69 lines
2.7 KiB
Solidity
69 lines
2.7 KiB
Solidity
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// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.19;
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import "../ccip/IRouterClient.sol";
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import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
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import "@openzeppelin/contracts/access/AccessControl.sol";
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/**
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* @title CCIP Relay Bridge (LINK)
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* @notice Accepts relayed CCIP messages carrying canonical LINK on the destination chain.
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* @dev Companion to CCIPRelayBridge (WETH9-only). Grant ROUTER_ROLE to the same CCIPRelayRouter.
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*/
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contract CCIPRelayBridgeLINK is AccessControl {
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bytes32 public constant ROUTER_ROLE = keccak256("ROUTER_ROLE");
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address public immutable link;
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address public relayRouter;
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mapping(bytes32 => bool) public processedTransfers;
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event CrossChainTransferCompleted(
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bytes32 indexed messageId,
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uint64 indexed sourceChainSelector,
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address indexed recipient,
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uint256 amount
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);
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constructor(address _link, address _relayRouter) {
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require(_link != address(0), "CCIPRelayBridgeLINK: zero LINK");
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require(_relayRouter != address(0), "CCIPRelayBridgeLINK: zero router");
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link = _link;
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relayRouter = _relayRouter;
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_grantRole(ROUTER_ROLE, _relayRouter);
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_grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
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}
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function updateRelayRouter(address newRelayRouter) external onlyRole(DEFAULT_ADMIN_ROLE) {
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require(newRelayRouter != address(0), "CCIPRelayBridgeLINK: zero address");
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_revokeRole(ROUTER_ROLE, relayRouter);
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relayRouter = newRelayRouter;
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_grantRole(ROUTER_ROLE, newRelayRouter);
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}
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function ccipReceive(IRouterClient.Any2EVMMessage calldata message) external onlyRole(ROUTER_ROLE) {
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require(!processedTransfers[message.messageId], "CCIPRelayBridgeLINK: already processed");
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processedTransfers[message.messageId] = true;
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require(message.tokenAmounts.length > 0, "CCIPRelayBridgeLINK: no tokens");
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require(message.tokenAmounts[0].token == link, "CCIPRelayBridgeLINK: invalid token");
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uint256 amount = message.tokenAmounts[0].amount;
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require(amount > 0, "CCIPRelayBridgeLINK: invalid amount");
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address recipient;
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if (message.data.length == 64) {
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(recipient, ) = abi.decode(message.data, (address, uint256));
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} else if (message.data.length >= 128) {
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(recipient, , , ) = abi.decode(message.data, (address, uint256, address, uint256));
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} else {
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revert("CCIPRelayBridgeLINK: invalid data");
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}
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require(recipient != address(0), "CCIPRelayBridgeLINK: zero recipient");
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require(IERC20(link).transfer(recipient, amount), "CCIPRelayBridgeLINK: transfer failed");
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emit CrossChainTransferCompleted(message.messageId, message.sourceChainSelector, recipient, amount);
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}
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}
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