File size: 2,981 Bytes
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract MztacatCommunity {
string public name = "MztacatCommunity";
string public symbol = "MZT";
uint8 public decimals = 18;
uint256 public totalSupply = 1000000 * (10 ** uint256(decimals));
address public owner;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowances;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor() {
owner = msg.sender;
balances[owner] = totalSupply;
}
modifier onlyOwner() {
require(msg.sender == owner, "Only the owner can call this function.");
_;
}
function balanceOf(address account) public view returns (uint256) {
return balances[account];
}
function transfer(address recipient, uint256 amount) public returns (bool) {
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount <= balances[msg.sender], "ERC20: transfer amount exceeds balance");
balances[msg.sender] -= amount;
balances[recipient] += amount;
emit Transfer(msg.sender, recipient, amount);
return true;
}
function approve(address spender, uint256 amount) public returns (bool) {
allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
require(recipient != address(0), "ERC20: transfer to the zero address");
require(amount <= balances[sender], "ERC20: transfer amount exceeds balance");
require(amount <= allowances[sender][msg.sender], "ERC20: transfer amount exceeds allowance");
balances[sender] -= amount;
balances[recipient] += amount;
allowances[sender][msg.sender] -= amount;
emit Transfer(sender, recipient, amount);
return true;
}
function allowance(address account, address spender) public view returns (uint256) {
return allowances[account][spender];
}
function burn(uint256 amount) public returns (bool) {
require(amount <= balances[msg.sender], "ERC20: burn amount exceeds balance");
balances[msg.sender] -= amount;
totalSupply -= amount;
emit Transfer(msg.sender, address(0), amount);
return true;
}
function mint(uint256 amount) public onlyOwner returns (bool) {
require(totalSupply + amount <= 2**256 - 1, "ERC20: total supply exceeds uint256");
balances[owner] += amount;
totalSupply += amount;
emit Transfer(address(0), owner, amount);
return true;
}
}
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