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feat: Add forwarder with permit (#1)
* build: compile * chore: cleanup * build: add sponsored one * fix: approve
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| Original file line number | Diff line number | Diff line change |
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| // SPDX-License-Identifier: MIT | ||
| pragma solidity ^0.8.9; | ||
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| import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol"; | ||
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| import {GelatoRelayContextERC2771} from "../../lib/relay-context-contracts/contracts/GelatoRelayContextERC2771.sol"; | ||
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| import {ISocketVault} from "../interfaces/ISocketVault.sol"; | ||
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| import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; | ||
| import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol"; | ||
| import {ILightAccountFactory} from "../interfaces/ILightAccountFactory.sol"; | ||
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| /** | ||
| * @title LyraPermitSelfPayingForwarder | ||
| * @notice Use this contract to allow gasless transactions, users pay gelato relayers in tokens like (USDC.e) | ||
| * | ||
| * @dev All functions are guarded with onlyGelatoRelayERC2771. They should only be called by GELATO_RELAY_ERC2771 or GELATO_RELAY_CONCURRENT_ERC2771 | ||
| * @dev Someone need to fund this contract with ETH to use Socket Bridge | ||
| */ | ||
| contract LyraPermitSelfPayingForwarder is Ownable, GelatoRelayContextERC2771 { | ||
| ///@dev SocketVault address. | ||
| address public immutable socketVault; | ||
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| ///@dev local token address. This token must support permit | ||
| address public immutable token; | ||
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| ///@dev Light Account factory address. | ||
| /// See this script for more info https://github.com/alchemyplatform/light-account/blob/main/script/Deploy_LightAccountFactory.s.sol | ||
| address public constant lightAccountFactory = 0x000000893A26168158fbeaDD9335Be5bC96592E2; | ||
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| struct PermitData { | ||
| uint256 value; | ||
| uint256 deadline; | ||
| uint8 v; | ||
| bytes32 r; | ||
| bytes32 s; | ||
| } | ||
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| constructor(address _token, address _socketVault) payable GelatoRelayContextERC2771() { | ||
| token = _token; | ||
| socketVault = _socketVault; | ||
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| IERC20(_token).approve(_socketVault, type(uint256).max); | ||
| } | ||
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| /** | ||
| * @notice Deposit USDC to L2 through socket bridge. Gas is paid in token | ||
| * @dev Users never have to approve USDC to this contract. | ||
| * @param maxFeeToken Maximum fee in that user is willing to pay | ||
| * @param isScwWallet True if user wants to deposit to default LightAccount on L2. False if the user wants to deposit to its own L2 address | ||
| * @param minGasLimit Minimum gas limit for the L2 execution | ||
| * @param connector Socket Connector | ||
| * @param permitData Data and signatures for permit | ||
| */ | ||
| function depositGasless( | ||
| uint256 maxFeeToken, | ||
| bool isScwWallet, | ||
| uint32 minGasLimit, | ||
| address connector, | ||
| PermitData calldata permitData | ||
| ) external payable onlyGelatoRelayERC2771 { | ||
| address msgSender = _getMsgSender(); | ||
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| // use try catch so that others cannot grief by submitting the same permit data before this tx | ||
| try IERC20Permit(token).permit( | ||
| msgSender, address(this), permitData.value, permitData.deadline, permitData.v, permitData.r, permitData.s | ||
| ) {} catch {} | ||
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| IERC20(token).transferFrom(msgSender, address(this), permitData.value); | ||
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| // Pay gelato fee, reverts if exceeded max fee | ||
| _transferRelayFeeCapped(maxFeeToken); | ||
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| uint256 remaining = permitData.value - _getFee(); | ||
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| uint256 socketFee = ISocketVault(socketVault).getMinFees(connector, minGasLimit); | ||
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| // Pay socket fee and deposit to Lyra Chain | ||
| ISocketVault(socketVault).depositToAppChain{value: socketFee}( | ||
| _getL2Receiver(msgSender, isScwWallet), remaining, minGasLimit, connector | ||
| ); | ||
| } | ||
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| /** | ||
| * @notice Return the receiver address on L2 | ||
| */ | ||
| function _getL2Receiver(address msgSender, bool isScwWallet) internal view returns (address) { | ||
| if (isScwWallet) { | ||
| return ILightAccountFactory(lightAccountFactory).getAddress(msgSender, 0); | ||
| } else { | ||
| return msgSender; | ||
| } | ||
| } | ||
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| /** | ||
| * @dev Owner can withdraw ETH deposited to cover socket protocol fee | ||
| */ | ||
| function withdrawETH() external onlyOwner { | ||
| payable(msg.sender).transfer(address(this).balance); | ||
| } | ||
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| receive() external payable {} | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| // SPDX-License-Identifier: MIT | ||
| pragma solidity ^0.8.9; | ||
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| import {Ownable, Context} from "@openzeppelin/contracts/access/Ownable.sol"; | ||
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| import {ERC2771Context} from "../../lib/relay-context-contracts/contracts/vendor/ERC2771Context.sol"; | ||
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| import {ISocketVault} from "../interfaces/ISocketVault.sol"; | ||
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| import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; | ||
| import {IERC20Permit} from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol"; | ||
| import {ILightAccountFactory} from "../interfaces/ILightAccountFactory.sol"; | ||
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| /** | ||
| * @title LyraPermitSponsoredForwarder | ||
| * @notice Use this contract to allow gasless transactions, we sponsor the gas for users | ||
| * | ||
| */ | ||
| contract LyraPermitSponsoredForwarder is Ownable, ERC2771Context { | ||
| ///@dev SocketVault address. | ||
| address public immutable socketVault; | ||
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| ///@dev local token address. This token must support permit | ||
| address public immutable token; | ||
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| ///@dev Light Account factory address. | ||
| address public constant lightAccountFactory = 0x000000893A26168158fbeaDD9335Be5bC96592E2; | ||
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| struct PermitData { | ||
| uint256 value; | ||
| uint256 deadline; | ||
| uint8 v; | ||
| bytes32 r; | ||
| bytes32 s; | ||
| } | ||
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| constructor(address _token, address _socketVault) | ||
| payable | ||
| ERC2771Context(0xd8253782c45a12053594b9deB72d8e8aB2Fca54c) | ||
| { | ||
| token = _token; | ||
| socketVault = _socketVault; | ||
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| IERC20(_token).approve(_socketVault, type(uint256).max); | ||
| } | ||
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| /** | ||
| * @notice Deposit USDC to L2 through socket bridge. Gas is paid in token | ||
| * @dev Users never have to approve USDC to this contract. | ||
| * @param isScwWallet True if user wants to deposit to default LightAccount on L2. False if the user wants to deposit to its own L2 address | ||
| * @param minGasLimit Minimum gas limit for the L2 execution | ||
| * @param connector Socket Connector | ||
| * @param permitData Data and signatures for permit | ||
| */ | ||
| function depositGasless(bool isScwWallet, uint32 minGasLimit, address connector, PermitData calldata permitData) | ||
| external | ||
| payable | ||
| { | ||
| address msgSender = _msgSender(); | ||
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| // use try catch so that others cannot grief by submitting the same permit data before this tx | ||
| try IERC20Permit(token).permit( | ||
| msgSender, address(this), permitData.value, permitData.deadline, permitData.v, permitData.r, permitData.s | ||
| ) {} catch {} | ||
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| IERC20(token).transferFrom(msgSender, address(this), permitData.value); | ||
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| uint256 socketFee = ISocketVault(socketVault).getMinFees(connector, minGasLimit); | ||
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| // Pay socket fee and deposit to Lyra Chain | ||
| ISocketVault(socketVault).depositToAppChain{value: socketFee}( | ||
| _getL2Receiver(msgSender, isScwWallet), permitData.value, minGasLimit, connector | ||
| ); | ||
| } | ||
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| /** | ||
| * @notice Return the receiver address on L2 | ||
| */ | ||
| function _getL2Receiver(address msgSender, bool isScwWallet) internal view returns (address) { | ||
| if (isScwWallet) { | ||
| return ILightAccountFactory(lightAccountFactory).getAddress(msgSender, 0); | ||
| } else { | ||
| return msgSender; | ||
| } | ||
| } | ||
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| /** | ||
| * @dev Owner can withdraw ETH deposited to cover socket protocol fee | ||
| */ | ||
| function withdrawETH() external onlyOwner { | ||
| payable(msg.sender).transfer(address(this).balance); | ||
| } | ||
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| function _msgSender() internal view override(Context, ERC2771Context) returns (address sender) { | ||
| return ERC2771Context._msgSender(); | ||
| } | ||
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| function _msgData() internal view override(Context, ERC2771Context) returns (bytes calldata) { | ||
| return ERC2771Context._msgData(); | ||
| } | ||
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| receive() external payable {} | ||
| } |
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