CN114553515B - Block chain-based NFT asset checking method, business processing method and hardware - Google Patents

Block chain-based NFT asset checking method, business processing method and hardware Download PDF

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Publication number
CN114553515B
CN114553515B CN202210148171.3A CN202210148171A CN114553515B CN 114553515 B CN114553515 B CN 114553515B CN 202210148171 A CN202210148171 A CN 202210148171A CN 114553515 B CN114553515 B CN 114553515B
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nft
target
asset
chain
source address
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CN114553515A (en
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张中文
卓海振
刘地军
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Alipay Hangzhou Information Technology Co Ltd
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Alipay Hangzhou Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/12—Applying verification of the received information
    • H04L63/126—Applying verification of the received information the source of the received data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/12—Applying verification of the received information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Storage Device Security (AREA)

Abstract

The specification discloses a block chain-based NFT asset inspection method, business processing method and hardware. The blockchain is deployed with an intelligent contract of a target NFT asset, the intelligent contract including a certification identification of the blockchain corresponding to the target NFT asset, a chain external source address, and an electronic certification. The inspection method comprises the following steps: and receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified. Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.

Description

Block chain-based NFT asset checking method, business processing method and hardware
Technical Field
The present document relates to the field of computer technologies, and in particular, to a block chain based NFT asset inspection method, a business processing method, and hardware.
Background
Non-homogenous tokens (NFT) are a unit of data on a blockchain, each token may represent a unique digital profile. Because they are not interchangeable, non-homogenous tokens may represent digital files such as drawings, sounds, movies, items in games, or other forms of creative work. NFTs can be classified into unbound NFTs and bound NFTs according to the way they interact with the infrand world. An unbound NFT refers to all information of a pass (token) that exists only on the chain and is not associated with extra-chain resources (information). Binding NFT refers to the token being associated with off-chain assets. Among the binding NFTs, there are further subdivided strong binding NFTs. The strong binding NFT refers to that the offchain asset associated with the token is legal, that is, there is some checking mechanism to prove that the token has not been tampered with or replaced with the offchain asset. Obviously, the strong binding type NFT is safer and more reliable, and also accords with the design concept of block chain decentralization.
At present, several schemes for realizing the strong binding NFT have high data storage cost or poor usability, and lack practical value.
Disclosure of Invention
The embodiment of the specification provides a block chain-based NFT asset checking method, a business processing method and hardware, which can realize the strong binding of information on an NFT chain and legal assets outside the chain with lower storage cost and high usability.
In order to solve the above technical problems, the embodiments of the present specification are implemented as follows:
in a first aspect, a method for checking a blockchain-based NFT asset is provided, wherein the blockchain is deployed with an intelligent contract of a target NFT asset, and the intelligent contract comprises a certification identifier, a chain external source address and an electronic certification of the corresponding blockchain of the target NFT asset; the method comprises the following steps:
receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
In a second aspect, a business processing method of a blockchain-based NFT asset is provided, wherein the blockchain is deployed with an intelligent contract of a target NFT asset; the intelligent contract comprises a certification mark of a corresponding blockchain of a target NFT asset, a chain external source address and an electronic certification; the method comprises the following steps:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the service request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the service request; if the service request is consistent, verifying the target NFT asset pointed by the chain external source address in the service request based on the electronic certificate in the intelligent contract, and executing the service flow corresponding to the service request if the verification is passed, otherwise rejecting the service request.
In a third aspect, a checking apparatus for a blockchain-based NFT asset is provided, where the blockchain is deployed with an intelligent contract for a target NFT asset, where the intelligent contract includes a certification identifier, a chain external source address, and an electronic certification for the blockchain corresponding to the target NFT asset, and the apparatus includes:
A first receiving module, configured to receive a verification request of a client for the target NFT asset, where the verification request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
The first execution module calls the intelligent contract to execute based on the certification mark in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
In a fourth aspect, an electronic device is provided, including: a processor; and a memory arranged to store computer executable instructions that, when executed, cause the processor to:
receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
In a fifth aspect, a computer-readable storage medium storing one or more programs that, when executed by an electronic device comprising a plurality of application programs, cause the electronic device to:
receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
In a sixth aspect, a processing apparatus for a blockchain-based NFT asset, where the blockchain is deployed with a smart contract for a target NFT asset, where the smart contract includes a certification identification, a chain external source address, and an electronic certification for the blockchain for the target NFT asset, the apparatus comprising:
A second receiving module, configured to receive a service request for a target NFT asset initiated by a client, where the service request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
The second execution module calls the intelligent contract to execute based on the certification mark in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
In a seventh aspect, an electronic device is provided, including: a processor; and a memory arranged to store computer executable instructions that, when executed, cause the processor to:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
In an eighth aspect, a computer-readable storage medium is provided, the computer-readable storage medium storing one or more programs that, when executed by an electronic device that includes a plurality of application programs, cause the electronic device to:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
The solution of the present embodiments deploys intelligent contracts at the blockchain to record the certification identification, the chain foreign source address and the electronic certification of legitimate NFT assets. When the client side has a verification requirement on the validity of a certain out-of-chain NFT asset, a verification request carrying a pass identification of the out-of-chain NFT asset and an out-of-chain source address can be sent to the blockchain, so that an intelligent contract matched in the blockchain is called based on the pass identification in the verification request, the source of the out-of-chain NFT asset is verified according to the out-of-chain source address in the intelligent contract, after the source verification is passed, the data of the out-of-chain NFT asset is verified according to the electronic pass in the intelligent contract, and therefore strong binding of the out-of-chain NFT asset and on-chain data consistency is achieved. It can be seen that the whole scheme has relatively simple data storage requirements for intelligent contracts, and effectively controls the storage whole cost; meanwhile, for a user, the verification of the out-of-chain NFT asset by calling the intelligent contract is very convenient, so that the method has higher usability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the specification, illustrate and explain the exemplary embodiments of the present specification and their description, are not intended to limit the specification unduly. In the drawings:
fig. 1 is a flow chart of a method for checking NFT assets based on blockchain according to an embodiment of the present disclosure.
Fig. 2 is a flow chart of a business processing method of NFT asset based on blockchain according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a checking device for NFT assets based on blockchain according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a service processing apparatus of a NFT asset based on a blockchain according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
For the purposes, technical solutions and advantages of this document, the technical solutions of this specification will be clearly and completely described below with reference to specific embodiments of this specification and corresponding drawings. It will be apparent that the embodiments described are only some, but not all, of the embodiments of this document. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
NFT is a unit of data on what is known as a blockchain (digital ledger) that, by virtue of having non-homogenous properties, can represent items such as drawings, sounds, movies, in-game items, or other forms of creative work. Taking the example of purchasing an artwork, when the collector purchases an artwork, they sign a contract to transfer ownership and then receive a proof of authenticity to prove that they have the original work. NFT operates in a similar manner to create a non-replicable digital token (hence "non-homogeneous") in the blockchain and will automatically track the overall ownership history and sales price of the underlying file. The potential buyer of any NFT asset will see exactly when it was created, when it was purchased and sold, how much the price was created by whom. Thus, not only is the entire process of generating formal ownership decentralised, but all transaction histories are transparent, which makes the valuation process smoother. And the liability (e.g., apparel or real estate) from digital goods (e.g., items that exist in the virtual world) to physical assets can be represented by NFT.
From a technical perspective, NFT is a block chain license (token) concept that specifies an id for each token, so that each token is unique, and token information is stored on the block chain, so that its uniqueness, openness, non-tamper-ability, security can be guaranteed. The NFT may function as a 'digital certificate', with each token corresponding to a particular asset.
Compared with an unbound NFT, the strong binding NFT needs to further ensure that the out-of-chain NFT asset corresponding to the token cannot be tampered or can trace the tampering operation. That is, proving that token corresponds to an out-of-chain NFT asset as legitimate. The current schemes for implementing the strong binding NFT have the defects of high data storage cost or poor usability, which are more or less difficult to ignore. For example, one mainstream approach is to upload data of NFT assets to IPFS (a distributed file system) network to guarantee the authenticity of NFT assets using the distributed, point-to-point, and non-tamperable features of IPFS. In this way, the user is required to upload the data to IPFS network for certification, the usability is poor, and the cost for storing the data by using IPFS network is relatively high.
Therefore, the present disclosure aims to improve storage cost and usability, and proposes a brand new technical solution for implementing strong binding of data on NFT chain and legal out-of-chain assets.
FIG. 1 is a flow diagram of a method of checking a blockchain-based NFT asset, according to an embodiment of the present disclosure, a blockchain deployed with a smart contract for a target NFT asset, the smart contract including a certification identification, a chain foreign source address, and an electronic certification for the blockchain for the target NFT asset; the method comprises the following steps:
S102, receiving a verification request of a client for a target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified.
It should be appreciated that NFT is a service in a blockchain, and that the check request described herein may be initiated to the blockchain by a client when there is a need to determine the legitimacy of a target NFT asset that is out of the chain. The blockchain itself records the certification (associated meta-information) of the target NFT asset, so the certification identification belongs to the known information. The chain foreign source address carried by the check request is not necessarily trusted, and the purpose of the check request is to request the blockchain to verify the validity of the target NFT asset pointed to by the chain foreign source address in the check request. In practice, the client may be any of the parties to the business of the NFT asset. For example, as a buyer may verify that a target NFT asset of a seller is a legitimate asset by requesting a blockchain, or as a seller may request that the blockchain prove to the buyer that the NFT asset sold by itself is legitimate.
S104, calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
It should be understood that. The smart contract of the present embodiment includes execution logic to verify the target NFT asset pointed to by the chain foreign source address in the verification request.
If the chain foreign source address in the smart contract is inconsistent with the chain foreign source address in the check request, the source of the target NFT asset to be checked by the client is not trusted, and at this time, the check failure can be directly determined.
Conversely, if the chain foreign source address in the smart contract is consistent with the chain foreign source address in the verification request, although the source of the target NFT asset to be verified by the client is indicated to be trusted, it cannot be proved whether the target NFT asset pointed to by the source is authentic, and the target NFT asset is possibly tampered with or replaced, so that the target NFT asset pointed to by the chain foreign source address in the verification request is further verified based on the electronic certificate in the smart contract.
An electronic proof is a proof that "the data is that at a certain time".
The method of the embodiment of the specification can perform encryption calculation on the data of the target NFT asset synthesized, and takes the encryption calculation result as the electronic certificate of the target NFT asset.
Correspondingly, the intelligent contract uses the same algorithm for generating the electronic certificate to carry out encryption calculation on the target NFT asset pointed by the chain external source address in the verification request, if the encryption calculation result is inconsistent with the electronic certificate in the intelligent contract, the target NFT asset pointed by the chain external source address is tampered or replaced, and the verification is judged to be failed. Otherwise, the target NFT asset pointed by the chain external source address is judged to pass verification, wherein the target NFT asset pointed by the chain external source address is not tampered or replaced.
Obviously, for the application scenario of NFT asset transactions, if the verification result indicates failed, it indicates that the vendor may provide an NFT asset that is a phishing website, or that the NFT asset is not authentic, all of which prove that the vendor is not the owner of the legitimate target NFT asset, so the resulting verification result can be used to decide whether the NFT asset transaction is performed.
It follows that the method of embodiments of the present description deploys a smart contract at the blockchain to record the certification identification, the out-of-chain source address, and the electronic certification of legitimate NFT assets. When the client side has a verification requirement on the validity of a certain out-of-chain NFT asset, a verification request carrying a pass identification of the out-of-chain NFT asset and an out-of-chain source address can be sent to the blockchain, so that an intelligent contract matched in the blockchain is called based on the pass identification in the verification request, the source of the out-of-chain NFT asset is verified according to the out-of-chain source address in the intelligent contract, after the source verification is passed, the data of the out-of-chain NFT asset is verified according to the electronic pass in the intelligent contract, and therefore strong binding of the out-of-chain NFT asset and on-chain data consistency is achieved. It can be seen that the whole scheme has relatively simple data storage requirements for intelligent contracts, and effectively controls the storage whole cost; meanwhile, for a user, the verification of the out-of-chain NFT asset by calling the intelligent contract is very convenient, so that the method has higher usability.
Further, to increase the verification efficiency of NFT assets, the verification request may also carry an electronic proof of the target NFT asset provided by the client. The intelligent contract of the embodiment of the specification can also preliminarily judge whether the electronic certificate of the intelligent contract is consistent with the electronic certificate of the verification request before verifying the target NFT asset pointed by the chain external source address in the verification request based on the electronic certificate of the intelligent contract, if the client cannot provide the correct electronic certificate in the verification request, the intelligent contract can directly judge that the verification fails, and the electronic certificate is not wasted any more to be compared with the target NFT asset pointed by the chain external source address.
The following specifically defines a scheme of the embodiment of the present specification in connection with an actual application scenario.
The application scenario designs intelligent contracts of NFT assets in a blockchain in order to associate a token of the blockchain for NFT assets with only NFT assets that are legal outside the chain.
Taking the target NFT asset as an example herein, the smart contract for the target NFT asset needs to include:
The blockchain tokenID corresponding to the target NFT asset, and the legal uniform resource identifier URI and electronic certificate that are strongly bound to the target NFT asset tokenID.
Wherein:
tokenID, a generic identifier as described herein. In this application scenario, the blockchain may configure a dedicated intelligence contract for each NFT asset, and the intelligence contract of the target NFT asset may be matched in the blockchain by the tokenID of the blockchain corresponding to the target NFT asset. Alternatively, the blockchain may configure a common smart contract for multiple NFT assets, and the URI and electronic certificate strongly bound to the tokenID in the smart contract may be found by the tokenID of the blockchain corresponding to the target NFT asset.
The URI, the chain foreign source address of the target NFT asset described herein, may be used to obtain data of the target NFT asset by accessing the URI.
The electronic certification is obtained by encrypting and calculating the data of legal target NFT assets. In general, it is necessary to perform integrity verification on the data of the target NFT asset to accurately identify whether tampering or replacement has occurred, so the electronic certificate is preferably calculated based on the complete data of the target NFT asset.
The present application scenario does not specifically limit the source of legal target NFT assets, therefore, URIs in smart contracts may be, but are not limited to, addresses stored by a blockchain distributed network, such as ipfs addresses, and may also be common web protocol addresses, such as http/https addresses, and the like.
If the URI links of the target NFT asset are of a single level structure, the smart contract stores only the single level URI itself. If the URI links of the target NFT asset are multi-level structures, such as level0 URI- & gtlevel 1 URI- & gtlevel 2 URI- & gtlevel 3 URI, to simplify the storage cost of the smart contract, the URI field in the smart contract stores only the value of the first level URI link, i.e., the "level0 URI", regardless of how many levels the URI links exist. Although the URI field in the smart contract, if only the first level URI link is stored, can only provide a relatively limited verification for the source of the target NFT asset, the data verification of the target NFT asset is further matched with the electronic certificate in the smart contract, so that the security requirement of the NFT service is completely satisfied.
Here, taking the URI linking of the target NFT asset as an example of a multi-level structure, performing the verification process based on the smart contract includes:
The client initiates a verification request of the target NFT asset to the blockchain, wherein the verification request carries: tokenId of client-provided target NFT asset: _ tokenId, URI of multi-level structure: hash electronic proof of url, and complete data: hashValue.
Thereafter, the smart contract is run according to_ tokenId, query legal URLs bound to_ tokenId and hashValue, compare if_uri is the same as URL, and if_ hashValue is the same as hashValue.
If at least one of the_uri and the_ hashValue is inconsistent with the information of the smart contract, judging that the verification is not passed, and feeding back a verification result to the client.
Otherwise, the target NFT asset is further acquired according to _ uri. In this way, taking the target NFT asset as an example of a picture, a hash value hv of the target NFT asset is calculated.
Compare whether hv and_ hashValue are the same (or hv and hashValue may also be compared).
If hv and hashValue are inconsistent, judging that the verification is not passed, and feeding back the verification result to the client.
If hv and hashValue are consistent, the verification is judged to pass, and the verification result is fed back to the client.
FIG. 2 is a flow diagram of a blockchain-based NFT asset processing method in accordance with embodiments of the present disclosure, the blockchain deployed with a smart contract for a target NFT asset, the smart contract including a certification identification, a chain foreign source address, and an electronic certification for the blockchain for the target NFT asset; the method comprises the following steps:
Step S202, a service request for a target NFT asset initiated by a client is received, where the service request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified.
It should be appreciated that NFT is based on a service in a blockchain, and that the service request described herein may be, but is not limited to, a client requesting a blockchain to conduct a transaction or lease on a target NFT asset, or other title transfer related operation. If the client is acting as a buyer or lessor of the target NFT asset, the buyer or lessor cannot determine whether the seller or lessor is a legitimate holder of the target NFT asset or cannot determine that a legitimate target NFT asset is provided, and therefore it is necessary to provide the out-of-chain source address of the target NFT asset that is actually known to itself in the business request to be verified for the out-of-chain target NFT asset. Similarly, if the client is acting as the seller or lessor of the target NFT asset, it is also necessary to provide the real, out-of-chain source address of the target NFT asset in the service request to prove itself to the buyer as the legitimate holder of the target NFT asset or to prove that the target NFT asset is provided as legitimate by way of requesting blockchain verification.
Step S204, calling the intelligent contract to execute based on the license identifier in the service request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the service request; if the service request is consistent, verifying the target NFT asset pointed by the chain external source address in the service request based on the electronic certificate in the intelligent contract, and executing the service flow corresponding to the service request if the verification is passed, otherwise rejecting the service request.
It should be understood that. The intelligent contract of the embodiment comprises execution logic for checking target NFT assets pointed by chain external source addresses in service requests, and execution logic for selecting whether to accept service flows or not based on the service requests.
If the chain external source address in the intelligent contract is inconsistent with the chain external source address in the service request, the source of the target NFT asset to be verified by the client is not trusted, and the verification failure can be directly judged at the moment, and the service request is refused.
Conversely, if the chain external source address in the smart contract is consistent with the chain external source address in the service request, although the source of the target NFT asset to be verified by the client is indicated to be trusted, it cannot be proved whether the target NFT asset pointed to by the source is authentic, and the target NFT asset is possibly tampered with or replaced, so that the target NFT asset pointed to by the chain external source address in the service request is further verified based on the electronic certificate in the smart contract. If the verification is passed, the target NFT asset business processing has higher safety, and the business process corresponding to the business request is selected to be executed. Otherwise, rejecting the service request of the client.
In practice, the target NFT asset may be a data asset, and the chain foreign source address in the smart contract includes a URI link of the target NFT asset. If the URI links of the target NFT asset are of a multi-level structure, the chain external source address in the intelligent contract only records the first-level URI links, and the chain external source address in the verification request comprises complete URI links;
The method of the embodiments of the present description deploys an intelligent contract in the blockchain to record the certification identification, the chain foreign source address and the electronic certification of the legitimate NFT asset. When a client wants to conduct related services such as transaction, lease and the like on an uncertain out-of-chain NFT asset, a service request carrying a certification mark and an out-of-chain source address of the NFT asset can be sent to a blockchain, so that an intelligent contract matched in the blockchain is called based on the certification mark in service processing, the source of the out-of-chain NFT asset is checked according to the out-of-chain source address in the intelligent contract, after the source check passes, the data of the out-of-chain NFT asset is checked according to an electronic certification in the intelligent contract, and accordingly whether the service is accepted or not is decided according to a final check result, and service risks are reduced.
Fig. 3 is a schematic structural diagram of a checking apparatus 300 for a NFT asset based on a blockchain, according to an embodiment of the present disclosure, including:
A first receiving module 310, configured to receive a verification request of a client for the target NFT asset, where the verification request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
The first execution module 320 invokes the smart contract to execute, based on the certification identifier in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
The apparatus of the embodiments of the present description deploys an intelligent contract at the blockchain to record the certification identification, the chain foreign source address and the electronic certification of the legitimate NFT asset. When the client side has a verification requirement on the validity of a certain out-of-chain NFT asset, a verification request carrying a pass identification of the out-of-chain NFT asset and an out-of-chain source address can be sent to the blockchain, so that an intelligent contract matched in the blockchain is called based on the pass identification in the verification request, the source of the out-of-chain NFT asset is verified according to the out-of-chain source address in the intelligent contract, after the source verification is passed, the data of the out-of-chain NFT asset is verified according to the electronic pass in the intelligent contract, and therefore strong binding of the out-of-chain NFT asset and on-chain data consistency is achieved. It can be seen that the overall scheme is relatively simple for the data storage requirements of the smart contract, while verifying the out-of-chain NFT asset based on the way the smart contract is invoked also has a high ease of use for the user.
Optionally, the target NFT asset is a data asset and the chain foreign source address in the smart contract includes a URI link of the target NFT asset.
Optionally, the URI links of the target NFT asset are multi-level structures, the chain foreign source address in the smart contract includes only a first level URI link, and the chain foreign source address in the check request includes a complete URI link; the first execution module 320 determines whether the chain alien source address in the smart contract is consistent with the chain alien source address in the check request, including: and judging whether the chain external source address in the intelligent contract is consistent with the first-level URI link of the chain external source address in the check request.
Optionally, the verification request further carries an electronic certificate of the target NFT asset provided by the client; the first execution module 320, upon invoking the smart contract, also executes: judging whether the electronic certificate in the intelligent contract is consistent with the electronic certificate in the verification request; and if the electronic certificate and the external source address in the intelligent contract are consistent with the electronic certificate and the external source address in the verification request, executing the step of verifying the target NFT asset pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract.
Optionally, the electronic certificate in the intelligent contract is obtained by encrypting the complete data of the NFT asset; the first execution module 320 invokes the smart contract to perform integrity verification on data of the target NFT asset pointed to by the chain external source address in the verification request, based in particular on the electronic certificate in the smart contract.
Obviously, the verification device in the embodiment of the present disclosure can implement the steps and functions in the embodiment shown in the drawings, which are not described in detail herein.
Fig. 4 is a schematic structural diagram of a service processing apparatus 400 of a block chain based NFT asset according to an embodiment of the present disclosure, including:
The second receiving module 410 receives a service request for a target NFT asset initiated by a client, where the service request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified.
The second execution module 420 invokes the smart contract to execute, based on the certification identifier in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
Optionally, the target NFT asset is a data asset and the chain foreign source address in the smart contract includes a URI link of the target NFT asset.
Alternatively, if the URI links of the target NFT asset are of a single level structure, the smart contract stores only the single level URI itself. If the URI links of the target NFT asset are of a multi-level structure, the chain external source address in the intelligent contract only comprises a first-level URI link, and the chain external source address in the service request comprises a complete URI link; the second execution module 420 determines whether the chain alien source address in the smart contract is consistent with the chain alien source address in the service request, including: and judging whether the chain external source address in the intelligent contract is consistent with the first-level URI link of the chain external source address in the service request.
Optionally, the service request further carries an electronic certificate of the target NFT asset provided by the client; the second execution module 420, upon invoking the smart contract, also executes: judging whether the electronic certificate in the intelligent contract is consistent with the electronic certificate in the service request; and if the electronic certificate and the external source address in the intelligent contract are consistent with the electronic certificate and the external source address in the service request, executing the step of checking the target NFT asset pointed by the chain external source address in the service request based on the electronic certificate in the intelligent contract.
Optionally, the electronic certificate in the intelligent contract is obtained by encrypting the complete data of the NFT asset; the second execution module 420 invokes the smart contract to perform integrity verification on the data of the target NFT asset pointed to by the chain external source address in the verification request, based in particular on the electronic certificate in the smart contract.
The apparatus of the embodiments of the present description deploys an intelligent contract at the blockchain to record the certification identification, the chain foreign source address and the electronic certification of the legitimate NFT asset. When a client wants to conduct related services such as transaction, lease and the like on an uncertain out-of-chain NFT asset, a service request carrying a certification mark and an out-of-chain source address of the NFT asset can be sent to a blockchain, so that an intelligent contract matched in the blockchain is called based on the certification mark in service processing, the source of the out-of-chain NFT asset is checked according to the out-of-chain source address in the intelligent contract, after the source check passes, the data of the out-of-chain NFT asset is checked according to an electronic certification in the intelligent contract, and accordingly whether the service is accepted or not is decided according to a final check result, and service risks are reduced.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. Referring to fig. 5, at the hardware level, the electronic device includes a processor, and optionally an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least 1 disk Memory. Of course, the electronic device may also include hardware required for other services.
The processor, network interface, and memory may be interconnected by an internal bus, which may be an ISA (Industry Standard Architecture ) bus, a PCI (PERIPHERAL COMPONENT INTERCONNECT, peripheral component interconnect standard) bus, or EISA (Extended Industry Standard Architecture ) bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 5, but not only one bus or type of bus.
And the memory is used for storing programs. In particular, the program may include program code including computer-operating instructions. The memory may include memory and non-volatile storage and provide instructions and data to the processor.
The processor reads the corresponding computer program from the nonvolatile memory into the memory and then runs the computer program, and the checking device for the NFT asset is formed on a logic level. The processor is used for executing the programs stored in the memory and is specifically used for executing the following operations:
And receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified.
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
Or the processor reads the corresponding computer program from the nonvolatile memory into the memory and then runs the computer program to form the business processing device for the NFT asset on a logic level. The processor is used for executing the programs stored in the memory and is specifically used for executing the following operations:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
The method disclosed in the embodiment shown in fig. 1 or fig. 2 of the present specification may be applied to a processor or implemented by a processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps, and logic blocks disclosed in one or more embodiments of the present description may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with one or more embodiments of the present disclosure may be embodied directly in a hardware decoding processor or in a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
The electronic device may also execute the state backup method in the coalition chain of fig. 1, which is not described herein.
Of course, in addition to the software implementation, the electronic device in this specification does not exclude other implementations, such as a logic device or a combination of software and hardware, that is, the execution subject of the following process is not limited to each logic unit, but may also be hardware or a logic device.
The present specification embodiment also proposes a computer-readable storage medium storing one or more programs.
Wherein the one or more programs include instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the method of the embodiment of fig. 1, and in particular to:
And receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified.
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
Or the one or more programs, comprise instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the method of the embodiment of fig. 2, and in particular to:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
In summary, the foregoing description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, or the like, which is within the spirit and principles of one or more embodiments of the present disclosure, is intended to be included within the scope of one or more embodiments of the present disclosure.
The system, apparatus, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

Claims (12)

1. A method for checking NFT assets based on a blockchain, the blockchain being deployed with an intelligent contract for a target NFT asset, the intelligent contract including a certification identification, a chain external source address and an electronic certification for the blockchain corresponding to the target NFT asset; the method comprises the following steps:
receiving a verification request of a client for the target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
2. The NFT asset inspection method of claim 1,
The target NFT asset is a data asset, and a chain foreign source address in the smart contract includes a URI link of the target NFT asset.
3. The method according to claim 2,
If the URI link of the target NFT asset is of a multi-level structure, the chain external source address in the intelligent contract only comprises a first-level URI link, and the chain external source address in the verification request comprises a complete URI link;
determining whether a chain foreign source address in the smart contract is consistent with a chain foreign source address in the check request includes:
And judging whether the chain external source address in the intelligent contract is consistent with the first-level URI link of the chain external source address in the check request.
4. The method according to claim 1,
The verification request also carries an electronic certificate of the target NFT asset provided by the client;
The intelligent contract further performs, when invoked: judging whether the electronic certificate in the intelligent contract is consistent with the electronic certificate in the verification request; and if the electronic certificate and the external source address in the intelligent contract are consistent with the electronic certificate and the external source address in the verification request, executing the step of verifying the target NFT asset pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract.
5. The method according to claim 1,
The electronic certificate in the intelligent contract is obtained by encrypting the complete data of the NFT asset;
Verifying, based on the electronic certificate in the smart contract, a target NFT asset pointed to by a chain foreign source address in the verification request, including:
and carrying out integrity check on the data of the target NFT asset pointed by the chain external source address in the check request based on the electronic certificate in the intelligent contract.
6. A business processing method of NFT assets based on a blockchain deployed with intelligent contracts of target NFT assets; the intelligent contract comprises a certification mark of a corresponding blockchain of a target NFT asset, a chain external source address and an electronic certification; the method comprises the following steps:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
Calling the intelligent contract to execute based on the pass identification in the service request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the service request; if the service request is consistent, verifying the target NFT asset pointed by the chain external source address in the service request based on the electronic certificate in the intelligent contract, and executing the service flow corresponding to the service request if the verification is passed, otherwise rejecting the service request.
7. A checking apparatus for a blockchain-based NFT asset, the blockchain deployed with a smart contract for a target NFT asset, the smart contract including a certification identification, a chain foreign source address, and an electronic certification for the corresponding blockchain of the target NFT asset, the apparatus comprising:
A first receiving module, configured to receive a verification request of a client for the target NFT asset, where the verification request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
The first execution module calls the intelligent contract to execute based on the certification mark in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
8. An electronic device, comprising: a processor; and a memory arranged to store computer executable instructions that, when executed, cause the processor to:
receiving a verification request of a client for a target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified; the intelligent contracts comprise a certification mark, a chain external source address and an electronic certification of the target NFT asset corresponding to the blockchain, wherein the blockchain to which the target NFT asset belongs is deployed with the intelligent contracts of the target NFT asset;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
9. A computer-readable storage medium storing one or more programs that, when executed by an electronic device comprising a plurality of application programs, cause the electronic device to:
receiving a verification request of a client for a target NFT asset, wherein the verification request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified; the intelligent contracts comprise a certification mark, a chain external source address and an electronic certification of the target NFT asset corresponding to the blockchain, wherein the blockchain to which the target NFT asset belongs is deployed with the intelligent contracts of the target NFT asset;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; and if the target NFT assets are consistent, verifying the target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and feeding back a verification result to the client.
10. A processing apparatus for a blockchain-based NFT asset, the blockchain deployed with a smart contract for a target NFT asset, the smart contract including a certification identification, a chain foreign source address, and an electronic certification for the corresponding blockchain of the target NFT asset, the apparatus comprising:
A second receiving module, configured to receive a service request for a target NFT asset initiated by a client, where the service request carries a certification identifier of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified;
The second execution module calls the intelligent contract to execute based on the certification mark in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
11. An electronic device, comprising: a processor; and a memory arranged to store computer executable instructions that, when executed, cause the processor to:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified; the intelligent contracts comprise a certification mark, a chain external source address and an electronic certification of the target NFT asset corresponding to the blockchain, wherein the blockchain to which the target NFT asset belongs is deployed with the intelligent contracts of the target NFT asset;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
12. A computer-readable storage medium storing one or more programs that, when executed by an electronic device comprising a plurality of application programs, cause the electronic device to:
Receiving a service request for a target NFT asset initiated by a client, wherein the service request carries a certification mark of the target NFT asset provided by the client and a chain external source address of the target NFT asset to be verified; the intelligent contracts comprise a certification mark, a chain external source address and an electronic certification of the target NFT asset corresponding to the blockchain, wherein the blockchain to which the target NFT asset belongs is deployed with the intelligent contracts of the target NFT asset;
Calling the intelligent contract to execute based on the pass identification in the verification request: judging whether the external source address of the chain in the intelligent contract is consistent with the external source address of the chain in the check request; if the verification results are consistent, verifying target NFT assets pointed by the chain external source address in the verification request based on the electronic certificate in the intelligent contract, and executing a business process corresponding to the business request if the verification results are passed, otherwise rejecting the business request.
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