/**
 
*/

//

// JOE ON BASE

//
//
//

//

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

interface ICustomERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

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

contract JOE is ICustomERC20 {
    string public constant name = "JOE";
    string public constant symbol = "JOE";
    uint8 public constant decimals = 18;
    uint256 private _totalSupply = uint256(1000000000) * 10**decimals;

    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    address public owner;
    address public feeAddress; // Endereço para receber as taxas
    uint256 public transferFeeRate = 0; // Taxa de transferência (inicialmente 0%)
    uint256 public maxTransferFee = 0; // Taxa máxima de transferência (inicialmente 0)
    bool public feeEnabled = false; // Taxas desabilitadas por padrão

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    event FeeEnabled(bool enabled);
    event FeeAddressUpdated(address indexed newFeeAddress);
    event TransferFeeUpdated(uint256 newFeeRate, uint256 newMaxFee);

    modifier onlyOwner() {
        require(msg.sender == owner, "Caller is not the owner");
        _;
    }

    constructor() {
        owner = msg.sender;
        _balances[owner] = _totalSupply;
        emit Transfer(address(0), owner, _totalSupply);
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address tokenOwner, address spender) public view override returns (uint256) {
        return _allowances[tokenOwner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
        return true;
    }

    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(owner, address(0));
        owner = address(0);
    }

    // Função para habilitar/desabilitar taxas
    function setFeeEnabled(bool enabled) public onlyOwner {
        feeEnabled = enabled;
        emit FeeEnabled(enabled);
    }

    // Função para definir o endereço que recebe as taxas
    function setFeeAddress(address newFeeAddress) public onlyOwner {
        require(newFeeAddress != address(0), "Fee address cannot be zero");
        feeAddress = newFeeAddress;
        emit FeeAddressUpdated(newFeeAddress);
    }

    // Função para definir a taxa de transferência e a taxa máxima
    function setTransferFee(uint256 newFeeRate, uint256 newMaxFee) public onlyOwner {
        require(newFeeRate <= 100, "Fee rate cannot exceed 100%");
        transferFeeRate = newFeeRate;
        maxTransferFee = newMaxFee;
        emit TransferFeeUpdated(newFeeRate, newMaxFee);
    }

    // Função interna para calcular a taxa de transferência
    function _calculateFee(uint256 amount) internal view returns (uint256) {
        if (!feeEnabled) return 0;
        uint256 fee = (amount * transferFeeRate) / 100;
        return fee > maxTransferFee && maxTransferFee > 0 ? maxTransferFee : fee;
    }

    // Função interna para transferir tokens com suporte a taxas
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "Transfer from the zero address");
        require(recipient != address(0), "Transfer to the zero address");
        require(_balances[sender] >= amount, "Transfer amount exceeds balance");

        uint256 fee = _calculateFee(amount);
        uint256 amountAfterFee = amount - fee;

        _balances[sender] -= amount;
        _balances[recipient] += amountAfterFee;

        if (fee > 0 && feeAddress != address(0)) {
            _balances[feeAddress] += fee;
            emit Transfer(sender, feeAddress, fee);
        }

        emit Transfer(sender, recipient, amountAfterFee);
    }

    // Função interna para aprovar gastos
    function _approve(address tokenOwner, address spender, uint256 amount) internal {
        require(tokenOwner != address(0), "Approve from the zero address");
        require(spender != address(0), "Approve to the zero address");

        _allowances[tokenOwner][spender] = amount;
        emit Approval(tokenOwner, spender, amount);
    }
}

{
  "compilationTarget": {
    "JOE.sol": "JOE"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}