false
false
0
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Contract Address Details

0x7c464A0AB1f5ebf3E2dCccfec7EF41D02ED7a2f4

Contract Name
StakingRewards
Creator
0x077675–fb67cc at 0x7cf05d–85a85a
Balance
0 ETH
Tokens
Fetching tokens...
Transactions
Fetching transactions...
Transfers
Fetching transfers...
Gas Used
Fetching gas used...
Last Balance Update
518265
Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
Contract name:
StakingRewards




Optimization enabled
true
Compiler version
v0.8.12+commit.f00d7308




Optimization runs
10
EVM Version
london




Verified at
2024-06-07T13:15:58.642036Z

contracts/Staking/StakingRewards.sol

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.12;

// Inheritance
import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
import { IERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
import { SafeERC20Upgradeable } from "@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol";
import { IERC20Metadata } from "@openzeppelin/contracts/interfaces/IERC20Metadata.sol";
import "../interfaces/IStakingRewards.sol";

/// @title Staking reward contract
/// @author Steer Protocol
/// @dev This contract is used to reward stakers for their staking time.
contract StakingRewards is
    IStakingRewards,
    Initializable,
    OwnableUpgradeable,
    UUPSUpgradeable
{
    using SafeERC20Upgradeable for IERC20Upgradeable;

    // Storage

    // Constants
    uint256 public constant PRECISION = 1e18;
    uint256 public constant SECONDS_IN_YEAR = 31_536_000;
    uint256 public constant RATE_PRECISION = 100_00; //Precision for reward calculaion

    // Mapping of Pool details to pool id
    mapping(uint256 => Pool) public pools;

    // Total no. of pools created
    uint256 public totalPools;

    //Mapping of user details per pool
    mapping(uint256 => mapping(address => UserInfo)) public userInfoPerPool;

    // Mapping of total rewards allocated currently for a pool
    mapping(uint256 => uint256) public totalRewardsPerPool;

    // Mapping that returns the state of pool by passing pool id, true means staking is paused and false means staking is allowed
    mapping(uint256 => bool) public isPaused;

    // Mapping that returns pending rewards for a particular user for a particular pool
    mapping(address => mapping(uint256 => uint256)) public pendingRewards;

    /// @custom:oz-upgrades-unsafe-allow constructor
    constructor() initializer() {}

    // External Functions

    /// @dev To stake tokens
    /// @param amount The number of tokens to be staked.
    /// @param poolId The id of the pool in which tokens should be staked.
    function stake(uint256 amount, uint256 poolId) external {
        _stake(msg.sender, amount, poolId);
    }

    /// @dev To stake tokens
    /// @param user The address that stake tokens for.
    /// @param amount The number of tokens to be staked.
    /// @param poolId The id of the pool in which tokens should be staked.
    function stakeFor(address user, uint256 amount, uint256 poolId) external {
        _stake(user, amount, poolId);
    }

    /// @dev To unstake staked tokens.
    /// @param poolId The id of pool from which the tokens whould be unstaked.
    function unstake(uint256 poolId) external {
        Pool memory pool = pools[poolId];
        UserInfo storage userInfo = userInfoPerPool[poolId][msg.sender];
        uint256 amount = userInfo.balance;
        require(amount != 0, "0 Stake");
        pools[poolId].totalAmount -= amount;
        if (block.timestamp > pool.end) {
            claimReward(poolId, pool, userInfo);
        } else {
            userInfo.lastRewarded = 0;
            userInfo.rewards = 0;
            userInfo.balance = 0;
        }
        IERC20Upgradeable(pool.stakingToken).safeTransfer(msg.sender, amount);
        emit Withdrawn(msg.sender, amount, poolId);
    }

    /// @dev To claim the pending rewards
    /// @param poolId The id of the pool from which the pending rewards should be claimed
    function claimPendingRewards(uint256 poolId) external {
        uint256 pending = pendingRewards[msg.sender][poolId];
        pendingRewards[msg.sender][poolId] = 0;
        totalRewardsPerPool[poolId] -= pending;
        IERC20Upgradeable(pools[poolId].rewardToken).safeTransfer(
            msg.sender,
            pending
        );
    }

    // Internal Functions

    function claimReward(
        uint256 poolId,
        Pool memory pool,
        UserInfo storage userInfo
    ) internal {
        updateReward(pool, userInfo);
        uint256 reward = userInfo.rewards;
        userInfo.rewards = 0;
        userInfo.balance = 0;
        userInfo.lastRewarded = 0;
        uint256 totalRewards = totalRewardsPerPool[poolId];
        if (totalRewards >= reward) {
            totalRewardsPerPool[poolId] = totalRewards - reward;
            emit RewardPaid(msg.sender, poolId, reward);
            IERC20Upgradeable(pool.rewardToken).safeTransfer(
                msg.sender,
                reward
            );
        } else {
            pendingRewards[msg.sender][poolId] = reward - totalRewards;
            totalRewardsPerPool[poolId] = 0;
            emit RewardPaid(msg.sender, poolId, totalRewards);
            IERC20Upgradeable(pool.rewardToken).safeTransfer(
                msg.sender,
                totalRewards
            );
        }
    }

    function updateReward(
        Pool memory pool,
        UserInfo storage userInfo
    ) internal {
        uint256 stakeTime;
        if (block.timestamp > pool.end) stakeTime = pool.end;
        else stakeTime = block.timestamp;
        uint256 balance = userInfo.balance;
        uint256 lastReward;
        if (balance != 0) {
            lastReward =
                (balance *
                    (((stakeTime - userInfo.lastRewarded) *
                        (pool.rewardRate * PRECISION)) /
                        (RATE_PRECISION * SECONDS_IN_YEAR))) /
                PRECISION;
            userInfo.rewards += lastReward;
        }
        userInfo.lastRewarded = stakeTime;
    }

    /// @dev To stake tokens
    /// @param user The address that stake tokens for.
    /// @param amount The number of tokens to be staked.
    /// @param poolId The id of the pool in which tokens should be staked.
    function _stake(address user, uint256 amount, uint256 poolId) internal {
        // Validate
        require(amount > 0, "Cannot stake 0");
        Pool memory pool = pools[poolId];
        UserInfo storage userInfo = userInfoPerPool[poolId][user];
        require(pool.start <= block.timestamp, "Staking not started");
        require(!isPaused[poolId], "Staking Paused");
        require(block.timestamp < pool.end, "Staking Period is over");
        // Update values before staking
        updateReward(pool, userInfo);

        // Stake
        userInfo.balance += amount;
        pools[poolId].totalAmount += amount;
        IERC20Upgradeable(pool.stakingToken).safeTransferFrom(
            msg.sender,
            address(this),
            amount
        );
        emit Staked(user, amount, poolId);
    }

    //Public functions
    function initialize() public initializer {
        __UUPSUpgradeable_init();
        __Ownable_init();
    }

    // View Functions

    /// @dev To get rewards for a particular address for a particular pool
    /// @param account The address of the account whose reward is to be fetched
    /// @param poolId The id of the pool from which rewards for the account needs to be fetched
    function getRewardsForAPool(
        address account,
        uint256 poolId
    ) external view returns (uint256) {
        Pool memory pool = pools[poolId];
        UserInfo memory userInfo = userInfoPerPool[poolId][account];
        uint256 stakeTime;
        if (block.timestamp > pool.end) stakeTime = pool.end;
        else stakeTime = block.timestamp;
        uint256 currentReward = (userInfo.balance *
            (((stakeTime - userInfo.lastRewarded) *
                (pool.rewardRate * PRECISION)) /
                (RATE_PRECISION * SECONDS_IN_YEAR))) / PRECISION;
        currentReward += userInfo.rewards;
        return currentReward;
    }

    /// @dev To get the pool for given id
    /// @return Pool which has the details for every pool
    function getPool(uint256 poolId) public view returns (Pool memory) {
        return pools[poolId];
    }

    /// @dev To get the details for all pools
    /// @return pools which has the details for every pool
    function getPools() public view returns (Pool[] memory, string[] memory) {
        uint256 _totalPools = totalPools;
        Pool[] memory _pools = new Pool[](_totalPools);
        string[] memory symbols = new string[](_totalPools);
        for (uint256 i; i != _totalPools; ++i) {
            _pools[i] = pools[i];
            string memory stakingTokenSymbol = IERC20Metadata(
                _pools[i].stakingToken
            ).symbol();
            string memory rewardTokenSymbol = IERC20Metadata(
                _pools[i].rewardToken
            ).symbol();
            symbols[i] = string(
                abi.encodePacked(stakingTokenSymbol, "/", rewardTokenSymbol)
            );
        }
        return (_pools, symbols);
    }

    function getBalances(
        address user
    ) external view returns (uint256[] memory) {
        uint256 _totalPools = totalPools;
        uint256[] memory _balances = new uint256[](_totalPools);
        for (uint256 i; i != _totalPools; ++i)
            _balances[i] = userInfoPerPool[i][user].balance;
        return _balances;
    }

    //Only Owner functions

    function _authorizeUpgrade(
        address newImplementation
    ) internal override onlyOwner {}

    /// @dev To create a staking pool
    /// @param stakingToken Address of the token that will be staked
    /// @param rewardToken Address of the token that will be given as reward
    /// @param rewardRate Rate at which the rewards will be calculated yearly and then multiplied by 100
    /// @param start Start time of the staking pool
    /// @param end Ending time for the staking pool
    function createPool(
        address stakingToken,
        address rewardToken,
        uint256 rewardRate,
        uint256 start,
        uint256 end
    ) external onlyOwner {
        uint256 _totalPools = totalPools;
        require(start < end, "TIME");
        require(stakingToken != rewardToken, "SAME");
        pools[_totalPools] = Pool({
            stakingToken: stakingToken,
            rewardToken: rewardToken,
            rewardRate: rewardRate * 100,
            totalAmount: 0,
            start: start,
            end: end
        });
        totalPools = _totalPools + 1;
    }

    /// @dev To pause or resume a particular staking pool
    /// @param poolId The id of the staking pool that should be paused or resumed
    /// @param pause The boolean where passing true means pause the pool
    ///              and passing false means resume the pool
    function setJobState(uint256 poolId, bool pause) external onlyOwner {
        isPaused[poolId] = pause;
    }

    /// @dev To deposit reward tokens that will be given to the stakers.
    /// @param poolId The id of the pool in which rewards should be allocated
    /// @param amount The value of tokens that should be added to give out as rewards.
    function depositRewards(uint256 poolId, uint256 amount) external {
        totalRewardsPerPool[poolId] += amount;
        emit RewardsDeposited(msg.sender, poolId, amount);
        IERC20Upgradeable(pools[poolId].rewardToken).safeTransferFrom(
            msg.sender,
            address(this),
            amount
        );
    }

    /// @dev To withdraw the extra rewards that remains on the contract
    ///      and can only be called by owner of this contract.
    /// @param poolId The id of the pool in which rewards should be withdrawn
    /// @param amount The value of tokens that should be removed from the contract.
    /// @param receiver The address where the withdrawn tokens should be sent
    function withdrawRewards(
        uint256 poolId,
        uint256 amount,
        address receiver
    ) external onlyOwner {
        // Reduce totalRewards by amount.
        // Owner cannot withdraw more rewards than they have deposited.
        totalRewardsPerPool[poolId] -= amount;
        emit RewardsWithdrawn(amount, poolId);
        IERC20Upgradeable(pools[poolId].rewardToken).safeTransfer(
            receiver,
            amount
        );
    }
}
        

@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}
          

@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol

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

pragma solidity ^0.8.0;

import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.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 OwnableUpgradeable is Initializable, ContextUpgradeable {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    function __Ownable_init() internal onlyInitializing {
        __Context_init_unchained();
        __Ownable_init_unchained();
    }

    function __Ownable_init_unchained() internal onlyInitializing {
        _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);
    }
    uint256[49] private __gap;
}
          

@openzeppelin/contracts-upgradeable/proxy/ERC1967/ERC1967UpgradeUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/ERC1967/ERC1967Upgrade.sol)

pragma solidity ^0.8.2;

import "../beacon/IBeaconUpgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";

/**
 * @dev This abstract contract provides getters and event emitting update functions for
 * https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
 *
 * _Available since v4.1._
 *
 * @custom:oz-upgrades-unsafe-allow delegatecall
 */
abstract contract ERC1967UpgradeUpgradeable is Initializable {
    function __ERC1967Upgrade_init() internal onlyInitializing {
        __ERC1967Upgrade_init_unchained();
    }

    function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
    }
    // This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
    bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;

    /**
     * @dev Storage slot with the address of the current implementation.
     * This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;

    /**
     * @dev Emitted when the implementation is upgraded.
     */
    event Upgraded(address indexed implementation);

    /**
     * @dev Returns the current implementation address.
     */
    function _getImplementation() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 implementation slot.
     */
    function _setImplementation(address newImplementation) private {
        require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
        StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
    }

    /**
     * @dev Perform implementation upgrade
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeTo(address newImplementation) internal {
        _setImplementation(newImplementation);
        emit Upgraded(newImplementation);
    }

    /**
     * @dev Perform implementation upgrade with additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCall(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        _upgradeTo(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }
    }

    /**
     * @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
     *
     * Emits an {Upgraded} event.
     */
    function _upgradeToAndCallSecure(
        address newImplementation,
        bytes memory data,
        bool forceCall
    ) internal {
        address oldImplementation = _getImplementation();

        // Initial upgrade and setup call
        _setImplementation(newImplementation);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(newImplementation, data);
        }

        // Perform rollback test if not already in progress
        StorageSlotUpgradeable.BooleanSlot storage rollbackTesting = StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT);
        if (!rollbackTesting.value) {
            // Trigger rollback using upgradeTo from the new implementation
            rollbackTesting.value = true;
            _functionDelegateCall(
                newImplementation,
                abi.encodeWithSignature("upgradeTo(address)", oldImplementation)
            );
            rollbackTesting.value = false;
            // Check rollback was effective
            require(oldImplementation == _getImplementation(), "ERC1967Upgrade: upgrade breaks further upgrades");
            // Finally reset to the new implementation and log the upgrade
            _upgradeTo(newImplementation);
        }
    }

    /**
     * @dev Storage slot with the admin of the contract.
     * This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
     * validated in the constructor.
     */
    bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;

    /**
     * @dev Emitted when the admin account has changed.
     */
    event AdminChanged(address previousAdmin, address newAdmin);

    /**
     * @dev Returns the current admin.
     */
    function _getAdmin() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
    }

    /**
     * @dev Stores a new address in the EIP1967 admin slot.
     */
    function _setAdmin(address newAdmin) private {
        require(newAdmin != address(0), "ERC1967: new admin is the zero address");
        StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
    }

    /**
     * @dev Changes the admin of the proxy.
     *
     * Emits an {AdminChanged} event.
     */
    function _changeAdmin(address newAdmin) internal {
        emit AdminChanged(_getAdmin(), newAdmin);
        _setAdmin(newAdmin);
    }

    /**
     * @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
     * This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
     */
    bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;

    /**
     * @dev Emitted when the beacon is upgraded.
     */
    event BeaconUpgraded(address indexed beacon);

    /**
     * @dev Returns the current beacon.
     */
    function _getBeacon() internal view returns (address) {
        return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
    }

    /**
     * @dev Stores a new beacon in the EIP1967 beacon slot.
     */
    function _setBeacon(address newBeacon) private {
        require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
        require(
            AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
            "ERC1967: beacon implementation is not a contract"
        );
        StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
    }

    /**
     * @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
     * not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
     *
     * Emits a {BeaconUpgraded} event.
     */
    function _upgradeBeaconToAndCall(
        address newBeacon,
        bytes memory data,
        bool forceCall
    ) internal {
        _setBeacon(newBeacon);
        emit BeaconUpgraded(newBeacon);
        if (data.length > 0 || forceCall) {
            _functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
        }
    }

    /**
     * @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) private returns (bytes memory) {
        require(AddressUpgradeable.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 AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
    }
    uint256[50] private __gap;
}
          

@openzeppelin/contracts-upgradeable/proxy/beacon/IBeaconUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)

pragma solidity ^0.8.0;

/**
 * @dev This is the interface that {BeaconProxy} expects of its beacon.
 */
interface IBeaconUpgradeable {
    /**
     * @dev Must return an address that can be used as a delegate call target.
     *
     * {BeaconProxy} will check that this address is a contract.
     */
    function implementation() external view returns (address);
}
          

@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)

pragma solidity ^0.8.0;

import "../../utils/AddressUpgradeable.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
 * initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() initializer {}
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    bool private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Modifier to protect an initializer function from being invoked twice.
     */
    modifier initializer() {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
        // contract may have been reentered.
        require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");

        bool isTopLevelCall = !_initializing;
        if (isTopLevelCall) {
            _initializing = true;
            _initialized = true;
        }

        _;

        if (isTopLevelCall) {
            _initializing = false;
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} modifier, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    function _isConstructor() private view returns (bool) {
        return !AddressUpgradeable.isContract(address(this));
    }
}
          

@openzeppelin/contracts/token/ERC20/IERC20.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}
          

@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/UUPSUpgradeable.sol)

pragma solidity ^0.8.0;

import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";

/**
 * @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
 * {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
 *
 * A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
 * reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
 * `UUPSUpgradeable` with a custom implementation of upgrades.
 *
 * The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
 *
 * _Available since v4.1._
 */
abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
    function __UUPSUpgradeable_init() internal onlyInitializing {
        __ERC1967Upgrade_init_unchained();
        __UUPSUpgradeable_init_unchained();
    }

    function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
    }
    /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
    address private immutable __self = address(this);

    /**
     * @dev Check that the execution is being performed through a delegatecall call and that the execution context is
     * a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
     * for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
     * function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
     * fail.
     */
    modifier onlyProxy() {
        require(address(this) != __self, "Function must be called through delegatecall");
        require(_getImplementation() == __self, "Function must be called through active proxy");
        _;
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeTo(address newImplementation) external virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallSecure(newImplementation, new bytes(0), false);
    }

    /**
     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
     * encoded in `data`.
     *
     * Calls {_authorizeUpgrade}.
     *
     * Emits an {Upgraded} event.
     */
    function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
        _authorizeUpgrade(newImplementation);
        _upgradeToAndCallSecure(newImplementation, data, true);
    }

    /**
     * @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
     * {upgradeTo} and {upgradeToAndCall}.
     *
     * Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
     *
     * ```solidity
     * function _authorizeUpgrade(address) internal override onlyOwner {}
     * ```
     */
    function _authorizeUpgrade(address newImplementation) internal virtual;
    uint256[50] private __gap;
}
          

@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20Upgradeable {
    /**
     * @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 `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);
}
          

@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol

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

pragma solidity ^0.8.0;

import "../IERC20Upgradeable.sol";
import "../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {
    using AddressUpgradeable for address;

    function safeTransfer(
        IERC20Upgradeable token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(
        IERC20Upgradeable 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(IERC20Upgradeable 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");
        }
    }
}
          

@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @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;
        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");

        (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 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);
            }
        }
    }
}
          

@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol

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

pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";

/**
 * @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 ContextUpgradeable is Initializable {
    function __Context_init() internal onlyInitializing {
        __Context_init_unchained();
    }

    function __Context_init_unchained() internal onlyInitializing {
    }
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
    uint256[50] private __gap;
}
          

@openzeppelin/contracts-upgradeable/utils/StorageSlotUpgradeable.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlotUpgradeable {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}
          

@openzeppelin/contracts/interfaces/IERC20Metadata.sol

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../token/ERC20/extensions/IERC20Metadata.sol";
          

contracts/interfaces/IStakingRewards.sol

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.12;

interface IStakingRewards {
    // Structs

    /// stakingToken : Address of the token that will be staked
    /// rewardToken : Address of the token that will be given as reward
    /// rewardRate : Rate at which the rewards will be calculated,
    ///             reward rate will be multiplied by 100 for decimal precision,
    ///             for e.g. 6000 means 60%/year, 1000 means 10%/year
    /// start : Start time of the staking pool
    /// end : Ending time for the staking pool
    struct Pool {
        address stakingToken;
        address rewardToken;
        uint256 rewardRate;
        uint256 totalAmount;
        uint256 start;
        uint256 end;
    }

    ///balance : Staked balance of a user
    ///lastRewarded : The time at which a user was last rewarded
    ///rewards : Amount of rewards accrued by a user(Note - This is not a track of
    /// real time rewards,this is a track of rewards till the last time user interacted with
    /// the last rewarded variable)
    struct UserInfo {
        uint256 balance;
        uint256 lastRewarded;
        uint256 rewards;
    }

    // Events

    event Staked(address indexed user, uint256 amount, uint256 poolId);
    event Withdrawn(address indexed user, uint256 amount, uint256 poolId);
    event RewardPaid(address indexed user, uint256 poolId, uint256 reward);
    event RewardsDeposited(address depositor, uint256 poolId, uint256 amount);
    event RewardsWithdrawn(uint256 amount, uint256 poolId);

    // Functions

    function createPool(
        address stakingToken,
        address rewardToken,
        uint256 rewardRate,
        uint256 start,
        uint256 end
    ) external;

    function stake(uint256 amount, uint256 poolId) external;

    function stakeFor(address user, uint256 amount, uint256 poolId) external;

    function unstake(uint256 poolId) external;

    function depositRewards(uint256 poolId, uint256 amount) external;

    function withdrawRewards(
        uint256 poolId,
        uint256 amount,
        address receiver
    ) external;

    function setJobState(uint256 poolId, bool pause) external;

    function claimPendingRewards(uint256 poolId) external;

    function getRewardsForAPool(
        address account,
        uint256 poolId
    ) external view returns (uint256);

    function getPools()
        external
        view
        returns (Pool[] memory pools, string[] memory symbols);

    function getPool(uint256 poolId) external view returns (Pool memory pool);
}
          

Compiler Settings

{"outputSelection":{"*":{"*":["*"],"":["*"]}},"optimizer":{"runs":10,"enabled":true},"metadata":{"useLiteralContent":true,"bytecodeHash":"ipfs"},"libraries":{},"evmVersion":"london"}
              

Contract ABI

[{"type":"constructor","stateMutability":"nonpayable","inputs":[]},{"type":"event","name":"AdminChanged","inputs":[{"type":"address","name":"previousAdmin","internalType":"address","indexed":false},{"type":"address","name":"newAdmin","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"BeaconUpgraded","inputs":[{"type":"address","name":"beacon","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"RewardPaid","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"poolId","internalType":"uint256","indexed":false},{"type":"uint256","name":"reward","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"RewardsDeposited","inputs":[{"type":"address","name":"depositor","internalType":"address","indexed":false},{"type":"uint256","name":"poolId","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"RewardsWithdrawn","inputs":[{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint256","name":"poolId","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Staked","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint256","name":"poolId","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"Upgraded","inputs":[{"type":"address","name":"implementation","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Withdrawn","inputs":[{"type":"address","name":"user","internalType":"address","indexed":true},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false},{"type":"uint256","name":"poolId","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"PRECISION","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"RATE_PRECISION","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"SECONDS_IN_YEAR","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"claimPendingRewards","inputs":[{"type":"uint256","name":"poolId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"createPool","inputs":[{"type":"address","name":"stakingToken","internalType":"address"},{"type":"address","name":"rewardToken","internalType":"address"},{"type":"uint256","name":"rewardRate","internalType":"uint256"},{"type":"uint256","name":"start","internalType":"uint256"},{"type":"uint256","name":"end","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"depositRewards","inputs":[{"type":"uint256","name":"poolId","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256[]","name":"","internalType":"uint256[]"}],"name":"getBalances","inputs":[{"type":"address","name":"user","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple","name":"","internalType":"struct IStakingRewards.Pool","components":[{"type":"address","name":"stakingToken","internalType":"address"},{"type":"address","name":"rewardToken","internalType":"address"},{"type":"uint256","name":"rewardRate","internalType":"uint256"},{"type":"uint256","name":"totalAmount","internalType":"uint256"},{"type":"uint256","name":"start","internalType":"uint256"},{"type":"uint256","name":"end","internalType":"uint256"}]}],"name":"getPool","inputs":[{"type":"uint256","name":"poolId","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"tuple[]","name":"","internalType":"struct IStakingRewards.Pool[]","components":[{"type":"address","name":"stakingToken","internalType":"address"},{"type":"address","name":"rewardToken","internalType":"address"},{"type":"uint256","name":"rewardRate","internalType":"uint256"},{"type":"uint256","name":"totalAmount","internalType":"uint256"},{"type":"uint256","name":"start","internalType":"uint256"},{"type":"uint256","name":"end","internalType":"uint256"}]},{"type":"string[]","name":"","internalType":"string[]"}],"name":"getPools","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"getRewardsForAPool","inputs":[{"type":"address","name":"account","internalType":"address"},{"type":"uint256","name":"poolId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"initialize","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"isPaused","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"pendingRewards","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"stakingToken","internalType":"address"},{"type":"address","name":"rewardToken","internalType":"address"},{"type":"uint256","name":"rewardRate","internalType":"uint256"},{"type":"uint256","name":"totalAmount","internalType":"uint256"},{"type":"uint256","name":"start","internalType":"uint256"},{"type":"uint256","name":"end","internalType":"uint256"}],"name":"pools","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setJobState","inputs":[{"type":"uint256","name":"poolId","internalType":"uint256"},{"type":"bool","name":"pause","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"stake","inputs":[{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"poolId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"stakeFor","inputs":[{"type":"address","name":"user","internalType":"address"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"uint256","name":"poolId","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalPools","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalRewardsPerPool","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"unstake","inputs":[{"type":"uint256","name":"poolId","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"upgradeTo","inputs":[{"type":"address","name":"newImplementation","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"upgradeToAndCall","inputs":[{"type":"address","name":"newImplementation","internalType":"address"},{"type":"bytes","name":"data","internalType":"bytes"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"balance","internalType":"uint256"},{"type":"uint256","name":"lastRewarded","internalType":"uint256"},{"type":"uint256","name":"rewards","internalType":"uint256"}],"name":"userInfoPerPool","inputs":[{"type":"uint256","name":"","internalType":"uint256"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdrawRewards","inputs":[{"type":"uint256","name":"poolId","internalType":"uint256"},{"type":"uint256","name":"amount","internalType":"uint256"},{"type":"address","name":"receiver","internalType":"address"}]}]
              

Contract Creation Code

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