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// SPDX-License-Identifier: MIT

/// @title NFTSEA Tickets
/// @author Transient Labs

pragma solidity ^0.8.9;

import "ERC1155TLCore.sol";

contract NFTSEATickets is ERC1155TLCore {

    constructor (address _admin, address _payout) ERC1155TLCore(_admin, _payout, "NFTSEA Tickets by NFT Access & Transient Labs") {}

    function setMerkleRoot(uint256 _tokenId, bytes32 _merkleRoot) external adminOrOwner {
        require(tokenDetails[_tokenId].created, "Token ID not valid");
        tokenDetails[_tokenId].merkleRoot = _merkleRoot;
    }

    function setAvailableSupply(uint256 _tokenId, uint64 _supply) external adminOrOwner {
        require(tokenDetails[_tokenId].created, "Token ID not valid");
        tokenDetails[_tokenId].availableSupply = _supply;
    }
}

// SPDX-License-Identifier: MIT

/**
*   @title ERC-1155 TL Core
*   @notice ERC-1155 contract with owner/admin roles, merkle claim, airdrops, and owner mint functionality
*   @author Transient Labs
*/

/*
   ___                            __  __          ______                  _          __    __        __     
  / _ \___ _    _____ _______ ___/ / / /  __ __  /_  __/______ ____  ___ (_)__ ___  / /_  / /  ___ _/ /  ___
 / ___/ _ \ |/|/ / -_) __/ -_) _  / / _ \/ // /   / / / __/ _ `/ _ \(_-</ / -_) _ \/ __/ / /__/ _ `/ _ \(_-<
/_/   \___/__,__/\__/_/  \__/\_,_/ /_.__/\_, /   /_/ /_/  \_,_/_//_/___/_/\__/_//_/\__/ /____/\_,_/_.__/___/
                                        /___/                                                               
*/

pragma solidity ^0.8.9;

import "ERC1155.sol";
import "Ownable.sol";
import "MerkleProof.sol";
import "EIP2981MultiToken.sol";

contract ERC1155TLCore is ERC1155, EIP2981MultiToken, Ownable {

    struct TokenDetails {
        bool created;
        bool mintStatus;
        bool frozen;
        uint64 availableSupply;
        uint16 mintAllowance;
        uint256 price;
        string uri;
        bytes32 merkleRoot;
        mapping(address => uint16) numMinted;
    }

    mapping(uint256 => TokenDetails) internal tokenDetails;

    address public adminAddress;
    address payable public payoutAddress;

    string public name;

    modifier adminOrOwner {
        require(msg.sender == adminAddress || msg.sender == owner(), "ERC1155TLCore: Address not admin or owner");
        _;
    }

    modifier isEOA {
        require(msg.sender == tx.origin, "ERC1155TLCore: Function must be called by an EOA");
        _;
    }

    /**
    *   @param admin is the admin address
    *   @param payout is the payout address
    *   @param contractName is the name of the contract
    */
    constructor(address admin, address payout, string memory contractName) ERC1155("") EIP2981MultiToken() Ownable() {
        adminAddress = admin;
        payoutAddress = payable(payout);
        name = contractName;
    }

    /**
    *   @notice function to create a token
    *   @dev requires owner or admin
    *   @param tokenId must be a new token id
    *   @param supply is the total supply of the new token
    *   @param mintStatus is a bool representing initial mint status
    *   @param mintAllowance is a uint16 representing the number someone is able to mint
    *   @param price is a uint256 representing mint price in wei
    *   @param uri_ is the new token uri
    *   @param merkleRoot is the token merkle root
    *   @param royaltyRecipient is an address that is the royalty recipient for this token
    *   @param royaltyPerc is the percentage for royalties, in basis (out of 10,000)
    */
    function createToken(uint256 tokenId, uint64 supply, bool mintStatus, uint16 mintAllowance, uint256 price, string memory uri_, bytes32 merkleRoot, address royaltyRecipient, uint256 royaltyPerc) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created == false, "ERC1155TLCore: Token ID already exists");
        tokenDetails[tokenId].created = true;
        tokenDetails[tokenId].availableSupply = supply;
        tokenDetails[tokenId].mintAllowance = mintAllowance;
        tokenDetails[tokenId].mintStatus = mintStatus;
        tokenDetails[tokenId].price = price;
        tokenDetails[tokenId].uri = uri_;
        tokenDetails[tokenId].merkleRoot = merkleRoot;
        setRoyaltyInfo(tokenId, royaltyRecipient, royaltyPerc);
    }

    /**
    *   @notice function to set mint allowance for a token
    *   @dev requires admin or owner
    *   @param tokenId is the token id
    *   @param allowance is the new available mint allowance for that token
    */
    function setMintAllowance(uint256 tokenId, uint16 allowance) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        tokenDetails[tokenId].mintAllowance = allowance;
    }

    /**
    *   @notice freezes the metadata for the token
    *   @dev requires admin or owner
    *   @param tokenId is the token id
    */
    function freezeToken(uint256 tokenId) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        tokenDetails[tokenId].frozen = true;
    }

    /**
    *   @notice sets the URI for individual tokens
    *   @dev requires admin or owner
    *   @dev emits URI event per the ERC 1155 standard
    *   @param newURI is the base URI set for each token
    *   @param tokenId is the token id
    */
    function setURI(uint256 tokenId, string memory newURI) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        require(!tokenDetails[tokenId].frozen, "ERC1155TLCore: Token metadata frozen");
        tokenDetails[tokenId].uri = newURI;
        emit URI(newURI, tokenId);
    }

    /**
    *   @notice set token mint status
    *   @dev requires admin or owner
    *   @param tokenId is the token id
    *   @param status is the desired status
    */
    function setMintStatus(uint256 tokenId, bool status) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        tokenDetails[tokenId].mintStatus = status;
    }

    /**
    *   @notice function to change the royalty recipient
    *   @dev requires admin or owner
    *   @dev this is useful if an account gets compromised or anything like that
    *   @param tokenId is the token id to assign this address to
    *   @param newRecipient is the new royalty recipient
    */
    function setRoyaltyRecipient(uint256 tokenId, address newRecipient) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        setRoyaltyInfo(tokenId, newRecipient, royaltyPerc[tokenId]);
    }

    /**
    *   @notice function to change the royalty percentage
    *   @dev requires admin or owner
    *   @dev this is useful if the amount was set improperly at contract creation.
    *   @param tokenId is the token id
    *   @param newPerc is the new royalty percentage, in basis points (out of 10,000)
    */
    function setRoyaltyPercentage(uint256 tokenId, uint256 newPerc) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        setRoyaltyInfo(tokenId, royaltyAddr[tokenId], newPerc);
    }

    /**
    *   @notice function for batch minting the token to many addresses
    *   @dev requires owner or admin
    *   @dev airdrop not subject to mint allowance constraints
    *   @param tokenId is the token id to airdrop
    *   @param addresses is an array of addresses to mint to
    */
    function airdrop(uint256 tokenId, address[] calldata addresses) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        require(tokenDetails[tokenId].availableSupply >= addresses.length, "ERC1155TLCore: Not enough token supply available");

        tokenDetails[tokenId].availableSupply -= uint64(addresses.length);
        
        for (uint256 i; i < addresses.length; i++) {
            _mint(addresses[i], tokenId, 1, "");
        }
    }

    /**
    *   @notice function for minting to the owner's address
    *   @dev requires owner or admin
    *   @dev not subject to mint allowance constraints
    *   @param tokenId is the token id to airdrop
    *   @param numToMint is the number to mint
    */
    function ownerMint(uint256 tokenId, uint256 numToMint) external virtual adminOrOwner {
        require(tokenDetails[tokenId].created, "ERC1155TLCore: Token ID not valid");
        require(tokenDetails[tokenId].availableSupply >= numToMint, "ERC1155TLCore: Not enough token supply available");

        tokenDetails[tokenId].availableSupply -= uint64(numToMint);
        
        _mint(owner(), tokenId, numToMint, "");
    }

    /**
    *   @notice function to withdraw ether from the contract
    *   @dev requires admin or owner
    */
    function withdrawEther() external virtual adminOrOwner {
        payoutAddress.transfer(address(this).balance);
    }

    /**
    *   @notice function to set the admin address on the contract
    *   @dev requires owner
    *   @param newAdmin is the new admin address
    */
    function setAdminAddress(address newAdmin) external virtual onlyOwner {
        require(newAdmin != address(0), "ERC1155TLCore: New admin cannot be the zero address");
        adminAddress = newAdmin;
    }

    /**
    *   @notice function to set the payout address
    *   @dev requires owner
    *   @param payoutAddr is the new payout address
    */
    function setPayoutAddress(address payoutAddr) external virtual onlyOwner {
        require(payoutAddr != address(0), "ERC1155TLCore: Payout address cannot be the zero address");
        payoutAddress = payable(payoutAddr);
    }

    /**
    *   @notice function for users to mint
    *   @dev requires payment
    *   @param tokenId is the token id to mint
    *   @param numToMint is the amount to mint
    *   @param merkleProof is the has for merkle proof verification
    */
    function mint(uint256 tokenId, uint16 numToMint, bytes32[] calldata merkleProof) external virtual payable isEOA {
        TokenDetails storage token = tokenDetails[tokenId];
        require(token.created, "ERC1155TLCore: Token ID not valid");
        require(token.availableSupply >= numToMint, "ERC1155TLCore: Not enough token supply available");
        require(token.mintStatus == true, "ERC1155TLCore: Mint not open");
        require(msg.value >= token.price*uint256(numToMint), "ERC1155TLCore: Not enough ether attached to the transaction");
        require(token.numMinted[msg.sender] + numToMint <= token.mintAllowance, "ERC1155TLCore: Cannot mint more than allowed");
        if (token.merkleRoot != bytes32(0)) {
            bytes32 leaf = keccak256(abi.encodePacked(msg.sender));
            require(MerkleProof.verify(merkleProof, token.merkleRoot, leaf), "ERC1155TLCore: Not on allowlist");
        }

        token.numMinted[msg.sender] += numToMint;
        token.availableSupply -= uint64(numToMint);

        _mint(msg.sender, tokenId, uint256(numToMint), "");
    }

    /**
    *   @notice function to return available token supply
    *   @dev does not throw for non-existent tokens
    *   @param tokenId is the token id
    *   @return uint64 representing available supply
    */
    function getTokenSupply(uint256 tokenId) external view virtual returns(uint64) {
        return tokenDetails[tokenId].availableSupply;
    }

    /**
    *   @notice function to return mint allowance for a token
    *   @dev does not throw for non-existent tokens
    *   @param tokenId is the token id
    *   @return uint16 representing mint allowance
    */
    function getMintAllowance(uint256 tokenId) external view virtual returns(uint16) {
        return tokenDetails[tokenId].mintAllowance;
    }

    /**
    *   @notice function to see how many tokens and address has minted
    *   @dev does not throw for non-existent tokens
    *   @param tokenId is the token id
    *   @param addr is the address to check
    *   @return uint16 indicating number minted
    */
    function getNumMinted(uint256 tokenId, address addr) external view virtual returns (uint16) {
        return tokenDetails[tokenId].numMinted[addr];
    }

    /**
    *   @notice function to see the mint status for a token
    *   @dev does not throw for non-existent tokens
    *   @param tokenId is the token id
    *   @return boolean indicating mint status
    */
    function getMintStatus(uint256 tokenId) external view virtual returns (bool) {
        return tokenDetails[tokenId].mintStatus;
    }

    /**
    *   @notice function to see the price for a token
    *   @dev does not throw for non-existent tokens
    *   @param tokenId is the token id
    *   @return uint256 with price in Wei
    */
    function getTokenPrice(uint256 tokenId) external view virtual returns (uint256) {
        return tokenDetails[tokenId].price;
    }

    /**
    *   @notice function to see the merkle root for a token
    *   @dev does not throw for non-existent tokens
    *   @param tokenId is the token id
    *   @return bytes32 with merkle root
    */
    function getMerkleRoot(uint256 tokenId) external view virtual returns (bytes32) {
        return tokenDetails[tokenId].merkleRoot;
    }

    /**
    *   @notice overrides supportsInterface function
    *   @param interfaceId is supplied from anyone/contract calling this function, as defined in ERC 165
    *   @return a boolean saying if this contract supports the interface or not
    */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC1155, EIP2981MultiToken) returns (bool) {
        return super.supportsInterface(interfaceId);
    }

    /**
    *   @notice function to return uri for a specific token type
    *   @param tokenId is the uint256 representation of a token ID
    *   @return string representing the uri for the token id
    */
    function uri(uint256 tokenId) public view override returns (string memory) {
        return tokenDetails[tokenId].uri;
    }   
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC1155/ERC1155.sol)

pragma solidity ^0.8.0;

import "IERC1155.sol";
import "IERC1155Receiver.sol";
import "IERC1155MetadataURI.sol";
import "Address.sol";
import "Context.sol";
import "ERC165.sol";

/**
 * @dev Implementation of the basic standard multi-token.
 * See https://eips.ethereum.org/EIPS/eip-1155
 * Originally based on code by Enjin: https://github.com/enjin/erc-1155
 *
 * _Available since v3.1._
 */
contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
    using Address for address;

    // Mapping from token ID to account balances
    mapping(uint256 => mapping(address => uint256)) private _balances;

    // Mapping from account to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
    string private _uri;

    /**
     * @dev See {_setURI}.
     */
    constructor(string memory uri_) {
        _setURI(uri_);
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC1155).interfaceId ||
            interfaceId == type(IERC1155MetadataURI).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC1155MetadataURI-uri}.
     *
     * This implementation returns the same URI for *all* token types. It relies
     * on the token type ID substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * Clients calling this function must replace the `\{id\}` substring with the
     * actual token type ID.
     */
    function uri(uint256) public view virtual override returns (string memory) {
        return _uri;
    }

    /**
     * @dev See {IERC1155-balanceOf}.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) public view virtual override returns (uint256) {
        require(account != address(0), "ERC1155: balance query for the zero address");
        return _balances[id][account];
    }

    /**
     * @dev See {IERC1155-balanceOfBatch}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] memory accounts, uint256[] memory ids)
        public
        view
        virtual
        override
        returns (uint256[] memory)
    {
        require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch");

        uint256[] memory batchBalances = new uint256[](accounts.length);

        for (uint256 i = 0; i < accounts.length; ++i) {
            batchBalances[i] = balanceOf(accounts[i], ids[i]);
        }

        return batchBalances;
    }

    /**
     * @dev See {IERC1155-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC1155-isApprovedForAll}.
     */
    function isApprovedForAll(address account, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[account][operator];
    }

    /**
     * @dev See {IERC1155-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) public virtual override {
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: caller is not owner nor approved"
        );
        _safeTransferFrom(from, to, id, amount, data);
    }

    /**
     * @dev See {IERC1155-safeBatchTransferFrom}.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) public virtual override {
        require(
            from == _msgSender() || isApprovedForAll(from, _msgSender()),
            "ERC1155: transfer caller is not owner nor approved"
        );
        _safeBatchTransferFrom(from, to, ids, amounts, data);
    }

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: transfer to the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
        unchecked {
            _balances[id][from] = fromBalance - amount;
        }
        _balances[id][to] += amount;

        emit TransferSingle(operator, from, to, id, amount);

        _afterTokenTransfer(operator, from, to, ids, amounts, data);

        _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _safeBatchTransferFrom(
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");
        require(to != address(0), "ERC1155: transfer to the zero address");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, from, to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; ++i) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: insufficient balance for transfer");
            unchecked {
                _balances[id][from] = fromBalance - amount;
            }
            _balances[id][to] += amount;
        }

        emit TransferBatch(operator, from, to, ids, amounts);

        _afterTokenTransfer(operator, from, to, ids, amounts, data);

        _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data);
    }

    /**
     * @dev Sets a new URI for all token types, by relying on the token type ID
     * substitution mechanism
     * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP].
     *
     * By this mechanism, any occurrence of the `\{id\}` substring in either the
     * URI or any of the amounts in the JSON file at said URI will be replaced by
     * clients with the token type ID.
     *
     * For example, the `https://token-cdn-domain/\{id\}.json` URI would be
     * interpreted by clients as
     * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json`
     * for token type ID 0x4cce0.
     *
     * See {uri}.
     *
     * Because these URIs cannot be meaningfully represented by the {URI} event,
     * this function emits no events.
     */
    function _setURI(string memory newuri) internal virtual {
        _uri = newuri;
    }

    /**
     * @dev Creates `amount` tokens of token type `id`, and assigns them to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function _mint(
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        _balances[id][to] += amount;
        emit TransferSingle(operator, address(0), to, id, amount);

        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

        _doSafeTransferAcceptanceCheck(operator, address(0), to, id, amount, data);
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function _mintBatch(
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {
        require(to != address(0), "ERC1155: mint to the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, address(0), to, ids, amounts, data);

        for (uint256 i = 0; i < ids.length; i++) {
            _balances[ids[i]][to] += amounts[i];
        }

        emit TransferBatch(operator, address(0), to, ids, amounts);

        _afterTokenTransfer(operator, address(0), to, ids, amounts, data);

        _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data);
    }

    /**
     * @dev Destroys `amount` tokens of token type `id` from `from`
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `from` must have at least `amount` tokens of token type `id`.
     */
    function _burn(
        address from,
        uint256 id,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC1155: burn from the zero address");

        address operator = _msgSender();
        uint256[] memory ids = _asSingletonArray(id);
        uint256[] memory amounts = _asSingletonArray(amount);

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        uint256 fromBalance = _balances[id][from];
        require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
        unchecked {
            _balances[id][from] = fromBalance - amount;
        }

        emit TransferSingle(operator, from, address(0), id, amount);

        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
    }

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     */
    function _burnBatch(
        address from,
        uint256[] memory ids,
        uint256[] memory amounts
    ) internal virtual {
        require(from != address(0), "ERC1155: burn from the zero address");
        require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch");

        address operator = _msgSender();

        _beforeTokenTransfer(operator, from, address(0), ids, amounts, "");

        for (uint256 i = 0; i < ids.length; i++) {
            uint256 id = ids[i];
            uint256 amount = amounts[i];

            uint256 fromBalance = _balances[id][from];
            require(fromBalance >= amount, "ERC1155: burn amount exceeds balance");
            unchecked {
                _balances[id][from] = fromBalance - amount;
            }
        }

        emit TransferBatch(operator, from, address(0), ids, amounts);

        _afterTokenTransfer(operator, from, address(0), ids, amounts, "");
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC1155: setting approval status for self");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `id` and `amount` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    /**
     * @dev Hook that is called after any token transfer. This includes minting
     * and burning, as well as batched variants.
     *
     * The same hook is called on both single and batched variants. For single
     * transfers, the length of the `id` and `amount` arrays will be 1.
     *
     * Calling conditions (for each `id` and `amount` pair):
     *
     * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * of token type `id` will be  transferred to `to`.
     * - When `from` is zero, `amount` tokens of token type `id` will be minted
     * for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens of token type `id`
     * will be burned.
     * - `from` and `to` are never both zero.
     * - `ids` and `amounts` have the same, non-zero length.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) internal virtual {}

    function _doSafeTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes memory data
    ) private {
        if (to.isContract()) {
            try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) {
                if (response != IERC1155Receiver.onERC1155Received.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non ERC1155Receiver implementer");
            }
        }
    }

    function _doSafeBatchTransferAcceptanceCheck(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    ) private {
        if (to.isContract()) {
            try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (
                bytes4 response
            ) {
                if (response != IERC1155Receiver.onERC1155BatchReceived.selector) {
                    revert("ERC1155: ERC1155Receiver rejected tokens");
                }
            } catch Error(string memory reason) {
                revert(reason);
            } catch {
                revert("ERC1155: transfer to non ERC1155Receiver implementer");
            }
        }
    }

    function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) {
        uint256[] memory array = new uint256[](1);
        array[0] = element;

        return array;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

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

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

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

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

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

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

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

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// 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 v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "IERC165.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/extensions/IERC1155MetadataURI.sol)

pragma solidity ^0.8.0;

import "IERC1155.sol";

/**
 * @dev Interface of the optional ERC1155MetadataExtension interface, as defined
 * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155MetadataURI is IERC1155 {
    /**
     * @dev Returns the URI for token type `id`.
     *
     * If the `\{id\}` substring is present in the URI, it must be replaced by
     * clients with the actual token type ID.
     */
    function uri(uint256 id) external view returns (string memory);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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

                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 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 v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "Context.sol";

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

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/cryptography/MerkleProof.sol)

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 *
 * WARNING: You should avoid using leaf values that are 64 bytes long prior to
 * hashing, or use a hash function other than keccak256 for hashing leaves.
 * This is because the concatenation of a sorted pair of internal nodes in
 * the merkle tree could be reinterpreted as a leaf value.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = _efficientHash(computedHash, proofElement);
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = _efficientHash(proofElement, computedHash);
            }
        }
        return computedHash;
    }

    function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) {
        assembly {
            mstore(0x00, a)
            mstore(0x20, b)
            value := keccak256(0x00, 0x40)
        }
    }
}

// SPDX-License-Identifier: MIT

/**
*   @title EIP 2981 base contract
*   @notice EIP 2981 implementation for differing royalties based on token number
*   @author Transient Labs, LLC
*/

/*
   ___                            __  __          ______                  _          __    __        __     
  / _ \___ _    _____ _______ ___/ / / /  __ __  /_  __/______ ____  ___ (_)__ ___  / /_  / /  ___ _/ /  ___
 / ___/ _ \ |/|/ / -_) __/ -_) _  / / _ \/ // /   / / / __/ _ `/ _ \(_-</ / -_) _ \/ __/ / /__/ _ `/ _ \(_-<
/_/   \___/__,__/\__/_/  \__/\_,_/ /_.__/\_, /   /_/ /_/  \_,_/_//_/___/_/\__/_//_/\__/ /____/\_,_/_.__/___/
                                        /___/                                                               
*/

pragma solidity ^0.8.9;

import "ERC165.sol";
import "IEIP2981.sol";

contract EIP2981MultiToken is IEIP2981, ERC165 {

    mapping(uint256 => address) internal royaltyAddr;
    mapping(uint256 => uint256) internal royaltyPerc; // percentage in basis (out of 10,000)

    /**
    *   @notice EIP 2981 royalty support
    */
    function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view virtual override returns (address receiver, uint256 royaltyAmount) {
        return (royaltyAddr[_tokenId], royaltyPerc[_tokenId] * _salePrice / 10000);
    }

    /**
    *   @notice override ERC 165 implementation of this function
    *   @dev if using this contract with another contract that suppports ERC 165, will have to override in the inheriting contract
    */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165) returns (bool) {
        return interfaceId == type(IEIP2981).interfaceId || super.supportsInterface(interfaceId);
    }

    /**
    *   @notice function to set royalty information for a token
    *   @dev to be called by inheriting contract
    *   @param _tokenId is the token id
    *   @param _addr is the royalty payout address for this token id
    *   @param _perc is the royalty percentage (out of 10,000) to set for this token id
    */
    function setRoyaltyInfo(uint256 _tokenId, address _addr, uint256 _perc) internal virtual {
        require(_addr != address(0), "EIP2981MultiToken: Cannot set royalty receipient to the zero address");
        require(_perc < 10000, "EIP2981MultiToken: Cannot set royalty percentage above 10000");
        royaltyAddr[_tokenId] = _addr;
        royaltyPerc[_tokenId] = _perc;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.9;

///
/// @dev Interface for the NFT Royalty Standard
///
interface IEIP2981 {
    /// ERC165 bytes to add to interface array - set in parent contract
    /// implementing this standard
    ///
    /// bytes4(keccak256("royaltyInfo(uint256,uint256)")) == 0x2a55205a

    /// @notice Called with the sale price to determine how much royalty
    //          is owed and to whom.
    /// @param _tokenId - the NFT asset queried for royalty information
    /// @param _salePrice - the sale price of the NFT asset specified by _tokenId
    /// @return receiver - address of who should be sent the royalty payment
    /// @return royaltyAmount - the royalty payment amount for _salePrice
    function royaltyInfo(uint256 _tokenId, uint256 _salePrice) external view returns (address receiver,uint256 royaltyAmount);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

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00000000000000000000000072dbe00de00edf158aebee2c82b7e2f19a8c19a80000000000000000000000004616e6f01b789567c479d4d1a9697fd5eb05c6ef

-----Decoded View---------------
Arg [0] : _admin (address): 0x72DBe00dE00eDF158AEbEE2c82B7E2f19A8c19a8
Arg [1] : _payout (address): 0x4616E6f01b789567C479d4D1A9697fd5eb05c6ef

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000072dbe00de00edf158aebee2c82b7e2f19a8c19a8
Arg [1] : 0000000000000000000000004616e6f01b789567c479d4d1a9697fd5eb05c6ef