- Contract name:
- MasterChef
- Optimization enabled
- true
- Compiler version
- v0.6.12+commit.27d51765
- Optimization runs
- 200
- EVM Version
- default
- Verified at
- 2021-11-29T15:21:50.959388Z
Constructor Arguments
000000000000000000000000f1e7010ac5e81b28f4b16b665d5e5e9429ee7b99000000000000000000000000f228306661778d7bdfbd84870b3a1c6be5d2caa9000000000000000000000000b01cb9b0c00da11bc48d21bd3b49847909da62c7000000000000000000000000000000000000000000000000000aa87bee5380000000000000000000000000000000000000000000000000000000000061a36f40
Arg [0] (address) : 0xf1e7010ac5e81b28f4b16b665d5e5e9429ee7b99
Arg [1] (address) : 0xf228306661778d7bdfbd84870b3a1c6be5d2caa9
Arg [2] (address) : 0xb01cb9b0c00da11bc48d21bd3b49847909da62c7
Arg [3] (uint256) : 3000000000000000
Arg [4] (uint256) : 1638100800
Contract source code
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuard { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; constructor () 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; } } /* * @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 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 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; } } /** * @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); } } } } interface IERC20 { /** * @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); } contract ERC20 is Context, IERC20, Ownable { using SafeMath for uint256; using Address for address; mapping(address => uint256) internal _balances; mapping(address => mapping(address => uint256)) internal _allowances; uint256 internal _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 {ERC20-totalSupply}. */ function totalSupply() public override view returns (uint256) { return _totalSupply; } /** * @dev See {ERC20-balanceOf}. */ function balanceOf(address account) public override view returns (uint256) { return _balances[account]; } /** * @dev See {ERC20-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 virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {ERC20-allowance}. */ function allowance(address owner, address spender) public override view returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {ERC20-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 {ERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}; * * 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 virtual override returns (bool) { _transfer(sender, recipient, amount); _approve( sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: 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 {ERC20-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 {ERC20-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, "ERC20: 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), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _balances[sender] = _balances[sender].sub(amount, "ERC20: 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), "ERC20: 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), "ERC20: burn from the zero address"); _balances[account] = _balances[account].sub(amount, "ERC20: 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), "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 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, "ERC20: burn amount exceeds allowance") ); } } // CaratToken with Governance. contract CaratToken is ERC20('Carat Token', 'CRT') { mapping (address => bool) public _isExcludedFromMaxHolding; mapping (address => bool) public _isExcludedFromMaxTransfer; uint256 public maxTransfer = 20 * 1e18; uint256 public maxHolding = 50 * 1e18; event Mint(address to, uint256 amount); event Burn(address from, uint256 amount); constructor () public { _isExcludedFromMaxHolding[msg.sender] = true; _isExcludedFromMaxTransfer[msg.sender] = true; } /// @dev Creates `_amount` token to `_to`. Must only be called by the owner (MasterChef). function mint(address _to, uint256 _amount) public onlyOwner { _mint(_to, _amount); _moveDelegates(address(0), _delegates[_to], _amount); emit Mint(_to , _amount); } // @notice Destroys `amount` tokens from `account`, reducing the total supply. function burn(uint256 amount) public { _burn(msg.sender, amount); _moveDelegates(address(0), _delegates[msg.sender], amount); emit Burn(msg.sender , amount); } function transfer(address recipient, uint256 amount) public override returns (bool) { if(!_isExcludedFromMaxHolding[recipient]){ require(balanceOf(recipient).add(amount) <= maxHolding , "recipient holdings exeed Max holding"); } if(!_isExcludedFromMaxTransfer[msg.sender] && !_isExcludedFromMaxTransfer[recipient]){ require(amount <= maxTransfer , "Max Transfer exceeded"); } _transfer(_msgSender(), recipient, amount); return true; } function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) { if(!_isExcludedFromMaxHolding[recipient]){ require(balanceOf(recipient).add(amount) <= maxHolding , "recipient holdings exeed Max holding"); } if(!_isExcludedFromMaxTransfer[msg.sender] && !_isExcludedFromMaxTransfer[recipient]){ require(amount <= maxTransfer , "Max Transfer exceeded"); } _transfer(sender, recipient, amount); _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance")); return true; } function setMaxTransfer(uint256 _maxTransfer) external onlyOwner { require(_maxTransfer >= 1e18 , "Error : Minimum maxTxLimit is 1 CRT"); maxTransfer = _maxTransfer; } function setMaxHolding(uint256 _maxHolding) external onlyOwner { require(_maxHolding >= 1e18 , "Error : Minimum maxHolding is 1 CRT"); maxHolding = _maxHolding; } function excludeFromMaxHolding(address account) external onlyOwner { require(!_isExcludedFromMaxHolding[account], "Account is already excluded From MaxHolding"); _isExcludedFromMaxHolding[account] = true; } function includeInMaxHolding(address account) external onlyOwner { require( _isExcludedFromMaxHolding[account], "Account is not excluded From MaxHolding"); _isExcludedFromMaxHolding[account] = false; } function excludeFromMaxTransfer(address account) external onlyOwner { require(!_isExcludedFromMaxTransfer[account], "Account is already excluded From MaxTransfer"); _isExcludedFromMaxTransfer[account] = true; } function includeInMaxTransfer(address account) external onlyOwner { require( _isExcludedFromMaxTransfer[account], "Account is not excluded From MaxTransfer"); _isExcludedFromMaxTransfer[account] = false; } // Copied and modified from YAM code: // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernanceStorage.sol // https://github.com/yam-finance/yam-protocol/blob/master/contracts/token/YAMGovernance.sol // Which is copied and modified from COMPOUND: // https://github.com/compound-finance/compound-protocol/blob/master/contracts/Governance/Comp.sol /// @dev A record of each accounts delegate mapping (address => address) internal _delegates; /// @dev A checkpoint for marking number of votes from a given block struct Checkpoint { uint32 fromBlock; uint256 votes; } /// @dev A record of votes checkpoints for each account, by index mapping (address => mapping (uint32 => Checkpoint)) public checkpoints; /// @dev The number of checkpoints for each account mapping (address => uint32) public numCheckpoints; /// @dev The EIP-712 typehash for the contract's domain bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)"); /// @dev The EIP-712 typehash for the delegation struct used by the contract bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)"); /// @dev A record of states for signing / validating signatures mapping (address => uint) public nonces; /// @dev An event thats emitted when an account changes its delegate event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate); /// @dev An event thats emitted when a delegate account's vote balance changes event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance); /** * @dev Delegate votes from `msg.sender` to `delegatee` * @param delegator The address to get delegatee for */ function delegates(address delegator) external view returns (address) { return _delegates[delegator]; } /** * @dev Delegate votes from `msg.sender` to `delegatee` * @param delegatee The address to delegate votes to */ function delegate(address delegatee) external { return _delegate(msg.sender, delegatee); } /** * @dev Delegates votes from signatory to `delegatee` * @param delegatee The address to delegate votes to * @param nonce The contract state required to match the signature * @param expiry The time at which to expire the signature * @param v The recovery byte of the signature * @param r Half of the ECDSA signature pair * @param s Half of the ECDSA signature pair */ function delegateBySig( address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s ) external { bytes32 domainSeparator = keccak256( abi.encode( DOMAIN_TYPEHASH, keccak256(bytes(name())), getChainId(), address(this) ) ); bytes32 structHash = keccak256( abi.encode( DELEGATION_TYPEHASH, delegatee, nonce, expiry ) ); bytes32 digest = keccak256( abi.encodePacked( "\x19\x01", domainSeparator, structHash ) ); address signatory = ecrecover(digest, v, r, s); require(signatory != address(0), "CRT::delegateBySig: invalid signature"); require(nonce == nonces[signatory]++, "CRT::delegateBySig: invalid nonce"); require(now <= expiry, "CRT::delegateBySig: signature expired"); return _delegate(signatory, delegatee); } /** * @dev Gets the current votes balance for `account` * @param account The address to get votes balance * @return The number of current votes for `account` */ function getCurrentVotes(address account) external view returns (uint256) { uint32 nCheckpoints = numCheckpoints[account]; return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0; } /** * @dev Determine the prior number of votes for an account as of a block number * @dev Block number must be a finalized block or else this function will revert to prevent misinformation. * @param account The address of the account to check * @param blockNumber The block number to get the vote balance at * @return The number of votes the account had as of the given block */ function getPriorVotes(address account, uint blockNumber) external view returns (uint256) { require(blockNumber < block.number, "CRT::getPriorVotes: not yet determined"); uint32 nCheckpoints = numCheckpoints[account]; if (nCheckpoints == 0) { return 0; } // First check most recent balance if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) { return checkpoints[account][nCheckpoints - 1].votes; } // Next check implicit zero balance if (checkpoints[account][0].fromBlock > blockNumber) { return 0; } uint32 lower = 0; uint32 upper = nCheckpoints - 1; while (upper > lower) { uint32 center = upper - (upper - lower) / 2; // ceil, avoiding overflow Checkpoint memory cp = checkpoints[account][center]; if (cp.fromBlock == blockNumber) { return cp.votes; } else if (cp.fromBlock < blockNumber) { lower = center; } else { upper = center - 1; } } return checkpoints[account][lower].votes; } function _delegate(address delegator, address delegatee) internal { address currentDelegate = _delegates[delegator]; uint256 delegatorBalance = balanceOf(delegator); // balance of underlying VICTs (not scaled); _delegates[delegator] = delegatee; emit DelegateChanged(delegator, currentDelegate, delegatee); _moveDelegates(currentDelegate, delegatee, delegatorBalance); } function _moveDelegates(address srcRep, address dstRep, uint256 amount) internal { if (srcRep != dstRep && amount > 0) { if (srcRep != address(0)) { // decrease old representative uint32 srcRepNum = numCheckpoints[srcRep]; uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0; uint256 srcRepNew = srcRepOld.sub(amount); _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew); } if (dstRep != address(0)) { // increase new representative uint32 dstRepNum = numCheckpoints[dstRep]; uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0; uint256 dstRepNew = dstRepOld.add(amount); _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew); } } } function _writeCheckpoint( address delegatee, uint32 nCheckpoints, uint256 oldVotes, uint256 newVotes ) internal { uint32 blockNumber = safe32(block.number, "CRT::_writeCheckpoint: block number exceeds 32 bits"); if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) { checkpoints[delegatee][nCheckpoints - 1].votes = newVotes; } else { checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes); numCheckpoints[delegatee] = nCheckpoints + 1; } emit DelegateVotesChanged(delegatee, oldVotes, newVotes); } function safe32(uint n, string memory errorMessage) internal pure returns (uint32) { require(n < 2**32, errorMessage); return uint32(n); } function getChainId() internal pure returns (uint) { uint256 chainId; assembly { chainId := chainid() } return chainId; } } /** * @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( IERC20 token, address to, uint256 value ) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } function safeTransferFrom( IERC20 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( IERC20 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( IERC20 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( IERC20 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(IERC20 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 CRT. He can make Carat 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 CRT 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 IERC20; // 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 CRT // entitled to a user but is pending to be distributed is: // // pending reward = (user.amount * pool.accCaratPerShare) - user.rewardDebt // // Whenever a user deposits or withdraws LP tokens to a pool. Here's what happens: // 1. The pool's `accCaratPerShare` (and `lastRewardTimestamp`) 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 { IERC20 lpToken; // Address of LP token contract. uint256 allocPoint; // How many allocation points assigned to this pool. CRT to distribute per second. uint256 lastRewardTimestamp; // Last timestamp that CRT distribution occurs. uint256 accCaratPerShare; // Accumulated CRT per share, times 1e12. See below. uint16 depositFeeBP; // Deposit fee in basis points uint16 withdrawalFeeBP; // Deposit fee in basis points uint256 lpSupply; } // The CRT TOKEN! CaratToken public crt; // Dev address. address public devaddr; // CRT tokens created per second. uint256 public crtPerSec; // Bonus muliplier for early CRT makers. uint256 public constant BONUS_MULTIPLIER = 1; // Deposit/Withdrawal Fee address address public feeAddress; // Info of each pool. PoolInfo[] public poolInfo; // Info of each user that stakes LP tokens. mapping(uint256 => mapping(address => UserInfo)) public userInfo; // excluded list from Fees mapping (address => bool) private _isExcludedFromFee; // Total allocation points. Must be the sum of all allocation points in all pools. uint256 public totalAllocPoint = 0; // The timestamp when Carat mining starts. uint256 public startTimestamp; // Max CRT supply to be minted. uint256 public MaxSupply = 40000 * 1e18; 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 crtPerSec); event addPool(uint256 indexed pid, address lpToken, uint256 allocPoint, uint256 depositFeeBP, uint256 withdrawalFeeBP); event setPool(uint256 indexed pid, address lpToken, uint256 allocPoint, uint256 depositFeeBP, uint256 withdrawalFeeBP); event UpdateStartTimestamp(uint256 newStartTimestamp); event ExcludeFromFee(address account); event IncludeInFee(address account); constructor( CaratToken _crt, address _devaddr, address _feeAddress, uint256 _crtPerSec, uint256 _startTimestamp ) public { crt = _crt; devaddr = _devaddr; feeAddress = _feeAddress; crtPerSec = _crtPerSec; startTimestamp = _startTimestamp; } function poolLength() external view returns (uint256) { return poolInfo.length; } mapping(IERC20 => bool) public poolExistence; modifier nonDuplicated(IERC20 _lpToken) { require(poolExistence[_lpToken] == false, "nonDuplicated: duplicated"); _; } // Exclude an account from fee function excludeFromFee(address account) external onlyOwner { require(!_isExcludedFromFee[account], "Account is already excluded From Fee"); _isExcludedFromFee[account] = true; emit ExcludeFromFee(account); } // Include an account in fee function includeInFee(address account) external onlyOwner { require( _isExcludedFromFee[account], "Account is not excluded From Fee"); _isExcludedFromFee[account] = false; emit IncludeInFee(account); } function isExcludedFromFee(address account)external view returns(bool){ return(_isExcludedFromFee[account]); } function mintCRT(address account , uint256 amount) private { uint256 mintAmount = amount; uint256 totalSupply = crt.totalSupply(); if ( amount.add(totalSupply) > MaxSupply){ mintAmount = MaxSupply.sub(totalSupply); } crt.mint(account, mintAmount); } // Add a new lp to the pool. Can only be called by the owner. function add(uint256 _allocPoint, IERC20 _lpToken, uint16 _depositFeeBP, uint16 _withdrawalFeeBP, bool _withUpdate) external onlyOwner nonDuplicated(_lpToken) { // valid ERC20 token _lpToken.balanceOf(address(this)); require(_depositFeeBP <= 600, "add: invalid deposit fee basis points"); require(_withdrawalFeeBP <= 600, "add: invalid withdrawal fee basis points"); if (_withUpdate) { massUpdatePools(); } uint256 lastRewardTimestamp = block.timestamp > startTimestamp ? block.timestamp : startTimestamp; totalAllocPoint = totalAllocPoint.add(_allocPoint); poolExistence[_lpToken] = true; poolInfo.push(PoolInfo({ lpToken : _lpToken, allocPoint : _allocPoint, lastRewardTimestamp: lastRewardTimestamp, accCaratPerShare : 0, depositFeeBP : _depositFeeBP, withdrawalFeeBP : _withdrawalFeeBP, lpSupply: 0 })); emit addPool(poolInfo.length - 1, address(_lpToken), _allocPoint, _depositFeeBP, _withdrawalFeeBP); } // Update the given pool's CRT allocation point and deposit fee. Can only be called by the owner. function set(uint256 _pid, uint256 _allocPoint, uint16 _depositFeeBP, uint16 _withdrawalFeeBP, bool _withUpdate) external onlyOwner { require(_depositFeeBP <= 600, "add: invalid deposit fee basis points"); require(_withdrawalFeeBP <= 600, "add: invalid withdrawal fee basis points"); if (_withUpdate) { massUpdatePools(); } totalAllocPoint = totalAllocPoint.sub(poolInfo[_pid].allocPoint).add(_allocPoint); poolInfo[_pid].allocPoint = _allocPoint; poolInfo[_pid].depositFeeBP = _depositFeeBP; poolInfo[_pid].withdrawalFeeBP = _withdrawalFeeBP; emit setPool(_pid, address(poolInfo[_pid].lpToken), _allocPoint, _depositFeeBP, _withdrawalFeeBP); } // Return reward multiplier over the given _from to _to timestamp. function getMultiplier(uint256 _from, uint256 _to) public pure returns (uint256) { return _to.sub(_from); } // View function to see pending CRT on frontend. function pendingCarat(uint256 _pid, address _user) external view returns (uint256) { PoolInfo storage pool = poolInfo[_pid]; UserInfo storage user = userInfo[_pid][_user]; uint256 accCaratPerShare = pool.accCaratPerShare; if (block.timestamp > pool.lastRewardTimestamp && pool.lpSupply != 0 && totalAllocPoint > 0) { uint256 multiplier = getMultiplier(pool.lastRewardTimestamp, block.timestamp); uint256 crtReward = multiplier.mul(crtPerSec).mul(pool.allocPoint).div(totalAllocPoint); accCaratPerShare = accCaratPerShare.add(crtReward.mul(1e12).div(pool.lpSupply)); } return user.amount.mul(accCaratPerShare).div(1e12).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.timestamp <= pool.lastRewardTimestamp) { return; } if (pool.lpSupply == 0 || pool.allocPoint == 0) { pool.lastRewardTimestamp = block.timestamp; return; } uint256 multiplier = getMultiplier(pool.lastRewardTimestamp, block.timestamp); uint256 crtReward = multiplier.mul(crtPerSec).mul(pool.allocPoint).div(totalAllocPoint); mintCRT(devaddr, crtReward.div(10)); mintCRT(address(this), crtReward); pool.accCaratPerShare = pool.accCaratPerShare.add(crtReward.mul(1e12).div(pool.lpSupply)); pool.lastRewardTimestamp = block.timestamp; } // Deposit LP tokens to MasterChef for CRT 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.accCaratPerShare).div(1e12).sub(user.rewardDebt); if (pending > 0) { safeCaratTransfer(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 && !_isExcludedFromFee[msg.sender]) { uint256 depositFee = _amount.mul(pool.depositFeeBP).div(10000); pool.lpToken.safeTransfer(feeAddress, 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.accCaratPerShare).div(1e12); 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.accCaratPerShare).div(1e12).sub(user.rewardDebt); if (pending > 0) { safeCaratTransfer(msg.sender, pending); } if (_amount > 0) { if (pool.withdrawalFeeBP > 0 && !_isExcludedFromFee[msg.sender]) { uint256 withdrawalFee = _amount.mul(pool.withdrawalFeeBP).div(10000); pool.lpToken.safeTransfer(feeAddress, withdrawalFee); user.amount = user.amount.sub(_amount); pool.lpToken.safeTransfer(address(msg.sender), _amount.sub(withdrawalFee)); } else { 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.accCaratPerShare).div(1e12); 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 crt transfer function, just in case if rounding error causes pool to not have enough CRT. function safeCaratTransfer(address _to, uint256 _amount) internal { uint256 crtBal = crt.balanceOf(address(this)); bool transferSuccess = false; if (_amount > crtBal) { transferSuccess = crt.transfer(_to, crtBal); } else { transferSuccess = crt.transfer(_to, _amount); } require(transferSuccess, "safeCaratTransfer: transfer failed"); } // Update dev address. function setDevAddress(address _devaddr) external { require(msg.sender == devaddr || msg.sender == owner() , "dev: wut?"); require(_devaddr != address(0), "!nonzero"); devaddr = _devaddr; emit SetDevAddress(msg.sender, _devaddr); } function setFeeAddress(address _feeAddress) external { require(msg.sender == feeAddress || msg.sender == owner() , "setFeeAddress: FORBIDDEN"); require(_feeAddress != address(0), "!nonzero"); feeAddress = _feeAddress; emit SetFeeAddress(msg.sender, _feeAddress); } function updateEmissionRate(uint256 _crtPerSec) external onlyOwner { massUpdatePools(); crtPerSec = _crtPerSec; emit UpdateEmissionRate(msg.sender, _crtPerSec); } // Only update before start of farm function updateStartTimestamp(uint256 _newStartTimestamp) external onlyOwner { require(block.timestamp < startTimestamp, "cannot change start timestamp if farm has already started"); require(block.timestamp < _newStartTimestamp, "cannot set start timestamp in the past"); uint256 length = poolInfo.length; for (uint256 pid = 0; pid < length; ++pid) { PoolInfo storage pool = poolInfo[pid]; pool.lastRewardTimestamp = _newStartTimestamp; } startTimestamp = _newStartTimestamp; emit UpdateStartTimestamp(startTimestamp); } }
Contract ABI
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