Contract

/**
 *Submitted for verification at Etherscan.io on 2022-12-28
*/

// Sources flattened with hardhat v2.12.0 https://hardhat.org

// File contracts/opensea/IOperatorFilterRegistry.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

interface IOperatorFilterRegistry {
  function isOperatorAllowed(
    address registrant,
    address operator
  ) external view returns (bool);

  function register(address registrant) external;

  function unregister(address addr) external;

  function registerAndSubscribe(
    address registrant,
    address subscription
  ) external;

  function registerAndCopyEntries(
    address registrant,
    address registrantToCopy
  ) external;

  function updateOperator(
    address registrant,
    address operator,
    bool filtered
  ) external;

  function updateOperators(
    address registrant,
    address[] calldata operators,
    bool filtered
  ) external;

  function updateCodeHash(
    address registrant,
    bytes32 codehash,
    bool filtered
  ) external;

  function updateCodeHashes(
    address registrant,
    bytes32[] calldata codeHashes,
    bool filtered
  ) external;

  function subscribe(
    address registrant,
    address registrantToSubscribe
  ) external;

  function unsubscribe(address registrant, bool copyExistingEntries) external;

  function subscriptionOf(address addr) external returns (address registrant);

  function subscribers(address registrant) external returns (address[] memory);

  function subscriberAt(
    address registrant,
    uint256 index
  ) external returns (address);

  function copyEntriesOf(address registrant, address registrantToCopy) external;

  function isOperatorFiltered(
    address registrant,
    address operator
  ) external view returns (bool);

  function isCodeHashOfFiltered(
    address registrant,
    address operatorWithCode
  ) external view returns (bool);

  function isCodeHashFiltered(
    address registrant,
    bytes32 codeHash
  ) external view returns (bool);

  function filteredOperators(
    address addr
  ) external view returns (address[] memory);

  function filteredCodeHashes(
    address addr
  ) external view returns (bytes32[] memory);

  function filteredOperatorAt(
    address registrant,
    uint256 index
  ) external view returns (address);

  function filteredCodeHashAt(
    address registrant,
    uint256 index
  ) external view returns (bytes32);

  function isRegistered(address addr) external view returns (bool);

  function codeHashOf(address addr) external view returns (bytes32);
}

// File contracts/libraries/OperatorFiltererLib.sol

pragma solidity ^0.8.11;

library OperatorFiltererLib {
  error OperatorNotAllowed(address operator);

  IOperatorFilterRegistry public constant OPERATOR_FILTER_REGISTRY =
    IOperatorFilterRegistry(0x000000000000AAeB6D7670E522A718067333cd4E);

  function initializeFilter(
    address registrant,
    address subscriptionOrRegistrantToCopy,
    bool subscribe
  ) public {
    // If an inheriting token contract is deployed to a network without the registry deployed, the modifier
    // will not revert, but the contract will need to be registered with the registry once it is deployed in
    // order for the modifier to filter addresses.
    if (subscribe) {
      OPERATOR_FILTER_REGISTRY.registerAndSubscribe(
        registrant,
        subscriptionOrRegistrantToCopy
      );
    } else {
      if (subscriptionOrRegistrantToCopy != address(0)) {
        OPERATOR_FILTER_REGISTRY.registerAndCopyEntries(
          registrant,
          subscriptionOrRegistrantToCopy
        );
      } else {
        OPERATOR_FILTER_REGISTRY.register(registrant);
      }
    }
  }

  function onlyAllowedOperator(
    address registrant,
    address msgSender,
    address from
  ) public view {
    // Allow spending tokens from addresses with balance
    // Note that this still allows listings and marketplaces with escrow to transfer tokens if transferred
    // from an EOA.
    if (from == msgSender) {
      return;
    }
    if (!OPERATOR_FILTER_REGISTRY.isOperatorAllowed(registrant, msgSender)) {
      revert OperatorNotAllowed(msgSender);
    }
  }

  function onlyAllowedOperatorApproval(
    address registrant,
    address operator
  ) public view {
    if (!OPERATOR_FILTER_REGISTRY.isOperatorAllowed(registrant, operator)) {
      revert OperatorNotAllowed(operator);
    }
  }
}

[{"inputs":[{"internalType":"address","name":"operator","type":"address"}],"name":"OperatorNotAllowed","type":"error"},{"inputs":[],"name":"OPERATOR_FILTER_REGISTRY","outputs":[{"internalType":"contract IOperatorFilterRegistry","name":"","type":"IOperatorFilterRegistry"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"registrant","type":"address"},{"internalType":"address","name":"msgSender","type":"address"},{"internalType":"address","name":"from","type":"address"}],"name":"onlyAllowedOperator","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"registrant","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"onlyAllowedOperatorApproval","outputs":[],"stateMutability":"view","type":"function"}]

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ipfs://5ba475177204356747a1819dbbf5f0fa65e74881f769631fc476a0db97268e2c