Hash.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.21;

contract Hash{
    bytes32 _msg = keccak256(abi.encodePacked("0xAA"));

    // Identificador único de número
    function hash(
        uint _num,
        string memory _string,
        address _addr
    ) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(_num, _string, _addr));
    }

    // Resistência fraca a impactos
    function weak(
        string memory string1
    )public view returns (bool){
        return keccak256(abi.encodePacked(string1)) == _msg;
    }

    // Forte resistência ao impacto
    function strong(
        string memory string1,
        string memory string2
    )public pure returns (bool){
        return keccak256(abi.encodePacked(string1)) == keccak256(abi.encodePacked(string2));
    }
}