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feat: Write a zetatokenconsumer for zevm (#146)
Co-authored-by: Denis Fadeev <denis@fadeev.org>
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| // SPDX-License-Identifier: MIT | ||
| pragma solidity 0.8.7; | ||
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| import "@openzeppelin/contracts/interfaces/IERC20.sol"; | ||
| import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; | ||
| import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol"; | ||
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| import "../interfaces/ZetaInterfaces.sol"; | ||
| import "../../zevm/interfaces/IWZETA.sol"; | ||
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| interface ZetaTokenConsumerZEVMErrors { | ||
| error InputCantBeZero(); | ||
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| error ErrorSendingETH(); | ||
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| error ReentrancyError(); | ||
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| error NotEnoughValue(); | ||
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| error InputCantBeZeta(); | ||
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| error OutputCantBeZeta(); | ||
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| error OnlyWZETAAllowed(); | ||
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| error InvalidForZEVM(); | ||
| } | ||
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| /** | ||
| * @dev ZetaTokenConsumer for ZEVM | ||
| */ | ||
| contract ZetaTokenConsumerZEVM is ZetaTokenConsumer, ZetaTokenConsumerZEVMErrors { | ||
| using SafeERC20 for IERC20; | ||
| uint256 internal constant MAX_DEADLINE = 200; | ||
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| address public immutable WETH9Address; | ||
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| IUniswapV2Router02 internal immutable uniswapV2Router; | ||
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| constructor(address WETH9Address_, address uniswapV2Router_) { | ||
| if (WETH9Address_ == address(0) || uniswapV2Router_ == address(0)) revert ZetaCommonErrors.InvalidAddress(); | ||
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| WETH9Address = WETH9Address_; | ||
| uniswapV2Router = IUniswapV2Router02(uniswapV2Router_); | ||
| } | ||
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| function getZetaFromEth( | ||
| address destinationAddress, | ||
| uint256 minAmountOut | ||
| ) external payable override returns (uint256) { | ||
| if (destinationAddress == address(0)) revert ZetaCommonErrors.InvalidAddress(); | ||
| if (msg.value == 0) revert InputCantBeZero(); | ||
| if (msg.value < minAmountOut) revert NotEnoughValue(); | ||
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| IWETH9(WETH9Address).deposit{value: msg.value}(); | ||
| IERC20(WETH9Address).safeTransfer(destinationAddress, msg.value); | ||
| emit EthExchangedForZeta(msg.value, msg.value); | ||
| return msg.value; | ||
| } | ||
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| function getZetaFromToken( | ||
| address destinationAddress, | ||
| uint256 minAmountOut, | ||
| address inputToken, | ||
| uint256 inputTokenAmount | ||
| ) external override returns (uint256) { | ||
| if (destinationAddress == address(0) || inputToken == address(0)) revert ZetaCommonErrors.InvalidAddress(); | ||
| if (inputTokenAmount == 0) revert InputCantBeZero(); | ||
| if (inputToken == WETH9Address) revert InputCantBeZeta(); | ||
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| IERC20(inputToken).safeTransferFrom(msg.sender, address(this), inputTokenAmount); | ||
| IERC20(inputToken).safeApprove(address(uniswapV2Router), inputTokenAmount); | ||
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| address[] memory path = new address[](2); | ||
| path[0] = inputToken; | ||
| path[1] = WETH9Address; | ||
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| uint256[] memory amounts = uniswapV2Router.swapExactTokensForTokens( | ||
| inputTokenAmount, | ||
| minAmountOut, | ||
| path, | ||
| destinationAddress, | ||
| block.timestamp + MAX_DEADLINE | ||
| ); | ||
| uint256 amountOut = amounts[path.length - 1]; | ||
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| emit TokenExchangedForZeta(inputToken, inputTokenAmount, amountOut); | ||
| return amountOut; | ||
| } | ||
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| function getEthFromZeta( | ||
| address destinationAddress, | ||
| uint256 minAmountOut, | ||
| uint256 zetaTokenAmount | ||
| ) external override returns (uint256) { | ||
| if (destinationAddress == address(0)) revert ZetaCommonErrors.InvalidAddress(); | ||
| if (zetaTokenAmount == 0) revert InputCantBeZero(); | ||
| if (zetaTokenAmount < minAmountOut) revert NotEnoughValue(); | ||
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| IERC20(WETH9Address).safeTransferFrom(msg.sender, address(this), zetaTokenAmount); | ||
| IWETH9(WETH9Address).withdraw(zetaTokenAmount); | ||
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| emit ZetaExchangedForEth(zetaTokenAmount, zetaTokenAmount); | ||
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| (bool sent, ) = destinationAddress.call{value: zetaTokenAmount}(""); | ||
| if (!sent) revert ErrorSendingETH(); | ||
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| return zetaTokenAmount; | ||
| } | ||
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| function getTokenFromZeta( | ||
| address destinationAddress, | ||
| uint256 minAmountOut, | ||
| address outputToken, | ||
| uint256 zetaTokenAmount | ||
| ) external override returns (uint256) { | ||
| if (destinationAddress == address(0) || outputToken == address(0)) revert ZetaCommonErrors.InvalidAddress(); | ||
| if (zetaTokenAmount == 0) revert InputCantBeZero(); | ||
| if (outputToken == WETH9Address) revert OutputCantBeZeta(); | ||
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| IERC20(WETH9Address).safeTransferFrom(msg.sender, address(this), zetaTokenAmount); | ||
| IERC20(WETH9Address).safeApprove(address(uniswapV2Router), zetaTokenAmount); | ||
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| address[] memory path = new address[](2); | ||
| path[0] = WETH9Address; | ||
| path[1] = outputToken; | ||
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| uint256[] memory amounts = uniswapV2Router.swapExactTokensForTokens( | ||
| zetaTokenAmount, | ||
| minAmountOut, | ||
| path, | ||
| destinationAddress, | ||
| block.timestamp + MAX_DEADLINE | ||
| ); | ||
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| uint256 amountOut = amounts[path.length - 1]; | ||
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| emit ZetaExchangedForToken(outputToken, zetaTokenAmount, amountOut); | ||
| return amountOut; | ||
| } | ||
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| function hasZetaLiquidity() external view override returns (bool) { | ||
| revert InvalidForZEVM(); | ||
| } | ||
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| receive() external payable { | ||
| if (msg.sender != WETH9Address) revert OnlyWZETAAllowed(); | ||
| } | ||
| } |
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912 changes: 912 additions & 0 deletions
912
pkg/contracts/evm/tools/zetatokenconsumerzevm.strategy.sol/zetatokenconsumerzevm.go
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