FTM Price: $0.99 (-3.62%)
Gas: 90 GWei

Contract

0x9c09eA872582bA02E0008C4853eAA5199bF8D0a7
 

Overview

FTM Balance

Fantom LogoFantom LogoFantom Logo0 FTM

FTM Value

$0.00

Token Holdings

Sponsored

Transaction Hash
Method
Block
From
To
Value
Emergency Withdr...675781922023-08-29 15:22:38212 days ago1693322558IN
0x9c09eA87...99bF8D0a7
0 FTM0.0030537459.66102527
Emergency Withdr...675781762023-08-29 15:21:49212 days ago1693322509IN
0x9c09eA87...99bF8D0a7
0 FTM0.02824198572.72032897
Withdraw568699982023-03-03 16:08:39391 days ago1677859719IN
0x9c09eA87...99bF8D0a7
0 FTM0.002677526.53126139
Emergency Withdr...568697922023-03-03 16:04:26391 days ago1677859466IN
0x9c09eA87...99bF8D0a7
0 FTM0.0055551777.92691262
Withdraw550657142023-02-04 14:35:42419 days ago1675521342IN
0x9c09eA87...99bF8D0a7
0 FTM0.01264466131.88977274
Withdraw547524512023-01-31 1:11:12423 days ago1675127472IN
0x9c09eA87...99bF8D0a7
0 FTM0.004739949.43943028
Withdraw541273462023-01-21 6:48:13433 days ago1674283693IN
0x9c09eA87...99bF8D0a7
0 FTM0.0066911669.80073396
Harvest540049232023-01-18 21:41:15435 days ago1674078075IN
0x9c09eA87...99bF8D0a7
0 FTM0.016318550
Withdraw539133052023-01-17 5:32:44437 days ago1673933564IN
0x9c09eA87...99bF8D0a7
0 FTM0.0035542237.07218641
Withdraw537136862023-01-13 21:50:12440 days ago1673646612IN
0x9c09eA87...99bF8D0a7
0 FTM0.004472146.65779239
Deposit535235382023-01-10 5:23:23444 days ago1673328203IN
0x9c09eA87...99bF8D0a7
0 FTM0.0026961533.2305087
Withdraw535233592023-01-10 5:20:08444 days ago1673328008IN
0x9c09eA87...99bF8D0a7
0 FTM0.0034862234.62919859
Deposit535231692023-01-10 5:16:46444 days ago1673327806IN
0x9c09eA87...99bF8D0a7
0 FTM0.0040967235.520245
Deposit535231632023-01-10 5:16:40444 days ago1673327800IN
0x9c09eA87...99bF8D0a7
0 FTM0.0040773335.35209506
Withdraw518732402022-12-04 13:12:03481 days ago1670159523IN
0x9c09eA87...99bF8D0a7
0 FTM0.0012691515.18405923
Withdraw516675092022-11-30 12:24:56485 days ago1669811096IN
0x9c09eA87...99bF8D0a7
0 FTM0.0073506776.67095019
Withdraw505841152022-11-07 20:07:47507 days ago1667851667IN
0x9c09eA87...99bF8D0a7
0 FTM0.08675646904.91025768
Withdraw505566322022-11-07 3:01:55508 days ago1667790115IN
0x9c09eA87...99bF8D0a7
0 FTM0.0088251870
Withdraw505344172022-11-06 13:09:08509 days ago1667740148IN
0x9c09eA87...99bF8D0a7
0 FTM0.06888559684.33252719
Withdraw505207252022-11-06 4:45:44509 days ago1667709944IN
0x9c09eA87...99bF8D0a7
0 FTM0.0026478921
Withdraw504823972022-11-05 7:12:11510 days ago1667632331IN
0x9c09eA87...99bF8D0a7
0 FTM0.0095897100
Deposit504823552022-11-05 7:10:58510 days ago1667632258IN
0x9c09eA87...99bF8D0a7
0 FTM0.0115359100
Harvest All Rewa...504768732022-11-05 3:39:23510 days ago1667619563IN
0x9c09eA87...99bF8D0a7
0 FTM0.221098855.66562614
Harvest All Rewa...504711242022-11-04 23:51:23510 days ago1667605883IN
0x9c09eA87...99bF8D0a7
0 FTM0.05122179118
Deposit504710482022-11-04 23:48:41510 days ago1667605721IN
0x9c09eA87...99bF8D0a7
0 FTM0.01080003101
View all transactions

Latest 1 internal transaction

Parent Txn Hash Block From To Value
341592502022-03-23 3:26:51737 days ago1648006011  Contract Creation0 FTM
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x6D0e7823...C1D52d56A
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
FantasticChef

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, Unlicense license

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 8 : FantasticChef.sol
// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.4;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../interfaces/IFantasticStaking.sol";
import "../interfaces/IRewarder.sol";

contract FantasticChef is Ownable {
    using SafeERC20 for IERC20;

    struct UserInfo {
        uint256 amount;
        int256 rewardDebt;
    }

    struct PoolInfo {
        uint256 accRewardPerShare;
        uint256 lastRewardTime;
        uint256 allocPoint;
    }

    IFantasticStaking public rewardMinter;

    /// @notice Info of each MCV2 pool.
    PoolInfo[] public poolInfo;
    /// @notice Address of the LP token for each MCV2 pool.
    IERC20[] public lpToken;
    /// @notice Address of each `IRewarder` contract in MCV2.
    IRewarder[] public rewarder;

    /// @notice Info of each user that stakes LP tokens.
    mapping(uint256 => mapping(address => UserInfo)) public userInfo;
    /// @dev Total allocation points. Must be the sum of all allocation points in all pools.
    uint256 public totalAllocPoint = 0;

    uint256 public rewardPerSecond;
    uint256 private constant ACC_REWARD_PRECISION = 1e12;
    uint256 private constant MAX_REWARD_PER_SECOND = 1e18; // 1 token per second
    uint256 private constant MAX_NUM_OF_POOLS = 36;

    /* ========== PUBLIC FUNCTIONS ========== */

    /// @notice Returns the number of MCV2 pools.
    function poolLength() public view returns (uint256 pools) {
        pools = poolInfo.length;
    }

    /// @notice View function to see pending reward on frontend.
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _user Address of user.
    /// @return pending reward for a given user.
    function pendingReward(uint256 _pid, address _user) external view returns (uint256 pending) {
        PoolInfo memory pool = poolInfo[_pid];
        UserInfo storage user = userInfo[_pid][_user];
        uint256 accRewardPerShare = pool.accRewardPerShare;
        uint256 lpSupply = lpToken[_pid].balanceOf(address(this));
        if (block.timestamp > pool.lastRewardTime && lpSupply != 0) {
            uint256 time = block.timestamp - pool.lastRewardTime;
            uint256 rewardAmount = (time * rewardPerSecond * pool.allocPoint) / totalAllocPoint;
            accRewardPerShare += (rewardAmount * ACC_REWARD_PRECISION) / lpSupply;
        }
        pending = uint256(
            int256((user.amount * accRewardPerShare) / ACC_REWARD_PRECISION) - user.rewardDebt
        );
    }

    /// @notice Update reward variables of the given pool.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @return pool Returns the pool that was updated.
    function updatePool(uint256 pid) public returns (PoolInfo memory pool) {
        pool = poolInfo[pid];
        if (block.timestamp > pool.lastRewardTime) {
            uint256 lpSupply = lpToken[pid].balanceOf(address(this));
            if (lpSupply > 0) {
                uint256 time = block.timestamp - pool.lastRewardTime;
                uint256 rewardAmount = (time * rewardPerSecond * pool.allocPoint) / totalAllocPoint;
                pool.accRewardPerShare += (rewardAmount * ACC_REWARD_PRECISION) / lpSupply;
            }
            pool.lastRewardTime = block.timestamp;
            poolInfo[pid] = pool;
            emit LogUpdatePool(pid, pool.lastRewardTime, lpSupply, pool.accRewardPerShare);
        }
    }

    /// @notice Update reward variables for all pools. Be careful of gas spending!
    function massUpdatePools() public {
        uint256 len = poolInfo.length;
        for (uint256 i = 0; i < len; ++i) {
            updatePool(i);
        }
    }

    /// @notice Deposit LP tokens to MCV2 for reward allocation.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to deposit.
    /// @param to The receiver of `amount` deposit benefit.
    function deposit(
        uint256 pid,
        uint256 amount,
        address to
    ) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][to];

        // Effects
        user.amount += amount;
        user.rewardDebt += int256((amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);

        // Interactions
        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, to, to, 0, user.amount);
        }

        lpToken[pid].safeTransferFrom(msg.sender, address(this), amount);

        emit Deposit(msg.sender, pid, amount, to);
    }

    /// @notice Withdraw LP tokens from MCV2.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to withdraw.
    /// @param to Receiver of the LP tokens.
    function withdraw(
        uint256 pid,
        uint256 amount,
        address to
    ) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][msg.sender];

        // Effects
        user.rewardDebt -= int256((amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);
        user.amount -= amount;

        // Interactions
        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, 0, user.amount);
        }

        lpToken[pid].safeTransfer(to, amount);

        emit Withdraw(msg.sender, pid, amount, to);
    }

    /// @notice Harvest proceeds for transaction sender to `to`.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param to Receiver of rewards.
    function harvest(uint256 pid, address to) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][msg.sender];
        int256 accumulatedReward = int256(
            (user.amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION
        );
        uint256 _pendingReward = uint256(accumulatedReward - user.rewardDebt);

        // Effects
        user.rewardDebt = accumulatedReward;

        // Interactions
        if (_pendingReward != 0) {
            rewardMinter.mint(to, _pendingReward);
        }

        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, _pendingReward, user.amount);
        }

        emit Harvest(msg.sender, pid, _pendingReward);
    }

    /// @notice Withdraw LP tokens from MCV2 and harvest proceeds for transaction sender to `to`.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param amount LP token amount to withdraw.
    /// @param to Receiver of the LP tokens and rewards.
    function withdrawAndHarvest(
        uint256 pid,
        uint256 amount,
        address to
    ) public {
        PoolInfo memory pool = updatePool(pid);
        UserInfo storage user = userInfo[pid][msg.sender];
        int256 accumulatedReward = int256(
            (user.amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION
        );
        uint256 _pendingReward = uint256(accumulatedReward - user.rewardDebt);

        // Effects
        user.rewardDebt =
            accumulatedReward -
            int256((amount * pool.accRewardPerShare) / ACC_REWARD_PRECISION);
        user.amount -= amount;

        // Interactions
        if (_pendingReward != 0) {
            rewardMinter.mint(to, _pendingReward);
        }

        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, _pendingReward, user.amount);
        }

        lpToken[pid].safeTransfer(to, amount);

        emit Withdraw(msg.sender, pid, amount, to);
        emit Harvest(msg.sender, pid, _pendingReward);
    }

    /// @notice Withdraw without caring about rewards. EMERGENCY ONLY.
    /// @param pid The index of the pool. See `poolInfo`.
    /// @param to Receiver of the LP tokens.
    function emergencyWithdraw(uint256 pid, address to) public {
        UserInfo storage user = userInfo[pid][msg.sender];
        uint256 amount = user.amount;
        user.amount = 0;
        user.rewardDebt = 0;

        IRewarder _rewarder = rewarder[pid];
        if (address(_rewarder) != address(0)) {
            _rewarder.onReward(pid, msg.sender, to, 0, 0);
        }

        // Note: transfer can fail or succeed if `amount` is zero.
        lpToken[pid].safeTransfer(to, amount);
        emit EmergencyWithdraw(msg.sender, pid, amount, to);
    }

    function harvestAllRewards(address to) external {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            harvest(pid, to);
        }
    }

    /* ========== INTERNAL FUNCTIONS ========== */

    function checkPoolDuplicate(IERC20 _lpToken) internal view {
        uint256 length = poolInfo.length;
        for (uint256 pid = 0; pid < length; ++pid) {
            require(lpToken[pid] != _lpToken, "add: existing pool?");
        }
    }

    /* ========== RESTRICTED FUNCTIONS ========== */

    /// @notice Add a new LP to the pool. Can only be called by the owner.
    /// DO NOT add the same LP token more than once. Rewards will be messed up if you do.
    /// @param allocPoint AP of the new pool.
    /// @param _lpToken Address of the LP ERC-20 token.
    /// @param _rewarder Address of the rewarder delegate.
    function add(
        uint256 allocPoint,
        IERC20 _lpToken,
        IRewarder _rewarder
    ) public onlyOwner {
        checkPoolDuplicate(_lpToken);
        massUpdatePools();
        totalAllocPoint += allocPoint;
        lpToken.push(_lpToken);
        rewarder.push(_rewarder);

        poolInfo.push(
            PoolInfo({
                allocPoint: allocPoint,
                lastRewardTime: block.timestamp,
                accRewardPerShare: 0
            })
        );
        require(poolInfo.length <= MAX_NUM_OF_POOLS, "FantasticChef::add: > MAX_NUM_OF_POOLS");
        emit LogPoolAddition(lpToken.length - 1, allocPoint, _lpToken, _rewarder);
    }

    /// @notice Update the given pool's reward allocation point and `IRewarder` contract.
    // Can only be called by the owner.
    /// @param _pid The index of the pool. See `poolInfo`.
    /// @param _allocPoint New AP of the pool.
    /// @param _rewarder Address of the rewarder delegate.
    /// @param overwrite True if _rewarder should be `set`. Otherwise `_rewarder` is ignored.
    function set(
        uint256 _pid,
        uint256 _allocPoint,
        IRewarder _rewarder,
        bool overwrite
    ) public onlyOwner {
        massUpdatePools();
        totalAllocPoint = totalAllocPoint - poolInfo[_pid].allocPoint + _allocPoint;
        poolInfo[_pid].allocPoint = _allocPoint;
        if (overwrite) {
            rewarder[_pid] = _rewarder;
        }
        emit LogSetPool(_pid, _allocPoint, overwrite ? _rewarder : rewarder[_pid], overwrite);
    }

    /// @notice Sets the reward per second to be distributed. Can only be called by the owner.
    /// @param _rewardPerSecond The amount of reward to be distributed per second.
    function setRewardPerSecond(uint256 _rewardPerSecond) public onlyOwner {
        require(
            _rewardPerSecond <= MAX_REWARD_PER_SECOND,
            "FantasticChef::setRewardPerSecond: > MAX_REWARD_PER_SECOND"
        );
        massUpdatePools();
        rewardPerSecond = _rewardPerSecond;
        emit LogRewardPerSecond(_rewardPerSecond);
    }

    /// @notice Set the address of rewardMinter.  Can only be called ONCE by the owner.
    /// @param _rewardMinter Address of MultiFeeDistribution contract
    function setRewardMinter(IFantasticStaking _rewardMinter) external {
        require(
            address(rewardMinter) == address(0),
            "FantasticChef::setRewardMinter: Cannot redefine rewardMinter"
        );
        rewardMinter = _rewardMinter;
    }

    /* =============== EVENTS ==================== */

    event Deposit(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
    event Withdraw(address indexed user, uint256 indexed pid, uint256 amount, address indexed to);
    event EmergencyWithdraw(
        address indexed user,
        uint256 indexed pid,
        uint256 amount,
        address indexed to
    );
    event Harvest(address indexed user, uint256 indexed pid, uint256 amount);
    event LogPoolAddition(
        uint256 indexed pid,
        uint256 allocPoint,
        IERC20 indexed lpToken,
        IRewarder indexed rewarder
    );
    event LogSetPool(
        uint256 indexed pid,
        uint256 allocPoint,
        IRewarder indexed rewarder,
        bool overwrite
    );
    event LogUpdatePool(
        uint256 indexed pid,
        uint256 lastRewardTime,
        uint256 lpSupply,
        uint256 accRewardPerShare
    );
    event LogRewardPerSecond(uint256 rewardPerSecond);
}

File 2 of 8 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev 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);
    }
}

File 3 of 8 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
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);
}

File 4 of 8 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.sol";

/**
 * @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 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");
        }
    }
}

File 5 of 8 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [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);
            }
        }
    }
}

File 6 of 8 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 7 of 8 : IFantasticStaking.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

interface IFantasticStaking {
    function addReward(address rewardsToken, address distributor) external;

    function mint(address user, uint256 amount) external;

    function notifyRewardAmount(address rewardsToken, uint256 reward) external;
}

File 8 of 8 : IRewarder.sol
// SPDX-License-Identifier: MIT

pragma solidity 0.8.4;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IRewarder {
    function onReward(
        uint256 pid,
        address user,
        address recipient,
        uint256 rewardAmount,
        uint256 newLpAmount
    ) external;

    function pendingTokens(
        uint256 pid,
        address user,
        uint256 rewardAmount
    ) external view returns (IERC20[] memory, uint256[] memory);
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"EmergencyWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Harvest","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"allocPoint","type":"uint256"},{"indexed":true,"internalType":"contract IERC20","name":"lpToken","type":"address"},{"indexed":true,"internalType":"contract IRewarder","name":"rewarder","type":"address"}],"name":"LogPoolAddition","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"rewardPerSecond","type":"uint256"}],"name":"LogRewardPerSecond","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"allocPoint","type":"uint256"},{"indexed":true,"internalType":"contract IRewarder","name":"rewarder","type":"address"},{"indexed":false,"internalType":"bool","name":"overwrite","type":"bool"}],"name":"LogSetPool","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lastRewardTime","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lpSupply","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"accRewardPerShare","type":"uint256"}],"name":"LogUpdatePool","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"uint256","name":"pid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Withdraw","type":"event"},{"inputs":[{"internalType":"uint256","name":"allocPoint","type":"uint256"},{"internalType":"contract IERC20","name":"_lpToken","type":"address"},{"internalType":"contract IRewarder","name":"_rewarder","type":"address"}],"name":"add","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"harvest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"harvestAllRewards","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"lpToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"massUpdatePools","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"address","name":"_user","type":"address"}],"name":"pendingReward","outputs":[{"internalType":"uint256","name":"pending","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"poolInfo","outputs":[{"internalType":"uint256","name":"accRewardPerShare","type":"uint256"},{"internalType":"uint256","name":"lastRewardTime","type":"uint256"},{"internalType":"uint256","name":"allocPoint","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"poolLength","outputs":[{"internalType":"uint256","name":"pools","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardMinter","outputs":[{"internalType":"contract IFantasticStaking","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerSecond","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"rewarder","outputs":[{"internalType":"contract IRewarder","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_pid","type":"uint256"},{"internalType":"uint256","name":"_allocPoint","type":"uint256"},{"internalType":"contract IRewarder","name":"_rewarder","type":"address"},{"internalType":"bool","name":"overwrite","type":"bool"}],"name":"set","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IFantasticStaking","name":"_rewardMinter","type":"address"}],"name":"setRewardMinter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rewardPerSecond","type":"uint256"}],"name":"setRewardPerSecond","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalAllocPoint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"}],"name":"updatePool","outputs":[{"components":[{"internalType":"uint256","name":"accRewardPerShare","type":"uint256"},{"internalType":"uint256","name":"lastRewardTime","type":"uint256"},{"internalType":"uint256","name":"allocPoint","type":"uint256"}],"internalType":"struct FantasticChef.PoolInfo","name":"pool","type":"tuple"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"address","name":"","type":"address"}],"name":"userInfo","outputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"int256","name":"rewardDebt","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"pid","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"to","type":"address"}],"name":"withdrawAndHarvest","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Deployed Bytecode

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.