WO2021129002A1 - Dual-chain supply chain transaction system based on utxo model - Google Patents

Abstract

Disclosed is a dual-chain supply chain transaction system based on a UTXO model; a plurality of enterprise nodes are provided with logistics nodes and capital flow nodes; when a transaction occurs between enterprise nodes, using a UTXO model to respectively construct a capital chain and a logistics chain in order to generate corresponding logistics transaction information and capital transaction information; and making the logistics transaction and the capital transaction between the enterprise nodes respectively form two mutually independent transaction chains, the logistics transaction information and the capital transaction information being linked by means of the same transaction number; the present dual-chain supply chain transaction system is conducive to improving the synthesising efficiency of a traceability chain.

Description

A dual-chain supply chain transaction system based on UTXO model Technical field

The invention relates to the field of block chains, in particular to a double-chain type supply chain transaction system based on a UTXO model.

Background technique

In recent years, blockchain has become a hot topic in society. It creates a credible decentralized data storage mechanism by integrating technologies such as peer-to-peer transmission, distributed data storage, consensus mechanism, and encryption algorithm. Effectively solve the fraudulent behavior of data in the process of data circulation in the system in the traditional transaction model, which is conducive to building a transparent, credible and efficient business transaction environment.

Due to the participation of multiple parties in the supply chain, the high cost of trust among members is considered to be the best landing scenario for blockchain. At present, most of the supply chain transaction systems designed based on blockchain are deployed in a consortium chain. The supply chain transaction information is stored through the traditional account model, and the central node is used to control access rights to achieve the purpose of protecting user privacy information.

However, the technical shortcomings of the existing supply chain transaction system solutions are as follows:

1. To rely too much on centralized authority control nodes, and the members of the supply chain alliance do not actually own the ownership of their own transaction data, and there is a certain security risk.

2. Commodity transaction information and capital transaction information are packaged in one transaction, which makes it difficult to separate money and goods, and the distinction between regulatory authority has become complicated.

3. Although the traceability function can be achieved through traceability codes or batches at the application level, the efficiency of synthesizing traceability chains is very low when the transaction volume is large.

Summary of the invention

The purpose of the present invention is to provide a dual-chain supply chain transaction system based on the UTXO model to solve the above problems. On the one hand, it provides companies on the supply chain with strict privacy protection strategies, so that the ownership of transaction data can truly return to the company’s On the other hand, on the other hand, the information of the goods and funds in the transaction is effectively and clearly separated and independently managed, so as to better meet the needs of enterprises and regulatory authorities.

In order to solve the above technical problems, the present invention is implemented based on the following technical solutions:

A dual-chain supply chain transaction system based on UTXO model, including:

Multiple enterprise nodes, the enterprise nodes are deployed with logistics nodes and capital flow nodes; the logistics nodes of the multiple enterprise nodes are constructed into a logistics chain using the UTXO model, and the capital flow nodes of the multiple enterprise nodes are based on the UTXO model Constructed into a capital chain; when a transaction occurs between the two enterprise nodes, logistics transaction information and capital transaction information are generated; the capital transaction information includes UXTO for indicating the source and destination of funds; the logistics transaction information includes useful information UXTO to indicate the source and destination of the goods;

The logistics transaction information is released in the logistics chain, and the capital transaction information is released in the capital chain; the logistics transaction information and the capital transaction information are linked by the same transaction ticket number.

Compared with the prior art, the beneficial effects of the present invention are:

The present invention discloses a dual-chain supply chain transaction system based on the UTXO model. By using the UTXO model to construct a capital chain and a logistics chain, the logistics transactions and capital transactions of enterprise nodes are split to obtain two independent transactions. On the one hand, it provides a strict privacy protection strategy for enterprises in the supply chain, and allows the ownership of transaction data to truly return to the hands of the enterprise. On the other hand, the generated logistics chain and the capital chain are connected through the transaction number. Effective and clear separation and independent management of the information of the goods and funds in the transaction, so as to better meet the needs of enterprises and regulatory authorities. At the same time, the use of the UTXO model achieves natural traceability from the underlying data structure level and greatly improves the traceability chain Synthesis efficiency.

Further, it further includes: a quality supervision node, which is used to supervise the logistics chain formed by the logistics nodes of a plurality of the enterprise nodes; and a fund supervision node, which is used to supervise the The capital chain formed by the capital flow node is supervised.

Through the above settings, the role of the supervision node is divided into the fund supervision node and the quality supervision node, and the information of the fund chain and the logistics chain are separately supervised, so as to further provide different supervision departments with the data that they focus on and are within their authority. The supervisory authority ensures data security while supervising.

Further, it also includes a statistics node, which is connected to the logistics chain and the capital chain for information statistics.

Further, the logistics transaction information and the capital transaction information both include the same transaction ticket number; the transaction ticket number is not encrypted when it is released in the logistics chain; the transaction ticket number is released in the capital The two enterprise nodes that are transacted in the chain time are encrypted by the transaction ticket number encryption key exchanged by the DH algorithm when the transaction is generated.

Through the above settings, the two parties in the transaction obtain the key through the DH key exchange algorithm, store the unencrypted transaction number in the logistics chain, and store the encrypted transaction number in the capital chain, so only the two parties in the transaction can establish commodities through the key The association between the transaction and the fund transaction restores the complete information of the transaction order.

Further, the logistics transaction information includes the transaction order number, the type of goods, the identification code of the goods, one or more input logistics UTXO and one or more output logistics UTXO; the goods category is used to indicate the commodity category of the goods The goods identification code is used to indicate the batch or single product traceability code of the goods; the input logistics UTXO includes the quantity of goods input and the goods importer; the output logistics UTXO includes the quantity of goods exported and the receiver of the goods, the goods The output quantity must be equal to the input quantity of the goods; the output logistics UTXO is locked by the smart contract on the logistics chain when the transaction is generated, and unlocked after the transaction is confirmed.

Further, the fund transaction information includes the transaction ticket number, one or more input fund UTXO and one or more output fund UTXO; the input fund UTXO includes the amount of fund input and the fund input person; the output fund UTXO includes the amount of fund output and the recipient of the fund; the amount of fund output is equal to the amount of fund input; the output fund UTXO is locked by the smart contract of the fund chain when the transaction is generated, and unlocked when the transaction is confirmed.

Further, the two enterprise nodes generate a capital flow key pair and a logistics key pair each time a transaction is generated, and the capital flow key pair includes two capital flow keys stored in the two enterprise nodes, respectively. The logistics key pair includes two logistics keys stored in the two enterprise nodes; each capital flow key includes a capital flow public key and a capital flow private key; each logistics key includes a logistics public key Key and logistics private key; the capital flow public key is used as the output address of the output capital UTXO; the logistics public key is used as the output address of the output logistics UTXO; the capital flow private key is used as unlocking the output capital UTXO The certificate; the logistics private key is used as a certificate for unlocking the output logistics UTXO.

Further, the capital flow public key and the stored information of the enterprise node are backed up to the capital supervision node; the logistics public key and the stored information of the enterprise node are backed up to the quality supervision node. By reporting the public key to the supervisory node, the supervisory node can save the correspondence between the public key and the enterprise, so as to facilitate subsequent decryption of the identity of the transaction subject on the chain.

Further, the goods identification code in the logistics transaction information is used to indicate the minimum traceability granularity of the commodity; when a transaction occurs between the two enterprise nodes, if there are multiple commodities with the minimum traceability granularity in a single transaction, the corresponding The multiple logistics transaction information; the multiple logistics transaction information all include the same transaction ticket number.

Through this setting, when the transaction is generated, the enterprise node in the logistics chain does not pack all the commodity information of a transaction order into a transaction, but splits it into multiple transactions according to the smallest granularity of commodity circulation, and then divides the transaction order number into multiple transactions. Linking transactions, this method can achieve accurate traceability of one item and one code.

Further, a commodity category dictionary is set in the quality supervision node; the commodity category dictionary is used to indicate the commodity category corresponding to the commodity category, and the setting of the commodity category dictionary is convenient for the enterprise node to call and query.

Description of the drawings

FIG. 1 is a schematic diagram of the system architecture of a dual-chain supply chain transaction system based on the UTXO model described in an embodiment of the present invention.

Fig. 2 is a schematic diagram of the logistics chain and the capital chain described in the embodiment of the present invention being connected through a transaction number.

Fig. 3 is a schematic diagram of a specific work process described in an embodiment of the present invention.

Fig. 4 is a schematic diagram of the transaction information query process described in the embodiment of the present invention.

Detailed ways

In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from the description herein, and those skilled in the art can make similar popularizations without violating the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and drawings.

This embodiment discloses a dual-chain supply chain transaction system based on the UTXO model, which is deployed in a consortium chain. Upstream and downstream enterprises in the supply chain and supervisory departments form a blockchain consortium. The supervisory nodes are divided into quality supervisory nodes. There are two types of nodes and fund supervision nodes, and the rest of the enterprises are regarded as ordinary nodes. When a new enterprise node joins, it needs to provide corresponding certification materials, and the relevant supervisory department on the supervisory node will approve it.

As shown in Figure 1, the basic architecture of this system includes multiple enterprise nodes, quality supervision nodes, capital supervision nodes and statistical nodes.

Specifically, each enterprise node is deployed with a logistics node and a capital flow node. Specifically, the logistics nodes of multiple enterprise nodes form a logistics chain, and the capital flow nodes of multiple enterprise nodes form a capital chain. Through this setting, each enterprise joining the alliance needs to deploy two independent nodes: logistics node and capital flow node. These nodes are connected separately and constructed to form a logistics chain and a capital chain using the UTXO model. The information stored in the logistics chain is a record of commodity transactions between enterprises that does not contain the amount, and the capital chain only stores the records of capital transactions between enterprises. The authorized statistical agency, that is, the statistical node, can perform macro-statistics on the data in the logistics chain and the capital chain. The dual-chain design can effectively separate funds and cargo information, thereby better meeting the needs of enterprises and supervision.

Specifically, the quality supervision node is used to supervise the logistics chain formed by the logistics nodes of multiple enterprise nodes; the capital supervision node is used to supervise the capital chain formed by the capital flow nodes of multiple enterprise nodes. Statistics nodes are connected to the logistics chain and capital chain for information statistics.

Specifically, when a transaction occurs between two enterprise nodes, logistics transaction information and capital transaction information are generated; specifically, logistics transaction information is published in the logistics chain, and capital transaction information is published in the capital chain; logistics transaction information and funds Transaction information is contacted through the same transaction ticket number.

Specifically, the logistics transaction information and the capital transaction information both include the same transaction order number. Specifically, the transaction order number is not encrypted when it is released on the logistics chain, and the transaction order number is released on the capital chain for the two companies that are transacted. When the transaction is generated, the node uses the transaction ticket encryption key exchanged by the DH algorithm to encrypt it.

Specifically, the transactions on the logistics chain and the capital chain adopt the UTXO model, that is, each transaction has its input, and the remaining inventory on the logistics chain or the balance on the capital chain comes from the unspent transaction output of the user.

Specifically, the logistics transaction information includes transaction number, cargo category, cargo identification code, one or more input logistics UTXO and one or more output logistics UTXO; the cargo category is used to indicate the commodity category of the cargo; the cargo identification code is used to Indicate the batch or single product traceability code of the goods; the input logistics UTXO includes the quantity of goods input and the importer of the goods; the output logistics UTXO includes the quantity of goods output and the receiver of the goods, the output quantity of goods must be equal to the quantity of goods input; the output logistics UTXO is generated in the transaction Time is locked by the smart contract on the logistics chain and unlocked after the transaction is confirmed. Specifically, a commodity category dictionary is set in the quality supervision node; the commodity category dictionary is used to indicate the commodity category corresponding to the commodity category.

Further, the goods identification code in the logistics transaction information is used to indicate the minimum traceability granularity of the commodity; when a transaction occurs between two enterprise nodes, if there are multiple commodities with the minimum traceability granularity in a single transaction, multiple corresponding logistics are generated Transaction information; multiple logistics transaction information includes the same transaction number.

Specifically, the fund transaction information includes the transaction ticket number, one or more input fund UTXO and one or more output fund UTXO; the input fund UTXO includes the amount of fund input and the fund input person; the output fund UTXO includes the amount of fund output and the fund receiving People; the amount of fund output is equal to the amount of fund input; the output fund UTXO is locked by the smart contract of the fund chain when the transaction is generated, and unlocked when the transaction is confirmed.

Specifically, the specific technical details of the above-mentioned logistics transaction information and capital transaction information are explained through a specific example of the information setting of the logistics chain and the capital chain. In a preferred embodiment, the relationship between the logistics chain and the capital chain The connection of is shown in Figure 2. The logistics transaction information in a specific logistics chain transaction contains the following core fields:

Transaction Number: The code that identifies the transaction.

Commodity code: refers to the unique code that marks the commodity category. Specifically, a public dictionary should be maintained at the quality supervision node for ordinary nodes to call.

Identification code: refers to the unique identifier that marks the product batch or single product traceability code.

Transaction number: the unique code generated when confirming the transaction. Preferably, this embodiment does not pack all the commodity information of a transaction order into one transaction, but splits it into multiple transactions according to the smallest granularity of commodity circulation (batch, traceability code), and then divides the transaction order number into multiple transactions. Linked transactions. For example, if the transaction ticket number 1111 contains 100 products with different traceability codes, 100 transactions will be generated, and the transaction ticket number of each transaction is 1111.

Input UTXO: The UTXO of the source of this transaction can only be left without input if the product is produced in the warehouse or the upstream has not joined the alliance.

Output UTXO: The destination of the transaction, including the quantity and recipient. The sum of the output quantity must be equal to the sum of the input quantity, and the recipient is encrypted by the public key of the quality supervision node. When the goods have reached the end of the supply chain (such as retail), the recipient can be marked as [end customer], and when the goods are lost, the recipient can leave it empty.

In this preferred embodiment, the fund transaction information of the fund chain transaction contains the following core fields

Transaction number (encryption): the unique code generated when confirming the transaction, encrypted by the key exchanged by both parties to the transaction.

Input UTXO: UTXO from the source of the transaction. The digital currency on the capital chain can be transferred in by 1:1 conversion of physical currency, or generated through internal mechanisms such as mining.

Output UTXO: The destination of the transaction, including the quantity and the recipient. The sum of the output quantity must be equal to the sum of the input quantity, and the recipient is encrypted by the public key of the fund supervision node.

The supply chain transaction system disclosed in this embodiment also takes into account transaction privacy in the supply chain. Specifically, transaction privacy in the supply chain can be divided into two aspects: channel confidentiality and commodity transaction price confidentiality.

Among them, channel confidentiality means that the identities of both parties to the transaction are kept secret from other companies, but the supervisory authority has the right to know the identities of upstream and downstream companies to restore the traceability chain, and the confidentiality of commodity transaction prices means that only both parties to the transaction can obtain the contract amount corresponding to the commodity transaction or a certain transfer Corresponding commodity transaction details. In the case of separation of logistics transactions and capital transactions, it is actually the ability to restore complete transaction order information after associating logistics transactions with capital transactions.

The privacy policy of this supply chain transaction system to achieve channel secrecy is as follows:

When transactions are carried out upstream and downstream, the enterprise nodes of both parties of the transaction generate 2 pairs of keys each time. The 2 public keys are used as the output addresses for commodity transactions and fund transactions, and the 2 private keys are used as vouchers for unlocking the logistics chain and the capital chain UTXO. . While the key is being generated, the public key needs to be reported to the quality and capital supervision nodes for filing. In this way, the identities of both parties to the transaction can be made anonymous to other nodes and made public to supervisory nodes.

Specifically, the privacy policy of this supply chain transaction system to realize the confidentiality of commodity transaction prices is as follows:

The logistics chain and the capital chain are related to each other through the "transaction order number". When conducting a transaction, the two companies will first obtain a key that only the two parties know through the DH key exchange algorithm, and publish the transaction information to the logistics separately On the chain and the capital chain, the transaction ticket number stored on the logistics chain is not encrypted, and the transaction ticket number on the capital chain is encrypted with a key through a symmetric encryption algorithm. At this time, only the parties to the transaction can establish the transaction through the exchanged key and transaction ticket number. Begin logistics transactions and capital transactions.

Specifically, two enterprise nodes generate a capital flow key pair and a logistics key pair each time a transaction is generated. The capital flow key pair includes two capital flow keys stored in the two enterprise nodes; the logistics key pair Including two logistics keys stored in two enterprise nodes; each capital flow key includes a capital flow public key and a capital flow private key; each logistics key includes a logistics public key and a logistics private key; among them:

The capital flow public key is used as the output address of the output capital UTXO; the logistics public key is used as the output address of the output logistics UTXO; the capital flow private key is used as the voucher for unlocking the output capital UTXO; the logistics private key is used as the voucher for unlocking the output logistics UTXO. Further, the capital flow public key and the stored information of the enterprise node are backed up to the fund supervision node; the logistics public key and the stored information of the enterprise node are backed up to the quality supervision node.

Referring to Figure 3, the following will take the transaction between seller A and buyer B as an example to describe the workflow of the present invention:

1. The initiator of the transaction can be either the buyer or the seller. When a buyer initiates a transaction, A initiates an order form to B, and B confirms it; when a seller initiates a transaction, B publicly releases a sales order, and A claims it. All operations in this process only exist at the application level and do not interact with the blockchain.

2. After the two parties have reached a transaction confirmation, the confirmed party will generate a unique transaction ticket number.

3. A and B respectively generate two pairs of asymmetric keys, namely (A1,A1') and (A2,A2') and (B1,B1') and (B2,B2'), and exchange public keys A1, A2 , B1, B2, and report A1, B1 to the quality supervision node, and A2, B2 to the fund supervision node. Specifically, the supervisory node saves a corporate-public key address mapping table for decrypting the identity of the transaction subject on the chain.

4. A and B obtain a key C1 shared by both parties through the DH key exchange algorithm, and encrypt the transaction number.

5. Transfer B's transaction funds UTXO to the smart contract, and at the same time pass in the encrypted transaction ticket number. At this time, these UTXOs are locked and neither A nor B can be used.

6. Transfer the UTXO of A's goods to the smart contract, and at the same time, pass in the unencrypted tracking number, transaction product code, product identification code and quantity. At this time, these UTXOs are in a locked state, and neither A nor B can be used.

7. When B confirms the receipt of the goods, it calls the smart contract of the logistics chain to generate a commodity transaction, and outputs the corresponding transaction quantity in the UTXO input by A to address B1, and "change" to address A1 if there is any remaining.

8. After the logistics transaction is confirmed, the smart contract of the capital chain is called to generate a capital transaction, and the corresponding transaction quantity in the UTXO input by B is output to address A2, and if there is surplus, "change" to address B2.

9. If B does not confirm the receipt, A agrees to terminate the transaction. At this time, the smart contract is called to unlock the UTXO of A and B. If A does not agree to terminate the transaction, an authority must intervene in coordination. Specifically, in the smart contract Reserve the channel through which the supervisory node intervenes. The supervisory node collects the evidence from both parties and decides the owner of the funds and goods, and then invokes the smart contract for execution.

With reference to Figure 4 below, when a user needs to query the transaction details of a certain number, the process of querying transaction information in the above-mentioned public supply chain management system is described:

1. If the user needs to query the transaction order details of a certain kind, a certain batch or a certain traceability code, first query the eligible transaction order number on the logistics chain according to the product code and identification code. The transaction ticket number is encrypted by the exchanged secret key C1, and the fund transaction corresponding to the ticket number is queried on the fund chain.

2. If the user needs to query the transaction order details corresponding to a certain fund income and expenditure, first find the transaction order number corresponding to the transaction. The transaction ticket number is decrypted by the exchanged secret key C1, and all transactions corresponding to the ticket number are queried on the logistics chain.

3. Finally, combine the commodity transaction information and capital transaction information to restore the complete transaction order information.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in the embodiments disclosed in the embodiments of the present invention can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention.

In the embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-viewable storage medium. Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The preferred embodiments of the present invention are described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and changes according to the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should fall within the protection scope determined by the claims.

Claims (10)

A dual-chain supply chain transaction system based on the UTXO model, which is characterized in that it includes: Multiple enterprise nodes, the enterprise nodes are deployed with logistics nodes and capital flow nodes; the logistics nodes of the multiple enterprise nodes are constructed into a logistics chain using the UTXO model, and the capital flow nodes of the multiple enterprise nodes are based on the UTXO model Constructed into a capital chain; when a transaction occurs between the two enterprise nodes, logistics transaction information and capital transaction information are generated; the capital transaction information includes UXTO for indicating the source and destination of funds; the logistics transaction information includes useful information UXTO to indicate the source and destination of the goods; The logistics transaction information is released in the logistics chain, and the capital transaction information is released in the capital chain; the logistics transaction information and the capital transaction information are linked by the same transaction ticket number. The dual-chain supply chain transaction system based on the UTXO model according to claim 1, characterized in that it further comprises: The quality supervision node is used to supervise the logistics chain formed by the logistics nodes of the multiple enterprise nodes; The fund supervision node is used to supervise the fund chain formed by the fund flow nodes of the multiple enterprise nodes. The dual-chain supply chain transaction system based on the UTXO model according to claim 1, further comprising a statistical node connected to the logistics chain and the capital chain for information statistics. The dual-chain supply chain transaction system based on the UTXO model of claim 2, wherein the logistics transaction information and the capital transaction information both include the same transaction number; The transaction ticket number is not encrypted when it is released in the logistics chain; The transaction ticket number is encrypted by the transaction ticket number encryption key exchanged by the DH algorithm when the transaction is generated by the two enterprise nodes that are transacted when the transaction ticket number is issued on the capital chain. The dual-chain supply chain transaction system based on the UTXO model according to claim 4, wherein the logistics transaction information includes the transaction order number, goods category, goods identification code, one or more input logistics UTXO And one or more export logistics UTXO; The cargo category is used to indicate the commodity category of the cargo; The cargo identification code is used to indicate the batch or single product traceability code of the cargo; The input logistics UTXO includes the quantity of goods imported and the person who imports the goods; The output logistics UTXO includes the quantity of goods output and the recipient of the goods, and the quantity of goods output must be equal to the quantity of goods input; the output logistics UTXO is locked by the smart contract on the logistics chain when the transaction is generated, and is in the transaction Unlock after confirmation. The dual-chain supply chain transaction system based on the UTXO model of claim 5, wherein the fund transaction information includes the transaction ticket number, one or more input funds UTXO, and one or more output funds UTXO; The input capital UTXO includes the amount of capital input and the person who inputs the capital; The output fund UTXO includes the amount of fund output and the fund recipient; the amount of fund output is equal to the amount of fund input; the output fund UTXO is locked by the smart contract of the fund chain when the transaction is generated, and unlocked when the transaction is confirmed. The dual-chain supply chain transaction system based on the UTXO model according to claim 6, wherein the two enterprise nodes generate a capital flow key pair and a logistics key pair each time a transaction is generated, and the capital The flow key pair includes two capital flow keys respectively stored in the two enterprise nodes; the logistics key pair includes two logistics keys stored in the two enterprise nodes respectively; Each capital flow key includes a capital flow public key and a capital flow private key; each logistics key includes a logistics public key and a logistics private key; The capital flow public key is used as the output address of the output capital UTXO; the logistics public key is used as the output address of the output logistics UTXO; The capital flow private key is used as a voucher for unlocking the output capital UTXO; the logistics private key is used as a voucher for unlocking the output logistics UTXO. The dual-chain supply chain transaction system based on the UTXO model according to claim 5, characterized in that: The capital flow public key and the stored enterprise node information are backed up to the capital supervision node; the logistics public key and the stored enterprise node information are backed up to the quality supervision node. The dual-chain supply chain transaction system based on the UTXO model of claim 5, wherein the goods identification code in the logistics transaction information is used to indicate the minimum traceability granularity of the goods; When a transaction occurs between two enterprise nodes, if there are multiple commodities with the smallest traceability granularity in a single transaction, multiple corresponding logistics transaction information is generated; the multiple logistics transaction information all include the same transaction order number. The dual-chain supply chain transaction system based on the UTXO model according to claim 6, wherein a commodity category dictionary is set in the quality supervision node; the commodity category dictionary is used to indicate the corresponding goods category Product category.

Images