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合同元数据
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0.8.11+commit.d7f03943
语言
Solidity
合同源代码
文件 1 的 3:ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}
合同源代码
文件 2 的 3:SafeMath.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}
合同源代码
文件 3 的 3:staking_contractV7_2.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8;

import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";


contract StakingV7_2 is ReentrancyGuard {
    using SafeMath for uint256;

    address public owner;
    address public stakevault;
    IERC20 public immutable stakingToken;
    IERC20 public immutable rewardsToken;
    uint256 public stakingTokenDecimals;
    uint256 public rewardTokenDecimals;
    string public stakingTokenName;
    string public rewardTokenName;
    string public contractType;

    uint256 public duration;
    uint256 public finishAt;
    uint256 public updatedAt;

    //claim rules
    uint256 public phase1;
    uint256 public phase2;
    uint256 public phase3;
    uint256 public phase4;

    uint256 public percentage1;
    uint256 public percentage2;
    uint256 public percentage3;
    
    // Reward to be paid out per second
    uint256 public rewardRate;
    // Sum of (reward rate * dt * rewardTokenDecimals / total supply)
    uint256 public rewardPerTokenStored;
    // User address => rewardPerTokenStored
    mapping(address => uint256) public userRewardPerTokenPaid;
    // User address => rewards to be claimed since "updateReward"
    mapping(address => uint256) public rewards;

    // User Info
    mapping(address => uint256) public balanceOf;
    mapping(address => uint256) public claimedRewards;
    mapping(address => uint256) public userStakeUpdateTime;
    mapping(address => uint256) public lastClaimedTime;
    mapping(address => uint256) public userLastTimeStaked;


    // Total staked amount
    uint256 public totalSupply;
    // Total claimed amount
    uint256 public totalClaimed;
    // Total users
    uint256 public totalUsers;



    constructor(address _stakevault, address _stakingToken, address _rewardToken, uint256 _stakingTokenDecimals, uint256 _rewardTokenDecimals, string memory _stakingTokenName, string memory _rewardTokenName, string memory _contractType) {
        require(
            keccak256(bytes(_contractType)) == keccak256(bytes("stake")) || 
            keccak256(bytes(_contractType)) == keccak256(bytes("farm")),
            "Only use stake or farm as contractType"
        );
        
        owner = msg.sender;
        stakevault = _stakevault;
        stakingToken = IERC20(_stakingToken);
        rewardsToken = IERC20(_rewardToken);
        stakingTokenDecimals = _stakingTokenDecimals;
        rewardTokenDecimals = _rewardTokenDecimals;
        stakingTokenName = _stakingTokenName;
        rewardTokenName = _rewardTokenName;
        contractType = _contractType;
    }

    // Modifier: Only allows the contract owner to execute the function
    modifier onlyOwner() {
        require(msg.sender == owner, "not authorized");
        _;
    }
    function updateRewardInternal(address _account) internal {
        rewardPerTokenStored = rewardPerToken();
        updatedAt = lastTimeRewardApplicable();

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

    // Stakes the specified amount of tokens
    function stake(uint256 _amount) external nonReentrant {
        updateRewardInternal(msg.sender);

        userLastTimeStaked[msg.sender] = block.timestamp;

        require(_amount > 0, "amount = 0");
        if (balanceOf[msg.sender] == 0) {
            userStakeUpdateTime[msg.sender] = block.timestamp;
            totalUsers += 1;
        }
        //transfer from RewardVault
        stakingToken.transferFrom(msg.sender, address(this), _amount);
        //update info
        balanceOf[msg.sender] = balanceOf[msg.sender].add(_amount);
        totalSupply = totalSupply.add(_amount);

        updateRewardInternal(msg.sender);
    }

    // Withdraws the specified amount of tokens
    function withdraw(uint256 _amount) external nonReentrant {
        updateRewardInternal(msg.sender);

        require(_amount > 0, "amount = 0");
        require(balanceOf[msg.sender] >= _amount, "amount > balance");
        stakingToken.transfer(msg.sender, _amount);
        //update info
        balanceOf[msg.sender] = balanceOf[msg.sender].sub(_amount);
        totalSupply = totalSupply.sub(_amount);

        updateRewardInternal(msg.sender);
    

        if (balanceOf[msg.sender] == 0) {
            userStakeUpdateTime[msg.sender] = 0;
            totalUsers -= 1;
        }
    }

    // Claims the rewards for the sender
    function getReward() external nonReentrant {
        updateRewardInternal(msg.sender);

        require(rewards[msg.sender] > 0, "No rewards to claim.");
        
        uint256 reward = rewards[msg.sender];
        uint256 userStakeEndTime = userLastTimeStaked[msg.sender] + phase4;

        if (block.timestamp < userStakeEndTime) {
            if (block.timestamp >= userLastTimeStaked[msg.sender] + phase3) {
                reward = (reward * percentage3) / 100;
            } else if (block.timestamp >= userLastTimeStaked[msg.sender] + phase2) {
                reward = (reward * percentage2) / 100;
            } else if (block.timestamp >= userLastTimeStaked[msg.sender] + phase1) {
                reward = (reward * percentage1) / 100;
            } else {
                revert("You cannot claim yet");
            }
        }
        rewardsToken.transferFrom(stakevault, msg.sender, reward);

        //update info
        rewards[msg.sender] = 0;
        claimedRewards[msg.sender] += reward;
        totalClaimed += reward;

        lastClaimedTime[msg.sender] = block.timestamp;
    }

    // Calculates the reward per token
    function rewardPerToken() public view returns (uint256) {
        if (totalSupply == 0) {
            return rewardPerTokenStored;
        }

        return rewardPerTokenStored.add(
            rewardRate.mul(lastTimeRewardApplicable().sub(updatedAt)).mul(10**rewardTokenDecimals).div(totalSupply)
        );
    }

    // Calculates the total earnings of an account
    function earned(address _account) public view returns (uint256) {
        return balanceOf[_account].mul(rewardPerToken().sub(userRewardPerTokenPaid[_account])).div(10**rewardTokenDecimals).add(rewards[_account]);
    }

    // Sets the duration of rewards distribution
    function setRewardsDurationDays(uint256 _durationInDays) external onlyOwner {
        require(finishAt < block.timestamp, "reward duration not finished");
        duration = _durationInDays * 1 days;
    }

    // Notifies the contract about the amount of rewards to be distributed
    function notifyRewardAmount(uint256 _amount) external onlyOwner {
        updateRewardInternal(address(0));

        // Reward duration not started or expired. Set the duration first.
        if (block.timestamp > finishAt) {
            rewardRate = _amount.div(duration);
        } else {
            uint256 remainingRewards = finishAt.sub(block.timestamp).mul(rewardRate);
            rewardRate = _amount.add(remainingRewards).div(duration);
        }

        require(rewardRate > 0, "reward rate = 0");
        require(rewardRate.mul(duration) <= rewardsToken.balanceOf(address(stakevault)), "reward amount > balance");

        finishAt = block.timestamp.add(duration);
        updatedAt = block.timestamp;

        updateRewardInternal(address(0));
    }
    
    // Returns the last applicable timestamp for the rewards
    function lastTimeRewardApplicable() public view returns (uint256) {
        return block.timestamp <= finishAt ? block.timestamp : finishAt;
    }

    function userInfo(address _account) public view returns (uint256, uint256, uint256, uint256, uint256) {
        uint256 userPercentageX1000 = balanceOf[_account].mul(100000).div(totalSupply);
        uint256 userRewardRate = rewardRate.mul(userPercentageX1000).div(100000);
        uint256 userTimeUpdate = block.timestamp.sub(lastClaimedTime[_account]);
        uint256 userCurrentEarned = earned(_account);
        uint256 userEarningsNext24Hours = userRewardRate.mul(1 days);

        if (lastClaimedTime[_account] == 0) {
            userTimeUpdate = block.timestamp.sub(userStakeUpdateTime[_account]);
        }

        return (
            userPercentageX1000, // User percentage multiplied by 1000
            userRewardRate, // User reward rate
            userTimeUpdate, // Time elapsed since the last claim or stake update
            userCurrentEarned, // User's currently earned amount
            userEarningsNext24Hours // Estimated earnings in the next 24 hours
        );
    }
    function getEthBalance(address _address) public view returns (uint256) {
        return _address.balance;
    }
    function setPhaseAndPercentage (uint256 _phase1sec, uint256 _phase2sec, uint256 _phase3sec, uint256 _phase4sec,
    uint256 _percentage1, uint256 _percentage2, uint256 _percentage3) external onlyOwner{
        phase1 = _phase1sec;
        phase2 = _phase2sec;
        phase3 = _phase3sec;
        phase4 = _phase4sec;

        percentage1 = _percentage1;
        percentage2 = _percentage2;
        percentage3 = _percentage3;
    }
    function checkPhase(address user) public view returns (uint256, uint256, uint256, uint256) {
        uint256 currentPhase = 0;  // Default phase
        uint256 phasetime = 0;  // Default phasetime
        uint256 percent = 0; // Default Reward amount to withdraw
        uint256 remainingtime = 0; // Default time left

        if (block.timestamp > (userLastTimeStaked[user] + phase4)) {
            currentPhase = 4;
            percent = 100;
            phasetime = 0;
        } else if (block.timestamp > (userLastTimeStaked[user] + phase3)) {
            currentPhase = 3;
            percent = percentage3;
            phasetime = phase4;
            remainingtime = (userLastTimeStaked[user] + phase4) - block.timestamp;

        } else if (block.timestamp > (userLastTimeStaked[user] + phase2)) {
            currentPhase = 2;
            percent = percentage2;
            phasetime = phase3;
            remainingtime = (userLastTimeStaked[user] + phase3) - block.timestamp;

        } else if (block.timestamp > (userLastTimeStaked[user] + phase1)) {
            currentPhase = 1;
            percent = percentage1;
            phasetime = phase2;
            remainingtime = (userLastTimeStaked[user] + phase2) - block.timestamp;

        } else {
            phasetime = phase1;
            remainingtime = (userLastTimeStaked[user] + phase1) - block.timestamp;
        }
        return (currentPhase, phasetime, percent, remainingtime);
    }
}

// Interface for ERC20 token contract
interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}
设置
{
  "compilationTarget": {
    "contracts/staking_contractV7_2.sol": "StakingV7_2"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}
ABI
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