all files / contracts/ Utils.sol

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// SPDX-License-Identifier: GPL-2.0-or-later
 
pragma solidity ^0.8.0;
 
import "./Interfaces.sol";
 
library Utils {
    function safeTransferFrom(address token, address from, address to, uint value) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), string(data));
    }
 
    function safeTransfer(address token, address to, uint value) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), string(data));
    }
 
    function safeApprove(address token, address to, uint value) internal {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(IERC20.approve.selector, to, value));
        Erequire(success && (data.length == 0 || abi.decode(data, (bool))), string(data));
    }
}