feat: implement flashblock sync over p2p (#288)

Author: noot

crates/op-rbuilder/src/builders/flashblocks/ctx.rs

@@ -0,0 +1,81 @@
+use crate::{
+    builders::{BuilderConfig, OpPayloadBuilderCtx, flashblocks::FlashblocksConfig},
+    gas_limiter::{AddressGasLimiter, args::GasLimiterArgs},
+    metrics::OpRBuilderMetrics,
+    traits::ClientBounds,
+};
+use op_revm::OpSpecId;
+use reth_basic_payload_builder::PayloadConfig;
+use reth_evm::EvmEnv;
+use reth_optimism_chainspec::OpChainSpec;
+use reth_optimism_evm::{OpEvmConfig, OpNextBlockEnvAttributes};
+use reth_optimism_payload_builder::{OpPayloadBuilderAttributes, config::OpDAConfig};
+use reth_optimism_primitives::OpTransactionSigned;
+use std::sync::Arc;
+use tokio_util::sync::CancellationToken;
+
+#[derive(Debug, Clone)]
+pub(super) struct OpPayloadSyncerCtx {
+    /// The type that knows how to perform system calls and configure the evm.
+    evm_config: OpEvmConfig,
+    /// The DA config for the payload builder
+    da_config: OpDAConfig,
+    /// The chainspec
+    chain_spec: Arc<OpChainSpec>,
+    /// Max gas that can be used by a transaction.
+    max_gas_per_txn: Option<u64>,
+    /// The metrics for the builder
+    metrics: Arc<OpRBuilderMetrics>,
+}
+
+impl OpPayloadSyncerCtx {
+    pub(super) fn new<Client>(
+        client: &Client,
+        builder_config: BuilderConfig<FlashblocksConfig>,
+        evm_config: OpEvmConfig,
+        metrics: Arc<OpRBuilderMetrics>,
+    ) -> eyre::Result<Self>
+    where
+        Client: ClientBounds,
+    {
+        let chain_spec = client.chain_spec();
+        Ok(Self {
+            evm_config,
+            da_config: builder_config.da_config.clone(),
+            chain_spec,
+            max_gas_per_txn: builder_config.max_gas_per_txn,
+            metrics,
+        })
+    }
+
+    pub(super) fn evm_config(&self) -> &OpEvmConfig {
+        &self.evm_config
+    }
+
+    pub(super) fn max_gas_per_txn(&self) -> Option<u64> {
+        self.max_gas_per_txn
+    }
+
+    pub(super) fn into_op_payload_builder_ctx(
+        self,
+        payload_config: PayloadConfig<OpPayloadBuilderAttributes<OpTransactionSigned>>,
+        evm_env: EvmEnv<OpSpecId>,
+        block_env_attributes: OpNextBlockEnvAttributes,
+        cancel: CancellationToken,
+    ) -> OpPayloadBuilderCtx {
+        OpPayloadBuilderCtx {
+            evm_config: self.evm_config,
+            da_config: self.da_config,
+            chain_spec: self.chain_spec,
+            config: payload_config,
+            evm_env,
+            block_env_attributes,
+            cancel,
+            builder_signer: None,
+            metrics: self.metrics,
+            extra_ctx: (),
+            max_gas_per_txn: self.max_gas_per_txn,
+            address_gas_limiter: AddressGasLimiter::new(GasLimiterArgs::default()),
+        }
+    }
+}

crates/op-rbuilder/src/builders/flashblocks/mod.rs

@@ -6,6 +6,7 @@ use service::FlashblocksServiceBuilder;
 mod best_txs;
 mod builder_tx;
 mod config;
+mod ctx;
 mod p2p;
 mod payload;
 mod payload_handler;

crates/op-rbuilder/src/builders/flashblocks/payload.rs

@@ -158,8 +158,8 @@ impl<Pool, Client, BuilderTx> OpPayloadBuilder<Pool, Client, BuilderTx> {
         config: BuilderConfig<FlashblocksConfig>,
         builder_tx: BuilderTx,
         payload_tx: mpsc::Sender<OpBuiltPayload>,
+        metrics: Arc<OpRBuilderMetrics>,
     ) -> eyre::Result<Self> {
-        let metrics = Arc::new(OpRBuilderMetrics::default());
         let ws_pub = WebSocketPublisher::new(config.specific.ws_addr, Arc::clone(&metrics))?.into();
         let address_gas_limiter = AddressGasLimiter::new(config.gas_limiter_config.clone());
         Ok(Self {
@@ -710,7 +710,7 @@ where
 
         match build_result {
             Err(err) => {
-                ctx.metrics.invalid_blocks_count.increment(1);
+                ctx.metrics.invalid_built_blocks_count.increment(1);
                 Err(err).wrap_err("failed to build payload")
             }
             Ok((new_payload, mut fb_payload)) => {