PKTInfra

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// 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) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.20;

import {IERC721} from "./IERC721.sol";
import {IERC721Receiver} from "./IERC721Receiver.sol";
import {IERC721Metadata} from "./extensions/IERC721Metadata.sol";
import {Context} from "../../utils/Context.sol";
import {Strings} from "../../utils/Strings.sol";
import {IERC165, ERC165} from "../../utils/introspection/ERC165.sol";
import {IERC721Errors} from "../../interfaces/draft-IERC6093.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
abstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors {
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    mapping(uint256 tokenId => address) private _owners;

    mapping(address owner => uint256) private _balances;

    mapping(uint256 tokenId => address) private _tokenApprovals;

    mapping(address owner => mapping(address operator => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual returns (uint256) {
        if (owner == address(0)) {
            revert ERC721InvalidOwner(address(0));
        }
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual returns (address) {
        return _requireOwned(tokenId);
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual returns (string memory) {
        _requireOwned(tokenId);

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overridden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual {
        _approve(to, tokenId, _msgSender());
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual returns (address) {
        _requireOwned(tokenId);

        return _getApproved(tokenId);
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(address from, address to, uint256 tokenId) public virtual {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
        // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
        address previousOwner = _update(to, tokenId, _msgSender());
        if (previousOwner != from) {
            revert ERC721IncorrectOwner(from, tokenId, previousOwner);
        }
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {
        transferFrom(from, to, tokenId);
        _checkOnERC721Received(from, to, tokenId, data);
    }

    /**
     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
     *
     * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the
     * core ERC721 logic MUST be matched with the use of {_increaseBalance} to keep balances
     * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by
     * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.
     */
    function _getApproved(uint256 tokenId) internal view virtual returns (address) {
        return _tokenApprovals[tokenId];
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in
     * particular (ignoring whether it is owned by `owner`).
     *
     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
     * assumption.
     */
    function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {
        return
            spender != address(0) &&
            (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);
    }

    /**
     * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.
     * Reverts if `spender` does not have approval from the provided `owner` for the given token or for all its assets
     * the `spender` for the specific `tokenId`.
     *
     * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not verify this
     * assumption.
     */
    function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {
        if (!_isAuthorized(owner, spender, tokenId)) {
            if (owner == address(0)) {
                revert ERC721NonexistentToken(tokenId);
            } else {
                revert ERC721InsufficientApproval(spender, tokenId);
            }
        }
    }

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that
     * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.
     *
     * WARNING: Increasing an account's balance using this function tends to be paired with an override of the
     * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership
     * remain consistent with one another.
     */
    function _increaseBalance(address account, uint128 value) internal virtual {
        unchecked {
            _balances[account] += value;
        }
    }

    /**
     * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner
     * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.
     *
     * The `auth` argument is optional. If the value passed is non 0, then this function will check that
     * `auth` is either the owner of the token, or approved to operate on the token (by the owner).
     *
     * Emits a {Transfer} event.
     *
     * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.
     */
    function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {
        address from = _ownerOf(tokenId);

        // Perform (optional) operator check
        if (auth != address(0)) {
            _checkAuthorized(from, auth, tokenId);
        }

        // Execute the update
        if (from != address(0)) {
            // Clear approval. No need to re-authorize or emit the Approval event
            _approve(address(0), tokenId, address(0), false);

            unchecked {
                _balances[from] -= 1;
            }
        }

        if (to != address(0)) {
            unchecked {
                _balances[to] += 1;
            }
        }

        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        return from;
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        address previousOwner = _update(to, tokenId, address(0));
        if (previousOwner != address(0)) {
            revert ERC721InvalidSender(address(0));
        }
    }

    /**
     * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
        _mint(to, tokenId);
        _checkOnERC721Received(address(0), to, tokenId, data);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     * This is an internal function that does not check if the sender is authorized to operate on the token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal {
        address previousOwner = _update(address(0), tokenId, address(0));
        if (previousOwner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        }
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(address from, address to, uint256 tokenId) internal {
        if (to == address(0)) {
            revert ERC721InvalidReceiver(address(0));
        }
        address previousOwner = _update(to, tokenId, address(0));
        if (previousOwner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        } else if (previousOwner != from) {
            revert ERC721IncorrectOwner(from, tokenId, previousOwner);
        }
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients
     * are aware of the ERC721 standard to prevent tokens from being forever locked.
     *
     * `data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is like {safeTransferFrom} in the sense that it invokes
     * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `tokenId` token must exist and be owned by `from`.
     * - `to` cannot be the zero address.
     * - `from` cannot be the zero address.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(address from, address to, uint256 tokenId) internal {
        _safeTransfer(from, to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
        _transfer(from, to, tokenId);
        _checkOnERC721Received(from, to, tokenId, data);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is
     * either the owner of the token, or approved to operate on all tokens held by this owner.
     *
     * Emits an {Approval} event.
     *
     * Overrides to this logic should be done to the variant with an additional `bool emitEvent` argument.
     */
    function _approve(address to, uint256 tokenId, address auth) internal {
        _approve(to, tokenId, auth, true);
    }

    /**
     * @dev Variant of `_approve` with an optional flag to enable or disable the {Approval} event. The event is not
     * emitted in the context of transfers.
     */
    function _approve(address to, uint256 tokenId, address auth, bool emitEvent) internal virtual {
        // Avoid reading the owner unless necessary
        if (emitEvent || auth != address(0)) {
            address owner = _requireOwned(tokenId);

            // We do not use _isAuthorized because single-token approvals should not be able to call approve
            if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {
                revert ERC721InvalidApprover(auth);
            }

            if (emitEvent) {
                emit Approval(owner, to, tokenId);
            }
        }

        _tokenApprovals[tokenId] = to;
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Requirements:
     * - operator can't be the address zero.
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
        if (operator == address(0)) {
            revert ERC721InvalidOperator(operator);
        }
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Reverts if the `tokenId` doesn't have a current owner (it hasn't been minted, or it has been burned).
     * Returns the owner.
     *
     * Overrides to ownership logic should be done to {_ownerOf}.
     */
    function _requireOwned(uint256 tokenId) internal view returns (address) {
        address owner = _ownerOf(tokenId);
        if (owner == address(0)) {
            revert ERC721NonexistentToken(tokenId);
        }
        return owner;
    }

    /**
     * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the
     * recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param data bytes optional data to send along with the call
     */
    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private {
        if (to.code.length > 0) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                if (retval != IERC721Receiver.onERC721Received.selector) {
                    revert ERC721InvalidReceiver(to);
                }
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert ERC721InvalidReceiver(to);
                } else {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.20;

import {ERC721} from "../ERC721.sol";
import {IERC721Enumerable} from "./IERC721Enumerable.sol";
import {IERC165} from "../../../utils/introspection/ERC165.sol";

/**
 * @dev This implements an optional extension of {ERC721} defined in the EIP that adds enumerability
 * of all the token ids in the contract as well as all token ids owned by each account.
 *
 * CAUTION: `ERC721` extensions that implement custom `balanceOf` logic, such as `ERC721Consecutive`,
 * interfere with enumerability and should not be used together with `ERC721Enumerable`.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    mapping(address owner => mapping(uint256 index => uint256)) private _ownedTokens;
    mapping(uint256 tokenId => uint256) private _ownedTokensIndex;

    uint256[] private _allTokens;
    mapping(uint256 tokenId => uint256) private _allTokensIndex;

    /**
     * @dev An `owner`'s token query was out of bounds for `index`.
     *
     * NOTE: The owner being `address(0)` indicates a global out of bounds index.
     */
    error ERC721OutOfBoundsIndex(address owner, uint256 index);

    /**
     * @dev Batch mint is not allowed.
     */
    error ERC721EnumerableForbiddenBatchMint();

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
        return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual returns (uint256) {
        if (index >= balanceOf(owner)) {
            revert ERC721OutOfBoundsIndex(owner, index);
        }
        return _ownedTokens[owner][index];
    }

    /**
     * @dev See {IERC721Enumerable-totalSupply}.
     */
    function totalSupply() public view virtual returns (uint256) {
        return _allTokens.length;
    }

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual returns (uint256) {
        if (index >= totalSupply()) {
            revert ERC721OutOfBoundsIndex(address(0), index);
        }
        return _allTokens[index];
    }

    /**
     * @dev See {ERC721-_update}.
     */
    function _update(address to, uint256 tokenId, address auth) internal virtual override returns (address) {
        address previousOwner = super._update(to, tokenId, auth);

        if (previousOwner == address(0)) {
            _addTokenToAllTokensEnumeration(tokenId);
        } else if (previousOwner != to) {
            _removeTokenFromOwnerEnumeration(previousOwner, tokenId);
        }
        if (to == address(0)) {
            _removeTokenFromAllTokensEnumeration(tokenId);
        } else if (previousOwner != to) {
            _addTokenToOwnerEnumeration(to, tokenId);
        }

        return previousOwner;
    }

    /**
     * @dev Private function to add a token to this extension's ownership-tracking data structures.
     * @param to address representing the new owner of the given token ID
     * @param tokenId uint256 ID of the token to be added to the tokens list of the given address
     */
    function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
        uint256 length = balanceOf(to) - 1;
        _ownedTokens[to][length] = tokenId;
        _ownedTokensIndex[tokenId] = length;
    }

    /**
     * @dev Private function to add a token to this extension's token tracking data structures.
     * @param tokenId uint256 ID of the token to be added to the tokens list
     */
    function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
        _allTokensIndex[tokenId] = _allTokens.length;
        _allTokens.push(tokenId);
    }

    /**
     * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
     * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
     * gas optimizations e.g. when performing a transfer operation (avoiding double writes).
     * This has O(1) time complexity, but alters the order of the _ownedTokens array.
     * @param from address representing the previous owner of the given token ID
     * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
     */
    function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
        // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = balanceOf(from);
        uint256 tokenIndex = _ownedTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary
        if (tokenIndex != lastTokenIndex) {
            uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];

            _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
            _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
        }

        // This also deletes the contents at the last position of the array
        delete _ownedTokensIndex[tokenId];
        delete _ownedTokens[from][lastTokenIndex];
    }

    /**
     * @dev Private function to remove a token from this extension's token tracking data structures.
     * This has O(1) time complexity, but alters the order of the _allTokens array.
     * @param tokenId uint256 ID of the token to be removed from the tokens list
     */
    function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
        // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
        // then delete the last slot (swap and pop).

        uint256 lastTokenIndex = _allTokens.length - 1;
        uint256 tokenIndex = _allTokensIndex[tokenId];

        // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
        // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
        // an 'if' statement (like in _removeTokenFromOwnerEnumeration)
        uint256 lastTokenId = _allTokens[lastTokenIndex];

        _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
        _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index

        // This also deletes the contents at the last position of the array
        delete _allTokensIndex[tokenId];
        _allTokens.pop();
    }

    /**
     * See {ERC721-_increaseBalance}. We need that to account tokens that were minted in batch
     */
    function _increaseBalance(address account, uint128 amount) internal virtual override {
        if (amount > 0) {
            revert ERC721EnumerableForbiddenBatchMint();
        }
        super._increaseBalance(account, amount);
    }
}

// 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
// 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/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.20;

import {IERC721} from "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Enumerable is IERC721 {
    /**
     * @dev Returns the total amount of tokens stored by the contract.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.
     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
     */
    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);

    /**
     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
     * Use along with {totalSupply} to enumerate all tokens.
     */
    function tokenByIndex(uint256 index) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.20;

import {IERC721} from "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

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

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

// 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 OR Apache-2

pragma solidity ^0.8.24;

import "@openzeppelin/contracts/interfaces/IERC721Metadata.sol";
import "@openzeppelin/contracts/interfaces/IERC721Enumerable.sol";

// The contract for representing Infrastructure Units
// (cjdns nodes, domains VPNs, nameservers, and route servers)
// This contract is essentially declarative. You can enter anything you want and
// it will only really have effect after it's checked if the unit is actually operational.
// Each Unit is an NFT so once you create one, you can administer it.
// The contract is also Ownable and the owner can:
// 1. Nominate "trusted" contracts which can act on others' behalf.
// 2. Set the base URI for the NFT images.
//
interface IInfra is IERC721Metadata, IERC721Enumerable {
    // The type of the infra unit
    enum UnitType {

        // Unit type zero is not valid
        Invalid,

        // Cjdns public peer with VPN disabled
        Cjdns,

        // Cjdns VPN with public peering disabled
        Vpn,

        // Cjdns public peer with VPN enabled
        CjdnsVpn,

        // Cjdns private node with VPN disabled (does not yield)
        PrivateCjdns,

        // Public domain name (e.g. pkt.wiki)
        Domain,

        // Domain name which is willing to resolve blacklisted domains
        DomainDangerous,

        // Nameserver
        Nameserver,

        // Route Server
        RouteServer,

        // Invalid item
        InvalidTooHigh
    }

    // The structure which represents an infra unit
    struct Unit {
        // For cjdns/vpn/nameserver/routeserver
        //     * Non-zero = the domain to hang this node off of
        //     * Zero = .no-name.pkt special domain
        // For domains -> Always zero
        uint64 parentDomain;

        // The type of the unit
        UnitType unitType;

        // For cjdns/vpn/nameserver/routeserver -> The hostname/subdomain
        // For domains -> The FQDN
        string name;
    }

    /**
     * Emitted when a new unit is registered, anyone can cause this to be emitted
     * it does NOT mean any infrastructure actually exists.
     * @param sender The address which make the call
     * @param newId The ID of the new unit
     * @param creator Who invoked the function
     * @param recipient Who will receive the NFT of the unit and therefore yield on it
     * @param t The type of the unit
     * @param parentDomain The ID of the domain which the unit is associated with (0 = none)
     * @param name The name of the unit
     */
    event RegisterUnit(address sender, uint newId, address creator, address recipient, UnitType t,
        uint64 parentDomain, string name);

    /**
     * Emitted when someone updates some data about their infra unit.
     * @param sender The address which make the call
     * @param id The ID of the updated unit
     * @param updateMask A bitmask of items which are being updated,
     *                   see: Infra.UPDATE_TYPE, Infra.UPDATE_DOMAIN, Infra.UPDATE_NAME
     * @param t The unit type to change to, if applicable
     * @param parentDomain The new parent domain, if applicable
     * @param name The name to change to, if applicable
     */
    event UpdateUnit(address sender, uint id, uint8 updateMask, UnitType t, uint64 parentDomain, string name);

    /// Emitted when a unit is deleted
    /// 
    /// @param sender The address which make the call
    /// @param id The ID of the unit to be deleted
    event DeleteUnit(address sender, uint id);

    /// The unit got evicted by the domain holder.
    /// 
    /// @param sender The address which made the call
    /// @param id The ID of the unit that was evicted
    event DomainEvict(address sender, uint id);

    // Create/Update/Delete

    /**
     * Register a new unit.
     * Anyone can call this, it does not imply that the underlying infrastructure actually exists.
     *
     * @param t The type of the unit to register.
     * @param parentDomain The parent domain (0 = none), the caller must have authorization to
     *                     manipulate this domain, or if the caller is a trusted contract, the
     *                     recipient (to) must have same authority instead.
     * @param name The name / subdomain of the unit.
     * @param to Who will receive the resulting NFT and begin yielding on the infra unit.
     * @return The ID of the unit.
     */
    function registerUnit(
        UnitType t,
        uint64 parentDomain,
        string calldata name,
        address to
    ) external returns (uint);

    /**
     * Update data about an infra unit.
     *
     * @param id The ID of the unit to update, the caller must be authoritative over the unit.
     *           If the caller is a trusted contract (see trustContract()) then onBehalfOf may
     *           be substituted.
     * @param update The bitmask of fields to update
     *               see: Infra.UPDATE_TYPE, Infra.UPDATE_DOMAIN, Infra.UPDATE_NAME
     * @param t The type to change the item to, if applicable
     * @param parentDomain The parent domain to set, if applicable. The caller (or onBehalfOf) must
     *                     be authoritative over the domain in order to set it.
     * @param name The subdomain / name of the unit.
     * @param onBehalfOf If called from a trusted contract, authority to alter the Unit and associate
     *                   with the parentDomain will be based on this address, otherwise it is based on
     *                   the caller. If you're not a trusted contract, just pass zero.
     */
    function updateUnit(
        uint id,
        uint8 update,
        UnitType t,
        uint64 parentDomain,
        string calldata name,
        address onBehalfOf
    ) external;

    /**
     * Delete a unit.
     *
     * @param id The ID of the unit to delete.
     * @param onBehalfOf If this is being called by a trusted contract, this is the address to
     *                   impersonate, otherwise you may ignore it and pass address(0).
     */
    function deleteUnit(uint id, address onBehalfOf) external;

    /**
     * Evict a unit from being associated with your parentDomain.
     * This can be called by the owner of the domain, even if they do not have authority over the unit.
     * A possible reason why a domain holder would not have authority over the unit is because either
     * the domain, or the unit, was transferred. This allows the domain holder to evict the unit so it
     * will not affect their domain.
     *
     * @param id The ID of the unit to evict.
     */
    function domainEviction(uint id) external;

    // Read

    /**
     * Get a single unit by ID.
     *
     * @param id The ID of the unit to get.
     * @return t The type of the unit, if zero then this unit does not exist.
     * @return parentDomain The parent domain of the unit.
     * @return name The name of the unit.
     * @return owner The owner of the unit.
     */
    function getUnit(uint id) external view returns (
        UnitType t,
        uint64 parentDomain,
        string memory name,
        address owner
    );

    /**
     * Get multiple units by ID.
     *
     * @param ids An array of the IDs of units to get.
     * @return out An array of the resulting units.
     * @return owners An array of the owners of units, address(0) means there is a unit that was deleted.
     */
    function getUnits(
        uint[] calldata ids
    ) external view returns (
        Unit[] memory out,
        address[] memory owners
    );

    /**
     * Check whether an address is considered a trusted contract.
     * Trusted addresses can impersonate other addresses for the purpose of the
     * registerUnit() updateUnit() and deleteUnit() functions.
     * 
     * @param c The address to check
     * @return trusted whether or not the address is trusted to impersonate others
     */
    function isTrustedContract(address c) external view returns (bool trusted);

    /**
     * @return The next higher Unit id to issue
     */
    function nextId() external view returns (uint);

    /**
     * Access the free list of unit IDs.
     *
     * @param last The last ID, if zero then this gives the list head
     * @return id The next ID in the list
     */
    function idFreeList(uint64 last) external view returns (uint id);

    // Administrative

    /**
     * Update the URI prefix for rendering of NFT images.
     * Can only be called by the owner of the contract.
     *
     * @param pfx New URI prefix.
     */
    function setUriPrefix(string calldata pfx) external;

    /**
     * Set the trusted status of an address. Trusted addresses (contracts) can impersonate other
     * addresses for the purpose of the registerUnit() updateUnit() and deleteUnit() functions.
     *
     * @param c The address
     * @param trusted True if the address should be trusted.
     */
    function trustContract(address c, bool trusted) external;

    /**
     * Change the DNS contract, in case it needs to be upgraded.
     *
     * @param pns The new PNS contract address.
     */
    function setPns(address pns) external;
}

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity ^0.8.24;

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

interface ILockBox is IERC721 {
    function lockups(
        uint256 lockupId
    )
        external
        view
        returns (
            uint256 amountAsset,
            uint256 amountLpToken,
            uint256 lpTokenValuation,
            uint256 assetSecondsLocked,
            uint256 lpSecondsLocked,
            uint64 createTime,
            uint64 lastDepositTime,
            uint64 durationSeconds,
            bool autoRelock
        );
}

// SPDX-License-Identifier: MIT OR Apache-2

pragma solidity ^0.8.24;

import "../external/ILockBox.sol";

interface IPNS {

    // Events

    /// A pre-registration was created
    /// @param sender who did the preregistration
    /// @param nameHash The hash of the lockup ID, name, and initial records.
    /// @param lockupId The lockup ID that is included in the hash.
    event Preregister(address sender, bytes32 nameHash, uint64 lockupId);

    /// A preregistraton was deleted
    /// @param sender who destroyed the preregistration
    /// @param nameHash The hash of the lockup ID, name, and initial records.
    /// @param lockupId The lockup ID.
    event DestroyPrereg(address sender, bytes32 nameHash, uint64 lockupId);

    /// A domain was registered
    /// @param sender who registered the domain (not necessarily the owner)
    /// @param id The ID of the new domain
    /// @param lockupId The lockup ID of the lockbox that owns the domain
    /// @param name The domain name itself
    /// @param records Initial records that were associated with the domain
    event Register(address sender, uint64 id, uint64 lockupId, bytes name, bytes records);

    /// Domain records were updated
    /// @param sender who updated the records
    /// @param id The ID of the (sub)domain
    /// @param records The new records to enter
    event UpdateRecords(address sender, uint64 id, bytes records);

    /// A domain was taken over, this means either the owner is switching it to a different lockup
    /// or the owner unlocked the lockup and so now it is up for grabs and someone took it.
    /// @param sender who did the takeover
    /// @param id The domain ID
    /// @param oldLockupId The old lockup ID
    /// @param newLockupId The new lockup ID
    /// @param records new records that were assigned
    event Takeover(address sender, uint64 id, uint64 oldLockupId, uint64 newLockupId, bytes records);

    /// The owner of the domain has created a subdomain
    /// @param sender who made the subdomain
    /// @param id The ID of the subdomain
    /// @param parentId The ID of the domain
    /// @param name The fully qualified domain name of the subdomain
    /// @param records The initial DNS records to set for the subdomain
    event CreateSubdomain(address sender, uint64 id, uint64 parentId, bytes name, bytes records);

    /// A domain or subdomain has been deleted.
    /// This could be done by the owner of the domain, or in the case that the underlying lockup was
    /// unlocked, this could be done by anyone - the same as takeover.
    /// @param sender who did the operation.
    /// @param id the ID of the (sub)domain.
    event Destroy(address sender, uint64 id);

    /// A (sub)domain was blacklisted or unblacklisted.
    /// @param sender Who did the operation
    /// @param id The ID of the domain
    /// @param isBlacklisted True if the operation has made the domain blacklisted.
    event Blacklist(address sender, uint64 id, bool isBlacklisted);

    /// The stored representation of a domain or subdomain.
    struct Domain {
        /// If this is a top level domain, then this is the lockup id of the owner.
        /// If this is a subdomain, then this is the ID of the top level domain.
        uint64 owner;

        /// Number of subdomains, if 0xff then this IS a subdomain.
        uint8 subdomains;

        /// True if the admin has marked this domain as blacklisted for the purpose of public resolvers.
        bool blacklisted;

        /// The FQDN of this domain (excluding .pkt. at the end)
        bytes name;

        /// Binary encoded representation of the records as updated by the owner
        bytes records;
    }

    /// The lockbox of which the lockup holder is the owner and controller of the domain.
    function lockboxContract() external returns (ILockBox);

    /// The minimum amount of value that you must have locked in order to register / preregister
    /// a domain. This starts at double the amount of the previous registration, and it decays
    /// by 50% per halvingSeconds seconds.
    function currentMinLockup() external view returns (uint256 price);

    /// Get the value of assets in a given lockbox.
    /// This function does not care whether the lockbox is staked for a time period or is even matured,
    /// only that it is not withdrawn, because when it is withdrawn the lockup entry is deleted so
    /// the values becomes zero.
    function getLockupValuation(uint256 lockupId) external view returns (uint256);

    /// Compute the hash which must be passed to preregister as the nameHash.
    /// 
    /// @param lockupId The lockup which will become the owner of the domain.
    /// @param name The domain name, dots are forbidden in domain names because they would interfere
    ///             with other people creating subdomains. Other than that, no error checking is done
    ///             at the contract level, but capital letters or disallowed characters will result in
    ///             a domain that cannot be resolved.
    /// @param records A byte array which represents a packed list of DNS records which will be used.
    /// @return nameHash A hash that can be used for calling preregister()
    function computePreregHash(
        uint64 lockupId,
        bytes calldata name,
        bytes calldata records
    ) external pure returns (bytes32);

    /// In order to prevent malicious actors from watching for unconfirmed name registrations and
    /// frontrunning them with their own, you are required to pre-register before you register a name.
    /// You pre-register by passing in the nameHash (which you can compute with computePreregHash()) plus
    /// the lockup ID of the lockup that you plan to use for this name.
    /// Preregistrations are valid for 24 hours, or until the underlying lockup is unstaked. After either
    /// of these events, preregistrations are nolonger usable and can be removed by anyone by calling
    /// destroyPrereg().
    /// 
    /// @param nameHash The hash of the name, lockupId, and records you intend to insert. Can be computed
    ///                 using computePreregHash()
    /// @param lockupId The id of the lockup which should take ownership of this domain, you must own this
    ///                 lockup in order to pre-register. This lockup's value (i.e. getLockupValuation()) must
    ///                 be at least equal to currentMinLockup(). This lockup must not have been used to
    ///                 register any other currently active domain. Ownership of the domain can be switched
    ///                 to a different lockup using the takeover() function, but that lockup must have a
    ///                 value of at least currentMinLockup() AT THE TIME OF takeover().
    ///                 If the lockup is unstaked while the domain is active, anyone with a qualifying lockup
    ///                 will be able to takeover() the domain, and anyone at all will be able to destroy() it.
    ///                 This id MUST match the one passed to computePreregHash() or else register() will fail.
    function preregister(bytes32 nameHash, uint64 lockupId) external;

    /// A preregistration can be removed under one of the following three conditions:
    /// 1. It has expired (it is more than 24 hours old)
    /// 2. The lockup which owns it has been unstaked
    /// 3. You are authorized to administer the lockup (normally meaning, you're the owner)
    ///
    /// The arguments to this function are the same as those to preregister().
    function destroyPrereg(bytes32 nameHash, uint64 lockupId) external;

    /// After pre-registering, you can register your domain. You cannot register in the same block as
    /// pre-registering because that would enable front-running attacks. This function can be called by
    /// anyone, not only the person who pre-registered, but ownership will go to the person who
    /// pre-registered. The arguments to this function MUST be precisely the same as those passed to
    /// computePreregHash() when creating the pre-registration hash.
    function register(
        uint64 lockupId,
        bytes calldata name,
        bytes calldata records
    ) external;

    /// Get the lockup ID of the lockup that owns the domain.
    ///
    /// @param id The ID of the domain
    /// @return The lockbox ID of the owner lockup
    function ownerLockup(uint64 id) external view returns (uint64);

    /// Check if a given address is authorized to manipulate the lockup which underlies this domain.
    /// See: ERC-721 getApproved() and isApprovedForAll()
    /// 
    /// @param id The ID of the domain
    /// @param who The address to check
    /// @return true if the address is authorized
    function authorizedFor(uint64 id, address who) external view returns (bool);

    /// Update the DNS records for a domain or subdomain.
    /// This can only be called by an authorized party for the lockup that owns the domain.
    /// 
    /// @param id The id of the domain or subdomain, use getDomainIdByFQDN() to look it up.
    /// @param records A binary packed representation of the domain records.
    function updateRecords(
        uint64 id,
        bytes calldata records
    ) external;

    /// Take over a domain which is either your own, and you are switching which lockup is
    /// associated with the domain, or it is somebody elses and they have unstaked their lockup.
    /// In order to takeover a domain, you must have the same lockup valuation that you would need to
    /// preregister.
    /// You cannot takeover a subdomain, but after you have taken over the parent domain, you can then
    /// updateRecords() and/or destroy() any of it's subdomains as you are now the owner.
    /// 
    /// @param id The ID of the domain.
    /// @param newLockupId The lockup ID that you wish to associate to this domain.
    /// @param records New domain records which you wish to set to this domain. If this is an empty array
    ///                then the domain's records will remain unchanged.
    function takeover(
        uint64 id,
        uint64 newLockupId,
        bytes calldata records
    ) external;

    /// Create a subdomain of your domain.
    /// To create a subdomain, you must own the parent domain. You cannot create a subdomain of a subdomain
    /// but you can create a subdomain with a subdomainLabel that has dots in it, for example
    /// "the.coolest.subdomain" under domain "cjd" will resolve as "the.coolest.subdomain.cjd(.pkt)".
    /// Subdomains cannot be sold off to anyone else, you, the lockbox owner, always own all subdomains
    /// because you are uniquely able to unstake and cause the domain and all of it's subdomains to be lost.
    /// Each domain can have a maximum of 254 subdomains.
    /// 
    /// @param parentId The ID of the domain underwhich to create a subdomain, use getDomainIdByFQDN() to get
    ///                 the id of your domain.
    /// @param subdomainLabel The name of the subdomain. Dots are legal in subdomain names.
    ///                       Normal DNS rules apply to naming but are not checked at the contract level.
    /// @param records A binary packed representation of the DNS records which should apply to this subdomain.
    function createSubdomain(
        uint64 parentId,
        bytes calldata subdomainLabel,
        bytes calldata records
    ) external;

    /// Destroy a domain or subdomain. A domain cannot be destroyed until after ALL of it's subdomains have
    /// been destroyed. You may destroy a domain or subdomain if you are authorized (see authorizedFor()), or
    /// if the owner has  unstaked the lockbox which controls it.
    /// 
    /// @param id The ID of the domain or subdomain to destroy, see getDomainIdByFQDN()
    function destroy(uint64 id) external;

    /// A structure allowing you to create multiple new subdomains in the same transaction.
    struct NewSubdomain {
        /// ID of the parent domain for the new subdomain.
        uint64 parentId;
        /// The subdomain label
        bytes subdomainLabel;
        /// Binary packed representation of domain records
        bytes records;
    }

    /// A structure allowing for multiple DNS record updates in a single transaction.
    struct RecordUpdate {
        /// The ID of the domain whose records should be updated.
        uint64 id;
        /// A binary packed representation of the records to update.
        bytes records;
    }

    /// Perform multiple updates in a single transaction.
    /// 
    /// @param newSubdomains New subdomains to create
    /// @param recordUpdates DNS records to update
    /// @param destroyDomains Domains / subdomains to destroy
    function updateMultiple(
        NewSubdomain[] calldata newSubdomains,
        RecordUpdate[] calldata recordUpdates,
        uint64[] calldata destroyDomains
    ) external;

    // View functions

    /// Get the next domain ID.
    /// Any ID greater than or equal to this is guaranteed not to corrispond to an existing domain.
    function nextDomainId() external view returns (uint);

    /// Observe the ID free list. Calling this with last = 0 will give you the head of the list, call with the
    /// value given to walk the list.
    function domainIdFreeList(uint64 last) external view returns (uint);

    /// Get the details of a domain by its ID.
    /// 
    /// @param id The id of the domain or subdomain to get information for, see getDomainIdByFQDN()
    /// @return owner The owner of the domain, if this is a subdomain then this is the domain ID of the parent,
    ///               otherwise it is the lockup ID of the lockup that owns the domain.
    /// @return subdomains The number of subdomains, if this is 0xff then this IS a subdomain.
    /// @return blacklisted True if the domain has been blacklisted
    /// @return name The name of the domain, if this is empty then it means the domain does not exist.
    /// @return records A binary packed representation of the domain records.
    function getDomain(uint64 id) external view returns (
        uint64 owner,
        uint8 subdomains,
        bool blacklisted,
        bytes memory name,
        bytes memory records
    );

    /// Get multiple domains in one RPC call.
    /// 
    /// @param ids The list of IDs of domains to get.
    /// @return out The domains that have been accessed. If an ID in the list doesn't exist, the resulting
    ///             Domain's `name` field will be empty.
    function getDomains(uint64[] calldata ids) external view returns (Domain[] memory out);

    /// Get the domain ID of a domain by the lockup ID of the lock box.
    /// 
    /// @param lockupId The lockup id
    /// @return The domain ID, or zero if there is no domain for this lock box.
    function getDomainIdByLockupId(uint64 lockupId) external view returns (uint64);

    /// Get the domain ID of a domain by the full domain name (except the ".pkt." suffix).
    /// 
    /// @param fqdn The domain name, for example "the.coolest.is.cjd" will get the subdomain
    ///             the.coolest.is.cjd.pkt
    /// @return The domain ID, or zero if there is no domain for this name.
    function getDomainIdByFQDN(bytes calldata fqdn) external view returns (uint64);

    /// Get the internal info about the minimum lockup value needed for registering a domain.
    /// Normally you should use currentMinLockup() but this will give you the internal state.
    /// 
    /// @return lastRegTime Time of last domain registration (seconds since the epoch)
    /// @return priceHalvingPeriodSeconds How many seconds it takes for the price to halve.
    /// @return nextMinLockup The required lockup value if another domain were to be registered
    ///                       at the same time as lastRegTime.
    function getMinLockupInfo() external view returns (
        uint64 lastRegTime,
        uint64 priceHalvingPeriodSeconds,
        uint256 nextMinLockup
    );

    /// Get the internal state of the pre-registration table. Normally you should not need this.
    /// 
    /// @param nameHash The pre-registration hash as computed by computePreregHash()
    /// @return timestamp The timestamp of the pre-registration entry.
    /// @return lockupId The lockup ID that is associated with the pre-registration.
    function getPrereg(bytes32 nameHash) external view returns (
        uint64 timestamp,
        uint64 lockupId
    );

    /// Check if a given address is whitelisted for registration right now.
    /// 
    /// @param addr The address to check.
    /// @return Whether or not the address is whitelisted.
    function isAddressWhitelisted(address addr) external view returns (bool);

    /// Check whether the address whitelist is currently active
    function isRegistrationWhitelistActive() external view returns (bool);

    /// Get the address which is currently delegated as the admin.
    function getAdmin() external view returns (address);

    // Administrative functions

    /// Set the administrator address (owner only)
    function setAdmin(address admin) external;

    /// Set the price halving time (admin only)
    function setPriceHalvingSeconds(uint64 halvingSeconds) external;

    /// A struct for adding and removing addresses from the whitelist
    struct AllowedAddress {
        /// The relevant address
        address addr;
        /// True if the address is being added, false if removed
        bool allowed;
    }

    /// Update the list of addresses which are allowed to register domains (admin only).
    /// @param allowed The list of addresses to add/remove
    /// @param activate If true, the whitelist begins enforcing, if false, then it stops enforcing.
    function updateRegistrationWhitelist(AllowedAddress[] calldata allowed, bool activate) external;

    /// Blacklist or unblacklist a domain (admin only)
    /// 
    /// @param id The ID of the domain or subdomain
    /// @param blacklisted True to blacklist, false to unblacklist
    function setDomainBlacklisted(uint64 id, bool blacklisted) external;
}

// SPDX-License-Identifier: MIT OR Apache-2

pragma solidity ^0.8.24;

library IdProvider {
    struct Ids {
        mapping(uint => uint) freeList;
        uint nextId;
    }

    // Initialize the state for IDManager
    function init(Ids storage self) internal {
        self.nextId = 1; // Start the ID counter from 1 (or whatever number you'd like)
    }

    // Take an ID, either from the free list or by incrementing the next ID
    function take(Ids storage self) internal returns (uint id) {
        id = self.freeList[0];
        if (id > 0) {
            // Reuse an ID from the free list
            self.freeList[0] = self.freeList[id];
            delete self.freeList[id];
        } else {
            // No free IDs, use the next available ID
            id = self.nextId++;
        }
    }

    // Release an ID, adding it to the free list
    function release(Ids storage self, uint id) internal {
        uint fdid = self.freeList[0];
        if (fdid > 0) {
            self.freeList[id] = fdid;
        }
        self.freeList[0] = id;
    }
}

// SPDX-License-Identifier: MIT OR Apache-2

pragma solidity ^0.8.24;

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

import "./interface/IPNS.sol";
import "./interface/IInfra.sol";
import "./libraries/IdProvider.sol";

contract Infra is ERC721Enumerable, Ownable, IInfra {
    using IdProvider for IdProvider.Ids;

    uint8 constant UPDATE_TYPE = 1;
    uint8 constant UPDATE_DOMAIN = 2;
    uint8 constant UPDATE_NAME = 4;

    // The name service
    IPNS public self_ipns;

    // An ID provider which reuses IDs when possible
    IdProvider.Ids private self_ids;

    // For displaying imagines on the NFTs
    string private self_baseURI;

    // All units
    mapping(uint => Unit) self_unitById;

    mapping(address => bool) self_trusted;

    //--//

    constructor(address pnsAddress) ERC721("PKTInfra", "PKTI") Ownable(msg.sender) {
        self_ipns = IPNS(pnsAddress);
        self_ids.init();
    }

    // Update

    function registerUnit(
        UnitType t,
        uint64 parentDomain,
        string calldata name,
        address to
    ) external override returns (uint) {
        {
            address es = _effectiveSender(to);
            _checkDomainAuthorized(parentDomain, es);
        }
        require(t > UnitType.Invalid && t < UnitType.InvalidTooHigh, "Invalid type");
        uint newTokenId = self_ids.take();
        Unit storage unit = self_unitById[newTokenId];
        unit.unitType = t;
        unit.parentDomain = parentDomain;
        unit.name = name;
        _safeMint(to, newTokenId);
        emit RegisterUnit(msg.sender, newTokenId, msg.sender, to, t, parentDomain, name);
        return newTokenId;
    }

    function updateUnit(
        uint id,
        uint8 update,
        UnitType t,
        uint64 parentDomain,
        string calldata name,
        address onBehalfOf
    ) external override {
        onBehalfOf = _effectiveSender(onBehalfOf);
        _checkAuthorized(id, onBehalfOf);
        Unit storage unit = self_unitById[id];
        if ((update & UPDATE_TYPE) > 0) {
            require(t > UnitType.Invalid && t < UnitType.InvalidTooHigh, "Invalid type");
            unit.unitType = t;
        }
        if ((update & UPDATE_DOMAIN) > 0) {
            _checkDomainAuthorized(parentDomain, onBehalfOf);
            unit.parentDomain = parentDomain;
        }
        if ((update & UPDATE_NAME) > 0) {
            unit.name = name;
        }
        emit UpdateUnit(msg.sender, id, update, t, parentDomain, name);
    }

    function deleteUnit(uint id, address onBehalfOf) external override {
        onBehalfOf = _effectiveSender(onBehalfOf);
        _checkAuthorized(id, onBehalfOf);
        delete self_unitById[id];
        _burn(id);
        self_ids.release(id);
        emit DeleteUnit(msg.sender, id);
    }

    function domainEviction(uint id) external override {
        Unit storage unit = self_unitById[id];
        uint64 parentDomain = unit.parentDomain;
        _checkDomainAuthorized(parentDomain, msg.sender);
        unit.parentDomain = 0;
        emit DomainEvict(msg.sender, id);
    }

    // View

    function getUnit(uint id) external override view returns (
        UnitType t,
        uint64 parentDomain,
        string memory name,
        address owner
    ) {
        owner = _ownerOf(id);
        Unit storage unit = self_unitById[id];
        t = unit.unitType;
        parentDomain = unit.parentDomain;
        name = unit.name;
    }

    function getUnits(
        uint[] calldata ids
    ) external override view returns (
        Unit[] memory out,
        address[] memory owners
    ) {
        out = new Unit[](ids.length);
        owners = new address[](ids.length);
        for (uint i = 0; i < ids.length; i++) {
            out[i] = self_unitById[ids[i]];
            owners[i] = _ownerOf(ids[i]);
        }
    }

    function isTrustedContract(address c) external override view returns (bool trusted) {
        return self_trusted[c];
    }

    function nextId() external override view returns (uint) {
        return self_ids.nextId;
    }

    function idFreeList(uint64 last) external override view returns (uint) {
        return self_ids.freeList[last];
    }

    // Admin

    function trustContract(address c, bool trusted) external override onlyOwner {
        if (trusted) {
            self_trusted[c] = true;
        } else {
            delete self_trusted[c];
        }
    }

    function setUriPrefix(string calldata pfx) external override onlyOwner {
        self_baseURI = pfx;
    }

    function setPns(address pns) external override onlyOwner {
        self_ipns = IPNS(pns);
    }

    // Internal

    function _baseURI() internal view override returns (string memory) {
        return self_baseURI;
    }

    function _effectiveSender(address to) private view returns (address) {
        if (self_trusted[msg.sender]) {
            return to;
        }
        return msg.sender;
    }

    function _checkDomainAuthorized(uint64 parentDomain, address addr) private view {
        if (parentDomain > 0) {
            require(self_ipns.authorizedFor(parentDomain, addr), "Not the owner of parentDomain");
        }
    }

    function _checkAuthorized(uint id, address who) private view {
        address owner = _ownerOf(id);
        require(owner != address(0), "Unit not registered");
        require(_isAuthorized(owner, who, id), "Not authorized to update unit");
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

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

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is set to the address provided by the deployer. This can
 * later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

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

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

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

pragma solidity ^0.8.20;

/**
 * @dev Standard signed math utilities missing in the Solidity language.
 */
library SignedMath {
    /**
     * @dev Returns the largest of two signed numbers.
     */
    function max(int256 a, int256 b) internal pure returns (int256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two signed numbers.
     */
    function min(int256 a, int256 b) internal pure returns (int256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two signed numbers without overflow.
     * The result is rounded towards zero.
     */
    function average(int256 a, int256 b) internal pure returns (int256) {
        // Formula from the book "Hacker's Delight"
        int256 x = (a & b) + ((a ^ b) >> 1);
        return x + (int256(uint256(x) >> 255) & (a ^ b));
    }

    /**
     * @dev Returns the absolute unsigned value of a signed value.
     */
    function abs(int256 n) internal pure returns (uint256) {
        unchecked {
            // must be unchecked in order to support `n = type(int256).min`
            return uint256(n >= 0 ? n : -n);
        }
    }
}

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

pragma solidity ^0.8.20;

import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant HEX_DIGITS = "0123456789abcdef";
    uint8 private constant ADDRESS_LENGTH = 20;

    /**
     * @dev The `value` string doesn't fit in the specified `length`.
     */
    error StringsInsufficientHexLength(uint256 value, uint256 length);

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `int256` to its ASCII `string` decimal representation.
     */
    function toStringSigned(int256 value) internal pure returns (string memory) {
        return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        uint256 localValue = value;
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = HEX_DIGITS[localValue & 0xf];
            localValue >>= 4;
        }
        if (localValue != 0) {
            revert StringsInsufficientHexLength(value, length);
        }
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
     * representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
    }

    /**
     * @dev Returns true if the two strings are equal.
     */
    function equal(string memory a, string memory b) internal pure returns (bool) {
        return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/draft-IERC6093.sol)
pragma solidity ^0.8.20;

/**
 * @dev Standard ERC20 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC20 tokens.
 */
interface IERC20Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC20InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC20InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `spender`’s `allowance`. Used in transfers.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     * @param allowance Amount of tokens a `spender` is allowed to operate with.
     * @param needed Minimum amount required to perform a transfer.
     */
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC20InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `spender` to be approved. Used in approvals.
     * @param spender Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC20InvalidSpender(address spender);
}

/**
 * @dev Standard ERC721 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC721 tokens.
 */
interface IERC721Errors {
    /**
     * @dev Indicates that an address can't be an owner. For example, `address(0)` is a forbidden owner in EIP-20.
     * Used in balance queries.
     * @param owner Address of the current owner of a token.
     */
    error ERC721InvalidOwner(address owner);

    /**
     * @dev Indicates a `tokenId` whose `owner` is the zero address.
     * @param tokenId Identifier number of a token.
     */
    error ERC721NonexistentToken(uint256 tokenId);

    /**
     * @dev Indicates an error related to the ownership over a particular token. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param tokenId Identifier number of a token.
     * @param owner Address of the current owner of a token.
     */
    error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC721InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC721InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param tokenId Identifier number of a token.
     */
    error ERC721InsufficientApproval(address operator, uint256 tokenId);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC721InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC721InvalidOperator(address operator);
}

/**
 * @dev Standard ERC1155 Errors
 * Interface of the https://eips.ethereum.org/EIPS/eip-6093[ERC-6093] custom errors for ERC1155 tokens.
 */
interface IERC1155Errors {
    /**
     * @dev Indicates an error related to the current `balance` of a `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     * @param balance Current balance for the interacting account.
     * @param needed Minimum amount required to perform a transfer.
     * @param tokenId Identifier number of a token.
     */
    error ERC1155InsufficientBalance(address sender, uint256 balance, uint256 needed, uint256 tokenId);

    /**
     * @dev Indicates a failure with the token `sender`. Used in transfers.
     * @param sender Address whose tokens are being transferred.
     */
    error ERC1155InvalidSender(address sender);

    /**
     * @dev Indicates a failure with the token `receiver`. Used in transfers.
     * @param receiver Address to which tokens are being transferred.
     */
    error ERC1155InvalidReceiver(address receiver);

    /**
     * @dev Indicates a failure with the `operator`’s approval. Used in transfers.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     * @param owner Address of the current owner of a token.
     */
    error ERC1155MissingApprovalForAll(address operator, address owner);

    /**
     * @dev Indicates a failure with the `approver` of a token to be approved. Used in approvals.
     * @param approver Address initiating an approval operation.
     */
    error ERC1155InvalidApprover(address approver);

    /**
     * @dev Indicates a failure with the `operator` to be approved. Used in approvals.
     * @param operator Address that may be allowed to operate on tokens without being their owner.
     */
    error ERC1155InvalidOperator(address operator);

    /**
     * @dev Indicates an array length mismatch between ids and values in a safeBatchTransferFrom operation.
     * Used in batch transfers.
     * @param idsLength Length of the array of token identifiers
     * @param valuesLength Length of the array of token amounts
     */
    error ERC1155InvalidArrayLength(uint256 idsLength, uint256 valuesLength);
}

{
  "compilationTarget": {
    "contracts/Infra.sol": "Infra"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "remappings": []
}