MATIC Price: $0.99 (+1.56%)
Gas: 56 Gwei
 

Overview

MATIC Balance

Polygon PoS Chain LogoPolygon PoS Chain LogoPolygon PoS Chain Logo0 MATIC

MATIC Value

$0.00

Token Holdings

Sponsored

Transaction Hash
Method
Block
From
To
Value
Exit517167022023-12-29 23:36:1058 days 12 hrs ago1703892970IN
0xB9864B...cEf33f03
0 MATIC0.011376981.04191086
Stake516731122023-12-28 21:34:4659 days 14 hrs ago1703799286IN
0xB9864B...cEf33f03
0 MATIC0.0155377144.73738418
Exit514780002023-12-23 22:58:2764 days 13 hrs ago1703372307IN
0xB9864B...cEf33f03
0 MATIC0.010837978.31820106
Stake514385342023-12-22 22:46:4965 days 13 hrs ago1703285209IN
0xB9864B...cEf33f03
0 MATIC0.0097949188.93229723
Get Reward514329112023-12-22 19:15:2465 days 16 hrs ago1703272524IN
0xB9864B...cEf33f03
0 MATIC0.0101171490.76770467
Get Reward514140922023-12-22 7:23:0666 days 4 hrs ago1703229786IN
0xB9864B...cEf33f03
0 MATIC0.036091323.79650581
Get Reward513996202023-12-21 21:42:3966 days 14 hrs ago1703194959IN
0xB9864B...cEf33f03
0 MATIC0.01780708162.67820159
Stake513704562023-12-21 2:38:2267 days 9 hrs ago1703126302IN
0xB9864B...cEf33f03
0 MATIC0.01768555160.55740897
Get Reward513616232023-12-20 20:49:4367 days 15 hrs ago1703105383IN
0xB9864B...cEf33f03
0 MATIC0.0103134292.52861955
Get Reward513299512023-12-20 1:05:4068 days 11 hrs ago1703034340IN
0xB9864B...cEf33f03
0 MATIC0.0060563254.33536888
Stake513274262023-12-19 23:33:2568 days 12 hrs ago1703028805IN
0xB9864B...cEf33f03
0 MATIC0.0061105556.92124452
Exit512938642023-12-19 2:30:5269 days 9 hrs ago1702953052IN
0xB9864B...cEf33f03
0 MATIC0.0099551770.91438223
Get Reward512852352023-12-18 21:05:1469 days 15 hrs ago1702933514IN
0xB9864B...cEf33f03
0 MATIC0.0080884772.56713706
Stake512546282023-12-18 1:25:0570 days 10 hrs ago1702862705IN
0xB9864B...cEf33f03
0 MATIC0.01197621111.58627199
Exit511742342023-12-15 22:31:2672 days 13 hrs ago1702679486IN
0xB9864B...cEf33f03
0 MATIC0.0094536268.31490024
Withdraw511736002023-12-15 22:07:1472 days 14 hrs ago1702678034IN
0xB9864B...cEf33f03
0 MATIC0.0060593160.86761849
Get Reward511735502023-12-15 22:04:4972 days 14 hrs ago1702677889IN
0xB9864B...cEf33f03
0 MATIC0.006979262.61510988
Get Reward511629142023-12-15 15:09:3472 days 20 hrs ago1702652974IN
0xB9864B...cEf33f03
0 MATIC0.0077425569.46365595
Get Reward511356902023-12-14 21:32:0173 days 14 hrs ago1702589521IN
0xB9864B...cEf33f03
0 MATIC0.0085445476.65882828
Stake511296162023-12-14 17:21:0673 days 18 hrs ago1702574466IN
0xB9864B...cEf33f03
0 MATIC0.0113249791.00821048
Stake482531102023-10-02 21:47:02146 days 14 hrs ago1696283222IN
0xB9864B...cEf33f03
0 MATIC0.01493609122
Stake482528802023-10-02 21:38:54146 days 14 hrs ago1696282734IN
0xB9864B...cEf33f03
0 MATIC0.01668069122
Stake482505712023-10-02 20:16:17146 days 15 hrs ago1696277777IN
0xB9864B...cEf33f03
0 MATIC0.0110772187.85372213
Notify Reward Am...482504402023-10-02 20:11:39146 days 15 hrs ago1696277499IN
0xB9864B...cEf33f03
0 MATIC0.0087207880.90385966
0x60c06040482504252023-10-02 20:11:07146 days 15 hrs ago1696277467IN
 Contract Creation
0 MATIC0.1593071282.12698258

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x0c2a41...9FA03265
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
StakingRewards

Compiler Version
v0.8.17+commit.8df45f5f

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 4 : StakingRewards.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

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

error UnsuccessfulFetchOfTokenBalance();

contract StakingRewards is Ownable {
	IERC20 public immutable stakingToken;
	IERC20 public immutable rewardsToken;

	// Duration of rewards to be paid out (in seconds)
	uint256 public duration;
	// Timestamp of when the rewards finish
	uint256 public finishAt;
	// Minimum of last updated time and reward finish time
	uint256 public updatedAt;
	// Reward to be paid out per second
	uint256 public rewardRate;
	// Sum of (reward rate * dt * 1e18 / total supply)
	uint256 public rewardPerTokenStored;
	// User address => rewardPerTokenStored
	mapping(address => uint256) public userRewardPerTokenPaid;
	// User address => rewards to be claimed
	mapping(address => uint256) public rewards;

	// Total staked
	uint256 public totalSupply;
	// User address => staked amount
	mapping(address => uint256) public balanceOf;

	event RewardAdded(uint256 reward);
	event Staked(address indexed user, uint256 amount);
	event Withdrawn(address indexed user, uint256 amount);
	event RewardPaid(address indexed user, uint256 reward);
	event RewardsDurationUpdated(uint256 newDuration);
	event Recovered(address token, uint256 amount);

	constructor(address _stakingToken, address _rewardToken, uint256 _duration) {
		stakingToken = IERC20(_stakingToken);
		rewardsToken = IERC20(_rewardToken);
		setRewardsDuration(_duration);
	}

	modifier updateReward(address _account) {
		rewardPerTokenStored = rewardPerToken();
		updatedAt = lastTimeRewardApplicable();

		if (_account != address(0)) {
			rewards[_account] = earned(_account);
			userRewardPerTokenPaid[_account] = rewardPerTokenStored;
		}

		_;
	}

	function lastTimeRewardApplicable() public view returns (uint256) {
		return _min(finishAt, block.timestamp);
	}

	function rewardPerToken() public view returns (uint256) {
		if (totalSupply == 0) {
			return rewardPerTokenStored;
		}

		return rewardPerTokenStored + (rewardRate * (lastTimeRewardApplicable() - updatedAt) * 1e18) / totalSupply;
	}

	function stake(uint256 _amount) external updateReward(msg.sender) {
		require(_amount > 0, "Cannot stake 0");
		uint256 balance = getTokenBalance(address(stakingToken));
		stakingToken.transferFrom(msg.sender, address(this), _amount);
		uint256 transferredAmount = getTokenBalance(address(stakingToken)) - balance;
		balanceOf[msg.sender] += transferredAmount;
		totalSupply += transferredAmount;
		emit Staked(msg.sender, transferredAmount);
	}

	function withdraw(uint256 _amount) public updateReward(msg.sender) {
		require(_amount > 0, "Cannot withdraw 0");
		require(balanceOf[msg.sender] >= _amount, "Withdraw exceeds balance");
		balanceOf[msg.sender] -= _amount;
		totalSupply -= _amount;
		stakingToken.transfer(msg.sender, _amount);
		emit Withdrawn(msg.sender, _amount);
	}

	function getRewardForDuration() external view returns (uint256) {
		return rewardRate * duration;
	}

	function earned(address _account) public view returns (uint256) {
		return
			((balanceOf[_account] * (rewardPerToken() - userRewardPerTokenPaid[_account])) / 1e18) + rewards[_account];
	}

	function getReward() public updateReward(msg.sender) {
		uint256 reward = rewards[msg.sender];
		if (reward > 0) {
			rewards[msg.sender] = 0;
			rewardsToken.transfer(msg.sender, reward);
			emit RewardPaid(msg.sender, reward);
		}
	}

	function setRewardsDuration(uint256 _duration) public onlyOwner {
		require(
			block.timestamp > finishAt,
			"Previous rewards period must be complete before changing the duration for the new period"
		);
		duration = _duration;
		emit RewardsDurationUpdated(_duration);
	}

	function notifyRewardAmount(uint256 _amount) external onlyOwner updateReward(address(0)) {
		if (block.timestamp >= finishAt) {
			rewardRate = _amount / duration;
		} else {
			uint256 remainingRewards = (finishAt - block.timestamp) * rewardRate;
			rewardRate = (_amount + remainingRewards) / duration;
		}

		require(rewardRate > 0, "reward rate = 0");
		require(rewardRate * duration <= rewardsToken.balanceOf(address(this)), "Provided reward too high");

		finishAt = block.timestamp + duration;
		updatedAt = block.timestamp;
		emit RewardAdded(_amount);
	}

	function exit() external {
		withdraw(balanceOf[msg.sender]);
		getReward();
	}

	// Added to support recovering LP Rewards from other systems such as BAL to be distributed to holders
	function recoverERC20(address tokenAddress, uint256 tokenAmount) external onlyOwner {
		require(tokenAddress != address(stakingToken), "Cannot withdraw the staking token");
		IERC20(tokenAddress).transfer(msg.sender, tokenAmount);
		emit Recovered(tokenAddress, tokenAmount);
	}

	function getTokenBalance(address token) internal view returns (uint256) {
		(bool success, bytes memory encodedBalance) = token.staticcall(
			abi.encodeWithSelector(IERC20.balanceOf.selector, address(this))
		);

		if (success && encodedBalance.length >= 32) {
			return abi.decode(encodedBalance, (uint256));
		}
		revert UnsuccessfulFetchOfTokenBalance();
	}

	function _min(uint256 x, uint256 y) private pure returns (uint256) {
		return x <= y ? x : y;
	}
}

File 2 of 4 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 4 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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);
}

File 4 of 4 : 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;
    }
}

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

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_stakingToken","type":"address"},{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"uint256","name":"_duration","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"UnsuccessfulFetchOfTokenBalance","type":"error"},{"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":false,"internalType":"address","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Recovered","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"newDuration","type":"uint256"}],"name":"RewardsDurationUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"duration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"exit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"finishAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getRewardForDuration","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"notifyRewardAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokenAmount","type":"uint256"}],"name":"recoverERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardPerTokenStored","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_duration","type":"uint256"}],"name":"setRewardsDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","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":[],"name":"updatedAt","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]

Deployed Bytecode

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