Implement engine_getBlobsV1 (#9723)

Co-authored-by: Matthias Seitz <[email protected]>

crates/node/builder/src/launch/engine.rs

@@ -267,6 +267,7 @@ where
             ctx.chain_spec(),
             beacon_engine_handle,
             ctx.components().payload_builder().clone().into(),
+            ctx.components().pool().clone(),
             Box::new(ctx.task_executor().clone()),
             client,
             EngineCapabilities::default(),

crates/node/builder/src/launch/mod.rs

@@ -352,6 +352,7 @@ where
             ctx.chain_spec(),
             beacon_engine_handle,
             ctx.components().payload_builder().clone().into(),
+            ctx.components().pool().clone(),
             Box::new(ctx.task_executor().clone()),
             client,
             EngineCapabilities::default(),

crates/rpc/rpc-api/src/engine.rs

@@ -14,8 +14,8 @@ use reth_rpc_types::{
         ForkchoiceState, ForkchoiceUpdated, PayloadId, PayloadStatus, TransitionConfiguration,
     },
     state::StateOverride,
-    BlockOverrides, EIP1186AccountProofResponse, Filter, JsonStorageKey, Log, SyncStatus,
-    TransactionRequest,
+    BlobAndProofV1, BlockOverrides, EIP1186AccountProofResponse, Filter, JsonStorageKey, Log,
+    SyncStatus, TransactionRequest,
 };
 // NOTE: We can't use associated types in the `EngineApi` trait because of jsonrpsee, so we use a
 // generic here. It would be nice if the rpc macro would understand which types need to have serde.
@@ -213,6 +213,13 @@ pub trait EngineApi<Engine: EngineTypes> {
     /// See also <https://github.com/ethereum/execution-apis/blob/6452a6b194d7db269bf1dbd087a267251d3cc7f8/src/engine/common.md#capabilities>
     #[method(name = "exchangeCapabilities")]
     async fn exchange_capabilities(&self, capabilities: Vec<String>) -> RpcResult<Vec<String>>;
+
+    /// Fetch blobs for the consensus layer from the in-memory blob cache.
+    #[method(name = "getBlobsV1")]
+    async fn get_blobs_v1(
+        &self,
+        transaction_ids: Vec<B256>,
+    ) -> RpcResult<Vec<Option<BlobAndProofV1>>>;
 }
 
 /// A subset of the ETH rpc interface: <https://ethereum.github.io/execution-apis/api-documentation/>

crates/rpc/rpc-builder/tests/it/utils.rs

@@ -17,7 +17,10 @@ use reth_rpc_layer::JwtSecret;
 use reth_rpc_server_types::RpcModuleSelection;
 use reth_rpc_types::engine::{ClientCode, ClientVersionV1};
 use reth_tasks::TokioTaskExecutor;
-use reth_transaction_pool::test_utils::{TestPool, TestPoolBuilder};
+use reth_transaction_pool::{
+    noop::NoopTransactionPool,
+    test_utils::{TestPool, TestPoolBuilder},
+};
 use tokio::sync::mpsc::unbounded_channel;
 
 /// Localhost with port 0 so a free port is used.
@@ -43,6 +46,7 @@ pub async fn launch_auth(secret: JwtSecret) -> AuthServerHandle {
         MAINNET.clone(),
         beacon_engine_handle,
         spawn_test_payload_service().into(),
+        NoopTransactionPool::default(),
         Box::<TokioTaskExecutor>::default(),
         client,
         EngineCapabilities::default(),

crates/rpc/rpc-engine-api/Cargo.toml

@@ -25,6 +25,7 @@ reth-tasks.workspace = true
 reth-rpc-types-compat.workspace = true
 reth-engine-primitives.workspace = true
 reth-evm.workspace = true
+reth-transaction-pool.workspace = true
 
 # async
 tokio = { workspace = true, features = ["sync"] }

crates/rpc/rpc-engine-api/src/capabilities.rs

@@ -19,6 +19,7 @@ pub const CAPABILITIES: &[&str] = &[
     "engine_getPayloadBodiesByRangeV1",
     "engine_getPayloadBodiesByHashV2",
     "engine_getPayloadBodiesByRangeV2",
+    "engine_getBlobsV1",
 ];
 
 // The list of all supported Engine capabilities available over the engine endpoint.

crates/rpc/rpc-engine-api/src/engine_api.rs

@@ -16,17 +16,21 @@ use reth_primitives::{
     Block, BlockHash, BlockHashOrNumber, BlockNumber, EthereumHardfork, B256, U64,
 };
 use reth_rpc_api::EngineApiServer;
-use reth_rpc_types::engine::{
-    CancunPayloadFields, ClientVersionV1, ExecutionPayload, ExecutionPayloadBodiesV1,
-    ExecutionPayloadBodiesV2, ExecutionPayloadInputV2, ExecutionPayloadV1, ExecutionPayloadV3,
-    ExecutionPayloadV4, ForkchoiceState, ForkchoiceUpdated, PayloadId, PayloadStatus,
-    TransitionConfiguration,
+use reth_rpc_types::{
+    engine::{
+        CancunPayloadFields, ClientVersionV1, ExecutionPayload, ExecutionPayloadBodiesV1,
+        ExecutionPayloadBodiesV2, ExecutionPayloadInputV2, ExecutionPayloadV1, ExecutionPayloadV3,
+        ExecutionPayloadV4, ForkchoiceState, ForkchoiceUpdated, PayloadId, PayloadStatus,
+        TransitionConfiguration,
+    },
+    BlobAndProofV1,
 };
 use reth_rpc_types_compat::engine::payload::{
     convert_payload_input_v2_to_payload, convert_to_payload_body_v1, convert_to_payload_body_v2,
 };
 use reth_storage_api::{BlockReader, HeaderProvider, StateProviderFactory};
 use reth_tasks::TaskSpawner;
+use reth_transaction_pool::TransactionPool;
 use std::{sync::Arc, time::Instant};
 use tokio::sync::oneshot;
 use tracing::{trace, warn};
@@ -37,13 +41,16 @@ pub type EngineApiSender<Ok> = oneshot::Sender<EngineApiResult<Ok>>;
 /// The upper limit for payload bodies request.
 const MAX_PAYLOAD_BODIES_LIMIT: u64 = 1024;
 
+/// The upper limit blobs `eth_getBlobs`.
+const MAX_BLOB_LIMIT: usize = 128;
+
 /// The Engine API implementation that grants the Consensus layer access to data and
 /// functions in the Execution layer that are crucial for the consensus process.
-pub struct EngineApi<Provider, EngineT: EngineTypes> {
-    inner: Arc<EngineApiInner<Provider, EngineT>>,
+pub struct EngineApi<Provider, EngineT: EngineTypes, Pool> {
+    inner: Arc<EngineApiInner<Provider, EngineT, Pool>>,
 }
 
-struct EngineApiInner<Provider, EngineT: EngineTypes> {
+struct EngineApiInner<Provider, EngineT: EngineTypes, Pool> {
     /// The provider to interact with the chain.
     provider: Provider,
     /// Consensus configuration
@@ -60,19 +67,24 @@ struct EngineApiInner<Provider, EngineT: EngineTypes> {
     client: ClientVersionV1,
     /// The list of all supported Engine capabilities available over the engine endpoint.
     capabilities: EngineCapabilities,
+    /// Transaction pool.
+    tx_pool: Pool,
 }
 
-impl<Provider, EngineT> EngineApi<Provider, EngineT>
+impl<Provider, EngineT, Pool> EngineApi<Provider, EngineT, Pool>
 where
     Provider: HeaderProvider + BlockReader + StateProviderFactory + EvmEnvProvider + 'static,
     EngineT: EngineTypes,
+    Pool: TransactionPool + 'static,
 {
     /// Create new instance of [`EngineApi`].
+    #[allow(clippy::too_many_arguments)]
     pub fn new(
         provider: Provider,
         chain_spec: Arc<ChainSpec>,
         beacon_consensus: BeaconConsensusEngineHandle<EngineT>,
         payload_store: PayloadStore<EngineT>,
+        tx_pool: Pool,
         task_spawner: Box<dyn TaskSpawner>,
         client: ClientVersionV1,
         capabilities: EngineCapabilities,
@@ -86,6 +98,7 @@ where
             metrics: EngineApiMetrics::default(),
             client,
             capabilities,
+            tx_pool,
         });
         Self { inner }
     }
@@ -609,10 +622,11 @@ where
 }
 
 #[async_trait]
-impl<Provider, EngineT> EngineApiServer<EngineT> for EngineApi<Provider, EngineT>
+impl<Provider, EngineT, Pool> EngineApiServer<EngineT> for EngineApi<Provider, EngineT, Pool>
 where
     Provider: HeaderProvider + BlockReader + StateProviderFactory + EvmEnvProvider + 'static,
     EngineT: EngineTypes,
+    Pool: TransactionPool + 'static,
 {
     /// Handler for `engine_newPayloadV1`
     /// See also <https://github.com/ethereum/execution-apis/blob/3d627c95a4d3510a8187dd02e0250ecb4331d27e/src/engine/paris.md#engine_newpayloadv1>
@@ -904,9 +918,25 @@ where
     async fn exchange_capabilities(&self, _capabilities: Vec<String>) -> RpcResult<Vec<String>> {
         Ok(self.inner.capabilities.list())
     }
+
+    async fn get_blobs_v1(
+        &self,
+        versioned_hashes: Vec<B256>,
+    ) -> RpcResult<Vec<Option<BlobAndProofV1>>> {
+        trace!(target: "rpc::engine", "Serving engine_getBlobsV1");
+        if versioned_hashes.len() > MAX_BLOB_LIMIT {
+            return Err(EngineApiError::BlobRequestTooLarge { len: versioned_hashes.len() }.into())
+        }
+
+        Ok(self
+            .inner
+            .tx_pool
+            .get_blobs_for_versioned_hashes(&versioned_hashes)
+            .map_err(|err| EngineApiError::Internal(Box::new(err)))?)
+    }
 }
 
-impl<Provider, EngineT> std::fmt::Debug for EngineApi<Provider, EngineT>
+impl<Provider, EngineT, Pool> std::fmt::Debug for EngineApi<Provider, EngineT, Pool>
 where
     EngineT: EngineTypes,
 {
@@ -920,20 +950,21 @@ mod tests {
     use super::*;
     use assert_matches::assert_matches;
     use reth_beacon_consensus::{BeaconConsensusEngineEvent, BeaconEngineMessage};
-    use reth_ethereum_engine_primitives::EthEngineTypes;
-    use reth_testing_utils::generators::random_block;
-
     use reth_chainspec::MAINNET;
+    use reth_ethereum_engine_primitives::EthEngineTypes;
     use reth_payload_builder::test_utils::spawn_test_payload_service;
     use reth_primitives::SealedBlock;
     use reth_provider::test_utils::MockEthProvider;
     use reth_rpc_types::engine::{ClientCode, ClientVersionV1};
     use reth_rpc_types_compat::engine::payload::execution_payload_from_sealed_block;
     use reth_tasks::TokioTaskExecutor;
+    use reth_testing_utils::generators::random_block;
     use reth_tokio_util::EventSender;
+    use reth_transaction_pool::noop::NoopTransactionPool;
     use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver};
 
-    fn setup_engine_api() -> (EngineApiTestHandle, EngineApi<Arc<MockEthProvider>, EthEngineTypes>)
+    fn setup_engine_api(
+    ) -> (EngineApiTestHandle, EngineApi<Arc<MockEthProvider>, EthEngineTypes, NoopTransactionPool>)
     {
         let client = ClientVersionV1 {
             code: ClientCode::RH,
@@ -953,6 +984,7 @@ mod tests {
             chain_spec.clone(),
             BeaconConsensusEngineHandle::new(to_engine, event_sender),
             payload_store.into(),
+            NoopTransactionPool::default(),
             task_executor,
             client,
             EngineCapabilities::default(),

crates/rpc/rpc-engine-api/src/error.rs

@@ -42,6 +42,12 @@ pub enum EngineApiError {
         /// The length that was requested.
         len: u64,
     },
+    /// Too many requested versioned hashes for blobs request
+    #[error("requested blob count too large: {len}")]
+    BlobRequestTooLarge {
+        /// The length that was requested.
+        len: usize,
+    },
     /// Thrown if `engine_getPayloadBodiesByRangeV1` contains an invalid range
     #[error("invalid start ({start}) or count ({count})")]
     InvalidBodiesRange {
@@ -145,7 +151,8 @@ impl From<EngineApiError> for jsonrpsee_types::error::ErrorObject<'static> {
                 error.to_string(),
                 None::<()>,
             ),
-            EngineApiError::PayloadRequestTooLarge { .. } => {
+            EngineApiError::PayloadRequestTooLarge { .. } |
+            EngineApiError::BlobRequestTooLarge { .. } => {
                 jsonrpsee_types::error::ErrorObject::owned(
                     REQUEST_TOO_LARGE_CODE,
                     REQUEST_TOO_LARGE_MESSAGE,

crates/rpc/rpc-types/Cargo.toml

@@ -14,6 +14,7 @@ workspace = true
 [dependencies]
 
 # ethereum
+alloy-eips.workspace = true
 alloy-primitives = { workspace = true, features = ["rand", "rlp", "serde"] }
 alloy-rpc-types.workspace = true
 alloy-rpc-types-admin.workspace = true
@@ -32,6 +33,7 @@ op-alloy-rpc-types-engine.workspace = true
 
 # misc
 jsonrpsee-types = { workspace = true, optional = true }
+serde.workspace = true
 
 [dev-dependencies]
 # misc

crates/rpc/rpc-types/src/lib.rs

@@ -61,6 +61,18 @@ pub use eth::{
     },
 };
 
+use alloy_eips::eip4844::{Blob, Bytes48};
+use serde::{Deserialize, Serialize};
+
+/// Blob type returned in responses to `engine_getBlobsV1`: <https://github.com/ethereum/execution-apis/pull/559>
+#[derive(Debug, Serialize, Deserialize, Clone)]
+pub struct BlobAndProofV1 {
+    /// The blob data.
+    pub blob: Box<Blob>,
+    /// The KZG proof for the blob.
+    pub proof: Bytes48,
+}
+
 /// Optimism specific rpc types.
 pub mod optimism {
     pub use op_alloy_rpc_types::*;

crates/transaction-pool/Cargo.toml

@@ -18,6 +18,7 @@ reth-chainspec.workspace = true
 reth-eth-wire-types.workspace = true
 reth-primitives = { workspace = true, features = ["c-kzg", "secp256k1"] }
 reth-execution-types.workspace = true
+reth-rpc-types.workspace = true
 reth-fs-util.workspace = true
 reth-storage-api.workspace = true
 reth-tasks.workspace = true

crates/transaction-pool/src/blobstore/disk.rs

@@ -5,6 +5,7 @@ use alloy_primitives::{TxHash, B256};
 use alloy_rlp::{Decodable, Encodable};
 use parking_lot::{Mutex, RwLock};
 use reth_primitives::BlobTransactionSidecar;
+use reth_rpc_types::BlobAndProofV1;
 use schnellru::{ByLength, LruMap};
 use std::{collections::HashSet, fmt, fs, io, path::PathBuf, sync::Arc};
 use tracing::{debug, trace};
@@ -128,6 +129,31 @@ impl BlobStore for DiskFileBlobStore {
         self.inner.get_exact(txs)
     }
 
+    fn get_by_versioned_hashes(
+        &self,
+        versioned_hashes: &[B256],
+    ) -> Result<Vec<Option<BlobAndProofV1>>, BlobStoreError> {
+        let mut result = vec![None; versioned_hashes.len()];
+        for (_tx_hash, blob_sidecar) in self.inner.blob_cache.lock().iter() {
+            for (i, blob_versioned_hash) in blob_sidecar.versioned_hashes().enumerate() {
+                for (j, target_versioned_hash) in versioned_hashes.iter().enumerate() {
+                    if blob_versioned_hash == *target_versioned_hash {
+                        result[j].get_or_insert_with(|| BlobAndProofV1 {
+                            blob: Box::new(blob_sidecar.blobs[i]),
+                            proof: blob_sidecar.proofs[i],
+                        });
+                    }
+                }
+            }
+
+            // Return early if all blobs are found.
+            if result.iter().all(|blob| blob.is_some()) {
+                break;
+            }
+        }
+        Ok(result)
+    }
+
     fn data_size_hint(&self) -> Option<usize> {
         Some(self.inner.size_tracker.data_size())
     }