Contract

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.18;

import { IERC1155 } from "@openzeppelin/contracts-v5/token/ERC1155/IERC1155.sol";
import { IERC1155Receiver } from "@openzeppelin/contracts-v5/token/ERC1155/IERC1155Receiver.sol";
import { IERC165 } from "@openzeppelin/contracts-v5/utils/introspection/IERC165.sol";
import { IERC20 } from "@openzeppelin/contracts-v5/token/ERC20/IERC20.sol";
import { IERC721 } from "@openzeppelin/contracts-v5/token/ERC721/IERC721.sol";
import { IERC721Receiver } from "@openzeppelin/contracts-v5/token/ERC721/IERC721Receiver.sol";
import { IWorldSplit } from "./interfaces/internal/IWorldSplit.sol";
import { IWorldsInventoryBySplit } from "./interfaces/internal/IWorldsInventoryBySplit.sol";

import { Address } from "@openzeppelin/contracts-v5/utils/Address.sol";
import { RouteCallLibrary } from "./libraries/RouteCallLibrary.sol";

import { ERC165 } from "@openzeppelin/contracts-v5/utils/introspection/ERC165.sol";
import { Ownable2Step } from "./mixins/worlds/split/Ownable2Step.sol";
import { WorldsNftNode } from "./mixins/shared/WorldsNftNode.sol";

import { SEND_VALUE_GAS_LIMIT_MULTIPLE_RECIPIENTS } from "./mixins/shared/Constants.sol";

/**
 * @title A contract to receive and forward funds, allowing sales to be associated with a World by payment address
 * alone.
 * @notice Intended to be used for ETH payments only, but recovery mechanisms are available for other asset types.
 * @author HardlyDifficult
 */
contract WorldSplit is IWorldSplit, IERC721Receiver, IERC1155Receiver, ERC165, WorldsNftNode, Ownable2Step {
  using Address for address payable;

  /**
   * @notice Emitted when an ETH payment is made while the split is not associated with a World.
   * All revenue is forwarded to the creator instead.
   * @param marketplace The address of the marketplace which forwarded payment.
   * @param valueInWei The amount of ETH received.
   */
  event NotInAWorld(address indexed marketplace, uint256 valueInWei);

  /**
   * @notice Emitted when the owner of this contract is non-receivable and the ETH transfer fails.
   * Revenue is stored in this address for future withdraw.
   * @param escrowedValueInWei The total amount of ETH currently in escrow.
   */
  event PaymentEscrowed(uint256 escrowedValueInWei);

  /**
   * @notice Emitted when the owner of the contract makes an arbitrary call.
   * @param operator The current owner and account which initiated the function call.
   * @param target The address of the contract which received the call.
   */
  event ProxyCall(address indexed operator, address indexed target);

  /**
   * @notice Emitted when the owner of the contract withdraws ETH.
   * @param owner The owner which received the ETH.
   * @param amount How much ETH was transferred.
   */
  event WithdrawETH(address indexed owner, uint256 amount);

  error WorldSplit_No_ETH_Balance_To_Withdraw();
  error WorldSplit_No_ERC1155_Balance_To_Withdraw();
  error WorldSplit_No_ERC20_Balance_To_Withdraw();
  error WorldSplit_Owner_Cannot_Be_Zero_Address();

  ////////////////////////////////////////////////////////////////
  // Setup
  ////////////////////////////////////////////////////////////////

  /**
   * @notice Set immutable variables for the implementation contract.
   * @param _worlds The address of the Worlds NFT contract.
   */
  constructor(address _worlds) WorldsNftNode(_worlds) {
    // Initialize the template to a non-zero & unusable address so it cannot be initialized.
    _transferOwnership(0x000000000000000000000000000000000000dEaD);
  }

  /**
   * @notice Initialize this instance of the split for a particular listing.
   * @param ownerAndAssetRecipient The owner of this contract which will receive assets sent to this contract.
   */
  function initialize(address payable ownerAndAssetRecipient) external onlyUnassignedOwner {
    if (ownerAndAssetRecipient == address(0)) {
      revert WorldSplit_Owner_Cannot_Be_Zero_Address();
    }
    _transferOwnership(ownerAndAssetRecipient);
  }

  ////////////////////////////////////////////////////////////////
  // Receivers / Auto-Forwarders
  ////////////////////////////////////////////////////////////////

  /**
   * @notice When ETH is sent to this contract, check for an association via the Worlds contract before forwarding the
   * ETH to the curator (if applicable) and the creator.
   * @dev If the split is no longer associated with a World, fallback to sending the ETH to the owner of this contract.
   */
  receive() external payable {
    bool success;

    // Forwards the ETH received to the Worlds contract for attribution and distribution.
    // A gas limit is applied to ensure Worlds doesn't get stuck in a loop or otherwise exhaust a reasonable limit.
    try
      IWorldsInventoryBySplit(worlds).soldInWorldBySplit{ gas: SEND_VALUE_GAS_LIMIT_MULTIPLE_RECIPIENTS }(
        msg.sender,
        msg.value
      )
    returns (address payable worldPaymentAddress, uint256 curatorTakeInWei) {
      // Assume that the Worlds contract emitted the appropriate event.

      if (curatorTakeInWei != 0) {
        (success, ) = worldPaymentAddress.call{
          value: curatorTakeInWei,
          gas: SEND_VALUE_GAS_LIMIT_MULTIPLE_RECIPIENTS
        }("");

        if (!success) {
          // If the curator payment reverts, the full amount will be sent to the creator.
          // Emit the failure from the Worlds contract to simplify reporting.
          IWorldsInventoryBySplit(worlds).soldInWorldBySplitWorldPaymentFailed{
            gas: SEND_VALUE_GAS_LIMIT_MULTIPLE_RECIPIENTS
          }(msg.sender, msg.value);
        }
      }
    } catch {
      emit NotInAWorld(msg.sender, msg.value);
    }

    if (address(this).balance != 0) {
      // Send the remainder to the owner without any gas restriction.
      (success, ) = owner().call{ value: address(this).balance }("");
      // If the owner consumes all gas on payment, the original ETH transfer may revert.

      if (!success) {
        emit PaymentEscrowed(address(this).balance);
      }
    }
  }

  /**
   * @notice If an ERC721 is send to this contract, immediately transfer it to the owner of this contract instead.
   * @dev This is not a supported use case, but included to make a best effort at forwarding assets to the owner.
   */
  function onERC721Received(
    address /* operator */,
    address /* from */,
    uint256 tokenId,
    bytes calldata data
  ) external returns (bytes4) {
    IERC721(msg.sender).safeTransferFrom(address(this), owner(), tokenId, data);
    // Assume the ERC721 contract emitted the appropriate event.
    return IERC721Receiver.onERC721Received.selector;
  }

  /**
   * @notice If an ERC1155 is send to this contract, immediately transfer it to the owner of this contract instead.
   * @dev This is not a supported use case, but included to make a best effort at forwarding assets to the owner.
   */
  function onERC1155Received(
    address /* operator */,
    address /* from */,
    uint256 id,
    uint256 value,
    bytes calldata data
  ) external override returns (bytes4) {
    IERC1155(msg.sender).safeTransferFrom(address(this), owner(), id, value, data);
    // Assume the ERC1155 contract emitted the appropriate event.
    return IERC1155Receiver.onERC1155Received.selector;
  }

  /**
   * @notice If multiple ERC1155s are send to this contract, immediately transfer them to the owner of this contract
   * instead.
   * @dev This is not a supported use case, but included to make a best effort at forwarding assets to the owner.
   */
  function onERC1155BatchReceived(
    address /* operator */,
    address /* from */,
    uint256[] calldata ids,
    uint256[] calldata values,
    bytes calldata data
  ) external override returns (bytes4) {
    IERC1155(msg.sender).safeBatchTransferFrom(address(this), owner(), ids, values, data);
    // Assume the ERC1155 contract emitted the appropriate event.
    return IERC1155Receiver.onERC1155BatchReceived.selector;
  }

  ////////////////////////////////////////////////////////////////
  // Recovery Functions
  ////////////////////////////////////////////////////////////////

  /**
   * @notice Allow the owner of this contract to make any arbitrary call.
   * @param target The contract address to call.
   * @param valueInWei How much ETH to send with the call.
   * @param callData The function on the `target` to call.
   * @dev This function is not normally required, but included to allow the recovery of any unaccounted for assets or
   * permissions.
   */
  function proxyCall(
    address target,
    uint256 valueInWei,
    bytes calldata callData
  ) external payable onlyOwner returns (bytes memory returnData) {
    bool success;
    (success, returnData) = target.call{ value: valueInWei }(callData);
    if (!success) {
      RouteCallLibrary.revertWithError(returnData);
    }

    emit ProxyCall(msg.sender, target);

    // After the call, refund any ETH remaining in the contract.
    if (address(this).balance > 0) {
      _withdrawETH();
    }
  }

  /**
   * @notice Allow anyone to send any ETH held by this contract to the owner.
   */
  function withdrawETH() external {
    if (address(this).balance == 0) {
      revert WorldSplit_No_ETH_Balance_To_Withdraw();
    }
    _withdrawETH();
  }

  function _withdrawETH() private {
    uint256 balance = address(this).balance;
    payable(owner()).sendValue(balance);

    emit WithdrawETH(owner(), balance);
  }

  /**
   * @notice Allow anyone to transfer an ERC-1155 token to the owner.
   * @param nftContract The address of the ERC-1155 contract.
   * @param tokenId The ID of the token to transfer.
   */
  function withdrawERC1155(IERC1155 nftContract, uint256 tokenId) external {
    uint256 balance = nftContract.balanceOf(address(this), tokenId);
    if (balance == 0) {
      revert WorldSplit_No_ERC1155_Balance_To_Withdraw();
    }
    nftContract.safeTransferFrom(address(this), owner(), tokenId, balance, "");
    // Assume the ERC1155 contract emitted the appropriate event.
  }

  /**
   * @notice Allow anyone to transfer the balance of an ERC-20 token to the owner.
   * @param token The address of the ERC-20 contract.
   */
  function withdrawERC20(IERC20 token) external {
    uint256 balance = token.balanceOf(address(this));
    if (balance == 0) {
      revert WorldSplit_No_ERC20_Balance_To_Withdraw();
    }
    token.transfer(owner(), balance);
    // Assume the ERC20 contract emitted the appropriate event.
  }

  /**
   * @notice Allow anyone to transfer an ERC-721 token to the owner.
   * @param nftContract The address of the ERC-721 contract.
   * @param tokenId The ID of the token to transfer.
   */
  function withdrawERC721(IERC721 nftContract, uint256 tokenId) external {
    nftContract.transferFrom(address(this), owner(), tokenId);
    // Assume the ERC721 contract emitted the appropriate event.
  }

  ////////////////////////////////////////////////////////////////
  // ERC165
  ////////////////////////////////////////////////////////////////

  /// @inheritdoc IERC165
  function supportsInterface(
    bytes4 interfaceId
  ) public view override(IERC165, ERC165, Ownable2Step) returns (bool isSupported) {
    isSupported =
      interfaceId == type(IERC721Receiver).interfaceId ||
      interfaceId == type(IERC1155Receiver).interfaceId ||
      super.supportsInterface(interfaceId);
  }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library AddressUpgradeable {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` amount of tokens of type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the value of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(
        address[] calldata accounts,
        uint256[] calldata ids
    ) external view returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers a `value` amount of tokens of type `id` from `from` to `to`.
     *
     * WARNING: This function can potentially allow a reentrancy attack when transferring tokens
     * to an untrusted contract, when invoking {onERC1155Received} on the receiver.
     * Ensure to follow the checks-effects-interactions pattern and consider employing
     * reentrancy guards when interacting with untrusted contracts.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `value` amount.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(address from, address to, uint256 id, uint256 value, bytes calldata data) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     *
     * WARNING: This function can potentially allow a reentrancy attack when transferring tokens
     * to an untrusted contract, when invoking {onERC1155BatchReceived} on the receiver.
     * Ensure to follow the checks-effects-interactions pattern and consider employing
     * reentrancy guards when interacting with untrusted contracts.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `values` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../utils/introspection/IERC165.sol";

/**
 * @dev Interface that must be implemented by smart contracts in order to receive
 * ERC-1155 token transfers.
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.20;

import {IERC165} from "../../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 address zero.
     *
     * 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
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.20;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be
     * reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)

pragma solidity ^0.8.20;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev The ETH balance of the account is not enough to perform the operation.
     */
    error AddressInsufficientBalance(address account);

    /**
     * @dev There's no code at `target` (it is not a contract).
     */
    error AddressEmptyCode(address target);

    /**
     * @dev A call to an address target failed. The target may have reverted.
     */
    error FailedInnerCall();

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        if (address(this).balance < amount) {
            revert AddressInsufficientBalance(address(this));
        }

        (bool success, ) = recipient.call{value: amount}("");
        if (!success) {
            revert FailedInnerCall();
        }
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason or custom error, it is bubbled
     * up by this function (like regular Solidity function calls). However, if
     * the call reverted with no returned reason, this function reverts with a
     * {FailedInnerCall} error.
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        if (address(this).balance < value) {
            revert AddressInsufficientBalance(address(this));
        }
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
     * was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
     * unsuccessful call.
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata
    ) internal view returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            // only check if target is a contract if the call was successful and the return data is empty
            // otherwise we already know that it was a contract
            if (returndata.length == 0 && target.code.length == 0) {
                revert AddressEmptyCode(target);
            }
            return returndata;
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
     * revert reason or with a default {FailedInnerCall} error.
     */
    function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
        if (!success) {
            _revert(returndata);
        } else {
            return returndata;
        }
    }

    /**
     * @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
     */
    function _revert(bytes memory returndata) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert FailedInnerCall();
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol)

pragma solidity ^0.8.20;

import {IERC165} from "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)

pragma solidity ^0.8.20;

/**
 * @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 OR Apache-2.0
pragma solidity ^0.8.18;

interface IWorldsInventoryBySplit {
  function soldInWorldBySplit(
    address market,
    uint256 value
  ) external returns (address payable worldPaymentAddress, uint256 curatorTakeInWei);

  function soldInWorldBySplitWorldPaymentFailed(address market, uint256 valueInWei) external;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.18;

interface IWorldSplit {
  function initialize(address payable ownerAndAssetRecipient) external;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.18;

/// From https://eips.ethereum.org/EIPS/eip-173

/// @title ERC-173 Contract Ownership Standard
///  Note: the ERC-165 identifier for this interface is 0x7f5828d0
interface IOwnable {
  /// @notice Get the address of the owner
  /// @return The address of the owner.
  function owner() external view returns (address);

  /// @notice Set the address of the new owner of the contract
  /// @dev Set _newOwner to address(0) to renounce any ownership.
  /// @param _newOwner The address of the new owner of the contract
  function transferOwnership(address _newOwner) external;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.18;

error RouteCallLibrary_Call_Failed_Without_Revert_Reason();

/**
 * @title A library for calling external contracts with an address appended to the calldata.
 * @author HardlyDifficult
 */
library RouteCallLibrary {
  /**
   * @notice Routes a call to the specified contract, appending the from address to the end of the calldata.
   * If the call reverts, this will revert the transaction and the original reason is bubbled up.
   * @param from The address to use as the msg sender when calling the contract.
   * @param to The contract address to call.
   * @param callData The call data to use when calling the contract, without the sender appended.
   */
  function routeCallTo(address from, address to, bytes memory callData) internal returns (bytes memory returnData) {
    // Forward the call, with the packed from address appended, to the specified contract.
    bool success;
    (success, returnData) = tryRouteCallTo(from, to, callData);

    // If the call failed, bubble up the revert reason.
    if (!success) {
      revertWithError(returnData);
    }
  }

  /**
   * @notice Routes a call to the specified contract, appending the from address to the end of the calldata.
   * This will not revert even if the external call fails.
   * @param from The address to use as the msg sender when calling the contract.
   * @param to The contract address to call.
   * @param callData The call data to use when calling the contract, without the sender appended.
   * @dev Consumers should look for positive confirmation that if the transaction is not successful, the returned revert
   * reason is expected as an acceptable reason to ignore. Generically ignoring reverts will lead to out-of-gas errors
   * being ignored and result in unexpected behavior.
   */
  function tryRouteCallTo(
    address from,
    address to,
    bytes memory callData
  ) internal returns (bool success, bytes memory returnData) {
    // Forward the call, with the packed from address appended, to the specified contract.
    // solhint-disable-next-line avoid-low-level-calls
    (success, returnData) = to.call(abi.encodePacked(callData, from));
  }

  /**
   * @notice Bubbles up the original revert reason of a low-level call failure where possible.
   * @dev Copied from OZ's `Address.sol` library, with a minor modification to the final revert scenario.
   * This should only be used when a low-level call fails.
   */
  function revertWithError(bytes memory returnData) internal pure {
    // Look for revert reason and bubble it up if present
    if (returnData.length > 0) {
      // The easiest way to bubble the revert reason is using memory via assembly
      /// @solidity memory-safe-assembly
      assembly {
        let returnData_size := mload(returnData)
        revert(add(32, returnData), returnData_size)
      }
    } else {
      revert RouteCallLibrary_Call_Failed_Without_Revert_Reason();
    }
  }

  /**
   * @notice Extracts the appended sender address from the calldata.
   * @dev This uses the last 20 bytes of the calldata, with no guarantees that an address has indeed been appended.
   * If this is used for a call that was not routed with `routeCallTo`, the address returned will be incorrect (and
   * may be address(0)).
   */
  function extractAppendedSenderAddress() internal pure returns (address sender) {
    assembly {
      // The router appends the msg.sender to the end of the calldata
      // source: https://github.com/opengsn/gsn/blob/v3.0.0-beta.3/packages/contracts/src/ERC2771Recipient.sol#L48
      sender := shr(96, calldataload(sub(calldatasize(), 20)))
    }
  }
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.18;

/// Constant values shared across mixins.

/**
 * @dev 100% in basis points.
 */
uint256 constant BASIS_POINTS = 10_000;

/**
 * @dev The default admin role defined by OZ ACL modules.
 */
bytes32 constant DEFAULT_ADMIN_ROLE = 0x00;

////////////////////////////////////////////////////////////////
// Royalties & Take Rates
////////////////////////////////////////////////////////////////

/**
 * @dev The max take rate an exhibition can have.
 */
uint256 constant MAX_WORLD_TAKE_RATE = 5_000;

/**
 * @dev Cap the number of royalty recipients.
 * A cap is required to ensure gas costs are not too high when a sale is settled.
 */
uint256 constant MAX_ROYALTY_RECIPIENTS = 5;

/**
 * @dev Default royalty cut paid out on secondary sales.
 * Set to 10% of the secondary sale.
 */
uint96 constant ROYALTY_IN_BASIS_POINTS = 1_000;

/**
 * @dev Reward paid to referrers when a sale is made.
 * Set to 1% of the sale amount. This 1% is deducted from the protocol fee.
 */
uint96 constant BUY_REFERRER_IN_BASIS_POINTS = 100;

/**
 * @dev 10%, expressed as a denominator for more efficient calculations.
 */
uint256 constant ROYALTY_RATIO = BASIS_POINTS / ROYALTY_IN_BASIS_POINTS;

/**
 * @dev 1%, expressed as a denominator for more efficient calculations.
 */
uint256 constant BUY_REFERRER_RATIO = BASIS_POINTS / BUY_REFERRER_IN_BASIS_POINTS;

////////////////////////////////////////////////////////////////
// Gas Limits
////////////////////////////////////////////////////////////////

/**
 * @dev The gas limit used when making external read-only calls.
 * This helps to ensure that external calls does not prevent the market from executing.
 */
uint256 constant READ_ONLY_GAS_LIMIT = 40_000;

/**
 * @dev The gas limit to send ETH to multiple recipients, enough for a 5-way split.
 */
uint256 constant SEND_VALUE_GAS_LIMIT_MULTIPLE_RECIPIENTS = 210_000;

/**
 * @dev The gas limit to send ETH to a single recipient, enough for a contract with a simple receiver.
 */
uint256 constant SEND_VALUE_GAS_LIMIT_SINGLE_RECIPIENT = 20_000;

////////////////////////////////////////////////////////////////
// Collection Type Names
////////////////////////////////////////////////////////////////

/**
 * @dev The NFT collection type.
 */
string constant NFT_COLLECTION_TYPE = "NFT Collection";

/**
 * @dev The NFT drop collection type.
 */
string constant NFT_DROP_COLLECTION_TYPE = "NFT Drop Collection";

/**
 * @dev The NFT timed edition collection type.
 */
string constant NFT_TIMED_EDITION_COLLECTION_TYPE = "NFT Timed Edition Collection";

/**
 * @dev The NFT limited edition collection type.
 */
string constant NFT_LIMITED_EDITION_COLLECTION_TYPE = "NFT Limited Edition Collection";

////////////////////////////////////////////////////////////////
// Business Logic
////////////////////////////////////////////////////////////////

/**
 * @dev Limits scheduled start/end times to be less than 2 years in the future.
 */
uint256 constant MAX_SCHEDULED_TIME_IN_THE_FUTURE = 365 days * 2;

/**
 * @dev The minimum increase of 10% required when making an offer or placing a bid.
 */
uint256 constant MIN_PERCENT_INCREMENT_DENOMINATOR = BASIS_POINTS / 1_000;

/**
 * @dev Protocol fee for edition mints in basis points.
 */
uint256 constant EDITION_PROTOCOL_FEE_IN_BASIS_POINTS = 500;

/**
 * @dev Hash of the edition type names.
 * This is precalculated in order to save gas on use.
 * `keccak256(abi.encodePacked(NFT_TIMED_EDITION_COLLECTION_TYPE))`
 */
bytes32 constant timedEditionTypeHash = 0xee2afa3f960e108aca17013728aafa363a0f4485661d9b6f41c6b4ddb55008ee;

bytes32 constant limitedEditionTypeHash = 0x7df1f68d01ab1a6ee0448a4c3fbda832177331ff72c471b12b0051c96742eef5;

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.18;

import "@openzeppelin/contracts-upgradeable/utils/AddressUpgradeable.sol";

error WorldsNftNode_Worlds_NFT_Is_Not_A_Contract();

/**
 * @title Stores a reference to the Worlds NFT contract for contracts to leverage.
 * @author HardlyDifficult
 */
abstract contract WorldsNftNode {
  using AddressUpgradeable for address;

  address internal immutable worlds;

  constructor(address worldsNft) {
    if (!worldsNft.isContract()) {
      revert WorldsNftNode_Worlds_NFT_Is_Not_A_Contract();
    }

    worlds = worldsNft;
  }

  /**
   * @notice Returns the address of the Worlds NFT contract.
   */
  function getWorldsNftAddress() external view returns (address worldsNft) {
    worldsNft = worlds;
  }

  // This mixin uses 0 slots.
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.18;

// Slightly modified from:
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
// in order to simplify & optimize for our use case.
// Removes renounceOwnership, comments for our use case, updates errors, adds supportsInterface to be EIP-173 compliant.

import { ERC165 } from "@openzeppelin/contracts-v5/utils/introspection/ERC165.sol";
import { IOwnable } from "../../../interfaces/standards/IOwnable.sol";

/**
 * @title Defines an owner for the contract which receives assets sent to this address.
 * @author OpenZeppelin & HardlyDifficult
 */
abstract contract Ownable2Step is IOwnable, ERC165 {
  /// @notice The current owner of the contract.
  address private _owner;

  /// @notice The account which may accept an ownership transfer, or address(0) if there is no pending transfer.
  address private _pendingOwner;

  /// @notice Emitted when ownership of a contract changes, including when the contract is initially deployed.
  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

  /// @notice Emitted when an ownership transfer is initiated. `newOwner` is set to 0 if a pending transfer is canceled.
  event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);

  error Ownable_Already_Initialized(address currentOwner);
  error Ownable_Not_Pending_Owner(address currentPendingOwner);
  error Ownable_Sender_Is_Not_Owner(address currentOwner);
  error Ownable_Transfer_To_Already_Initiated(address currentPendingOwner);

  ////////////////////////////////////////////////////////////////
  // Ownership
  ////////////////////////////////////////////////////////////////

  /// @notice Reverts if called by any account other than the owner.
  modifier onlyOwner() {
    if (_owner != msg.sender) {
      revert Ownable_Sender_Is_Not_Owner(_owner);
    }
    _;
  }

  /// @notice Reverts if called after an owner has already been assigned.
  /// @dev Used to determine if the contract has already been initialized.
  modifier onlyUnassignedOwner() {
    if (_owner != address(0)) {
      revert Ownable_Already_Initialized(_owner);
    }
    _;
  }

  /**
   * @notice Returns the address of the current owner which receives assets sent to this address.
   */
  function owner() public view returns (address ownerAndAssetRecipient) {
    ownerAndAssetRecipient = _owner;
  }

  ////////////////////////////////////////////////////////////////
  // Transfer flow
  ////////////////////////////////////////////////////////////////

  /**
   * @notice Transfers ownership of the contract to a new account (`newOwner`).
   * @dev Can only be called by the current owner.
   */
  function transferOwnership(address newOwner) external onlyOwner {
    if (newOwner == _pendingOwner) {
      revert Ownable_Transfer_To_Already_Initiated(_pendingOwner);
    }

    _pendingOwner = newOwner;
    emit OwnershipTransferStarted(_owner, newOwner);
  }

  /**
   * @notice Accept a pending transfer, making the caller the new owner which receives assets sent to this address.
   */
  function acceptOwnership() external {
    if (_pendingOwner != msg.sender) {
      revert Ownable_Not_Pending_Owner(_pendingOwner);
    }
    _transferOwnership(msg.sender);
  }

  /**
   * @notice Transfers ownership of the contract to a new account (`newOwner`).
   * @dev Internal function without access restriction.
   * Used on initialize to set the original owner.
   */
  function _transferOwnership(address newOwner) internal {
    address oldOwner = _owner;
    _owner = newOwner;
    emit OwnershipTransferred(oldOwner, newOwner);
    delete _pendingOwner;
  }

  /**
   * @notice Returns the address of the pending owner.
   * @dev Returns address(0) if there is no pending owner.
   */
  function pendingOwner() external view returns (address currentPendingOwner) {
    currentPendingOwner = _pendingOwner;
  }

  ////////////////////////////////////////////////////////////////
  // ERC165
  ////////////////////////////////////////////////////////////////

  function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool isSupported) {
    isSupported = interfaceId == type(IOwnable).interfaceId || super.supportsInterface(interfaceId);
  }
}

{
  "evmVersion": "shanghai",
  "optimizer": {
    "enabled": true,
    "runs": 1337000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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