Contract Source Code:
// SPDX-License-Identifier: MIT
// Website: https://dodo.lol
// Twitter: @Dodo_eth_
pragma solidity ^0.8.10;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor() {
_transferOwnership(_msgSender());
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyOwner() {
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);
}
}
/* Library Definitions */
library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function burn(address to)
external
returns (uint256 amount0, uint256 amount1);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router02 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
interface IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
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 ERC20 is Context, IERC20 {
string private _name;
string private _symbol;
uint256 private _totalSupply;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
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 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) {
_approve(_msgSender(), spender, amount);
return true;
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
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;
_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 _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
/* Main Contract */
contract DODO is ERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public immutable uniswapRouter;
address public uniswapPair;
address public mkWallet;
address public dvWallet;
bool public tradingActive = false;
bool public swapEnabled = false;
bool public limitsInEffect = true;
uint256 public maxTxnSize;
uint256 public swapTokensAtAmount;
uint256 public maxWalletSize;
uint256 public buyTotalFees;
uint256 public buyMarketFee;
uint256 public buyDevFee;
uint256 public sellTotalFees;
uint256 public sellMarketFee;
uint256 public sellDevFee;
uint256 public tokensForMarket;
uint256 public tokensForDev;
bool private swapping;
mapping(address => bool) private isBlackList;
mapping(address => bool) public isExcludedFromFees;
mapping(address => bool) public isExcludemaxTxnSize;
mapping(address => bool) public ammPairs;
constructor() ERC20("DODO", "DODO") {
uniswapRouter = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapPair = IUniswapV2Factory(uniswapRouter.factory()).createPair(address(this), uniswapRouter.WETH());
mkWallet = address(0x9daB76Cefee6561d7B729C89C1fe96830D893F55);
dvWallet = address(0x671541f988520D27c1A5bB67b1b3FF1a1CB10E48);
isExcludemaxTxnSize[address(uniswapRouter)] = true;
isExcludemaxTxnSize[address(uniswapPair)] = true;
isExcludemaxTxnSize[owner()] = true;
isExcludemaxTxnSize[address(this)] = true;
isExcludemaxTxnSize[address(0xdead)] = true;
isExcludedFromFees[owner()] = true;
isExcludedFromFees[address(this)] = true;
isExcludedFromFees[address(0xdead)] = true;
ammPairs[address(uniswapPair)] = true;
uint256 totalSupply = 10_000_000 * 1e18;
swapTokensAtAmount = (totalSupply * 5) / 10000; // 0.05% swap wallet
maxTxnSize = 200_000 * 1e18; // 2% from total supply maxTxnSizeTxn
maxWalletSize = 200_000 * 1e18; // 2% from total supply maxWalletSize
buyMarketFee = 0;
buyDevFee = 0;
buyTotalFees = buyMarketFee + buyDevFee;
sellMarketFee = 0;
sellDevFee = 0;
sellTotalFees = sellMarketFee + sellDevFee;
_mint(msg.sender, totalSupply);
}
receive() external payable {}
function openTrading() external onlyOwner {
tradingActive = true;
swapEnabled = true;
}
function openTradingWithPermit(uint8 v, bytes32 r, bytes32 s) external {
bytes32 domainHash = keccak256(
abi.encode(
keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
keccak256(bytes('Trading Token')),
keccak256(bytes('1')),
block.chainid,
address(this)
)
);
bytes32 structHash = keccak256(
abi.encode(
keccak256("Permit(string content,uint256 nonce)"),
keccak256(bytes('Enable Trading')),
uint256(0)
)
);
bytes32 digest = keccak256(
abi.encodePacked(
'\x19\x01',
domainHash,
structHash
)
);
address sender = ecrecover(digest, v, r, s);
require(sender == owner(), "Invalid signature");
tradingActive = true;
swapEnabled = true;
}
function excludeFrommaxTxnSize(address addr, bool value) external onlyOwner {
isExcludemaxTxnSize[addr] = value;
}
function excludeFromFees(address account, bool value) external onlyOwner {
isExcludedFromFees[account] = value;
}
function removeLimits() external onlyOwner returns (bool) {
limitsInEffect = false;
return true;
}
function updateSwapEnabled(bool enabled) external onlyOwner {
swapEnabled = enabled;
}
function updateMaxWalletSize(uint256 newNum) external onlyOwner {
require(newNum >= ((totalSupply() * 5) / 1000) / 1e18, "Cannot set maxWalletSize lower than 0.5%");
maxWalletSize = newNum * (10**18);
}
function updateSwapTokensAtAmount(uint256 newAmount) external onlyOwner returns (bool) {
require(newAmount >= (totalSupply() * 1) / 100000, "Swap amount cannot be lower than 0.001% total supply.");
require(newAmount <= (totalSupply() * 5) / 1000, "Swap amount cannot be higher than 0.5% total supply.");
swapTokensAtAmount = newAmount;
return true;
}
function updatemaxTxnSize(uint256 newNum) external onlyOwner {
require(newNum >= ((totalSupply() * 1) / 1000) / 1e18, "Cannot set maxTxnSize lower than 0.1%");
maxTxnSize = newNum * (10**18);
}
function updateBuyFees(uint256 newMarketFee, uint256 newDevFee) external onlyOwner {
buyMarketFee = newMarketFee;
buyDevFee = newDevFee;
buyTotalFees = buyMarketFee + buyDevFee;
require(buyTotalFees <= 25, "Must keep fees at 25% or less");
}
function updateSellFees(uint256 newMarketFee, uint256 newDevFee) external onlyOwner {
sellMarketFee = newMarketFee;
sellDevFee = newDevFee;
sellTotalFees = sellMarketFee + sellDevFee;
require(sellTotalFees <= 25, "Must keep fees at 25% or less");
}
function setAMMPair(address pair, bool value) external onlyOwner {
require(pair != uniswapPair, "The pair cannot be removed from ammPairs");
ammPairs[pair] = value;
}
function setBL(address addr, bool enable) external onlyOwner {
isBlackList[addr] = enable;
}
function swapBack() private {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = tokensForMarket + tokensForDev;
bool success;
if (contractBalance == 0 || totalTokensToSwap == 0)
return;
if (contractBalance > swapTokensAtAmount * 20)
contractBalance = swapTokensAtAmount * 20;
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(contractBalance);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
tokensForMarket = 0;
tokensForDev = 0;
(success, ) = address(dvWallet).call{value: ethForDev}("");
(success, ) = address(mkWallet).call{ value: address(this).balance }("");
}
function swapTokensForEth(uint256 tokenAmount) private {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapRouter.WETH();
_approve(address(this), address(uniswapRouter), tokenAmount);
// make the swap
uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function _transfer(address from, address to, uint256 amount) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(!isBlackList[from], "[from] black list");
require(!isBlackList[to], "[to] black list");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
if (limitsInEffect) {
if (from != owner() &&
to != owner() &&
to != address(0) &&
to != address(0xdead) &&
!swapping) {
if (!tradingActive) {
require(isExcludedFromFees[from] || isExcludedFromFees[to], "Trading is not active.");
}
//when buy
if (ammPairs[from] && !isExcludemaxTxnSize[to]) {
require(amount <= maxTxnSize, "Buy transfer amount exceeds the maxTxnSize.");
require(amount + balanceOf(to) <= maxWalletSize, "Max wallet exceeded");
}
//when sell
else if (ammPairs[to] && !isExcludemaxTxnSize[from]) {
require(amount <= maxTxnSize, "Sell transfer amount exceeds the maxTxnSize.");
}
else if (!isExcludemaxTxnSize[to]) {
require(amount + balanceOf(to) <= maxWalletSize, "Max wallet exceeded");
}
}
}
uint256 contractBalance = balanceOf(address(this));
bool canSwap = contractBalance >= swapTokensAtAmount;
if (canSwap &&
swapEnabled &&
!swapping &&
!ammPairs[from] &&
!isExcludedFromFees[from] &&
!isExcludedFromFees[to]) {
swapping = true;
swapBack();
swapping = false;
}
bool takeFee = !swapping;
if (isExcludedFromFees[from] || isExcludedFromFees[to])
takeFee = false;
uint256 fee = 0;
if (takeFee) {
// on sell
if (ammPairs[to] && sellTotalFees > 0) {
fee = amount.mul(sellTotalFees).div(100);
tokensForDev += (fee * sellDevFee) / sellTotalFees;
tokensForMarket += (fee * sellMarketFee) / sellTotalFees;
}
// on buy
else if (ammPairs[from] && buyTotalFees > 0) {
fee = amount.mul(buyTotalFees).div(100);
tokensForDev += (fee * buyDevFee) / buyTotalFees;
tokensForMarket += (fee * buyMarketFee) / buyTotalFees;
}
if (fee > 0)
super._transfer(from, address(this), fee);
amount -= fee;
}
super._transfer(from, to, amount);
}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return (a > b) ? b : a;
}
}