doc: Update testnet block number to 34112653

feat: cache spot metadata in database to reduce API calls

README.md

@@ -60,19 +60,19 @@ $ reth-hl node --http --http.addr 0.0.0.0 --http.api eth,ots,net,web3 \
 
 ## How to run (testnet)
 
-Testnet is supported since block 30281484.
+Testnet is supported since block 34112653.
 
 ```sh
-# Get testnet genesis at block 30281484
+# Get testnet genesis at block 34112653
 $ cd ~
 $ git clone https://github.com/sprites0/hl-testnet-genesis
 $ zstd --rm -d ~/hl-testnet-genesis/*.zst
 
 # Init node
 $ make install
-$ reth-hl init-state --without-evm --chain testnet --header ~/hl-testnet-genesis/30281484.rlp \
-  --header-hash 0x147cc3c09e9ddbb11799c826758db284f77099478ab5f528d3a57a6105516c21 \
-  ~/hl-testnet-genesis/30281484.jsonl --total-difficulty 0 
+$ reth-hl init-state --without-evm --chain testnet --header ~/hl-testnet-genesis/34112653.rlp \
+  --header-hash 0xeb79aca618ab9fda6d463fddd3ad439045deada1f539cbab1c62d7e6a0f5859a \
+  ~/hl-testnet-genesis/34112653.jsonl --total-difficulty 0 
 
 # Run node
 $ reth-hl node --chain testnet --http --http.addr 0.0.0.0 --http.api eth,ots,net,web3 \

src/addons/mod.rs

@@ -1,5 +1,5 @@
 pub mod call_forwarder;
 pub mod hl_node_compliance;
-pub mod tx_forwarder;
 pub mod subscribe_fixup;
+pub mod tx_forwarder;
 mod utils;

src/chainspec/mod.rs

@@ -1,7 +1,10 @@
 pub mod hl;
 pub mod parser;
 
-use crate::{hardforks::HlHardforks, node::primitives::{header::HlHeaderExtras, HlHeader}};
+use crate::{
+    hardforks::HlHardforks,
+    node::primitives::{HlHeader, header::HlHeaderExtras},
+};
 use alloy_eips::eip7840::BlobParams;
 use alloy_genesis::Genesis;
 use alloy_primitives::{Address, B256, U256};

src/main.rs

@@ -18,7 +18,9 @@ use reth_hl::{
         HlNode,
         cli::{Cli, HlNodeArgs},
         rpc::precompile::{HlBlockPrecompileApiServer, HlBlockPrecompileExt},
+        spot_meta::init as spot_meta_init,
         storage::tables::Tables,
+        types::set_spot_metadata_db,
     },
 };
 use tracing::info;
@@ -39,8 +41,11 @@ fn main() -> eyre::Result<()> {
          ext: HlNodeArgs| async move {
             let default_upstream_rpc_url = builder.config().chain.official_rpc_url();
 
-            let (node, engine_handle_tx) =
-                HlNode::new(ext.block_source_args.parse().await?, ext.debug_cutoff_height);
+            let (node, engine_handle_tx) = HlNode::new(
+                ext.block_source_args.parse().await?,
+                ext.debug_cutoff_height,
+                ext.allow_network_overrides,
+            );
             let NodeHandle { node, node_exit_future: exit_future } = builder
                 .node(node)
                 .extend_rpc_modules(move |mut ctx| {
@@ -92,6 +97,16 @@ fn main() -> eyre::Result<()> {
                 })
                 .apply(|mut builder| {
                     builder.db_mut().create_tables_for::<Tables>().expect("create tables");
+
+                    let chain_id = builder.config().chain.inner.chain().id();
+                    let db = builder.db_mut().clone();
+
+                    // Set database handle for on-demand persistence
+                    set_spot_metadata_db(db.clone());
+
+                    // Load spot metadata from database and initialize cache
+                    spot_meta_init::load_spot_metadata_cache(&db, chain_id);
+
                     builder
                 })
                 .launch()

src/node/cli.rs

@@ -2,7 +2,7 @@ use crate::{
     chainspec::{HlChainSpec, parser::HlChainSpecParser},
     node::{
         HlNode, consensus::HlConsensus, evm::config::HlEvmConfig, migrate::Migrator,
-        storage::tables::Tables,
+        spot_meta::init as spot_meta_init, storage::tables::Tables,
     },
     pseudo_peer::BlockSourceArgs,
 };
@@ -82,6 +82,13 @@ pub struct HlNodeArgs {
     /// * Refers to the Merkle trie used for eth_getProof and state root, not actual state values.
     #[arg(long, env = "EXPERIMENTAL_ETH_GET_PROOF")]
     pub experimental_eth_get_proof: bool,
+
+    /// Allow network configuration overrides from CLI.
+    ///
+    /// When enabled, network settings (discovery_addr, listener_addr, dns_discovery, nat)
+    /// will be taken from CLI arguments instead of being hardcoded to localhost-only defaults.
+    #[arg(long, env = "ALLOW_NETWORK_OVERRIDES")]
+    pub allow_network_overrides: bool,
 }
 
 /// The main reth_hl cli interface.
@@ -145,8 +152,12 @@ where
 
         match self.command {
             Commands::Node(command) => runner.run_command_until_exit(|ctx| {
-                Self::migrate_db(&command.chain, &command.datadir, &command.db)
-                    .expect("Failed to migrate database");
+                // NOTE: This is for one time migration around Oct 10 upgrade:
+                // It's not necessary anymore, an environment variable gate is added here.
+                if std::env::var("CHECK_DB_MIGRATION").is_ok() {
+                    Self::migrate_db(&command.chain, &command.datadir, &command.db)
+                        .expect("Failed to migrate database");
+                }
                 command.execute(ctx, FnLauncher::new::<C, Ext>(launcher))
             }),
             Commands::Init(command) => {
@@ -190,7 +201,12 @@ where
         let data_dir = env.datadir.clone().resolve_datadir(env.chain.chain());
         let db_path = data_dir.db();
         init_db(db_path.clone(), env.db.database_args())?;
-        init_db_for::<_, Tables>(db_path, env.db.database_args())?;
+        init_db_for::<_, Tables>(db_path.clone(), env.db.database_args())?;
+
+        // Initialize spot metadata in database
+        let chain_id = env.chain.chain().id();
+        spot_meta_init::init_spot_metadata(db_path, env.db.database_args(), chain_id)?;
+
         Ok(())
     }
 

src/node/consensus/mod.rs

@@ -1,4 +1,8 @@
-use crate::{hardforks::HlHardforks, node::{primitives::HlHeader, HlNode}, HlBlock, HlBlockBody, HlPrimitives};
+use crate::{
+    HlBlock, HlBlockBody, HlPrimitives,
+    hardforks::HlHardforks,
+    node::{HlNode, primitives::HlHeader},
+};
 use reth::{
     api::{FullNodeTypes, NodeTypes},
     beacon_consensus::EthBeaconConsensus,

src/node/evm/assembler.rs

@@ -1,5 +1,6 @@
 use crate::{
-    node::evm::config::{HlBlockExecutorFactory, HlEvmConfig}, HlBlock, HlHeader
+    HlBlock, HlHeader,
+    node::evm::config::{HlBlockExecutorFactory, HlEvmConfig},
 };
 use reth_evm::{
     block::BlockExecutionError,

src/node/migrate.rs

@@ -270,8 +270,8 @@ impl<'a, N: HlNodeType> MigrateStaticFiles<'a, N> {
         let mut first = true;
 
         for (block_range, _tx_ranges) in all_static_files {
-            let migration_needed = self.using_old_header(block_range.start())?
-                || self.using_old_header(block_range.end())?;
+            let migration_needed = self.using_old_header(block_range.start())? ||
+                self.using_old_header(block_range.end())?;
             if !migration_needed {
                 // Create a placeholder symlink
                 self.create_placeholder(block_range)?;
@@ -346,7 +346,7 @@ fn migrate_single_static_file<N: HlNodeType>(
 
     // block_ranges into chunks of 50000 blocks
     const CHUNK_SIZE: u64 = 50000;
-    for chunk in (0..=block_range.end()).step_by(CHUNK_SIZE as usize) {
+    for chunk in (block_range.start()..=block_range.end()).step_by(CHUNK_SIZE as usize) {
         let end = std::cmp::min(chunk + CHUNK_SIZE - 1, block_range.end());
         let block_range = chunk..=end;
         let headers = old_headers_range(sf_in, block_range.clone())?;

src/node/mod.rs

@@ -51,12 +51,14 @@ pub struct HlNode {
     engine_handle_rx: Arc<Mutex<Option<oneshot::Receiver<ConsensusEngineHandle<HlPayloadTypes>>>>>,
     block_source_config: BlockSourceConfig,
     debug_cutoff_height: Option<u64>,
+    allow_network_overrides: bool,
 }
 
 impl HlNode {
     pub fn new(
         block_source_config: BlockSourceConfig,
         debug_cutoff_height: Option<u64>,
+        allow_network_overrides: bool,
     ) -> (Self, oneshot::Sender<ConsensusEngineHandle<HlPayloadTypes>>) {
         let (tx, rx) = oneshot::channel();
         (
@@ -64,6 +66,7 @@ impl HlNode {
                 engine_handle_rx: Arc::new(Mutex::new(Some(rx))),
                 block_source_config,
                 debug_cutoff_height,
+                allow_network_overrides,
             },
             tx,
         )
@@ -95,6 +98,7 @@ impl HlNode {
                 engine_handle_rx: self.engine_handle_rx.clone(),
                 block_source_config: self.block_source_config.clone(),
                 debug_cutoff_height: self.debug_cutoff_height,
+                allow_network_overrides: self.allow_network_overrides,
             })
             .consensus(HlConsensusBuilder::default())
     }

src/node/network/block_import/service.rs

@@ -179,7 +179,7 @@ where
 
 #[cfg(test)]
 mod tests {
-    use crate::{chainspec::hl::hl_mainnet, HlHeader};
+    use crate::{HlHeader, chainspec::hl::hl_mainnet};
 
     use super::*;
     use alloy_primitives::{B256, U128};

src/node/network/mod.rs

@@ -25,7 +25,10 @@ use reth_network::{NetworkConfig, NetworkHandle, NetworkManager};
 use reth_network_api::PeersInfo;
 use reth_provider::StageCheckpointReader;
 use reth_stages_types::StageId;
-use std::sync::Arc;
+use std::{
+    net::{Ipv4Addr, SocketAddr},
+    sync::Arc,
+};
 use tokio::sync::{Mutex, mpsc, oneshot};
 use tracing::info;
 
@@ -144,6 +147,8 @@ pub struct HlNetworkBuilder {
     pub(crate) block_source_config: BlockSourceConfig,
 
     pub(crate) debug_cutoff_height: Option<u64>,
+
+    pub(crate) allow_network_overrides: bool,
 }
 
 impl HlNetworkBuilder {
@@ -174,15 +179,24 @@ impl HlNetworkBuilder {
             ImportService::new(consensus, handle, from_network, to_network).await.unwrap();
         });
 
-        Ok(ctx.build_network_config(
-            ctx.network_config_builder()?
+        let mut config_builder = ctx.network_config_builder()?;
+
+        // Only apply localhost-only network settings if network overrides are NOT allowed
+        if !self.allow_network_overrides {
+            config_builder = config_builder
+                .discovery_addr(SocketAddr::new(Ipv4Addr::LOCALHOST.into(), 0))
+                .listener_addr(SocketAddr::new(Ipv4Addr::LOCALHOST.into(), 0))
                 .disable_dns_discovery()
-                .disable_nat()
-                .boot_nodes(boot_nodes())
-                .set_head(ctx.head())
-                .with_pow()
-                .block_import(Box::new(HlBlockImport::new(handle))),
-        ))
+                .disable_nat();
+        }
+
+        config_builder = config_builder
+            .boot_nodes(boot_nodes())
+            .set_head(ctx.head())
+            .with_pow()
+            .block_import(Box::new(HlBlockImport::new(handle)));
+
+        Ok(ctx.build_network_config(config_builder))
     }
 }
 

src/node/primitives/body.rs

@@ -3,8 +3,13 @@ use alloy_primitives::Address;
 use reth_primitives_traits::{BlockBody as BlockBodyTrait, InMemorySize};
 use serde::{Deserialize, Serialize};
 
-use crate::node::types::{ReadPrecompileCall, ReadPrecompileCalls};
-use crate::{HlHeader, node::primitives::TransactionSigned};
+use crate::{
+    HlHeader,
+    node::{
+        primitives::TransactionSigned,
+        types::{ReadPrecompileCall, ReadPrecompileCalls},
+    },
+};
 
 /// Block body for HL. It is equivalent to Ethereum [`BlockBody`] but additionally stores sidecars
 /// for blob transactions.
@@ -33,13 +38,11 @@ pub type BlockBody = alloy_consensus::BlockBody<TransactionSigned, HlHeader>;
 
 impl InMemorySize for HlBlockBody {
     fn size(&self) -> usize {
-        self.inner.size()
-            + self
-                .sidecars
+        self.inner.size() +
+            self.sidecars
                 .as_ref()
-                .map_or(0, |s| s.capacity() * core::mem::size_of::<BlobTransactionSidecar>())
-            + self
-                .read_precompile_calls
+                .map_or(0, |s| s.capacity() * core::mem::size_of::<BlobTransactionSidecar>()) +
+            self.read_precompile_calls
                 .as_ref()
                 .map_or(0, |s| s.0.capacity() * core::mem::size_of::<ReadPrecompileCall>())
     }

src/node/primitives/header.rs

@@ -45,7 +45,11 @@ pub struct HlHeaderExtras {
 }
 
 impl HlHeader {
-    pub(crate) fn from_ethereum_header(header: Header, receipts: &[EthereumReceipt], system_tx_count: u64) -> HlHeader {
+    pub(crate) fn from_ethereum_header(
+        header: Header,
+        receipts: &[EthereumReceipt],
+        system_tx_count: u64,
+    ) -> HlHeader {
         let logs_bloom = logs_bloom(receipts.iter().flat_map(|r| &r.logs));
         HlHeader {
             inner: header,
@@ -183,8 +187,9 @@ impl reth_codecs::Compact for HlHeader {
         // because Compact trait requires the Bytes field to be placed at the end of the struct.
         // Bytes::from_compact just reads all trailing data as the Bytes field.
         //
-        // Hence we need to use other form of serialization, since extra headers are not Compact-compatible.
-        // We just treat all header fields as rmp-serialized one `Bytes` field.
+        // Hence we need to use other form of serialization, since extra headers are not
+        // Compact-compatible. We just treat all header fields as rmp-serialized one `Bytes`
+        // field.
         let result: Bytes = rmp_serde::to_vec(&self).unwrap().into();
         result.to_compact(buf)
     }

src/node/primitives/rlp.rs

@@ -1,6 +1,6 @@
 #![allow(clippy::owned_cow)]
 use super::{HlBlock, HlBlockBody, TransactionSigned};
-use crate::{node::types::ReadPrecompileCalls, HlHeader};
+use crate::{HlHeader, node::types::ReadPrecompileCalls};
 use alloy_consensus::{BlobTransactionSidecar, BlockBody};
 use alloy_eips::eip4895::Withdrawals;
 use alloy_primitives::Address;

src/node/primitives/serde_bincode_compat.rs

@@ -6,7 +6,10 @@ use serde::{Deserialize, Serialize};
 use std::borrow::Cow;
 
 use super::{HlBlock, HlBlockBody};
-use crate::{node::{primitives::BlockBody, types::ReadPrecompileCalls}, HlHeader};
+use crate::{
+    HlHeader,
+    node::{primitives::BlockBody, types::ReadPrecompileCalls},
+};
 
 #[derive(Debug, Serialize, Deserialize)]
 pub struct HlBlockBodyBincode<'a> {

src/node/spot_meta/init.rs

@@ -0,0 +1,103 @@
+use crate::node::{
+    spot_meta::{SpotId, erc20_contract_to_spot_token},
+    storage::tables::{self, SPOT_METADATA_KEY},
+    types::reth_compat,
+};
+use alloy_primitives::Address;
+use reth_db::{
+    DatabaseEnv,
+    cursor::DbCursorRO,
+};
+use reth_db_api::{
+    Database,
+    transaction::DbTx,
+};
+use std::{collections::BTreeMap, sync::Arc};
+use tracing::info;
+
+/// Load spot metadata from database and initialize cache
+pub fn load_spot_metadata_cache(db: &Arc<DatabaseEnv>, chain_id: u64) {
+    // Try to read from database
+    let data = match db.view(|tx| -> Result<Option<Vec<u8>>, reth_db::DatabaseError> {
+        let mut cursor = tx.cursor_read::<tables::SpotMetadata>()?;
+        Ok(cursor.seek_exact(SPOT_METADATA_KEY)?.map(|(_, data)| data.to_vec()))
+    }) {
+        Ok(Ok(data)) => data,
+        Ok(Err(e)) => {
+            info!(
+                "Failed to read spot metadata from database: {}. Will fetch on-demand from API.",
+                e
+            );
+            return;
+        }
+        Err(e) => {
+            info!(
+                "Database view error while loading spot metadata: {}. Will fetch on-demand from API.",
+                e
+            );
+            return;
+        }
+    };
+
+    // Check if data exists
+    let Some(data) = data else {
+        info!(
+            "No spot metadata found in database for chain {}. Run 'init-state' to populate, or it will be fetched on-demand from API.",
+            chain_id
+        );
+        return;
+    };
+
+    // Deserialize metadata
+    let serializable_map = match rmp_serde::from_slice::<BTreeMap<Address, u64>>(&data) {
+        Ok(map) => map,
+        Err(e) => {
+            info!("Failed to deserialize spot metadata: {}. Will fetch on-demand from API.", e);
+            return;
+        }
+    };
+
+    // Convert and initialize cache
+    let metadata: BTreeMap<Address, SpotId> =
+        serializable_map.into_iter().map(|(addr, index)| (addr, SpotId { index })).collect();
+
+    info!("Loaded spot metadata from database ({} entries)", metadata.len());
+    reth_compat::initialize_spot_metadata_cache(metadata);
+}
+
+/// Initialize spot metadata in database from API
+pub fn init_spot_metadata(
+    db_path: impl AsRef<std::path::Path>,
+    db_args: reth_db::mdbx::DatabaseArguments,
+    chain_id: u64,
+) -> eyre::Result<()> {
+    info!("Initializing spot metadata for chain {}", chain_id);
+
+    let db = Arc::new(reth_db::open_db(db_path.as_ref(), db_args)?);
+
+    // Check if spot metadata already exists
+    let exists = db.view(|tx| -> Result<bool, reth_db::DatabaseError> {
+        let mut cursor = tx.cursor_read::<tables::SpotMetadata>()?;
+        Ok(cursor.seek_exact(SPOT_METADATA_KEY)?.is_some())
+    })??;
+
+    if exists {
+        info!("Spot metadata already exists in database");
+        return Ok(());
+    }
+
+    // Fetch from API
+    let metadata = match erc20_contract_to_spot_token(chain_id) {
+        Ok(m) => m,
+        Err(e) => {
+            info!("Failed to fetch spot metadata from API: {}. Will be fetched on-demand.", e);
+            return Ok(());
+        }
+    };
+
+    // Store to database
+    reth_compat::store_spot_metadata(&db, &metadata)?;
+
+    info!("Successfully fetched and stored spot metadata for chain {}", chain_id);
+    Ok(())
+}

src/node/spot_meta/mod.rs

@@ -5,6 +5,7 @@ use std::collections::BTreeMap;
 
 use crate::chainspec::{MAINNET_CHAIN_ID, TESTNET_CHAIN_ID};
 
+pub mod init;
 mod patch;
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -25,7 +26,7 @@ pub struct SpotMeta {
 }
 
 #[derive(Debug, Clone)]
-pub(crate) struct SpotId {
+pub struct SpotId {
     pub index: u64,
 }
 

src/node/storage/tables.rs

@@ -2,10 +2,21 @@ use alloy_primitives::{BlockNumber, Bytes};
 use reth_db::{TableSet, TableType, TableViewer, table::TableInfo, tables};
 use std::fmt;
 
+/// Static key used for spot metadata, as the database is unique to each chain.
+/// This may later serve as a versioning key to assist with future database migrations.
+pub const SPOT_METADATA_KEY: u64 = 0;
+
 tables! {
     /// Read precompile calls for each block.
     table BlockReadPrecompileCalls {
         type Key = BlockNumber;
         type Value = Bytes;
     }
+
+    /// Spot metadata mapping (EVM address to spot token index).
+    /// Uses a constant key since the database is chain-specific.
+    table SpotMetadata {
+        type Key = u64;
+        type Value = Bytes;
+    }
 }

src/node/types/mod.rs

@@ -19,6 +19,9 @@ pub struct ReadPrecompileCalls(pub Vec<ReadPrecompileCall>);
 
 pub(crate) mod reth_compat;
 
+// Re-export spot metadata functions
+pub use reth_compat::{initialize_spot_metadata_cache, set_spot_metadata_db};
+
 #[derive(Debug, Clone, Serialize, Deserialize, Default)]
 pub struct HlExtras {
     pub read_precompile_calls: Option<ReadPrecompileCalls>,
@@ -127,6 +130,19 @@ pub struct SystemTx {
     pub receipt: Option<LegacyReceipt>,
 }
 
+impl SystemTx {
+    pub fn gas_limit(&self) -> u64 {
+        use reth_compat::Transaction;
+        match &self.tx {
+            Transaction::Legacy(tx) => tx.gas_limit,
+            Transaction::Eip2930(tx) => tx.gas_limit,
+            Transaction::Eip1559(tx) => tx.gas_limit,
+            Transaction::Eip4844(tx) => tx.gas_limit,
+            Transaction::Eip7702(tx) => tx.gas_limit,
+        }
+    }
+}
+
 #[derive(
     Debug,
     Clone,

src/node/types/reth_compat.rs

@@ -1,11 +1,14 @@
 //! Copy of reth codebase to preserve serialization compatibility
+use crate::node::storage::tables::{SPOT_METADATA_KEY, SpotMetadata};
 use alloy_consensus::{Header, Signed, TxEip1559, TxEip2930, TxEip4844, TxEip7702, TxLegacy};
-use alloy_primitives::{Address, BlockHash, Signature, TxKind, U256};
+use alloy_primitives::{Address, BlockHash, Bytes, Signature, TxKind, U256};
+use reth_db::{DatabaseEnv, DatabaseError, cursor::DbCursorRW};
+use reth_db_api::{Database, transaction::DbTxMut};
 use reth_primitives::TransactionSigned as RethTxSigned;
 use serde::{Deserialize, Serialize};
 use std::{
     collections::BTreeMap,
-    sync::{Arc, LazyLock, RwLock},
+    sync::{Arc, LazyLock, Mutex, RwLock},
 };
 use tracing::info;
 
@@ -81,42 +84,93 @@ pub struct SealedBlock {
     pub body: BlockBody,
 }
 
-fn system_tx_to_reth_transaction(transaction: &SystemTx, chain_id: u64) -> TxSigned {
-    static EVM_MAP: LazyLock<Arc<RwLock<BTreeMap<Address, SpotId>>>> =
-        LazyLock::new(|| Arc::new(RwLock::new(BTreeMap::new())));
-    {
-        let Transaction::Legacy(tx) = &transaction.tx else {
-            panic!("Unexpected transaction type");
-        };
-        let TxKind::Call(to) = tx.to else {
-            panic!("Unexpected contract creation");
-        };
-        let s = if tx.input.is_empty() {
-            U256::from(0x1)
-        } else {
-            loop {
-                if let Some(spot) = EVM_MAP.read().unwrap().get(&to) {
-                    break spot.to_s();
-                }
+static SPOT_EVM_MAP: LazyLock<Arc<RwLock<BTreeMap<Address, SpotId>>>> =
+    LazyLock::new(|| Arc::new(RwLock::new(BTreeMap::new())));
 
-                info!("Contract not found: {to:?} from spot mapping, fetching again...");
-                *EVM_MAP.write().unwrap() = erc20_contract_to_spot_token(chain_id).unwrap();
-            }
-        };
-        let signature = Signature::new(U256::from(0x1), s, true);
-        TxSigned::Default(RethTxSigned::Legacy(Signed::new_unhashed(tx.clone(), signature)))
+// Optional database handle for persisting on-demand fetches
+static DB_HANDLE: LazyLock<Mutex<Option<Arc<DatabaseEnv>>>> = LazyLock::new(|| Mutex::new(None));
+
+/// Set the database handle for persisting spot metadata
+pub fn set_spot_metadata_db(db: Arc<DatabaseEnv>) {
+    *DB_HANDLE.lock().unwrap() = Some(db);
+}
+
+/// Initialize the spot metadata cache with data loaded from database.
+/// This should be called during node initialization.
+pub fn initialize_spot_metadata_cache(metadata: BTreeMap<Address, SpotId>) {
+    *SPOT_EVM_MAP.write().unwrap() = metadata;
+}
+
+/// Helper function to serialize and store spot metadata to database
+pub fn store_spot_metadata(
+    db: &Arc<DatabaseEnv>,
+    metadata: &BTreeMap<Address, SpotId>,
+) -> Result<(), DatabaseError> {
+    db.update(|tx| {
+        let mut cursor = tx.cursor_write::<SpotMetadata>()?;
+
+        // Serialize to BTreeMap<Address, u64>
+        let serializable_map: BTreeMap<Address, u64> =
+            metadata.iter().map(|(addr, spot)| (*addr, spot.index)).collect();
+
+        cursor.upsert(
+            SPOT_METADATA_KEY,
+            &Bytes::from(
+                rmp_serde::to_vec(&serializable_map).expect("Failed to serialize spot metadata"),
+            ),
+        )?;
+        Ok(())
+    })?
+}
+
+/// Persist spot metadata to database if handle is available
+fn persist_spot_metadata_to_db(metadata: &BTreeMap<Address, SpotId>) {
+    if let Some(db) = DB_HANDLE.lock().unwrap().as_ref() {
+        match store_spot_metadata(db, metadata) {
+            Ok(_) => info!("Persisted spot metadata to database"),
+            Err(e) => info!("Failed to persist spot metadata to database: {}", e),
+        }
     }
 }
 
+fn system_tx_to_reth_transaction(transaction: &SystemTx, chain_id: u64) -> TxSigned {
+    let Transaction::Legacy(tx) = &transaction.tx else {
+        panic!("Unexpected transaction type");
+    };
+    let TxKind::Call(to) = tx.to else {
+        panic!("Unexpected contract creation");
+    };
+    let s = if tx.input.is_empty() {
+        U256::from(0x1)
+    } else {
+        loop {
+            if let Some(spot) = SPOT_EVM_MAP.read().unwrap().get(&to) {
+                break spot.to_s();
+            }
+
+            // Cache miss - fetch from API, update cache, and persist to database
+            info!("Contract not found: {to:?} from spot mapping, fetching from API...");
+            let metadata = erc20_contract_to_spot_token(chain_id).unwrap();
+            *SPOT_EVM_MAP.write().unwrap() = metadata.clone();
+            persist_spot_metadata_to_db(&metadata);
+        }
+    };
+    let signature = Signature::new(U256::from(0x1), s, true);
+    TxSigned::Default(RethTxSigned::Legacy(Signed::new_unhashed(tx.clone(), signature)))
+}
+
 impl SealedBlock {
     pub fn to_reth_block(
         &self,
         read_precompile_calls: ReadPrecompileCalls,
         highest_precompile_address: Option<Address>,
-        system_txs: Vec<super::SystemTx>,
+        mut system_txs: Vec<super::SystemTx>,
         receipts: Vec<LegacyReceipt>,
         chain_id: u64,
     ) -> HlBlock {
+        // NOTE: These types of transactions are tracked at #97.
+        system_txs.retain(|tx| tx.receipt.is_some());
+
         let mut merged_txs = vec![];
         merged_txs.extend(system_txs.iter().map(|tx| system_tx_to_reth_transaction(tx, chain_id)));
         merged_txs.extend(self.body.transactions.iter().map(|tx| tx.to_reth_transaction()));

src/pseudo_peer/service.rs

@@ -82,8 +82,8 @@ impl BlockPoller {
             .ok_or(eyre::eyre!("Failed to find latest block number"))?;
 
         loop {
-            if let Some(debug_cutoff_height) = debug_cutoff_height
-                && next_block_number > debug_cutoff_height
+            if let Some(debug_cutoff_height) = debug_cutoff_height &&
+                next_block_number > debug_cutoff_height
             {
                 next_block_number = debug_cutoff_height;
             }