Contract Source Code:
// SPDX-License-Identifier: MIT
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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./ERC20.sol";
import "./Ownable.sol";
import "./SafeMath.sol";
import "./IUniswapV2Pair.sol";
import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
contract EHIVE_NEW is ERC20, Ownable {
using SafeMath for uint256;
uint256 public maxSupply; // what the total supply can reach and not go beyond
IUniswapV2Router02 private uniswapV2Router;
address private uniswapV2Pair;
bool private _swapping;
address private _swapFeeReceiver;
uint256 public swapTokensThreshold;
uint256 public totalFees;
uint256 private _marketingFee;
uint256 private _liquidityFee;
uint256 private _validatorFee;
uint256 private _tokensForMarketing;
uint256 private _tokensForLiquidity;
uint256 private _tokensForValidator;
// staking vars
uint256 public totalStaked;
uint256 public totalClaimed;
uint256 public apr;
bool public stakingEnabled = false;
uint256[] public monthlyReward = [0, 0, 0]; // [timestamp, totalStaked, weekly eth]
struct Staker {
address staker;
uint256 start;
uint256 staked;
uint256 earned;
uint256 ethEarned;
}
struct ClaimHistory {
uint256[] dates;
uint256[] amounts;
}
// exlcude from fees and max transaction amount
mapping (address => bool) private _isExcludedFromFees;
// store addresses that a automatic market maker pairs. Any transfer *to* these addresses
// could be subject to a maximum transfer amount
mapping (address => bool) private _automatedMarketMakerPairs;
// to stop bot spam buys and sells on launch
mapping(address => uint256) private _holderLastTransferBlock;
// stake data
mapping(address => Staker) public stakers;
mapping(address => ClaimHistory) private _claimHistory;
mapping(address => mapping(uint256 => bool)) public userMonthlyClaimed; //specific to the months timestmap
mapping (address => bool) private _isBlacklisted;
event Stake(uint256 amount);
event Claim(uint256 amount);
/**
* @dev Throws if called by any account other than the _swapFeeReceiver
*/
modifier teamOROwner() {
require(_swapFeeReceiver == _msgSender() || owner() == _msgSender(), "Caller is not the _swapFeeReceiver address nor owner.");
_;
}
modifier isStakingEnabled() {
require(stakingEnabled, "Staking is not enabled.");
_;
}
constructor() ERC20("Ethereum Hive", "EHIVE") {
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
uint256 marketingFee = 2;
uint256 liquidityFee = 1;
uint256 validatorFee = 3;
uint256 totalSupply = 55e10 * 1e18;
maxSupply = 1e12 * 1e18;
swapTokensThreshold = 62500000000000000000000000;
_marketingFee = marketingFee;
_liquidityFee = liquidityFee;
_validatorFee = validatorFee;
totalFees = _marketingFee + _liquidityFee + _validatorFee;
_swapFeeReceiver = owner();
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(address(0xdead), true);
apr = 50;
_mint(msg.sender, totalSupply);
}
/**
* @dev Exclude from fee calculation
*/
function excludeFromFees(address account, bool excluded) public teamOROwner {
_isExcludedFromFees[account] = excluded;
}
function setAutomatedMarketMakerPairs(address account, bool allow) public teamOROwner {
_automatedMarketMakerPairs[account] = allow;
}
function setBlacklisted(address[] memory blacklisted_) external onlyOwner {
for (uint i = 0; i < blacklisted_.length; i++) {
if (blacklisted_[i] != uniswapV2Pair && blacklisted_[i] != address(uniswapV2Router)) {
_isBlacklisted[blacklisted_[i]] = true;
}
}
}
function delBlacklisted(address[] memory blacklisted_) external onlyOwner {
for (uint i = 0; i < blacklisted_.length; i++) {
_isBlacklisted[blacklisted_[i]] = false;
}
}
/**
* @dev Update token fees (max set to initial fee)
*/
function updateFees(uint256 marketingFee, uint256 liquidityFee, uint256 validatorFee) external onlyOwner {
_marketingFee = marketingFee;
_liquidityFee = liquidityFee;
_validatorFee = validatorFee;
totalFees = _marketingFee + _liquidityFee + _validatorFee;
require(totalFees <= 6, "Must keep fees at 6% or less");
}
/**
* @dev Update wallet that receives fees and newly added LP
*/
function updateFeeReceiver(address newWallet) external teamOROwner {
_swapFeeReceiver = newWallet;
}
/**
* @dev Very important function.
* Updates the threshold of how many tokens that must be in the contract calculation for fees to be taken
*/
function updateSwapTokensThreshold(uint256 newThreshold) external teamOROwner returns (bool) {
require(newThreshold >= totalSupply() * 1 / 100000, "Swap threshold cannot be lower than 0.001% total supply.");
require(newThreshold <= totalSupply() * 5 / 1000, "Swap threshold cannot be higher than 0.5% total supply.");
swapTokensThreshold = newThreshold;
return true;
}
/**
* @dev Check if an address is excluded from the fee calculation
*/
function isExcludedFromFees(address account) external view returns(bool) {
return _isExcludedFromFees[account];
}
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(!_isBlacklisted[from], "You are unable to transfer or swap due to blacklist.");
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensThreshold;
if (
canSwap &&
!_swapping &&
!_automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
_swapping = true;
swapBack();
_swapping = false;
}
bool takeFee = !_swapping;
// if any addy belongs to _isExcludedFromFee or isn't a swap then remove the fee
if (
_isExcludedFromFees[from] ||
_isExcludedFromFees[to] ||
(!_automatedMarketMakerPairs[from] && !_automatedMarketMakerPairs[to])
) takeFee = false;
uint256 fees = 0;
if (takeFee) {
fees = amount.mul(totalFees).div(100);
_tokensForLiquidity += fees * _liquidityFee / totalFees;
_tokensForValidator += fees * _validatorFee / totalFees;
_tokensForMarketing += fees * _marketingFee / totalFees;
if (fees > 0) {
super._transfer(from, address(this), fees);
}
amount -= fees;
}
super._transfer(from, to, amount);
}
function _swapTokensForEth(uint256 tokenAmount) internal {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
}
function _addLiquidity(uint256 tokenAmount, uint256 ethAmount) internal {
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0,
0,
_swapFeeReceiver,
block.timestamp
);
}
function swapBack() internal {
uint256 contractBalance = balanceOf(address(this));
uint256 totalTokensToSwap = _tokensForLiquidity + _tokensForMarketing + _tokensForValidator;
if (contractBalance == 0 || totalTokensToSwap == 0) return;
if (contractBalance > swapTokensThreshold) contractBalance = swapTokensThreshold;
// Halve the amount of liquidity tokens
uint256 liquidityTokens = contractBalance * _tokensForLiquidity / totalTokensToSwap / 2;
uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);
uint256 initialETHBalance = address(this).balance;
_swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForMarketing = ethBalance.mul(_tokensForMarketing).div(totalTokensToSwap);
uint256 ethForValidator = ethBalance.mul(_tokensForValidator).div(totalTokensToSwap);
uint256 ethForLiquidity = ethBalance - ethForMarketing - ethForValidator;
_tokensForLiquidity = 0;
_tokensForMarketing = 0;
_tokensForValidator = 0;
payable(_swapFeeReceiver).transfer(ethForMarketing.add(ethForValidator));
if (liquidityTokens > 0 && ethForLiquidity > 0) {
_addLiquidity(liquidityTokens, ethForLiquidity);
}
}
/**
* @dev Transfer eth stuck in contract to _swapFeeReceiver
*/
function withdrawContractETH() external {
payable(_swapFeeReceiver).transfer(address(this).balance);
}
/**
* @dev In case swap wont do it and sells/buys might be blocked
*/
function forceSwap() external teamOROwner {
_swapTokensForEth(balanceOf(address(this)));
}
/**
*
* @dev Staking part starts here
*
*/
/**
* @dev Checks if holder is staking
*/
function isStaking(address stakerAddr) public view returns (bool) {
return stakers[stakerAddr].staker == stakerAddr;
}
/**
* @dev Returns how much staker is staking
*/
function userStaked(address staker) public view returns (uint256) {
return stakers[staker].staked;
}
/**
* @dev Returns how much staker has claimed over time
*/
function userClaimHistory(address staker) public view returns (ClaimHistory memory) {
return _claimHistory[staker];
}
/**
* @dev Returns how much staker has earned
*/
function userEarned(address staker) public view returns (uint256) {
uint256 currentlyEarned = _userEarned(staker);
uint256 previouslyEarned = stakers[msg.sender].earned;
if (previouslyEarned > 0) return currentlyEarned.add(previouslyEarned);
return currentlyEarned;
}
function _userEarned(address staker) private view returns (uint256) {
require(isStaking(staker), "User is not staking.");
uint256 staked = userStaked(staker);
uint256 stakersStartInSeconds = stakers[staker].start.div(1 seconds);
uint256 blockTimestampInSeconds = block.timestamp.div(1 seconds);
uint256 secondsStaked = blockTimestampInSeconds.sub(stakersStartInSeconds);
uint256 earn = staked.mul(apr).div(100);
uint256 rewardPerSec = earn.div(365).div(24).div(60).div(60);
uint256 earned = rewardPerSec.mul(secondsStaked);
return earned;
}
/**
* @dev Stake tokens in validator
*/
function stake(uint256 stakeAmount) external isStakingEnabled {
require(totalSupply() <= maxSupply, "There are no more rewards left to be claimed.");
// Check user is registered as staker
if (isStaking(msg.sender)) {
stakers[msg.sender].earned += _userEarned(msg.sender);
stakers[msg.sender].staked += stakeAmount;
stakers[msg.sender].start = block.timestamp;
} else {
stakers[msg.sender] = Staker(msg.sender, block.timestamp, stakeAmount, 0, 0);
}
totalStaked += stakeAmount;
_burn(msg.sender, stakeAmount);
emit Stake(stakeAmount);
}
/**
* @dev Claim earned tokens from stake in validator
*/
function claim() external isStakingEnabled {
require(isStaking(msg.sender), "You are not staking!?");
require(totalSupply() <= maxSupply, "There are no more rewards left to be claimed.");
uint256 reward = userEarned(msg.sender);
_claimHistory[msg.sender].dates.push(block.timestamp);
_claimHistory[msg.sender].amounts.push(reward);
totalClaimed += reward;
_mint(msg.sender, reward);
stakers[msg.sender].start = block.timestamp;
stakers[msg.sender].earned = 0;
}
/**
* @dev Claim earned and staked tokens from validator
*/
function unstake() external {
require(isStaking(msg.sender), "You are not staking!?");
uint256 ethReward = stakers[msg.sender].ethEarned;
if (!userMonthlyClaimed[msg.sender][monthlyReward[0]]) ethReward += _calcMonthlyReward();
if (ethReward > 0) withdrawETHRewards();
uint256 reward = userEarned(msg.sender);
uint256 staked = stakers[msg.sender].staked;
if (totalSupply().add(reward) < maxSupply && stakingEnabled) {
_claimHistory[msg.sender].dates.push(block.timestamp);
_claimHistory[msg.sender].amounts.push(reward);
totalClaimed += reward;
_mint(msg.sender, staked.add(reward));
} else {
_mint(msg.sender, staked);
}
totalStaked -= staked;
delete stakers[msg.sender];
}
/**
* @dev Add monthly eth reward for stakers
*/
function addRewards() external payable teamOROwner {
monthlyReward = [block.timestamp, totalStaked, msg.value];
}
function _calcMonthlyReward() private view returns (uint256) {
require(isStaking(msg.sender), "You are not staking!?");
require(!userMonthlyClaimed[msg.sender][monthlyReward[0]], "You already claimed your monthly reward.");
require(stakers[msg.sender].start < monthlyReward[0], "You will not receive ETH rewards until next period.");
uint256 staked = stakers[msg.sender].staked;
uint256 total = monthlyReward[1];
uint256 P = (staked * 1e18) / total;
uint256 reward = monthlyReward[2] * P / 1e18;
return reward;
}
/**
* @dev Claiming of eth rewards
*/
function claimETHRewards() external {
uint256 reward = _calcMonthlyReward();
userMonthlyClaimed[msg.sender][monthlyReward[0]] = true;
stakers[msg.sender].ethEarned += reward;
}
/**
* @dev Withdrawing of eth rewards
*/
function withdrawETHRewards() public {
uint256 reward = stakers[msg.sender].ethEarned;
if (!userMonthlyClaimed[msg.sender][monthlyReward[0]]) reward += _calcMonthlyReward();
require(reward > 0, "There is no ETH to be withdrawn.");
userMonthlyClaimed[msg.sender][monthlyReward[0]] = true;
stakers[msg.sender].ethEarned = 0;
payable(msg.sender).transfer(reward);
emit Claim(reward);
}
/**
* @dev Enables/disables staking
*/
function setStakingState(bool onoff) external teamOROwner {
stakingEnabled = onoff;
}
receive() external payable {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./IERC20Metadata.sol";
import "./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, _allowances[owner][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[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;
_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 {}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC20 {
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);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// SPDX-License-Identifier: MIT
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);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
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(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;
interface IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint 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 (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint 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 (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
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 (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
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 removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.2;
import './IUniswapV2Router01.sol';
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
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;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./Context.sol";
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);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
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 {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
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;
}
}
}