// 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 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 (last updated v4.6.0) (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 be 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: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * 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: Unlicense

pragma solidity ^0.8.4;

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

interface IMutants is IERC721 {
    function MAX_SUPPLY() external view returns (uint256);
    function totalSupply() external view returns (uint256);
    function tier(uint256) external view returns (uint256);
}

// SPDX-License-Identifier: Unlicense

pragma solidity ^0.8.4;

import "./ISpendable.sol";

interface IScales is ISpendable {
    function getAllOwned(address) external view returns (uint256[] memory);
}

//SPDX-License-Identifier: Unlicense

pragma solidity ^0.8.4;

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

interface ISpendable is IERC20 {
    function getSpendable(address) external view returns (uint256);
    function spend(address, uint256) external;
    function credit(address, uint256) external;
}

// SPDX-License-Identifier: Unlicense

pragma solidity ^0.8.11;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";

import "./interfaces/IMutants.sol";
import "./interfaces/IScales.sol";

error MutantScales_FunctionLocked();
error MutantScales_SenderNotTokenOwner();
error MutantScales_StartTimeAlreadySet();
error MutantScales_StartTimeNotSet();
error MutantScales_TokenIdOutOfRange();

/**                                     ..',,;;;;:::;;;,,'..
                                 .';:ccccc:::;;,,,,,;;;:::ccccc:;'.
                            .,:ccc:;'..                      ..';:ccc:,.
                        .':cc:,.                                    .,ccc:'.
                     .,clc,.                                            .,clc,.
                   'clc'                                                    'clc'
                .;ll,.                                                        .;ll;.
              .:ol.                                                              'co:.
             ;oc.                                                                  .co;
           'oo'                                                                      'lo'
         .cd;                                                                          ;dc.
        .ol.                                                                 .,.        .lo.
       ,dc.                                                               'cxKWK;         cd,
      ;d;                                                             .;oONWMMMMXc         ;d;
     ;d;                                                           'cxKWMMMMMMMMMXl.        ;x;
    ,x:            ;dxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx0NMMMMMMMMMMMMMMNd.        :x,
   .dc           .lXMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNd.        cd.
   ld.          .oNMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWXkl'         .dl
  ,x;          .xWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMN0d:.             ;x,
  oo.         .kWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMWKxc'.                .oo
 'x:          .kWMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMNOo;.                     :x'
 :x.           .xWMMMMMMMMMMM0occcccccccccccccccccccccccccccccccccccc:'                         .x:
 lo.            .oNMMMMMMMMMX;                                                                  .ol
.ol              .lXMMMMMMMWd.  ,dddddddddddddddo;.   .:dddddddddddddo,                          lo.
.dl                cXMMMMMM0,  'OMMMMMMMMMMMMMMNd.   .xWMMMMMMMMMMMMXo.                          ld.
.dl                 ;KMMMMNl   oWMMMMMMMMMMMMMXc.   ,OWMMMMMMMMMMMMK:                            ld.
 oo                  ,OWMMO.  ,KMMMMMMMMMMMMW0;   .cKMMMMMMMMMMMMWO,                             oo
 cd.                  'kWX:  .xWMMMMMMMMMMMWx.  .dKNMMMMMMMMMMMMNd.                             .dc
 ,x,                   .dd.  ;KMMMMMMMMMMMXo.  'kWMMMMMMMMMMMMMXl.                              ,x;
 .dc                     .   .,:loxOKNWMMK:   ;0WMMMMMMMMMMMMW0;                                cd.
  :d.                      ...      ..,:c'  .lXMMMMMMMMMMMMMWk'                                .d:
  .dl                      :OKOxoc:,..     .xNMMMMMMMMMMMMMNo.                                 cd.
   ;x,                      ;0MMMMWWXKOxoclOWMMMMMMMMMMMMMKc                                  ,x;
    cd.                      ,OWMMMMMMMMMMMMMMMMMMMMMMMMWO,                                  .dc
    .oo.                      .kWMMMMMMMMMMMMMMMMMMMMMMNx.                                  .oo.
     .oo.                      .xWMMMMMMMMMMMMMMMMMMMMXl.                                  .oo.
      .lo.                      .oNMMMMMMMMMMMMMMMMMW0;                                   .ol.
       .cd,                      .lXMMMMMMMMMMMMMMMWk'                                   ,dc.
         ;dc.                      :KMMMMMMMMMMMMNKo.                                  .cd;
          .lo,                      ;0WWWWWWWWWWKc.                                   'ol.
            ,ol.                     .,,,,,,,,,,.                                   .lo,
             .;oc.                                                                .co:.
               .;ol'                                                            'lo;.
                  ,ll:.                                                      .:ll,
                    .:ll;.                                                .;ll:.
                       .:ll:,.                                        .,:ll:.
                          .,:ccc;'.                              .';ccc:,.
                              .';cccc::;'...            ...';:ccccc;'.
                                    .',;::cc::cc::::::::::::;,..
                                              ........
 * @title MutantScales
 * @author Augminted Labs, LLC
 * @notice Passive rewards contract allowing MUTANT to earn $SCALES
 * @notice For more details see: https://medium.com/@AugmintedLabs/kaijukingz-p2e-ecosystem-dc9577ff8773
 */
contract MutantScales is Ownable, Pausable {
    uint256 public constant BASE_RATE = 2 ether;

    IMutants public Mutants;
    IScales public Scales;
    uint256 public startTime;
    mapping(uint256 => uint256) public claimed;
    mapping(bytes4 => bool) public functionLocked;

    constructor(
        address mutants,
        address scales
    ) {
        Mutants = IMutants(mutants);
        Scales = IScales(scales);
    }

    /**
     * @notice Modifier applied to functions that will be disabled when they're no longer needed
     */
    modifier lockable() {
        if (functionLocked[msg.sig]) revert MutantScales_FunctionLocked();
        _;
    }

    /**
     * @notice Set SCALES token address
     * @param scales Address of SCALES token contract
     */
    function setScales(address scales) external lockable onlyOwner {
        Scales = IScales(scales);
    }

    /**
     * @notice Set MUTANT token address
     * @param mutants Address of MUTANT token contract
     */
    function setMutants(address mutants) external lockable onlyOwner {
        Mutants = IMutants(mutants);
    }

    /**
     * @notice Start timer for $SCALES rewards
     * @dev WARNING: This cannot be undone
     */
    function setStartTime() external onlyOwner {
        if (startTime != 0) revert MutantScales_StartTimeAlreadySet();

        startTime = block.timestamp;
    }

    /**
     * @notice Get the amount of $SCALES claimable from a MUTANT
     * @param tokenId MUTANT to return the the claimable $SCALES for
     * @return uint256 Amount of $SCALES claimable for specified MUTANT
     */
    function getClaimable(uint256 tokenId) public view returns (uint256) {
        if (tokenId >= Mutants.MAX_SUPPLY()) revert MutantScales_TokenIdOutOfRange();
        if (startTime == 0) revert MutantScales_StartTimeNotSet();

        return ((BASE_RATE * (block.timestamp - startTime)) / 1 days) - claimed[tokenId];
    }

    /**
     * @notice Claim $SCALES for a specified set of MUTANT tokens
     * @param tokenIds MUTANT which the sender owns to claim $SCALES for
     */
    function claim(uint256[] calldata tokenIds) public whenNotPaused {
        uint256 totalClaimable = 0;

        for (uint256 i; i < tokenIds.length; ++i) {
            if (_msgSender() != Mutants.ownerOf(tokenIds[i])) revert MutantScales_SenderNotTokenOwner();

            uint256 claimable = getClaimable(tokenIds[i]);
            claimed[tokenIds[i]] += claimable;
            totalClaimable += claimable;
        }

        Scales.credit(_msgSender(), totalClaimable);
    }

    /**
     * @notice Flip paused state to temporarily disable claiming
     */
    function flipPaused() external lockable onlyOwner {
        paused() ? _unpause() : _pause();
    }

    /**
     * @notice Lock individual functions that are no longer needed
     * @dev Only affects functions with the lockable modifier
     * @param id First 4 bytes of the calldata (i.e. function identifier)
     */
    function lockFunction(bytes4 id) external onlyOwner {
        functionLocked[id] = true;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (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 Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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 v4.4.1 (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 Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

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

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

{
  "compilationTarget": {
    "MutantScales.sol": "MutantScales"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}