Contract Source Code:
/*
| |
# # ####### ####### ####### ####### ####### # ####### ####### #######
# # # # # # # # # # #
# # # # # # # # # # #
# ##### ##### # # ##### # ##### ##### #
# # # # # # # # # # #
# # # # # # # # # # #
# ####### ####### # ####### ####### ##### ####### ####### #
An experimental protocol that purges jeets on every button push.
WEBSITE: https://yeetzejeet.com
TELEGRAM: https://t.me/YeetZeJeet
TWITTER: https://twitter.com/YeetZeJeet
*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;
import "lib/openzeppelin-contracts/contracts/access/Ownable.sol";
import "lib/openzeppelin-contracts/contracts/security/ReentrancyGuard.sol";
import "lib/openzeppelin-contracts/contracts/interfaces/IERC20.sol";
import "interfaces/IUniswapV2Router02.sol";
import "interfaces/IUniswapV2Pair.sol";
import "interfaces/IUniswapV2Factory.sol";
contract Yeet is IERC20, Ownable, ReentrancyGuard {
string public name = "Yeet ze Jeet";
string public symbol = "YEET";
uint8 public decimals = 18;
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) public isExcludedFromTax;
bool public isTimeToYeet;
bool public isYeetReserve;
bool public tradingOpen;
uint256 public buyTax = 5;
uint256 public sellTax = 5;
uint256 public maxTaxSwap = 5_000e18;
uint256 public lastYeetTimestamp;
uint256 public lastYeetReserve;
uint256 public yeetCooldown;
IUniswapV2Pair public immutable uniswapV2Pair;
IUniswapV2Router02 public immutable uniswapV2Router;
address payable public immutable taxWallet;
constructor() {
totalSupply = 1_000_000e18;
balanceOf[msg.sender] = totalSupply;
uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Pair = IUniswapV2Pair(
IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH())
);
taxWallet = payable(0x9423Ffa556c9b538c8fd29C939Dc4335E1724836);
isYeetReserve = address(this) < uniswapV2Router.WETH();
yeetCooldown = 24 hours;
isExcludedFromTax[owner()] = true;
isExcludedFromTax[address(this)] = true;
isExcludedFromTax[taxWallet] = true;
isExcludedFromTax[0xF1A64C73e389404d43f1C4B9A37BC2d3517d782D] = true; // Presale addr
isExcludedFromTax[0x2c952eE289BbDB3aEbA329a4c41AE4C836bcc231] = true; // Wentokens addr
}
event Yeeted(uint256 prevYeetReserve, uint256 newYeetReserve, uint256 ethReserve, uint256 yeetBurned);
event FailedToYeet(uint256 prevYeetReserve, uint256 newYeetReserve);
event AddedLiquidity(uint256 yeetAmount, uint256 ethAmount);
bool inSwap = false;
modifier lockTheSwap() {
inSwap = true;
_;
inSwap = false;
}
receive() external payable {}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(), spender, amount);
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);
}
function _spendAllowance(address owner, address spender, uint256 amount) private {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
function transfer(address recipient, uint256 amount) external returns (bool) {
_transfer(_msgSender(), recipient, amount);
emit Transfer(msg.sender, recipient, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
_spendAllowance(sender, _msgSender(), amount);
_transfer(sender, recipient, amount);
emit Transfer(sender, recipient, amount);
return true;
}
function _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
if (!tradingOpen) {
require(isExcludedFromTax[from], "Can't trade yet");
}
uint256 taxAmount = 0;
if (isTimeToYeet && !isExcludedFromTax[from] && !isExcludedFromTax[to]) {
if (from == address(uniswapV2Pair) && to != address(uniswapV2Router)) {
taxAmount = (amount * buyTax) / 100;
}
if (to == address(uniswapV2Pair) && from != address(this)) {
taxAmount = (amount * sellTax) / 100;
}
if (taxAmount > 0) {
balanceOf[address(this)] += taxAmount;
emit Transfer(from, address(this), taxAmount);
}
uint256 contractTokenBalance = balanceOf[address(this)];
bool canSwap = contractTokenBalance > 0;
if (canSwap && !inSwap && to == address(uniswapV2Pair)) {
swapAndLiquify(min(amount, min(contractTokenBalance, maxTaxSwap)));
}
}
balanceOf[from] -= amount;
balanceOf[to] += amount - taxAmount;
}
function burnFrom(address account, uint256 amount) private {
address deadAddress = 0x000000000000000000000000000000000000dEaD;
balanceOf[account] -= amount;
balanceOf[deadAddress] += amount;
emit Transfer(account, deadAddress, amount);
}
function swapAndLiquify(uint256 tokenAmount) private lockTheSwap {
uint256 oneThird = tokenAmount / 3;
uint256 twoThirds = tokenAmount - oneThird;
uint256 initialBalance = address(this).balance;
swapTokensForEth(twoThirds);
uint256 newBalance = address(this).balance - initialBalance;
addLiquidity(oneThird, newBalance);
emit AddedLiquidity(oneThird, newBalance);
}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
uint256 ethBalBefore = address(this).balance;
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount, 0, path, address(this), block.timestamp
);
uint256 ethToOwner = address(this).balance - ((address(this).balance - ethBalBefore) / 3);
(bool success,) = taxWallet.call{value: ethToOwner}("");
require(success);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.addLiquidityETH{value: ethAmount}(address(this), tokenAmount, 0, 0, owner(), block.timestamp);
}
function manualSwap() external {
require(_msgSender() == taxWallet, "Not authorized");
uint256 tokenBalance = balanceOf[address(this)];
if (tokenBalance > 0) {
swapAndLiquify(tokenBalance);
}
}
/**
* This function burns jeet tokens from lp, pumping the price.
*/
function yeet() public nonReentrant {
require(isTimeToYeet, "Yeet machine broke");
require(lastYeetTimestamp + yeetCooldown <= block.timestamp, "Yeet cooldown not met");
// Get current liquidity pair reserves
(uint112 currentYeetReserve, ) = getReserves();
// Check if current reserve is higher since last yeet
// (meaning price is lower)
if (currentYeetReserve > lastYeetReserve) {
// Burn the difference from lp
uint256 toBurn = currentYeetReserve - lastYeetReserve;
burnFrom(address(uniswapV2Pair), toBurn);
uniswapV2Pair.sync();
(uint112 newYeetReserve, uint112 newEthReserve) = getReserves();
//Let them jeets know
emit Yeeted(currentYeetReserve, newYeetReserve, newEthReserve, toBurn);
} else {
emit FailedToYeet(currentYeetReserve, lastYeetReserve);
}
// Reset reserve and timestamp
(uint112 updatedYeetReserve,) = getReserves();
lastYeetReserve = updatedYeetReserve;
lastYeetTimestamp = block.timestamp;
}
/**
* This function always returns currentYeetReserve at first slot of the tuple,
* which is not always the case with calling pair for reserves
*/
function getReserves() public view returns (uint112, uint112) {
(uint112 reserve0, uint112 reserve1,) = uniswapV2Pair.getReserves();
uint112 yeetReserve = isYeetReserve ? reserve0 : reserve1;
uint112 ethReserve = !isYeetReserve ? reserve0 : reserve1;
return (yeetReserve, ethReserve);
}
/**
* To get usd price: divide current eth price by returned values
*/
function getPredictedPrice()
public
view
returns (uint256 _priceNow, uint256 _priceAfterYeet)
{
(uint112 currentYeetReserve, uint112 currentEthReserve) = getReserves();
uint256 priceNow = currentYeetReserve / currentEthReserve;
uint256 priceAfterYeet;
if (currentYeetReserve > lastYeetReserve) {
priceAfterYeet = lastYeetReserve / currentEthReserve;
} else {
priceAfterYeet = priceNow;
}
return (priceNow, priceAfterYeet);
}
/**
* Estimates burn amount from lp
*/
function estimateBurn()
public
view
returns (uint256)
{
(uint112 currentYeetReserve,) = getReserves();
uint256 toBurn;
if (currentYeetReserve > lastYeetReserve) {
toBurn = currentYeetReserve - lastYeetReserve;
}
return toBurn;
}
/**
* Set how much time shoud pass between yeets
*/
function setYeetCooldown(uint256 cooldown) public onlyOwner {
yeetCooldown = cooldown;
}
/**
* Start the protocol
*/
function timeToYeet(bool isIt) public onlyOwner {
isTimeToYeet = isIt;
}
/**
* Add liquidity and set initial price
*/
function addLiquidity(uint256 tokenAmount) public payable onlyOwner {
lastYeetReserve = tokenAmount;
lastYeetTimestamp = block.timestamp;
this.transferFrom(owner(), address(this), tokenAmount);
this.approve(address(uniswapV2Router), type(uint256).max);
uniswapV2Router.addLiquidityETH{value: msg.value}(address(this), tokenAmount, 0, 0, owner(), block.timestamp);
}
/**
* Open trading on Uniswap
*/
function openTrading() public payable onlyOwner {
tradingOpen = true;
}
function addExcludedFromTax(address toBeExcluded) public payable onlyOwner {
isExcludedFromTax[toBeExcluded] = true;
}
function removeExcludedFromTax(address toBeRemoved) public payable onlyOwner {
isExcludedFromTax[toBeRemoved] = false;
}
function min(uint256 a, uint256 b) public pure returns (uint256) {
return a < b ? a : b;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol)
pragma solidity ^0.8.0;
import "../token/ERC20/IERC20.sol";
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;
}
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;
}
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
// 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
// OpenZeppelin Contracts (last updated v4.6.0) (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);
}
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);
}