// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.26;

library LibSwap {
    /// Returns the InToken index into an array of tokens
    function tokenInIndex(
        bytes calldata swap
    ) internal pure returns (uint8 res) {
        res = uint8(swap[0]);
    }

    /// The OutToken index into an array of tokens
    function tokenOutIndex(
        bytes calldata swap
    ) internal pure returns (uint8 res) {
        res = uint8(swap[1]);
    }

    /// The relative amount of token quantity routed into this swap
    function splitPercentage(
        bytes calldata swap
    ) internal pure returns (uint24 res) {
        res = uint24(bytes3(swap[2:5]));
    }

    /// The address of the executor contract
    function executor(bytes calldata swap) internal pure returns (address res) {
        res = address(uint160(bytes20(swap[5:25])));
    }

    /// Remaining bytes are interpreted as protocol data
    function protocolData(
        bytes calldata swap
    ) internal pure returns (bytes calldata res) {
        res = swap[25:];
    }
}