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* Develop cross chain swap * add deploy script * improve swap * deploy to athens2 * remove unsed code * renames * update readme
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| const path = require("path"); | ||
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| const OFF = 0; | ||
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| module.exports = { | ||
| env: { | ||
| browser: false, | ||
| es2021: true, | ||
| mocha: true, | ||
| node: true, | ||
| }, | ||
| extends: ["../../.eslintrc.js"], | ||
| rules: { | ||
| "no-console": OFF, | ||
| }, | ||
| settings: { | ||
| "import/resolver": { | ||
| typescript: { | ||
| project: path.join(__dirname, "tsconfig.json"), | ||
| }, | ||
| }, | ||
| }, | ||
| }; |
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| # ZetaEVM contracts | ||
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| > ⚠️ The contracts **are not audited yet**, use at your own risk. | ||
| ## Environment variables | ||
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| Follow the template in `.env.example`. | ||
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| * The private key should **not** include `0x`. | ||
| * To verify your contracts, you'll need api keys both in BSCScan and Etherscan. | ||
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| ## Running Tests | ||
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| ```bash | ||
| yarn test | ||
| ``` |
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| // SPDX-License-Identifier: MIT | ||
| pragma solidity 0.8.7; | ||
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| interface IZRC4 { | ||
| function totalSupply() external view returns (uint256); | ||
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| function balanceOf(address account) external view returns (uint256); | ||
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| function transfer(address recipient, uint256 amount) external returns (bool); | ||
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| function allowance(address owner, address spender) external view returns (uint256); | ||
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| function approve(address spender, uint256 amount) external returns (bool); | ||
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| function transferFrom( | ||
| address sender, | ||
| address recipient, | ||
| uint256 amount | ||
| ) external returns (bool); | ||
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| function deposit(address to, uint256 amount) external returns (bool); | ||
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| function withdraw(bytes memory to, uint256 amount) external returns (bool); | ||
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| function withdrawGasFee() external view returns (address, uint256); | ||
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| event Transfer(address indexed from, address indexed to, uint256 value); | ||
| event Approval(address indexed owner, address indexed spender, uint256 value); | ||
| event Deposit(bytes from, address indexed to, uint256 value); | ||
| event Withdrawal(address indexed from, bytes to, uint256 value); | ||
| } |
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packages/zevm-contracts/contracts/interfaces/zContract.sol
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| // SPDX-License-Identifier: MIT | ||
| pragma solidity 0.8.7; | ||
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| interface zContract { | ||
| function onCrossChainCall( | ||
| address zrc4, | ||
| uint256 amount, | ||
| bytes calldata message | ||
| ) external; | ||
| } |
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packages/zevm-contracts/contracts/system/SystemContract.sol
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| // SPDX-License-Identifier: MIT | ||
| pragma solidity 0.8.7; | ||
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| import "../interfaces/zContract.sol"; | ||
| import "../interfaces/IZRC4.sol"; | ||
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| interface SystemContractErrors { | ||
| error CallerIsNotFungibleModule(); | ||
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| error InvalidTarget(); | ||
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| error CantBeIdenticalAddresses(); | ||
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| error CantBeZeroAddress(); | ||
| } | ||
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| contract SystemContract is SystemContractErrors { | ||
| mapping(uint256 => uint256) public gasPriceByChainId; | ||
| mapping(uint256 => address) public gasCoinZRC4ByChainId; | ||
| mapping(uint256 => address) public gasZetaPoolByChainId; | ||
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| address public constant FUNGIBLE_MODULE_ADDRESS = 0x735b14BB79463307AAcBED86DAf3322B1e6226aB; | ||
| address public wZetaContractAddress; | ||
| address public uniswapv2FactoryAddress; | ||
| address public uniswapv2Router02Address; | ||
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| event SystemContractDeployed(); | ||
| event SetGasPrice(uint256, uint256); | ||
| event SetGasCoin(uint256, address); | ||
| event SetGasZetaPool(uint256, address); | ||
| event SetWZeta(address); | ||
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| constructor( | ||
| address wzeta_, | ||
| address uniswapv2Factory_, | ||
| address uniswapv2Router02_ | ||
| ) { | ||
| if (msg.sender != FUNGIBLE_MODULE_ADDRESS) revert CallerIsNotFungibleModule(); | ||
| wZetaContractAddress = wzeta_; | ||
| uniswapv2FactoryAddress = uniswapv2Factory_; | ||
| uniswapv2Router02Address = uniswapv2Router02_; | ||
| emit SystemContractDeployed(); | ||
| } | ||
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| // deposit foreign coins into ZRC4 and call user specified contract on zEVM | ||
| function depositAndCall( | ||
| address zrc4, | ||
| uint256 amount, | ||
| address target, | ||
| bytes calldata message | ||
| ) external { | ||
| if (msg.sender != FUNGIBLE_MODULE_ADDRESS) revert CallerIsNotFungibleModule(); | ||
| if (target == FUNGIBLE_MODULE_ADDRESS || target == address(this)) revert InvalidTarget(); | ||
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| IZRC4(zrc4).deposit(target, amount); | ||
| zContract(target).onCrossChainCall(zrc4, amount, message); | ||
| } | ||
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| // returns sorted token addresses, used to handle return values from pairs sorted in this order | ||
| function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) { | ||
| if (tokenA == tokenB) revert CantBeIdenticalAddresses(); | ||
| (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA); | ||
| if (token0 == address(0)) revert CantBeZeroAddress(); | ||
| } | ||
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| // calculates the CREATE2 address for a pair without making any external calls | ||
| function uniswapv2PairFor( | ||
| address factory, | ||
| address tokenA, | ||
| address tokenB | ||
| ) public pure returns (address pair) { | ||
| (address token0, address token1) = sortTokens(tokenA, tokenB); | ||
| pair = address( | ||
| uint160( | ||
| uint256( | ||
| keccak256( | ||
| abi.encodePacked( | ||
| hex"ff", | ||
| factory, | ||
| keccak256(abi.encodePacked(token0, token1)), | ||
| hex"96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f" // init code hash | ||
| ) | ||
| ) | ||
| ) | ||
| ) | ||
| ); | ||
| } | ||
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| // fungible module updates the gas price oracle periodically | ||
| function setGasPrice(uint256 chainID, uint256 price) external { | ||
| if (msg.sender != FUNGIBLE_MODULE_ADDRESS) revert CallerIsNotFungibleModule(); | ||
| gasPriceByChainId[chainID] = price; | ||
| emit SetGasPrice(chainID, price); | ||
| } | ||
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| function setGasCoinZRC4(uint256 chainID, address zrc4) external { | ||
| if (msg.sender != FUNGIBLE_MODULE_ADDRESS) revert CallerIsNotFungibleModule(); | ||
| gasCoinZRC4ByChainId[chainID] = zrc4; | ||
| emit SetGasCoin(chainID, zrc4); | ||
| } | ||
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| // set the pool wzeta/erc20 address | ||
| function setGasZetaPool(uint256 chainID, address erc20) external { | ||
| if (msg.sender != FUNGIBLE_MODULE_ADDRESS) revert CallerIsNotFungibleModule(); | ||
| address pool = uniswapv2PairFor(uniswapv2FactoryAddress, wZetaContractAddress, erc20); | ||
| gasZetaPoolByChainId[chainID] = pool; | ||
| emit SetGasZetaPool(chainID, pool); | ||
| } | ||
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| function setWZETAContractAddress(address addr) external { | ||
| if (msg.sender != FUNGIBLE_MODULE_ADDRESS) revert CallerIsNotFungibleModule(); | ||
| wZetaContractAddress = addr; | ||
| emit SetWZeta(wZetaContractAddress); | ||
| } | ||
| } |
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