feat: add transaction gas limit

crates/op-rbuilder/src/args/op.rs

@@ -30,6 +30,10 @@ pub struct OpRbuilderArgs {
     )]
     pub chain_block_time: u64,
 
+    /// max gas a transaction can use
+    #[arg(long = "builder.max-gas-usage", default_value = "25000")]
+    pub max_gas_per_txn: u64,
+
     /// Signals whether to log pool transaction events
     #[arg(long = "builder.log-pool-transactions", default_value = "false")]
     pub log_pool_transactions: bool,

crates/op-rbuilder/src/builders/context.rs

@@ -70,6 +70,8 @@ pub struct OpPayloadBuilderCtx<ExtraCtx: Debug + Default = ()> {
     pub metrics: Arc<OpRBuilderMetrics>,
     /// Extra context for the payload builder
     pub extra_ctx: ExtraCtx,
+    /// Max gas that can be used by a transaction.
+    pub max_gas_per_txn: u64,
 }
 
 impl<ExtraCtx: Debug + Default> OpPayloadBuilderCtx<ExtraCtx> {
@@ -566,6 +568,10 @@ impl<ExtraCtx: Debug + Default> OpPayloadBuilderCtx<ExtraCtx> {
 
                 // Add gas used by the transaction to cumulative gas used, before creating the receipt
                 let gas_used = result.gas_used();
+                if gas_used > self.max_gas_per_txn {
+                    info!("builder txn took execessive gas. not included in block");
+                    return Ok(());
+                }
                 info.cumulative_gas_used += gas_used;
 
                 let ctx = ReceiptBuilderCtx {

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

@@ -251,6 +251,7 @@ where
                 flashblock_index: 0,
                 target_flashblock_count: self.config.flashblocks_per_block(),
             },
+            max_gas_per_txn: self.config.max_gas_per_txn,
         };
 
         let state_provider = self.client.state_by_block_hash(ctx.parent().hash())?;

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

@@ -112,6 +112,8 @@ pub struct BuilderConfig<Specific: Clone> {
 
     /// Configuration values that are specific to the block builder implementation used.
     pub specific: Specific,
+    /// Maximum gas a transaction can use before being excluded.
+    pub max_gas_per_txn: u64,
 }
 
 impl<S: Debug + Clone> core::fmt::Debug for BuilderConfig<S> {
@@ -145,6 +147,7 @@ impl<S: Default + Clone> Default for BuilderConfig<S> {
             da_config: OpDAConfig::default(),
             specific: S::default(),
             sampling_ratio: 100,
+            max_gas_per_txn: 25_000,
         }
     }
 }
@@ -164,6 +167,7 @@ where
             block_time_leeway: Duration::from_secs(args.extra_block_deadline_secs),
             da_config: Default::default(),
             sampling_ratio: args.telemetry.sampling_ratio,
+            max_gas_per_txn: args.max_gas_per_txn,
             specific: S::try_from(args)?,
         })
     }

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

@@ -275,6 +275,7 @@ where
             builder_signer: self.config.builder_signer,
             metrics: self.metrics.clone(),
             extra_ctx: Default::default(),
+            max_gas_per_txn: self.config.max_gas_per_txn,
         };
 
         let builder = OpBuilder::new(best);