mut events, EPOCH_HEIGHT, 6).await;

        let epoch_7_block = EPOCH_HEIGHT * 6 + 1;

        // check that the node's state has reward accounts
        let mut retries = 0;
        loop {
            sleep(Duration::from_secs(1)).await;
            let state = node_0.decided_state().await.unwrap();

            let leaves = if upgrade.base == EPOCH_VERSION {
                // Use legacy tree for V3
                state.reward_merkle_tree_v1.num_leaves()
            } else {
                // Use new tree for V4 and above
                state.reward_merkle_tree_v2.num_leaves()
            };

            if leaves > 0 {
                tracing::info!("Node's state has reward accounts");
                break;
            }

            retries += 1;
            if retries > 120 {
                panic!("max retries reached. failed to catchup reward state");
            }
        }

        retries = 0;
        // check that the node has stored atleast 6 epochs merklized state in persistence
        loop {
            sleep(Duration::from_secs(3)).await;

            let bh = client
                .get::<u64>("block-state/block-height")
                .send()
                .await
                .expect("block height not found");

            tracing::info!("block state: block height={bh}");
            if bh > epoch_7_block {
                break;
            }

            retries += 1;
            if retries > 30 {
                panic!(
                    "max retries reached. block state block height is less than epoch 7 start \
                     block"
                );
            }
        }

        // shutdown consensus to freeze the state
        node_0.shutdown_consensus().await;
        let decided_leaf = node_0.decided_leaf().await;
        let state = node_0.decided_state().await.unwrap();
        tracing::info!(
            height = decided_leaf.height(),
            ?decided_leaf,
            ?state,
            "final state"
        );

        let height = decided_leaf.height();
        let num_leaves = state.block_merkle_tree.num_leaves();
        tracing::info!(height, num_leaves, "checking block merkle tree state");
        state
            .block_merkle_tree
            .lookup(height - 1)
            .expect_ok()
            .unwrap_or_else(|err| {
                panic!(
                    "block state not found ({err:#}):\n{:#?}",
                    state.block_merkle_tree
                )
            });

        Ok(())
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_state_reconstruction(#[case] upgrade: Upgrade) -> anyhow::Result<()> {
        // This test verifies that a query node can successfully reconstruct its state
        // after being shut down from the database
        //
        // Steps:
        // 1. Start a test network with 5 nodes.
        // 2. Add a query node connected to the network.
        // 3. Let the network run until 3 epochs have passed.
        // 4. Shut down the query node.
        // 5. Attempt to reconstruct its state from storage using:
        //    - No fee/reward accounts
        //    - Only fee accounts
        //    - Only reward accounts
        //    - Both fee and reward accounts
        // 6. Assert that the reconstructed state is correct in all scenarios.

        const EPOCH_HEIGHT: u64 = 10;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        tracing::info!("API PORT = {api_port}");
        const NUM_NODES: usize = 5;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port).light_client(Default::default()),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                upgrade,
            )
            .await
            .unwrap()
            .build();
        let state = config.states()[0].clone();
        let mut network = TestNetwork::new(config, upgrade).await;
        // Remove peer 0 and restart it with the query module enabled.
        // Adding an additional node to the test network is not straight forward,
        // as the keys have already been initialized in the config above.
        // So, we remove this node and re-add it using the same index.
        network.peers.remove(0);

        let node_0_storage = &storage[1];
        let node_0_persistence = persistence[1].clone();
        let node_0_port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        tracing::info!("node_0_port {node_0_port}");
        let opt = Options::with_port(node_0_port).query_sql(
            Query {
                peers: vec![format!("http://localhost:{api_port}").parse().unwrap()],
                ..Query::test()
            },
            tmp_options(node_0_storage),
        );
        let node_0 = opt
            .clone()
            .serve(|metrics, consumer, storage| {
                let cfg = network.cfg.clone();
                let node_0_persistence = node_0_persistence.clone();
                let state = state.clone();
                async move {
                    Ok(cfg
                        .init_node(
                            1,
                            state,
                            node_0_persistence.clone(),
                            Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                                vec![format!("http://localhost:{api_port}").parse().unwrap()],
                                Default::default(),
                                Duration::from_secs(2),
                                &NoMetrics,
                            )),
                            storage,
                            &*metrics,
                            test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                            consumer,
                            upgrade,
                            Default::default(),
                        )
                        .await)
                }
                .boxed()
            })
            .await
            .unwrap();

        let mut events = network.peers[2].event_stream();
        // Wait until at least 3 epochs have passed
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 3).await;

        tracing::warn!("shutting down node 0");

        node_0.shutdown_consensus().await;

        let instance = node_0.node_state();
        let state = node_0.decided_state().await.unwrap();
        let fee_accounts = state
            .fee_merkle_tree
            .clone()
            .into_iter()
            .map(|(acct, _)| acct)
            .collect::<Vec<_>>();
        let reward_accounts = match upgrade.base {
            EPOCH_VERSION => state
                .reward_merkle_tree_v1
                .clone()
                .into_iter()
                .map(|(acct, _)| RewardAccountV2::from(acct))
                .collect::<Vec<_>>(),
            DRB_AND_HEADER_UPGRADE_VERSION => state
                .reward_merkle_tree_v2
                .clone()
                .into_iter()
                .map(|(acct, _)| acct)
                .collect::<Vec<_>>(),
            _ => panic!("invalid version"),
        };

        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{node_0_port}").parse().unwrap());
        client.connect(Some(Duration::from_secs(10))).await;

        // wait 3s to be sure that all the
        // transactions have been committed
        sleep(Duration::from_secs(3)).await;

        tracing::info!("getting node block height");
        let node_block_height = client
            .get::<u64>("node/block-height")
            .send()
            .await
            .context("getting Espresso block height")
            .unwrap();

        tracing::info!("node block height={node_block_height}");

        let leaf_query_data = client
            .get::<LeafQueryData<SeqTypes>>(&format!("availability/leaf/{}", node_block_height - 1))
            .send()
            .await
            .context("error getting leaf")
            .unwrap();

        tracing::info!("leaf={leaf_query_data:?}");
        let leaf = leaf_query_data.leaf();
        let to_view = leaf.view_number() + 1;

        let ds = SqlStorage::connect(
            Config::try_from(&node_0_persistence).unwrap(),
            StorageConnectionType::Sequencer,
        )
        .await
        .unwrap();
        let mut tx = ds.read().await?;

        let (state, leaf) = reconstruct_state(
            &instance,
            &ds,
            &mut tx,
            node_block_height - 1,
            to_view,
            &[],
            &[],
        )
        .await
        .unwrap();
        assert_eq!(leaf.view_number(), to_view);
        assert!(
            state
                .block_merkle_tree
                .lookup(node_block_height - 1)
                .expect_ok()
                .is_ok(),
            "inconsistent block merkle tree"
        );

        // Reconstruct fee state
        let (state, leaf) = reconstruct_state(
            &instance,
            &ds,
            &mut tx,
            node_block_height - 1,
            to_view,
            &fee_accounts,
            &[],
        )
        .await
        .unwrap();

        assert_eq!(leaf.view_number(), to_view);
        assert!(
            state
                .block_merkle_tree
                .lookup(node_block_height - 1)
                .expect_ok()
                .is_ok(),
            "inconsistent block merkle tree"
        );

        for account in &fee_accounts {
            state.fee_merkle_tree.lookup(account).expect_ok().unwrap();
        }

        // Reconstruct reward state

        let (state, leaf) = reconstruct_state(
            &instance,
            &ds,
            &mut tx,
            node_block_height - 1,
            to_view,
            &[],
            &reward_accounts,
        )
        .await
        .unwrap();

        match upgrade.base {
            EPOCH_VERSION => {
                for account in reward_accounts.clone() {
                    state
                        .reward_merkle_tree_v1
                        .lookup(RewardAccountV1::from(account))
                        .expect_ok()
                        .unwrap();
                }
            },
            DRB_AND_HEADER_UPGRADE_VERSION => {
                for account in &reward_accounts {
                    state
                        .reward_merkle_tree_v2
                        .lookup(account)
                        .expect_ok()
                        .unwrap();
                }
            },
            _ => panic!("invalid version"),
        };

        assert_eq!(leaf.view_number(), to_view);
        assert!(
            state
                .block_merkle_tree
                .lookup(node_block_height - 1)
                .expect_ok()
                .is_ok(),
            "inconsistent block merkle tree"
        );
        // Reconstruct reward and fee state

        let (state, leaf) = reconstruct_state(
            &instance,
            &ds,
            &mut tx,
            node_block_height - 1,
            to_view,
            &fee_accounts,
            &reward_accounts,
        )
        .await
        .unwrap();

        assert!(
            state
                .block_merkle_tree
                .lookup(node_block_height - 1)
                .expect_ok()
                .is_ok(),
            "inconsistent block merkle tree"
        );
        assert_eq!(leaf.view_number(), to_view);

        match upgrade.base {
            EPOCH_VERSION => {
                for account in reward_accounts.clone() {
                    state
                        .reward_merkle_tree_v1
                        .lookup(RewardAccountV1::from(account))
                        .expect_ok()
                        .unwrap();
                }
            },
            DRB_AND_HEADER_UPGRADE_VERSION => {
                for account in &reward_accounts {
                    state
                        .reward_merkle_tree_v2
                        .lookup(account)
                        .expect_ok()
                        .unwrap();
                }
            },
            _ => panic!("invalid version"),
        };

        for account in &fee_accounts {
            state.fee_merkle_tree.lookup(account).expect_ok().unwrap();
        }

        Ok(())
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_block_reward_api(#[case] upgrade: Upgrade) -> anyhow::Result<()> {
        let epoch_height = 10;

        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 1;
        // Initialize nodes.
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config.clone())
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::VariableAmounts,
                Default::default(),
                upgrade,
            )
            .await
            .unwrap()
            .build();

        let _network = TestNetwork::new(config, upgrade).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let _blocks = client
            .socket("availability/stream/blocks/0")
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .take(3)
            .try_collect::<Vec<_>>()
            .await
            .unwrap();

        let block_reward = client
            .get::<Option<RewardAmount>>("node/block-reward")
            .send()
            .await
            .expect("failed to get block reward")
            .expect("block reward is None");
        tracing::info!("block_reward={block_reward:?}");

        assert!(block_reward.0 > U256::ZERO);

        Ok(())
    }

    /// `chain_id`: None = default (35353, non-mainnet), Some(1) = mainnet
    #[rstest]
    #[case(POS_V4, None)]
    #[case(POS_V4, Some(1u64))]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_token_supply_api(
        #[case] upgrade: Upgrade,
        #[case] chain_id: Option<u64>,
    ) -> anyhow::Result<()> {
        use alloy::primitives::utils::parse_ether;
        use espresso_types::v0_3::ChainConfig;

        let epoch_height = 10;
        let network_config = TestConfigBuilder::default()
            .epoch_height(epoch_height)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 1;
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        // Use the real initial supply (3.59B tokens) so the unlock schedule
        // produces realistic locked/unlocked values in the supply calculations.
        let initial_supply_tokens = U256::from(3_590_000_000u64);
        let initial_supply_wei = parse_ether("3590000000").unwrap();

        let mut builder = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config.clone())
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .initial_token_supply(initial_supply_tokens);

        // Must set states before pos_hook, which preserves chain_id from state[0].
        if let Some(id) = chain_id {
            let state = ValidatedState {
                chain_config: ChainConfig {
                    chain_id: U256::from(id).into(),
                    ..Default::default()
                }
                .into(),
                ..Default::default()
            };
            builder = builder.states(std::array::from_fn(|_| state.clone()));
        }

        let config = builder
            .pos_hook(
                DelegationConfig::VariableAmounts,
                Default::default(),
                upgrade,
            )
            .await
            .unwrap()
            .build();

        let _network = TestNetwork::new(config, upgrade).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let _blocks = client
            .socket("availability/stream/blocks/0")
            .subscribe::<BlockQueryData<SeqTypes>>()
            .await
            .unwrap()
            .take(3)
            .try_collect::<Vec<_>>()
            .await
            .unwrap();

        let minted: String = client
            .get("token/total-minted-supply")
            .send()
            .await
            .expect("total-minted-supply");
        let circ_eth: String = client
            .get("token/circulating-supply-ethereum")
            .send()
            .await
            .expect("circulating-supply-ethereum");
        let circulating: String = client
            .get("token/circulating-supply")
            .send()
            .await
            .expect("circulating-supply");
        tracing::info!(%minted, %circ_eth, %circulating);

        let minted = parse_ether(&minted)?;
        let circ_eth = parse_ether(&circ_eth)?;
        let circ = parse_ether(&circulating)?;

        assert_eq!(minted, initial_supply_wei);
        assert!(circ_eth <= minted);
        assert!(circ >= circ_eth);
        assert!(circ > U256::ZERO);

        if chain_id == Some(1) {
            // Proves the unlock schedule is hooked up: locked > 0 means
            // the mainnet code path ran. Vesting ends ~2032; delete after.
            assert!(circ_eth < minted);
        }

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_scanning_token_contract_initialized_event() -> anyhow::Result<()> {
        use espresso_types::v0_3::ChainConfig;

        let blocks_per_epoch = 10;

        let network_config = TestConfigBuilder::<1>::default()
            .epoch_height(blocks_per_epoch)
            .build();

        let (genesis_state, genesis_stake) = light_client_genesis_from_stake_table(
            &network_config.hotshot_config().hotshot_stake_table(),
            STAKE_TABLE_CAPACITY_FOR_TEST,
        )
        .unwrap();

        let deployer = ProviderBuilder::new()
            .wallet(EthereumWallet::from(network_config.signer().clone()))
            .connect_http(network_config.l1_url().clone());

        let mut contracts = Contracts::new();
        let args = DeployerArgsBuilder::default()
            .deployer(deployer.clone())
            .rpc_url(network_config.l1_url().clone())
            .mock_light_client(true)
            .genesis_lc_state(genesis_state)
            .genesis_st_state(genesis_stake)
            .blocks_per_epoch(blocks_per_epoch)
            .epoch_start_block(1)
            .multisig_pauser(network_config.signer().address())
            .token_name("Espresso".to_string())
            .token_symbol("ESP".to_string())
            .initial_token_supply(U256::from(3590000000u64))
            .ops_timelock_delay(U256::from(0))
            .ops_timelock_admin(network_config.signer().address())
            .ops_timelock_proposers(vec![network_config.signer().address()])
            .ops_timelock_executors(vec![network_config.signer().address()])
            .safe_exit_timelock_delay(U256::from(0))
            .safe_exit_timelock_admin(network_config.signer().address())
            .safe_exit_timelock_proposers(vec![network_config.signer().address()])
            .safe_exit_timelock_executors(vec![network_config.signer().address()])
            .build()
            .unwrap();

        args.deploy_to_stake_table_v3(&mut contracts).await.unwrap();

        let st_addr = contracts
            .address(Contract::StakeTableProxy)
            .expect("StakeTableProxy deployed");

        let l1_url = network_config.l1_url().clone();

        let storage = SqlDataSource::create_storage().await;
        let mut opt = <SqlDataSource as TestableSequencerDataSource>::persistence_options(&storage);
        let persistence = opt.create().await.unwrap();

        let l1_client = L1ClientOptions {
            stake_table_update_interval: Duration::from_secs(7),
            l1_retry_delay: Duration::from_millis(10),
            l1_events_max_block_range: 10000,
            ..Default::default()
        }
        .connect(vec![l1_url])
        .unwrap();
        l1_client.spawn_tasks().await;

        let fetcher = Fetcher::new(
            Arc::new(NullStateCatchup::default()),
            Arc::new(Mutex::new(persistence.clone())),
            l1_client.clone(),
            ChainConfig {
                stake_table_contract: Some(st_addr),
                base_fee: 0.into(),
                ..Default::default()
            },
        );

        let provider = l1_client.provider;
        let stake_table = StakeTableV3::new(st_addr, provider.clone());

        let stake_table_init_block = stake_table
            .initializedAtBlock()
            .block(BlockId::finalized())
            .call()
            .await?
            .to::<u64>();

        tracing::info!("stake table init block = {stake_table_init_block}");

        let token_address = stake_table
            .token()
            .block(BlockId::finalized())
            .call()
            .await
            .context("Failed to get token address")?;

        let token = EspToken::new(token_address, provider.clone());

        let init_log = fetcher
            .scan_token_contract_initialized_event_log(stake_table_init_block, token.clone())
            .await
            .unwrap();

        let init_block = init_log.block_number.context("missing block number")?;
        let init_tx_hash = init_log
            .transaction_hash
            .context("missing transaction hash")?;

        let transfer_logs = token
            .Transfer_filter()
            .from_block(init_block)
            .to_block(init_block)
            .query()
            .await
            .unwrap();

        let (mint_transfer, _) = transfer_logs
            .iter()
            .find(|(transfer, log)| {
                log.transaction_hash == Some(init_tx_hash) && transfer.from == Address::ZERO
            })
            .context("no mint transfer event in init tx")?;

        assert!(mint_transfer.value > U256::ZERO);

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_tx_metadata() {
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let url = format!("http://localhost:{port}").parse().unwrap();
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let storage = SqlDataSource::create_storage().await;
        let network_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::default()
            .api_config(
                SqlDataSource::options(&storage, Options::with_port(port))
                    .submit(Default::default())
                    .explorer(Default::default()),
            )
            .network_config(network_config)
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let mut events = network.server.event_stream();

        client.connect(None).await;

        // Submit a few transactions in different namespaces.
        let namespace_counts = [(101, 1), (102, 2), (103, 3)];
        for (ns, count) in &namespace_counts {
            for i in 0..*count {
                let ns_id = NamespaceId::from(*ns as u64);
                let txn = Transaction::new(ns_id, vec![*ns, i]);
                client
                    .post::<()>("submit/submit")
                    .body_json(&txn)
                    .unwrap()
                    .send()
                    .await
                    .unwrap();
                let (block, _) = wait_for_decide_on_handle(&mut events, &txn).await;

                // Block summary should contain information about the namespace.
                let summary: BlockSummaryQueryData<SeqTypes> = client
                    .get(&format!("availability/block/summary/{block}"))
                    .send()
                    .await
                    .unwrap();
                let ns_info = summary.namespaces();
                assert_eq!(ns_info.len(), 1);
                assert_eq!(ns_info.keys().copied().collect::<Vec<_>>(), vec![ns_id]);
                assert_eq!(ns_info[&ns_id].num_transactions, 1);
                assert_eq!(ns_info[&ns_id].size, txn.size_in_block(true));
            }
        }

        // List transactions in each namespace.
        for (ns, count) in &namespace_counts {
            tracing::info!(ns, "list transactions in namespace");

            let ns_id = NamespaceId::from(*ns as u64);
            let summaries: TransactionSummariesResponse<SeqTypes> = client
                .get(&format!(
                    "explorer/transactions/latest/{count}/namespace/{ns_id}"
                ))
                .send()
                .await
                .unwrap();
            let txs = summaries.transaction_summaries;
            assert_eq!(txs.len(), *count as usize);

            // Check that transactions are listed in descending order.
            for i in 0..*count {
                let summary = &txs[i as usize];
                let expected = Transaction::new(ns_id, vec![*ns, count - i - 1]);
                assert_eq!(summary.rollups, vec![ns_id]);
                assert_eq!(summary.hash, expected.commit());
            }
        }
    }

    use std::time::Instant;

    use rand::thread_rng;

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_aggregator_namespace_endpoints() {
        let mut rng = thread_rng();

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let url = format!("http://localhost:{port}").parse().unwrap();
        tracing::info!("Sequencer URL = {url}");
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let options = Options::with_port(port).submit(Default::default());
        const NUM_NODES: usize = 2;
        // Initialize storage for each node
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;

        let persistence_options: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let network_config = TestConfigBuilder::default().build();

        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(&storage[0], options))
            .network_config(network_config)
            .persistences(persistence_options.clone())
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let mut events = network.server.event_stream();
        let start = Instant::now();
        let mut total_transactions = 0;
        let mut tx_heights = Vec::new();
        let mut sizes = HashMap::new();
        // inserting transactions for some namespaces
        // the number of transactions inserted is equal to namespace number.
        for namespace in 1..=4 {
            for _count in 0..namespace {
                // Generate a random payload length between 4 and 10 bytes
                let payload_len = rng.gen_range(4..=10);
                let payload: Vec<u8> = (0..payload_len).map(|_| rng.r#gen()).collect();

                let txn = Transaction::new(NamespaceId::from(namespace as u32), payload);

                client.connect(None).await;

                let hash = client
                    .post("submit/submit")
                    .body_json(&txn)
                    .unwrap()
                    .send()
                    .await
                    .unwrap();
                assert_eq!(txn.commit(), hash);

                // Wait for a Decide event containing transaction matching the one we sent
                let (height, size) = wait_for_decide_on_handle(&mut events, &txn).await;
                tx_heights.push(height);
                total_transactions += 1;
                *sizes.entry(namespace).or_insert(0) += size;
            }
        }

        let duration = start.elapsed();

        println!("Time elapsed to submit transactions: {duration:?}");

        let last_tx_height = tx_heights.last().unwrap();

        // Decide events fire when consensus decides a block, but the aggregator that backs these
        // endpoints runs as a separate background task. Wait for it to have written rows up to
        // last_tx_height before asserting; otherwise queries can hit a not-yet-aggregated height
        // and 404.
        let aggregator_deadline = Instant::now() + Duration::from_secs(30);
        loop {
            let count = client
                .get::<u64>(&format!("node/transactions/count/{last_tx_height}"))
                .send()
                .await
                .ok();
            if count == Some(total_transactions) {
                break;
            }
            assert!(
                Instant::now() < aggregator_deadline,
                "aggregator did not catch up to height {last_tx_height} (got {count:?}, expected \
                 {total_transactions})"
            );
            sleep(Duration::from_secs(1)).await;
        }

        for namespace in 1..=4 {
            let count = client
                .get::<u64>(&format!("node/transactions/count/namespace/{namespace}"))
                .send()
                .await
                .unwrap();
            assert_eq!(
                count, namespace as u64,
                "Incorrect transaction count for namespace {namespace}: expected {namespace}, got \
                 {count}"
            );

            // check the range endpoint
            let to_endpoint_count = client
                .get::<u64>(&format!(
                    "node/transactions/count/namespace/{namespace}/{last_tx_height}"
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(
                to_endpoint_count, namespace as u64,
                "Incorrect transaction count for range endpoint (to only) for namespace \
                 {namespace}: expected {namespace}, got {to_endpoint_count}"
            );

            // check the range endpoint
            let from_to_endpoint_count = client
                .get::<u64>(&format!(
                    "node/transactions/count/namespace/{namespace}/0/{last_tx_height}"
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(
                from_to_endpoint_count, namespace as u64,
                "Incorrect transaction count for range endpoint (from-to) for namespace \
                 {namespace}: expected {namespace}, got {from_to_endpoint_count}"
            );

            let ns_size = client
                .get::<usize>(&format!("node/payloads/size/namespace/{namespace}"))
                .send()
                .await
                .unwrap();

            let expected_ns_size = *sizes.get(&namespace).unwrap();
            assert_eq!(
                ns_size, expected_ns_size,
                "Incorrect payload size for namespace {namespace}: expected {expected_ns_size}, \
                 got {ns_size}"
            );

            let ns_size_to = client
                .get::<usize>(&format!(
                    "node/payloads/size/namespace/{namespace}/{last_tx_height}"
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(
                ns_size_to, expected_ns_size,
                "Incorrect payload size for namespace {namespace} up to height {last_tx_height}: \
                 expected {expected_ns_size}, got {ns_size_to}"
            );

            let ns_size_from_to = client
                .get::<usize>(&format!(
                    "node/payloads/size/namespace/{namespace}/0/{last_tx_height}"
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(
                ns_size_from_to, expected_ns_size,
                "Incorrect payload size for namespace {namespace} from 0 to height \
                 {last_tx_height}: expected {expected_ns_size}, got {ns_size_from_to}"
            );
        }

        let total_tx_count = client
            .get::<u64>("node/transactions/count")
            .send()
            .await
            .unwrap();
        assert_eq!(
            total_tx_count, total_transactions,
            "Incorrect total transaction count: expected {total_transactions}, got \
             {total_tx_count}"
        );

        let total_payload_size = client
            .get::<usize>("node/payloads/size")
            .send()
            .await
            .unwrap();

        let expected_total_size: usize = sizes.values().copied().sum();
        assert_eq!(
            total_payload_size, expected_total_size,
            "Incorrect total payload size: expected {expected_total_size}, got \
             {total_payload_size}"
        );
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_stream_transactions_endpoint() {
        // This test submits transactions to a sequencer for multiple namespaces,
        // waits for them to be decided, and then verifies that:
        // 1. All transactions appear in the transaction stream.
        // 2. Each namespace-specific transaction stream only includes the transactions of that namespace.

        let mut rng = thread_rng();

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let url = format!("http://localhost:{port}").parse().unwrap();
        tracing::info!("Sequencer URL = {url}");
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

        let options = Options::with_port(port).submit(Default::default());
        const NUM_NODES: usize = 2;
        // Initialize storage for each node
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;

        let persistence_options: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let network_config = TestConfigBuilder::default().build();

        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(&storage[0], options))
            .network_config(network_config)
            .persistences(persistence_options.clone())
            .build();
        let network = TestNetwork::new(config, MOCK_SEQUENCER_VERSIONS).await;
        let mut events = network.server.event_stream();
        let mut all_transactions = HashMap::new();
        let mut namespace_tx: HashMap<_, HashSet<_>> = HashMap::new();

        // Submit transactions to namespaces 1 through 4

        for namespace in 1..=4 {
            for _count in 0..namespace {
                let payload_len = rng.gen_range(4..=10);
                let payload: Vec<u8> = (0..payload_len).map(|_| rng.r#gen()).collect();

                let txn = Transaction::new(NamespaceId::from(namespace as u32), payload);

                client.connect(None).await;

                let hash = client
                    .post("submit/submit")
                    .body_json(&txn)
                    .unwrap()
                    .send()
                    .await
                    .unwrap();
                assert_eq!(txn.commit(), hash);

                // Wait for a Decide event containing transaction matching the one we sent
                wait_for_decide_on_handle(&mut events, &txn).await;
                // Store transaction for later validation

                all_transactions.insert(txn.commit(), txn.clone());
                namespace_tx.entry(namespace).or_default().insert(txn);
            }
        }

        let mut transactions = client
            .socket("availability/stream/transactions/0")
            .subscribe::<TransactionQueryData<SeqTypes>>()
            .await
            .expect("failed to subscribe to transactions endpoint");

        let mut count = 0;
        while let Some(tx) = transactions.next().await {
            let tx = tx.unwrap();
            let expected = all_transactions
                .get(&tx.transaction().commit())
                .expect("txn not found ");
            assert_eq!(tx.transaction(), expected, "invalid transaction");
            count += 1;

            if count == all_transactions.len() {
                break;
            }
        }

        // Validate namespace-specific stream endpoint

        for (namespace, expected_ns_txns) in &namespace_tx {
            let mut api_namespace_txns = client
                .socket(&format!(
                    "availability/stream/transactions/0/namespace/{namespace}",
                ))
                .subscribe::<TransactionQueryData<SeqTypes>>()
                .await
                .unwrap_or_else(|_| {
                    panic!("failed to subscribe to transactions namespace {namespace}")
                });

            let mut received = HashSet::new();

            while let Some(res) = api_namespace_txns.next().await {
                let tx = res.expect("stream error");
                received.insert(tx.transaction().clone());

                if received.len() == expected_ns_txns.len() {
                    break;
                }
            }

            assert_eq!(
                received, *expected_ns_txns,
                "Mismatched transactions for namespace {namespace}"
            );
        }
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_v3_and_v4_reward_tree_updates(#[case] upgrade: Upgrade) -> anyhow::Result<()> {
        // This test checks that the correct merkle tree is updated based on version
        //
        // When the protocol version is v3:
        // - The v3 Merkle tree is updated
        // - The v4 Merkle tree must be empty.
        //
        // When the protocol version is v4:
        // - The v4 Merkle tree is updated
        // - The v3 Merkle tree must be empty.
        const EPOCH_HEIGHT: u64 = 10;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        tracing::info!("API PORT = {api_port}");
        const NUM_NODES: usize = 5;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port).catchup(Default::default()),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                upgrade,
            )
            .await
            .unwrap()
            .build();
        let mut network = TestNetwork::new(config, upgrade).await;

        let mut events = network.peers[2].event_stream();
        // wait for 4 epochs
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 4).await;

        let validated_state = network.server.decided_state().await.unwrap();
        if upgrade.base == EPOCH_VERSION {
            let v1_tree = &validated_state.reward_merkle_tree_v1;
            assert!(v1_tree.num_leaves() > 0, "v1 reward tree tree is empty");
            let v2_tree = &validated_state.reward_merkle_tree_v2;
            assert!(
                v2_tree.num_leaves() == 0,
                "v2 reward tree tree is not empty"
            );
        } else {
            let v1_tree = &validated_state.reward_merkle_tree_v1;
            assert!(
                v1_tree.num_leaves() == 0,
                "v1 reward tree tree is not empty"
            );
            let v2_tree = &validated_state.reward_merkle_tree_v2;
            assert!(v2_tree.num_leaves() > 0, "v2 reward tree tree is empty");
        }

        network.stop_consensus().await;
        Ok(())
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    pub(crate) async fn test_state_cert_query(#[case] upgrade: Upgrade) {
        const TEST_EPOCH_HEIGHT: u64 = 10;
        const TEST_EPOCHS: u64 = 5;

        let network_config = TestConfigBuilder::default()
            .epoch_height(TEST_EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        tracing::info!("API PORT = {api_port}");
        const NUM_NODES: usize = 2;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port).catchup(Default::default()),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                upgrade,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, upgrade).await;
        let mut events = network.server.event_stream();

        // Wait until 5 epochs have passed.
        loop {
            let event = events.next().await.unwrap();
            tracing::info!("Received event from handle: {event:?}");

            if let CoordinatorEvent::LegacyEvent(Event {
                event: EventType::Decide { leaf_chain, .. },
                ..
            }) = event
            {
                println!(
                    "Decide event received: {:?}",
                    leaf_chain.first().unwrap().leaf.height()
                );
                if let Some(first_leaf) = leaf_chain.first() {
                    let height = first_leaf.leaf.height();
                    tracing::info!("Decide event received at height: {height}");

                    if height >= TEST_EPOCHS * TEST_EPOCH_HEIGHT {
                        break;
                    }
                }
            }
        }

        // Connect client.
        let client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());
        client.connect(Some(Duration::from_secs(10))).await;

        // Get the state cert for the epoch 3 to 5
        for i in 3..=TEST_EPOCHS {
            // v2

            let state_query_data_v2 = client
                .get::<StateCertQueryDataV2<SeqTypes>>(&format!("availability/state-cert-v2/{i}"))
                .send()
                .await
                .unwrap();
            let state_cert_v2 = state_query_data_v2.0.clone();
            tracing::info!("state_cert_v2: {state_cert_v2:?}");
            assert_eq!(state_cert_v2.epoch.u64(), i);
            assert_eq!(
                state_cert_v2.light_client_state.block_height,
                i * TEST_EPOCH_HEIGHT - 5
            );
            let block_height = state_cert_v2.light_client_state.block_height;

            let header: Header = client
                .get(&format!("availability/header/{block_height}"))
                .send()
                .await
                .unwrap();

            // verify auth root if the consensus version is v4
            if header.version() == DRB_AND_HEADER_UPGRADE_VERSION {
                let auth_root = state_cert_v2.auth_root;
                let header_auth_root = header.auth_root().unwrap();
                if auth_root.is_zero() || header_auth_root.is_zero() {
                    panic!("auth root shouldn't be zero");
                }

                assert_eq!(auth_root, header_auth_root, "auth root mismatch");
            }

            // v1
            let state_query_data_v1 = client
                .get::<StateCertQueryDataV1<SeqTypes>>(&format!("availability/state-cert/{i}"))
                .send()
                .await
                .unwrap();

            let state_cert_v1 = state_query_data_v1.0.clone();
            tracing::info!("state_cert_v1: {state_cert_v1:?}");
            assert_eq!(state_query_data_v1, state_query_data_v2.into());
        }
    }

    /// Test state certificate catchup functionality by simulating a node that falls behind and needs
    /// to catch up. This test starts a 5-node network with epoch height 10, waits for 3 epochs to
    /// pass, then removes and restarts node 0 with a fresh storage. The
    /// restarted node catches up for the missing state certificates.

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    pub(crate) async fn test_state_cert_catchup(#[case] upgrade: Upgrade) {
        const EPOCH_HEIGHT: u64 = 10;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        tracing::info!("API PORT = {api_port}");
        const NUM_NODES: usize = 5;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port).light_client(Default::default()),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                upgrade,
            )
            .await
            .unwrap()
            .build();
        let state = config.states()[0].clone();
        let mut network = TestNetwork::new(config, upgrade).await;

        let mut events = network.peers[2].event_stream();
        // Wait until at least 5 epochs have passed
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 3).await;

        // Remove peer 0 and restart it with the query module enabled.
        // Adding an additional node to the test network is not straight forward,
        // as the keys have already been initialized in the config above.
        // So, we remove this node and re-add it using the same index.
        network.peers.remove(0);

        let new_storage: hotshot_query_service::data_source::sql::testing::TmpDb =
            SqlDataSource::create_storage().await;
        let new_persistence: persistence::sql::Options =
            <SqlDataSource as TestableSequencerDataSource>::persistence_options(&new_storage);

        let node_0_port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        tracing::info!("node_0_port {node_0_port}");
        let opt = Options::with_port(node_0_port).query_sql(
            Query {
                peers: vec![format!("http://localhost:{api_port}").parse().unwrap()],
                ..Query::test()
            },
            tmp_options(&new_storage),
        );
        let node_0 = opt
            .clone()
            .serve(|metrics, consumer, storage| {
                let cfg = network.cfg.clone();
                let new_persistence = new_persistence.clone();
                let state = state.clone();
                async move {
                    Ok(cfg
                        .init_node(
                            1,
                            state,
                            new_persistence.clone(),
                            Some(StatePeers::<StaticVersion<0, 1>>::from_urls(
                                vec![format!("http://localhost:{api_port}").parse().unwrap()],
                                Default::default(),
                                Duration::from_secs(2),
                                &NoMetrics,
                            )),
                            storage,
                            &*metrics,
                            test_helpers::STAKE_TABLE_CAPACITY_FOR_TEST,
                            consumer,
                            upgrade,
                            Default::default(),
                        )
                        .await)
                }
                .boxed()
            })
            .await
            .unwrap();

        let mut events = node_0.event_stream();
        // Wait until at least 5 epochs have passed
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 5).await;

        let client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{node_0_port}").parse().unwrap());
        client.connect(Some(Duration::from_secs(60))).await;

        for epoch in 3..=5 {
            let state_cert = client
                .get::<StateCertQueryDataV2<SeqTypes>>(&format!(
                    "availability/state-cert-v2/{epoch}"
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(state_cert.0.epoch.u64(), epoch);
        }
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_integration_commission_updates() -> anyhow::Result<()> {
        const NUM_NODES: usize = 3;
        const EPOCH_HEIGHT: u64 = 10;

        // Use version that supports epochs (V3 or V4)
        let versions = POS_V4;

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        // Initialize storage for nodes
        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        // Configure test network with epochs
        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        // Build test network configuration starting with V1 stake table
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config.clone())
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<SequencerApiVersion>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                // We want no new rewards after setting the commission to zero.
                DelegationConfig::NoSelfDelegation,
                StakeTableContractVersion::V1, // upgraded later
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, versions).await;
        let provider = network.cfg.anvil().unwrap();
        let deployer_addr = network.cfg.signer().address();
        let mut contracts = network.contracts.unwrap();
        let st_addr = contracts.address(Contract::StakeTableProxy).unwrap();
        upgrade_stake_table_v2(
            provider,
            L1Client::new(vec![network.cfg.l1_url()])?,
            &mut contracts,
            deployer_addr,
            deployer_addr,
        )
        .await?;

        let mut commissions = vec![];
        for (i, (validator, provider)) in
            network_config.validator_providers().into_iter().enumerate()
        {
            let commission = fetch_commission(provider.clone(), st_addr, validator).await?;
            let new_commission = match i {
                0 => 0u16,
                1 => commission.to_evm() + 500u16,
                2 => commission.to_evm() - 100u16,
                _ => unreachable!(),
            }
            .try_into()?;
            commissions.push((validator, commission, new_commission));
            tracing::info!(%validator, %commission, %new_commission, "Update commission");
            update_commission(provider, st_addr, new_commission)
                .await?
                .get_receipt()
                .await?;
        }

        // wait until new stake table takes effect
        let current_epoch = network.peers[0]
            .decided_leaf()
            .await
            .epoch(EPOCH_HEIGHT)
            .unwrap();
        let target_epoch = current_epoch.u64() + 3;
        println!("target epoch for new stake table: {target_epoch}");
        let mut events = network.peers[0].event_stream();
        wait_for_epochs(&mut events, EPOCH_HEIGHT, target_epoch).await;

        // the last epoch with the old commissions
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());
        let validators = client
            .get::<AuthenticatedValidatorMap>(&format!("node/validators/{}", target_epoch - 1))
            .send()
            .await
            .expect("validators");
        assert!(!validators.is_empty());
        for (val, old_comm, _) in commissions.clone() {
            assert_eq!(validators.get(&val).unwrap().commission, old_comm.to_evm());
        }

        // the first epoch with the new commissions
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());
        let validators = client
            .get::<AuthenticatedValidatorMap>(&format!("node/validators/{target_epoch}"))
            .send()
            .await
            .expect("validators");
        assert!(!validators.is_empty());
        for (val, _, new_comm) in commissions.clone() {
            assert_eq!(validators.get(&val).unwrap().commission, new_comm.to_evm());
        }

        let last_block_with_old_commissions = EPOCH_HEIGHT * (target_epoch - 1);
        let block_with_new_commissions = EPOCH_HEIGHT * target_epoch;
        let mut new_amounts = vec![];
        for (val, ..) in commissions {
            let before = client
                .get::<Option<RewardAmount>>(&format!(
                    "reward-state-v2/reward-balance/{last_block_with_old_commissions}/{val}"
                ))
                .send()
                .await?
                .unwrap();
            let after = client
                .get::<Option<RewardAmount>>(&format!(
                    "reward-state-v2/reward-balance/{block_with_new_commissions}/{val}"
                ))
                .send()
                .await?
                .unwrap();
            new_amounts.push(after - before);
        }

        let tolerance = U256::from(10 * EPOCH_HEIGHT).into();
        // validator zero got new new rewards except remainders
        assert!(new_amounts[0] < tolerance);

        // other validators are still receiving rewards
        assert!(new_amounts[1] + new_amounts[2] > tolerance);

        Ok(())
    }

    /// Start on StakeTable V2, upgrade to V3, call `updateNetworkConfig` on one
    /// validator, and verify the indexer surfaces the new x25519 key and p2p
    /// address in the validator map.
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_integration_update_fast_finality_network_config() -> anyhow::Result<()> {
        const NUM_NODES: usize = 3;
        const EPOCH_HEIGHT: u64 = 10;

        let versions = POS_V4;
        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config.clone())
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<SequencerApiVersion>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                StakeTableContractVersion::V2,
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, versions).await;
        let provider = network.cfg.anvil().unwrap();
        let mut contracts = network.contracts.unwrap();
        let st_addr = contracts.address(Contract::StakeTableProxy).unwrap();

        upgrade_stake_table_v3(provider, &mut contracts).await?;

        let (validator, validator_provider) = network_config
            .validator_providers()
            .into_iter()
            .next()
            .unwrap();
        let x25519_key = x25519::Keypair::generate().unwrap().public_key();
        let p2p_addr: NetAddr = "127.0.0.1:9000".parse().unwrap();
        update_network_config(validator_provider, st_addr, x25519_key, p2p_addr.clone())
            .await?
            .get_receipt()
            .await?;

        let current_epoch = network.peers[0]
            .decided_leaf()
            .await
            .epoch(EPOCH_HEIGHT)
            .unwrap();
        let target_epoch = current_epoch.u64() + 3;
        let mut events = network.peers[0].event_stream();
        wait_for_epochs(&mut events, EPOCH_HEIGHT, target_epoch).await;

        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());
        let validators = client
            .get::<AuthenticatedValidatorMap>(&format!("node/validators/{target_epoch}"))
            .send()
            .await
            .expect("validators");
        let v = validators.get(&validator).expect("validator present");
        assert_eq!(v.x25519_key, Some(x25519_key));
        assert_eq!(v.p2p_addr, Some(p2p_addr));

        Ok(())
    }

    async fn compare_endpoints(
        http: &reqwest::Client,
        api_port: u16,
        axum_port: u16,
        path: &str,
    ) -> anyhow::Result<()> {
        let tide: serde_json::Value = http
            .get(format!("http://localhost:{api_port}/v1/{path}"))
            .send()
            .await?
            .json()
            .await?;
        let axum: serde_json::Value = http
            .get(format!("http://localhost:{axum_port}/v1/{path}"))
            .send()
            .await?
            .json()
            .await?;
        assert_eq!(tide, axum, "v1/{path}: tide and axum v1 responses differ");
        Ok(())
    }

    /// Assert both tide-disco and the Axum endpoint return the same HTTP error status code.
    async fn compare_error_endpoints(
        http: &reqwest::Client,
        api_port: u16,
        axum_port: u16,
        path: &str,
        expected_status: u16,
    ) -> anyhow::Result<()> {
        let tide_status = http
            .get(format!("http://localhost:{api_port}/v1/{path}"))
            .send()
            .await?
            .status()
            .as_u16();
        let axum_status = http
            .get(format!("http://localhost:{axum_port}/v1/{path}"))
            .send()
            .await?
            .status()
            .as_u16();
        assert_eq!(
            tide_status, expected_status,
            "v1/{path}: tide should return {expected_status}, got {tide_status}"
        );
        assert_eq!(
            axum_status, expected_status,
            "v1/{path}: axum should return {expected_status}, got {axum_status}"
        );
        Ok(())
    }

    /// Connect to both tide-disco and axum WebSocket endpoints, collect up to 10 messages each,
    /// and assert that at least 2 messages appear in both streams.
    async fn compare_ws_endpoints(api_port: u16, axum_port: u16, path: &str) -> anyhow::Result<()> {
        use std::{collections::HashSet, time::Duration};

        use futures::StreamExt as _;
        use tokio::time::timeout;
        use tokio_tungstenite::{connect_async, tungstenite::Message};

        async fn collect_messages(port: u16, path: &str) -> anyhow::Result<Vec<serde_json::Value>> {
            let url = format!("ws://localhost:{port}/v1/{path}");
            let (mut ws, _) = connect_async(&url).await?;
            let mut messages = Vec::new();
            while messages.len() < 10 {
                match timeout(Duration::from_millis(500), ws.next()).await {
                    Ok(Some(Ok(Message::Text(text)))) => {
                        if let Ok(v) = serde_json::from_str::<serde_json::Value>(&text) {
                            messages.push(v);
                        }
                    },
                    _ => break,
                }
            }
            Ok(messages)
        }

        let (tide_msgs, axum_msgs) = tokio::join!(
            collect_messages(api_port, path),
            collect_messages(axum_port, path)
        );
        let tide_msgs = tide_msgs?;
        let axum_msgs = axum_msgs?;

        let tide_set: HashSet<String> = tide_msgs.iter().map(|v| v.to_string()).collect();
        let common = axum_msgs
            .iter()
            .filter(|v| tide_set.contains(&v.to_string()))
            .count();

        assert!(
            common >= 2,
            "v1/{path}: expected ≥2 messages in common between tide ({} msgs) and axum ({} msgs), \
             got {common}",
            tide_msgs.len(),
            axum_msgs.len(),
        );
        Ok(())
    }

    #[rstest]
    #[case(POS_V3)]
    #[case(POS_V4)]
    #[test_log::test]
    fn test_reward_proof_endpoint(#[case] upgrade: Upgrade) {
        let test = async move {
            const EPOCH_HEIGHT: u64 = 10;
            const NUM_NODES: usize = 5;

            let network_config = TestConfigBuilder::default()
                .epoch_height(EPOCH_HEIGHT)
                .build();

            let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");
            let axum_port = reserve_tcp_port().expect("OS should have ephemeral ports available");
            println!("API PORT = {api_port}");
            println!("AXUM PORT = {axum_port}");

            let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
            let persistence: [_; NUM_NODES] = storage
                .iter()
                .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
                .collect::<Vec<_>>()
                .try_into()
                .unwrap();

            let mut api_opts = Options::with_port(api_port).catchup(Default::default());
            api_opts.http.axum_port = Some(axum_port);

            let config = TestNetworkConfigBuilder::with_num_nodes()
                .api_config(SqlDataSource::options(&storage[0], api_opts))
                .network_config(network_config.clone())
                .persistences(persistence.clone())
                .catchups(std::array::from_fn(|_| {
                    StatePeers::<StaticVersion<0, 1>>::from_urls(
                        vec![format!("http://localhost:{api_port}").parse().unwrap()],
                        Default::default(),
                        Duration::from_secs(2),
                        &NoMetrics,
                    )
                }))
                .pos_hook(
                    DelegationConfig::MultipleDelegators,
                    hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                    upgrade,
                )
                .await
                .unwrap()
                .build();

            let mut network = TestNetwork::new(config, upgrade).await;

            // wait for 4 epochs
            let mut events = network.server.event_stream();
            wait_for_epochs(&mut events, EPOCH_HEIGHT, 4).await;

            let url = format!("http://localhost:{api_port}").parse().unwrap();
            let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);

            let validated_state = network.server.decided_state().await.unwrap();
            let decided_leaf = network.server.decided_leaf().await;
            let height = decided_leaf.height();

            // validate proof returned from the api
            if upgrade.base == EPOCH_VERSION {
                // V1 case — axum only implements the v2 reward tree, so no axum comparison here
                wait_until_block_height(&client, "reward-state/block-height", height).await;

                network.stop_consensus().await;

                for (address, _) in validated_state.reward_merkle_tree_v1.iter() {
                    let (_, expected_proof) = validated_state
                        .reward_merkle_tree_v1
                        .lookup(*address)
                        .expect_ok()
                        .unwrap();

                    let res = client
                        .get::<RewardAccountQueryDataV1>(&format!(
                            "reward-state/proof/{height}/{address}"
                        ))
                        .send()
                        .await
                        .unwrap();

                    match res.proof.proof {
                        RewardMerkleProofV1::Presence(p) => {
                            assert_eq!(
                                p, expected_proof,
                                "Proof mismatch for V1 at {height}, addr={address}"
                            );
                        },
                        other => panic!(
                            "Expected Present proof for V1 at {height}, addr={address}, got \
                             {other:?}"
                        ),
                    }
                }
            } else {
                // V2 case

                // Submit two transactions to the same namespace in separate blocks
                // so the namespace-filtered WS stream produces ≥2 messages.
                // Submitting both at once risks the builder batching them into a
                // single block; submitting sequentially (wait between) guarantees
                // different blocks so the second wait_for_decide_on_handle doesn't
                // hang looking for an event that was already consumed by the first.
                let avail_ns = NamespaceId::from(42_u32);
                let avail_tx = Transaction::new(avail_ns, vec![1, 2, 3]);
                network
                    .server
                    .submit_transaction(avail_tx.clone())
                    .await
                    .unwrap();
                let (avail_block, _) = wait_for_decide_on_handle(&mut events, &avail_tx).await;

                // Submit the second transaction only after the first is decided,
                // ensuring it lands in a strictly later block.
                let avail_tx2 = Transaction::new(avail_ns, vec![4, 5, 6]);
                network
                    .server
                    .submit_transaction(avail_tx2.clone())
                    .await
                    .unwrap();
                wait_for_decide_on_handle(&mut events, &avail_tx2).await;

                wait_until_block_height(&client, "reward-state-v2/block-height", height).await;
                // Wait for the availability query service to index avail_block.
                wait_until_block_height(&client, "node/block-height", avail_block).await;

                network.stop_consensus().await;

                let http = reqwest::Client::new();

                for (address, _) in validated_state.reward_merkle_tree_v2.iter() {
                    let (_, expected_proof) = validated_state
                        .reward_merkle_tree_v2
                        .lookup(*address)
                        .expect_ok()
                        .unwrap();

                    let res = client
                        .get::<RewardAccountQueryDataV2>(&format!(
                            "reward-state-v2/proof/{height}/{address}"
                        ))
                        .send()
                        .await
                        .unwrap();

                    match res.proof.proof.clone() {
                        RewardMerkleProofV2::Presence(p) => {
                            assert_eq!(
                                p, expected_proof,
                                "Proof mismatch for V2 at {height}, addr={address}"
                            );
                        },
                        other => panic!(
                            "Expected Present proof for V2 at {height}, addr={address}, got \
                             {other:?}"
                        ),
                    }

                    let reward_claim_input = client
                        .get::<RewardClaimInput>(&format!(
                            "reward-state-v2/reward-claim-input/{height}/{address}"
                        ))
                        .send()
                        .await
                        .unwrap();

                    assert_eq!(reward_claim_input, res.to_reward_claim_input()?);

                    // Both servers share the same underlying SQL data source; compare responses
                    // for each per-address endpoint under reward-state-v2.
                    compare_endpoints(
                        &http,
                        api_port,
                        axum_port,
                        &format!("reward-state-v2/proof/{height}/{address}"),
                    )
                    .await?;
                    compare_endpoints(
                        &http,
                        api_port,
                        axum_port,
                        &format!("reward-state-v2/reward-claim-input/{height}/{address}"),
                    )
                    .await?;
                    compare_endpoints(
                        &http,
                        api_port,
                        axum_port,
                        &format!("reward-state-v2/reward-balance/{height}/{address}"),
                    )
                    .await?;
                    compare_endpoints(
                        &http,
                        api_port,
                        axum_port,
                        &format!("reward-state-v2/proof/latest/{address}"),
                    )
                    .await?;
                    compare_endpoints(
                        &http,
                        api_port,
                        axum_port,
                        &format!("reward-state-v2/reward-balance/latest/{address}"),
                    )
                    .await?;
                }

                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("reward-state-v2/reward-amounts/{height}/0/1000"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("reward-state-v2/reward-merkle-tree-v2/{height}"),
                )
                .await?;

                // Availability v1 parity: verify the axum v1 routes return the same JSON as tide.

                // Namespace proof by height
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/{avail_block}/namespace/{avail_ns}"),
                )
                .await?;

                // Namespace proof by block hash and payload hash
                let avail_header: Header = client
                    .get(&format!("availability/header/{avail_block}"))
                    .send()
                    .await
                    .unwrap();
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!(
                        "availability/block/hash/{}/namespace/{avail_ns}",
                        avail_header.commit()
                    ),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!(
                        "availability/block/payload-hash/{}/namespace/{avail_ns}",
                        avail_header.payload_commitment()
                    ),
                )
                .await?;

                // Namespace proof range
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!(
                        "availability/block/{avail_block}/{}/namespace/{avail_ns}",
                        avail_block + 1
                    ),
                )
                .await?;

                // State certificate parity (epoch 1 is complete after 4 epochs)
                compare_endpoints(&http, api_port, axum_port, "availability/state-cert/1").await?;
                compare_endpoints(&http, api_port, axum_port, "availability/state-cert-v2/1")
                    .await?;

                // HotShot availability parity: leaf, header, block, payload, vid/common, etc.
                let avail_leaf: LeafQueryData<SeqTypes> = client
                    .get(&format!("availability/leaf/{avail_block}"))
                    .send()
                    .await
                    .unwrap();
                let leaf_hash = avail_leaf.hash();
                let block_hash = avail_header.commit();
                let payload_hash = avail_header.payload_commitment();

                // Leaf endpoints
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/leaf/{avail_block}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/leaf/hash/{leaf_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/leaf/{avail_block}/{}", avail_block + 1),
                )
                .await?;

                // Header endpoints
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/header/{avail_block}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/header/hash/{block_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/header/payload-hash/{payload_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/header/{avail_block}/{}", avail_block + 1),
                )
                .await?;

                // Block endpoints
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/{avail_block}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/hash/{block_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/payload-hash/{payload_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/{avail_block}/{}", avail_block + 1),
                )
                .await?;

                // Payload endpoints
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/payload/{avail_block}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/payload/hash/{payload_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/payload/block-hash/{block_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/payload/{avail_block}/{}", avail_block + 1),
                )
                .await?;

                // VID common endpoints
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/vid/common/{avail_block}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/vid/common/hash/{block_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/vid/common/payload-hash/{payload_hash}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/vid/common/{avail_block}/{}", avail_block + 1),
                )
                .await?;

                // Transaction endpoints
                let tx_hash = avail_tx.commit();
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/transaction/{avail_block}/0/noproof"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/transaction/hash/{tx_hash}/noproof"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/transaction/{avail_block}/0/proof"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/transaction/hash/{tx_hash}/proof"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/transaction/{avail_block}/0"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/transaction/hash/{tx_hash}"),
                )
                .await?;

                // Block summary endpoints
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/summary/{avail_block}"),
                )
                .await?;
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!(
                        "availability/block/summaries/{avail_block}/{}",
                        avail_block + 1
                    ),
                )
                .await?;

                // Limits endpoint (static response)
                compare_endpoints(&http, api_port, axum_port, "availability/limits").await?;

                // Cert2 endpoint (returns null when no cert is available at this height)
                compare_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/cert2/{avail_block}"),
                )
                .await?;

                // WebSocket streaming parity: both servers share the same data source, so their
                // streams must produce the same items. We collect up to 10 messages from each and
                // verify ≥2 appear in both.
                //
                // For unfiltered streams, start 10 blocks before avail_block so there are at
                // least 10 committed blocks ready to stream (consensus has already stopped).
                // For namespace-filtered streams, start at avail_block where the two submitted
                // transactions were included, giving ≥2 matching messages.
                let ws_start = avail_block.saturating_sub(10);
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/leaves/{ws_start}"),
                )
                .await?;
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/headers/{ws_start}"),
                )
                .await?;
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/blocks/{ws_start}"),
                )
                .await?;
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/payloads/{ws_start}"),
                )
                .await?;
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/vid/common/{ws_start}"),
                )
                .await?;
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/transactions/{ws_start}"),
                )
                .await?;
                // Namespace-filtered streams: start at avail_block; two transactions were
                // submitted so the stream produces ≥2 messages.
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/transactions/{avail_block}/namespace/{avail_ns}"),
                )
                .await?;
                compare_ws_endpoints(
                    api_port,
                    axum_port,
                    &format!("availability/stream/blocks/{avail_block}/namespace/{avail_ns}"),
                )
                .await?;

                // Error equivalence: both tide-disco and Axum must return the same
                // HTTP status codes for common failure cases that clients encounter.

                // Requesting a leaf far ahead of the chain tip times out and returns
                // 404 Not Found from both servers.
                compare_error_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    "availability/leaf/999999",
                    404,
                )
                .await?;

                // Requesting a block range that exceeds the per-request limit
                // returns 400 Bad Request from both servers.
                compare_error_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!("availability/block/{avail_block}/{}", avail_block + 200),
                    400,
                )
                .await?;

                // Requesting a namespace proof range that exceeds the limit also
                // returns 400 Bad Request from both servers.
                compare_error_endpoints(
                    &http,
                    api_port,
                    axum_port,
                    &format!(
                        "availability/block/{avail_block}/{}/namespace/{avail_ns}",
                        avail_block + 200
                    ),
                    400,
                )
                .await?;
            }

            anyhow::Ok(())
        };

        // `block_on` polls the future on the *calling* thread. The default test thread stack is
        // 2 MiB on Linux, which isn't enough for this test's large async state machine. We spawn
        // a fresh thread with 32 MiB and run the tokio runtime there instead.
        std::thread::Builder::new()
            .stack_size(32 * 1024 * 1024)
            .spawn(move || {
                tokio::runtime::Builder::new_multi_thread()
                    .enable_all()
                    .build()
                    .unwrap()
                    .block_on(test)
                    .unwrap()
            })
            .unwrap()
            .join()
            .unwrap()
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_all_validators_endpoint() -> anyhow::Result<()> {
        const EPOCH_HEIGHT: u64 = 20;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");

        const NUM_NODES: usize = 5;

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let network = TestNetwork::new(config, POS_V4).await;
        let client: Client<ServerError, SequencerApiVersion> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        let err = client
            .get::<Vec<RegisteredValidator<PubKey>>>("node/all-validators/1/0/1001")
            .header("Accept", "application/json")
            .send()
            .await
            .unwrap_err();

        assert_matches!(err, ServerError { status, message} if
                status == StatusCode::BAD_REQUEST
                && message.contains("Limit cannot be greater than 1000")
        );

        // Wait for the chain to progress beyond epoch 3
        let mut events = network.peers[0].event_stream();
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 3).await;

        // Verify that there are no validators for epoch # 1 and epoch # 2
        {
            client
                .get::<Vec<RegisteredValidator<PubKey>>>("node/all-validators/1/0/100")
                .send()
                .await
                .unwrap()
                .is_empty();

            client
                .get::<Vec<RegisteredValidator<PubKey>>>("node/all-validators/2/0/100")
                .send()
                .await
                .unwrap()
                .is_empty();
        }

        // Get the epoch # 3 validators
        let validators = client
            .get::<Vec<RegisteredValidator<PubKey>>>("node/all-validators/3/0/100")
            .send()
            .await
            .expect("validators");

        assert!(!validators.is_empty());

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_reward_accounts_catchup_endpoint() -> anyhow::Result<()> {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 3;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let api_port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        println!("API PORT = {api_port}");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(api_port).catchup(Default::default()),
            ))
            .network_config(network_config)
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<StaticVersion<0, 1>>::from_urls(
                    vec![format!("http://localhost:{api_port}").parse().unwrap()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                hotshot_contract_adapter::stake_table::StakeTableContractVersion::V3,
                POS_V4,
            )
            .await
            .unwrap()
            .build();

        let mut network = TestNetwork::new(config, POS_V4).await;

        let client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{api_port}").parse().unwrap());

        client.connect(None).await;

        let mut events = network.server.event_stream();
        wait_for_epochs(&mut events, EPOCH_HEIGHT, 3).await;

        network.stop_consensus().await;
        let height = network.server.decided_leaf().await.height();
        wait_until_block_height(&client, "reward-state-v2/block-height", height).await;

        let err = client
            .get::<Vec<(RewardAccountV2, RewardAmount)>>(&format!(
                "reward-state-v2/reward-amounts/{height}/0/10001"
            ))
            .send()
            .await
            .unwrap_err();

        assert_matches!(err, ServerError { status, .. } if
            status == StatusCode::BAD_REQUEST

        );

        let mut expected: Vec<_> = network
            .server
            .decided_state()
            .await
            .unwrap()
            .reward_merkle_tree_v2
            .iter()
            .map(|(addr, amt)| (*addr, *amt))
            .collect();
        // Results are sorted by account address descending
        expected.sort_by_key(|(acct, _)| std::cmp::Reverse(*acct));

        tracing::info!("expected accounts = {expected:?}");
        let limit = expected.len().min(10_000) as u64;
        let offset = 0u64;
        let expected: Vec<_> = expected.into_iter().take(limit as usize).collect();

        let res = client
            .get::<Vec<(RewardAccountV2, RewardAmount)>>(&format!(
                "reward-state-v2/reward-amounts/{height}/{offset}/{limit}"
            ))
            .send()
            .await
            .unwrap();

        assert_eq!(res, expected);

        Ok(())
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_namespace_query_compat_v0_2() {
        test_namespace_query_compat_helper(Upgrade::trivial(FEE_VERSION)).await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_namespace_query_compat_v0_3() {
        test_namespace_query_compat_helper(Upgrade::trivial(EPOCH_VERSION)).await;
    }

    async fn test_namespace_query_compat_helper(upgrade: Upgrade) {
        // Number of nodes running in the test network.
        const NUM_NODES: usize = 5;

        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url: Url = format!("http://localhost:{port}").parse().unwrap();

        let test_config = TestConfigBuilder::default().build();
        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(Options::from(options::Http {
                port,
                max_connections: None,
                axum_port: None,
                tonic_port: None,
            }))
            .catchups(std::array::from_fn(|_| {
                StatePeers::<SequencerApiVersion>::from_urls(
                    vec![url.clone()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .network_config(test_config)
            .build();

        let mut network = TestNetwork::new(config, upgrade).await;
        let mut events = network.server.event_stream();

        // Submit a transaction.
        let ns = NamespaceId::from(10_000u64);
        let tx = Transaction::new(ns, vec![1, 2, 3]);
        network.server.submit_transaction(tx.clone()).await.unwrap();
        let block = wait_for_decide_on_handle(&mut events, &tx).await.0;

        // Check namespace proof queries.
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);
        client.connect(None).await;

        let (header, common): (Header, VidCommonQueryData<SeqTypes>) = try_join!(
            client.get(&format!("availability/header/{block}")).send(),
            client
                .get(&format!("availability/vid/common/{block}"))
                .send()
        )
        .unwrap();
        let version = header.version();

        // The latest version of the API (whether we specifically ask for v1 or let the redirect
        // occur) will give us a namespace proof no matter which VID version is in use.
        for api_ver in ["/v1", ""] {
            tracing::info!("test namespace API version: {api_ver}");

            let ns_proof: NamespaceProofQueryData = client
                .get(&format!(
                    "{api_ver}/availability/block/{block}/namespace/{ns}"
                ))
                .send()
                .await
                .unwrap();
            let proof = ns_proof.proof.as_ref().unwrap();
            if version < EPOCH_VERSION {
                assert!(matches!(proof, NsProof::V0(..)));
            } else {
                assert!(matches!(proof, NsProof::V1(..)));
            }
            let (txs, ns_from_proof) = proof
                .verify(
                    header.ns_table(),
                    &header.payload_commitment(),
                    common.common(),
                )
                .unwrap();
            assert_eq!(ns_from_proof, ns);
            assert_eq!(txs, ns_proof.transactions);
            assert_eq!(txs, std::slice::from_ref(&tx));

            // Test range endpoint.
            let ns_proofs: Vec<NamespaceProofQueryData> = client
                .get(&format!(
                    "{api_ver}/availability/block/{}/{}/namespace/{ns}",
                    block,
                    block + 1
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(&ns_proofs, std::slice::from_ref(&ns_proof));

            // Any API version can correctly tell us that the namespace does not exist.
            let ns_proof: NamespaceProofQueryData = client
                .get(&format!(
                    "{api_ver}/availability/block/{}/namespace/{ns}",
                    block - 1
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(ns_proof.proof, None);
            assert_eq!(ns_proof.transactions, vec![]);

            // Test streaming.
            let mut proofs = client
                .socket(&format!(
                    "{api_ver}/availability/stream/blocks/0/namespace/{ns}"
                ))
                .subscribe()
                .await
                .unwrap();
            for i in 0.. {
                tracing::info!(i, "stream proof");
                let proof: NamespaceProofQueryData = proofs.next().await.unwrap().unwrap();
                if proof.proof.is_none() {
                    tracing::info!("waiting for non-trivial proof from stream");
                    continue;
                }
                assert_eq!(&proof.transactions, std::slice::from_ref(&tx));
                break;
            }
        }

        // The legacy version of the API only works for old VID.
        tracing::info!("test namespace API version: v0");
        if version < EPOCH_VERSION {
            let ns_proof: ADVZNamespaceProofQueryData = client
                .get(&format!("v0/availability/block/{block}/namespace/{ns}"))
                .send()
                .await
                .unwrap();
            let proof = ns_proof.proof.as_ref().unwrap();
            let VidCommon::V0(common) = common.common() else {
                panic!("wrong VID common version");
            };
            let (txs, ns_from_proof) = proof
                .verify(header.ns_table(), &header.payload_commitment(), common)
                .unwrap();
            assert_eq!(ns_from_proof, ns);
            assert_eq!(txs, ns_proof.transactions);
            assert_eq!(&txs, std::slice::from_ref(&tx));

            // Test range endpoint.
            let ns_proofs: Vec<ADVZNamespaceProofQueryData> = client
                .get(&format!(
                    "v0/availability/block/{}/{}/namespace/{ns}",
                    block,
                    block + 1
                ))
                .send()
                .await
                .unwrap();
            assert_eq!(&ns_proofs, std::slice::from_ref(&ns_proof));
        } else {
            // It will fail if we ask for a proof for a block using new VID.
            client
                .get::<ADVZNamespaceProofQueryData>(&format!(
                    "v0/availability/block/{block}/namespace/{ns}"
                ))
                .send()
                .await
                .unwrap_err();
        }

        // Any API version can correctly tell us that the namespace does not exist.
        let ns_proof: ADVZNamespaceProofQueryData = client
            .get(&format!(
                "v0/availability/block/{}/namespace/{ns}",
                block - 1
            ))
            .send()
            .await
            .unwrap();
        assert_eq!(ns_proof.proof, None);
        assert_eq!(ns_proof.transactions, vec![]);

        // Use the legacy API to stream namespace proofs until we get to a non-trivial proof or a
        // VID version we can't deal with.
        let mut proofs = client
            .socket(&format!("v0/availability/stream/blocks/0/namespace/{ns}"))
            .subscribe()
            .await
            .unwrap();
        for i in 0.. {
            tracing::info!(i, "stream proof");
            let proof: ADVZNamespaceProofQueryData = match proofs.next().await {
                Some(proof) => proof.unwrap(),
                None => {
                    // Steam not expected to end on legacy consensus version.
                    assert!(
                        version >= EPOCH_VERSION,
                        "legacy steam ended while still on legacy consensus"
                    );
                    break;
                },
            };
            if proof.proof.is_none() {
                tracing::info!("waiting for non-trivial proof from stream");
                continue;
            }
            assert_eq!(&proof.transactions, std::slice::from_ref(&tx));
            break;
        }

        network.server.shut_down().await;
    }

    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_light_client_completeness() {
        // Run the through a protocol upgrade and epoch change, then check that we are able to get a
        // correct light client proof for every finalized leaf.

        const NUM_NODES: usize = 1;
        const EPOCH_HEIGHT: u64 = 200;

        let upgrade = Upgrade::new(LEGACY_VERSION, EPOCH_VERSION);
        let port = reserve_tcp_port().expect("OS should have ephemeral ports available");
        let url: Url = format!("http://localhost:{port}").parse().unwrap();

        let test_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .epoch_start_block(321)
            .set_upgrades(upgrade.target)
            .await
            .build();

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let config = TestNetworkConfigBuilder::<NUM_NODES, _, _>::with_num_nodes()
            .api_config(
                SqlDataSource::options(&storage[0], Options::with_port(port))
                    .light_client(Default::default()),
            )
            .persistences(persistence.clone())
            .catchups(std::array::from_fn(|_| {
                StatePeers::<SequencerApiVersion>::from_urls(
                    vec![url.clone()],
                    Default::default(),
                    Duration::from_secs(2),
                    &NoMetrics,
                )
            }))
            .network_config(test_config)
            .build();

        let mut network = TestNetwork::new(config, upgrade).await;
        let client: Client<ServerError, StaticVersion<0, 1>> = Client::new(url);
        client.connect(None).await;

        // Get a leaf stream so that we can wait for various events. Also keep track of each leaf
        // yielded, which we can use as ground truth later in the test.
        let mut actual_leaves = vec![];
        let mut actual_blocks = vec![];
        let mut leaves = client
            .socket("availability/stream/leaves/0")
            .subscribe::<LeafQueryData<SeqTypes>>()
            .await
            .unwrap()
            .zip(
                client
                    .socket("availability/stream/blocks/0")
                    .subscribe::<BlockQueryData<SeqTypes>>()
                    .await
                    .unwrap(),
            )
            .map(|(leaf, block)| {
                let leaf = leaf.unwrap();
                let block = block.unwrap();
                actual_leaves.push(leaf.clone());
                actual_blocks.push(block);
                leaf
            });

        // Wait for the upgrade to take effect.
        let (upgrade_height, first_epoch) = loop {
            let leaf: LeafQueryData<SeqTypes> = leaves.next().await.unwrap();
            if leaf.header().version() < EPOCH_VERSION {
                tracing::info!(version = %leaf.header().version(), height = leaf.header().height(), view = ?leaf.leaf().view_number(), "waiting for epoch upgrade");
                continue;
            }
            break (leaf.height(), leaf.leaf().epoch(EPOCH_HEIGHT).unwrap());
        };
        tracing::info!(upgrade_height, ?first_epoch, "epochs enabled");

        // Wait for two epoch changes (so we get to the first epoch that actually uses the stake
        // table).
        let mut epoch_heights = [0; 2];
        for (i, epoch_height) in epoch_heights.iter_mut().enumerate() {
            let desired_epoch = first_epoch + (i as u64) + 1;
            *epoch_height = loop {
                let leaf = leaves.next().await.unwrap();
                let epoch = leaf.leaf().epoch(EPOCH_HEIGHT).unwrap();
                if epoch > desired_epoch {
                    tracing::info!(
                        height = leaf.height(),
                        ?desired_epoch,
                        ?epoch,
                        "changed epoch"
                    );
                    break leaf.height();
                }
                tracing::info!(
                    ?desired_epoch,
                    height = leaf.header().height(),
                    view = ?leaf.leaf().view_number(),
                    "waiting for epoch change"
                );
            };
        }

        // Wait a few more blocks.
        let max_block = epoch_heights[1] + 1;
        loop {
            let leaf = leaves.next().await.unwrap();
            if leaf.height() > max_block {
                break;
            }
            tracing::info!(max_block, height = leaf.height(), "waiting for block");
        }

        // Stop consensus. All the blocks we are going to query have already been produced.
        // Continuing to run consensus would just waste resources while we check stuff.
        network.stop_consensus().await;

        // Check light client. Querying every single block is too slow, so we'll check a few blocks
        // around various critical points:
        let heights =
        // * The first few blocks, including genesis
            (0..=1)
        // * A few blocks just before and after the upgrade
            .chain(upgrade_height-1..=upgrade_height+1)
        // * A few blocks just before and after the first epoch change
            .chain(epoch_heights[0]-1..=epoch_heights[0] + 1)
        // * A few blocks just before and after the stake table comes into effect
            .chain(epoch_heights[1]-1..=max_block);

        let quorum = EpochChangeQuorum::new(EPOCH_HEIGHT);
        for i in heights {
            let leaf = &actual_leaves[i as usize];
            let block = &actual_blocks[i as usize];
            tracing::info!(i, ?leaf, ?block, "check leaf");

            // Get the same leaf proof by various IDs.
            let client = &client;
            let proofs = try_join_all(
                [
                    format!("light-client/leaf/{i}"),
                    format!("light-client/leaf/hash/{}", leaf.hash()),
                    format!("light-client/leaf/block-hash/{}", leaf.block_hash()),
                ]
                .into_iter()
                .map(|path| async move {
                    tracing::info!(i, path, "fetch leaf proof");
                    let proof = client.get::<LeafProof>(&path).send().await?;
                    Ok::<_, anyhow::Error>((path, proof))
                }),
            )
            .await
            .unwrap();

            // Check proofs against expected leaf.
            for (path, proof) in proofs {
                tracing::info!(i, path, ?proof, "check leaf proof");
                assert_eq!(
                    proof.verify(LeafProofHint::Quorum(&quorum)).await.unwrap(),
                    *leaf
                );
            }

            // Get the corresponding header.
            let root_height = i + 1;
            let root = actual_leaves[root_height as usize].header();
            let proofs = try_join_all(
                [
                    format!("light-client/header/{root_height}/{i}"),
                    format!(
                        "light-client/header/{root_height}/hash/{}",
                        leaf.block_hash()
                    ),
                ]
                .into_iter()
                .map(|path| async move {
                    tracing::info!(i, path, "get header proof");
                    let proof = client.get::<HeaderProof>(&path).send().await?;
                    Ok::<_, anyhow::Error>((path, proof))
                }),
            )
            .await
            .unwrap();
            for (path, proof) in proofs {
                tracing::info!(i, path, ?proof, "check header proof");
                assert_eq!(
                    proof.verify_ref(root.block_merkle_tree_root()).unwrap(),
                    leaf.header()
                );
            }

            // Get the corresponding payload.
            let proof = client
                .get::<PayloadProof>(&format!("light-client/payload/{i}"))
                .send()
                .await
                .unwrap();
            assert_eq!(proof.verify(leaf.header()).unwrap(), *block.payload());
        }

        // Check light client stake table.
        let events: Vec<StakeTableEvent> = client
            .get(&format!("light-client/stake-table/{}", first_epoch + 2))
            .send()
            .await
            .unwrap();
        let mut state_from_events = StakeTableState::default();
        for event in events {
            state_from_events.apply_event(event).unwrap().unwrap();
        }

        assert_eq!(
            state_from_events.into_validators(),
            network
                .server
                .consensus_handle()
                .storage()
                .await
                .load_all_validators(first_epoch + 2, 0, 1_000_000)
                .await
                .unwrap()
                .into_iter()
                .map(|v| (v.account, v))
                .collect::<RegisteredValidatorMap>()
        );

        // Querying for a stake table before the first real epoch is an error.
        let err = client
            .get::<Vec<StakeTableEvent>>(&format!("light-client/stake-table/{}", first_epoch + 1))
            .send()
            .await
            .unwrap_err();
        assert_eq!(err.status(), StatusCode::BAD_REQUEST);
    }

    /// Test that `fetch_leaf` returns a leaf with exactly the requested block height.
    #[test_log::test(tokio::test(flavor = "multi_thread"))]
    async fn test_fetch_leaf_returns_exact_height() -> anyhow::Result<()> {
        const EPOCH_HEIGHT: u64 = 10;
        const NUM_NODES: usize = 5;
        const TARGET_HEIGHT: u64 = EPOCH_HEIGHT * 3 + 2;

        let network_config = TestConfigBuilder::default()
            .epoch_height(EPOCH_HEIGHT)
            .build();

        let port = reserve_tcp_port().expect("No ports free for query service");

        let storage = join_all((0..NUM_NODES).map(|_| SqlDataSource::create_storage())).await;
        let persistence: [_; NUM_NODES] = storage
            .iter()
            .map(<SqlDataSource as TestableSequencerDataSource>::persistence_options)
            .collect::<Vec<_>>()
            .try_into()
            .unwrap();

        let catchup_peers = std::array::from_fn(|_| {
            StatePeers::<StaticVersion<0, 1>>::from_urls(
                vec![format!("http://localhost:{port}").parse().unwrap()],
                Default::default(),
                Duration::from_secs(2),
                &NoMetrics,
            )
        });

        let config = TestNetworkConfigBuilder::with_num_nodes()
            .api_config(SqlDataSource::options(
                &storage[0],
                Options::with_port(port),
            ))
            .network_config(network_config)
            .persistences(persistence)
            .catchups(catchup_peers)
            .pos_hook(
                DelegationConfig::MultipleDelegators,
                Default::default(),
                POS_V4,
            )
            .await?
            .build();

        let network = TestNetwork::new(config, POS_V4).await;

        // Wait for chain to advance past our target height
        let height_client: Client<ServerError, StaticVersion<0, 1>> =
            Client::new(format!("http://localhost:{port}").parse().unwrap());
        wait_until_block_height(&height_client, "node/block-height", TARGET_HEIGHT + 5).await;

        // Get the stake table and threshold for the epoch containing TARGET_HEIGHT
        let coordinator = network.server.node_state().coordinator;
        let epoch = EpochNumber::new(epoch_from_block_number(TARGET_HEIGHT, EPOCH_HEIGHT));
        let snapshot = coordinator.membership().snapshot(epoch).expect("snapshot");
        let stake_table = HSStakeTable::from_iter(snapshot.stake_table());
        let success_threshold = snapshot.success_threshold();

        // Use StatePeers to fetch the leaf at the exact target height
        let catchup = StatePeers::<StaticVersion<0, 1>>::from_urls(
            vec![format!("http://localhost:{port}").parse().unwrap()],
            Default::default(),
            Duration::from_secs(5),
            &NoMetrics,
        );

        let leaf = catchup
            .fetch_leaf(TARGET_HEIGHT, stake_table, success_threshold)
            .await?;

        assert_eq!(
            leaf.height(),
            TARGET_HEIGHT,
            "fetch_leaf must return the leaf at exactly the requested height"
        );

        Ok(())
    }
}