feat: whitelisted system recipients

crates/rbuilder/src/building/mod.rs

@@ -120,6 +120,7 @@ pub struct BlockBuildingContext {
     pub mempool_tx_detector: Arc<MempoolTxsDetector>,
     pub faster_finalize: bool,
     pub adjustment_fee_payers: ahash::HashSet<Address>,
+    pub whitelisted_system_recipients: Vec<Address>,
     /// Cached from evm_env.block_env.number but as BlockNumber. Avoid conversions all over the code.
     block_number: BlockNumber,
 }
@@ -142,6 +143,7 @@ impl BlockBuildingContext {
         payload_id: InternalPayloadId,
         evm_caching_enable: bool,
         faster_finalize: bool,
+        whitelisted_system_recipients: Vec<Address>,
         adjustment_fee_payers: ahash::HashSet<Address>,
     ) -> Option<BlockBuildingContext> {
         let attributes = EthPayloadBuilderAttributes::try_new(
@@ -216,6 +218,7 @@ impl BlockBuildingContext {
             max_blob_gas_per_block,
             mempool_tx_detector: Arc::new(MempoolTxsDetector::new()),
             faster_finalize,
+            whitelisted_system_recipients,
             adjustment_fee_payers,
             block_number,
         })
@@ -321,6 +324,7 @@ impl BlockBuildingContext {
             max_blob_gas_per_block,
             mempool_tx_detector: Arc::new(MempoolTxsDetector::new()),
             faster_finalize: true,
+            whitelisted_system_recipients: Default::default(),
             adjustment_fee_payers: Default::default(),
             block_number,
         }

crates/rbuilder/src/building/order_commit.rs

@@ -1230,6 +1230,13 @@ impl<
                     Ok(ok) => {
                         let coinbase_profit = if !ok.tx_info.coinbase_profit.is_negative() {
                             ok.tx_info.coinbase_profit.unsigned_abs()
+                        } else if tx.tx_with_blobs.signer() == self.ctx.builder_signer.address
+                            && tx.tx_with_blobs.to().is_some_and(|to| {
+                                self.ctx.whitelisted_system_recipients.contains(&to)
+                            })
+                        {
+                            // This is a system transaction which should not be counted towards the block profit.
+                            U256::ZERO
                         } else {
                             return Ok(Err(OrderErr::NegativeProfit(
                                 ok.tx_info.coinbase_profit.unsigned_abs(),

crates/rbuilder/src/building/testing/test_chain_state.rs

@@ -408,6 +408,7 @@ impl TestBlockContextBuilder {
             true,
             true,
             Default::default(),
+            Default::default(),
         )
         .unwrap()
     }

crates/rbuilder/src/live_builder/base_config.rs

@@ -143,6 +143,9 @@ pub struct BaseConfig {
     /// See [OrderPool::time_to_keep_mempool_txs]
     pub time_to_keep_mempool_txs_secs: u64,
 
+    /// The array of senders incoming transactions from which will not be counted towards the coinbase profit.
+    pub whitelisted_system_recipients: Vec<Address>,
+
     // backtest config
     backtest_fetch_mempool_data_dir: EnvOrValue<String>,
     pub backtest_fetch_eth_rpc_url: String,
@@ -220,6 +223,7 @@ impl BaseConfig {
             coinbase_signer: self.coinbase_signer()?,
             extra_data: self.extra_data.clone(),
             blocklist_provider,
+            whitelisted_system_recipients: self.whitelisted_system_recipients.clone(),
 
             global_cancellation: cancellation_token,
 
@@ -495,6 +499,7 @@ impl Default for BaseConfig {
             evm_caching_enable: false,
             faster_finalize: false,
             time_to_keep_mempool_txs_secs: DEFAULT_TIME_TO_KEEP_MEMPOOL_TXS_SECS,
+            whitelisted_system_recipients: Vec::new(),
         }
     }
 }

crates/rbuilder/src/live_builder/mod.rs

@@ -129,6 +129,8 @@ where
     pub evm_caching_enable: bool,
     pub faster_finalize: bool,
     pub simulation_use_random_coinbase: bool,
+
+    pub whitelisted_system_recipients: Vec<Address>,
 }
 
 impl<P> LiveBuilder<P>
@@ -304,6 +306,7 @@ where
                 payload.payload_id,
                 self.evm_caching_enable,
                 self.faster_finalize,
+                self.whitelisted_system_recipients.clone(),
                 payload
                     .relay_registrations
                     .iter()