// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

import "../Manager/ManagerModifier.sol";
import "./IAnimaStaker.sol";
import "./IAnimaChamberData.sol";
import "./IAnimaChamber.sol";
import "./IAnimaStakingRewards.sol";
import "../Anima/IAnima.sol";
import "./IAnimaStakerStorage.sol";
import "../Utils/ArrayUtils.sol";

error NotOwner(address _owner, address _sender, uint256 _tokenId);

contract AnimaStaker is
  ManagerModifier,
  IAnimaStaker,
  Pausable,
  ReentrancyGuard
{
  IAnima public ANIMA;
  IAnimaChamber public ANIMA_CHAMBER;
  IAnimaChamberData public ANIMA_CHAMBER_DATA;
  IAnimaStakerStorage public ANIMA_STAKER_STORAGE;
  IAnimaStakingRewards public ANIMA_STAKING_REWARDS;

  constructor(
    address _manager,
    address _anima,
    address _animaChamber,
    address _animaChamberData,
    address _animaStakerStorage,
    address _animaStakingRewards
  ) ManagerModifier(_manager) {
    ANIMA = IAnima(_anima);
    ANIMA_CHAMBER = IAnimaChamber(_animaChamber);
    ANIMA_CHAMBER_DATA = IAnimaChamberData(_animaChamberData);
    ANIMA_STAKING_REWARDS = IAnimaStakingRewards(_animaStakingRewards);
    ANIMA_STAKER_STORAGE = IAnimaStakerStorage(_animaStakerStorage);
  }

  function stake(uint256 _amount) external whenNotPaused nonReentrant {
    _stake(_amount);
  }

  function expand(
    uint256 _amount,
    uint _chamberId
  ) external whenNotPaused nonReentrant {
    _add(_amount, _chamberId);
  }

  function expandBatch(
    uint256[] calldata _amounts,
    uint256[] calldata _chamberIds
  ) external whenNotPaused nonReentrant {
    ArrayUtils.ensureSameLength(_amounts.length, _chamberIds.length);
    ArrayUtils.checkForDuplicates(_chamberIds);
    for (uint256 i = 0; i < _amounts.length; i++) {
      _add(_amounts[i], _chamberIds[i]);
    }
  }

  function stakeBatch(
    uint256[] calldata _amounts
  ) external whenNotPaused nonReentrant {
    for (uint256 i = 0; i < _amounts.length; i++) {
      _stake(_amounts[i]);
    }
  }

  function unstake(uint256 _tokenId) external whenNotPaused nonReentrant {
    _unstake(_tokenId);
  }

  function unstakeBatch(
    uint256[] calldata _tokenId
  ) external whenNotPaused nonReentrant {
    for (uint256 i = 0; i < _tokenId.length; i++) {
      _unstake(_tokenId[i]);
    }
  }

  function _stake(uint256 _amount) internal {
    ANIMA.transferFrom(msg.sender, address(ANIMA_STAKER_STORAGE), _amount);
    uint256 chamberId = ANIMA_CHAMBER.mintFor(msg.sender);
    ANIMA_CHAMBER_DATA.setStakedAnima(chamberId, _amount);
    ANIMA_STAKER_STORAGE.changeDelta(int(_amount));
  }

  function _add(uint256 _amount, uint256 _chamberId) internal {
    address animaChamberOwner = ANIMA_CHAMBER.ownerOf(_chamberId);
    if (animaChamberOwner != msg.sender) {
      revert NotOwner(animaChamberOwner, msg.sender, _chamberId);
    }

    ANIMA.transferFrom(msg.sender, address(ANIMA_STAKER_STORAGE), _amount);

    (bool isStaked, uint realmId) = ANIMA_STAKING_REWARDS
      .unregisterChamberStaked(_chamberId);

    uint256 current = ANIMA_CHAMBER_DATA.getAndResetStakedAnima(_chamberId);
    ANIMA_CHAMBER_DATA.setStakedAnima(_chamberId, current + _amount);

    if (isStaked) {
      ANIMA_STAKING_REWARDS.registerChamberStaked(_chamberId, realmId);
    }

    ANIMA_STAKER_STORAGE.changeDelta(int(_amount));
  }

  function _unstake(uint256 _chamberId) internal {
    address animaChamberOwner = ANIMA_CHAMBER.ownerOf(_chamberId);
    if (animaChamberOwner != msg.sender) {
      revert NotOwner(animaChamberOwner, msg.sender, _chamberId);
    }

    ANIMA_STAKING_REWARDS.collectManager(_chamberId, true, true);
    ANIMA_CHAMBER.burn(_chamberId);
    uint amountStaked = ANIMA_CHAMBER_DATA.getAndResetStakedAnima(_chamberId);
    ANIMA_STAKER_STORAGE.unstakeAndChangeDelta(animaChamberOwner, amountStaked);
  }

  //=======================================
  // Admin
  //=======================================

  function updateRewards(address _rewards) external onlyAdmin {
    ANIMA_STAKING_REWARDS = IAnimaStakingRewards(_rewards);
  }

  function pause() external onlyAdmin {
    _pause();
  }

  function unpause() external onlyAdmin {
    _unpause();
  }
}

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

library ArrayUtils {
  error ArrayLengthMismatch(uint _length1, uint _length2);
  error InvalidArrayOrder(uint index);

  function ensureSameLength(uint _l1, uint _l2) internal pure {
    if (_l1 != _l2) {
      revert ArrayLengthMismatch(_l1, _l2);
    }
  }

  function ensureSameLength(uint _l1, uint _l2, uint _l3) internal pure {
    ensureSameLength(_l1, _l2);
    ensureSameLength(_l1, _l3);
  }

  function ensureSameLength(
    uint _l1,
    uint _l2,
    uint _l3,
    uint _l4
  ) internal pure {
    ensureSameLength(_l1, _l2);
    ensureSameLength(_l1, _l3);
    ensureSameLength(_l1, _l4);
  }

  function ensureSameLength(
    uint _l1,
    uint _l2,
    uint _l3,
    uint _l4,
    uint _l5
  ) internal pure {
    ensureSameLength(_l1, _l2);
    ensureSameLength(_l1, _l3);
    ensureSameLength(_l1, _l4);
    ensureSameLength(_l1, _l5);
  }

  function checkForDuplicates(uint[] memory _ids) internal pure {
    int lastId = -1;
    for (uint i = 0; i < _ids.length; i++) {
      if (int(_ids[i]) <= lastId) {
        revert InvalidArrayOrder(i);
      }
      lastId = int(_ids[i]);
    }
  }

  function checkForDuplicates(
    address[] memory _tokenAddrs,
    uint[] memory _tokenIds
  ) internal pure {
    address lastAddress;
    int256 lastTokenId = -1;
    for (uint i = 0; i < _tokenAddrs.length; i++) {
      if (_tokenAddrs[i] > lastAddress) {
        lastTokenId = -1;
      }

      if (_tokenAddrs[i] < lastAddress || int(_tokenIds[i]) <= lastTokenId) {
        revert InvalidArrayOrder(i);
      }
      lastAddress = _tokenAddrs[i];
      lastTokenId = int(_tokenIds[i]);
    }
  }

  function toSingleValueDoubleArray(
    uint[] memory _vals
  ) internal pure returns (uint[][] memory result) {
    result = new uint[][](_vals.length);
    for (uint i = 0; i < _vals.length; i++) {
      result[i] = ArrayUtils.toMemoryArray(_vals[i], 1);
    }
  }

  function toMemoryArray(
    uint _value,
    uint _length
  ) internal pure returns (uint[] memory result) {
    result = new uint[](_length);
    for (uint i = 0; i < _length; i++) {
      result[i] = _value;
    }
  }

  function toMemoryArray(
    uint[] calldata _value
  ) internal pure returns (uint[] memory result) {
    result = new uint[](_value.length);
    for (uint i = 0; i < _value.length; i++) {
      result[i] = _value[i];
    }
  }

  function toMemoryArray(
    address _address,
    uint _length
  ) internal pure returns (address[] memory result) {
    result = new address[](_length);
    for (uint i = 0; i < _length; i++) {
      result[i] = _address;
    }
  }

  function toMemoryArray(
    address[] calldata _addresses
  ) internal pure returns (address[] memory result) {
    result = new address[](_addresses.length);
    for (uint i = 0; i < _addresses.length; i++) {
      result[i] = _addresses[i];
    }
  }
}

// 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

pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";

interface IAnima is IERC20, IERC20Metadata {
  function CAP() external view returns (uint256);

  function mintFor(address _for, uint256 _amount) external;

  function burnFrom(address account, uint256 amount) external;
}

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

interface IAnimaChamber is IERC721 {
  function burn(uint256 _tokenId) external;

  function mintFor(address _for) external returns (uint256);

  function tokensOfOwner(
    address _owner
  ) external view returns (uint256[] memory);
}

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

interface IAnimaChamberData {
  function stakedAnima(uint256 _tokenId) external view returns (uint256);

  function mintedAt(uint256 _tokenId) external view returns (uint256);

  function stakedAnimaBatch(
    uint256[] calldata _tokenId
  ) external view returns (uint256[] memory result);

  function setStakedAnima(uint256 _tokenId, uint256 _amount) external;

  function getAndResetStakedAnima(
    uint _tokenId
  ) external returns (uint256 result);
}

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

interface IAnimaStaker {
  function stake(uint256 _amount) external;

  function stakeBatch(uint256[] calldata _amounts) external;

  function unstake(uint256 _tokenId) external;

  function unstakeBatch(uint256[] calldata _tokenId) external;
}

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

interface IAnimaStakerStorage {
  function unstakeAndChangeDelta(address _for, uint256 _amount) external;

  function getTotal() external view returns (uint);

  function getEpochChanges(uint _epoch) external view returns (int);

  function getEpochChangesBatch(
    uint startEpoch,
    uint endEpoch
  ) external view returns (int[] memory result);

  function changeDelta(int _delta) external;
}

// SPDX-License-Identifier: Unlicensed

pragma solidity ^0.8.17;

interface IAnimaStakingRewards {
  function stakerCollect(
    uint256 _tokenId,
    bool _compound,
    uint[] calldata _params
  ) external;

  function stakerCollectBatch(
    uint256[] calldata _tokenId,
    bool[] calldata _compound,
    uint[][] calldata _params
  ) external;

  function realmerCollect(uint256 _realmId) external;

  function realmerCollectBatch(uint256[] calldata _realmIds) external;

  function collectManager(
    uint256 _tokenId,
    bool _forStaker,
    bool _forRealmer
  ) external;

  function registerChamberStaked(uint256 _chamberId, uint256 _realmId) external;

  function unregisterChamberStaked(
    uint256 _chamberId
  ) external returns (bool wasStaked, uint realmId);

  function unregisterChamberStaked(
    uint256 _chamberId,
    uint256 _realmId
  ) external returns (bool success);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// 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 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

interface IManager {
  function isAdmin(address _addr) external view returns (bool);

  function isManager(address _addr, uint256 _type) external view returns (bool);

  function addManager(address _addr, uint256 _type) external;

  function removeManager(address _addr, uint256 _type) external;

  function addAdmin(address _addr) external;

  function removeAdmin(address _addr) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

import "../Manager/IManager.sol";

abstract contract ManagerModifier {
  //=======================================
  // Immutables
  //=======================================
  IManager public immutable MANAGER;

  //=======================================
  // Constructor
  //=======================================
  constructor(address _manager) {
    MANAGER = IManager(_manager);
  }

  //=======================================
  // Modifiers
  //=======================================
  modifier onlyAdmin() {
    require(MANAGER.isAdmin(msg.sender), "Manager: Not an Admin");
    _;
  }

  modifier onlyManager() {
    require(MANAGER.isManager(msg.sender, 0), "Manager: Not manager");
    _;
  }

  modifier onlyMinter() {
    require(MANAGER.isManager(msg.sender, 1), "Manager: Not minter");
    _;
  }

  modifier onlyTokenMinter() {
    require(MANAGER.isManager(msg.sender, 2), "Manager: Not token minter");
    _;
  }

  modifier onlyBinder() {
    require(MANAGER.isManager(msg.sender, 3), "Manager: Not binder");
    _;
  }

  modifier onlyConfigManager() {
    require(MANAGER.isManager(msg.sender, 4), "Manager: Not config manager");
    _;
  }

  modifier onlyTokenSpender() {
    require(MANAGER.isManager(msg.sender, 5), "Manager: Not token spender");
    _;
  }

  modifier onlyTokenEmitter() {
    require(MANAGER.isManager(msg.sender, 6), "Manager: Not token emitter");
    _;
  }

  modifier onlyPauser() {
    require(
      MANAGER.isAdmin(msg.sender) || MANAGER.isManager(msg.sender, 6),
      "Manager: Not pauser"
    );
    _;
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (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() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // 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;
    }
}

{
  "compilationTarget": {
    "contracts/AnimaStaking/AnimaStaker.sol": "AnimaStaker"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}