Contract Source Code:
File 1 of 1 : Beaver
// SPDX-License-Identifier: MIT
/**
* https://t.me/beavercoinerc20
* https://twitter.com/BeaverCoinERC20
* https://linktr.ee/beavercoin
*/
pragma solidity 0.8.19;
library SafeMath {
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 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 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 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 getOwner() external view returns (address);
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
);
}
abstract contract Ownable {
address internal owner;
constructor(address _owner) {
owner = _owner;
}
modifier onlyOwner() {
require(isOwner(msg.sender), "!OWNER");
_;
}
function isOwner(address account) public view returns (bool) {
return account == owner;
}
function transferOwnership(address payable adr) public onlyOwner {
owner = adr;
emit OwnershipTransferred(adr);
}
event OwnershipTransferred(address owner);
}
interface IFactory {
function createPair(
address tokenA,
address tokenB
) external returns (address pair);
function getPair(
address tokenA,
address tokenB
) external view returns (address pair);
}
interface IRouter {
function factory() external pure returns (address);
function WETH() 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);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint amountA, uint amountB);
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;
}
contract Beaver is IERC20, Ownable {
using SafeMath for uint256;
address internal constant DEAD = 0x000000000000000000000000000000000000dEaD;
string private constant _name = "Beaver";
string private constant _symbol = "BEAVER";
uint8 private constant _decimals = 18;
uint256 private _totalSupply = 1000000000 * (10 ** _decimals);
uint256 private _maxTxAmountPercent = 200; // base 10000;
uint256 private _maxTransferPercent = 200;
uint256 private _maxWalletPercent = 200;
mapping(address => uint256) _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) public isFeeExempt;
IRouter router;
address public pair;
bool private tradingAllowed = false;
uint256 private marketingFee = 1800;
uint256 private developmentFee = 200;
uint256 private totalFee = 0;
uint256 private sellFee = 4000;
uint256 private transferFee = 1000;
uint256 private denominator = 10000;
bool private swapEnabled = true;
bool private swapping;
uint256 private swapThreshold = (_totalSupply * 10) / 100000;
uint256 private minTokenAmount = (_totalSupply * 10) / 100000;
modifier lockTheSwap() {
swapping = true;
_;
swapping = false;
}
address internal development_receiver;
address internal constant marketing_receiver =
0x21d008eb35166844119417256a74f4f32775F8Cb;
constructor() Ownable(msg.sender) {
IRouter _router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address _pair = IFactory(_router.factory()).createPair(
address(this),
_router.WETH()
);
router = _router;
pair = _pair;
totalFee = marketingFee + developmentFee;
development_receiver = msg.sender;
isFeeExempt[address(this)] = true;
isFeeExempt[marketing_receiver] = true;
isFeeExempt[msg.sender] = true;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
receive() external payable {}
function name() public pure returns (string memory) {
return _name;
}
function symbol() public pure returns (string memory) {
return _symbol;
}
function decimals() public pure returns (uint8) {
return _decimals;
}
function startTrading() external onlyOwner {
tradingAllowed = true;
}
function getOwner() external view override returns (address) {
return owner;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(
address owner,
address spender
) public view override returns (uint256) {
return _allowances[owner][spender];
}
function setisExempt(address _address, bool _enabled) external onlyOwner {
isFeeExempt[_address] = _enabled;
}
function approve(
address spender,
uint256 amount
) public override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(address(0)));
}
function _maxWalletToken() public view returns (uint256) {
return (totalSupply() * _maxWalletPercent) / denominator;
}
function _maxTxAmount() public view returns (uint256) {
return (totalSupply() * _maxTxAmountPercent) / denominator;
}
function _maxTransferAmount() public view returns (uint256) {
return (totalSupply() * _maxTransferPercent) / denominator;
}
function preTxCheck(
address sender,
address recipient,
uint256 amount
) internal view {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(
amount > uint256(0),
"Transfer amount must be greater than zero"
);
require(
amount <= balanceOf(sender),
"You are trying to transfer more than your balance"
);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) private {
preTxCheck(sender, recipient, amount);
checkTradingAllowed(sender, recipient);
checkMaxWallet(sender, recipient, amount);
checkTxLimit(sender, recipient, amount);
swapBack(sender, recipient);
_balances[sender] = _balances[sender].sub(amount);
uint256 amountReceived = shouldTakeFee(sender, recipient)
? takeFee(sender, recipient, amount)
: amount;
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
}
function setFees(
uint256 _marketing,
uint256 _development,
uint256 _extraSell,
uint256 _trans
) external onlyOwner {
marketingFee = _marketing;
developmentFee = _development;
totalFee = _marketing + _development;
sellFee = totalFee + _extraSell;
transferFee = _trans;
require(
totalFee <= denominator && sellFee <= denominator,
"totalFee and sellFee cannot be more than the denominator"
);
}
function setTxLimits(
uint256 _newMaxTx,
uint256 _newMaxTransfer,
uint256 _newMaxWallet
) external onlyOwner {
uint256 newTx = (totalSupply() * _newMaxTx) / 10000;
uint256 newTransfer = (totalSupply() * _newMaxTransfer) / 10000;
uint256 newWallet = (totalSupply() * _newMaxWallet) / 10000;
_maxTxAmountPercent = _newMaxTx;
_maxTransferPercent = _newMaxTransfer;
_maxWalletPercent = _newMaxWallet;
uint256 limit = totalSupply().mul(5).div(1000);
require(
newTx >= limit && newTransfer >= limit && newWallet >= limit,
"Max TXs and Max Wallet cannot be less than .5%"
);
}
function checkTradingAllowed(
address sender,
address recipient
) internal view {
if (!isFeeExempt[sender] && !isFeeExempt[recipient]) {
require(tradingAllowed, "tradingAllowed");
}
}
function checkMaxWallet(
address sender,
address recipient,
uint256 amount
) internal view {
if (
!isFeeExempt[sender] &&
!isFeeExempt[recipient] &&
recipient != address(pair) &&
recipient != address(DEAD)
) {
require(
(_balances[recipient].add(amount)) <= _maxWalletToken(),
"Exceeds maximum wallet amount."
);
}
}
function checkTxLimit(
address sender,
address recipient,
uint256 amount
) internal view {
if (sender != pair) {
require(
amount <= _maxTransferAmount() ||
isFeeExempt[sender] ||
isFeeExempt[recipient],
"TX Limit Exceeded"
);
}
require(
amount <= _maxTxAmount() ||
isFeeExempt[sender] ||
isFeeExempt[recipient],
"TX Limit Exceeded"
);
}
function swapAndLiquify() private lockTheSwap {
uint256 tokens = balanceOf(address(this));
uint256 _denominator = (
marketingFee.add(1).add(developmentFee)
).mul(2);
swapTokensForETH(tokens);
uint256 deltaBalance = address(this).balance;
uint256 unitBalance = deltaBalance.div(_denominator);
uint256 marketingAmt = unitBalance.mul(marketingFee);
if (marketingAmt > 0) {
payable(marketing_receiver).transfer(marketingAmt);
}
uint256 remainingBalance = address(this).balance;
if (remainingBalance > uint256(0)) {
payable(development_receiver).transfer(remainingBalance);
}
}
function swapTokensForETH(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
_approve(address(this), address(router), tokenAmount);
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function shouldSwapBack(
address sender,
address recipient
) internal view returns (bool) {
bool aboveThreshold = balanceOf(address(this)) >= swapThreshold;
return
!swapping &&
swapEnabled &&
tradingAllowed &&
!isFeeExempt[sender] &&
recipient == pair &&
aboveThreshold;
}
function setSwapbackSettings(
uint256 _swapThreshold,
uint256 _minTokenAmount
) external onlyOwner {
swapThreshold = _totalSupply.mul(_swapThreshold).div(uint256(100000));
minTokenAmount = _totalSupply.mul(_minTokenAmount).div(uint256(100000));
}
function swapBack(
address sender,
address recipient
) internal {
if (shouldSwapBack(sender, recipient)) {
swapAndLiquify();
}
}
function shouldTakeFee(
address sender,
address recipient
) internal view returns (bool) {
return !isFeeExempt[sender] && !isFeeExempt[recipient];
}
function getTotalFee(
address sender,
address recipient
) internal view returns (uint256) {
if (recipient == pair) {
return sellFee;
}
if (sender == pair) {
return totalFee;
}
return transferFee;
}
function takeFee(
address sender,
address recipient,
uint256 amount
) internal returns (uint256) {
if (getTotalFee(sender, recipient) > 0) {
uint256 feeAmount = amount.div(denominator).mul(
getTotalFee(sender, recipient)
);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);
}
return amount;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
msg.sender,
_allowances[sender][msg.sender].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
function _approve(address owner, address spender, uint256 amount) private {
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);
}
}