Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- L2WethGateway
- Optimization enabled
- true
- Compiler version
- v0.6.11+commit.5ef660b1
- Optimization runs
- 100
- Verified at
- 2023-08-24T12:54:51.254000Z
contracts/tokenbridge/arbitrum/gateway/L2WethGateway.sol
// SPDX-License-Identifier: Apache-2.0
/*
* Copyright 2020, Offchain Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
pragma solidity ^0.6.11;
import "./L2ArbitrumGateway.sol";
import "../../libraries/IWETH9.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
contract L2WethGateway is L2ArbitrumGateway {
using SafeERC20 for IERC20;
address public l1Weth;
address public l2Weth;
function initialize(
address _l1Counterpart,
address _router,
address _l1Weth,
address _l2Weth
) public {
L2ArbitrumGateway._initialize(_l1Counterpart, _router);
require(_l1Weth != address(0), "INVALID_L1WETH");
require(_l2Weth != address(0), "INVALID_L2WETH");
l1Weth = _l1Weth;
l2Weth = _l2Weth;
}
/**
* @notice internal utility function used to handle when no contract is deployed at expected address
* @param l1ERC20 L1 address of ERC20
*/
function handleNoContract(
address l1ERC20,
address, /* expectedL2Address */
address _from,
address, /* _to */
uint256 _amount,
bytes memory /* deployData */
) internal override returns (bool shouldHalt) {
// it is assumed that the custom token is deployed in the L2 before deposits are made
// trigger withdrawal
// this codepath should only be hit if the system is setup incorrectly
// this withdrawal is for error recovery, not composing with L2 dapps, so we ignore the return value
triggerWithdrawal(l1ERC20, address(this), _from, _amount, "");
return true;
}
/**
* @notice Calculate the address used when bridging an ERC20 token
* @dev the L1 and L2 address oracles may not always be in sync.
* For example, a custom token may have been registered but not deploy or the contract self destructed.
* @param l1ERC20 address of L1 token
* @return L2 address of a bridged ERC20 token
*/
function calculateL2TokenAddress(address l1ERC20) public view override returns (address) {
if (l1ERC20 != l1Weth) {
// invalid L1 weth address
return address(0);
}
return l2Weth;
}
function inboundEscrowTransfer(
address _l2TokenAddress,
address _dest,
uint256 _amount
) internal override {
IWETH9(_l2TokenAddress).deposit{ value: _amount }();
IERC20(_l2TokenAddress).safeTransfer(_dest, _amount);
}
function createOutboundTx(
address _from,
uint256 _tokenAmount,
bytes memory _outboundCalldata
) internal override returns (uint256) {
// exitNum incremented after being included in _outboundCalldata
exitNum++;
return
sendTxToL1(
// we send the amount of weth withdrawn as callvalue to the L1 gateway
_tokenAmount,
_from,
counterpartGateway,
_outboundCalldata
);
}
receive() external payable {}
}
contracts/tokenbridge/libraries/gateway/TokenGateway.sol
// SPDX-License-Identifier: Apache-2.0
/*
* Copyright 2020, Offchain Labs, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
pragma solidity ^0.6.11;
import "./ITokenGateway.sol";
import "@openzeppelin/contracts/utils/Address.sol";
abstract contract TokenGateway is ITokenGateway {
using Address for address;
address public counterpartGateway;
address public router;
// This modifier is overriden in gateways to validate the message sender
// For L1 to L2 messages need to be validated against the aliased counterpartGateway
// For L2 to L1 messages need to be validated against the bridge and L2ToL1Sender
// prettier-ignore
modifier onlyCounterpartGateway() virtual;
function _initialize(address _counterpartGateway, address _router) internal virtual {
// This initializes internal variables of the abstract contract it can be chained together with other functions.
// It is virtual so subclasses can override or wrap around this logic.
// An example where this is useful is different subclasses that validate the router address differently
require(_counterpartGateway != address(0), "INVALID_COUNTERPART");
require(counterpartGateway == address(0), "ALREADY_INIT");
counterpartGateway = _counterpartGateway;
router = _router;
}
function isRouter(address _target) internal view returns (bool isTargetRouter) {
return _target == router;
}
/**
* @notice Calculate the address used when bridging an ERC20 token
* @dev the L1 and L2 address oracles may not always be in sync.
* For example, a custom token may have been registered but not deploy or the contract self destructed.
* @param l1ERC20 address of L1 token
* @return L2 address of a bridged ERC20 token
*/
function calculateL2TokenAddress(address l1ERC20)
public
view
virtual
override
returns (address);
}
Contract ABI
[{"type":"event","name":"DepositFinalized","inputs":[{"type":"address","name":"l1Token","internalType":"address","indexed":true},{"type":"address","name":"_from","internalType":"address","indexed":true},{"type":"address","name":"_to","internalType":"address","indexed":true},{"type":"uint256","name":"_amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"TxToL1","inputs":[{"type":"address","name":"_from","internalType":"address","indexed":true},{"type":"address","name":"_to","internalType":"address","indexed":true},{"type":"uint256","name":"_id","internalType":"uint256","indexed":true},{"type":"bytes","name":"_data","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"event","name":"WithdrawalInitiated","inputs":[{"type":"address","name":"l1Token","internalType":"address","indexed":false},{"type":"address","name":"_from","internalType":"address","indexed":true},{"type":"address","name":"_to","internalType":"address","indexed":true},{"type":"uint256","name":"_l2ToL1Id","internalType":"uint256","indexed":true},{"type":"uint256","name":"_exitNum","internalType":"uint256","indexed":false},{"type":"uint256","name":"_amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"calculateL2TokenAddress","inputs":[{"type":"address","name":"l1ERC20","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"counterpartGateway","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"exitNum","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[],"name":"finalizeInboundTransfer","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address","name":"_from","internalType":"address"},{"type":"address","name":"_to","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"bytes","name":"_data","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bytes","name":"outboundCalldata","internalType":"bytes"}],"name":"getOutboundCalldata","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address","name":"_from","internalType":"address"},{"type":"address","name":"_to","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"bytes","name":"_data","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[{"type":"address","name":"_l1Counterpart","internalType":"address"},{"type":"address","name":"_router","internalType":"address"},{"type":"address","name":"_l1Weth","internalType":"address"},{"type":"address","name":"_l2Weth","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"l1Weth","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"l2Weth","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bytes","name":"","internalType":"bytes"}],"name":"outboundTransfer","inputs":[{"type":"address","name":"_l1Token","internalType":"address"},{"type":"address","name":"_to","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"bytes","name":"_data","internalType":"bytes"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bytes","name":"res","internalType":"bytes"}],"name":"outboundTransfer","inputs":[{"type":"address","name":"_l1Token","internalType":"address"},{"type":"address","name":"_to","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"uint256","name":"","internalType":"uint256"},{"type":"bytes","name":"_data","internalType":"bytes"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"postUpgradeInit","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"router","inputs":[]},{"type":"receive","stateMutability":"payable"}]
Contract Creation Code
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