Contract Source Code:
File 1 of 1 : CroakToken
// SPDX-License-Identifier: MIT
pragma solidity 0.8.20;
pragma experimental ABIEncoderV2;
// 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;
}
}
// 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. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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);
}
}
// 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);
}
// 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);
}
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)
// pragma solidity ^0.8.0;
// import "./IERC20.sol";
// import "./extensions/IERC20Metadata.sol";
// import "../../utils/Context.sol";
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
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;
/**
* @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 view virtual override returns (uint8) {
return 18;
}
/**
* @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");
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;
// 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);
_afterTokenTransfer(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");
_beforeTokenTransfer(address(0), account, amount);
_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);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `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");
_beforeTokenTransfer(account, address(0), amount);
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);
_afterTokenTransfer(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);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)
// pragma solidity ^0.8.0;
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
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);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
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);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b)
internal
pure
returns (bool, uint256)
{
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// pragma solidity >=0.5.0;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address uniswapV2Pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address uniswapV2Pair);
function allPairs(uint256) external view returns (address uniswapV2Pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address uniswapV2Pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// 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,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
// pragma solidity >=0.6.2;
// import './IUniswapV2Router01.sol';
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
library Address {
function sendValue(address payable recipient, uint256 amount)
internal
returns (bool)
{
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
return success;
}
}
contract CroakToken is ERC20, Ownable {
using Address for address payable;
IUniswapV2Router02 public uniswapV2Router02;
address public uniswapV2Pair;
bool private swapping;
bool public swapEnabled = true;
bool public tradingEnabled;
uint256 public startTradingBlock;
address public constant DEAD = 0x000000000000000000000000000000000000dEaD;
address public constant PEPE = 0x6982508145454Ce325dDbE47a25d4ec3d2311933;
address public marketingWallet = 0xDfE70519047CFD730DAA1E792e5B233738c9baa3;
address public PEPEBurnAddress = 0x000000000000000000000000000000000000dEaD;
uint8 private constant _decimals = 18;
uint256 public constant _tTotal = 420690000000000 * 10**_decimals;
uint256 public swapTokensAtAmount = ((_tTotal * 2) / 1e3);
uint256 public maxWalletBalance = (_tTotal / 1e2);
uint256 public maxBuyAmount = (_tTotal / 1e2);
uint256 public maxSellAmount = (_tTotal / 1e2);
uint256 public pepeBurned;
///////////////
// Fees //
///////////////
struct Taxes {
uint256 marketing;
uint256 liquidity;
uint256 burn;
uint256 pepeburn;
}
Taxes public buyTaxes = Taxes(14, 0, 0, 1);
Taxes public sellTaxes = Taxes(23, 0, 0, 1);
////////////////
// Anti Bot //
////////////////
mapping(address => bool) public _isBot;
mapping(address => uint256) public lastSell;
uint256 private antiBotBlocks = 1;
uint256 public coolDownTime = 0;
uint256 private launchtax = 49;
uint256 public coolDownBalance = _tTotal;
mapping(address => bool) private _isExcludedFromFees;
mapping(address => bool) public automatedMarketMakerPairs;
///////////////
// Events //
///////////////
event ExcludeFromFees(address indexed account, bool isExcluded);
event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded);
event SetAutomatedMarketMakerPair(
address indexed uniswapV2Pair,
bool indexed value
);
event BuyAndBurnPEPE(uint256 pepeburn);
constructor() ERC20("Croak", "CROAK") {
IUniswapV2Router02 _uniswapV2Router02 = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
// Create a uniswapV2Pair for this new token
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router02.factory())
.createPair(address(this), _uniswapV2Router02.WETH());
uniswapV2Router02 = _uniswapV2Router02;
uniswapV2Pair = _uniswapV2Pair;
_setAutomatedMarketMakerPair(_uniswapV2Pair, true);
// exclude from paying fees or having max transaction amount
excludeFromFees(owner(), true);
excludeFromFees(address(this), true);
excludeFromFees(DEAD, true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(owner(), _tTotal);
}
receive() external payable {}
/// @notice Withdraw tokens sent by mistake.
/// @param tokenAddress The address of the token to withdraw
function rescueERC20Tokens(address tokenAddress) external onlyOwner {
IERC20(tokenAddress).transfer(
msg.sender,
IERC20(tokenAddress).balanceOf(address(this))
);
}
function forceSend() external {
uint256 ETHbalance = address(this).balance;
payable(owner()).sendValue(ETHbalance);
}
function updateRouter(address newRouter) external onlyOwner {
uniswapV2Router02 = IUniswapV2Router02(newRouter);
}
/////////////////////////////////
// Exclude / Include functions //
/////////////////////////////////
function excludeFromFees(address account, bool excluded) public onlyOwner {
require(
_isExcludedFromFees[account] != excluded,
"PEPEburn: Account is already the value of 'excluded'"
);
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function excludeMultipleAccountsFromFees(
address[] calldata accounts,
bool excluded
) public onlyOwner {
for (uint256 i = 0; i < accounts.length; i++) {
_isExcludedFromFees[accounts[i]] = excluded;
}
emit ExcludeMultipleAccountsFromFees(accounts, excluded);
}
///////////////////////
// Setter Functions //
///////////////////////
function setMarketingWallet(address newWallet) external onlyOwner {
marketingWallet = newWallet;
}
/// @notice Update the threshold to swap tokens
function setSwapTokensAtAmount(uint256 amount) external onlyOwner {
swapTokensAtAmount = amount * 10**9;
}
function setBuyTaxes(
uint256 _marketing,
uint256 _liquidity,
uint256 _burn,
uint256 _pepeburn
) external onlyOwner {
require(
(_marketing + _liquidity + _burn + _pepeburn) <= 25,
"Must keep fees at 25% or less"
);
buyTaxes = Taxes(_marketing, _liquidity, _burn, _pepeburn);
}
function setSellTaxes(
uint256 _marketing,
uint256 _liquidity,
uint256 _burn,
uint256 _pepeburn
) external onlyOwner {
require(
(_marketing + _liquidity + _burn + _pepeburn) <= 50,
"Must keep fees at 50% or less"
);
sellTaxes = Taxes(_marketing, _liquidity, _burn, _pepeburn);
}
function setMaxBuyLimits(uint256 maxBuy) external onlyOwner {
require(maxBuy >= 1e7, "Cannot set max buy amount lower than 0.1%");
maxBuyAmount = maxBuy * 10**decimals();
}
function setMaxSellLimits(uint256 maxSell) external onlyOwner {
require(maxSell >= 1e7, "Cannot set max sell amount lower than 0.1%");
maxSellAmount = maxSell * 10**decimals();
}
function setMaxWallet(uint256 maxWallet) external onlyOwner {
require(
maxWallet >= 1e7,
"Cannot set max wallet amount lower than 0.1%"
);
maxWalletBalance = maxWallet * 10**9;
}
function SetMaxTxLimit(
uint256 maxBuy,
uint256 maxSell,
uint256 maxWallet
) external onlyOwner {
require(maxBuy >= 1e7, "Cannot set max buy amount lower than 0.1%");
require(maxSell >= 1e7, "Cannot set max sell amount lower than 0.1%");
require(
maxWallet >= 1e7,
"Cannot set max wallet amount lower than 0.1%"
);
maxBuyAmount = maxBuy * 10**decimals();
maxSellAmount = maxSell * 10**decimals();
maxWalletBalance = maxWallet * 10**9;
}
/// @notice Enable or disable internal swaps
/// @dev Set "true" to enable internal swaps
function setSwapEnabled(bool _enabled) external onlyOwner {
swapEnabled = _enabled;
}
function setCooldownTime(uint256 timeInSeconds, uint256 balance)
external
onlyOwner
{
coolDownTime = timeInSeconds;
coolDownBalance = balance * 10**decimals();
require(timeInSeconds <= 60, "cooldown timer cannot exceed 1 minutes");
}
function enableTrading() external onlyOwner {
require(!tradingEnabled, "Trading is already enabled");
tradingEnabled = true;
startTradingBlock = block.number;
}
function setAntiBotBlocks(uint256 numberOfBlocks) external onlyOwner {
require(!tradingEnabled, "Can't change when trading has started");
antiBotBlocks = numberOfBlocks;
}
/// @param bot The bot address
/// @param value "true" to blacklist, "false" to unblacklist
function setBot(address bot, bool value) external onlyOwner {
require(_isBot[bot] != value);
_isBot[bot] = value;
}
function setBulkBot(address[] memory bots, bool value) external onlyOwner {
for (uint256 i; i < bots.length; i++) {
_isBot[bots[i]] = value;
}
}
/// @dev Set new pairs created due to listing in new DEX
function setAutomatedMarketMakerPair(address newPair, bool value)
external
onlyOwner
{
_setAutomatedMarketMakerPair(newPair, value);
}
function _setAutomatedMarketMakerPair(address newPair, bool value) private {
require(
automatedMarketMakerPairs[newPair] != value,
"PEPEburn: Automated market maker uniswapV2Pair is already set to that value"
);
automatedMarketMakerPairs[newPair] = value;
emit SetAutomatedMarketMakerPair(newPair, value);
}
//////////////////////
// Getter Functions //
//////////////////////
function isExcludedFromFees(address account) public view returns (bool) {
return _isExcludedFromFees[account];
}
////////////////////////
// Transfer Functions //
////////////////////////
function airdropTokens(address[] memory accounts, uint256[] memory amounts)
external
onlyOwner
{
require(
accounts.length == amounts.length,
"Arrays must have same size"
);
for (uint256 i; i < accounts.length; i++) {
super._transfer(msg.sender, accounts[i], amounts[i]);
}
}
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(
!_isBot[from] && !_isBot[to],
"C:\\<windows95\\system32> kill bot"
);
if (!_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
require(tradingEnabled, "Trading no active");
if (!automatedMarketMakerPairs[to]) {
require(
balanceOf(to) + (amount) <= maxWalletBalance,
"Balance is exceeding maxWalletBalance"
);
}
if (
!automatedMarketMakerPairs[from] &&
balanceOf(from) >= coolDownBalance
) {
uint256 timePassed = block.timestamp - lastSell[from];
require(
timePassed > coolDownTime,
"Cooldown is active. Please wait"
);
lastSell[from] = block.timestamp;
}
if (automatedMarketMakerPairs[from]) {
require(
amount <= maxBuyAmount,
"You are exceeding maxBuyAmount"
);
}
if (!automatedMarketMakerPairs[from]) {
require(
amount <= maxSellAmount,
"You are exceeding maxSellAmount"
);
}
}
if (amount == 0) {
super._transfer(from, to, 0);
return;
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
uint256 swapTax = sellTaxes.marketing +
sellTaxes.liquidity +
sellTaxes.pepeburn;
if (
canSwap &&
!swapping &&
swapEnabled &&
!automatedMarketMakerPairs[from] &&
!_isExcludedFromFees[from] &&
!_isExcludedFromFees[to]
) {
swapping = true;
if (swapTax > 0) {
swapAndLiquify(swapTokensAtAmount, swapTax);
}
swapping = false;
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
}
if (takeFee) {
bool beforeTradingFee = block.number <=
startTradingBlock + antiBotBlocks;
uint256 swapAmt;
uint256 burnAmt;
if (automatedMarketMakerPairs[to] && !beforeTradingFee) {
swapAmt = (amount * swapTax) / 100;
burnAmt = (amount * sellTaxes.burn) / 100;
} else if (automatedMarketMakerPairs[from] && !beforeTradingFee) {
swapAmt =
(amount *
(buyTaxes.marketing +
buyTaxes.liquidity +
buyTaxes.pepeburn)) /
100;
burnAmt = (amount * buyTaxes.burn) / 100;
} else if (beforeTradingFee) {
swapAmt = (amount * launchtax) / 100;
}
amount = amount - (swapAmt + burnAmt);
super._transfer(from, address(this), swapAmt);
if (burnAmt > 0) {
super._transfer(from, DEAD, burnAmt);
}
}
super._transfer(from, to, amount);
}
function swapAndLiquify(uint256 tokens, uint256 swapTax) private {
// Split the contract balance into halves
uint256 denominator = swapTax * 2;
uint256 tokensToAddLiquidityWith = (tokens * sellTaxes.liquidity) /
denominator;
uint256 toSwap = tokens - tokensToAddLiquidityWith;
uint256 initialBalance = address(this).balance;
swapTokensForETH(toSwap);
uint256 deltaBalance = address(this).balance - initialBalance;
uint256 unitBalance = deltaBalance /
(denominator - sellTaxes.liquidity);
uint256 ethToAddLiquidityWith = unitBalance * sellTaxes.liquidity;
if (ethToAddLiquidityWith > 0) {
// Add liquidity to pancake
addLiquidity(tokensToAddLiquidityWith, ethToAddLiquidityWith);
}
// Send ETH to marketingWallet
uint256 marketingWalletAmt = unitBalance * 2 * sellTaxes.marketing;
if (marketingWalletAmt > 0) {
payable(marketingWallet).sendValue(marketingWalletAmt);
}
uint256 pepeburnAmt = unitBalance * 2 * sellTaxes.pepeburn;
if (pepeburnAmt > 0) {
swapAndBurnPEPE(pepeburnAmt);
}
}
function swapAndBurnPEPE(uint256 ethAmount) private {
address[] memory path = new address[](2);
path[0] = uniswapV2Router02.WETH();
path[1] = PEPE;
uint256 balBefore = IERC20(PEPE).balanceOf(PEPEBurnAddress);
uniswapV2Router02.swapExactETHForTokensSupportingFeeOnTransferTokens{
value: ethAmount
}(
0, // accept any amount of Tokens
path,
PEPEBurnAddress, // Burn address
block.timestamp
);
uint256 burned = IERC20(PEPE).balanceOf(PEPEBurnAddress) - balBefore;
pepeBurned += burned;
emit BuyAndBurnPEPE(burned);
}
function swapTokensForETH(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router02.WETH();
_approve(address(this), address(uniswapV2Router02), tokenAmount);
// make the swap
uniswapV2Router02.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
address(this),
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router02), tokenAmount);
// add the liquidity
uniswapV2Router02.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
}