Contract

Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

contract TwitterRewards is Ownable {
    IERC20 public rewardToken;
    uint256 public cooldownTime;
    address public backend;

    mapping(address => uint256) private lastClaimTime;
    mapping(string => bool) public rewardsClaimed;

    event RewardClaimed(address indexed user, uint256 amount, string rewardId);

    constructor(IERC20 _rewardToken, uint256 _cooldownTime, address _backend) {
        rewardToken = _rewardToken;
        cooldownTime = _cooldownTime;
        backend = _backend;
    }

    receive() external payable {}

    function setCooldownTime(uint256 _cooldownTime) external onlyOwner {
        cooldownTime = _cooldownTime;
    }

    function setBackend(address _backend) external onlyOwner {
        backend = _backend;
    }

    function claimReward(uint256 amount, bytes memory signature, string memory rewardId) external {
        address user = msg.sender;

        require(rewardToken.balanceOf(address(this)) >= amount, "Insufficient tokens in the contract.");
        require(!rewardsClaimed[rewardId], "Reward has already been claimed.");
        require(block.timestamp >= lastClaimTime[user] + cooldownTime, "Cooldown period not over.");

        // Verify the signed message
        bytes32 hash = keccak256(abi.encodePacked(user, amount, rewardId));
        bytes32 prefixedHash = ECDSA.toEthSignedMessageHash(hash);
        address signer = ECDSA.recover(prefixedHash, signature);

        require(signer == backend, "Invalid signature.");

        lastClaimTime[user] = block.timestamp;
        rewardsClaimed[rewardId] = true;

        rewardToken.transfer(user, amount);

        emit RewardClaimed(user, amount, rewardId);
    }

    function emergencyWithdraw(address token, uint256 amount) external onlyOwner {
        if (token == address(0)) {
            payable(owner()).transfer(amount);
        } else {
            IERC20(token).transfer(owner(), amount);
        }
    }
}

// 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);
    }
}

// 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);
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract IERC20","name":"_rewardToken","type":"address"},{"internalType":"uint256","name":"_cooldownTime","type":"uint256"},{"internalType":"address","name":"_backend","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"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":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"string","name":"rewardId","type":"string"}],"name":"RewardClaimed","type":"event"},{"inputs":[],"name":"backend","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"signature","type":"bytes"},{"internalType":"string","name":"rewardId","type":"string"}],"name":"claimReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"cooldownTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"rewardToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"rewardsClaimed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_backend","type":"address"}],"name":"setBackend","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_cooldownTime","type":"uint256"}],"name":"setCooldownTime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

00000000000000000000000050bbed713594c8f4d1ec0cb1e1c647bffa289c5f00000000000000000000000000000000000000000000000000000000000007080000000000000000000000003aeb8d5399b344aa66cf80dde58130a79789d74e

-----Decoded View---------------
Arg [0] : _rewardToken (address): 0x50Bbed713594C8F4D1Ec0Cb1e1c647bFfa289c5F
Arg [1] : _cooldownTime (uint256): 1800
Arg [2] : _backend (address): 0x3aeB8D5399b344Aa66cF80DdE58130A79789d74E

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000050bbed713594c8f4d1ec0cb1e1c647bffa289c5f
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000708
Arg [2] : 0000000000000000000000003aeb8d5399b344aa66cf80dde58130a79789d74e