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ChainlinkCCIP.sol
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ChainlinkCCIP.sol
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// SPDX-License-Identifier: MIT
pragma solidity 0.8.19;
import {IRouterClient} from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol";
import {OwnerIsCreator} from "@chainlink/contracts-ccip/src/v0.8/shared/access/OwnerIsCreator.sol";
import {Client} from "@chainlink/contracts-ccip/src/v0.8/ccip/libraries/Client.sol";
import {IERC20} from "@chainlink/contracts-ccip/src/v0.8/vendor/openzeppelin-solidity/v4.8.0/token/ERC20/IERC20.sol";
import {LinkTokenInterface} from "@chainlink/contracts/src/v0.8/interfaces/LinkTokenInterface.sol";
contract ChainlinkCCIP is OwnerIsCreator {
error NotEnoughBalance(uint256 currentBalance, uint256 calculatedFees);
IRouterClient router;
LinkTokenInterface linkToken;
constructor(address _router, address _link) {
router = IRouterClient(_router);
linkToken = LinkTokenInterface(_link);
}
function transferTokens(
uint64 _destinationChainSelector,
address _receiver,
address _token,
uint256 _amount
)
external
onlyOwner
returns (bytes32 messageId)
{
Client.EVM2AnyMessage memory evm2AnyMessage = _buildCCIPMessage(
_receiver,
_token,
_amount,
address(0)
);
uint256 fees = router.getFee(_destinationChainSelector, evm2AnyMessage);
if (fees > address(this).balance)
revert NotEnoughBalance(address(this).balance, fees);
IERC20(_token).approve(address(router), _amount);
messageId = router.ccipSend{value: fees}(
_destinationChainSelector,
evm2AnyMessage
);
return messageId;
}
function _buildCCIPMessage(
address _receiver,
address _token,
uint256 _amount,
address _feeTokenAddress
) internal pure returns (Client.EVM2AnyMessage memory) {
Client.EVMTokenAmount[]
memory tokenAmounts = new Client.EVMTokenAmount[](1);
Client.EVMTokenAmount memory tokenAmount = Client.EVMTokenAmount({
token: _token,
amount: _amount
});
tokenAmounts[0] = tokenAmount;
Client.EVM2AnyMessage memory evm2AnyMessage = Client.EVM2AnyMessage({
receiver: abi.encode(_receiver),
data: "",
tokenAmounts: tokenAmounts,
extraArgs: Client._argsToBytes(Client.EVMExtraArgsV1({gasLimit: 0, strict: false})),
feeToken: _feeTokenAddress
});
return evm2AnyMessage;
}
function withdraw(address _beneficiary, address _token) public onlyOwner {
uint256 amountToken = IERC20(_token).balanceOf(address(this));
IERC20(_token).transfer(_beneficiary, amountToken);
}
receive() external payable {}
}