Contract Name:
SmartChefInitializable
Contract Source Code:
File 1 of 1 : SmartChefInitializable
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
pragma abicoder v2;
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @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);
}
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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");
(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");
(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");
(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");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal 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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev 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 {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// 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;
}
}
library SafeERC20 {
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'
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) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
interface IPancakeProfile {
function createProfile(
uint256 _teamId,
address _nftAddress,
uint256 _tokenId
) external;
function increaseUserPoints(
address _userAddress,
uint256 _numberPoints,
uint256 _campaignId
) external;
function removeUserPoints(address _userAddress, uint256 _numberPoints) external;
function addNftAddress(address _nftAddress) external;
function addTeam(string calldata _teamName, string calldata _teamDescription) external;
function getUserProfile(address _userAddress)
external
view
returns (
uint256,
uint256,
uint256,
address,
uint256,
bool
);
function getUserStatus(address _userAddress) external view returns (bool);
function getTeamProfile(uint256 _teamId)
external
view
returns (
string memory,
string memory,
uint256,
uint256,
bool
);
}
contract SmartChefInitializable is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20Metadata;
// The address of the smart chef factory
address public immutable SMART_CHEF_FACTORY;
// Whether a limit is set for users
bool public userLimit;
// Whether it is initialized
bool public isInitialized;
// Accrued token per share
uint256 public accTokenPerShare;
// The block timestamp when CAKE mining ends
uint256 public endTimestamp;
// The block timestamp when CAKE mining starts
uint256 public startTimestamp;
// The block timestamp of the last pool update
uint256 public lastRewardTimestamp;
// The pool limit (0 if none)
uint256 public poolLimitPerUser;
// Seconds available for user limit (after start timestamp)
uint256 public numberSecondsForUserLimit;
// Pancake profile address
address public immutable pancakeProfile;
// Pancake Profile is requested
bool public pancakeProfileIsRequested;
// Pancake Profile points threshold
uint256 public pancakeProfileThresholdPoints;
// CAKE tokens created per second
uint256 public rewardPerSecond;
// The precision factor
uint256 public PRECISION_FACTOR;
// The reward token
IERC20Metadata public rewardToken;
// The staked token
IERC20Metadata public stakedToken;
// Info of each user that stakes tokens (stakedToken)
mapping(address => UserInfo) public userInfo;
struct UserInfo {
uint256 amount; // How many staked tokens the user has provided
uint256 rewardDebt;
}
event Deposit(address indexed user, uint256 amount);
event EmergencyWithdraw(address indexed user, uint256 amount);
event NewStartAndEndTimestamp(uint256 startTimestamp, uint256 endTimestamp);
event NewRewardPerSecond(uint256 rewardPerSecond);
event NewPoolLimit(uint256 poolLimitPerUser);
event RewardsStop(uint256 blockNumber);
event TokenRecovery(address indexed token, uint256 amount);
event Withdraw(address indexed user, uint256 amount);
event UpdateProfileAndThresholdPointsRequirement(bool isProfileRequested, uint256 thresholdPoints);
/**
* @notice Constructor
* @param _pancakeProfile: Pancake Profile address
* @param _pancakeProfileIsRequested: Pancake Profile is requested
* @param _pancakeProfileThresholdPoints: Pancake Profile need threshold points
*/
constructor(
address _pancakeProfile,
bool _pancakeProfileIsRequested,
uint256 _pancakeProfileThresholdPoints
) {
SMART_CHEF_FACTORY = msg.sender;
pancakeProfile = _pancakeProfile; // It can be empty on Other chain
if (_pancakeProfile != address(0)) {
IPancakeProfile(_pancakeProfile).getTeamProfile(1);
// if pancakeProfile is requested
pancakeProfileIsRequested = _pancakeProfileIsRequested;
// pancakeProfile threshold points when profile & points are requested
pancakeProfileThresholdPoints = _pancakeProfileThresholdPoints;
} else {
pancakeProfileIsRequested = false;
pancakeProfileThresholdPoints = 0;
}
}
/*
* @notice Initialize the contract
* @param _stakedToken: staked token address
* @param _rewardToken: reward token address
* @param _rewardPerSecond: reward per second (in rewardToken)
* @param _startTimestamp: start block timestamp
* @param _endTimestamp: end block timestamp
* @param _poolLimitPerUser: pool limit per user in stakedToken (if any, else 0)
* @param _numberSecondsForUserLimit: seconds available for user limit (after start timestamp)
* @param _admin: admin address with ownership
*/
function initialize(
IERC20Metadata _stakedToken,
IERC20Metadata _rewardToken,
uint256 _rewardPerSecond,
uint256 _startTimestamp,
uint256 _endTimestamp,
uint256 _poolLimitPerUser,
uint256 _numberSecondsForUserLimit,
address _admin
) external {
require(!isInitialized, "Already initialized");
require(msg.sender == SMART_CHEF_FACTORY, "Not factory");
require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current block timestamp");
// Make this contract initialized
isInitialized = true;
stakedToken = _stakedToken;
rewardToken = _rewardToken;
rewardPerSecond = _rewardPerSecond;
startTimestamp = _startTimestamp;
endTimestamp = _endTimestamp;
if (_poolLimitPerUser > 0) {
userLimit = true;
poolLimitPerUser = _poolLimitPerUser;
numberSecondsForUserLimit = _numberSecondsForUserLimit;
}
uint256 decimalsRewardToken = uint256(rewardToken.decimals());
require(decimalsRewardToken < 30, "Must be inferior to 30");
PRECISION_FACTOR = uint256(10**(uint256(30) - decimalsRewardToken));
require(PRECISION_FACTOR * rewardPerSecond / (10**decimalsRewardToken) >= 100_000_000, "rewardPerSecond must be larger");
// Set the lastRewardBlock as the startTimestamp
lastRewardTimestamp = startTimestamp;
// Transfer ownership to the admin address who becomes owner of the contract
transferOwnership(_admin);
}
/*
* @notice Deposit staked tokens and collect reward tokens (if any)
* @param _amount: amount to withdraw (in rewardToken)
*/
function deposit(uint256 _amount) external nonReentrant {
UserInfo storage user = userInfo[msg.sender];
if (pancakeProfile != address(0)) {
// Checks whether the user has an active profile
require(
(!pancakeProfileIsRequested && pancakeProfileThresholdPoints == 0) ||
IPancakeProfile(pancakeProfile).getUserStatus(msg.sender),
"Deposit: Must have an active profile"
);
uint256 numberUserPoints = 0;
if (pancakeProfileThresholdPoints > 0) {
require(pancakeProfile != address(0), "Deposit: PancakeProfile is not exist");
(, numberUserPoints, , , , ) = IPancakeProfile(pancakeProfile).getUserProfile(msg.sender);
}
require(
pancakeProfileThresholdPoints == 0 || numberUserPoints >= pancakeProfileThresholdPoints,
"Deposit: User is not get enough user points"
);
}
userLimit = hasUserLimit();
require(!userLimit || ((_amount + user.amount) <= poolLimitPerUser), "Deposit: Amount above limit");
_updatePool();
if (user.amount > 0) {
uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
if (pending > 0) {
rewardToken.safeTransfer(address(msg.sender), pending);
}
}
if (_amount > 0) {
user.amount = user.amount + _amount;
stakedToken.safeTransferFrom(address(msg.sender), address(this), _amount);
}
user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;
emit Deposit(msg.sender, _amount);
}
/*
* @notice Withdraw staked tokens and collect reward tokens
* @param _amount: amount to withdraw (in rewardToken)
*/
function withdraw(uint256 _amount) external nonReentrant {
UserInfo storage user = userInfo[msg.sender];
require(user.amount >= _amount, "Amount to withdraw too high");
_updatePool();
uint256 pending = (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
if (_amount > 0) {
user.amount = user.amount - _amount;
stakedToken.safeTransfer(address(msg.sender), _amount);
}
if (pending > 0) {
rewardToken.safeTransfer(address(msg.sender), pending);
}
user.rewardDebt = (user.amount * accTokenPerShare) / PRECISION_FACTOR;
emit Withdraw(msg.sender, _amount);
}
/*
* @notice Withdraw staked tokens without caring about rewards rewards
* @dev Needs to be for emergency.
*/
function emergencyWithdraw() external nonReentrant {
UserInfo storage user = userInfo[msg.sender];
uint256 amountToTransfer = user.amount;
user.amount = 0;
user.rewardDebt = 0;
if (amountToTransfer > 0) {
stakedToken.safeTransfer(address(msg.sender), amountToTransfer);
}
emit EmergencyWithdraw(msg.sender, user.amount);
}
/*
* @notice Stop rewards
* @dev Only callable by owner. Needs to be for emergency.
*/
function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {
rewardToken.safeTransfer(address(msg.sender), _amount);
}
/**
* @notice Allows the owner to recover tokens sent to the contract by mistake
* @param _token: token address
* @dev Callable by owner
*/
function recoverToken(address _token) external onlyOwner {
require(_token != address(stakedToken), "Operations: Cannot recover staked token");
require(_token != address(rewardToken), "Operations: Cannot recover reward token");
uint256 balance = IERC20Metadata(_token).balanceOf(address(this));
require(balance != 0, "Operations: Cannot recover zero balance");
IERC20Metadata(_token).safeTransfer(address(msg.sender), balance);
emit TokenRecovery(_token, balance);
}
/*
* @notice Stop rewards
* @dev Only callable by owner
*/
function stopReward() external onlyOwner {
endTimestamp = block.timestamp;
emit RewardsStop(endTimestamp);
}
/*
* @notice Update pool limit per user
* @dev Only callable by owner.
* @param _userLimit: whether the limit remains forced
* @param _poolLimitPerUser: new pool limit per user
*/
function updatePoolLimitPerUser(bool _userLimit, uint256 _poolLimitPerUser) external onlyOwner {
require(userLimit, "Must be set");
if (_userLimit) {
require(_poolLimitPerUser > poolLimitPerUser, "New limit must be higher");
poolLimitPerUser = _poolLimitPerUser;
} else {
userLimit = _userLimit;
poolLimitPerUser = 0;
}
emit NewPoolLimit(poolLimitPerUser);
}
/*
* @notice Update reward per block
* @dev Only callable by owner.
* @param _rewardPerSecond: the reward per second
*/
function updateRewardPerSecond(uint256 _rewardPerSecond) external onlyOwner {
require(block.timestamp < startTimestamp, "Pool has started");
uint256 decimalsRewardToken = uint256(rewardToken.decimals());
require(PRECISION_FACTOR * _rewardPerSecond / (10**decimalsRewardToken) >= 100_000_000, "rewardPerSecond must be larger");
rewardPerSecond = _rewardPerSecond;
emit NewRewardPerSecond(_rewardPerSecond);
}
/**
* @notice It allows the admin to update start and end blocks
* @dev This function is only callable by owner.
* @param _startTimestamp: the new start block timestamp
* @param _endTimestamp: the new end block timestamp
*/
function updateStartAndEndTimestamp(uint256 _startTimestamp, uint256 _endTimestamp) external onlyOwner {
require(block.timestamp < startTimestamp, "Pool has started");
require(_startTimestamp < _endTimestamp, "New startTimestamp must be lower than new endTimestamp");
require(block.timestamp < _startTimestamp, "New startTimestamp must be higher than current block timestamp");
startTimestamp = _startTimestamp;
endTimestamp = _endTimestamp;
// Set the lastRewardTimestamp as the startTimestamp
lastRewardTimestamp = startTimestamp;
emit NewStartAndEndTimestamp(_startTimestamp, _endTimestamp);
}
/**
* @notice It allows the admin to update profile and thresholdPoints' requirement.
* @dev This function is only callable by owner.
* @param _isRequested: the profile is requested
* @param _thresholdPoints: the threshold points
*/
function updateProfileAndThresholdPointsRequirement(bool _isRequested, uint256 _thresholdPoints)
external
onlyOwner
{
require(pancakeProfile != address(0), "Pancake profile address is null");
require(_thresholdPoints >= 0, "Threshold points need to exceed 0");
pancakeProfileIsRequested = _isRequested;
pancakeProfileThresholdPoints = _thresholdPoints;
emit UpdateProfileAndThresholdPointsRequirement(_isRequested, _thresholdPoints);
}
/*
* @notice View function to see pending reward on frontend.
* @param _user: user address
* @return Pending reward for a given user
*/
function pendingReward(address _user) external view returns (uint256) {
UserInfo storage user = userInfo[_user];
uint256 stakedTokenSupply = stakedToken.balanceOf(address(this));
if (block.timestamp > lastRewardTimestamp && stakedTokenSupply != 0) {
uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
uint256 cakeReward = multiplier * rewardPerSecond;
uint256 adjustedTokenPerShare = accTokenPerShare + (cakeReward * PRECISION_FACTOR) / stakedTokenSupply;
return (user.amount * adjustedTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
} else {
return (user.amount * accTokenPerShare) / PRECISION_FACTOR - user.rewardDebt;
}
}
/*
* @notice Update reward variables of the given pool to be up-to-date.
*/
function _updatePool() internal {
if (block.timestamp <= lastRewardTimestamp) {
return;
}
uint256 stakedTokenSupply = stakedToken.balanceOf(address(this));
if (stakedTokenSupply == 0) {
lastRewardTimestamp = block.timestamp;
return;
}
uint256 multiplier = _getMultiplier(lastRewardTimestamp, block.timestamp);
uint256 cakeReward = multiplier * rewardPerSecond;
accTokenPerShare = accTokenPerShare + (cakeReward * PRECISION_FACTOR) / stakedTokenSupply;
lastRewardTimestamp = block.timestamp;
}
/*
* @notice Return reward multiplier over the given _from to _to block.
* @param _from: block to start
* @param _to: block to finish
*/
function _getMultiplier(uint256 _from, uint256 _to) internal view returns (uint256) {
if (_to <= endTimestamp) {
return _to - _from;
} else if (_from >= endTimestamp) {
return 0;
} else {
return endTimestamp - _from;
}
}
/*
* @notice Return user limit is set or zero.
*/
function hasUserLimit() public view returns (bool) {
if (!userLimit || (block.timestamp >= (startTimestamp + numberSecondsForUserLimit))) {
return false;
}
return true;
}
}
contract SmartChefFactory is Ownable {
event NewSmartChefContract(address indexed smartChef);
constructor() {
//
}
/*
* @notice Deploy the pool
* @param _stakedToken: staked token address
* @param _rewardToken: reward token address
* @param _rewardPerSecond: reward per second (in rewardToken)
* @param _startTimestamp: start block timestamp
* @param _endTimestamp: end block timestamp
* @param _poolLimitPerUser: pool limit per user in stakedToken (if any, else 0)
* @param _numberSecondsForUserLimit: seconds available for user limit (after start block)
* @param _pancakeProfile: Pancake Profile address
* @param _pancakeProfileIsRequested: Pancake Profile is requested
* @param _pancakeProfileThresholdPoints: Pancake Profile need threshold points
* @param _admin: admin address with ownership
* @return address of new smart chef contract
*/
function deployPool(
IERC20Metadata _stakedToken,
IERC20Metadata _rewardToken,
uint256 _rewardPerSecond,
uint256 _startTimestamp,
uint256 _endTimestamp,
uint256 _poolLimitPerUser,
uint256 _numberSecondsForUserLimit,
address _pancakeProfile,
bool _pancakeProfileIsRequested,
uint256 _pancakeProfileThresholdPoints,
address _admin
) external onlyOwner {
require(_stakedToken.totalSupply() >= 0);
require(_rewardToken.totalSupply() >= 0);
require(_stakedToken != _rewardToken, "Tokens must be be different");
bytes memory bytecode = type(SmartChefInitializable).creationCode;
// pass constructor argument
bytecode = abi.encodePacked(
bytecode,
abi.encode(_pancakeProfile, _pancakeProfileIsRequested, _pancakeProfileThresholdPoints)
);
bytes32 salt = keccak256(abi.encodePacked(_stakedToken, _rewardToken, _startTimestamp));
address smartChefAddress;
assembly {
smartChefAddress := create2(0, add(bytecode, 32), mload(bytecode), salt)
}
SmartChefInitializable(smartChefAddress).initialize(
_stakedToken,
_rewardToken,
_rewardPerSecond,
_startTimestamp,
_endTimestamp,
_poolLimitPerUser,
_numberSecondsForUserLimit,
_admin
);
emit NewSmartChefContract(smartChefAddress);
}
}