library Addresses {
    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function performEthTransfer(address recipient, uint256 amount) internal {
        (bool success, ) = recipient.call{value: amount}(""); // NOLINT: low-level-calls.
        require(success, "ETH_TRANSFER_FAILED");
    }

    /*
      Safe wrapper around ERC20/ERC721 calls.
      This is required because many deployed ERC20 contracts don't return a value.
      See https://github.com/ethereum/solidity/issues/4116.
    */
    function safeTokenContractCall(address tokenAddress, bytes memory callData) internal {
        require(isContract(tokenAddress), "BAD_TOKEN_ADDRESS");
        // NOLINTNEXTLINE: low-level-calls.
        (bool success, bytes memory returndata) = tokenAddress.call(callData);
        require(success, string(returndata));

        if (returndata.length > 0) {
            require(abi.decode(returndata, (bool)), "TOKEN_OPERATION_FAILED");
        }
    }

    /*
      Similar to safeTokenContractCall, but always ignores the return value.

      Assumes some other method is used to detect the failures
      (e.g. balance is checked before and after the call).
    */
    function uncheckedTokenContractCall(address tokenAddress, bytes memory callData) internal {
        // NOLINTNEXTLINE: low-level-calls.
        (bool success, bytes memory returndata) = tokenAddress.call(callData);
        require(success, string(returndata));
    }

}
/*
 Common Utility librarries.
 I. Addresses (extending address).
 */
function uncheckedTokenContractCall(address tokenAddress, bytes memory callData) internal {
        // NOLINTNEXTLINE: low-level-calls.
        (bool success, bytes memory returndata) = tokenAddress.call(callData);
        require(success, string(returndata));
    }
/*
 Similar to safeTokenContractCall, but always ignores the return value.
 
 Assumes some other method is used to detect the failures
 (e.g. balance is checked before and after the call).
 */