SNRGStaking

{{
  "language": "Solidity",
  "sources": {
    "@openzeppelin/contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}
"
    },
    "@openzeppelin/contracts/token/ERC20/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.4.0) (token/ERC20/IERC20.sol)

pragma solidity >=0.4.16;

/**
 * @dev Interface of the ERC-20 standard as defined in the ERC.
 */
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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}
"
    },
    "@openzeppelin/contracts/utils/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @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;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}
"
    },
    "@openzeppelin/contracts/utils/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)

pragma solidity ^0.8.20;

/**
 * @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 EIP-1153 (transient storage) is available on the chain you're deploying at,
 * consider using {ReentrancyGuardTransient} instead.
 *
 * 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;

    /**
     * @dev Unauthorized reentrant call.
     */
    error ReentrancyGuardReentrantCall();

    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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be NOT_ENTERED
        if (_status == ENTERED) {
            revert ReentrancyGuardReentrantCall();
        }

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

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == ENTERED;
    }
}
"
    },
    "contracts/SNRGstaking.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.26;

/* *
*  /$$$$$$                                                             
* /$$__  $$                                                            
*| $$  \__/ /$$   /$$ /$$$$$$$   /$$$$$$   /$$$$$$   /$$$$$$  /$$   /$$
*|  $$$$$$ | $$  | $$| $$__  $$ /$$__  $$ /$$__  $$ /$$__  $$| $$  | $$
* \____  $$| $$  | $$| $$  \ $$| $$$$$$$$| $$  \__/| $$  \ $$| $$  | $$
* /$$  \ $$| $$  | $$| $$  | $$| $$_____/| $$      | $$  | $$| $$  | $$
*|  $$$$$$/|  $$$$$$$| $$  | $$|  $$$$$$$| $$      |  $$$$$$$|  $$$$$$$
* \______/  \____  $$|__/  |__/ \_______/|__/       \____  $$ \____  $$
*           /$$  | $$                               /$$  \ $$ /$$  | $$
*          |  $$$$$$/                              |  $$$$$$/|  $$$$$$/
*           \______/                                \______/  \______/ 
*  /$$$$$$   /$$               /$$       /$$                           
* /$$__  $$ | $$              | $$      |__/                           
*| $$  \__//$$$$$$    /$$$$$$ | $$   /$$ /$$ /$$$$$$$   /$$$$$$        
*|  $$$$$$|_  $$_/   |____  $$| $$  /$$/| $$| $$__  $$ /$$__  $$       
* \____  $$ | $$      /$$$$$$$| $$$$$$/ | $$| $$  \ $$| $$  \ $$       
* /$$  \ $$ | $$ /$$ /$$__  $$| $$_  $$ | $$| $$  | $$| $$  | $$       
*|  $$$$$$/ |  $$$$/|  $$$$$$$| $$ \  $$| $$| $$  | $$|  $$$$$$$       
* \______/   \___/   \_______/|__/  \__/|__/|__/  |__/ \____  $$       
*                                                      /$$  \ $$       
*                                                     |  $$$$$$/       
*                                                      \______/        
* */

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

contract SNRGStaking is Ownable, ReentrancyGuard {
    IERC20 public snrg;
    address public immutable treasury;
    bool public isFunded; // <-- NEW: Flag to ensure it's only funded once

    // ... (Stake struct and mappings remain the same) ...
    
    struct Stake {
        uint256 amount;
        uint256 reward;
        uint256 endTime;
        bool withdrawn;
    }

    mapping(uint64 => uint256) public rewardRates;
    mapping(address => Stake[]) public userStakes;
    
    uint256 public constant EARLY_WITHDRAWAL_FEE_BPS = 500; // 5.0%

    event Staked(address indexed user, uint256 indexed stakeIndex, uint256 amount, uint256 reward, uint256 endTime);
    event Withdrawn(address indexed user, uint256 indexed stakeIndex, uint256 amount, uint256 reward);
    event WithdrawnEarly(address indexed user, uint256 indexed stakeIndex, uint256 amount, uint256 fee);
    event ContractFunded(uint256 amount); // <-- NEW: Event for funding

    constructor(address _treasury, address owner_) Ownable(owner_) {
        require(_treasury != address(0), "treasury=0");
        treasury = _treasury;

        rewardRates[30] = 125; // 1.25%
        rewardRates[60] = 250; // 2.50%
        rewardRates[90] = 375; // 3.75%
        rewardRates[180] = 500; // 5.00%
    }

    /**
     * @notice NEW: Pulls the approved reward funds from the treasury.
     * @dev The treasury wallet must have first called `approve()` on the SNRG token contract.
     * @param amount The total amount of SNRG to pull for rewards.
     */
    function fundContract(uint256 amount) external onlyOwner {
        require(!isFunded, "already funded");
        require(amount > 0, "amount=0");
        
        isFunded = true;
        require(snrg.transferFrom(treasury, address(this), amount), "fund transfer failed");
        
        emit ContractFunded(amount);
    }
    
    function stake(uint256 amount, uint64 duration) external nonReentrant {
        require(amount > 0, "amount=0");
        uint256 rewardBps = rewardRates[duration];
        require(rewardBps > 0, "invalid duration");

        require(snrg.transferFrom(msg.sender, address(this), amount), "transferFrom fail");

        uint256 reward = (amount * rewardBps) / 10000;
        uint256 endTime = block.timestamp + (duration * 1 days);

        uint256 stakeIndex = userStakes[msg.sender].length;
        userStakes[msg.sender].push(Stake({
            amount: amount,
            reward: reward,
            endTime: endTime,
            withdrawn: false
        }));

        emit Staked(msg.sender, stakeIndex, amount, reward, endTime);
    }

    function withdraw(uint256 stakeIndex) external nonReentrant {
        Stake storage s = userStakes[msg.sender][stakeIndex];
        
        require(!s.withdrawn, "already withdrawn");
        require(block.timestamp >= s.endTime, "stake not matured");

        s.withdrawn = true;
        uint256 totalPayout = s.amount + s.reward;
        
        require(snrg.transfer(msg.sender, totalPayout), "transfer fail");
        emit Withdrawn(msg.sender, stakeIndex, s.amount, s.reward);
    }

    function withdrawEarly(uint256 stakeIndex) external nonReentrant {
        Stake storage s = userStakes[msg.sender][stakeIndex];
        
        require(!s.withdrawn, "already withdrawn");
        require(block.timestamp < s.endTime, "stake has matured");

        s.withdrawn = true;
        
        uint256 fee = (s.amount * EARLY_WITHDRAWAL_FEE_BPS) / 10000;
        uint256 returnAmount = s.amount - fee;
        
        require(snrg.transfer(treasury, fee), "fee transfer fail");
        require(snrg.transfer(msg.sender, returnAmount), "return transfer fail");
        
        emit WithdrawnEarly(msg.sender, stakeIndex, returnAmount, fee);
    }

    function getStakeCount(address user) external view returns (uint256) {
        return userStakes[user].length;
    }

    function getStake(address user, uint256 stakeIndex) external view returns (Stake memory) {
        return userStakes[user][stakeIndex];
    }

    function setSnrgToken(address _snrg) external onlyOwner {
        require(address(snrg) == address(0), "SNRG token address already set");
        require(_snrg != address(0), "snrg=0");
        snrg = IERC20(_snrg);
    }
}"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}