文件 1 的 1:Popo.sol
pragma solidity 0.8.19;
interface IERC20 {
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);
}
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
return c;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
}
contract Popo is IERC20, Ownable {
using SafeMath for uint256;
string private _name = "Popo, Pepe's Dog";
string private _symbol = "POPO";
uint8 private _decimals = 9;
uint256 private _totalSupply = 1000000000000000000 * (1**uint256(_decimals));
uint256 private constant _taxRate = 0;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _maxTokensPerWallet = 21000000000000000;
bool private _buyLimitEnabled = true;
modifier checkBuyLimit(address sender, uint256 amount) {
require(!_buyLimitEnabled || (amount <= _maxTokensPerWallet || sender == owner()), "Buy limit exceeded");
_;
}
function setMaxTokensPerWallet(uint256 newLimit) external onlyOwner {
require(newLimit > 0, "Limit must be greater than zero");
_maxTokensPerWallet = newLimit;
}
function enableBuyLimit() external onlyOwner {
_buyLimitEnabled = true;
}
function disableBuyLimit() external onlyOwner {
_buyLimitEnabled = false;
}
address private _owner;
constructor() {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
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) {
require(amount > 0, "Amount must be greater than zero");
_transfer(msg.sender, recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
require(amount > 0, "Amount must be greater than zero");
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount));
return true;
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function increaseAllowance(address spender, uint256 addedAmount) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedAmount));
return true;
}
function decreaseAllowance(address spender, uint256 subtractedAmount) public returns (bool) {
_approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedAmount));
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal checkBuyLimit(sender, amount) {
uint256 taxAmount = amount.mul(_taxRate).div(100);
uint256 transferAmount = amount.sub(taxAmount);
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(transferAmount);
emit Transfer(sender, recipient, transferAmount);
}
function _approve(address owner, address spender, uint256 amount) internal {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function getCurrentTime() external view returns (uint256) {
return block.timestamp;
}
function doNothing25() external pure returns (bool) {
return true;
}
}
{
"compilationTarget": {
"Popo.sol": "Popo"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}