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/// @title EIP-721 Metadata Update Extension
interface IERC4906 is IERC165, IERC721 {
    /// @dev This event emits when the metadata of a token is changed.
    /// So that the third-party platforms such as NFT market could
    /// timely update the images and related attributes of the NFT.
    event MetadataUpdate(uint256 _tokenId);

    /// @dev This event emits when the metadata of a range of tokens is changed.
    /// So that the third-party platforms such as NFT market could
    /// timely update the images and related attributes of the NFTs.    
    event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);
}

modifier protectOrigin() {
    if (tx.origin != msg.sender) {
        if (block.number == _contractLastBlockNumber(tx.origin)) {
            revert ContractTransactionLimitReached();
        }
        _contractLastBlockNumber[tx.origin] = block.number;
    }
    _;
}