add batch start with l2 height flag to sync with l2

Author: sh-cha

executor/executor.go

@@ -211,5 +211,11 @@ func (ex *Executor) getStartHeights() (l1StartHeight uint64, l2StartHeight uint6
 	if ex.cfg.L2StartHeight != 0 {
 		l1StartHeight, l2StartHeight, err = ex.host.QueryHeightsOfOutputTxWithL2BlockNumber(uint64(ex.cfg.L2StartHeight))
 	}
-	return l1StartHeight, l2StartHeight, uint64(ex.cfg.BatchStartHeight), err
+
+	if ex.cfg.BatchStartWithL2Height {
+		batchStartHeight = l2StartHeight
+	} else {
+		batchStartHeight = uint64(ex.cfg.BatchStartHeight)
+	}
+	return l1StartHeight, l2StartHeight, batchStartHeight, err
 }

executor/types/config.go

@@ -57,6 +57,10 @@ type Config struct {
 	// L2 starts from the last submitted output l2 block number + 1 before L2StartHeight.
 	// L1 starts from the block number of the output tx + 1
 	L2StartHeight int64 `json:"l2_start_height"`
+	// BatchStartWithL2Height is the flag to start the batch same with the l2 height.
+	// If the latest height stored in the db is not 0, this config is ignored.
+	// If it is true, the batch will start from the last submitted output l2 block number + 1.
+	BatchStartWithL2Height bool `json:"batch_start_with_l2_height"`
 	// StartBatchHeight is the height to start the batch. If it is 0, it will start from the latest height.
 	// If the latest height stored in the db is not 0, this config is ignored.
 	BatchStartHeight int64 `json:"batch_start_height"`
@@ -97,8 +101,9 @@ func DefaultConfig() *Config {
 		MaxChunkSize:      300000,  // 300KB
 		MaxSubmissionTime: 60 * 60, // 1 hour
 
-		L2StartHeight:    0,
-		BatchStartHeight: 0,
+		L2StartHeight:          0,
+		BatchStartWithL2Height: false,
+		BatchStartHeight:       0,
 	}
 }