diff --git a/contracts/gateway/LineaL1Gateway.sol b/contracts/gateway/LineaL1Gateway.sol
index 41ad73f..b5d8f53 100644
--- a/contracts/gateway/LineaL1Gateway.sol
+++ b/contracts/gateway/LineaL1Gateway.sol
@@ -16,19 +16,20 @@ contract LineaL1Gateway is ZkLinkAcceptor, LineaGateway, ILineaL1Gateway {
     uint64 public fee;
 
     /// @notice Used to prevent off-chain monitoring events from being lost
-    uint192 public txNonce;
+    uint32 public txNonce;
 
     function depositETH(bytes32 _zkLinkAddress, uint8 _subAccountId) external payable override nonReentrant whenNotPaused {
         // ensure amount bridged is not zero
         require(msg.value > fee, "Value too low");
         uint256 amount = msg.value - fee;
 
-        bytes memory callData = abi.encodeCall(ILineaL2Gateway.claimETHCallback, (_zkLinkAddress, _subAccountId, amount));
+        uint32 _txNonce = txNonce;
+        bytes memory callData = abi.encodeCall(ILineaL2Gateway.claimETHCallback, (_txNonce, _zkLinkAddress, _subAccountId, amount));
         // transfer no fee to Linea
         messageService.sendMessage{value: amount}(remoteGateway, 0, callData);
 
-        emit Deposit(txNonce, ETH_ADDRESS, amount, _zkLinkAddress, _subAccountId, false);
-        txNonce++;
+        emit Deposit(_txNonce, ETH_ADDRESS, amount, _zkLinkAddress, _subAccountId, false);
+        txNonce = _txNonce + 1;
     }
 
     function depositERC20(address _token, uint256 _amount, bytes32 _zkLinkAddress, uint8 _subAccountId, bool _mapping) external payable override nonReentrant whenNotPaused {
@@ -47,11 +48,12 @@ contract LineaL1Gateway is ZkLinkAcceptor, LineaGateway, ILineaL1Gateway {
         (bool isUSDC, address nativeToken) = bridgeERC20ToRemoteGateway(_token, _amount, 0);
 
         // send depositERC20 command to LineaL2Gateway(the second message send to Linea)
-        bytes memory executeData = abi.encodeCall(ILineaL2Gateway.claimERC20Callback, (isUSDC, nativeToken, _amount, _zkLinkAddress, _subAccountId, _mapping));
+        uint32 _txNonce = txNonce;
+        bytes memory executeData = abi.encodeCall(ILineaL2Gateway.claimERC20Callback, (_txNonce, isUSDC, nativeToken, _amount, _zkLinkAddress, _subAccountId, _mapping));
         messageService.sendMessage(remoteGateway, 0, executeData);
 
-        emit Deposit(txNonce, _token, _amount, _zkLinkAddress, _subAccountId, _mapping);
-        txNonce++;
+        emit Deposit(_txNonce, _token, _amount, _zkLinkAddress, _subAccountId, _mapping);
+        txNonce = _txNonce + 1;
     }
 
     function claimETHCallback(address _owner, uint128 _amount, uint32 _accountIdOfNonce, uint8 _subAccountIdOfNonce, uint32 _nonce, uint16 _fastWithdrawFeeRate) external payable override onlyMessageService onlyRemoteGateway {
diff --git a/contracts/gateway/LineaL2Gateway.sol b/contracts/gateway/LineaL2Gateway.sol
index dfcd397..c77bb01 100644
--- a/contracts/gateway/LineaL2Gateway.sol
+++ b/contracts/gateway/LineaL2Gateway.sol
@@ -21,14 +21,14 @@ contract LineaL2Gateway is LineaGateway, ILineaL2Gateway {
         _;
     }
 
-    function claimETHCallback(bytes32 _zkLinkAddress, uint8 _subAccountId, uint256 _amount) external payable onlyMessageService onlyRemoteGateway {
+    function claimETHCallback(uint32 _txNonce, bytes32 _zkLinkAddress, uint8 _subAccountId, uint256 _amount) external payable onlyMessageService onlyRemoteGateway {
         require(msg.value == _amount, "Claim eth value not match");
 
         zkLink.depositETH{value: _amount}(_zkLinkAddress, _subAccountId);
-        emit ClaimedDepositETH(_zkLinkAddress, _subAccountId, _amount);
+        emit ClaimedDeposit(_txNonce);
     }
 
-    function claimERC20Callback(bool _isUSDC, address _nativeToken, uint256 _amount, bytes32 _zkLinkAddress, uint8 _subAccountId, bool _mapping) external override onlyMessageService onlyRemoteGateway {
+    function claimERC20Callback(uint32 _txNonce, bool _isUSDC, address _nativeToken, uint256 _amount, bytes32 _zkLinkAddress, uint8 _subAccountId, bool _mapping) external override onlyMessageService onlyRemoteGateway {
         // find target token on Linea
         address targetToken = getTargetToken(_isUSDC, _nativeToken);
         // approve token to zkLink
@@ -36,7 +36,7 @@ contract LineaL2Gateway is LineaGateway, ILineaL2Gateway {
         // deposit erc20 to zkLink
         uint104 amount = uint104(_amount);
         zkLink.depositERC20(IERC20(targetToken), amount, _zkLinkAddress, _subAccountId, _mapping);
-        emit ClaimedDepositERC20(targetToken, amount, _zkLinkAddress, _subAccountId, _mapping);
+        emit ClaimedDeposit(_txNonce);
     }
 
     function withdrawETH(address _owner, uint128 _amount, uint32 _accountIdOfNonce, uint8 _subAccountIdOfNonce, uint32 _nonce, uint16 _fastWithdrawFeeRate) external payable override onlyZkLink whenNotPaused {
diff --git a/contracts/interfaces/ILineaL1Gateway.sol b/contracts/interfaces/ILineaL1Gateway.sol
index 1bd3bce..1847c9b 100644
--- a/contracts/interfaces/ILineaL1Gateway.sol
+++ b/contracts/interfaces/ILineaL1Gateway.sol
@@ -4,7 +4,7 @@ pragma solidity ^0.8.0;
 import {ILineaGateway} from "./ILineaGateway.sol";
 
 interface ILineaL1Gateway is ILineaGateway {
-    event Deposit(uint192 indexed txNonce, address token, uint256 amount, bytes32 zklinkAddress, uint8 subAccountId, bool _mapping);
+    event Deposit(uint32 indexed txNonce, address token, uint256 amount, bytes32 zklinkAddress, uint8 subAccountId, bool _mapping);
     event ClaimedWithdrawETH(address _receiver, uint256 _amount);
     event ClaimedWithdrawERC20(address _receiver, address _token, uint256 _amount);
     event SetFee(uint64 fee);
diff --git a/contracts/interfaces/ILineaL2Gateway.sol b/contracts/interfaces/ILineaL2Gateway.sol
index 50525a0..3e45923 100644
--- a/contracts/interfaces/ILineaL2Gateway.sol
+++ b/contracts/interfaces/ILineaL2Gateway.sol
@@ -5,22 +5,23 @@ import {IL2Gateway} from "./IL2Gateway.sol";
 import {ILineaGateway} from "./ILineaGateway.sol";
 
 interface ILineaL2Gateway is ILineaGateway, IL2Gateway {
-    event ClaimedDepositETH(bytes32 _zkLinkAddress, uint8 _subAccountId, uint256 _amount);
-    event ClaimedDepositERC20(address _token, uint104 _amount, bytes32 _zkLinkAddress, uint8 _subAccountId, bool _mapping);
+    event ClaimedDeposit(uint32 indexed _txNonce);
     event SetZkLink(address _zkLink);
 
     /// @notice Claim ETH callback from message service
+    /// @param _txNonce The deposit sequence of L1 gateway
     /// @param _zkLinkAddress The zkLink address deposited to
     /// @param _subAccountId The sub account id
     /// @param _amount The eth amount to deposit
-    function claimETHCallback(bytes32 _zkLinkAddress, uint8 _subAccountId, uint256 _amount) external payable;
+    function claimETHCallback(uint32 _txNonce, bytes32 _zkLinkAddress, uint8 _subAccountId, uint256 _amount) external payable;
 
     /// @notice Claim ERC20 callback from message service
+    /// @param _txNonce The deposit sequence of L1 gateway
     /// @param _isUSDC True when the native token is usdc
     /// @param _nativeToken The native token
     /// @param _amount The amount to deposit
     /// @param _zkLinkAddress The zkLink address deposited to
     /// @param _subAccountId The sub account id
     /// @param _mapping If receive a mapping token on zkLink
-    function claimERC20Callback(bool _isUSDC, address _nativeToken, uint256 _amount, bytes32 _zkLinkAddress, uint8 _subAccountId, bool _mapping) external;
+    function claimERC20Callback(uint32 _txNonce, bool _isUSDC, address _nativeToken, uint256 _amount, bytes32 _zkLinkAddress, uint8 _subAccountId, bool _mapping) external;
 }