// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity >=0.7.5 <0.9.0;

// solhint-disable no-inline-assembly

library Exec {

    function call(
        address to,
        uint256 value,
        bytes memory data,
        uint256 txGas
    ) internal returns (bool success) {
        assembly {
            success := call(txGas, to, value, add(data, 0x20), mload(data), 0, 0)
        }
    }

    function staticcall(
        address to,
        bytes memory data,
        uint256 txGas
    ) internal view returns (bool success) {
        assembly {
            success := staticcall(txGas, to, add(data, 0x20), mload(data), 0, 0)
        }
    }

    function delegateCall(
        address to,
        bytes memory data,
        uint256 txGas
    ) internal returns (bool success) {
        assembly {
            success := delegatecall(txGas, to, add(data, 0x20), mload(data), 0, 0)
        }
    }

    // get returned data from last call or calldelegate
    function getReturnData() internal pure returns (bytes memory returnData) {
        assembly {
            let ptr := mload(0x40)
            mstore(0x40, add(ptr, add(returndatasize(), 0x20)))
            mstore(ptr, returndatasize())
            returndatacopy(add(ptr, 0x20), 0, returndatasize())
            returnData := ptr
        }
    }

    // revert with explicit byte array (probably reverted info from call)
    function revertWithData(bytes memory returnData) internal pure {
        assembly {
            revert(add(returnData, 32), mload(returnData))
        }
    }

    function callAndRevert(address to, bytes memory data) internal {
        bool success = call(to,0,data,gasleft());
        if (!success) {
            revertWithData(getReturnData());
        }
    }
}