proxmox/docs/bridge/contracts/CCIPWETH9Bridge_standard_json_generated.json

{
  "language": "Solidity",
  "sources": {
    "CCIPWETH9Bridge.sol": {
      "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.19;\n\n// contracts/ccip/IRouterClient.sol\n\n/**\n * @title Chainlink CCIP Router Client Interface\n * @notice Interface for Chainlink CCIP Router Client\n * @dev This interface is based on Chainlink CCIP Router Client specification\n */\ninterface IRouterClient {\n    /// @notice Represents the router's fee token\n    enum TokenAmountType {\n        Fiat,\n        Native\n    }\n\n    /// @notice Represents a token amount and its type\n    struct TokenAmount {\n        address token;\n        uint256 amount;\n        TokenAmountType amountType;\n    }\n\n    /// @notice Represents a CCIP message\n    struct EVM2AnyMessage {\n        bytes receiver;\n        bytes data;\n        TokenAmount[] tokenAmounts;\n        address feeToken;\n        bytes extraArgs;\n    }\n\n    /// @notice Represents a CCIP message with source chain information\n    struct Any2EVMMessage {\n        bytes32 messageId;\n        uint64 sourceChainSelector;\n        bytes sender;\n        bytes data;\n        TokenAmount[] tokenAmounts;\n    }\n\n    /// @notice Emitted when a message is sent\n    event MessageSent(\n        bytes32 indexed messageId,\n        uint64 indexed destinationChainSelector,\n        address indexed sender,\n        bytes receiver,\n        bytes data,\n        TokenAmount[] tokenAmounts,\n        address feeToken,\n        bytes extraArgs\n    );\n\n    /// @notice Emitted when a message is received\n    event MessageReceived(\n        bytes32 indexed messageId,\n        uint64 indexed sourceChainSelector,\n        address indexed sender,\n        bytes data,\n        TokenAmount[] tokenAmounts\n    );\n\n    /// @notice Sends a message to a destination chain\n    /// @param destinationChainSelector The chain selector of the destination chain\n    /// @param message The message to send\n    /// @return messageId The ID of the sent message\n    /// @return fees The fees required for the message\n    /// @dev If feeToken is zero address, fees are paid in native token (ETH) via msg.value\n    function ccipSend(\n        uint64 destinationChainSelector,\n        EVM2AnyMessage memory message\n    ) external payable returns (bytes32 messageId, uint256 fees);\n\n    /// @notice Gets the fee for sending a message\n    /// @param destinationChainSelector The chain selector of the destination chain\n    /// @param message The message to send\n    /// @return fee The fee required for the message\n    function getFee(\n        uint64 destinationChainSelector,\n        EVM2AnyMessage memory message\n    ) external view returns (uint256 fee);\n\n    /// @notice Gets the supported tokens for a destination chain\n    /// @param destinationChainSelector The chain selector of the destination chain\n    /// @return tokens The list of supported tokens\n    function getSupportedTokens(\n        uint64 destinationChainSelector\n    ) external view returns (address[] memory tokens);\n}\n\n// contracts/ccip/CCIPWETH9Bridge.sol\n\n// Minimal IERC20 interface for ERC20 tokens (WETH9 and LINK)\ninterface IERC20 {\n    function transferFrom(address from, address to, uint256 amount) external returns (bool);\n    function transfer(address to, uint256 amount) external returns (bool);\n    function approve(address spender, uint256 amount) external returns (bool);\n    function balanceOf(address account) external view returns (uint256);\n}\n\n/**\n * @title CCIP WETH9 Bridge\n * @notice Cross-chain WETH9 transfer bridge using Chainlink CCIP\n * @dev Enables users to send WETH9 tokens across chains via CCIP\n */\ncontract CCIPWETH9Bridge {\n    \n    IRouterClient public immutable ccipRouter;\n    address public immutable weth9; // WETH9 contract address\n    address public feeToken; // LINK token address\n    address public admin;\n    \n    // Destination chain configurations\n    struct DestinationChain {\n        uint64 chainSelector;\n        address receiverBridge; // Address of corresponding bridge on destination chain\n        bool enabled;\n    }\n    \n    mapping(uint64 => DestinationChain) public destinations;\n    uint64[] public destinationChains;\n    \n    // Track cross-chain transfers for replay protection\n    mapping(bytes32 => bool) public processedTransfers;\n    mapping(address => uint256) public nonces;\n    \n    event CrossChainTransferInitiated(\n        bytes32 indexed messageId,\n        address indexed sender,\n        uint64 indexed destinationChainSelector,\n        address recipient,\n        uint256 amount,\n        uint256 nonce\n    );\n    \n    event CrossChainTransferCompleted(\n        bytes32 indexed messageId,\n        uint64 indexed sourceChainSelector,\n        address indexed recipient,\n        uint256 amount\n    );\n    \n    event DestinationAdded(uint64 chainSelector, address receiverBridge);\n    event DestinationRemoved(uint64 chainSelector);\n    event DestinationUpdated(uint64 chainSelector, address receiverBridge);\n    \n    modifier onlyAdmin() {\n        require(msg.sender == admin, \"CCIPWETH9Bridge: only admin\");\n        _;\n    }\n    \n    modifier onlyRouter() {\n        require(msg.sender == address(ccipRouter), \"CCIPWETH9Bridge: only router\");\n        _;\n    }\n    \n    constructor(address _ccipRouter, address _weth9, address _feeToken) {\n        require(_ccipRouter != address(0), \"CCIPWETH9Bridge: zero router\");\n        require(_weth9 != address(0), \"CCIPWETH9Bridge: zero WETH9\");\n        require(_feeToken != address(0), \"CCIPWETH9Bridge: zero fee token\");\n        \n        ccipRouter = IRouterClient(_ccipRouter);\n        weth9 = _weth9;\n        feeToken = _feeToken;\n        admin = msg.sender;\n    }\n    \n    /**\n     * @notice Send WETH9 tokens to another chain via CCIP\n     * @param destinationChainSelector The chain selector of the destination chain\n     * @param recipient The recipient address on the destination chain\n     * @param amount The amount of WETH9 to send\n     * @return messageId The CCIP message ID\n     */\n    function sendCrossChain(\n        uint64 destinationChainSelector,\n        address recipient,\n        uint256 amount\n    ) external returns (bytes32 messageId) {\n        require(amount > 0, \"CCIPWETH9Bridge: invalid amount\");\n        require(recipient != address(0), \"CCIPWETH9Bridge: zero recipient\");\n        \n        DestinationChain memory dest = destinations[destinationChainSelector];\n        require(dest.enabled, \"CCIPWETH9Bridge: destination not enabled\");\n        \n        // Transfer WETH9 from user\n        require(IERC20(weth9).transferFrom(msg.sender, address(this), amount), \"CCIPWETH9Bridge: transfer failed\");\n        \n        // Increment nonce for replay protection\n        nonces[msg.sender]++;\n        uint256 currentNonce = nonces[msg.sender];\n        \n        // Encode transfer data (recipient, amount, sender, nonce)\n        bytes memory data = abi.encode(\n            recipient,\n            amount,\n            msg.sender,\n            currentNonce\n        );\n        \n        // Prepare CCIP message with WETH9 tokens\n        IRouterClient.EVM2AnyMessage memory message = IRouterClient.EVM2AnyMessage({\n            receiver: abi.encode(dest.receiverBridge),\n            data: data,\n            tokenAmounts: new IRouterClient.TokenAmount[](1),\n            feeToken: feeToken,\n            extraArgs: \"\"\n        });\n        \n        // Set token amount (WETH9)\n        message.tokenAmounts[0] = IRouterClient.TokenAmount({\n            token: weth9,\n            amount: amount,\n            amountType: IRouterClient.TokenAmountType.Fiat\n        });\n        \n        // Calculate fee\n        uint256 fee = ccipRouter.getFee(destinationChainSelector, message);\n        \n        // Approve and pay fee\n        if (fee > 0) {\n            require(IERC20(feeToken).transferFrom(msg.sender, address(this), fee), \"CCIPWETH9Bridge: fee transfer failed\");\n            require(IERC20(feeToken).approve(address(ccipRouter), fee), \"CCIPWETH9Bridge: fee approval failed\");\n        }\n        \n        // Send via CCIP\n        (messageId, ) = ccipRouter.ccipSend(destinationChainSelector, message);\n        \n        emit CrossChainTransferInitiated(\n            messageId,\n            msg.sender,\n            destinationChainSelector,\n            recipient,\n            amount,\n            currentNonce\n        );\n        \n        return messageId;\n    }\n    \n    /**\n     * @notice Receive WETH9 tokens from another chain via CCIP\n     * @param message The CCIP message\n     */\n    function ccipReceive(\n        IRouterClient.Any2EVMMessage calldata message\n    ) external onlyRouter {\n        // Replay protection: check if message already processed\n        require(!processedTransfers[message.messageId], \"CCIPWETH9Bridge: transfer already processed\");\n        \n        // Mark as processed\n        processedTransfers[message.messageId] = true;\n        \n        // Validate token amounts\n        require(message.tokenAmounts.length > 0, \"CCIPWETH9Bridge: no tokens\");\n        require(message.tokenAmounts[0].token == weth9, \"CCIPWETH9Bridge: invalid token\");\n        \n        uint256 amount = message.tokenAmounts[0].amount;\n        require(amount > 0, \"CCIPWETH9Bridge: invalid amount\");\n        \n        // Decode transfer data (recipient, amount, sender, nonce)\n        (address recipient, , , ) = abi.decode(\n            message.data,\n            (address, uint256, address, uint256)\n        );\n        \n        require(recipient != address(0), \"CCIPWETH9Bridge: zero recipient\");\n        \n        // Transfer WETH9 to recipient\n        require(IERC20(weth9).transfer(recipient, amount), \"CCIPWETH9Bridge: transfer failed\");\n        \n        emit CrossChainTransferCompleted(\n            message.messageId,\n            message.sourceChainSelector,\n            recipient,\n            amount\n        );\n    }\n    \n    /**\n     * @notice Calculate fee for cross-chain transfer\n     * @param destinationChainSelector The chain selector of the destination chain\n     * @param amount The amount of WETH9 to send\n     * @return fee The fee required for the transfer\n     */\n    function calculateFee(\n        uint64 destinationChainSelector,\n        uint256 amount\n    ) external view returns (uint256 fee) {\n        DestinationChain memory dest = destinations[destinationChainSelector];\n        require(dest.enabled, \"CCIPWETH9Bridge: destination not enabled\");\n        \n        bytes memory data = abi.encode(address(0), amount, address(0), 0);\n        \n        IRouterClient.EVM2AnyMessage memory message = IRouterClient.EVM2AnyMessage({\n            receiver: abi.encode(dest.receiverBridge),\n            data: data,\n            tokenAmounts: new IRouterClient.TokenAmount[](1),\n            feeToken: feeToken,\n            extraArgs: \"\"\n        });\n        \n        message.tokenAmounts[0] = IRouterClient.TokenAmount({\n            token: weth9,\n            amount: amount,\n            amountType: IRouterClient.TokenAmountType.Fiat\n        });\n        \n        return ccipRouter.getFee(destinationChainSelector, message);\n    }\n    \n    /**\n     * @notice Add destination chain\n     */\n    function addDestination(\n        uint64 chainSelector,\n        address receiverBridge\n    ) external onlyAdmin {\n        require(receiverBridge != address(0), \"CCIPWETH9Bridge: zero address\");\n        require(!destinations[chainSelector].enabled, \"CCIPWETH9Bridge: destination already exists\");\n        \n        destinations[chainSelector] = DestinationChain({\n            chainSelector: chainSelector,\n            receiverBridge: receiverBridge,\n            enabled: true\n        });\n        destinationChains.push(chainSelector);\n        \n        emit DestinationAdded(chainSelector, receiverBridge);\n    }\n    \n    /**\n     * @notice Remove destination chain\n     */\n    function removeDestination(uint64 chainSelector) external onlyAdmin {\n        require(destinations[chainSelector].enabled, \"CCIPWETH9Bridge: destination not found\");\n        destinations[chainSelector].enabled = false;\n        \n        // Remove from array\n        for (uint256 i = 0; i < destinationChains.length; i++) {\n            if (destinationChains[i] == chainSelector) {\n                destinationChains[i] = destinationChains[destinationChains.length - 1];\n                destinationChains.pop();\n                break;\n            }\n        }\n        \n        emit DestinationRemoved(chainSelector);\n    }\n    \n    /**\n     * @notice Update destination receiver bridge\n     */\n    function updateDestination(\n        uint64 chainSelector,\n        address receiverBridge\n    ) external onlyAdmin {\n        require(destinations[chainSelector].enabled, \"CCIPWETH9Bridge: destination not found\");\n        require(receiverBridge != address(0), \"CCIPWETH9Bridge: zero address\");\n        \n        destinations[chainSelector].receiverBridge = receiverBridge;\n        emit DestinationUpdated(chainSelector, receiverBridge);\n    }\n    \n    /**\n     * @notice Update fee token\n     */\n    function updateFeeToken(address newFeeToken) external onlyAdmin {\n        require(newFeeToken != address(0), \"CCIPWETH9Bridge: zero address\");\n        feeToken = newFeeToken;\n    }\n    \n    /**\n     * @notice Change admin\n     */\n    function changeAdmin(address newAdmin) external onlyAdmin {\n        require(newAdmin != address(0), \"CCIPWETH9Bridge: zero address\");\n        admin = newAdmin;\n    }\n    \n    /**\n     * @notice Get destination chains\n     */\n    function getDestinationChains() external view returns (uint64[] memory) {\n        return destinationChains;\n    }\n    \n    /**\n     * @notice Get user nonce\n     */\n    function getUserNonce(address user) external view returns (uint256) {\n        return nonces[user];\n    }\n}\n"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "viaIR": true,
    "evmVersion": "london",
    "outputSelection": {
      "*": {
        "*": [
          "abi",
          "evm.bytecode",
          "evm.deployedBytecode",
          "evm.bytecode.sourceMap",
          "evm.deployedBytecode.sourceMap"
        ]
      }
    }
  }
}