diff --git a/executor/batch/handler.go b/executor/batch/handler.go
index e1b0ce2..2c044a7 100644
--- a/executor/batch/handler.go
+++ b/executor/batch/handler.go
@@ -181,7 +181,7 @@ func (bs *BatchSubmitter) finalizeBatch(ctx context.Context, blockHeight uint64)
 		Save:      true,
 	})
 
-	for offset := int64(0); ; offset += bs.batchCfg.MaxChunkSize {
+	for offset := int64(0); ; offset += int64(bs.batchCfg.MaxChunkSize) {
 		readLength, err := bs.batchFile.ReadAt(batchBuffer, offset)
 		if err != nil && err != io.EOF {
 			return err
@@ -202,7 +202,7 @@ func (bs *BatchSubmitter) finalizeBatch(ctx context.Context, blockHeight uint64)
 		})
 		checksum := sha256.Sum256(batchBuffer)
 		checksums = append(checksums, checksum[:])
-		if int64(readLength) < bs.batchCfg.MaxChunkSize {
+		if uint64(readLength) < bs.batchCfg.MaxChunkSize {
 			break
 		}
 	}
@@ -250,7 +250,7 @@ func (bs *BatchSubmitter) checkBatch(blockHeight uint64, blockTime time.Time) er
 	// then finalize the batch
 	if blockTime.After(bs.lastSubmissionTime.Add(bs.bridgeInfo.BridgeConfig.SubmissionInterval*2/3)) ||
 		blockTime.After(bs.lastSubmissionTime.Add(time.Duration(bs.batchCfg.MaxSubmissionTime)*time.Second)) ||
-		fileSize > (bs.batchCfg.MaxChunks-1)*bs.batchCfg.MaxChunkSize {
+		uint64(fileSize) > (bs.batchCfg.MaxChunks-1)*bs.batchCfg.MaxChunkSize {
 
 		// finalize the batch
 		bs.batchHeader.End = blockHeight
diff --git a/executor/executor.go b/executor/executor.go
index b561282..26e1e68 100644
--- a/executor/executor.go
+++ b/executor/executor.go
@@ -209,15 +209,13 @@ func (ex *Executor) getStartHeights(ctx context.Context, bridgeId uint64) (l1Sta
 
 	// get the last submitted output height before the start height from the host
 	if ex.cfg.L2StartHeight != 0 {
-		output, err := ex.host.QueryOutputByL2BlockNumber(ctx, bridgeId, uint64(ex.cfg.L2StartHeight))
+		output, err := ex.host.QueryOutputByL2BlockNumber(ctx, bridgeId, ex.cfg.L2StartHeight)
 		if err != nil {
 			return 0, 0, 0, 0, err
 		} else if output != nil {
 			l1StartHeight = output.OutputProposal.L1BlockNumber
 			l2StartHeight = output.OutputProposal.L2BlockNumber
 			startOutputIndex = output.OutputIndex + 1
-		} else {
-			startOutputIndex = 1
 		}
 	}
 	// get the last deposit tx height from the host
@@ -232,6 +230,11 @@ func (ex *Executor) getStartHeights(ctx context.Context, bridgeId uint64) (l1Sta
 	if l1StartHeight > depositTxHeight {
 		l1StartHeight = depositTxHeight
 	}
-	batchStartHeight = uint64(ex.cfg.BatchStartHeight) - 1
+	if l2StartHeight == 0 {
+		startOutputIndex = 1
+	}
+	if ex.cfg.BatchStartHeight > 0 {
+		batchStartHeight = ex.cfg.BatchStartHeight - 1
+	}
 	return l1StartHeight, l2StartHeight, startOutputIndex, batchStartHeight, err
 }
diff --git a/executor/types/config.go b/executor/types/config.go
index 41292e7..7b27541 100644
--- a/executor/types/config.go
+++ b/executor/types/config.go
@@ -60,20 +60,20 @@ type Config struct {
 	RelayOracle bool `json:"relay_oracle"`
 
 	// MaxChunks is the maximum number of chunks in a batch.
-	MaxChunks int64 `json:"max_chunks"`
+	MaxChunks uint64 `json:"max_chunks"`
 	// MaxChunkSize is the maximum size of a chunk in a batch.
-	MaxChunkSize int64 `json:"max_chunk_size"`
+	MaxChunkSize uint64 `json:"max_chunk_size"`
 	// MaxSubmissionTime is the maximum time to submit a batch.
-	MaxSubmissionTime int64 `json:"max_submission_time"` // seconds
+	MaxSubmissionTime uint64 `json:"max_submission_time"` // seconds
 
 	// L2StartHeight is the height to start the l2 node. 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.
 	// 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"`
+	L2StartHeight uint64 `json:"l2_start_height"`
 	// BatchStartHeight 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"`
+	BatchStartHeight uint64 `json:"batch_start_height"`
 }
 
 func DefaultConfig() *Config {
@@ -219,7 +219,7 @@ func (cfg Config) BatchConfig() BatchConfig {
 }
 
 type BatchConfig struct {
-	MaxChunks         int64 `json:"max_chunks"`
-	MaxChunkSize      int64 `json:"max_chunk_size"`
-	MaxSubmissionTime int64 `json:"max_submission_time"` // seconds
+	MaxChunks         uint64 `json:"max_chunks"`
+	MaxChunkSize      uint64 `json:"max_chunk_size"`
+	MaxSubmissionTime uint64 `json:"max_submission_time"` // seconds
 }
diff --git a/keys/keyring.go b/keys/keyring.go
index 3897b44..b8517a4 100644
--- a/keys/keyring.go
+++ b/keys/keyring.go
@@ -3,14 +3,20 @@ package keys
 import (
 	"io"
 
+	"path"
+
 	"github.com/cosmos/go-bip39"
 
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/crypto/keyring"
 )
 
+func GetKeyDir(homePath string) string {
+	return path.Join(homePath, ".keys")
+}
+
 func GetKeyBase(chainId string, dir string, cdc codec.Codec, userInput io.Reader) (keyring.Keyring, error) {
-	return keyring.New(chainId, "os", dir, userInput, cdc)
+	return keyring.New(chainId, "os", GetKeyDir(dir), userInput, cdc)
 }
 
 // CreateMnemonic generates a new mnemonic.
diff --git a/node/process.go b/node/process.go
index 2bd4827..04e8f27 100644
--- a/node/process.go
+++ b/node/process.go
@@ -195,7 +195,7 @@ func (n *Node) handleEvent(ctx context.Context, blockHeight uint64, latestHeight
 
 // txChecker checks pending txs and handle events if the tx is included in the block
 func (n *Node) txChecker(ctx context.Context) error {
-	if n.broadcaster != nil {
+	if n.broadcaster == nil {
 		return nil
 	}