Contract Name:
ChainPaint741
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
contract Ownable {
address _owner;
event RenounceOwnership();
constructor() {
_owner = msg.sender;
}
modifier onlyOwner() {
require(_owner == msg.sender, "only owner");
_;
}
function owner() external view virtual returns (address) {
return _owner;
}
function ownerRenounce() public onlyOwner {
_owner = address(0);
emit RenounceOwnership();
}
function transferOwnership(address newOwner) external onlyOwner {
_owner = newOwner;
}
}
//ChainPaint is a gamified art project fully hosted on-chain, where participants use ERC20 $PXL tokens to collectively paint a live ERC721 canvas to create a unique piece of bitmap art - saved permanently to the blockchain.
//TG: t.me/ChainPaint
//X: twitter.com/ChainPaint
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
import "./PoolCreatableErc741.sol";
import "../lib/Ownable.sol";
contract ChainPaint741 is PoolCreatableErc741, Ownable {
uint256 constant _startTotalSupply = 100000 * (10 ** _decimals);
uint256 constant _startMaxBuyCount = (_startTotalSupply * 5) / 10000;
uint256 constant _addMaxBuyPercentPerSec = 1; // 100%=_addMaxBuyPrecesion add 0.005%/second
uint256 constant _addMaxBuyPrecesion = 10000;
uint256 _taxBuy = 250;
uint256 _taxSell = 250;
uint256 constant _taxPrecesion = 1000;
uint256 constant _transferZeroTaxSeconds = 1000; // zero tax transfer time
address _deployer;
address immutable _withdrawer;
address public immutable rewardPool;
uint256 public devShare = 50;
uint256 public devSharePrecision = 100;
uint256 public devShareMax = 50;
constructor(
address rewardPool_,
address routerAddress
) PoolCreatableErc741("ChainPaint", "PXL", routerAddress) {
_deployer = msg.sender;
_withdrawer = msg.sender;
rewardPool = rewardPool_;
}
modifier maxBuyLimit(uint256 amount) {
require(amount <= maxBuy(), "max buy limit");
_;
}
receive() external payable {
uint256 devFee = (msg.value * devShare) / devSharePrecision;
bool sent;
if (devFee > 0) {
(sent, ) = payable(_withdrawer).call{value: devFee}("");
require(sent, "sent fee error: dev ether is not sent");
}
(sent, ) = payable(rewardPool).call{value: msg.value - devFee}("");
require(sent, "sent fee error: rewardPool ether is not sent");
}
function setTax(uint256 taxBuy, uint256 taxSell) external onlyOwner {
require(taxBuy < 250);
require(taxSell < 250);
_taxBuy = taxBuy;
_taxSell = taxSell;
}
function setDevShare(uint256 newDevShare) external onlyOwner {
require(newDevShare <= devShareMax);
devShare = newDevShare;
}
function createPairCount() internal pure override returns (uint256) {
return _startTotalSupply;
}
function maxBuy() public view returns (uint256) {
if (!isStarted()) return _startTotalSupply;
uint256 count = _startMaxBuyCount +
(_startTotalSupply *
(block.timestamp - _startTime) *
_addMaxBuyPercentPerSec) /
_addMaxBuyPrecesion;
if (count > _startTotalSupply) count = _startTotalSupply;
return count;
}
function transferTax() public view returns (uint256) {
if (!isStarted()) return 0;
uint256 deltaTime = block.timestamp - _startTime;
if (deltaTime >= _transferZeroTaxSeconds) return 0;
return
(_taxPrecesion * (_transferZeroTaxSeconds - deltaTime)) /
_transferZeroTaxSeconds;
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
// allow burning
if (to == address(0)) {
_burn(from, amount);
return;
}
// system transfers
if (
from == address(0) ||
from == address(this) ||
from == _deployer ||
to == _deployer
) {
super._transfer(from, to, amount);
return;
}
// transfers with fee
if (_feeLocked) {
super._transfer(from, to, amount);
return;
} else {
if (from == _pair) {
buy(to, amount);
return;
} else if (to == _pair) {
sell(from, amount);
return;
} else transferFithFee(from, to, amount);
}
}
function buy(
address to,
uint256 amount
) private maxBuyLimit(amount) lockFee {
uint256 tax = (amount * _taxBuy) / _taxPrecesion;
if (tax > 0) super._transfer(_pair, address(this), tax);
super._transfer(_pair, to, amount - tax);
}
function sell(address from, uint256 amount) private lockFee {
_sellTokens();
uint256 tax = (amount * _taxBuy) / _taxPrecesion;
if (tax > 0) super._transfer(from, address(this), tax);
super._transfer(from, _pair, amount - tax);
}
function _sellTokens() private {
uint256 sellCount = balanceOf(address(this));
uint256 maxSwapCount = sellCount * 2;
if (sellCount > maxSwapCount) sellCount = maxSwapCount;
_sellTokens(sellCount, address(this));
}
function transferFithFee(
address from,
address to,
uint256 amount
) private lockFee {
uint256 tax = (amount * transferTax()) / _taxPrecesion;
if (tax > 0) _burn(from, tax);
super._transfer(from, to, amount - tax);
}
function burnCount() public view returns (uint256) {
return _startTotalSupply - totalSupply();
}
}
pragma solidity ^0.8.23;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import "@openzeppelin/contracts/utils/Context.sol";
contract ERC741 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) internal _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 internal _totalSupply;
uint8 internal constant _decimals = 9;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the default value returned by this function, unless
* it's overridden.
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public pure returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(
address account
) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(
address to,
uint256 amount
) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(
address owner,
address spender
) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(
address spender,
uint256 amount
) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
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;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(
address spender,
uint256 addedValue
) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
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;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
uint256 fromBalance = _balances[from];
require(
fromBalance >= amount,
"ERC20: transfer amount exceeds balance"
);
unchecked {
_balances[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_balances[to] += amount;
}
emit Transfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply += amount;
unchecked {
// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
}
/**
* @dev Erases `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
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);
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
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);
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB)
external
returns (address pair);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
interface IUniswapV2Router02 {
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
function swapExactETHForTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable returns (uint[] memory amounts);
function getReserves(
address factory,
address tokenA,
address tokenB
) external view returns (uint reserveA, uint reserveB);
function getAmountsIn(
uint amountOut,
address[] memory path
) external view returns (uint[] memory amounts);
function getAmountsOut(
uint amountIn,
address[] memory path
) external view returns (uint[] memory amounts);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.23;
import "./ERC741.sol";
import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
import "../lib/Ownable.sol";
abstract contract PoolCreatableErc741 is ERC741 {
IUniswapV2Router02 immutable uniswapV2Router;
address internal _pair;
uint256 internal _startTime;
bool internal _feeLocked;
constructor(
string memory name_,
string memory symbol_,
address routerAddress
) ERC741(name_, symbol_) {
uniswapV2Router = IUniswapV2Router02(routerAddress);
}
modifier lockFee() {
_feeLocked = true;
_;
_feeLocked = false;
}
function createPair() external payable {
_pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
address(this),
uniswapV2Router.WETH()
);
_mint(address(this), createPairCount());
_approve(address(this), address(uniswapV2Router), type(uint256).max);
uniswapV2Router.addLiquidityETH{value: msg.value}(
address(this),
createPairCount(),
0,
0,
msg.sender,
block.timestamp
);
_startTime = block.timestamp;
}
function isStarted() internal view returns (bool) {
return _pair != address(0);
}
function createPairCount() internal pure virtual returns (uint256);
function _sellTokens(uint256 tokenAmount, address to) internal lockFee {
if (tokenAmount == 0) return;
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
// make the swap
uniswapV2Router.swapExactTokensForETH(
tokenAmount,
0, // accept any amount of ETH
path,
to,
block.timestamp
);
}
}