fix: checkpoints getter and crash due to the usage of default MemTrac…

…ker in MemoryDB (#126)

ethereum-common/src/memory_db.rs

@@ -1,7 +1,8 @@
 use super::{keccak_hasher::KeccakHasher, *};
-use ::memory_db::HashKey;
+use ::memory_db::{HashKey, NoopTracker};
 
-pub type MemoryDB = ::memory_db::MemoryDB<KeccakHasher, HashKey<KeccakHasher>, Vec<u8>>;
+pub type MemoryDB =
+    ::memory_db::MemoryDB<KeccakHasher, HashKey<KeccakHasher>, Vec<u8>, NoopTracker<Vec<u8>>>;
 
 pub fn new() -> MemoryDB {
     memory_db::MemoryDB::from_null_node(&rlp::NULL_RLP, rlp::NULL_RLP.as_ref().into())

gear-programs/checkpoint-light-client/src/wasm/state.rs

@@ -125,37 +125,26 @@ impl<const N: usize> Checkpoints<N> {
 
             Err(0) => Err(CheckpointError::OutDated),
 
-            Err(index) if index < self.slots.len() => {
+            Err(index) => {
                 let (index_previous, slot_previous) = self.slots[index - 1];
-                let (index_next, slot_next) = self.slots[index];
-
-                let gap = match (slot_next - slot_previous) % SLOTS_PER_EPOCH {
-                    // both slots are divisable by SLOTS_PER_EPOCH and the distance
-                    // between them is greater than SLOTS_PER_EPOCH
-                    0 if slot_previous + SLOTS_PER_EPOCH < slot_next => true,
-                    _ => false,
-                };
-
-                let offset = ((slot - 1 - slot_previous) / SLOTS_PER_EPOCH + 1) as usize;
-                let slot_checkpoint = slot_previous + offset as u64 * SLOTS_PER_EPOCH;
-                if slot_previous % SLOTS_PER_EPOCH != 0
-                    || slot_next < slot_checkpoint
-                    || slot_next > slot_checkpoint + SLOTS_PER_EPOCH
-                    || gap
-                {
-                    Ok((slot_next, self.checkpoints[index_next]))
-                } else {
-                    Ok((slot_checkpoint, self.checkpoints[index_previous + offset]))
+                let maybe_next = self.slots.get(index);
+
+                let count = maybe_next
+                    .map(|(index_next, _slot)| *index_next)
+                    .unwrap_or(self.checkpoints.len())
+                    - index_previous;
+                for i in 1..count {
+                    let slot_next = slot_previous + i as u64 * SLOTS_PER_EPOCH;
+                    if slot <= slot_next {
+                        return Ok((slot_next, self.checkpoints[index_previous + i]));
+                    }
                 }
-            }
 
-            _ => {
-                let offset = ((slot - 1 - slot_last) / SLOTS_PER_EPOCH + 1) as usize;
-                let slot_checkpoint = slot_last + offset as u64 * SLOTS_PER_EPOCH;
-                let index = index_last + offset;
-                match self.checkpoints.get(index) {
-                    Some(checkpoint) => Ok((slot_checkpoint, *checkpoint)),
+                match maybe_next {
                     None => Err(CheckpointError::NotPresent),
+                    Some((index_next, slot_next)) => {
+                        Ok((*slot_next, self.checkpoints[*index_next]))
+                    }
                 }
             }
         }
@@ -423,3 +412,61 @@ fn checkpoints_with_gaps() {
 
     compare_checkpoints(&data, &checkpoints);
 }
+
+#[test]
+fn checkpoints_get() {
+    use hex_literal::hex;
+
+    const COUNT: usize = 7;
+
+    // Holesky
+    let data = [
+        (
+            2_498_432,
+            hex!("192cbc312720ee203ed023837c7dd7783db6cee1f1b9d57411f348e8a143a308").into(),
+        ),
+        (
+            2_498_464,
+            hex!("b89c6d200193f865b85a3f323b75d2b10346564a330229d8a5c695968206faf1").into(),
+        ),
+        (
+            2_498_496,
+            hex!("4185e76eb0865e9ae5f8ea7601407261d1db9e66ba10818ebe717976d9bf201c").into(),
+        ),
+        (
+            2_498_527,
+            hex!("e722020546e89a17228aa9365e5418aaf09d9c31b014a0b4df911a54702ccd57").into(),
+        ),
+        (
+            2_498_560,
+            hex!("b50cd206a8ba4019baad810bbcd4fe1871be4944ea9cb06e15259376e996afde").into(),
+        ),
+        (
+            2_498_592,
+            hex!("844300ded738bdad37cc202ad4ade0cc79f0e4aa311e8fee5668cb20341c52aa").into(),
+        ),
+        (
+            2_498_624,
+            hex!("aca973372ac65cd5203e1521ba941bbbf836c5e591a9b459ca061c79a5740023").into(),
+        ),
+    ];
+    assert_eq!(data.len(), COUNT);
+
+    let mut checkpoints = Checkpoints::<COUNT>::new();
+
+    for (slot, checkpoint) in &data {
+        checkpoints.push(*slot, *checkpoint);
+    }
+
+    assert!(checkpoints.checkpoint(2_498_625).is_err());
+
+    for i in 1..data.len() {
+        let (slot_previous, _checkpoint) = data[i - 1];
+        let (expected_slot, expected_checkpoint) = data[i];
+        for slot in (1 + slot_previous)..=expected_slot {
+            let (actual_slot, actual_checkpoint) = checkpoints.checkpoint(slot).unwrap();
+            assert_eq!(actual_slot, expected_slot, "slot = {slot}");
+            assert_eq!(actual_checkpoint, expected_checkpoint);
+        }
+    }
+}

gear-programs/checkpoint-light-client/src/wasm/sync_update.rs

@@ -3,6 +3,27 @@ use committee::{Error as CommitteeError, Update as CommitteeUpdate};
 use gstd::debug;
 
 pub async fn handle(state: &mut State<STORED_CHECKPOINTS_COUNT>, sync_update: SyncCommitteeUpdate) {
+    if eth_utils::calculate_epoch(state.finalized_header.slot) + io::sync_update::MAX_EPOCHS_GAP
+        <= eth_utils::calculate_epoch(sync_update.finalized_header.slot)
+    {
+        let result = HandleResult::SyncUpdate(Err(io::sync_update::Error::ReplayBackRequired {
+            replay_back: state
+                .replay_back
+                .as_ref()
+                .map(|replay_back| meta::ReplayBack {
+                    finalized_header: replay_back.finalized_header.slot,
+                    last_header: replay_back.last_header.slot,
+                }),
+            checkpoint: state
+                .checkpoints
+                .last()
+                .expect("The program should be initialized so there is a checkpoint"),
+        }));
+        msg::reply(result, 0).expect("Unable to reply with `HandleResult::SyncUpdate::Error`");
+
+        return;
+    }
+
     let (finalized_header_update, committee_update) = match verify(
         &state.network,
         &state.finalized_header,
@@ -23,28 +44,6 @@ pub async fn handle(state: &mut State<STORED_CHECKPOINTS_COUNT>, sync_update: Sy
     };
 
     if let Some(finalized_header) = finalized_header_update {
-        if eth_utils::calculate_epoch(state.finalized_header.slot) + io::sync_update::MAX_EPOCHS_GAP
-            <= eth_utils::calculate_epoch(finalized_header.slot)
-        {
-            let result =
-                HandleResult::SyncUpdate(Err(io::sync_update::Error::ReplayBackRequired {
-                    replay_back: state
-                        .replay_back
-                        .as_ref()
-                        .map(|replay_back| meta::ReplayBack {
-                            finalized_header: replay_back.finalized_header.slot,
-                            last_header: replay_back.last_header.slot,
-                        }),
-                    checkpoint: state
-                        .checkpoints
-                        .last()
-                        .expect("The program should be initialized so there is a checkpoint"),
-                }));
-            msg::reply(result, 0).expect("Unable to reply with `HandleResult::SyncUpdate::Error`");
-
-            return;
-        }
-
         state
             .checkpoints
             .push(finalized_header.slot, finalized_header.tree_hash_root());

relayer/src/ethereum_checkpoints/mod.rs

@@ -12,7 +12,7 @@ use futures::{
 };
 use gclient::{EventProcessor, GearApi, WSAddress};
 use parity_scale_codec::Decode;
-use reqwest::Client;
+use reqwest::{Client, ClientBuilder};
 use tokio::{
     signal::unix::{self, SignalKind},
     sync::mpsc::{self, Sender},
@@ -41,6 +41,7 @@ pub async fn relay(args: RelayCheckpointsArgs) {
     let RelayCheckpointsArgs {
         program_id,
         beacon_endpoint,
+        beacon_timeout,
         vara_domain,
         vara_port,
         vara_suri,
@@ -59,10 +60,14 @@ pub async fn relay(args: RelayCheckpointsArgs) {
         .and_then(|bytes| <[u8; 32]>::try_from(bytes).ok())
         .expect("Expecting correct ProgramId");
 
+    let client_http = ClientBuilder::new()
+        .timeout(Duration::from_secs(beacon_timeout))
+        .build()
+        .expect("Reqwest client should be created");
+
     let mut signal_interrupt = unix::signal(SignalKind::interrupt()).expect("Set SIGINT handler");
 
     let (sender, mut receiver) = mpsc::channel(SIZE_CHANNEL);
-    let client_http = Client::new();
 
     sync_update::spawn_receiver(client_http.clone(), beacon_endpoint.clone(), sender);
 

relayer/src/ethereum_checkpoints/replay_back.rs

@@ -126,6 +126,7 @@ async fn replay_back_slots(
     slots_batch_iter: SlotsBatchIter,
 ) -> AnyResult<()> {
     for (slot_start, slot_end) in slots_batch_iter {
+        log::debug!("slot_start = {slot_start}, slot_end = {slot_end}");
         replay_back_slots_inner(
             client_http,
             beacon_endpoint,

relayer/src/ethereum_checkpoints/tests/mod.rs

@@ -1,4 +1,4 @@
-use super::utils::{self, slots_batch, FinalityUpdateResponse};
+use super::utils::{self, slots_batch, BootstrapResponse, FinalityUpdateResponse, UpdateData};
 use checkpoint_light_client::WASM_BINARY;
 use checkpoint_light_client_io::{
     ethereum_common::{
@@ -19,6 +19,8 @@ const FINALITY_UPDATE_5_254_112: &[u8; 4_940] =
     include_bytes!("./sepolia-finality-update-5_254_112.json");
 const FINALITY_UPDATE_5_263_072: &[u8; 4_941] =
     include_bytes!("./sepolia-finality-update-5_263_072.json");
+const UPDATE_640: &[u8; 57_202] = include_bytes!("./sepolia-update-640.json");
+const BOOTSTRAP_640: &[u8; 54_328] = include_bytes!("./sepolia-bootstrap-640.json");
 
 async fn common_upload_program(
     client: &GearApi,
@@ -65,12 +67,13 @@ async fn init(network: Network) -> Result<()> {
 
     // use the latest finality header as a checkpoint for bootstrapping
     let finality_update = utils::get_finality_update(&client_http, RPC_URL).await?;
-    let current_period = eth_utils::calculate_period(finality_update.finalized_header.slot);
+    let slot = finality_update.finalized_header.slot;
+    let current_period = eth_utils::calculate_period(slot);
     let mut updates = utils::get_updates(&client_http, RPC_URL, current_period, 1).await?;
 
     println!(
         "finality_update slot = {}, period = {}",
-        finality_update.finalized_header.slot, current_period
+        slot, current_period
     );
 
     let update = match updates.pop() {
@@ -419,11 +422,8 @@ async fn replaying_back() -> Result<()> {
     Ok(())
 }
 
-#[ignore]
 #[tokio::test]
 async fn sync_update_requires_replaying_back() -> Result<()> {
-    let client_http = Client::new();
-
     let finality_update: FinalityUpdateResponse =
         serde_json::from_slice(FINALITY_UPDATE_5_263_072).unwrap();
     let finality_update = finality_update.data;
@@ -433,18 +433,25 @@ async fn sync_update_requires_replaying_back() -> Result<()> {
     );
 
     let slot = finality_update.finalized_header.slot;
-    let current_period = eth_utils::calculate_period(slot);
-    let mut updates = utils::get_updates(&client_http, RPC_URL, current_period, 1).await?;
+    let mut updates: Vec<UpdateData> = serde_json::from_slice(UPDATE_640).unwrap();
 
     let update = match updates.pop() {
         Some(update) if updates.is_empty() => update.data,
         _ => unreachable!("Requested single update"),
     };
 
-    let checkpoint = update.finalized_header.tree_hash_root();
-    let checkpoint_hex = hex::encode(checkpoint);
+    let BootstrapResponse { data: bootstrap } = serde_json::from_slice(BOOTSTRAP_640).unwrap();
+
+    let checkpoint_update = update.finalized_header.tree_hash_root();
+    let checkpoint_bootstrap = bootstrap.header.tree_hash_root();
+    assert_eq!(
+        checkpoint_update,
+        checkpoint_bootstrap,
+        "checkpoint_update = {}, checkpoint_bootstrap = {}",
+        hex::encode(checkpoint_update),
+        hex::encode(checkpoint_bootstrap)
+    );
 
-    let bootstrap = utils::get_bootstrap(&client_http, RPC_URL, &checkpoint_hex).await?;
     let signature = <G2 as ark_serialize::CanonicalDeserialize>::deserialize_compressed(
         &update.sync_aggregate.sync_committee_signature.0 .0[..],
     )
@@ -497,10 +504,13 @@ async fn sync_update_requires_replaying_back() -> Result<()> {
 
     let (_message_id, payload, _value) = listener.reply_bytes_on(message_id).await?;
     let result_decoded = HandleResult::decode(&mut &payload.unwrap()[..]).unwrap();
-    assert!(matches!(
-        result_decoded,
-        HandleResult::SyncUpdate(Err(sync_update::Error::ReplayBackRequired { .. }))
-    ));
+    assert!(
+        matches!(
+            result_decoded,
+            HandleResult::SyncUpdate(Err(sync_update::Error::ReplayBackRequired { .. }))
+        ),
+        "result_decoded = {result_decoded:?}"
+    );
 
     Ok(())
 }

relayer/src/main.rs

@@ -141,10 +141,14 @@ struct RelayCheckpointsArgs {
     #[arg(long, env = "CHECKPOINT_LIGHT_CLIENT_ADDRESS")]
     program_id: String,
 
-    /// Specify an endpoint providing Beacon API
+    /// Specify the endpoint providing Beacon API
     #[arg(long, env = "BEACON_ENDPOINT")]
     beacon_endpoint: String,
 
+    /// Specify the timeout in seconds for requests to the Beacon API endpoint
+    #[arg(long, default_value = "120", env = "BEACON_TIMEOUT")]
+    beacon_timeout: u64,
+
     /// Domain of the VARA RPC endpoint
     #[arg(long, default_value = "ws://127.0.0.1", env = "VARA_DOMAIN")]
     vara_domain: String,