编译器
0.8.17+commit.8df45f5f
文件 1 的 9:Context.sol
pragma solidity ^0.8.0;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
文件 2 的 9:ERC20.sol
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
function name() public view virtual override returns (string memory) {
return _name;
}
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
function decimals() public view virtual override returns (uint8) {
return 18;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
_balances[to] += amount;
}
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
unchecked {
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
文件 3 的 9:Friends.sol
pragma solidity ^0.8.9;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "./interface/IUniswapRouter.sol";
import "./interface/IUniswapFactory.sol";
contract FarmerFriends is ERC20, Ownable, ReentrancyGuard {
address public uniswapV2Pair;
address public immutable WETH;
IUniswapRouter public immutable uniswapV2Router;
bool public tradingEnabled = false;
bool public maxWalletEnabled = true;
uint256 public maxWalletPercentage = 50;
address public marketingWallet;
uint256 public buyTax = 1000;
uint256 public sellTax = 3000;
uint256 private minSwapAmt;
mapping(address => bool) private _isExcludedWallet;
mapping(address => bool) private _blockUsers;
event UniswapPairUpdated(address pair);
event MaxWalletEnabledUpdated(bool value);
event MaxWalletPercentageUpdated(uint256 value);
event MarketingWalletUpdated(address marketing);
event ExclusionFromMaxWalletUpdated(address account, bool value);
event TradingEnabledUpdated(bool value);
constructor(address _router, address _marketing) ERC20("Farmer Friends", "FRENS") {
_mint(msg.sender, 100000000 * 10 ** 18);
marketingWallet = _marketing;
uniswapV2Router = IUniswapRouter(_router);
WETH = uniswapV2Router.WETH();
uniswapV2Pair = IUniswapFactory(uniswapV2Router.factory()).createPair(
WETH,
address(this)
);
_isExcludedWallet[_router] = true;
_isExcludedWallet[owner()] = true;
_isExcludedWallet[address(this)] = true;
_isExcludedWallet[uniswapV2Pair] = true;
}
modifier nonBlock() {
require(!_blockUsers[msg.sender], "Blocked user");
_;
}
function updateUniswapPair(address pair) external onlyOwner {
if (uniswapV2Pair != address(0))
delete _isExcludedWallet[uniswapV2Pair];
uniswapV2Pair = pair;
_isExcludedWallet[uniswapV2Pair] = true;
emit UniswapPairUpdated(pair);
}
function updateMarketingWallet(address marketing) external onlyOwner {
marketingWallet = marketing;
emit MarketingWalletUpdated(marketing);
}
function updateMaxWalletEnabled(bool value) external onlyOwner {
maxWalletEnabled = value;
emit MaxWalletEnabledUpdated(value);
}
function updateMaxWalletPercentage(
uint256 newMaxWalletPercentage
) external onlyOwner {
require(newMaxWalletPercentage <= 1e4, "Invalid percent");
maxWalletPercentage = newMaxWalletPercentage;
emit MaxWalletPercentageUpdated(newMaxWalletPercentage);
}
function setExclusionFromMaxWallet(
address account,
bool value
) external onlyOwner {
_isExcludedWallet[account] = value;
emit ExclusionFromMaxWalletUpdated(account, value);
}
function enableTrading() external onlyOwner {
tradingEnabled = true;
emit TradingEnabledUpdated(true);
}
function setMinAmount(uint256 minAmt) external onlyOwner {
minSwapAmt = minAmt;
}
function setTax(uint256 buy, uint256 sell) external onlyOwner {
buyTax = buy;
sellTax = sell;
}
function setBlockUser(
address[] memory users,
bool flag
) external onlyOwner {
for (uint16 i; i < users.length; ++i) {
if (flag) _blockUsers[users[i]] = true;
else delete _blockUsers[users[i]];
}
}
function isExcludedWallet(address account) external view returns (bool) {
return _isExcludedWallet[account];
}
function isBlocked(address account) external view returns (bool) {
return _blockUsers[account];
}
function _distributeReward() internal {
uint256 tokenAmt = balanceOf(address(this));
if (tokenAmt > minSwapAmt) {
_approve(address(this), address(uniswapV2Router), tokenAmt);
address[] memory paths = new address[](2);
paths[0] = address(this);
paths[1] = WETH;
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmt,
0,
paths,
payable(marketingWallet),
block.timestamp + 2 hours
);
}
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override nonBlock {
require(
!_blockUsers[recipient] && !_blockUsers[sender],
"Blocked address"
);
require(
tradingEnabled || sender == owner() || recipient == owner(),
"Trading is not enabled yet"
);
if (maxWalletEnabled && !_isExcludedWallet[recipient]) {
require(
balanceOf(recipient) + amount <=
(totalSupply() * maxWalletPercentage) / 1e4,
"Exceeds max wallet limit"
);
}
uint256 taxAmt = 0;
if (uniswapV2Pair == sender) {
unchecked {
if (!_isExcludedWallet[recipient])
taxAmt = (amount * buyTax) / 1e4;
}
} else if (uniswapV2Pair == recipient) {
unchecked {
if (!_isExcludedWallet[sender])
taxAmt = (amount * sellTax) / 1e4;
}
} else {
_distributeReward();
}
if (taxAmt != 0) {
unchecked {
super._transfer(sender, address(this), taxAmt);
amount -= taxAmt;
}
}
super._transfer(sender, recipient, amount);
}
}
文件 4 的 9:IERC20.sol
pragma solidity ^0.8.0;
interface IERC20 {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, 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 from,
address to,
uint256 amount
) external returns (bool);
}
文件 5 的 9:IERC20Metadata.sol
pragma solidity ^0.8.0;
import "../IERC20.sol";
interface IERC20Metadata is IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
文件 6 的 9:IUniswapFactory.sol
pragma solidity ^0.8.9;
interface IUniswapFactory {
function createPair(
address tokenA,
address tokenB
) external returns (address pair);
}
文件 7 的 9:IUniswapRouter.sol
pragma solidity ^0.8.9;
interface IUniswapRouter {
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
)
external
payable
returns (uint amountToken, uint amountETH, uint liquidity);
function WETH() external view returns (address);
function factory() external view returns (address);
}
文件 8 的 9:Ownable.sol
pragma solidity ^0.8.0;
import "../utils/Context.sol";
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
modifier onlyOwner() {
_checkOwner();
_;
}
function owner() public view virtual returns (address) {
return _owner;
}
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
文件 9 的 9:ReentrancyGuard.sol
pragma solidity ^0.8.0;
abstract contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
}
function _nonReentrantAfter() private {
_status = _NOT_ENTERED;
}
}
{
"compilationTarget": {
"contracts/Friends.sol": "FarmerFriends"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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