TWI792966B - Traction confirming system for non-fungible token - Google Patents

Abstract

A transaction confirming system is applied for non-fungible token (NFT), and includes a mobile electronic device and a hardware electronic wallet. The mobile electronic device has a software electronic wallet after using a public key to execute a software wallet application. The software electronic wallet is applied for a user to input a selected transaction NFT and a transacting address, so as to search a standard smart contract and a selected transaction NFT image file corresponding to the selected transaction NFT. The software electronic wallet is further applied to generate a non-signed smart contract according to the selected transaction NFT, the transacting address and the standard smart contract. The hardware electronic wallet receives and displays the transacting address and selected transaction NFT image file. After the user confirming the transacting address and selected transaction NFT image file are correct, the hardware electronic wallet is operated by the user to use a private key to sign the non-signed smart contract to form a signed smart contract for transaction confirming.

Description

Transaction confirmation system for non-homogeneous token certificates

The present invention relates to a transaction confirmation system, in particular to a transaction confirmation system for non-homogeneous token certificates.

Due to rising awareness of environmental protection and changes in shopping patterns, both consumers and businesses feel that there is a need to use new currency payment methods to meet new consumption patterns or clear business income needs, and electronic payment technology is gradually widely used by the general public. In electronic payment, although physical currency is still used as the denomination unit and electronic certificates are used for payment, most of the personal data (especially identity verification data), payment calculation data, settlement data and account data are stored excessively. It is processed in the cloud server. During the process of data verification and transmission between the mobile communication device and the cloud server, it is relatively easy for hackers to steal personal data or tamper with transaction records. In addition, since the current electronic payment still needs to rely on the system resources of financial institutions or system management operators, after the transaction is completed, a part of the transaction fee is usually deducted, resulting in additional losses for the enterprise.

In order to effectively avoid the centralized storage of most of the transaction data in the cloud server, resulting in easy exposure to the risk of transaction records being stolen or tampered with, a new type of transaction method that utilizes encrypted currency payment is born. In the transaction method of cryptocurrency payment, through the blockchain technology, the previous mode of centralized issuance and verification through the center can be achieved by relying solely on decentralized computer nodes to achieve the functions of verification and value transmission, so it can be decentralized. operate.

On the other hand, under the increasingly heavy pressure of work and life, human beings began to need to relieve the pressure by appreciating and tasting creative works. Under this premise, many creative works, such as paintings, artworks, music, films, art, games, slogans, or other limited-time and limited-edition projects, are in increasing demand in the market. Although these creative works themselves can be copied infinitely, the token certificates representing them can be completely traced and traced on the underlying blockchain, thereby providing buyers with credible proof of ownership and allowing People who have these proofs of ownership have a deeper sense of spiritual satisfaction. As a result, non-homogeneous tokens (English: Non-Fungible Token, referred to as: NFT) were born.

NFT is a data unit known as a blockchain digital ledger. Each NFT can represent a unique digital data as an electronic certification or certificate of virtual commodity ownership. Since both NFT and cryptocurrency are recorded on the blockchain, when trading, you can trade NFT with cryptocurrency as the pricing unit, or use another NFT to (virtually) barter (virtual) things Come and trade NFTs. In practical applications, it is still more common to trade NFT with cryptocurrency as the pricing unit.

Among the existing technologies that use cryptocurrencies as pricing units to trade NFTs, the following two technologies are usually used. The first technique is to store a user's private key directly in a mobile electronic device owned by a user and communicatively linked to the blockchain. An electronic wallet application program (electronic wallet App) is installed in the mobile electronic device. After one-way derivation and decryption of the private key into a public key, the public key can be input to execute the electronic wallet App so that the mobile electronic device has a software electronic function of the wallet. When the mobile electronic device has the function of a software electronic wallet, it can display various cryptocurrencies and amounts recorded in the user's software electronic wallet, and can also search for NFT image files from the blockchain and display them. In order to allow users to watch when conducting NFT transactions, and directly use the private key stored in the mobile electronic device to sign.

Since the private key is the only important basis for determining the access or transaction rights of various virtual items in the blockchain (including cryptocurrencies, NFT or other virtual items built on the blockchain, etc.), once the private key is stolen, the It will lead to the theft or transfer of ownership of various virtual items. However, due to the general usage habits of users, mobile electronic devices are often connected to the Internet through communication, so the private key is often exposed in a communication environment with a high risk of being stolen. In order to solve the above-mentioned problem of high risk of private keys, another existing technology was born.

In another prior art, the method of storing the private key and the public key separately is adopted, wherein the public key is stored in a mobile electronic device held by a user and can be communicatively linked to the blockchain, and the private key is stored in A hardware electronic wallet that cannot communicate with open communication nodes such as the Internet or blockchain. Only when the private key is used to sign the smart contract for transaction, the short-distance communication means is used to communicate with the mobile electronic device to read the smart contract and upload the signed smart contract through the mobile electronic device to the blockchain. However, in the prior art, most of the transactions to be signed and signed by the mobile electronic device to the hardware electronic wallet are binary codes. When using the private key stored in the hardware electronic wallet to sign , It is often necessary to watch the NFT image file displayed on the mobile electronic device to learn about the subject matter and object of the smart contract transaction, so there is a problem that the mobile electronic device must be operated at the same time to transfer to the hardware electronic wallet to complete the signature . If the mobile electronic device is not operated at the time of signing the seal, one can only sign the seal blindly, thus deriving the problem of wrong signature.

In view of the prior art, either there is a problem of high exposure risk of the private key, or there is the problem of the inconvenience of having to operate two devices at the same time or the problem of easy mis-signing. The technical means adopted by the present invention to solve the above-mentioned various problems in the prior art is to provide a non-fungible token certificate (Non-Fungible Token; NFT) transaction confirmation system. The transaction confirmation system of NFT is communicatively linked to a blockchain. The blockchain stores at least one NFT, at least one NFT image file corresponding to the NFT, and at least one standard smart contract for regulating the NFT.

The NFT transaction confirmation system includes a mobile electronic device and a hardware electronic wallet. The mobile electronic device is used to communicate with the block chain, install a software electronic wallet application program, store a public key, and use the public key to execute the software electronic wallet application program as a software electronic wallet. The software electronic wallet includes a software electronic wallet operation interface, a smart contract processing module and an NFT image file search module.

The software electronic wallet operation interface is for a user to input one of the at least one NFT as an NFT to be traded, and for the user to input an address of a traded object. The smart contract processing module is used to search for a standard smart contract for standardizing the NFT to be traded from the at least one NFT standard smart contract in the blockchain according to the input NFT to be traded, and is further used to Generate a smart contract to be signed according to the NFT to be traded, the address of the transaction object and the standard smart contract to be used. The NFT image file search module is used to use the public key and the NFT to be traded to search for an NFT image file to be traded corresponding to the NFT to be traded from the at least one NFT image file in the blockchain.

The hardware electronic wallet is installed with a hardware electronic wallet application program, stores a private key, has a display, and is used to communicate with the mobile electronic device to retrieve the NFT image file to be traded, the address of the transaction object and the smart card to be signed contract. The monitor plays the NFT image file to be traded and displays the address of the trade object.

The hardware electronic wallet generates a transaction confirmation operation interface and a signature generating module after executing the hardware electronic wallet application program. The transaction confirmation operation interface is used to generate an operation confirmation signal for the user to operate and confirm after the user confirms that the NFT image file to be traded and the address of the transaction object displayed on the display are correct. The signature generation module is used to sign the smart contract to be signed with the private key after receiving the operation confirmation signal to form a signed smart contract, and is used to transmit the signed smart contract through the mobile electronic device To the blockchain for transaction confirmation.

On the basis of the above-mentioned necessary technical means, the following auxiliary technical means can be extended. The smart contract processing module may further include a smart contract search unit, and the smart contract search unit searches for a standard smart contract for standardizing the NFT to be traded from the at least one standard smart contract of the NFT according to the NFT to be traded. The smart contract processing module may further include a smart contract generation unit to be signed, and the smart contract generation unit to be signed is used to write the NFT to be traded and the address of the transaction object into the smart contract to be used, and the smart contract to be signed The contract is rewritten into a smart contract to be signed, so as to generate the smart contract to be signed. The mobile electronic device can further have a software wallet storage module to store the public key and the standby standard smart contract searched by the smart contract processing module. The hardware electronic wallet may include a hardware wallet storage module for storing the private key and the signed smart contract.

Preferably, the above-mentioned mobile electronic device can be a smart phone or a tablet computer. In order to reduce the risk of inadvertent leakage or theft of the private key, only when confirming the transaction, the hardware electronic wallet uses a short-distance communication The communication means is connected to the smart phone or the tablet computer, and the short-distance communication means can be a Bluetooth communication means or a near-field wireless communication (Near-field communication, NFC) means.

It can be seen from the above description that in the NFT transaction confirmation system provided by the present invention, the private key and the public key are stored in the hardware electronic wallet and the mobile electronic device respectively. The entire transaction confirmation process can be roughly divided into two stages. The main work of the first stage is to generate a standard smart contract to be used based on the NFT to be traded and the address of the transaction object entered by the user on the mobile electronic device, and to search out the pending Transaction NFT image file; the second stage is to display the NFT image file to be traded and the address of the transaction object in the hardware electronic wallet for the user to operate to generate a signed smart contract for transaction confirmation.

Because in the first stage, the private key will not be used at all, and the hardware electronic wallet will not be connected to the mobile electronic device. Only in the second stage will the hardware electronic wallet be communicated by means of short-distance communication. Linked to mobile electronic devices, it can effectively reduce the risk of private key leakage or theft. In addition, since the user uses the hardware electronic wallet to sign the smart contract to be signed in the second stage, he can directly view the NFT image file to be traded and the address of the transaction object in the hardware electronic wallet, so there is no need to operate at the same time When watching the mobile electronic device, you can also know the complete information to complete the signature, thus greatly improving the convenience of operation and greatly reducing the risk of false signature.

Since the transaction confirmation system for non-homogeneous token certificates provided by the present invention can be widely used in the field of transaction confirmation for various non-homogeneous token certificates, and its combination implementation methods are too numerous to enumerate, so it will not be repeated here One by one will be described in detail, and only one preferred embodiment will be listed for specific description.

Please refer to the first figure, which is a functional block diagram showing the transaction confirmation system of the non-homogeneous token certificate provided by the preferred embodiment of the present invention before working with the block chain. As shown in the first figure, a non-fungible token certificate (Non-Fungible Token; NFT) transaction confirmation system (hereinafter referred to as "NFT transaction confirmation system") 100 is used to communicate with a block chain 200 . In this embodiment, the block chain 200 stores three NFTs N1~N3, three NFT image files NF1~NF3 corresponding to NFTs N1~N3, and three standard smart contracts SC1 respectively used to standardize NFTs N1~N3 ~SC3. The NFT image files NF1~NF3 can be static image files or dynamic image files, and can be displayed as static or dynamic file icons (Icon). In practical applications, the number of NFTs, NFT image files and standard smart contracts stored in the blockchain 200 is often far more than three, and only three of them are listed above for illustration.

The so-called standard smart contracts SC1~SC3 refer to the ownership of NFT N1~N3 and their transfer rules and other related information (including the link of the NFT to be traded and its current owner address, transaction object address, transaction encryption Currency types, transaction process rules and other relevant information) standardized electronic contracts. Different types of NFTs can be regulated corresponding to different types of standard smart contracts. For example: NFTs of audio-visual works, art works or games can be regulated by corresponding types of standard smart contracts.

The NFT transaction confirmation system 100 includes a mobile electronic device 1 and a hardware electronic wallet 2 . In a specific application of the present invention, the mobile electronic device 1 can be a smart phone or a tablet computer. The mobile electronic device 1 is held by a user 300 for communicating with the block chain 200, is installed with a software electronic wallet application 11, and has a software wallet storage module 12 for storing a public key PUK . The hardware electronic wallet 2 is installed with a hardware electronic wallet application program (ie, hardware electronic wallet App) 21 , including a hardware wallet storage module 22 and a display 23 . A private key PRK is stored in the hardware wallet storage module 22 . The hardware electronic wallet 2 here refers especially to a portable electronic device that stores a private key but does not have the ability to connect to an open data access node such as a block chain or the Internet.

Please refer to the second figure, which shows the functional block diagram of the preferred embodiment of the present invention after the first stage of operation. As shown in the second figure, there is a software electronic wallet 13 after executing the software electronic wallet application program 11 using the public key PUK. The software electronic wallet 13 includes a software electronic wallet operation interface 131 , a smart contract processing module 132 and an NFT image file search module 133 .

The software electronic wallet operation interface 131 is for the user 300 to select and input one of the NFTs N1-N3 as an NFT to be traded. In this embodiment, the user 300 selects NFT N2 as the NFT to be traded. At the same time, the software electronic wallet operation interface 131 is also for the user 300 to input a transaction object address TA of a transaction object, and store the transaction object address TA in the software wallet storage module 12 . The so-called transaction object address TA refers to the address representing the next owner of the NFT to be traded (ie NFT N2) after the transaction is completed.

The smart contract processing module 132 includes a smart contract search unit 1321 and a smart contract generation unit 1322 to be signed. The smart contract search unit 1321 is used to search for one of the standard smart contracts SC1~SC3 in the blockchain 200 to standardize one of the NFTs to be traded as a pending NFT according to the input NFT to be traded (NFT N2). Using the standard smart contract means searching for the standard smart contract SC2 used to regulate NFT N2 as the standard smart contract to be used.

The smart contract to be signed generation unit 1322 is used to write one of the link paths of the NFT to be traded (ie NFT N2) and the transaction object address TA into the standby standard smart contract (ie standard smart contract SC2) and write the standby standard smart contract The contract is rewritten into a smart contract NSC to be signed, thereby generating a smart contract NSC to be signed, and the smart contract NSC to be signed can be further stored in the software wallet storage module 12 . The NFT image file search module 133 is used to use the public key PUK and the NFT to be traded (ie, NFT N2 ) to search for a corresponding NFT to be traded (ie, NFT N2 ) from the NFT image files NF1~NF3 in the blockchain 200 ), and store the NFT image file SNF to be traded in the software wallet storage module 12 .

It can be seen from the above description that the above-mentioned software electronic wallet operation interface 131, smart contract processing module 132 (including the smart contract search unit 1321 and the smart contract generation unit 1322 to be signed) and the NFT image file search module 133 are all in action The mobile electronic device 1 executes the software electronic wallet application program 11, more specifically, it is generated after the mobile electronic device 1 executes the corresponding main program and subprogram in the software electronic wallet application program 11.

Please refer to the third figure, which shows the functional block diagram of the preferred embodiment of the present invention after the second stage of operation. As shown in the third figure, after the user 300 operates the mobile electronic device 1 to generate the smart contract NSC to be signed and retrieve the NFT image file SNF to be traded, if the user 300 wants to further sign the smart contract NSC to be signed Chapter, then at this time, the hardware electronic wallet 2 can be further connected to the mobile electronic device 1 by a short-distance communication means. The short-distance communication means can be a bluetooth communication means or a near-field wireless communication (Near-field communication, NFC) means.

By means of short-distance communication, the hardware electronic wallet 2 can automatically retrieve the NFT image file SNF to be traded, the address TA of the transaction object, and the smart contract NSC to be signed from the mobile electronic device 1 . The hardware electronic wallet 2 generates a transaction confirmation operation interface 24 and a signature generation module 25 after executing the hardware electronic wallet application program 21 . When the user 300 operates the transaction confirmation operation interface 24, the display 23 can play the NFT image file SNF to be traded and display the transaction target address TA. After the user 300 confirms that the NFT image file SNF to be traded and the address TA of the transaction object displayed on the display 23 are correct, the transaction confirmation operation interface 24 is available for the user 300 to perform operation confirmation, and an operation confirmation signal is generated after the operation confirmation is completed .

The signature generation module 25 is used to sign the smart contract NSC to be signed by using the private key PRK stored in the hardware wallet storage module 22 to form a signed smart contract SSC after receiving the operation confirmation signal. At this time, the signature generation module 25 can transmit the signed smart contract SSC to the blockchain 200 via the mobile electronic device 1 for transaction confirmation, and can also store the signed smart contract SSC to the hardware wallet storage module twenty two.

As can be seen from the above description, the above-mentioned transaction confirmation operation interface 24 and signature generating module 25 are all generated after the hardware electronic wallet 2 executes the hardware electronic wallet application program 21, more specifically, the hardware electronic wallet The wallet 2 is generated after executing the corresponding main program and sub-program in the hardware electronic wallet application program 21 .

It can be seen from the above description that in the NFT transaction confirmation system provided by the present invention, the private key PRK and the public key PUK are stored in the hardware electronic wallet 2 and the mobile electronic device 1 respectively. The entire transaction confirmation process can be roughly divided into two stages. The main work of the first stage is based on the NFT to be traded (that is, the NFT N2 in the above-mentioned embodiment) and the transaction object bit input by the user 300 on the mobile electronic device 1 . The address TA generates the smart contract NSC to be signed, and searches out the NFT image file SNF to be traded; the second stage is to display the NFT image file SNF to be traded and the address TA of the transaction object in the hardware electronic wallet for the user 300 to carry out The operation generates a signed smart contract SSC for transaction confirmation.

Because in the first stage, the private key PRK will not be used at all, and the hardware electronic wallet 2 will not be communicated with the mobile electronic device 1, only in the second stage will the hardware electronic wallet 2 be connected via short The remote communication means is communicatively connected to the mobile electronic device 1, so the risk of the private key PRK being leaked or stolen can be effectively reduced. In addition, when the user uses the hardware electronic wallet 2 to sign the smart contract NSC to be signed in the second stage, he can directly view the NFT image file SNF and the address TA of the transaction object in the hardware electronic wallet 2. It is not necessary to operate and watch the mobile electronic device 1 at the same time, but also obtain the complete information and complete the signature, thereby greatly improving the convenience of operation and greatly reducing the risk of false signature.

Through the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the patent application for the present invention.

100: NFT transaction confirmation system

1:Mobile electronic device

11:Software e-wallet application

12:Software wallet storage module

13: Software electronic wallet

131: Software electronic wallet operation interface

132:Smart contract processing module

1321:Smart contract search unit

1322: Smart contract generation unit to be signed

133: NFT Image File Search Module

2: Hardware electronic wallet

21: Hardware e-wallet application

22: Hardware wallet storage module

23: Display

24: Transaction confirmation operation interface

25: Signature generation module

200: Blockchain

300: user

PRK: private key

PUK: public key

N1~N3:NFT

NF1~NF3: NFT image file

SNF: NFT image file to be traded

SC1~SC3: standard smart contract

NSC: smart contract to be signed

SSC: signed smart contract

TA: transaction object address

The first figure is a functional block diagram showing the transaction confirmation system of the non-homogeneous token certificate provided by the preferred embodiment of the present invention before the operation of the block chain; The second figure shows the functional block diagram of the preferred embodiment of the present invention after the first stage of operation; and The third figure shows the functional block diagram of the preferred embodiment of the present invention after the second stage of operation.

100: NFT transaction confirmation system

1:Mobile electronic device

11:Software e-wallet application

12:Software wallet storage module

13: Software electronic wallet

131: Software electronic wallet operation interface

132:Smart contract processing module

1321:Smart contract search unit

1322: Smart contract generation unit to be signed

133: NFT Image File Search Module

2: Hardware electronic wallet

21: Hardware e-wallet application

22: Hardware wallet storage module

23: Display

24: Transaction confirmation operation interface

25: Signature generation module

200: Blockchain

300: user

PRK: private key

PUK: public key

N1~N3:NFT

NF1~NF3: NFT image files

SNF: NFT image file to be traded

SC1~SC3: standard smart contract

NSC: smart contract to be signed

SSC: signed smart contract

TA: transaction object address

Claims (7)

A transaction confirmation system for non-homogeneous token certificates, which is communicatively linked to a block chain, which stores at least one non-fungible token certificate (Non-Fungible Token; NFT), at least one corresponding to the The NFT image file of at least one NFT, and at least one standard smart contract used to regulate the at least one NFT. The transaction confirmation system of the NFT includes: A mobile electronic device, which is used to communicate with the block chain, installs a software electronic wallet application program, stores a public key, and has a software electronic wallet after executing the software electronic wallet application program using the public key , and the software e-wallet contains: A software electronic wallet operation interface for a user to input one of the at least one NFT as an NFT to be traded, and for the user to input an address of a traded party; A smart contract processing module, which is used to search for one of the at least one standard smart contract in the blockchain to standardize one of the NFTs to be traded as a standby according to the input NFT to be traded A standard smart contract is further used to generate a smart contract to be signed based on the NFT to be traded, the address of the transaction object and the standard smart contract to be used; and An NFT image file search module is used to use the public key and the NFT to be traded to search for an NFT image file to be traded corresponding to the NFT to be traded from the at least one NFT image file in the blockchain ;as well as A hardware electronic wallet is installed with a hardware electronic wallet application program, stores a private key, has a display, and is used to communicate with the mobile electronic device to retrieve the NFT image file to be traded and the address of the transaction object With the smart contract to be signed, the display plays the NFT image file to be traded and displays the address of the transaction object. The hardware electronic wallet generates after executing the hardware electronic wallet application: A transaction confirmation operation interface, which is used to generate an operation confirmation signal for the user to operate and confirm after the user confirms that the NFT image file to be traded and the address of the transaction object displayed on the display are correct; and A signature generation module is used to sign the smart contract to be signed with the private key after receiving the operation confirmation signal to form a signed smart contract, and to use the signed smart contract The contract is transmitted to the blockchain via the mobile electronic device for transaction confirmation. The transaction confirmation system for non-homogeneous token certificates as described in Claim 1, wherein the smart contract processing module further includes a smart contract search unit, and the smart contract search unit is based on the NFT to be traded from the at least one A standard smart contract for standardizing the NFT to be traded is found in the standard smart contract of NFT. The transaction confirmation system for non-homogeneous token certificates as described in claim 2, wherein the smart contract processing module further includes a smart contract generation unit to be signed, and the smart contract generation unit to be signed is used to A link path of the NFT to be traded and the address of the transaction object are written into the standby standard smart contract and the standby standard smart contract is rewritten into the pending smart contract to generate the pending smart contract. The transaction confirmation system for non-homogeneous token certificates as described in Claim 1, wherein, the mobile electronic device further has a software wallet storage module, and the software wallet storage module is used to store the public key and the The standby standard smart contract found by the smart contract processing module. The transaction confirmation system for non-homogeneous token certificates as described in Claim 1, wherein the hardware electronic money includes a hardware wallet storage module for storing the private key and the signed smart contract. The transaction confirmation system for non-homogeneous token certificates as described in Claim 1, wherein the hardware electronic wallet is used to communicate with the mobile electronic device by using a short-distance communication means, and the short-distance communication means is It is a bluetooth communication means or a near-field wireless communication (Near-field communication, NFC) means. The transaction confirmation system for non-homogeneous token certificates as described in Claim 1, wherein the mobile electronic device is a smart phone or a tablet computer.

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