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- Contract name:
- MasterChef
- Optimization enabled
- false
- Compiler version
- v0.6.12+commit.27d51765
- EVM Version
- default
- Verified at
- 2021-11-05T00:39:56.756066Z
Constructor Arguments
00000000000000000000000066fc6b9046102831595de0e816e1a7781f199f6c000000000000000000000000000000000000000000000000002386f26fc1000000000000000000000000000000000000000000000000000000000000000a2990
Arg [0] (address) : 0x66fc6b9046102831595de0e816e1a7781f199f6c
Arg [1] (uint256) : 10000000000000000
Arg [2] (uint256) : 666000
Contract source code
// SPDX-License-Identifier: UNLICENSED /** * @title SafeBEP20 * @dev Wrappers around BEP20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeBEP20 for IBEP20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeBEP20 { using SafeMath for uint256; using Address for address; function safeTransfer(IBEP20 token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom(IBEP20 token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IBEP20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IBEP20 token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require((value == 0) || (token.allowance(address(this), spender) == 0), "SafeBEP20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance(IBEP20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance(IBEP20 token, address spender, uint256 value) internal { uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeBEP20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IBEP20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeBEP20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeBEP20: BEP20 operation did not succeed"); } } } pragma solidity 0.6.12; // /* * @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 GSN 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 payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } } // /** * @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 () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { 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 { emit OwnershipTransferred(_owner, address(0)); _owner = 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"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // interface IBEP20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the token decimals. */ function decimals() external view returns (uint8); /** * @dev Returns the token symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the token name. */ function name() external view returns (string memory); /** * @dev Returns the bep token owner. */ function getOwner() external view returns (address); /** * @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 `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, uint256 amount ) external returns (bool); /** * @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 Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ 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) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { 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) { // 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) { 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) { 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) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @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) { require(b <= a, "SafeMath: subtraction overflow"); 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) { if (a == 0) return 0; uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @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. 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) internal pure returns (uint256) { require(b > 0, "SafeMath: division by zero"); 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) { require(b > 0, "SafeMath: modulo by zero"); 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) { 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. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * 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) { 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) { require(b > 0, errorMessage); return a % b; } } // /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } } // /** * @dev Implementation of the {IBEP20} 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 {BEP20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-BEP20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of BEP20 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 {IBEP20-approve}. */ contract BEP20 is Context, IBEP20, Ownable { using SafeMath for uint256; using Address for address; mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor(string memory name, string memory symbol) public { _name = name; _symbol = symbol; _decimals = 18; } /** * @dev Returns the bep token owner. */ function getOwner() external override view returns (address) { return owner(); } /** * @dev Returns the token name. */ function name() public override view returns (string memory) { return _name; } /** * @dev Returns the token decimals. */ function decimals() public override view returns (uint8) { return _decimals; } /** * @dev Returns the token symbol. */ function symbol() public override view returns (string memory) { return _symbol; } /** * @dev See {BEP20-totalSupply}. */ function totalSupply() public override view returns (uint256) { return _totalSupply; } /** * @dev See {BEP20-balanceOf}. */ function balanceOf(address account) public override view returns (uint256) { return _balances[account]; } /** * @dev See {BEP20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {BEP20-allowance}. */ function allowance(address owner, address spender) public override view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {BEP20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {BEP20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {BEP20}; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "BEP20: transfer amount exceeds allowance") ); 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 {BEP20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(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 {BEP20-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 returns (bool) { _approve( _msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "BEP20: decreased allowance below zero") ); return true; } /** * @dev Creates `amount` tokens and assigns them to `msg.sender`, increasing * the total supply. * * Requirements * * - `msg.sender` must be the token owner */ function mint(uint256 amount) public onlyOwner returns (bool) { _mint(_msgSender(), amount); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is 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: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "BEP20: transfer from the zero address"); require(recipient != address(0), "BEP20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "BEP20: transfer amount exceeds balance"); _balances[recipient] = _balances[recipient].add(amount); emit Transfer(sender, recipient, 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 * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal { require(account != address(0), "BEP20: mint to the zero address"); _totalSupply = _totalSupply.add(amount); _balances[account] = _balances[account].add(amount); emit Transfer(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 { require(account != address(0), "BEP20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "BEP20: burn amount exceeds balance"); _totalSupply = _totalSupply.sub(amount); emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is 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 { require(owner != address(0), "BEP20: approve from the zero address"); require(spender != address(0), "BEP20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Destroys `amount` tokens from `account`.`amount` is then deducted * from the caller's allowance. * * See {_burn} and {_approve}. */ function _burnFrom(address account, uint256 amount) internal { _burn(account, amount); _approve( account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "BEP20: burn amount exceeds allowance") ); } } 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); } 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; } 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; } 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; } /** * @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 pershieldtage 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 () internal { _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 make it call a * `private` function that does the actual work. */ modifier nonReentrant() { // On the first call to nonReentrant, _notEntered will be true require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; _; // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } } // JungleSwap Token. contract JungleSwap is BEP20 { // Transfer tax rate in basis points. (default 4.5%) uint16 public transferTaxRate = 400; // Burn Fee, in percent of transferTaxRate. uint16 public burnFee = 20; // Liq Fee, in percent of transferTaxRate. uint16 public liqFee = 100 - burnFee; // Max transfer tax rate: 10%. uint16 public constant maxTaxRate = 1000; // Fee address address payable public feeAddr = 0x45472B519de9Ac90A09BF51d9E161B8C6476361D; // Burn address address public constant brunAddr = 0x000000000000000000000000000000000000dEaD; // Contract address is excluded from tax, when receiving. address public noTaxRecipientAddr = 0x000000000000000000000000000000000000dEaD; // Contract address is excluded from tax, when sending. address public noTaxSenderAddr = 0x000000000000000000000000000000000000dEaD; // Contract address is excluded from tax, when sending ad receiving. address public noTaxContr = 0x000000000000000000000000000000000000dEaD; // Max transfer amount rate in basis points. (default is 2.5% of total supply) uint16 public maxTransferAmountRate = 250; // Addresses that excluded from antiWhale mapping(address => bool) private _excludedFromAntiWhale; // Automatic swap and liquify enabled bool public swapAndLiquifyEnabled = false; // Min amount to liquify. (default 10 JUNGLEs) uint256 public minAmountToLiquify = 10 ether; // The swap router, modifiable. IUniswapV2Router02 public swapRouter; // The trading pair address public swapPair; // In swap and liquify bool private _inSwapAndLiquify; // The operator can call all functions except of minting JUNGLE address private _operator; // The lpEarner address will be set to an Earning Contract which // will distribute JUNGLE-WVLX LP token to JUNGLE Stakers! address private lpEarner; // Events event OperatorTransferred(address indexed previousOperator, address indexed newOperator); event TransferTaxRateUpdated(address indexed operator, uint256 previousRate, uint256 newRate); event BurnFeeUpdated(address indexed operator, uint256 previousRate, uint256 newRate); event LiqFeeUpdated(address indexed operator, uint256 previousRate, uint256 newRate); event MaxTransferAmountRateUpdated(address indexed operator, uint256 previousRate, uint256 newRate); event SwapAndLiquifyEnabledUpdated(address indexed operator, bool enabled); event MinAmountToLiquifyUpdated(address indexed operator, uint256 previousAmount, uint256 newAmount); event SwapRouterUpdated(address indexed operator, address indexed router, address indexed pair); event SetNoTaxSenderAddr(address indexed operator, address indexed noTaxSenderAddr); event SetNoTaxRecipientAddr(address indexed operator, address indexed noTaxRecipientAddr); event SetNoTaxContr(address indexed operator, address indexed noTaxAddr); event SetLpEarnerAddr(address indexed operator, address indexed SetLpEarnerAddr); event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiqudity); modifier onlyOperator() { require(_operator == msg.sender, "operator: caller is not the operator"); _; } modifier antiWhale(address sender, address recipient, uint256 amount) { if (maxTransferAmount() > 0) { if ( _excludedFromAntiWhale[sender] == false && _excludedFromAntiWhale[recipient] == false ) { require(amount <= maxTransferAmount(), "JUNGLE::antiWhale: Transfer amount exceeds the maxTransferAmount"); } } _; } modifier lockTheSwap { _inSwapAndLiquify = true; _; _inSwapAndLiquify = false; } modifier transferTaxFree { uint16 _transferTaxRate = transferTaxRate; transferTaxRate = 0; _; transferTaxRate = _transferTaxRate; } /** * @notice Constructs the JungleSwapToken contract. */ constructor() public BEP20("Jungle VLX.JungleSwap.cash", "JUNGLE") { _operator = _msgSender(); lpEarner = _msgSender(); emit OperatorTransferred(address(0), _operator); _excludedFromAntiWhale[msg.sender] = true; _excludedFromAntiWhale[address(0)] = true; _excludedFromAntiWhale[address(this)] = true; _excludedFromAntiWhale[brunAddr] = true; } /// @notice Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef). function mint(address _to, uint256 _amount) public onlyOwner { _mint(_to, _amount); } /// @dev overrides transfer function to meet tokenomics of JUNGLE function _transfer(address sender, address recipient, uint256 amount) internal virtual override antiWhale(sender, recipient, amount) { // swap and liquify if ( swapAndLiquifyEnabled == true && _inSwapAndLiquify == false && address(swapRouter) != address(0) && swapPair != address(0) && sender != swapPair // excludes Buying in BNB Liquidity && sender != owner() // excludes owner (later MasterChef) ) { swapAndLiquify(); } if (recipient == brunAddr || sender == _operator || sender == noTaxSenderAddr || recipient == noTaxRecipientAddr || sender == noTaxContr || recipient == noTaxContr || transferTaxRate == 0 ) { super._transfer(sender, recipient, amount); // transfer with no Tax } else { // default tax is 4% of every transfer uint256 taxAmount = amount.mul(transferTaxRate).div(10000); uint256 burnAmount = taxAmount.mul(burnFee).div(100); uint256 liqAmount = taxAmount.sub(burnAmount); require(taxAmount >= burnAmount + liqAmount - 100, "JUNGLE::transfer: Burn value invalid"); // default 96% of transfer sent to recipient uint256 sendAmount = amount.sub(taxAmount); require(amount >= sendAmount + taxAmount -100 , "JUNGLE::transfer: Tax value invalid"); super._transfer(sender, brunAddr, burnAmount); super._transfer(sender, address(this), liqAmount); super._transfer(sender, recipient, sendAmount); amount = sendAmount; } } /// @dev Swap and liquify function swapAndLiquify() private lockTheSwap transferTaxFree { uint256 contractTokenBalance = balanceOf(address(this)); uint256 maxTransferAmount = maxTransferAmount(); contractTokenBalance = contractTokenBalance > maxTransferAmount ? maxTransferAmount : contractTokenBalance; if (contractTokenBalance >= minAmountToLiquify) { // only min amount to liquify uint256 liquifyAmount = minAmountToLiquify; // split the liquify amount into halves uint256 half = liquifyAmount.div(2); uint256 otherHalf = liquifyAmount.sub(half.mul(85).div(100)); // swap tokens for ETH swapTokensForEth(half); // send 15% ETH to the Fee Wallet feeAddr.transfer(address(this).balance.mul(15).div(100)); // how much ETH is in the token contract uint256 newBalance = address(this).balance; // add liquidity addLiquidity(otherHalf, newBalance); emit SwapAndLiquify(half, newBalance, otherHalf); } } /// @dev Swap tokens for eth function swapTokensForEth(uint256 tokenAmount) private { // generate the JUNGLE -> wVELAS path for swapping address[] memory path = new address[](2); path[0] = address(this); path[1] = swapRouter.WETH(); _approve(address(this), address(swapRouter), tokenAmount); // make the swap swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens( tokenAmount, 0, // accept any amount of ETH path, address(this), block.timestamp ); } /// @dev Add liquidity function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private { // approve token transfer to cover all possible scenarios _approve(address(this), address(swapRouter), tokenAmount); // add the liquidity swapRouter.addLiquidityETH{value: ethAmount}( address(this), tokenAmount, 0, // slippage is unavoidable 0, // slippage is unavoidable viewLpEarner(), block.timestamp ); } /** * @dev Returns the max transfer amount. */ function maxTransferAmount() public view returns (uint256) { return totalSupply().mul(maxTransferAmountRate).div(10000); } /** * @dev Returns the address is excluded from antiWhale or not. */ function isExcludedFromAntiWhale(address _account) public view returns (bool) { return _excludedFromAntiWhale[_account]; } // To receive BNB from swapRouter when swapping receive() external payable {} /** * @dev Update the transfer tax rate. * Can only be called by the current operator. */ function updateTransferTaxRate(uint16 _transferTaxRate) public onlyOperator { require(_transferTaxRate <= maxTaxRate, "JUNGLE::updateTransferTaxRate: Transfer tax rate must not exceed the maximum rate."); emit TransferTaxRateUpdated(msg.sender, transferTaxRate, _transferTaxRate); transferTaxRate = _transferTaxRate; } /** * @dev Update the Burn Fee. * Can only be called by the current operator. */ function updateBurnFee(uint16 _burnFee) public onlyOperator { require(_burnFee <= 100, "JUNGLE::updateBurnRate: Burn Fee must not exceed the maximum rate."); emit BurnFeeUpdated(msg.sender, burnFee, _burnFee); burnFee = _burnFee; } /** * @dev Update the max transfer amount rate. * Can only be called by the current operator. */ function updateMaxTransferAmountRate(uint16 _maxTransferAmountRate) public onlyOperator { require(_maxTransferAmountRate <= 1000, "JUNGLE::updateMaxTransferAmountRate: Max transfer amount to High."); require(_maxTransferAmountRate >= 100, "JUNGLE::updateMaxTransferAmountRate: Min transfer amount to Low."); emit MaxTransferAmountRateUpdated(msg.sender, maxTransferAmountRate, _maxTransferAmountRate); maxTransferAmountRate = _maxTransferAmountRate; } /** * @dev Update the min amount to liquify. * Can only be called by the current operator. */ function updateMinAmountToLiquify(uint256 _minAmount) public onlyOperator { emit MinAmountToLiquifyUpdated(msg.sender, minAmountToLiquify, _minAmount); minAmountToLiquify = _minAmount; } /** * @dev Exclude or include an address from antiWhale. * Can only be called by the current operator. */ function setExcludedFromAntiWhale(address _account, bool _excluded) public onlyOperator { _excludedFromAntiWhale[_account] = _excluded; } /** * @dev Update the swapAndLiquifyEnabled. * Can only be called by the current operator. */ function updateSwapAndLiquifyEnabled(bool _enabled) public onlyOperator { emit SwapAndLiquifyEnabledUpdated(msg.sender, _enabled); swapAndLiquifyEnabled = _enabled; } /** * @dev Update the swap router. * Can only be called by the current operator. */ function updateSwapRouter(address _router) public onlyOperator { swapRouter = IUniswapV2Router02(_router); swapPair = IUniswapV2Factory(swapRouter.factory()).getPair(address(this), swapRouter.WETH()); require(swapPair != address(0), "JUNGLE::updateSwapRouter: Invalid pair address."); emit SwapRouterUpdated(msg.sender, address(swapRouter), swapPair); } /** * @dev Update the no Tax Sender Address. * Can only be called by the current operator. */ function setNoTaxSenderAddr(address _noTaxSenderAddr) public onlyOperator { noTaxSenderAddr = _noTaxSenderAddr; emit SetNoTaxSenderAddr(msg.sender, _noTaxSenderAddr); } /** * @dev Update the no Tax Receipient Address. * Can only be called by the current operator. */ function setNoTaxRecipientAddr(address _noTaxRecipientAddr) public onlyOperator { noTaxRecipientAddr = _noTaxRecipientAddr; emit SetNoTaxRecipientAddr(msg.sender, _noTaxRecipientAddr); } /** * @dev Update the no Tax Receipient Address. * Can only be called by the current operator. */ function setNoTaxContr(address _noTaxContr) public onlyOperator { noTaxContr = _noTaxContr; emit SetNoTaxContr(msg.sender, _noTaxContr); } /** * @dev Returns the address of the current operator. */ function operator() public view returns (address) { return _operator; } /** * @dev Returns the address of the current operator. */ function viewLpEarner() public view returns (address) { return lpEarner; } /** * @dev Update the no lpEarner address. * Can only be called by the current operator. */ function setLpEarnerAddr(address _lpEarner) public onlyOperator { lpEarner = _lpEarner; emit SetLpEarnerAddr(msg.sender, _lpEarner); } // Pay out any token from Token Contract function payoutToken(address _token, uint256 _amount) public onlyOperator { BEP20(_token).transfer(msg.sender, _amount); } /** * @dev Transfers operator of the contract to a new account (`newOperator`). * Can only be called by the current operator. */ function transferOperator(address newOperator) public onlyOperator { require(newOperator != address(0), "JUNGLE::transferOperator: new operator is the zero address"); emit OperatorTransferred(_operator, newOperator); _operator = newOperator; } } /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20 { using SafeMath for uint256; using Address for address; function safeTransfer( IBEP20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IBEP20 token, address from, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove( IBEP20 token, address spender, uint256 value ) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' // solhint-disable-next-line max-line-length require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } function safeIncreaseAllowance( IBEP20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender).add(value); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } function safeDecreaseAllowance( IBEP20 token, address spender, uint256 value ) internal { uint256 newAllowance = token.allowance(address(this), spender).sub( value, "SafeERC20: decreased allowance below zero" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance)); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IBEP20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional // solhint-disable-next-line max-line-length require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } } // MasterChef is the master of Reward Token. He can make Reward Token and he is a fair guy. // // Note that it's ownable and the owner wields tremendous power. The ownership // will be transferred to a governance smart contract once Token is sufficiently // distributed and the community can show to govern itself. // // Have fun reading it. Hopefully it's bug-free. God bless. contract MasterChef is Ownable, ReentrancyGuard { using SafeMath for uint256; using SafeERC20 for IBEP20; // Info of each user. struct UserInfo { uint256 amount; // How many LP tokens the user has provided. uint256 rewardDebt; // Reward debt. See explanation below. // // We do some fancy math here. Basically, any point in time, the amount of Token // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accTokenPerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accTokenPerShare` (and `lastRewardBlock`) gets updated. // 2. User receives the pending reward sent to his/her address. // 3. User's `amount` gets updated. // 4. User's `rewardDebt` gets updated. } // Info of each pool. struct PoolInfo { IBEP20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. Token to distribute per block. uint256 lastRewardBlock; // Last block number that Token distribution occurs. uint256 accTokenPerShare; // Accumulated Token per share, times 1e18. See below. uint16 depositFeeBP; // Deposit fee in basis points uint256 lpSupply; } // The Reward Token. JungleSwap public token; // DEV address. address public constant devaddr = 0x2096aFDaA68EEaE1EbF95DFdf565eE6d9B1fbA37; // Fee address. address public constant feeaddr = 0x45472B519de9Ac90A09BF51d9E161B8C6476361D; // Reward tokens created per block. uint256 public tokenPerBlock; // Info of each pool. PoolInfo[] public poolInfo; // Info of each user that stakes LP tokens. mapping(uint256 => mapping(address => UserInfo)) public userInfo; // Total allocation points. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The block number when Token mining starts. uint256 public startBlock; // Maximum tokenPerBlock uint256 public constant maxEmissionRate = 10 ether; event Deposit(address indexed user, uint256 indexed pid, uint256 amount); event Withdraw(address indexed user, uint256 indexed pid, uint256 amount); event EmergencyWithdraw(address indexed user, uint256 indexed pid, uint256 amount); event SetFeeAddress(address indexed user, address indexed newAddress); event SetDevAddress(address indexed user, address indexed newAddress); event UpdateEmissionRate(address indexed user, uint256 tokenPerBlock); event addPool(uint256 indexed pid, address lpToken, uint256 allocPoint, uint256 depositFeeBP); event setPool(uint256 indexed pid, address lpToken, uint256 allocPoint, uint256 depositFeeBP); event UpdateStartBlock(uint256 newStartBlock); event tokenMintError(bytes reason); constructor( JungleSwap _tokenAddress, uint256 _tokenPerBlock, uint256 _startBlock ) public { token = _tokenAddress; tokenPerBlock = _tokenPerBlock; startBlock = _startBlock; } function poolLength() external view returns (uint256) { return poolInfo.length; } mapping(IBEP20 => bool) public poolExistence; modifier nonDuplicated(IBEP20 _lpToken) { require(poolExistence[_lpToken] == false, "nonDuplicated: duplicated"); _; } // Add a new lp to the pool. Can only be called by the owner. function add(uint256 _allocPoint, IBEP20 _lpToken, uint16 _depositFeeBP, bool _withUpdate) external onlyOwner nonDuplicated(_lpToken) { _lpToken.balanceOf(address(this)); // valid ERC20 token require(_depositFeeBP <= 400, "add: invalid deposit fee basis points"); if (_withUpdate) { massUpdatePools(); } uint256 lastRewardBlock = block.number > startBlock ? block.number : startBlock; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolExistence[_lpToken] = true; poolInfo.push( PoolInfo({ lpToken : _lpToken, allocPoint : _allocPoint, lastRewardBlock : lastRewardBlock, accTokenPerShare : 0, depositFeeBP : _depositFeeBP, lpSupply: 0 }) ); emit addPool(poolInfo.length - 1, address(_lpToken), _allocPoint, _depositFeeBP); } // Update the given pool's Token allocation point and deposit fee. Can only be called by the owner. function set(uint256 _pid, uint256 _allocPoint, uint16 _depositFeeBP, bool _withUpdate) external onlyOwner { require(_depositFeeBP <= 400, "set: invalid deposit fee basis points"); if (_withUpdate) { massUpdatePools(); } totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint); poolInfo[_pid].allocPoint = _allocPoint; poolInfo[_pid].depositFeeBP = _depositFeeBP; emit setPool(_pid, address(poolInfo[_pid].lpToken), _allocPoint, _depositFeeBP); } // Return reward multiplier over the given _from to _to block. function getMultiplier(uint256 _from, uint256 _to) public pure returns (uint256) { return _to.sub(_from); } // View function to see pending Token on frontend. function pendingToken(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accTokenPerShare = pool.accTokenPerShare; if (block.number > pool.lastRewardBlock && pool.lpSupply != 0 && totalAllocPoint > 0) { uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 tokenReward = multiplier.mul(tokenPerBlock).mul(pool.allocPoint).div(totalAllocPoint); accTokenPerShare = accTokenPerShare.add(tokenReward.mul(1e18).div(pool.lpSupply)); } return user.amount.mul(accTokenPerShare).div(1e18).sub(user.rewardDebt); } // Update reward variables for all pools. Be careful of gas spending! function massUpdatePools() public { uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { updatePool(pid); } } // Update reward variables of the given pool to be up-to-date. function updatePool(uint256 _pid) public { PoolInfo storage pool = poolInfo[_pid]; if (block.number <= pool.lastRewardBlock) { return; } if (pool.lpSupply == 0 || pool.allocPoint == 0) { pool.lastRewardBlock = block.number; return; } uint256 multiplier = getMultiplier(pool.lastRewardBlock, block.number); uint256 tokenReward = multiplier.mul(tokenPerBlock).mul(pool.allocPoint).div(totalAllocPoint); try token.mint(devaddr, tokenReward.div(10)) { } catch (bytes memory reason) { tokenReward = 0; emit tokenMintError(reason); } try token.mint(address(this), tokenReward) { } catch (bytes memory reason) { tokenReward = 0; emit tokenMintError(reason); } pool.accTokenPerShare = pool.accTokenPerShare.add(tokenReward.mul(1e18).div(pool.lpSupply)); pool.lastRewardBlock = block.number; } // Deposit LP tokens to MasterChef for Token allocation. function deposit(uint256 _pid, uint256 _amount) external nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; updatePool(_pid); if (user.amount > 0) { uint256 pending = user.amount.mul(pool.accTokenPerShare).div(1e18).sub(user.rewardDebt); if (pending > 0) { safeTokenTransfer(msg.sender, pending); } } if (_amount > 0) { uint256 balanceBefore = pool.lpToken.balanceOf(address(this)); pool.lpToken.safeTransferFrom(address(msg.sender), address(this), _amount); _amount = pool.lpToken.balanceOf(address(this)) - balanceBefore; if (pool.depositFeeBP > 0) { uint256 depositFee = _amount.mul(pool.depositFeeBP).div(10000); pool.lpToken.safeTransfer(feeaddr, depositFee); user.amount = user.amount.add(_amount).sub(depositFee); pool.lpSupply = pool.lpSupply.add(_amount).sub(depositFee); } else { user.amount = user.amount.add(_amount); pool.lpSupply = pool.lpSupply.add(_amount); } } user.rewardDebt = user.amount.mul(pool.accTokenPerShare).div(1e18); emit Deposit(msg.sender, _pid, _amount); } // Withdraw LP tokens from MasterChef. function withdraw(uint256 _pid, uint256 _amount) external nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; require(user.amount >= _amount, "withdraw: not good"); updatePool(_pid); uint256 pending = user.amount.mul(pool.accTokenPerShare).div(1e18).sub(user.rewardDebt); if (pending > 0) { safeTokenTransfer(msg.sender, pending); } if (_amount > 0) { user.amount = user.amount.sub(_amount); pool.lpToken.safeTransfer(address(msg.sender), _amount); pool.lpSupply = pool.lpSupply.sub(_amount); } user.rewardDebt = user.amount.mul(pool.accTokenPerShare).div(1e18); emit Withdraw(msg.sender, _pid, _amount); } // Withdraw without caring about rewards. EMERGENCY ONLY. function emergencyWithdraw(uint256 _pid) external nonReentrant { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][msg.sender]; uint256 amount = user.amount; user.amount = 0; user.rewardDebt = 0; pool.lpToken.safeTransfer(address(msg.sender), amount); if (pool.lpSupply >= amount) { pool.lpSupply = pool.lpSupply.sub(amount); } else { pool.lpSupply = 0; } emit EmergencyWithdraw(msg.sender, _pid, amount); } // Safe Token transfer function, just in case if rounding error causes pool to not have enough Token. function safeTokenTransfer(address _to, uint256 _amount) internal { uint256 TokenBal = token.balanceOf(address(this)); bool transferSuccess = false; if (_amount > TokenBal) { transferSuccess = token.transfer(_to, TokenBal); } else { transferSuccess = token.transfer(_to, _amount); } require(transferSuccess, "safeTokenTransfer: transfer failed"); } // Update Emission Rate function updateEmissionRate(uint256 _tokenPerBlock) external onlyOwner { require(_tokenPerBlock <= maxEmissionRate, "INCORRECT INPUT"); massUpdatePools(); tokenPerBlock = _tokenPerBlock; emit UpdateEmissionRate(msg.sender, _tokenPerBlock); } // Only update before start of farm function updateStartBlock(uint256 _newStartBlock) external onlyOwner { require(block.number < startBlock, "FARM ALREADY STARTED"); require(block.number < _newStartBlock, "INCORRECT INPUT"); uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { PoolInfo storage pool = poolInfo[pid]; pool.lastRewardBlock = _newStartBlock; } startBlock = _newStartBlock; emit UpdateStartBlock(startBlock); } }
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_tokenAddress","internalType":"contract JungleSwap"},{"type":"uint256","name":"_tokenPerBlock","internalType":"uint256"},{"type":"uint256","name":"_startBlock","internalType":"uint256"}]},{"type":"event","name":"Deposit","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"EmergencyWithdraw","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SetDevAddress","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"address","name":"newAddress","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"SetFeeAddress","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"address","name":"newAddress","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"UpdateEmissionRate","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"tokenPerBlock","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"UpdateStartBlock","inputs":[{"type":"uint256","name":"newStartBlock","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Withdraw","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"addPool","inputs":[{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"address","name":"lpToken","internalType":"address","indexed":false},{"type":"uint256","name":"allocPoint","internalType":"uint256","indexed":false},{"type":"uint256","name":"depositFeeBP","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"setPool","inputs":[{"type":"uint256","name":"pid","internalType":"uint256","indexed":true},{"type":"address","name":"lpToken","internalType":"address","indexed":false},{"type":"uint256","name":"allocPoint","internalType":"uint256","indexed":false},{"type":"uint256","name":"depositFeeBP","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"tokenMintError","inputs":[{"type":"bytes","name":"reason","internalType":"bytes","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"add","inputs":[{"type":"uint256","name":"_allocPoint","internalType":"uint256"},{"type":"address","name":"_lpToken","internalType":"contract IBEP20"},{"type":"uint16","name":"_depositFeeBP","internalType":"uint16"},{"type":"bool","name":"_withUpdate","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"deposit","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"devaddr","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"emergencyWithdraw","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"feeaddr","inputs":[]},{"type":"function","stateMutability":"pure","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getMultiplier","inputs":[{"type":"uint256","name":"_from","internalType":"uint256"},{"type":"uint256","name":"_to","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"massUpdatePools","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"maxEmissionRate","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"pendingToken","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"address","name":"_user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"poolExistence","inputs":[{"type":"address","name":"","internalType":"contract IBEP20"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"lpToken","internalType":"contract IBEP20"},{"type":"uint256","name":"allocPoint","internalType":"uint256"},{"type":"uint256","name":"lastRewardBlock","internalType":"uint256"},{"type":"uint256","name":"accTokenPerShare","internalType":"uint256"},{"type":"uint16","name":"depositFeeBP","internalType":"uint16"},{"type":"uint256","name":"lpSupply","internalType":"uint256"}],"name":"poolInfo","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"poolLength","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"set","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_allocPoint","internalType":"uint256"},{"type":"uint16","name":"_depositFeeBP","internalType":"uint16"},{"type":"bool","name":"_withUpdate","internalType":"bool"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"startBlock","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract JungleSwap"}],"name":"token","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"tokenPerBlock","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalAllocPoint","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updateEmissionRate","inputs":[{"type":"uint256","name":"_tokenPerBlock","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updatePool","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"updateStartBlock","inputs":[{"type":"uint256","name":"_newStartBlock","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"rewardDebt","internalType":"uint256"}],"name":"userInfo","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdraw","inputs":[{"type":"uint256","name":"_pid","internalType":"uint256"},{"type":"uint256","name":"_amount","internalType":"uint256"}]}]
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