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// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

import {ERC721, ERC721Enumerable} from "ERC721Enumerable.sol";

import {IChainNft, IChainRegistry} from "IChainNft.sol";

contract ChainNft is
    ERC721Enumerable,
    IChainNft
{
    string public constant NAME = "Dezentralized Insurance Protocol Registry";
    string public constant SYMBOL = "DIPR";

    // remember registry
    IChainRegistry private _registry;

    // remember token uri
    mapping(uint256 tokenId => string uri) private _uri;

    // only used for _getNextTokenId
    uint256 internal _chainIdInt; 
    uint256 internal _chainIdDigits;
    uint256 internal _chainIdMultiplier;
    uint256 internal _idNext;
    uint256 internal _totalMinted;


    modifier onlyRegistry() {
        require(msg.sender == address(_registry), "ERROR:CRG-001:CALLER_NOT_REGISTRY");
        _;
    }


    constructor(address registry)
        ERC721(NAME, SYMBOL)
    {
        require(registry != address(0), "ERROR:CRG-010:REGISTRY_ZERO");

        _registry = IChainRegistry(registry);

        _chainIdInt = block.chainid;
        _chainIdDigits = _countDigits(_chainIdInt);
        _chainIdMultiplier = 10 ** _chainIdDigits;

        // on mainnet/goerli start /1 (reserved for protocol nft) on other chains with 2
        if(block.chainid == 1 || block.chainid == 5) {
            _idNext = 1;
        } else {
            _idNext = 2;
        }
    }


    function mint(
        address to,
        string memory uri
    )
        external
        override
        onlyRegistry
        returns(uint256 tokenId)
    {
        tokenId = _getNextTokenId();
        _totalMinted++;

        _safeMint(to, tokenId);

        if(bytes(uri).length > 0) {
            _uri[tokenId] = uri;
        }
    }


    function burn(uint256 tokenId)
        external
        override
        onlyRegistry
    {
        _requireMinted(tokenId);
        _burn(tokenId);
        delete _uri[tokenId];
    }


    function setURI(uint256 tokenId, string memory uri)
        external
        override
        onlyRegistry
    {
        require(bytes(uri).length > 0, "ERROR:CRG-011:URI_EMPTY");

        _requireMinted(tokenId);
        _uri[tokenId] = uri;
    }


    function exists(uint256 tokenId)
        external
        view
        override
        returns(bool)
    {
        return _exists(tokenId);
    }


    function tokenURI(uint256 tokenId)
        public
        view
        override 
        returns(string memory)
    {
        _requireMinted(tokenId);
        return _uri[tokenId];
    }


    function getRegistry()
        external
        view
        override
        returns(IChainRegistry registry)
    {
        return _registry;
    }

    function totalMinted() external override view returns(uint256) {
        return _totalMinted;
    }

    function implementsIChainNft() external pure override returns(bool) {
        return true;
    }


    // requirement: each chain registry produces token ids that
    // are guaranteed to not collide with any token id genereated
    // on a different chain
    //
    // format concat(counter,chainid,2 digits for len-of-chain-id)
    // restriction chainid up to 99 digits
    // decode: from right to left:
    // - 2 right most digits encode length of chainid
    // - move number of digits to left as determined above (-> chainid)
    // - the reminder to the left is the counter
    // examples
    // 1101
    // ^^ ^
    // || +- 1-digit chain id
    // |+-- chain id = 1 (mainnet)
    // +-- 1st token id on mainnet
    // (1 * 10 ** 1 + 1) * 100 + 1
    // 42987654321010
    // ^ ^          ^
    // | |          +- 10-digit chain id
    // | +-- chain id = 9876543210 (hypothetical chainid)
    // +-- 42nd token id on this chain
    // (42 * 10 ** 10 + 9876543210) * 100 + 10
    // (index * 10 ** digits + chainid) * 100 + digits (1 < digits < 100)

    function _getNextTokenId() private returns(uint256 id) {
        id = (_idNext * _chainIdMultiplier + _chainIdInt) * 100 + _chainIdDigits;
        _idNext++;
    }


    function _countDigits(uint256 num)
        private 
        pure 
        returns (uint256 count)
    {
        count = 0;
        while (num != 0) {
            count++;
            num /= 10;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/extensions/ERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "ERC721.sol";
import "IERC721Enumerable.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.
 */
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
    // Mapping from owner to list of owned token IDs
    mapping(address => mapping(uint256 => uint256)) private _ownedTokens;

    // Mapping from token ID to index of the owner tokens list
    mapping(uint256 => uint256) private _ownedTokensIndex;

    // Array with all token ids, used for enumeration
    uint256[] private _allTokens;

    // Mapping from token id to position in the allTokens array
    mapping(uint256 => uint256) private _allTokensIndex;

    /**
     * @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 override returns (uint256) {
        require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
        return _ownedTokens[owner][index];
    }

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

    /**
     * @dev See {IERC721Enumerable-tokenByIndex}.
     */
    function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
        require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
        return _allTokens[index];
    }

    /**
     * @dev See {ERC721-_beforeTokenTransfer}.
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 firstTokenId,
        uint256 batchSize
    ) internal virtual override {
        super._beforeTokenTransfer(from, to, firstTokenId, batchSize);

        if (batchSize > 1) {
            // Will only trigger during construction. Batch transferring (minting) is not available afterwards.
            revert("ERC721Enumerable: consecutive transfers not supported");
        }

        uint256 tokenId = firstTokenId;

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

    /**
     * @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 = ERC721.balanceOf(to);
        _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 = ERC721.balanceOf(from) - 1;
        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();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.2) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "IERC721.sol";
import "IERC721Receiver.sol";
import "IERC721Metadata.sol";
import "Address.sol";
import "Context.sol";
import "Strings.sol";
import "ERC165.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}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => 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 override returns (uint256) {
        require(owner != address(0), "ERC721: address zero is not a valid owner");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _ownerOf(tokenId);
        require(owner != address(0), "ERC721: invalid token ID");
        return owner;
    }

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

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

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

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(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 override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not token owner or approved for all"
        );

        _approve(to, tokenId);
    }

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

        return _tokenApprovals[tokenId];
    }

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

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

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");

        _transfer(from, to, tokenId);
    }

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

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
        _safeTransfer(from, to, tokenId, data);
    }

    /**
     * @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.
     *
     * `data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - 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,
        bytes memory data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
     */
    function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
        return _owners[tokenId];
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _ownerOf(tokenId) != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * 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 virtual {
        _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);
        require(
            _checkOnERC721Received(address(0), to, tokenId, data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @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 virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId, 1);

        // Check that tokenId was not minted by `_beforeTokenTransfer` hook
        require(!_exists(tokenId), "ERC721: token already minted");

        unchecked {
            // Will not overflow unless all 2**256 token ids are minted to the same owner.
            // Given that tokens are minted one by one, it is impossible in practice that
            // this ever happens. Might change if we allow batch minting.
            // The ERC fails to describe this case.
            _balances[to] += 1;
        }

        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(address(0), to, tokenId, 1);
    }

    /**
     * @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 virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId, 1);

        // Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
        owner = ERC721.ownerOf(tokenId);

        // Clear approvals
        delete _tokenApprovals[tokenId];

        unchecked {
            // Cannot overflow, as that would require more tokens to be burned/transferred
            // out than the owner initially received through minting and transferring in.
            _balances[owner] -= 1;
        }
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);

        _afterTokenTransfer(owner, address(0), tokenId, 1);
    }

    /**
     * @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 virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId, 1);

        // Check that tokenId was not transferred by `_beforeTokenTransfer` hook
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");

        // Clear approvals from the previous owner
        delete _tokenApprovals[tokenId];

        unchecked {
            // `_balances[from]` cannot overflow for the same reason as described in `_burn`:
            // `from`'s balance is the number of token held, which is at least one before the current
            // transfer.
            // `_balances[to]` could overflow in the conditions described in `_mint`. That would require
            // all 2**256 token ids to be minted, which in practice is impossible.
            _balances[from] -= 1;
            _balances[to] += 1;
        }
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId, 1);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits an {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits an {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Reverts if the `tokenId` has not been minted yet.
     */
    function _requireMinted(uint256 tokenId) internal view virtual {
        require(_exists(tokenId), "ERC721: invalid token ID");
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * 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
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    /// @solidity memory-safe-assembly
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
     * - When `from` is zero, the tokens will be minted for `to`.
     * - When `to` is zero, ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 firstTokenId,
        uint256 batchSize
    ) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
     * used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
     * - When `from` is zero, the tokens were minted for `to`.
     * - When `to` is zero, ``from``'s tokens were burned.
     * - `from` and `to` are never both zero.
     * - `batchSize` is non-zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 firstTokenId,
        uint256 batchSize
    ) internal virtual {}

    /**
     * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
     *
     * WARNING: Anyone calling this MUST ensure that the balances remain consistent with the ownership. The invariant
     * being 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`.
     */
    // solhint-disable-next-line func-name-mixedcase
    function __unsafe_increaseBalance(address account, uint256 amount) internal {
        _balances[account] += amount;
    }
}

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

pragma solidity ^0.8.0;

import "IERC165.sol";

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "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 v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

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

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

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

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

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

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

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

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

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

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

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

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

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

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

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

pragma solidity ^0.8.0;

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "Math.sol";

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

    /**
     * @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), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @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) {
        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] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        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);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @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 up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (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; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 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.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            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 (rounding == Rounding.Up && 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 down.
     *
     * 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 + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * 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 + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * 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 + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * 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 10, 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 + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "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);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)

pragma solidity ^0.8.0;

import "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: Apache-2.0
pragma solidity ^0.8.19;

import {IERC721Enumerable} from "IERC721Enumerable.sol";

import {IChainRegistry} from "IChainRegistry.sol";

type NftId is uint96;

using {
    eqNftId as ==,
    neNftId as !=
}
    for NftId global;

function eqNftId(NftId a, NftId b) pure returns(bool isSame) { return NftId.unwrap(a) == NftId.unwrap(b); }
function neNftId(NftId a, NftId b) pure returns(bool isDifferent) { return NftId.unwrap(a) != NftId.unwrap(b); }
function gtz(NftId a) pure returns(bool) { return NftId.unwrap(a) > 0; }
function zeroNftId() pure returns(NftId) { return NftId.wrap(0); }

function toNftId(uint256 tokenId) pure returns(NftId) { return NftId.wrap(uint96(tokenId)); }

interface IChainNft is 
    IERC721Enumerable 
{

    function mint(address to, string memory uri) external returns(uint256 tokenId);
    function burn(uint256 tokenId) external;
    function setURI(uint256 tokenId, string memory uri) external;

    function getRegistry() external view returns(IChainRegistry registry);
    function exists(uint256 tokenId) external view returns(bool);
    function totalMinted() external view returns(uint256);

    function implementsIChainNft() external pure returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

import {IBaseTypes, ChainId, Blocknumber} from "IBaseTypes.sol";
import {Version} from "IVersionType.sol";
import {IVersionable} from "IVersionable.sol";

import {IStaking} from "IStaking.sol";

import {IChainNft, NftId} from "IChainNft.sol";
import {IInstanceServiceFacade} from "IInstanceServiceFacade.sol";

type ObjectType is uint8;

using {
    eqObjectType as ==,
    neObjectType as !=
}
    for ObjectType global;

function eqObjectType(ObjectType a, ObjectType b) pure returns(bool isSame) { return ObjectType.unwrap(a) == ObjectType.unwrap(b); }
function neObjectType(ObjectType a, ObjectType b) pure returns(bool isDifferent) { return ObjectType.unwrap(a) != ObjectType.unwrap(b); }


interface IChainRegistry is 
    IBaseTypes,
    IVersionable
{

    enum ObjectState {
        Undefined,
        Proposed,
        Approved,
        Suspended,
        Archived,
        Burned
    }


    struct NftInfo {
        NftId id;
        ChainId chain;
        ObjectType objectType;
        ObjectState state;
        string uri;
        bytes data;
        Blocknumber mintedIn;
        Blocknumber updatedIn;
        Version version;
    }


    event LogChainRegistryObjectRegistered(NftId id, ChainId chain, ObjectType objectType, ObjectState state, address to);
    event LogChainRegistryObjectStateSet(NftId id, ObjectState stateNew, ObjectState stateOld, address setBy);

    //--- state changing functions ------------------//

    function registerChain(ChainId chain, string memory uri) external returns(NftId id);
    function registerRegistry(ChainId chain, address registry, string memory uri) external returns(NftId id);
    function registerToken(ChainId chain,address token, string memory uri) external returns(NftId id);       


    function registerStake(
        NftId target, 
        address staker
    )
        external
        returns(NftId id);


    function registerInstance(
        address instanceRegistry,
        string memory displayName,
        string memory uri
    )
        external
        returns(NftId id);


    function registerComponent(
        bytes32 instanceId,
        uint256 componentId,
        string memory uri
    )
        external
        returns(NftId id);


    function registerBundle(
        bytes32 instanceId,
        uint256 riskpoolId,
        uint256 bundleId,
        string memory displayName,
        uint256 expiryAt
    )
        external
        returns(NftId id);


    function setObjectState(NftId id, ObjectState state) external;


    //--- view and pure functions ------------------//

    function getNft() external view returns(IChainNft);
    function getStaking() external view returns(IStaking);

    function exists(NftId id) external view returns(bool);

    // generic accessors
    function objects(ChainId chain, ObjectType t) external view returns(uint256 numberOfObjects);
    function getNftId(ChainId chain, ObjectType t, uint256 idx) external view returns(NftId id);
    function getNftInfo(NftId id) external view returns(NftInfo memory);
    function ownerOf(NftId id) external view returns(address nftOwner);

    // chain specific accessors
    function chains() external view returns(uint256 numberOfChains);
    function getChainId(uint256 idx) external view returns(ChainId chain);
    function getChainNftId(ChainId chain) external view returns(NftId id);

    // type specific accessors
    function getRegistryNftId(ChainId chain) external view returns(NftId id);
    function getTokenNftId(ChainId chain, address token) external view returns(NftId id);
    function getInstanceNftId(bytes32 instanceId) external view returns(NftId id);
    function getComponentNftId(bytes32 instanceId, uint256 componentId) external view returns(NftId id);
    function getBundleNftId(bytes32 instanceId, uint256 componentId) external view returns(NftId id);


    function decodeRegistryData(NftId id)
        external
        view
        returns(address registry);


    function decodeTokenData(NftId id)
        external
        view
        returns(address token);


    function decodeInstanceData(NftId id)
        external
        view
        returns(
            bytes32 instanceId,
            address registry,
            string memory displayName);


    function decodeComponentData(NftId id)
        external
        view
        returns(
            bytes32 instanceId,
            uint256 componentId,
            address token);


    function decodeBundleData(NftId id)
        external
        view
        returns(
            bytes32 instanceId,
            uint256 riskpoolId,
            uint256 bundleId,
            address token,
            string memory displayName,
            uint256 expiryAt);


    function decodeStakeData(NftId id)
        external
        view
        returns(
            NftId target,
            ObjectType targetType);


    function toChain(uint256 chainId) 
        external
        pure
        returns(ChainId);

    // only same chain: utility to get reference to instance service for specified instance id
    function getInstanceServiceFacade(bytes32 instanceId) 
        external
        view
        returns(IInstanceServiceFacade instanceService);

    // only same chain:  utilitiv function to probe an instance given its registry address
    function probeInstance(address registry)
        external 
        view 
        returns(
            bool isContract, 
            uint256 contractSize, 
            ChainId chain,
            bytes32 istanceId, 
            bool isValidId, 
            IInstanceServiceFacade instanceService);

    function implementsIChainRegistry() external pure returns(bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

// restriction: uint<n> n needs to be different for each type to support function overloading

// allows for chain ids up to 13 digits
type ChainId is bytes5;

using {
    eqChainId as ==,
    neqChainId as !=
}
    for ChainId global;

function eqChainId(ChainId a, ChainId b) pure returns(bool isSame) { return ChainId.unwrap(a) == ChainId.unwrap(b); }
function neqChainId(ChainId a, ChainId b) pure returns(bool isDifferent) { return ChainId.unwrap(a) != ChainId.unwrap(b); }

function toChainId(uint256 chainId) pure returns(ChainId) { return ChainId.wrap(bytes5(uint40(chainId)));}
function thisChainId() view returns(ChainId) { return toChainId(block.chainid); }

type Timestamp is uint40;

using {
    gtTimestamp as >,
    gteTimestamp as >=,
    ltTimestamp as <,
    lteTimestamp as <=,
    eqTimestamp as ==,
    neqTimestamp as !=
}
    for Timestamp global;

function gtTimestamp(Timestamp a, Timestamp b) pure returns(bool) { return Timestamp.unwrap(a) > Timestamp.unwrap(b); }
function gteTimestamp(Timestamp a, Timestamp b) pure returns(bool) { return Timestamp.unwrap(a) >= Timestamp.unwrap(b); }

function ltTimestamp(Timestamp a, Timestamp b) pure returns(bool) { return Timestamp.unwrap(a) < Timestamp.unwrap(b); }
function lteTimestamp(Timestamp a, Timestamp b) pure returns(bool) { return Timestamp.unwrap(a) <= Timestamp.unwrap(b); }

function eqTimestamp(Timestamp a, Timestamp b) pure returns(bool) { return Timestamp.unwrap(a) == Timestamp.unwrap(b); }
function neqTimestamp(Timestamp a, Timestamp b) pure returns(bool) { return Timestamp.unwrap(a) != Timestamp.unwrap(b); }

function toTimestamp(uint256 timestamp) pure returns(Timestamp) { return Timestamp.wrap(uint40(timestamp));}

// solhint-disable-next-line not-rely-on-time
function blockTimestamp() view returns(Timestamp) { return toTimestamp(block.timestamp); }

function zeroTimestamp() pure returns(Timestamp) { return toTimestamp(0); }

type Blocknumber is uint32;


interface IBaseTypes {

    function intToBytes(uint256 x, uint8 shift) external pure returns(bytes memory);

    function toInt(Blocknumber x) external pure returns(uint);
    function toInt(Timestamp x) external pure returns(uint);
    function toInt(ChainId x) external pure returns(uint);

    function blockNumber() external view returns(Blocknumber);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

// restriction: uint<n> n needs to be different for each type to support function overloading
type VersionPart is uint16;
type Version is uint48; // to concatenate major,minor,patch version parts

using {
    gtVersion as >,
    gteVersion as >=,
    eqVersion as ==
}
    for Version global;

function gtVersion(Version a, Version b) pure returns(bool isGreaterThan) { return Version.unwrap(a) > Version.unwrap(b); }
function gteVersion(Version a, Version b) pure returns(bool isGreaterOrSame) { return Version.unwrap(a) >= Version.unwrap(b); }
function eqVersion(Version a, Version b) pure returns(bool isSame) { return Version.unwrap(a) == Version.unwrap(b); }

function versionPartToInt(VersionPart x) pure returns(uint) { return VersionPart.unwrap(x); }
function versionToInt(Version x) pure returns(uint) { return Version.unwrap(x); }

function toVersionPart(uint16 versionPart) pure returns(VersionPart) { return VersionPart.wrap(versionPart); }

function toVersion(
    VersionPart major,
    VersionPart minor,
    VersionPart patch
)
    pure
    returns(Version)
{
    uint majorInt = versionPartToInt(major);
    uint minorInt = versionPartToInt(minor);
    uint patchInt = versionPartToInt(patch);

    return Version.wrap(
        uint48(
            (majorInt << 32) + (minorInt << 16) + patchInt));
}


function zeroVersion() pure returns(Version) {
    return toVersion(toVersionPart(0), toVersionPart(0), toVersionPart(0));
}


function toVersionParts(Version _version)
    pure
    returns(
        VersionPart major,
        VersionPart minor,
        VersionPart patch
    )
{
    uint versionInt = versionToInt(_version);
    uint16 majorInt = uint16(versionInt >> 32);

    versionInt -= majorInt << 32;
    uint16 minorInt = uint16(versionInt >> 16);
    uint16 patchInt = uint16(versionInt - (minorInt << 16));

    return (
        toVersionPart(majorInt),
        toVersionPart(minorInt),
        toVersionPart(patchInt)
    );
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

import {Blocknumber, Timestamp} from "IBaseTypes.sol";
import {Version, VersionPart} from "IVersionType.sol";

interface IVersionable {

    struct VersionInfo {
        Version version;
        address implementation;
        address activatedBy;
        Blocknumber activatedIn;
        Timestamp activatedAt;
    }

    event LogVersionableActivated(Version version, address implementation, address activatedBy);

    /**
     * @dev IMPORTANT this function needs to be implemented by each new version
     * any such activate implementation needs to call internal function call _activate() 
     * any new version needs to inherit from previous version
     */
    function activate(address implementation, address activatedBy) external;
    function isActivated(Version _version) external view returns(bool);

    // returns current version (ideally immutable)
    function version() external pure returns(Version);
    function versionParts()
        external
        pure
        returns(
            VersionPart major,
            VersionPart minor,
            VersionPart patch
        );

    function versions() external view returns(uint256);
    function getVersion(uint256 idx) external view returns(Version);
    function getVersionInfo(Version _version) external view returns(VersionInfo memory);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

import {IERC20Metadata} from "IERC20Metadata.sol";

import {ChainId, Timestamp} from "IBaseTypes.sol";
import {Version} from "IVersionType.sol";
import {IVersionable} from "IVersionable.sol";

import {UFixed} from "UFixedMath.sol";

import {NftId} from "IChainNft.sol";
import {IChainRegistry, ObjectType} from "IChainRegistry.sol";
import {IInstanceServiceFacade} from "IInstanceServiceFacade.sol";


interface IStaking is
    IVersionable
{

    struct StakeInfo {
        NftId id;
        NftId target;
        uint256 stakeBalance;
        uint256 rewardBalance;
        Timestamp createdAt;
        Timestamp updatedAt;
        Version version;
    }

    event LogStakingWalletChanged(address user, address oldWallet, address newWallet);
    event LogStakingRewardReservesIncreased(address user, uint256 amount, uint256 newBalance);
    event LogStakingRewardReservesDecreased(address user, uint256 amount, uint256 newBalance);

    event LogStakingRewardRateSet(address user, UFixed oldRewardRate, UFixed newRewardRate);
    event LogStakingStakingRateSet(address user, ChainId chain, address token, UFixed oldStakingRate, UFixed newStakingRate);

    event LogStakingNewStakeCreated(NftId target, address user, NftId id);
    event LogStakingStaked(NftId target, address user, NftId id, uint256 amount, uint256 newBalance);
    event LogStakingUnstaked(NftId target, address user, NftId id, uint256 amount, uint256 newBalance);

    event LogStakingRewardsUpdated(NftId id, uint256 amount, uint256 newBalance);
    event LogStakingRewardsClaimed(NftId id, uint256 amount, uint256 newBalance);

    //--- state changing functions ------------------//

    function setStakingWallet(address stakingWalletNew) external;

    function refillRewardReserves(uint256 dipAmount) external;
    function withdrawRewardReserves(uint256 dipAmount) external;

    function setRewardRate(UFixed rewardRate) external;
    function setStakingRate(ChainId chain, address token, UFixed stakingRate) external;    

    function createStake(NftId target, uint256 dipAmount) external returns(NftId id);
    function stake(NftId id, uint256 dipAmount) external;
    function unstake(NftId id, uint256 dipAmount) external;  
    function unstakeAndClaimRewards(NftId id) external;
    function claimRewards(NftId id) external;

    //--- view and pure functions ------------------//

    function getRegistry() external view returns(IChainRegistry);

    function maxRewardRate() external view returns(UFixed rate);
    function rewardRate() external view returns(UFixed rate);
    function rewardBalance() external view returns(uint256 dipAmount);
    function rewardReserves() external view returns(uint256 dipAmount);

    function stakeBalance() external view returns(uint256 dipAmount);
    function stakingRate(ChainId chain, address token) external view returns(UFixed stakingRate);
    function getStakingWallet() external view returns(address stakingWallet);
    function getDip() external view returns(IERC20Metadata);

    function isStakeOwner(NftId id, address user) external view returns(bool isOwner);
    function getInfo(NftId id) external view returns(StakeInfo memory info);

    function stakes(NftId target) external view returns(uint256 dipAmount);
    function capitalSupport(NftId target) external view returns(uint256 capitalAmount);

    function isStakingSupportedForType(ObjectType targetType) external view returns(bool isSupported);
    function isStakingSupported(NftId target) external view returns(bool isSupported);
    function isUnstakingSupported(NftId target) external view returns(bool isSupported);

    function calculateRewardsIncrement(StakeInfo memory stakeInfo) external view returns(uint256 rewardsAmount);
    function calculateRewards(uint256 amount, uint256 duration) external view returns(uint256 rewardAmount);

    function calculateRequiredStaking(ChainId chain, address token, uint256 tokenAmount) external view returns(uint256 dipAmount);
    function calculateCapitalSupport(ChainId chain, address token, uint256 dipAmount) external view returns(uint256 tokenAmount);

    function toChain(uint256 chainId) external pure returns(ChainId);

    function toRate(uint256 value, int8 exp) external pure returns(UFixed);
    function rateDecimals() external pure returns(uint256 decimals);

    //--- view and pure functions (target type specific) ------------------//

    function getBundleInfo(NftId bundle)
        external
        view
        returns(
            bytes32 instanceId,
            uint256 riskpoolId,
            uint256 bundleId,
            address token,
            string memory displayName,
            IInstanceServiceFacade.BundleState bundleState,
            Timestamp expiryAt,
            bool stakingSupported,
            bool unstakingSupported,
            uint256 stakeBalance
        );

    function implementsIStaking() external pure returns(bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "IERC20.sol";

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

import {Math} from "Math.sol";

type UFixed is uint256;

using {
    addUFixed as +,
    subUFixed as -,
    mulUFixed as *,
    divUFixed as /,
    gtUFixed as >,
    gteUFixed as >=,
    ltUFixed as <,
    lteUFixed as <=,
    eqUFixed as ==
}
    for UFixed global;

function addUFixed(UFixed a, UFixed b) pure returns(UFixed) {
    return UFixed.wrap(UFixed.unwrap(a) + UFixed.unwrap(b));
}

function subUFixed(UFixed a, UFixed b) pure returns(UFixed) {
    require(a >= b, "ERROR:UFM-010:NEGATIVE_RESULT");

    return UFixed.wrap(UFixed.unwrap(a) - UFixed.unwrap(b));
}

function mulUFixed(UFixed a, UFixed b) pure returns(UFixed) {
    return UFixed.wrap(Math.mulDiv(UFixed.unwrap(a), UFixed.unwrap(b), 10 ** 18));
}

function divUFixed(UFixed a, UFixed b) pure returns(UFixed) {
    require(UFixed.unwrap(b) > 0, "ERROR:UFM-020:DIVISOR_ZERO");

    return UFixed.wrap(
        Math.mulDiv(
            UFixed.unwrap(a), 
            10 ** 18,
            UFixed.unwrap(b)));
}

function gtUFixed(UFixed a, UFixed b) pure returns(bool isGreaterThan) {
    return UFixed.unwrap(a) > UFixed.unwrap(b);
}

function gteUFixed(UFixed a, UFixed b) pure returns(bool isGreaterThan) {
    return UFixed.unwrap(a) >= UFixed.unwrap(b);
}

function ltUFixed(UFixed a, UFixed b) pure returns(bool isGreaterThan) {
    return UFixed.unwrap(a) < UFixed.unwrap(b);
}

function lteUFixed(UFixed a, UFixed b) pure returns(bool isGreaterThan) {
    return UFixed.unwrap(a) <= UFixed.unwrap(b);
}

function eqUFixed(UFixed a, UFixed b) pure returns(bool isEqual) {
    return UFixed.unwrap(a) == UFixed.unwrap(b);
}

function gtz(UFixed a) pure returns(bool isZero) {
    return UFixed.unwrap(a) > 0;
}

function eqz(UFixed a) pure returns(bool isZero) {
    return UFixed.unwrap(a) == 0;
}

function delta(UFixed a, UFixed b) pure returns(UFixed) {
    if(a > b) {
        return a - b;
    }

    return b - a;
}

contract UFixedType {

    enum Rounding {
        Down, // floor(value)
        Up, // = ceil(value)
        HalfUp // = floor(value + 0.5)
    }

    int8 public constant EXP = 18;
    uint256 public constant MULTIPLIER = 10 ** uint256(int256(EXP));
    uint256 public constant MULTIPLIER_HALF = MULTIPLIER / 2;
    
    Rounding public constant ROUNDING_DEFAULT = Rounding.HalfUp;

    function decimals() public pure returns(uint256) {
        return uint8(EXP);
    }

    function itof(uint256 a)
        public
        pure
        returns(UFixed)
    {
        return UFixed.wrap(a * MULTIPLIER);
    }

    function itof(uint256 a, int8 exp)
        public
        pure
        returns(UFixed)
    {
        require(EXP + exp >= 0, "ERROR:FM-010:EXPONENT_TOO_SMALL");
        require(EXP + exp <= 2 * EXP, "ERROR:FM-011:EXPONENT_TOO_LARGE");

        return UFixed.wrap(a * 10 ** uint8(EXP + exp));
    }

    function ftoi(UFixed a)
        public
        pure
        returns(uint256)
    {
        return ftoi(a, ROUNDING_DEFAULT);
    }

    function ftoi(UFixed a, Rounding rounding)
        public
        pure
        returns(uint256)
    {
        if(rounding == Rounding.HalfUp) {
            return Math.mulDiv(UFixed.unwrap(a) + MULTIPLIER_HALF, 1, MULTIPLIER, Math.Rounding.Down);
        } else if(rounding == Rounding.Down) {
            return Math.mulDiv(UFixed.unwrap(a), 1, MULTIPLIER, Math.Rounding.Down);
        } else {
            return Math.mulDiv(UFixed.unwrap(a), 1, MULTIPLIER, Math.Rounding.Up);
        }
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.19;

import {IERC20Metadata} from "IERC20Metadata.sol";

// needs to be in sync with definition in IInstanceService

interface IComponent {

    function getId() external view returns(uint256);
}


interface IInstanceServiceFacade {

    // needs to be in sync with definition in IComponent
    enum ComponentType {
        Oracle,
        Product,
        Riskpool
    }

    // needs to be in sync with definition in IComponent
    enum ComponentState {
        Created,
        Proposed,
        Declined,
        Active,
        Paused,
        Suspended,
        Archived
    }

    // needs to be in sync with definition in IBundle
    enum BundleState {
        Active,
        Locked,
        Closed,
        Burned
    }

    // needs to be in sync with definition in IBundle
    struct Bundle {
        uint256 id;
        uint256 riskpoolId;
        uint256 tokenId;
        BundleState state;
        bytes filter; // required conditions for applications to be considered for collateralization by this bundle
        uint256 capital; // net investment capital amount (<= balance)
        uint256 lockedCapital; // capital amount linked to collateralizaion of non-closed policies (<= capital)
        uint256 balance; // total amount of funds: net investment capital + net premiums - payouts
        uint256 createdAt;
        uint256 updatedAt;
    }

    function getChainId() external view returns(uint256 chainId);
    function getInstanceId() external view returns(bytes32 instanceId);
    function getInstanceOperator() external view returns(address instanceOperator);

    function getComponent(uint256 componentId) external view returns(IComponent component);
    function getComponentType(uint256 componentId) external view returns(ComponentType componentType);
    function getComponentState(uint256 componentId) external view returns(ComponentState componentState);
    function getComponentToken(uint256 componentId) external view returns(IERC20Metadata token);

    function getBundle(uint256 bundleId) external view returns(Bundle memory bundle);
}

{
  "evmVersion": "istanbul",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "ChainNft.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

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IChainRegistry","name":"registry","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementsIChainNft","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"string","name":"uri","type":"string"}],"name":"mint","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"string","name":"uri","type":"string"}],"name":"setURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000afdf702b7161fdae8542f80b1851d311a3b23c5f

-----Decoded View---------------
Arg [0] : registry (address): 0xaFdf702B7161fDaE8542F80B1851d311A3b23C5f

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000afdf702b7161fdae8542f80b1851d311a3b23c5f