```\n/// @notice Extracts the outpoint tx id from an input\n/// @dev 32 byte tx id\n/// @param \_input The input\n/// @return The tx id (little-endian bytes)\nfunction extractInputTxIdLE(bytes memory \_input) internal pure returns (bytes32) {\n    return \_input.slice(0, 32).toBytes32();\n}\n```\n