// SPDX-License-Identifier: GPL-3.0-or-later
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

pragma solidity ^0.8.0;

/**
 * @title BytesHelpers
 * @dev Provides a list of Bytes helper methods
 */
library BytesHelpers {
    /**
     * @dev The length is shorter than start plus 32
     */
    error BytesOutOfBounds(uint256 start, uint256 length);

    /**
     * @dev Concatenates an address to a bytes array
     */
    function concat(bytes memory self, address value) internal pure returns (bytes memory) {
        return abi.encodePacked(self, value);
    }

    /**
     * @dev Concatenates an uint24 to a bytes array
     */
    function concat(bytes memory self, uint24 value) internal pure returns (bytes memory) {
        return abi.encodePacked(self, value);
    }

    /**
     * @dev Decodes a bytes array into an uint256
     */
    function toUint256(bytes memory self) internal pure returns (uint256) {
        return toUint256(self, 0);
    }

    /**
     * @dev Reads an uint256 from a bytes array starting at a given position
     */
    function toUint256(bytes memory self, uint256 start) internal pure returns (uint256 result) {
        if (self.length < start + 32) revert BytesOutOfBounds(start, self.length);
        assembly {
            result := mload(add(add(self, 0x20), start))
        }
    }
}