fix(chunk proposer): treat L2 tx gas check as soft limit (#602)

bridge/internal/controller/watcher/chunk_proposer.go

@@ -106,15 +106,6 @@ func (p *ChunkProposer) proposeChunk() (*bridgeTypes.Chunk, error) {
 		)
 	}
 
-	if totalTxGasUsed > p.maxTxGasPerChunk {
-		return nil, fmt.Errorf(
-			"the first block exceeds l2 tx gas limit; block number: %v, gas used: %v, max gas limit: %v",
-			firstBlock.Header.Number,
-			totalTxGasUsed,
-			p.maxTxGasPerChunk,
-		)
-	}
-
 	if totalL1CommitGas > p.maxL1CommitGasPerChunk {
 		return nil, fmt.Errorf(
 			"the first block exceeds l1 commit gas limit; block number: %v, commit gas: %v, max commit gas limit: %v",
@@ -133,6 +124,16 @@ func (p *ChunkProposer) proposeChunk() (*bridgeTypes.Chunk, error) {
 		)
 	}
 
+	// Check if the first block breaks any soft limits.
+	if totalTxGasUsed > p.maxTxGasPerChunk {
+		log.Warn(
+			"The first block in chunk exceeds l2 tx gas limit",
+			"block number", firstBlock.Header.Number,
+			"gas used", totalTxGasUsed,
+			"max gas limit", p.maxTxGasPerChunk,
+		)
+	}
+
 	for i, block := range blocks[1:] {
 		totalTxGasUsed += block.Header.GasUsed
 		totalL2TxNum += block.L2TxsNum()

common/version/version.go

@@ -5,7 +5,7 @@ import (
 	"runtime/debug"
 )
 
-var tag = "v4.0.3"
+var tag = "v4.0.4"
 
 var commit = func() string {
 	if info, ok := debug.ReadBuildInfo(); ok {