Ofir (OFIR)

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// Criador: Cleyton Gonçalves - CEO e Fundador do token Ofir
contract Ofir {
    string public name = "Ofir";
    string public symbol = "OFIR";
    uint8 public decimals = 12;
    uint256 public totalSupply;
    address public owner;

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Burn(address indexed from, uint256 value);
    event Tax(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    constructor() {
        owner = msg.sender;
        totalSupply = 1_000_000_000 * 10 ** decimals;
        balanceOf[owner] = totalSupply;
    }

    function transfer(address _to, uint256 _value) public returns (bool success) {
        require(balanceOf[msg.sender] >= _value, "Saldo insuficiente");
        uint256 burnAmount = (_value * 1) / 100;
        uint256 taxAmount = (_value * 2) / 100;
        uint256 sendAmount = _value - burnAmount - taxAmount;

        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += sendAmount;
        balanceOf[owner] += taxAmount;
        totalSupply -= burnAmount;

        emit Burn(msg.sender, burnAmount);
        emit Tax(msg.sender, owner, taxAmount);
        emit Transfer(msg.sender, _to, sendAmount);

        return true;
    }

    function approve(address _spender, uint256 _value) public returns (bool success) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
        require(_value <= balanceOf[_from], "Saldo insuficiente");
        require(_value <= allowance[_from][msg.sender], "Sem autorizacao");

        uint256 burnAmount = (_value * 1) / 100;
        uint256 taxAmount = (_value * 2) / 100;
        uint256 sendAmount = _value - burnAmount - taxAmount;

        balanceOf[_from] -= _value;
        balanceOf[_to] += sendAmount;
        balanceOf[owner] += taxAmount;
        allowance[_from][msg.sender] -= _value;
        totalSupply -= burnAmount;

        emit Burn(_from, burnAmount);
        emit Tax(_from, owner, taxAmount);
        emit Transfer(_from, _to, sendAmount);

        return true;
    }
}