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contracts...SolidityBytes.sol

//SPDX-License-Identifier: Unlicense

pragma solidity ^0.8.0;

import "hardhat/console.sol";

library String {

    function convertToBytes(string memory self) public pure returns (bytes memory result) {
        bytes memory stringBytes = bytes(self);
        
        return stringBytes;
    }

    function convertToBytes32(string memory self) public pure returns (bytes32 result) {
        bytes memory tempEmptyStringTest = bytes(self);
        if (tempEmptyStringTest.length == 0) {
            return 0x0;
        }

        assembly {
            result := mload(add(self, 32))
        }
    }
}

contract SolidityBytes {
    using String for string;

    bytes _dynamicBytesStorage = new bytes(200);

    function convertToBytes(string memory input) external pure returns(bytes memory) {
        return input.convertToBytes();
    }

    function convertToBytes32(string memory input) external pure returns(bytes32) {
        return input.convertToBytes32();
    }

    function convertToString(bytes memory input) external pure returns(string memory) {
        return string(input);
    }

    function fixedBytesOne() external pure returns(bytes1) {
        // bytes1 b1 = hex"41";

        bytes1 b1 = 0x41;

        return b1;
    }

    function fixedBytes32() external pure returns(bytes32) {
        bytes32 b32 = hex"41";

        return b32;
    }

    function dynamicBytesStorage() external returns(bytes memory) {
        _dynamicBytesStorage.push(hex"41");

        console.log(string(_dynamicBytesStorage));

        return _dynamicBytesStorage;
    }

    function dynamicBytesMemory() external view returns(bytes memory) {
        bytes memory _dynamicBytesMemory = hex"41";

        console.log(string(_dynamicBytesMemory));

        return _dynamicBytesMemory;
    }

    function dynamicBytesMemoryNew() external view returns(bytes memory) {
        bytes memory _dynamicBytesMemoryNew = new bytes(200);

        _dynamicBytesMemoryNew[0] = hex"41";

        console.log(string(_dynamicBytesMemoryNew));

        return _dynamicBytesMemoryNew;
    }
}