WO2024022089A1

WO2024022089A1 - Data processing method and verification method, apparatus, electronic device, and storage medium

Info

Publication number: WO2024022089A1
Application number: PCT/CN2023/106372
Authority: WO
Inventors: 孔令涛; 蒋宁; 郝征鹏
Original assignee: 马上消费金融股份有限公司
Priority date: 2022-07-28
Filing date: 2023-07-07
Publication date: 2024-02-01
Also published as: CN117527244A

Abstract

The present disclosure relates to a data processing method and verification method, an apparatus, an electronic device, and a storage medium. The data processing method comprises: obtaining first identification information corresponding to the metadata of a target NFT, wherein the metadata of the target NFT comprises identification information corresponding to certificate information data associated with the target NFT, and also the address of a certificate verification contract used for verifying the target NFT; calling an NFT creation contract to create a target NFT based on the first identification information; obtaining second identification information corresponding to the metadata of a certificate NFT associated with the target NFT, wherein the metadata of the certificate NFT comprises information related to the NFT creation contract and also certificate information data; and calling a certificate creation contract to create a certificate NFT based on the second identification information, wherein the certificate creation contract corresponds to the certificate verification contract.

Description

Data processing methods and verification methods, devices, electronic equipment and storage media

This application claims priority to the Chinese patent application with application number 202210897905.8 and titled "Data processing method and verification method, device, electronic device and storage medium" submitted on July 28, 2022. The content of the above application is incorporated by reference. Enter this article.

Technical field

The present disclosure relates to the field of blockchain technology, and more specifically, to a data processing method, a data verification method, a device, an electronic device, a computer-readable storage medium and a computer program product.

Background technique

NFT (Non-Fungible Token, non-fungible token) is a digital asset rights certificate based on blockchain technology, that is, a unique cryptocurrency token that represents digital assets. When a digital asset is created as an NFT, it will be permanently stored on the blockchain, unique and unchangeable. With the development of blockchain technology, more and more artists, musicians and content creators are selling their works in the form of NFT.

As provably unique tokens, NFTs represent traceable value to their owners, even when reduced to a simple Joint Photographic Experts Group (JPEG) format. The prospects of NFT are concrete. Web 2.0 reduces the cost of social interaction between Internet users and soon has an impact on users' online/offline interactions. Web 3.0 solves the trust problem by including the verification process in smart contracts. As the NFT market booms, NFTs spread like wildfire and are widely popularized through social media, entertainment, etc.

Contents of the invention

The present disclosure provides a data processing method, a data verification method, a device, an electronic device, a computer-readable storage medium and a computer program product.

According to a first aspect of an embodiment of the present disclosure, a data processing method is provided, including: obtaining first identification information corresponding to the metadata of the target NFT, where the first identification information is the metadata of the target NFT stored in a block The identification information obtained after the chain, wherein the metadata of the target NFT includes identification information corresponding to the certificate information data associated with the target NFT, and the address of the certificate verification contract used to verify the target NFT, so The identification information corresponding to the certificate information data is the identification information obtained after the certificate information data is stored in the blockchain; call the NFT creation contract to create the target NFT based on the first identification information; obtain the association with the target NFT The second identification information corresponding to the metadata of the certificate NFT, wherein the metadata of the certificate NFT includes relevant information of the NFT creation contract and the certificate information data, and the second identification information is the certificate NFT The identification information obtained after the metadata is stored in the blockchain; the certificate creation contract is called to create the certificate NFT based on the second identification information, where the certificate creation contract corresponds to the certificate verification contract.

According to a second aspect of an embodiment of the present disclosure, a data verification method is provided, including: calling a certificate verification contract to verify the target NFT based on metadata of the target NFT and metadata of the certificate NFT associated with the target NFT. ; Output verification results; wherein, the target NFT is created by an NFT creation contract based on the first identification information corresponding to the metadata of the target NFT, and the certificate NFT is created by a certificate corresponding to the certificate verification contract The contract is created based on the second identification information corresponding to the metadata of the certificate NFT. The metadata of the target NFT includes the identification information corresponding to the certificate information data associated with the target NFT, and the second identification information for the target NFT. The address of the certificate verification contract to be verified. The metadata of the certificate NFT includes relevant information of the NFT creation contract and the certificate information data. The first identification information is the metadata of the target NFT stored in The identification information obtained after the blockchain. The identification information corresponding to the certificate information data is the identification information obtained after the certificate information data is stored in the blockchain. The second identification information is the metadata storage of the certificate NFT. The identification information obtained after entering the blockchain.

According to a third aspect of an embodiment of the present disclosure, a data processing device is provided, including: a first identification information acquisition unit configured to obtain first identification information corresponding to metadata of a target NFT, where the first identification information is the The identification information obtained after the metadata of the target NFT is stored in the blockchain, wherein the metadata of the target NFT includes identification information corresponding to the certificate information data associated with the target NFT, and information used to identify the target NFT. The address of the certificate verification contract to be verified. The identification information corresponding to the certificate information data is the identification information obtained after the certificate information data is stored in the blockchain; the target NFT creation unit is configured to call the NFT creation contract to create a contract based on the The first identification information creates the target NFT; a second identification information acquisition unit is configured to obtain the second identification information corresponding to the metadata of the certificate NFT associated with the target NFT, wherein the metadata of the certificate NFT Including relevant information of the NFT creation contract and the certificate information data, the second identification information is the identification information obtained after the metadata of the certificate NFT is stored in the blockchain; the certificate NFT creation unit is configured to call A certificate creation contract is used to create the certificate NFT based on the second identification information, wherein the certificate creation contract corresponds to the certificate verification contract.

According to a fourth aspect of an embodiment of the present disclosure, a data verification device is provided, which is characterized in that it includes: a target NFT verification unit configured to call a certificate verification contract to based on the metadata of the target NFT and the data associated with the target NFT. The metadata of the certificate NFT verifies the target NFT; the verification result output unit is configured to output the verification result; wherein the target NFT is created by the NFT creation contract based on the first identification information corresponding to the metadata of the target NFT The certificate NFT is created by the certificate creation contract corresponding to the certificate verification contract based on the second identification information corresponding to the metadata of the certificate NFT, and the metadata of the target NFT includes the metadata of the target NFT. The identification information corresponding to the associated certificate information data and the address of the certificate verification contract used to verify the target NFT. The metadata of the certificate NFT includes relevant information of the NFT creation contract and the certificate information. data, the first identification information is the identification information obtained after the metadata of the target NFT is stored in the blockchain, and the identification information corresponding to the certificate information data is obtained after the certificate information data is stored in the blockchain. Identification information, the second identification information is the identification information obtained after the metadata of the certificate NFT is stored in the blockchain.

According to a fifth aspect of an embodiment of the present disclosure, an electronic device is provided, including: at least one processor; at least one memory storing computer-executable instructions, wherein the computer-executable instructions are executed by the at least one processor When the at least one processor is prompted to execute the data processing method or data verification method according to the present disclosure.

According to a sixth aspect of an embodiment of the present disclosure, there is provided a computer-readable storage medium that, when instructions in the computer-readable storage medium are executed by at least one processor, causes the at least one processor to execute the method according to the present disclosure. Data processing methods or data validation methods.

According to a seventh aspect of an embodiment of the present disclosure, a computer program product is provided, including computer instructions that, when executed by at least one processor, implement a data processing method or a data verification method according to the present disclosure.

According to an eighth aspect of an embodiment of the present disclosure, a computer program is provided. When the computer program is executed by a processor, Implement the data processing method or data verification method according to the present disclosure.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and do not limit the present disclosure.

Description of drawings

The drawings herein are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the disclosure, and together with the description are used to explain the principles of the disclosure, and do not constitute undue limitations on the disclosure.

Figure 1 is an NFT creation flow chart showing related technologies;

2 is a conceptual block diagram of data processing and verification according to an exemplary embodiment of the present disclosure;

3 is a flowchart illustrating a data processing method according to an exemplary embodiment of the present disclosure;

4 is a schematic diagram illustrating metadata of a target NFT according to an exemplary embodiment of the present disclosure;

FIG. 5 is a schematic diagram illustrating metadata of a certificate NFT according to an exemplary embodiment of the present disclosure;

6 is a flowchart illustrating a data verification method according to an exemplary embodiment of the present disclosure;

7 is a flowchart illustrating a specific creation process of an NFT with a certificate according to an exemplary embodiment of the present disclosure;

8 is a flowchart illustrating a specific verification process of NFT with certificates according to an exemplary embodiment of the present disclosure;

9 is a block diagram illustrating a data processing apparatus according to an exemplary embodiment of the present disclosure;

10 is a block diagram illustrating a data verification device according to an exemplary embodiment of the present disclosure;

FIG. 11 is a block diagram of an electronic device 1100 according to an exemplary embodiment of the present disclosure.

Detailed ways

In order to allow ordinary people in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings.

It should be noted that the terms "first", "second", etc. in the description and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances so that the embodiments of the disclosure described herein can be practiced in sequences other than those illustrated or described herein. The implementations described in the following examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with aspects of the disclosure as detailed in the appended claims.

It should be noted here that “at least one of the several items” appearing in this disclosure means including “any one of the several items”, “a combination of any of the several items”, The three types of juxtaposition of "all of the items". For example, "including at least one of A and B" includes the following three parallel situations: (1) including A; (2) including B; (3) including A and B. For another example, "perform at least one of step 1 and step 2" means the following three parallel situations: (1) execute step 1; (2) execute step 2; (3) execute step 1 and step 2.

Currently, NFTs can be created through smart contracts that comply with some common protocols (for example, ERC-721 protocol, etc.). FIG. 1 is an NFT creation flowchart showing related technology. Referring to Figure 1, in step 101, the NFT creator can upload the NFT object (digital file) to a centralized cloud storage or decentralized blockchain (for example, InterPlanetary File System (IPFS) or AR ( Arweave), etc.), obtain the identification information corresponding to the NFT object, for example, token (ie, token or unique identification). Here, digital files can be pictures, videos, audios, data Any digitizable file such as word (virtual) artwork. In step 102, the NFT creator can organize the metadata of the NFT based on the identification information corresponding to the NFT object, store the metadata of the NFT in a decentralized blockchain (for example, IPFS or AR, etc.), and obtain the metadata of the NFT. Identification information corresponding to the data, for example, token. In step 103, the NFT is created through a smart contract based on the identification information corresponding to the NFT's metadata. Specifically, the smart contract can generate unique identification information, such as token, based on the identification information corresponding to the metadata of the NFT. This unique identification information is the NFT. Here, the token can be a hash value obtained through a hash algorithm. Since the hash algorithm has the characteristics of one-way and collision resistance, each hash value can uniquely correspond to an original content and cannot be tampered with. Therefore, Each token can be used to uniquely identify the corresponding data.

However, because NFT is still in its early stages of development, there are still many problems that have not been perfected. For example, some people steal other people's artistic works without the original consent and make NFTs for sale on various platforms. For example, fraudsters use SleepMinting technology to forge other people's valuable NFTs and deceive others into purchasing them. SleepMinting is an NFT forgery method that forges the NFT creator and NFT creation process through the writing of smart contracts. For example, fraudsters copy the original file of an NFT created by a famous artist, create an NFT in the name of the famous artist, and at the same time forge transaction records to make it appear that the NFT was traded from the famous artist's account, thereby defrauding others. Purchase this NFT. In other words, a fraudster can bypass the account of the creator (i.e., a famous artist) by writing a smart contract with loopholes, and forge an NFT in the name of the creator.

Since the NFT creation contract is written by developers themselves, fraudsters, as developers, subjectively write backdoors and cannot control the fraudster's personal behavior. In this regard, if a common protocol (for example, ERC-721 protocol) is upgraded to include data audit-related content, such SleepMinting fraud can be prevented. In addition, if the NFT trading platform adds data verification, it can prevent the NFT listing platform from such SleepMinting fraud, but it cannot prevent the use of SleepMinting fraud to create NFT.

Currently, there is no method that can effectively prevent or verify NFT theft or forgery. In order to solve this problem, the present disclosure provides a data processing method and a data verification method, through a pair of smart contracts (i.e., one smart contract for Create a certificate NFT with relevant certificate data for the target NFT, and another smart contract is used to verify the validity of the certificate data), create an anti-counterfeiting certificate NFT for the target NFT, and use the certificate NFT to verify the authenticity of the target NFT. In other words, the target NFT can be protected by certificate NFT, thereby ensuring the authenticity of the NFT creation process, preventing fraud such as SleepMinting, and protecting the rights and interests of NFT creators and NFT collectors. This disclosure utilizes the non-tampering characteristics of blockchain technology to save the certificate information data of the certificate NFT, so that the certificate NFT can be used to verify the authenticity of the target NFT.

Below, the data processing method and device and the data verification method and device according to the present disclosure will be described in detail with reference to FIGS. 2 to 11 .

2 is a conceptual block diagram of data processing and verification according to an exemplary embodiment of the present disclosure.

Referring to Figure 2, for the data processing process, first, the user (for example, NFT creator) creates the target NFT through the NFT creation contract in the blockchain (for example, Ethereum, etc.) based on the data used to verify the target NFT. That is, the user authorizes the NFT creation contract to create the target NFT. Here, the NFT creation contract refers to the smart contract used to create NFT. A target NFT may refer to an NFT created by an NFT creator for its NFT subject (for example, a digital file of a picture, video, etc.). In addition, the NFT creator is not the same as the NFT creator. The NFT creator can create NFT as the NFT creator, or authorize the NFT creator to create NFT. Subsequently, after the target NFT is created, the user (e.g., the NFT creator) creates a contract through the certificate in the blockchain, based on the data used to verify the target NFT and the target NFT For related information, create a certificate NFT related to the target NFT. That is, the user authorizes the certificate creation contract to create the certificate NFT. Here, the certificate creation contract refers to the smart contract used to create the certificate NFT. After the target NFT and certificate NFT are created, they will be deposited into the NFT creator's account.

Since the creation process of the target NFT and the creation process of the certificate NFT use information that uniquely identifies each other, that is to say, the creation process of the target NFT uses information that can uniquely identify the certificate information, and the creation process of the certificate NFT uses information that can uniquely identify each other. Information that identifies the target NFT so that the target NFT can be associated with its certificate NFT and the certificate NFT can be used to verify the authenticity of the target NFT. In addition, during the creation process of the certificate NFT, the certificate creation contract can obtain data from the blockchain (e.g., IPFS, AR, etc.) ) Obtain the metadata of the certificate NFT and verify its correctness to ensure that the created certificate NFT is indeed the certificate NFT of the target NFT. Here, the third-party oracle refers to the server that connects the off-chain data of the blockchain with the smart contracts on the chain. Since the blockchain where the certificate creation contract is located is different from the blockchain where the metadata of the certificate NFT is stored, the certificate creation contract cannot directly obtain the metadata of the certificate NFT and needs to obtain the metadata of the certificate NFT through a third-party oracle. metadata.

For the data verification process, users can call the certificate verification contract through the client to verify the target NFT. For example, when a user sees the target NFT and its related information on the trading platform, he or she can use web3.js to call the certificate verification contract through the client (for example, a browser), and input the relevant information of the target NFT into the certificate verification contract. The certificate verification contract can Based on the relevant information of the target NFT, through interaction with a third-party oracle (e.g., Chainlink Oracle Network, etc.), from the blockchain that stores the metadata of the target NFT and the certificate associated with the target NFT, the metadata of the NFT (e.g., IPFS, AR, etc.) obtains the metadata of the target NFT and the metadata of the certificate NFT, so as to verify the authenticity of the target NFT based on the metadata of the target NFT and the metadata of the certificate NFT. Here, the certificate creation contract used in the NFT creation process and the certificate verification contract used in the NFT verification process are a pair of smart contracts. Since the blockchain where the certificate verification contract is located is different from the blockchain that stores the metadata of the target NFT and the metadata of the certificate NFT, the certificate verification contract cannot directly obtain the metadata of the target NFT and the metadata of the certificate NFT. , it is necessary to obtain the metadata of the certificate NFT through a third-party oracle.

Therefore, through the above-mentioned data processing process and data verification process of the present disclosure, a pair of smart contracts (certificate creation contract and certificate verification contract) can be used to create an anti-counterfeiting certificate NFT for the target NFT, and verify the target NFT through the relevant data of the certificate NFT authenticity and prevent NFT fraud.

3 is a flowchart illustrating a data processing method according to an exemplary embodiment of the present disclosure.

Referring to Figure 3, in step 301, first identification information corresponding to the metadata of the target NFT can be obtained. Here, the target NFT may refer to the NFT created by the NFT creator for its NFT object (for example, digital files of pictures, videos, etc.).

According to an exemplary embodiment of the present disclosure, the metadata of the target NFT may include identification information corresponding to the NFT object and any description information related to the NFT object. Here, the identification information corresponding to the NFT object may be the identification information obtained after the NFT object is stored in the blockchain or cloud storage, and is used to indicate the storage address of the NFT object. Of course, the metadata of the target NFT is not limited to the above information.

According to an exemplary embodiment of the present disclosure, in order to generate a target NFT with a certificate, the metadata of the target NFT may include data for verifying the target NFT. For example, the metadata of the target NFT may also include, but is not limited to, identification information corresponding to the certificate information data associated with the target NFT, and the address of the certificate verification contract used to verify the target NFT. Here, the certificate information data may include data used by the certificate verification contract to verify the target NFT. The identification information corresponding to the certificate information data can be the identification information obtained after the certificate information data is stored in the blockchain, using To indicate the storage address of certificate information data in the blockchain. The address of the certificate verification contract refers to the storage address of the certificate verification contract in the blockchain. Here, the identification information may be, but is not limited to, a hash value generated by a hash algorithm, called a token, which is used to uniquely identify the corresponding data.

4 is a schematic diagram illustrating metadata of a target NFT according to an exemplary embodiment of the present disclosure.

Referring to Figure 4, the metadata of the target NFT may include identification information corresponding to the NFT object, description information corresponding to the NFT object, the address of the certificate verification contract, and identification information corresponding to the certificate information data.

According to an exemplary embodiment of the present disclosure, the certificate information data may include, but is not limited to, at least one of the following items: NFT target address, NFT creation contract address, certificate verification contract address, NFT creator account address, NFT creation The person’s public key, NFT creator’s signature, and NFT creator’s signature expiration time. Here, the address of the NFT object refers to the storage address of the NFT object in the blockchain or cloud storage. The NFT creation contract address refers to the storage address of the NFT creation contract in the blockchain. The address of the certificate verification contract refers to the storage address of the certificate verification contract in the blockchain. The NFT creator's account address refers to the storage address of the target NFT and its certificate NFT after the creation is completed. The hash value of the NFT creator's public key is the NFT creator's account address and can be used for NFT creator encryption or decryption. The NFT creator's signature is obtained by using the NFT creator's private key to encrypt other certificate information data in the certificate information data except the NFT creator's signature. In other words, the NFT creator's private key can be used to encrypt the entire certificate information data (json data) that does not include the NFT creator's signature, and then add the encrypted NFT creator's signature to the certificate information data (json data). . In this way, by using asymmetric encryption to confirm that the NFT creator authorizes the certificate creation contract, the certificate creation contract is bound to the NFT creator. Therefore, the expiration time of the NFT creator's signature refers to the expiration time of the signature authorized by the NFT creator. That is to say, after the expiration time of the NFT creator's signature, the NFT creator's signature becomes invalid. Of course, the certificate information data of this disclosure is not limited to the above data, and may include other certificate information data that you wish to verify as needed, for subsequent use by the certificate verification contract to verify the target NFT.

Referring back to Figure 3, in step 302, the NFT creation contract may be called to create the target NFT based on the first identification information. Specifically, after receiving the first identification information, the NFT creation contract can generate identification information (for example, token) for identifying the first identification information. The generated identification information is the target NFT. After the target NFT is created, the NFT creation contract will deposit the target NFT into the NFT creator's account.

In step 303, second identification information corresponding to the metadata of the certificate NFT related to the target NFT may be obtained. Here, in order to enable the certificate NFT to be used to verify the target NFT, the metadata of the certificate NFT may include information related to the NFT creation contract and certificate information data. Information related to the NFT creation contract refers to information related to the event in which the NFT creation contract creates the target NFT. The second identification information corresponding to the metadata of the certificate NFT may be the identification information obtained after the metadata of the certificate NFT is stored in the blockchain, and is used to indicate the storage address of the metadata of the certificate NFT in the blockchain.

FIG. 5 is a schematic diagram illustrating metadata of a certificate NFT according to an exemplary embodiment of the present disclosure.

Referring to Figure 5, the metadata of the certificate NFT may include information related to the NFT creation contract and certificate information data. According to an exemplary embodiment of the present disclosure, the relevant information of the NFT creation contract may include, but is not limited to, the address of the NFT creation contract and the digital identification (for example, token ID) of the target NFT in the NFT creation contract. After the NFT creation contract creates the target NFT (i.e., target token), the NFT creation contract will mark and record the target NFT by using a digital identification (i.e., token ID). For example, if the target NFT is the 100th NFT created by the NFT creation contract, the target NFT can be marked with 100. Therefore, the token ID of the target NFT is 100. In other words, the NFT creation contract and token ID can uniquely identify an NFT. Therefore, the relevant NFT creation contract The information may include the address of the NFT creation contract and the digital identification of the target NFT in the NFT creation contract, thereby uniquely identifying the target NFT. Of course, the relevant information of the NFT creation contract is not limited to this. For example, the relevant information of the NFT creation contract may not include the digital identification of the target NFT in the NFT creation contract, but include the identification information (token) of the target NFT, that is, the target NFT itself. token value, etc.

Referring back to Figure 3, in step 304, the certificate creation contract may be called to create the certificate NFT based on the second identification information, where the certificate creation contract is a contract corresponding to the certificate verification contract. Specifically, after receiving the second identification information, the certificate creation contract can generate identification information (for example, token) for identifying the second identification information. The generated identification information is the certificate NFT. After the certificate NFT is created, the certificate creation contract will deposit the certificate NFT into the NFT creator's account.

According to an exemplary embodiment of the present disclosure, the certificate creation contract will first verify the metadata of the certificate NFT before creating the certificate NFT, and only use the second identification information to create the certificate NFT after the metadata of the certificate NFT is verified to be correct. , thereby ensuring that the created certificate NFT is indeed the certificate NFT of the target NFT.

According to an exemplary embodiment of the present disclosure, at least one piece of data related to the metadata of the certificate NFT can be verified, and if each piece of data is verified to be correct, then the metadata of the certificate NFT is verified to be correct, This begins creating the certificate NFT. Once the verified data is incorrect, the creation of the certificate NFT will be terminated. For example, at least one of the address of the certificate verification contract, the second identification information, and the creator of the certificate NFT (the creator of the certificate NFT) can be verified.

According to an exemplary embodiment of the present disclosure, it is possible to verify whether the address of the certificate verification contract in the metadata of the certificate NFT is correct, thereby preventing the certificate NFT from being created incorrectly or the certificate NFT after creation being unable to be used for verification. This is because if the address of the certificate verification contract in the metadata of the certificate NFT is incorrect, it means that the certificate verification contract does not correspond to the certificate creation contract that created the certificate NFT, which will cause the certificate NFT to be incorrectly created or the certificate NFT after creation cannot for verification. Since the certificate creation contract and the certificate verification contract are a pair of contracts, if the address of the certificate verification contract is correct, the address of the certificate creation contract is also correct, so you only need to verify the correctness of the address of the certificate verification contract. Through a third-party oracle, the blockchain storing the metadata of the certificate NFT is queried based on the second identification information corresponding to the metadata of the certificate NFT, to obtain the address of the certificate verification contract in the metadata of the certificate NFT. After obtaining the address of the certificate verification contract in the metadata of the certificate NFT, the correctness of the address of the certificate verification contract in the metadata of the certificate NFT can be verified based on the address of the actual certificate verification contract. Since the certificate creation contract and the certificate verification contract are a pair of contracts, the certificate creation contract can determine the address of the actual certificate verification contract, that is, the address of the actual certificate verification contract is determined by the address of the certificate creation contract. For example, if the address of the certificate verification contract in the metadata of the certificate NFT is consistent with the address of the actual certificate verification contract, it is determined that the address of the certificate verification contract in the metadata of the certificate NFT is correct. Otherwise, it is determined that the address of the certificate verification contract in the metadata of the certificate NFT is wrong, and the creation of the certificate NFT is terminated.

According to exemplary embodiments of the present disclosure, it can be verified whether the second identification information corresponding to the metadata of the certificate NFT has been used in the certificate creation contract, thereby preventing the situation where one certificate NFT corresponds to multiple NFT objects. This is because if the second identification information has been used in the certificate creation contract, it means that the certificate NFT has already corresponded to other NFT objects, which will cause the certificate NFT to correspond to multiple NFT objects and lose verification reliability. In other words, the metadata of the certificate NFT should correspond to a unique identification information. Therefore, you can check in the creation record of the certificate creation contract whether the second identification information has been used in the creation of the certificate creation contract. If it is determined that the second identification information has not been used in the creation of the certificate creation contract, has been used, it is determined that the second identification information is correct. Otherwise, it is determined that the second identification information is incorrect, and the creation of the certificate NFT is terminated.

According to an exemplary embodiment of the present disclosure, it is possible to verify whether the creator of the certificate NFT is correct, that is, whether the creator of the certificate NFT is the NFT creator (ie, the creator of the target NFT) himself, thereby preventing forgery by non-NFT creators. Certificate NFT. This is why the creator of the target NFT and the creator of the certificate NFT should be the same person (i.e., the NFT creator), otherwise there may be a situation where a non-NFT creator forges the certificate NFT. According to an exemplary embodiment of the present disclosure, it can be verified by verifying (1) whether the certificate NFT creation account address is the account address of the current certificate NFT creator and (2) whether the certificate NFT creation account address is the account address of the NFT creator. Verify whether the NFT creator of the certificate is the NFT creator himself. If both of the above verifications are passed, it is determined that the creator of the certificate NFT is the NFT creator himself. Otherwise, it is determined that the creator of the certificate NFT is not the NFT creator himself, and the creation of the certificate NFT is terminated. Therefore, the correctness of the creator of the certificate NFT can be verified by verifying the correctness of the account address created by the certificate NFT and the consistency of the NFT creator's public key in the metadata of the certificate NFT and the address of the account created by the certificate NFT.

For example, it can be determined whether the account address of the certificate NFT creation account is the account address of the certificate NFT creator through asymmetric encryption (for example, the private key of the certificate NFT creation account is signed and the certificate creation contract public key is decrypted). For example, the certificate creation contract sends the predetermined information to the certificate NFT creation account. The certificate NFT creation account uses the private key to encrypt the signature of the predetermined information and sends the signature to the certificate creation contract. The certificate creation contract uses the public key to decrypt the signature and Verify whether the decrypted data is consistent with the predetermined information. If it is consistent, it is determined that the certificate NFT creation account address is the account address of the certificate NFT creator. If it is inconsistent or a signature is not received, it is determined that the certificate NFT creation account address is not the certificate NFT creator. account address. When it is determined that the certificate NFT creation account address is the account address of the certificate NFT creator, the NFT creator's account address is obtained based on the NFT creator's public key in the metadata of the certificate NFT, and the NFT creator's account address is combined with the certificate NFT creation Compare the account addresses; if the NFT creator's account address is consistent with the certificate NFT creation account address, it is determined that the creator of the certificate NFT is correct; otherwise, it is determined that the creator of the certificate NFT is wrong.

Of course, the present disclosure is not limited to the above-mentioned process of verifying the correctness of the metadata of the certificate NFT. Any possible method or data can also be used to verify the correctness of the metadata of the certificate NFT.

FIG. 6 is a flowchart illustrating a data verification method according to an exemplary embodiment of the present disclosure. After the target NFT with certificate NFT is created according to the data processing method shown in Figure 3 of the present disclosure, the user can verify the target NFT according to the data verification method shown in Figure 6 of the present disclosure to verify the authenticity of the target NFT. sex.

Referring to Figure 7, in step 601, the certificate verification contract can be called to verify the target NFT based on the metadata of the target NFT and the metadata of the certificate NFT associated with the target NFT; in step 602, the verification result can be output.

According to an exemplary embodiment of the present disclosure, the relevant information of the NFT creation contract can be input into the certificate verification contract, and through the certificate verification contract, based on the relevant information of the NFT creation contract, the metadata of the target NFT and the metadata of the certificate NFT can be obtained. Here, the information related to the NFT creation contract refers to the information related to the event that the NFT creation contract creates the target NFT. For example, the relevant information of the NFT creation contract may include, but is not limited to, the address of the NFT creation contract and the digital identification (for example, token ID) of the target NFT in the NFT creation contract. This disclosure does not limit the content of the relevant information of the NFT creation contract. For example, the relevant information of the NFT creation contract may also include identification information corresponding to the target NFT or identification information corresponding to the subject of the target NFT, etc., or these identification information may be used instead. Digital ID.

According to an exemplary embodiment of the present disclosure, the certificate verification contract can communicate with a third-party oracle (for example, Chainlink oracle network), and use the third-party oracle to create relevant information of the contract based on the NFT, from storing the target NFT Obtain the metadata of the target NFT from the metadata blockchain (e.g., IPFS, AR, etc.). Specifically, the certificate verification contract and the third-party oracle are in the same blockchain. The certificate verification contract can issue a metadata acquisition request containing relevant information of the NFT creation contract, and the third-party oracle obtains the metadata from the chain. Data acquisition please After requesting, the relevant information of the contract created based on the NFT obtains the metadata of the target NFT from the blockchain that stores the metadata of the target NFT (not in the same blockchain as the certificate verification contract and the third-party oracle), and will obtain the target NFT. The metadata of the NFT is published on the chain, and the certificate verification contract can obtain the metadata of the target NFT from the chain.

According to an exemplary embodiment of the present disclosure, a certificate verification contract may be used to communicate with a third-party oracle (for example, the Chainlink oracle network), and the third-party oracle may be used to obtain metadata from a block storing the metadata of the certificate NFT based on the second identification information. Chain gets the metadata of the certificate NFT. Specifically, the certificate verification contract and the third-party oracle are in the same blockchain. The certificate verification contract can issue a metadata acquisition request containing the second identification information, and the third-party oracle obtains the metadata from the chain. After the request, obtain the metadata of the certificate NFT from the blockchain that stores the metadata of the certificate NFT based on the second identification information (not on the same blockchain as the certificate verification contract and the third-party oracle), and store the metadata of the certificate NFT. The metadata is published on the chain, and the certificate verification contract can obtain the metadata of the certificate NFT from the chain.

According to an exemplary embodiment of the present disclosure, based on the relevant information of the NFT creation contract, the identification information corresponding to the metadata of the certificate NFT is obtained from the certificate creation contract, that is, the second identification information; and through a third-party oracle, based on the second Identification information, obtain the metadata of the certificate NFT from the blockchain (for example, IPFS, AR, etc.) that stores the metadata of the certificate NFT.

According to an exemplary embodiment of the present disclosure, at least one item of data in the metadata of the target NFT and at least one item of data in the metadata of the certificate NFT can be verified separately. If each item of verified data is correct, then it can be It is determined that the target NFT is authentic, that is, it can be determined that the target NFT was created or authorized to be created by the NFT creator of the transaction record on the target NFT metadata, and a verification result indicating that the target NFT is authentic is output. Once it is detected that an item of data is incorrect, it can be determined that the target NFT is forged by others, and a prompt indicating that the authenticity of the target NFT is at risk is output. This disclosure does not limit the order of the verification process for each piece of data. For example, validation can be performed on each piece of data simultaneously. For another example, each piece of data can be verified in sequence. As long as some data fails to pass the verification, the verification will be terminated and the verification result will be output. For another example, at least one piece of data in the metadata of the target NFT can be verified first, and if the verification passes, at least one piece of data in the metadata of the certificate NFT can be verified. For another example, at least one piece of data in the metadata of the certificate NFT can be verified first, and if the verification passes, at least one piece of data in the metadata of the target NFT can be verified.

According to an exemplary embodiment of the present disclosure, a first verification may be performed on the target NFT based on the metadata of the target NFT; if the first verification is passed, a second verification may be performed on the target NFT based on the metadata of the certificate NFT.

According to an exemplary embodiment of the present disclosure, the first verification may include separately verifying at least one item of data in the metadata of the target NFT. If the verification result of the at least one item of data is failed, outputting an indication that the target NFT The authenticity of the verification results is at risk.

For example, the data verified by the first verification may include, but is not limited to, at least one of the following items: the address of the certificate verification contract in the metadata of the target NFT and the NFT creator account address in the metadata of the target NFT. (1) When verifying the address of the certificate verification contract in the metadata of the target NFT, the consistency of the address of the certificate verification contract in the metadata of the target NFT with the address of the called certificate verification contract can be verified. If the address of the certificate verification contract in the metadata of the target NFT is consistent with the address of the called certificate verification contract, it means that the address of the certificate verification contract in the metadata of the target NFT is correct, then the address of the certificate verification contract in the metadata of the target NFT is correct. The verification result of the address is passed. If they are inconsistent, it means that the address of the certificate verification contract in the metadata of the target NFT is incorrect, and the verification result of the address of the certificate verification contract in the metadata of the target NFT is failed, and a verification that the authenticity of the target NFT is at risk is output. result. (2) When verifying the NFT creator’s account address in the metadata of the target NFT, it can be verified Verify the consistency of the NFT creator's account address in the metadata of the target NFT and the NFT creator's account address in the transaction record (i.e., the address pointed to by "to" in the creation record in the transaction record). If the NFT creator account address in the metadata of the target NFT is consistent with the NFT creator account address in the transaction record, it means that the NFT creator account address in the metadata of the target NFT is correct, then the NFT creator account address in the metadata of the target NFT is correct. The verification result of the personal account address is passed. If they are inconsistent, it means that the NFT creator account address in the metadata of the target NFT is incorrect, and the verification result of the NFT creator account address in the metadata of the target NFT is failed, and a verification that the authenticity of the target NFT is at risk is output. result. The first verification of the present disclosure is not limited to the above-mentioned verification process, and may also include verification processes for other data in the metadata of the target NFT as needed or set.

According to an exemplary embodiment of the present disclosure, the second verification may include separately verifying at least one item of data in the metadata of the certificate NFT. If the verification result of the at least one item of data is failed, then Output verification results indicating that the authenticity of the target NFT is at risk.

For example, the data verified by the second verification may include, but is not limited to, at least one of the following items: NFT creator public key, NFT creator signature, NFT creator signature expiration time, NFT target address, NFT creation contract The address and certificate verify the address of the contract. (1) When verifying the NFT creator's public key, you can obtain the NFT creator's account address based on the NFT creator's public key in the metadata of the certificate NFT, and verify that the obtained NFT creator's account address matches the address in the metadata of the target NFT. The consistency of the NFT creator's account address is used to determine whether the public key on the NFT certificate belongs to the NFT creator. Here, the hash value of the NFT creator's public key can be used to derive the NFT creator's account address. Therefore, the NFT creator's account address can be obtained by hashing the NFT creator's public key. If the obtained NFT creator account address is consistent with the NFT creator account address in the metadata of the target NFT, it means that the public key on the certificate NFT belongs to the NFT creator, then determine the NFT creator in the metadata of the certificate NFT. The verification result of the public key is passed. If they are inconsistent, it means that the public key on the certificate NFT does not belong to the NFT creator, then determine that the verification result of the NFT creator's public key in the metadata of the certificate NFT is failed, and output a verification that the authenticity of the target NFT is at risk. result. (2) When verifying the NFT creator's signature, use the NFT creator's public key in the metadata of the certificate NFT to decrypt the NFT creator's signature in the metadata of the certificate NFT, and verify the decrypted data and the certificate information data The consistency of other certificate information data except the signature of the NFT creator (for example, comparing the decrypted data with other certificate information data one by one) to verify whether the metadata of the certificate NFT has been authorized by the NFT creator of. If each item of data after decryption is consistent with the corresponding data in other certificate information data, it means that the metadata of the certificate NFT is authorized by the NFT creator, and the verification result of the NFT creator's signature in the metadata of the certificate NFT is pass. If they are inconsistent, it means that the metadata of the certificate NFT is not authorized by the NFT creator, and the verification result of the NFT creator's signature in the metadata of the certificate NFT is failed, and the verification result that the authenticity of the target NFT is at risk is output. (3) When verifying the expiration time of the NFT creator's signature, verify the matching of the NFT creator's signature expiration time in the metadata of the certificate NFT with the creation time or on-chain time of the target NFT to verify whether there is an expired creation. Condition. After the NFT creation contract completes the creation of the target NFT, the information related to the creation time or the uploading time is recorded on the blockchain. If the creation time or uploading time is within the expiration time of the NFT creator's signature, that is, both or match, it means that the target NFT was created within the valid time authorized by the NFT creator, so the creation of the target NFT was authorized by the NFT creator, then the verification result of the NFT creator's signature expiration time in the metadata of the certificate NFT is pass. If the creation time or on-chain time exceeds the expiration time of the NFT creator's signature, that is, the two do not match, it means that the target NFT was created outside the valid time authorized by the NFT creator, indicating that the target NFT was created by someone other than the NFT creator. authorized, the verification result of the NFT creator’s signature expiration time in the metadata of the certificate NFT is failed, and Output verification results indicating that the authenticity of the target NFT is at risk. (4) When verifying the NFT target address, verify the consistency of the NFT target address in the metadata of the certificate NFT and the NFT target address in the metadata of the target NFT to verify whether the NFT target corresponding to the certificate NFT is correct. If the NFT target address in the metadata of the certificate NFT is consistent with the NFT target address in the metadata of the target NFT, it means that the NFT target corresponding to the certificate NFT is correct, and the verification result of the NFT target address in the metadata of the certificate NFT is passed. If they are inconsistent, it means that the NFT target corresponding to the certificate NFT is incorrect, and the verification result of the NFT target address in the metadata of the certificate NFT is failed, and the verification result that the authenticity of the target NFT is at risk is output. (5) When verifying the NFT creation contract address, verify the consistency of the NFT creation contract address in the metadata of the certificate NFT and the NFT creation contract address in the metadata of the target NFT to verify whether the target NFT corresponding to the verification certificate NFT is made by NFT creation contract creation. If the NFT creation contract address in the metadata of the certificate NFT is consistent with the NFT creation contract address in the metadata of the target NFT, it means that the target NFT corresponding to the verification certificate NFT is created by the NFT creation contract, then the NFT in the metadata of the certificate NFT The verification result of creating the contract address is passed. If they are inconsistent, it means that the target NFT corresponding to the verification certificate NFT is not created by the NFT creation contract, and the verification result of the NFT creation contract address in the metadata of the certificate NFT is failed, and the verification result that the authenticity of the target NFT is at risk is output. (6) When verifying the address of the certificate verification contract, verify the consistency of the address of the certificate verification contract in the metadata of the certificate NFT and the address of the certificate verification contract in the metadata of the target NFT to verify whether the certificate NFT is generated by the target NFT The specified certificate verification contract is used for verification. If the address of the certificate verification contract in the metadata of the certificate NFT is consistent with the address of the certificate verification contract in the metadata of the target NFT, it means that the certificate NFT is verified by the certificate verification contract specified by the target NFT, then the metadata of the certificate NFT The verification result of the address of the certificate verification contract is passed. If they are inconsistent, it means that the certificate NFT is not verified by the certificate verification contract specified by the target NFT. The verification result of the address of the certificate verification contract in the metadata of the certificate NFT is failed, and a verification that the authenticity of the target NFT is at risk is output. result. The second verification of the present disclosure is not limited to the above-mentioned verification process. Part of the above-mentioned verification process can also be skipped according to needs or settings (for example, if the user passes in the address of the NFT target when initiating verification, verification (4) needs to be performed, otherwise verification may not be performed. (4)), or add a verification process for other data in the metadata of the certificate NFT.

According to the data processing method and data verification method of the present disclosure, the certificate NFT associated with the target NFT can be created based on the certificate information data associated with the target NFT through the certificate creation contract, and the certificate NFT associated with the target NFT can be utilized through the certificate verification contract. Verify the target NFT, that is, create an anti-counterfeiting certificate NFT for the target NFT through a pair of smart contracts (i.e., certificate creation contract and certificate verification contract), and verify the target NFT through the certificate NFT, thereby ensuring that the target NFT authenticity to prevent fraud like SleepMinting.

Below, an exemplary process of creating an NFT with a certificate and corresponding certificate verification after creation according to the present disclosure is described in detail with reference to FIGS. 7 and 8 .

7 is a flowchart illustrating a specific creation process of an NFT with a certificate according to an exemplary embodiment of the present disclosure.

Referring to Figure 7, in step 701, the NFT object (for example, digital files of pictures, videos, etc.) can be uploaded to the blockchain (such as, but not limited to, IPFS or AR, etc.) or cloud storage, etc., and the corresponding data of the NFT object can be obtained. token (can be called the first token).

In step 702, the certificate information data can be organized, uploaded to the blockchain (for example, but not limited to, IPFS or AR, etc.), and a token corresponding to the certificate information data (which can be called a second token) is obtained. Certificate information data may include, but is not limited to, at least one of the following items: NFT subject address, NFT creation contract address, certificate verification contract address, NFT creator account address, NFT creator public key, NFT creator signature and NFT creator Signature expiration time.

In addition, the present disclosure does not limit the execution order of steps 701 and 702. For example, step 701 may be executed first and then step 702, or step 702 may be executed first and then step 701, or both may be executed simultaneously.

In step 703, the metadata of the target NFT can be organized, uploaded to the blockchain (for example, but not limited to, IPFS or AR, etc.), and a token corresponding to the metadata of the target NFT (which can be called third token). Here, the metadata of the target NFT may include, but is not limited to, descriptive information related to the NFT object, the first token, the second token, and the address of the certificate verification contract used to verify the target NFT (the address of the certificate verification contract) .

In step 704, the obtained third token can be passed into the NFT creation contract in the blockchain (for example, but not limited to, Ethereum, etc.), and the NFT creation contract generates the corresponding token (which can be called the fourth token) based on the third token. token). The fourth token is the target NFT, that is, the target NFT is created. After the target NFT is created, it can be deposited into the NFT creator's account. In addition, when the target NFT is created, the token ID of the target NFT in the NFT creation contract can also be obtained.

In step 705, the metadata of the certificate NFT can be organized and uploaded to the blockchain (for example, but not limited to, IPFS or AR, etc.) to obtain the token corresponding to the metadata of the certificate NFT (which can be called fifth token). Here, the metadata of the certificate NFT can include, but is not limited to, the NFT creation contract address, token ID, and certificate information data.

In step 706, the obtained fifth token is passed into the certificate creation contract in the blockchain, and the certificate creation contract verifies the correctness of the metadata of the certificate NFT. For example, the certificate creation contract can verify the correctness of the metadata of the certificate NFT from, but not limited to, the following aspects: (1) Verify whether the address of the certificate verification contract in the metadata of the certificate NFT is correct to prevent certificate errors Certificates created and created cannot be verified. (2) Verify whether the token corresponding to the metadata of the certificate NFT (ie, the fifth token) has been used in the certificate creation contract to prevent one certificate from corresponding to multiple target NFTs. (3) Verify whether the creator of the certificate NFT is the NFT creator to prevent non-NFT creators from forging the certificate NFT. Once one piece of data verification fails, in step 707, the creation of the certificate NFT is terminated.

In step 708, after verifying that the metadata of the certificate NFT is correct, the certificate creation contract generates the corresponding token based on the fifth token (which can be called the sixth token). The sixth token is the certificate NFT, that is, the creation of the certificate NFT is completed. After the certificate NFT is created, it can be deposited into the NFT creator's account.

FIG. 8 is a flowchart illustrating a specific verification process of an NFT with a certificate according to an exemplary embodiment of the present disclosure.

Referring to Figure 8, in step 801, the certificate verification contract can be called through the client (for example, browser, application, etc.) using web3.js, and the NFT creation contract address and the token ID of the target NFT in the NFT creation contract can be entered into the certificate verification contract.

In step 802, the certificate verification contract can pass the Chainlink third-party oracle, based on the NFT creation contract address and the token ID of the target NFT in the NFT creation contract from the blockchain that stores the metadata of the target NFT (for example, IPFS or AR, etc.) , read the metadata of the target NFT.

In step 803, the certificate verification contract can obtain the token corresponding to the metadata of the certificate NFT from the certificate creation contract (ie, the fifth token in Figure 7) based on the NFT creation contract address and the token ID of the target NFT in the NFT creation contract. , and through the Chainlink third-party oracle, based on the token, read the metadata of the certificate NFT from the blockchain (for example, IPFS or AR, etc.) that stores the metadata of the certificate NFT. This disclosure does not limit the execution order of steps 802 and 803. For example, they may be executed at the same time. For example, step 802 may be executed first and then step 803. For example, step 803 may be executed first and then step 802.

At step 804, the certificate verification contract may perform verification on the metadata of the target NFT. For example, but not limited to, verification can be performed separately on the address of the certificate verification contract and the address of the NFT creator's account in the metadata of the target NFT. Once one data verification fails, in step 805, a verification result indicating that the target NFT has a fraud risk is output.

In step 806, if the verification of the metadata of the certificate NFT passes, the certificate verification contract may perform verification of the metadata of the certificate NFT. For example, but not limited to, the NFT target address, NFT creation contract address, certificate verification contract address, NFT creator account address, NFT creator public key, NFT creator signature and NFT creation in the metadata of the certificate NFT can be processed separately. The expiration time of the person's signature is verified separately. Once one data verification fails, in step 805, a verification result indicating that the target NFT has a fraud risk is output.

In step 807, if the verification of the metadata of the certificate NFT passes, a verification result indicating that the target NFT is authentic is output.

FIG. 9 is a block diagram illustrating a data processing apparatus according to an exemplary embodiment of the present disclosure.

Referring to FIG. 9 , a data processing apparatus 900 according to an exemplary embodiment of the present disclosure may include a first identification information acquisition unit 901, a target NFT creation unit 902, a second identification information acquisition unit 903, and a certificate NFT creation unit 904.

The first identification information obtaining unit 901 may obtain the first identification information corresponding to the metadata of the target NFT. Here, the target NFT may refer to the NFT created by the NFT creator for its NFT object (for example, digital files of pictures, videos, etc.).

According to an exemplary embodiment of the present disclosure, in order to generate a target NFT with a certificate, the metadata of the target NFT needs to include at least data for verifying the target NFT. For example, the metadata of the target NFT may also include, but is not limited to, identification information corresponding to the certificate information data associated with the target NFT, and the address of the certificate verification contract used to verify the target NFT. Here, the certificate information data may include data used by the certificate verification contract to verify the target NFT. The identification information corresponding to the certificate information data may be the identification information obtained after the certificate information data is stored in the blockchain, and is used to indicate the storage address of the certificate information data. The address of the certificate verification contract refers to the storage address of the certificate verification contract in the blockchain.

According to an exemplary embodiment of the present disclosure, the certificate information data may include, but is not limited to, at least one of the following items: NFT target address, NFT creation contract address, certificate verification contract address, NFT creator account address, NFT creation The person’s public key, NFT creator’s signature, and NFT creator’s signature expiration time. Of course, the certificate information data of this disclosure is not limited to the above data, and may include other certificate information data that you wish to verify as needed, for subsequent use by the certificate verification contract to verify the target NFT.

The target NFT creation unit 902 may call the NFT creation contract to create the target NFT based on the first identification information. Specifically, the target NFT creation unit 902 can generate identification information (for example, token) for identifying the first identification information through the NFT creation contract, and the generated identification information is the target NFT. After the creation of the target NFT is completed, the target NFT creation unit 902 can deposit the target NFT into the NFT creator's account through the NFT creation contract.

The second identification information obtaining unit 903 may obtain the second identification information corresponding to the metadata of the certificate NFT related to the target NFT. Here, in order to enable the certificate NFT to be used to verify the target NFT, the metadata of the certificate NFT may include information related to the NFT creation contract and certificate information data. The information related to the NFT creation contract refers to the information related to the NFT Create contract to create event-related information of the target NFT. The second identification information corresponding to the metadata of the certificate NFT may be identification information obtained after the metadata of the certificate NFT is stored in the blockchain, and is used to indicate the storage address of the metadata of the certificate NFT.

According to an exemplary embodiment of the present disclosure, the relevant information of the NFT creation contract may include, but is not limited to, the address of the NFT creation contract and the digital identification (for example, token ID) of the target NFT in the NFT creation contract. Of course, the relevant information of the NFT creation contract is not limited to this. For example, the relevant information of the NFT creation contract may not include the digital identification of the target NFT in the NFT creation contract, but include the identification information (token) of the target NFT, that is, the target NFT itself. token value, etc.

The certificate NFT creation unit 904 may call a certificate creation contract to create a certificate NFT based on the second identification information, where the certificate creation contract is a contract corresponding to the certificate verification contract. Specifically, the certificate NFT creation unit 904 can generate identification information (for example, token) for identifying the second identification information through the certificate creation contract, and the generated identification information is the certificate NFT. After the creation of the certificate NFT is completed, the certificate NFT creation unit 904 can deposit the certificate NFT into the NFT creator's account through the certificate creation contract.

According to an exemplary embodiment of the present disclosure, the certificate NFT creation unit 904 can first verify the metadata of the certificate NFT before creating the certificate NFT through the certificate creation contract. After the metadata of the certificate NFT is verified to be correct, the third certificate NFT can be used. Use the second identification information to create a certificate NFT, thereby ensuring that the created certificate NFT is indeed the certificate NFT of the target NFT.

According to an exemplary embodiment of the present disclosure, the certificate NFT creation unit 904 may verify at least one piece of data related to the metadata of the certificate NFT, and if each item of data is verified to be correct, then the certificate NFT The metadata is verified to be correct, thus starting the creation of the certificate NFT. Once the verified data is incorrect, the creation of the certificate NFT will be terminated. For example, the certificate NFT creation unit 904 may verify at least one of the address of the certificate verification contract, the second identification information, and the certificate NFT creator. According to an exemplary embodiment of the present disclosure, the certificate NFT creation unit 904 may verify whether the address of the certificate verification contract in the metadata of the certificate NFT is correct, thereby preventing the certificate NFT from being created incorrectly or the created certificate NFT from being unavailable for verification. This is because if the address of the certificate verification contract in the metadata of the certificate NFT is incorrect, it means that the certificate verification contract does not correspond to the certificate creation contract that created the certificate NFT, which will cause the certificate NFT to be incorrectly created or the certificate NFT after creation cannot for verification. The address of the certificate verification contract in the metadata of the certificate NFT can be obtained by querying the blockchain that stores the metadata of the certificate NFT based on the second identification information corresponding to the metadata of the certificate NFT through a third-party oracle. After obtaining the address of the certificate verification contract in the metadata of the certificate NFT, the correctness of the address of the certificate verification contract in the metadata of the certificate NFT can be verified based on the address of the actual certificate verification contract. Since the certificate creation contract and the certificate verification contract are a pair of contracts, the certificate creation contract can determine the address of the actual certificate verification contract, that is, the address of the actual certificate verification contract is determined by the address of the certificate creation contract. For example, if the address of the certificate verification contract in the metadata of the certificate NFT is consistent with the address of the actual certificate verification contract, it is determined that the address of the certificate verification contract in the metadata of the certificate NFT is correct. Otherwise, it is determined that the address of the certificate verification contract in the metadata of the certificate NFT is wrong, and the creation of the certificate NFT is terminated.

According to an exemplary embodiment of the present disclosure, the certificate NFT creation unit 404 can verify whether the second identity corresponding to the metadata of the certificate NFT has been used in the certificate creation contract, thereby preventing one certificate NFT from corresponding to multiple NFT objects. This is because if the second identification information has been used in the certificate creation contract, it means that the certificate NFT has already corresponded to other NFT objects, which will cause the certificate NFT to correspond to multiple NFT objects and lose verification reliability. In other words, the metadata of the certificate NFT should correspond to a unique identification information, so it can be recorded in the creation record of the certificate creation contract. Query whether the second identification information has been used in the creation of the certificate creation contract before. If it is determined that the second identification information has not been used, it is determined that the second identification information is correct. Otherwise, it is determined that the second identification information is incorrect, and the creation of the certificate NFT is terminated.

According to an exemplary embodiment of the present disclosure, the certificate NFT creation unit 904 may verify whether the certificate NFT creator is correct, that is, verify whether the certificate NFT creator is the NFT creator (ie, the creator of the target NFT) himself, thereby preventing non-NFT Create a fake certificate NFT. This is why the creator of the target NFT and the creator of the certificate NFT should be the same person (i.e., the NFT creator), otherwise there may be a situation where a non-NFT creator forges the certificate NFT. According to an exemplary embodiment of the present disclosure, the certificate NFT creation unit 904 can verify (1) whether the certificate NFT creation account address is the account address of the current certificate NFT creator and (2) whether the certificate NFT creation account address is the NFT creator's account address. Account address to verify whether the NFT creator of the certificate is the NFT creator himself. If both of the above verifications are passed, it is determined that the creator of the certificate NFT is the NFT creator himself. Otherwise, it is determined that the creator of the certificate NFT is not the NFT creator himself, and the creation of the certificate NFT is terminated. Therefore, the correctness of the creator of the certificate NFT can be verified by verifying the correctness of the account address created by the certificate NFT and the consistency of the NFT creator's public key in the metadata of the certificate NFT and the address of the account created by the certificate NFT.

For example, it can be determined whether the account address of the certificate NFT creation account is the account address of the certificate NFT creator through asymmetric encryption (for example, the private key of the certificate NFT creation account is signed and the certificate creation contract public key is decrypted). When it is determined that the certificate NFT creation account address is the account address of the certificate NFT creator, the NFT creator account address is derived based on the NFT creator's public key in the metadata of the certificate NFT, and the derived NFT creator account address is verified. Consistency with the account address created by the certificate NFT; when it is determined that the deduced NFT creator account address is consistent with the account address created by the certificate NFT, it is determined that the creator of the certificate NFT is correct; otherwise, it is determined that the creator of the certificate NFT is wrong.

FIG. 10 is a block diagram illustrating a data verification device according to an exemplary embodiment of the present disclosure.

Referring to FIG. 10 , a data verification device 1000 according to an exemplary embodiment of the present disclosure may include a target NFT verification unit 1001 and a verification result output unit 1002.

The target NFT verification unit 1001 may call the certificate verification contract to verify the target NFT based on the metadata of the target NFT and the metadata of the certificate NFT associated with the target NFT. The verification result output unit 1002 may output the verification result.

According to an exemplary embodiment of the present disclosure, the target NFT verification unit 1001 can input the relevant information of the NFT creation contract into the certificate verification contract, and obtain the metadata and certificate NFT of the target NFT based on the relevant information of the NFT creation contract through the certificate verification contract. metadata. Here, the information related to the NFT creation contract refers to the information related to the event that the NFT creation contract creates the target NFT. For example, the relevant information of the NFT creation contract may include, but is not limited to, the address of the NFT creation contract and the digital identification (for example, token ID) of the target NFT in the NFT creation contract. This disclosure does not limit the content of the relevant information of the NFT creation contract. For example, the relevant information of the NFT creation contract may also include identification information corresponding to the target NFT or identification information corresponding to the subject of the target NFT, etc., or these identification information may be used instead. Digital ID. According to an exemplary embodiment of the present disclosure, the target NFT verification unit 1001 can communicate with a third-party oracle (for example, Chainlink oracle network) through a certificate verification contract, and use the third-party oracle to create relevant information of the contract based on the NFT, from storing the target The blockchain of the NFT's metadata (e.g., IPFS, AR, etc.) obtains the metadata of the target NFT. The target NFT verification unit 1001 can verify the contract with a third party through the certificate verification contract. The third-party oracle communicates with the oracle (for example, the Chainlink oracle network), and uses a third-party oracle to obtain the metadata of the certificate NFT from the blockchain that stores the metadata of the certificate NFT based on the second identification information.

According to an exemplary embodiment of the present disclosure, the target NFT verification unit 1001 can obtain the identification information corresponding to the metadata of the certificate NFT from the certificate creation contract, that is, the second identification information, based on the relevant information of the NFT creation contract; and through a third party The oracle, based on the second identification information, obtains the metadata of the certificate NFT from the blockchain (for example, IPFS, AR, etc.) that stores the metadata of the certificate NFT.

According to an exemplary embodiment of the present disclosure, the target NFT verification unit 1001 may separately verify at least one item of data in the metadata of the target NFT and at least one item of data in the metadata of the certificate NFT. Each item of data that has been verified are correct, then it can be determined that the target NFT is authentic, that is, it can be determined that the target NFT is created or authorized to be created by the NFT creator of the transaction record on the target NFT metadata, and the verification result output unit 1102 can output an indication indicating that the target NFT is authentic. Validation results. Once it is detected that an item of data is incorrect, the target NFT verification unit 1101 may determine that the target NFT is forged by others, and the verification result output unit 1102 may output a prompt indicating that the authenticity of the target NFT is at risk.

According to an exemplary embodiment of the present disclosure, the target NFT verification unit 1001 may perform a first verification on the target NFT based on the metadata of the target NFT; if the first verification is passed, perform a second verification on the target NFT based on the metadata of the certificate NFT. verify.

According to an exemplary embodiment of the present disclosure, the first verification performed by the target NFT verification unit 1001 may include separately verifying at least one item of data in the metadata of the target NFT, if any of the verification results of the at least one item of data is incorrect. Pass, the verification result output unit 1002 outputs a verification result indicating that the authenticity of the target NFT is at risk.

For example, the data verified by the first verification performed by the target NFT verification unit 1001 may include, but is not limited to, at least one of the following items: the address of the certificate verification contract in the metadata of the target NFT and the metadata of the target NFT. The NFT creator’s account address. (1) The target NFT verification unit 1001 verifies the consistency of the address of the certificate verification contract in the metadata of the target NFT and the address of the called certificate verification contract. If the address of the certificate verification contract in the metadata of the target NFT is consistent with the address of the called certificate verification contract, it means that the address of the certificate verification contract in the metadata of the target NFT is correct, then the address of the certificate verification contract in the metadata of the target NFT is correct. The verification result of the address is passed. If they are inconsistent, it means that the address of the certificate verification contract in the metadata of the target NFT is incorrect, and the verification result of the address of the certificate verification contract in the metadata of the target NFT is failed, and the verification result output unit 1002 outputs the true address of the target NFT. Verification results of sexual risks. (2) The target NFT verification unit 1001 verifies the difference between the NFT creator account address in the metadata of the target NFT and the NFT creator account address in the transaction record (that is, the address pointed to by "to" in the creation record in the transaction record). consistency. If the NFT creator account address in the metadata of the target NFT is consistent with the NFT creator account address in the transaction record, it means that the NFT creator account address in the metadata of the target NFT is correct, then the NFT creator account address in the metadata of the target NFT is correct. The verification result of the personal account address is passed. If they are inconsistent, it means that the NFT creator account address in the metadata of the target NFT is incorrect, and the verification result of the NFT creator account address in the metadata of the target NFT is failed, and the verification result output unit 1002 outputs the true identity of the target NFT. Verification results of sexual risks. The first verification of the present disclosure is not limited to the above-mentioned verification process, and may also include verification processes for other data in the metadata of the target NFT as needed or set.

According to an exemplary embodiment of the present disclosure, the second verification performed by the target NFT verification unit 1001 may include separately verifying at least one item of data in the metadata of the certificate NFT. If one of the verification results of the at least one item of data is The verification result is failed, and the verification result output unit 1002 outputs a verification indicating that the authenticity of the target NFT is at risk. Verify the results.

For example, the data verified by the second verification performed by the target NFT verification unit 1001 may include, but is not limited to, at least one of the following items: NFT creator public key, NFT creator signature, NFT creator signature expiration time, NFT target address, NFT creation contract address and certificate verification contract address. (1) The target NFT verification unit 1001 obtains the NFT creator's account address based on the NFT creator's public key in the metadata of the certificate NFT, and verifies the obtained NFT creator's account address and the NFT creator's account address in the metadata of the target NFT. consistency to determine whether the public key on the certificate NFT belongs to the NFT creator. Here, the hash value of the NFT creator's public key can be used to derive the NFT creator's account address. Therefore, the NFT creator's account address can be obtained by hashing the NFT creator's public key. If the obtained NFT creator account address is consistent with the NFT creator account address in the metadata of the target NFT, it means that the public key on the certificate NFT belongs to the NFT creator, then determine the NFT creator in the metadata of the certificate NFT. The verification result of the public key is passed. If they are inconsistent, it means that the public key on the certificate NFT does not belong to the NFT creator, then it is determined that the verification result of the NFT creator's public key in the metadata of the certificate NFT is failed, and the verification result output unit 1002 outputs the authenticity of the target NFT. Risky verification results. (2) The target NFT verification unit 1001 uses the NFT creator's public key in the metadata of the certificate NFT to decrypt the NFT creator's signature in the metadata of the certificate NFT, and verifies that the decrypted data is the same as the certificate information except the NFT. The consistency of other certificate information data other than the creator's signature (for example, comparing the decrypted data with other certificate information data one by one) to verify whether the metadata of the certificate NFT is authorized by the NFT creator. If each item of data after decryption is consistent with the corresponding data in other certificate information data, it means that the metadata of the certificate NFT is authorized by the NFT creator, and the verification result of the NFT creator's signature in the metadata of the certificate NFT is pass. If it is inconsistent, otherwise, it means that the metadata of the certificate NFT is not authorized by the NFT creator, then the verification result of the NFT creator's signature in the metadata of the certificate NFT is failed, and the verification result output unit 1002 outputs the authenticity of the target NFT. Risk verification results. (3) The target NFT verification unit 1001 verifies the match between the expiration time of the NFT creator's signature in the metadata of the certificate NFT and the creation time or on-chain time of the target NFT to verify whether there is an expired creation. After the NFT creation contract completes the creation of the target NFT, the information related to the creation time or the uploading time is recorded on the blockchain. If the creation time or uploading time is within the expiration time of the NFT creator's signature, that is, both If they match, it means that the target NFT was created within the validity period authorized by the NFT creator. Therefore, the creation of the target NFT was authorized by the NFT creator and the verification passed. If the creation time or on-chain time exceeds the expiration time of the NFT creator's signature, that is, the two do not match, it means that the target NFT was created outside the valid time authorized by the NFT creator, so the target NFT was not created by the NFT creator. authorized, then the verification result of the NFT creator's signature expiration time in the metadata of the certificate NFT is failed, and the verification result output unit 1002 outputs the verification result that the authenticity of the target NFT is at risk. (4) The target NFT verification unit 1001 verifies the consistency of the NFT target address in the metadata of the certificate NFT and the NFT target address in the metadata of the target NFT to verify whether the NFT target corresponding to the certificate NFT is correct. If the NFT target address in the metadata of the certificate NFT is consistent with the NFT target address in the metadata of the target NFT, it means that the NFT target corresponding to the certificate NFT is correct, and the verification result of the NFT target address in the metadata of the certificate NFT is passed. If they are inconsistent, it means that the NFT target corresponding to the certificate NFT is incorrect, and the verification result of the NFT target address in the metadata of the certificate NFT is failed, and the verification result output unit 1002 outputs the verification result that the authenticity of the target NFT is at risk. (5) The target NFT verification unit 1001 verifies the consistency of the NFT creation contract address in the metadata of the certificate NFT and the NFT creation contract address in the metadata of the target NFT to verify whether the target NFT corresponding to the verification certificate NFT is created by the NFT contract. create. If the NFT creation contract address in the metadata of the certificate NFT is the same as the metadata of the target NFT The NFT creation contract addresses in are consistent, indicating that the target NFT corresponding to the verification certificate NFT is created by the NFT creation contract, and the verification result of the NFT creation contract address in the metadata of the certificate NFT is passed. If they are inconsistent, it means that the target NFT corresponding to the verification certificate NFT is not created by the NFT creation contract, and the verification result of the NFT creation contract address in the metadata of the certificate NFT is failed, and the verification result output unit 1002 outputs the authenticity of the target NFT. Risk verification results. (6) The target NFT verification unit 1001 verifies the consistency of the address of the certificate verification contract in the metadata of the certificate NFT and the address of the certificate verification contract in the metadata of the target NFT to verify whether the certificate NFT is verified by the certificate specified by the target NFT. contract for verification. If the address of the certificate verification contract in the metadata of the certificate NFT is consistent with the address of the certificate verification contract in the metadata of the target NFT, it means that the certificate NFT is verified by the certificate verification contract specified by the target NFT, then the metadata of the certificate NFT The verification result of the address of the certificate verification contract is passed. If they are inconsistent, it means that the certificate NFT is not verified by the certificate verification contract specified by the target NFT. The verification result of the address of the certificate verification contract in the metadata of the certificate NFT is failed, and the verification result output unit 1002 outputs the authenticity of the target NFT. Risky verification results. The first verification of the present disclosure is not limited to the above-mentioned verification process. Part of the above-mentioned verification process can also be skipped according to needs or settings (for example, if the user passes in the address of the NFT target when initiating verification, verification (4) needs to be performed, otherwise verification may not be performed. (4)), or add a verification process for other data in the metadata of the certificate NFT.

Referring to Figure 11, the electronic device 11 includes at least one memory 1101 and at least one processor 1102. A set of computer-executable instructions is stored in the at least one memory 1101. When the set of computer-executable instructions is executed by the at least one processor 1102, execution Data processing method and data verification method according to exemplary embodiments of the present disclosure.

As an example, the electronic device 1100 may be a PC computer, a tablet device, a personal digital assistant, a smartphone, or other device capable of executing the above set of instructions. Here, the electronic device 1100 does not have to be a single electronic device, but can also be any collection of devices or circuits that can execute the above instructions (or instruction set) individually or jointly. Electronic device 1100 may also be part of an integrated control system or system manager, or may be configured as a portable electronic device that interfaces locally or remotely (eg, via wireless transmission).

In the electronic device 1100, the processor 1102 may include a central processing unit (CPU), a graphics processing unit (GPU), a programmable logic device, a dedicated processor system, a microcontroller or a microprocessor . By way of example and not limitation, processors may also include analog processors, digital processors, microprocessors, multi-core processors, processor arrays, network processors, and the like.

Processor 1102 may execute instructions or code stored in memory 1101 , where memory 1101 may also store data. Instructions and data may also be sent and received over the network via network interface devices, which may employ any known transport protocol.

The memory 1101 can be integrated with the processor 1102, for example, random access memory (Random Access Memory, RAM) or flash memory is arranged in an integrated circuit microprocessor or the like. Additionally, memory 1101 may include a stand-alone device, such as an external disk drive, storage array, or any other storage device that may be used by a database system. Memory 1101 and processor 1102 may be operatively coupled or may communicate with each other, such as through an I/O port, a network connection, or the like, enabling processor 1102 to read files stored in memory.

Additionally, electronic device 1100 may also include a video display (such as a liquid crystal display) and a user interaction interface (such as a keyboard, mouse, touch input device, etc.). All components of electronic device 1100 may be connected to each other via buses and/or networks.

According to an exemplary embodiment of the present disclosure, a computer-readable storage medium storing instructions may also be provided, wherein when the instructions are executed by at least one processor, the at least one processor is caused to perform the data processing method and data according to the present disclosure. Authentication method. Examples of computer-readable storage media here include: Non-volatile memory (ROM), Random Access Programmable ROM (PROM), Electrically Erasable Programmable Read-Only Memory (Electrically Erasable ROM, EEPROM), RAM, Dynamic RAM (DRAM), Static RAM (SRAM), Flash memory, non-volatile memory, Compact Disc ROM (CD-ROM) ), CD-R, CD+R, CD-RW, CD+RW, Digital Video Disk (DVD-ROM), DVD-R, DVD+R, DVD-RW, DVD+RW, DVD-RAM , Blu-ray Disc ROM (BD-ROM), BD-R, BD-R LTH (Blue-ray low to high), BD-RE (Blue-ray Re-Erasable), Blu-ray or optical disc memory , Hard Disk Drive (HDD), Solid State Drive (SSD), card storage (such as multimedia card, Secure Digital (SD) card or Extreme Digital (XD) card), magnetic tape, Floppy disks, magneto-optical data storage devices, optical data storage devices, hard disks, solid state disks, and any other device configured to store a computer program and any associated data, data files and data structures in a non-transitory manner and providing the computer program and any associated data, data files and data structures to the processor or computer so that the processor or computer can execute the computer program. The computer program in the above computer-readable storage medium can run in an environment deployed in computer equipment such as a client, a host, a proxy device, a server, etc. In addition, in one example, the computer program and any associated data, data files and data structures are distributed over networked computer systems such that computer programs and any associated data, data files and data structures are stored, accessed and executed in a distributed fashion by one or more processors or computers.

According to an exemplary embodiment of the present disclosure, a computer program product may also be provided, and instructions in the computer program product may be executed by a processor of a computer device to complete the data processing method and the data verification method according to the exemplary embodiment of the present disclosure. .

According to an exemplary embodiment of the present disclosure, a computer program may also be provided, and the computer program may be executed by a processor of a computer device to implement the data processing method and the data verification method according to the exemplary embodiment of the present disclosure.

According to the data processing method and data verification method of this disclosure, an anti-counterfeiting certificate NFT can be created for the target NFT through a pair of smart contracts, and the certificate NFT can be used to verify the authenticity of the target NFT to ensure the authenticity of the NFT creation process. Prevent fraud like SleepMinting and protect the rights and interests of NFT creators and NFT collectors.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the technical solutions disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common common sense or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the disclosure is limited only by the appended claims.

Claims

A data processing method including:

Obtain the first identification information corresponding to the metadata of the target NFT. The first identification information is the identification information obtained after the metadata of the target NFT is stored in the blockchain, where the metadata of the target NFT includes information related to the target NFT. The identification information corresponding to the certificate information data associated with the target NFT and the address of the certificate verification contract used to verify the target NFT. The identification information corresponding to the certificate information data is the certificate information data stored in the blockchain. The identification information obtained later;

Call the NFT creation contract to create the target NFT based on the first identification information;

Obtain the second identification information corresponding to the metadata of the certificate NFT to be created associated with the target NFT, wherein the metadata of the certificate NFT includes relevant information of the NFT creation contract and the certificate information data, and the third The second identification information is the identification information obtained after the metadata of the certificate NFT is stored in the blockchain;

A certificate creation contract is called to create the certificate NFT based on the second identification information, where the certificate creation contract corresponds to the certificate verification contract.
The method of claim 1, wherein the certificate information data includes data used by the certificate verification contract to verify the target NFT.
The method of claim 2, wherein the certificate information data includes at least one of the following items: the address of the NFT target, the address of the NFT creation contract, the address of the certificate verification contract, and the NFT creator account address. , NFT creator’s public key, NFT creator’s signature, and NFT creator’s signature expiration time.
The method of claim 1, wherein the relevant information of the NFT creation contract includes the address of the NFT creation contract and the digital identification of the target NFT in the NFT creation contract.
The method of claim 1, wherein before creating the certificate NFT based on the second identification information, the method further includes:

Verify the metadata of the certificate NFT;

Wherein, creating the certificate NFT based on the second identification information includes:

When the metadata of the certificate NFT is verified to be correct, the certificate NFT is created based on the second identification information.
The method of claim 5, wherein the verifying the metadata of the certificate NFT includes:

Verify at least one piece of data related to the metadata of the certificate NFT;

When every piece of data is verified to be correct, the metadata of the certificate NFT is verified to be correct;

Wherein, the at least one piece of data includes at least one of the following items: the address of the certificate verification contract, the second identification information and the creator of the certificate NFT.
The method of claim 6, wherein,

In the case where the at least one piece of data includes the address of the certificate verification contract, the verification of the metadata of the certificate NFT includes:

When the address of the certificate verification contract is consistent with the address of the actual certificate verification contract, it is determined that the address of the certificate verification contract in the metadata of the certificate NFT is correct, wherein the address of the actual certificate verification contract passes through The address of the certificate creation contract is determined;

Wherein, in the case where the at least one item of data includes the second identification information, the pair of certificates The NFT’s metadata is verified, including:

Determine whether the second identification information has been used in the certificate creation contract;

If the second identification information has not been used in the certificate creation contract, determine that the second identification information is correct;

Wherein, in the case where the at least one piece of data includes the creator of the certificate NFT, the verification of the metadata of the certificate NFT includes:

Determine whether the account address created by the certificate NFT is the account address of the creator of the certificate NFT through the signature of the private key of the certificate NFT creation account and the decryption of the public key of the certificate creation contract;

When it is determined that the certificate NFT creation account address is the account address of the certificate NFT creator, the NFT creator account address is obtained based on the NFT creator's public key in the metadata of the certificate NFT, and the Compare the NFT creator’s account address with the NFT creation account address of the certificate;

When the NFT creator's account address is consistent with the certificate NFT creation account address, it is determined that the certificate NFT creator is correct.
The method of claim 1, comprising:

Calling a certificate verification contract to verify the target NFT based on the metadata of the target NFT and the metadata of the certificate NFT associated with the target NFT;

Output the verification results.
The method of claim 8, wherein the verifying the target NFT based on metadata of the target NFT and metadata of the certificate NFT associated with the target NFT includes:

Perform a first verification on the target NFT based on the metadata of the target NFT;

If the first verification passes, a second verification is performed on the target NFT based on the metadata of the certificate NFT.
The method of claim 9, wherein the first verification includes:

Verify at least one piece of data in the metadata of the target NFT respectively;

Among them, the output verification results include:

If the verification result of one of the at least one data is failed, a verification result indicating that the authenticity of the target NFT is at risk is output.
The method of claim 10, wherein the at least one piece of data includes an address of a certificate verification contract in the metadata of the target NFT and an NFT creator account address in the metadata of the target NFT, and Verify at least one piece of data in the metadata of the target NFT, including:

If the address of the certificate verification contract in the metadata of the target NFT is consistent with the address of the called certificate verification contract, then the verification result of the address of the certificate verification contract in the metadata of the target NFT is passed;

If the NFT creator account address in the metadata of the target NFT is consistent with the NFT creator account address in the transaction record, the verification result of the NFT creator account address in the metadata of the target NFT is passed.
The method of any one of claims 9 to 11, wherein the second verification includes:

Verify at least one piece of data in the metadata of the certificate NFT respectively;

Among them, the output verification results include:

If the verification result of one piece of data among the verification results of the at least one piece of data is failed, the output instruction The authenticity of the target NFT is at risk.
The method of claim 12, wherein the at least one piece of data includes the NFT creator's public key, the NFT creator's signature, the NFT creator's signature expiration time, and the NFT target address in the metadata of the certificate NFT. The address of the NFT creation contract and the address of the certificate verification contract are verified separately at least one piece of data in the metadata of the certificate NFT, including:

The NFT creator's account address is obtained based on the NFT creator's public key in the metadata of the certificate NFT. If the obtained NFT creator's account address is consistent with the NFT creator's account address in the metadata of the target NFT, then the The verification result of the NFT creator’s public key in the metadata of the certificate NFT is passed;

Use the NFT creator's public key in the metadata of the certificate NFT to decrypt the NFT creator's signature in the metadata of the certificate NFT. If the data obtained after decryption is different from the NFT creator in the certificate information data, If other certificate information data except the person's signature are consistent, then the verification result of the NFT creator's signature in the metadata of the certificate NFT is passed;

If the expiration time of the NFT creator's signature in the metadata of the certificate NFT matches the creation time or on-chain time of the target NFT, then verify the expiration time of the NFT creator's signature in the metadata of the certificate NFT. The result is passed;

If the NFT target address in the metadata of the certificate NFT is consistent with the NFT target address in the metadata of the target NFT, then the verification result of the NFT target address in the metadata of the certificate NFT is passed;

If the NFT creation contract address in the metadata of the certificate NFT is consistent with the NFT creation contract address in the metadata of the target NFT, then the verification result of the NFT creation contract address in the metadata of the certificate NFT is passed;

If the address of the certificate verification contract in the metadata of the certificate NFT is consistent with the address of the certificate verification contract in the metadata of the target NFT, then the verification result of the address of the certificate verification contract in the metadata of the certificate NFT is for passing.
A data processing device including:

The first identification information acquisition unit is configured to obtain the first identification information corresponding to the metadata of the target NFT, where the first identification information is the identification information obtained after the metadata of the target NFT is stored in the blockchain, wherein, The metadata of the target NFT includes identification information corresponding to the certificate information data associated with the target NFT, and the address of the certificate verification contract used to verify the target NFT. The identification information corresponding to the certificate information data is The identification information obtained after the certificate information data is stored in the blockchain;

A target NFT creation unit configured to call an NFT creation contract to create the target NFT based on the first identification information;

The second identification information acquisition unit is configured to obtain the second identification information corresponding to the metadata of the certificate NFT to be created associated with the target NFT, wherein the metadata of the certificate NFT includes relevant information of the NFT creation contract And the certificate information data, the second identification information is the identification information obtained after the metadata of the certificate NFT is stored in the blockchain;

The certificate NFT creation unit is configured to call a certificate creation contract to create the certificate NFT based on the second identification information, wherein the certificate creation contract corresponds to the certificate verification contract.
A data verification device including:

The target NFT verification unit is configured to call the certificate verification contract based on the metadata of the target NFT and the The metadata of the certificate NFT associated with the target NFT verifies the target NFT;

a verification result output unit configured to output the verification result;

Wherein, the target NFT is created by an NFT creation contract based on the first identification information corresponding to the metadata of the target NFT, and the certificate NFT is created by a certificate creation contract corresponding to the certificate verification contract based on the certificate NFT. Created from the second identification information corresponding to the metadata,

The metadata of the target NFT includes identification information corresponding to the certificate information data associated with the target NFT and the address of the certificate verification contract used to verify the target NFT. The metadata of the certificate NFT includes The relevant information of the NFT creation contract and the certificate information data,

The first identification information is the identification information obtained after the metadata of the target NFT is stored in the blockchain, and the identification information corresponding to the certificate information data is the identification information obtained after the certificate information data is stored in the blockchain. , the second identification information is the identification information obtained after the metadata of the certificate NFT is stored in the blockchain.
An electronic device including:

at least one processor;

at least one memory storing computer-executable instructions,

Wherein, the computer-executable instructions, when executed by the at least one processor, cause the at least one processor to execute the data processing method as claimed in any one of claims 1 to 7 or as claimed in claim 8 The data verification method according to any one of claims 13 to 13.
A computer-readable storage medium that, when executed by at least one processor, causes the at least one processor to execute the data of any one of claims 1 to 7 Processing method or data verification method according to any one of claims 8 to 13.
A computer program product, comprising computer-executable instructions, which, when executed by a processor, implement the data processing method as claimed in any one of claims 1 to 7 or as claimed in claims 8 to 13 The data verification method according to any one of the claims.
A computer program that, when executed by a processor, implements the data processing method as described in any one of claims 1 to 7 or the method as described in any one of claims 8 to 13 Data validation methods.