CN108805585A - Distributed commodity data storage system, circulation and source tracing method based on block chain - Google Patents

Abstract

The invention discloses a blockchain-based distributed commodity data storage system, circulation and traceability method, and relates to the field of data traceability; the system is deployed in the form of an alliance chain, including multiple super nodes and multiple ordinary nodes; the invention solves the problem of It solves the problem of opaque transaction data in the current commodity production and circulation chain, and uses the non-tamperable characteristics of the blockchain to reduce the trust friction between enterprises and between enterprises and regulatory authorities; it solves the problem of high storage pressure on centralized traceability platforms The problem is to disperse and store the detailed information of the production and circulation links in the database of each enterprise node, and at the same time ensure that these data will not be tampered with by the enterprise through the hash code; it solves the problem of incomplete traceability data in the supply chain and the difficulty of locating responsibility. Code as the core combined with box code association, mobile payment and other means to record all information in the entire life cycle, quickly locate the responsible party when a quality problem occurs, and issue a recall notice to relevant enterprises and consumers.

Description

Blockchain-based distributed commodity data storage system, circulation and traceability method

technical field

The invention relates to the field of data traceability, in particular to a blockchain-based distributed commodity data storage system, circulation and traceability method.

Background technique

With the deepening of the global division of labor, the production and circulation chains of modern commodities are continuously extended, and they are characterized by fragmentation, complexity, and geographical decentralization, which brings great challenges to supply chain management, production and circulation supervision, and product traceability. . This status quo has led to the opacity and information asymmetry of the production and distribution chain, which has caused distrust and friction among the members of the chain. In addition, the production and circulation chain of products involves a wide range of areas, and the supervision is weak. The public lacks a reliable way to verify the quality and source of goods. In response to this situation, there are currently two approximate solutions:

Option One:

The government establishes a commodity traceability platform, which requires enterprises in the jurisdiction to report production and circulation data on a regular basis and store them centrally in the government's data center. When you need to query the traceability information of a commodity, you can directly retrieve the relevant record combination according to the batch or production date of the commodity Form a traceability chain.

Option II:

Large-scale enterprises build their own commodity traceability systems and require upstream and downstream cooperative enterprises to cooperate with them. The traceability system registers a unique traceability code for each product, and binds information such as raw material batches, circulation chains, and temperature and humidity during transportation to the traceability code by scanning the code in the production and circulation link. Consumers can scan the code Identify the authenticity of the product, and understand the detailed traceability data in the production and distribution process of the product.

The technical disadvantages of the above scheme are as follows:

1. There is no guarantee that the data will not be tampered with, and it is difficult to verify the authenticity of the traceable data;

2. When a problem occurs, it is difficult to locate the responsible party, and it is often encountered that the responsible party shirks the blame and cannot provide evidence;

3. There is an "information island" problem in the traceability code, and the uniqueness of the traceability code cannot be guaranteed, and the production enterprise can generate a large number of identical traceability codes;

4. The construction cost of the centralized traceability platform is high and requires a large amount of data storage space;

5. The ability to resist attacks is weak. Once the central server is hacked, the entire system will be paralyzed;

6. The product tracking chain has not reached the terminal consumers, and it is difficult to recall when there is a quality problem.

Contents of the invention

The present invention provides a blockchain-based distributed commodity data storage system, circulation and traceability method. Aiming at the above technical deficiencies, the idea of blockchain and distributed data storage is introduced. By organically integrating supervision departments, industry associations, production The data resources of enterprises and circulation enterprises establish a blockchain alliance traceability system, and all parties in the entire supply chain from raw materials to retailers participate in the information entry and maintenance of the blockchain to ensure real-time, orderly, authentic and unforgeable data . Achieve forward traceability, reverse traceability, and risk control. When quality and safety problems occur, products can be recalled, reasons can be found out, and responsibilities can be held accountable. Realize the responsibility of quality and safety subjects, and build a trustworthy, transparent, and efficient collaborative distributed system. Industry alliance ecology.

In order to achieve the above object, the present invention proposes a blockchain-based distributed commodity data storage system, including a plurality of super nodes and a plurality of ordinary nodes;

The super node: used to approve the qualifications of new members of the alliance in the blockchain and verify the legitimacy of transactions submitted by members, store the basic data of ordinary nodes in the blockchain and generate information reported by ordinary nodes based on key control links hash code and maintain an unencrypted ledger for generating traceability chains;

When there is a traceability request, it is also used to verify the consistency between the stored hash code and the hash code corresponding to the key control link information reported by ordinary nodes at this time, and the key control link information and the traceability chain form complete commodity traceability information;

The above-mentioned ordinary nodes: have the authority to obtain and verify the data information of the entire block chain, view their own transaction records through the secret key, add new transaction data to the block chain after being verified by the super node, and also according to the requirements of regulations Record the key control link information in the production and circulation link, generate a hash code and report it to the super node;

When there is a traceability request, the recorded key control link information is reported to the super node.

Preferably, the corresponding members of the super nodes include at least government regulatory departments and industry associations; the corresponding members of the ordinary nodes include at least manufacturers, raw material suppliers, distributors and retailers.

Preferably, said super node includes:

Approval module: used to approve the qualifications of new members of the alliance in the blockchain and verify the legitimacy of transactions submitted by members;

Ledger module: used to generate encrypted ledgers based on the transaction records of common nodes, broadcast to the blockchain, and maintain an unencrypted ledger for generating traceability chains;

Storage module: used to store the basic data of ordinary nodes in the blockchain and the hash codes reported by ordinary nodes based on key control link information;

Traceability module: used to receive traceability requests from tracers, splicing them into a traceability chain according to time in the transaction records of the ledger, and verifying the consistency of the stored hash codes with the hash codes corresponding to the key control link information reported by ordinary nodes at this time , and send the key control link information and the traceability chain to form a complete product traceability information to the tracer.

Preferably, the common nodes include:

Data acquisition module: used to acquire and verify the data information in the entire blockchain;

Data reporting module: used to add new block data to the blockchain after verification by super nodes;

Storage module: used to store key control link information;

Hash code generation module: used to generate hash codes based on key control link information and report to super nodes.

Preferably, said common node also includes:

Encrypted signature module: used to encrypt and sign transaction records;

Traceability code and box code generation module: used to generate the traceability code of the product and the box code of the packing box;

Binding module: It is used to scan and bind the box code corresponding to the box and the traceability code corresponding to the goods packed in the box according to the packing situation of the goods.

Preferably, the key control link information at least includes raw material inspection reports of each batch, finished product inspection reports and batch numbers of raw materials used.

The present invention also proposes a distributed commodity circulation method based on block chain, including the following steps:

S10. The ordinary nodes of the production enterprise in the blockchain generate hash codes according to the key control link information, and generate product traceability codes and packing box codes;

S20. The super node in the blockchain saves the hash code and verifies the traceability code and box code;

S30. According to the packing situation of the goods, scan and bind the box code corresponding to the box and the traceability code corresponding to the commodity contained in the box, and store the relationship between the box code and the traceability code in the super node in the blockchain ;

S40. The ordinary nodes of the production enterprise in the blockchain encrypt and sign the transaction records, and the super nodes verify the legitimacy of the verification;

S50. Common nodes of circulation companies in the blockchain scan the box codes to confirm purchases, and super nodes add an encrypted transaction record and broadcast it;

S60. The general node of the retailer in the block chain scans the traceability code of the product sold to generate an order. When the consumer pays, associate the payment account with the traceability code of the product and save it to the super node in the block chain.

The present invention also proposes a distributed commodity traceability method based on block chain, including the following steps:

S100, the tracer scans the traceability code of the product, and initiates a traceability request to the super node;

S200. Search the record for the box code to which the traceability code belongs in the circulation link;

S300. Search the transaction record for the circulation link transaction record corresponding to the box code;

S400. In the transaction records of the circulation link, the super nodes are spliced into a traceability chain according to time;

S500. Query the production enterprise of the product through the traceability code, and initiate a key control link information query request to the common node of the production enterprise;

S600. Report the recorded key control link information to the super node, and the super node checks whether the hash value of the reported information is consistent with the previous record;

S700. Merge the information on key production control links with the traceability chain to form complete commodity traceability information and return it to the tracer.

The present invention provides a block chain-based distributed commodity data storage system, circulation and traceability method, which includes three key contents, namely: block chain, distributed storage, and traceability method; block chain solves the problem of current commodity The problem of opaque transaction data in the production and circulation chain, with the help of the non-tamperable characteristics of the blockchain, ensures the credibility and authority of the data, and reduces the trust friction between enterprises and between enterprises and regulatory authorities; distributed The storage solves the problem of high storage pressure on the centralized traceability platform, and stores the detailed information of the production and circulation links in the database of each enterprise node, and at the same time ensures that these data will not be tampered with by the enterprise through the hash code; finally, the present invention proposes The traceability method solves the problem of incomplete traceability data in the supply chain and difficult positioning of responsibilities. This method takes the traceability code as the core, combines box code association, mobile payment and other means to record all relevant information of the product from raw materials to the entire life cycle of consumers , when a quality problem occurs, the responsible party can be quickly located, and a recall notice can be issued to the relevant enterprises and consumers.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a schematic diagram of the structure of a super node and a common node in the first embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a super node and a common node in the second embodiment of the present invention;

Fig. 3 is a flowchart of a distributed commodity circulation method based on blockchain in the fourth embodiment of the present invention;

Fig. 4 is a flow chart of signal interaction of each node of production and circulation in the fourth embodiment of the present invention;

Fig. 5 is a flow chart of a distributed commodity traceability method based on blockchain in the fifth embodiment of the present invention;

Fig. 6 is a flow chart of signal interaction of each node of commodity traceability in the fifth embodiment of the present invention;

Fig. 7 is a schematic diagram of block data structure of the present invention;

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The present invention provides a distributed commodity data storage system based on block chain; the present invention is deployed in the form of alliance chain, government supervision departments (Quality Supervision Bureau, Food and Drug Administration Bureau, Industrial and Commercial Bureau, Commerce Bureau, etc.) and industry associations It is the super node of the blockchain and has approval authority. Every time a new node is included in the alliance chain, it needs to be unanimously agreed by the super node. Authorized access nodes are called ordinary nodes, which can add new traceability information block data. The newly added data needs to be verified by the super node before it will be officially added to the chain. Once the data is on the chain, it will never be changed. The data on the blockchain is open to all members of the alliance, but because the data is encrypted by the enterprise secret key, each enterprise can only view its own transaction data through the secret key, thus ensuring the security of commercial privacy.

In the first preferred embodiment of the present invention, the system includes a plurality of super nodes (government supervision departments and industry associations) and a plurality of common nodes (manufacturing enterprises, raw material suppliers, dealers and retailers);

The super node: used to approve the qualifications of new members of the alliance in the blockchain and verify the legitimacy of transactions submitted by members, store the basic data of ordinary nodes in the blockchain and generate information reported by ordinary nodes based on key control links hash code, and maintain an unencrypted account book for generating the traceability chain; when there is a traceability request, it is also used to verify that the stored hash code is consistent with the hash code corresponding to the key control link information reported by ordinary nodes at this time Integrity, the key control link information and the traceability chain form a complete commodity traceability information;

In the embodiment of the present invention, the super node is responsible for approving the membership qualifications of new members of the alliance and verifying whether the transactions submitted by members are legal. Each super node saves basic data such as the basic information of the alliance enterprise, commodity category information, commodity traceability code and associated information of the box code. In addition to the encrypted ledger on the public chain, an unencrypted ledger is also maintained on the super node, and the public and regulators will use this ledger to generate a traceability chain when tracing the source. In order to save the storage space of super nodes, the key control link information in the production and circulation links, such as raw material batches, inspection reports, and environmental monitoring data during transportation, etc. Xima, if the enterprise tampers with this information without authorization, the hash code will change.

The ordinary node: used to obtain and verify the data information in the entire block chain, add new block data to the block chain after being verified by the super node, and record the key points in the production and circulation link according to the regulations. Control link information, generate a hash code and report it to the super node; when there is a traceability request, report the recorded key control link information and the generated hash code to the super node.

In the embodiment of the present invention, common nodes are production enterprises, raw material suppliers, distributors, retailers, etc. that join the alliance, all of which belong to common nodes. Ordinary nodes have the authority to obtain and verify the data information of the entire blockchain, but they can only view their own transaction records through the enterprise secret key. Ordinary nodes can add new block data to the chain block, and the new data is confirmed by the super node After that, it is formally added to the blockchain. Ordinary nodes need to record the key control link information in the production and circulation link according to the regulations, and generate a hash code to report to the super node.

In the second preferred embodiment of the present invention, as shown in Figure 1, the super node includes:

Approval module: used to approve the qualifications of new members of the alliance in the blockchain and verify the legitimacy of transactions submitted by members;

Ledger module: used to generate encrypted ledgers based on the transaction records of ordinary nodes, broadcast to the blockchain, and maintain an unencrypted ledger for generating traceability chains;

Storage module: used to store the basic data of ordinary nodes in the blockchain and the hash codes reported by ordinary nodes based on key control link information;

Traceability module: used to receive traceability requests from tracers, splicing them into a traceability chain according to time in the transaction records of the ledger, and verifying the consistency of the stored hash codes with the hash codes corresponding to the key control link information reported by ordinary nodes at this time , and send the key control link information and the traceability chain to form a complete product traceability information to the tracer.

The common nodes mentioned include:

Data acquisition module: used to acquire and verify the data information in the entire blockchain;

Data reporting module: used to add new block data to the blockchain after verification by super nodes;

Storage module: used to store key control link information;

Hash code generation module: used to generate hash codes based on key control link information and report to super nodes.

In the third preferred embodiment of the present invention, as shown in Figure 2, the common node further includes:

Encrypted signature module: used to encrypt and sign transaction records;

Traceability code and box code generation module: used to generate the traceability code of the product and the box code of the packing box;

Binding module: It is used to scan and bind the box code corresponding to the box and the traceability code corresponding to the goods packed in the box according to the packing situation of the goods.

The present invention also proposes a distributed commodity circulation method based on blockchain;

In the fourth preferred embodiment of the present invention, as shown in Figure 3 and Figure 4, the following steps are included:

S10. The ordinary nodes of the production enterprise in the blockchain generate hash codes according to the key control link information, and generate product traceability codes and packing box codes;

In the embodiment of the present invention, the production enterprise formulates a production plan, and produces products according to batches, records key control link information such as raw material inspection reports, finished product inspection reports, and batch numbers of raw materials used for each batch, and generates a Hash code, the super node saves the relationship between the hash code and the production batch; the production enterprise generates a certain number of traceability codes and box codes according to the batch output, and the template of the raw code can be customized by the enterprise;

S20. The super node in the blockchain saves the hash code and verifies the traceability code and box code;

In the embodiment of the present invention, the relationship between the hash code and the production batch is saved, and the uniqueness and legitimacy of the traceability code and the box code are verified;

S30. According to the packing situation of the goods, scan and bind the box code corresponding to the box and the traceability code corresponding to the commodity contained in the box, and store the relationship between the box code and the traceability code in the super node in the blockchain ;

In the embodiment of the present invention, the production enterprise attaches the verified traceability code and box code to the product and the packaging box respectively. It is worth mentioning that the box code may not be associated with the batch, but directly before scheduling Batch production is printed on the box.

The production enterprise packs the goods, and the operation steps are as follows:

①Set the quantity of goods in each box, such as 6;

② Scan the traceability codes of 6 commodities first, and then the system will automatically switch to the box code scanning mode;

③ Scan the box code to complete the binding operation;

④The system automatically switches back to the traceability code scanning mode and continues to scan the next 6 traceability codes.

The whole process does not require any click operation, just keep scanning the code to complete the binding. The relationship between the box code and the traceability code will be saved to the super node.

S40. The ordinary nodes of the production enterprise in the blockchain encrypt and sign the transaction records, and the super nodes verify the legitimacy of the verification.

In the embodiment of the present invention, the production enterprise fills in the sales order, enters information such as customer name, product name, quantity, amount, etc., and scans the code to enter the product box code corresponding to the sales order, and finally encrypts the transaction record through the enterprise private key and signature, the super node first verifies the legitimacy of the transaction.

S50. Common nodes of circulation companies in the blockchain scan the box codes to confirm purchases, and super nodes add an encrypted transaction record and broadcast it;

In the embodiment of the present invention, the distribution company fills in the purchase order, scans the box code to complete the purchase confirmation, and after the transaction is confirmed by both parties, the super node adds an encrypted transaction record on the public blockchain and broadcasts it to the entire network. Note: The attached figure omits the multi-level distribution relationship in the circulation link. In practical applications, the intermediate distributor also needs to fill in the sales order and scan the box code when shipping to the downstream. The specific process is consistent with the sales of the manufacturer.

S60. The general node of the retailer in the block chain scans the traceability code of the product sold to generate an order. When the consumer pays, associate the payment account with the traceability code of the product and save it to the super node in the block chain.

In the embodiment of the present invention, after the product arrives at the terminal retailer and puts it on the shelf for sale, the retailer scans the traceability code of the product selected by the consumer to form an order. If the consumer pays through the mobile terminal, the system will link the payment account with the commodity traceability code If there is a quality problem with the product and needs to be recalled, the supervisory department can find the consumer who bought the problem batch based on these records and issue a reminder.

The present invention also proposes a distributed commodity traceability method based on blockchain,

In the fifth preferred embodiment of the present invention, as shown in Figure 5 and Figure 6, the following steps are included:

S100, the tracer (consumer) scans the traceability code of the product, and initiates a traceability request to the super node;

S200. Search the record for the box code to which the traceability code belongs in the circulation link;

In the embodiment of the present invention, the traceability request will first be sent to the super node, and the super node finds the box code to which the traceability code belongs in the circulation link in the previously recorded traceability code-box code association table;

S300. Search the transaction record for the circulation link transaction record corresponding to the box code;

S400. In the transaction records of the circulation link, the super nodes are spliced into a traceability chain according to time;

S500. Query the production enterprise of the product through the traceability code, and initiate a key control link information query request to the common node of the production enterprise;

S600. Report the recorded key control link information and the generated hash code to the super node for verification, and verify whether the hash value of the information returned by the production enterprise is consistent with the previous record;

S700. Merge the information on key production control links with the traceability chain to form complete commodity traceability information and return it to consumers.

As shown in Figure 7 of the present invention, the block chain organizes data in units of blocks, and a block is a data structure for recording transactions. Each block consists of a block header and a block body. The block header of each block except the genesis block contains the hash code of the previous block, the timestamp generated by the block, and the block generated by the block. A Merkle root for transaction data generation in the body.

The Merkle root is the root node of the Merkle tree. Assuming that there are 8 transaction records in the block body, the construction of the Merkle root is as follows:

1. Perform hash operations on transaction records 1-1 to 1-8;

2. Connect two adjacent transaction records in series, and then do hash operation to get 2-1~2-4;

3. Repeat the second step to get 3-1, 3-2;

4. Repeat the second step to get 4-1, which is the Merkel root.

The block body includes a field for the transaction amount and a list of transaction records. The data fields of the transaction records are designed as follows:

The invention carried out a block chain transformation experiment on the basis of the food traceability platform in Guangdong Province, and obtained the transaction data of the traceability platform in real time through the API, and then encrypted and saved them on the block chain. At present, a food traceability area with 8 nodes has been established The block chain realizes the functions of purchase order, sales order, return order query and product traceability. In the case of 10 million block heights, the block chain APIs support concurrency > 100, and the response time is less than 1 second, which is enough to meet commercial-level transaction frequency.

To sum up, after the transaction records of the present invention are written into the blockchain, they are disclosed to all alliance members. Each node in the alliance keeps a complete ledger, and entries in the ledger can only be added, and cannot be tampered with or deleted. The data in the public account book is encrypted, and the enterprise can only view its own transaction records through the secret key; the key control link information in the production and circulation process is scattered and stored in the enterprise node, and the super node only saves the hash code to verify whether it is encrypted. Tampering; the generation of traceability codes and box codes needs to be verified by super nodes for their uniqueness and legitimacy; the association between box codes and traceability codes is established when packing, and the incoming and outgoing conditions can be recorded by simply scanning the box codes during circulation. When scanning the commodity traceability code, first find the box code of the traceability code in the circulation link through the association table, and then search the transaction records of the circulation link corresponding to the box code in the transaction records of the blockchain, and splicing them into a traceability chain according to time; Improved the operation process associated with the box code and the traceability code. The entire boxing process does not require any click operation, which greatly improves the boxing efficiency; when consumers purchase goods through mobile payment, record the relationship between the product traceability code and the consumer's payment account , when a batch of goods has quality problems, a recall notice can be sent to the corresponding consumers.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (8)

1. a kind of distributed commodity data storage system based on block chain, which is characterized in that including multiple super nodes and more A ordinary node；

The super node：The conjunction for qualification being added and verify member's submission transaction for examining block Lian Zhong alliance newcomers Method, what what the basic data of ordinary node and ordinary node reported in memory block chain generated according to critical control link information Hash codes, and safeguard a unencryption account book for generating chain of tracing to the source；

When trace to the source request when, be additionally operable to the Hash codes of verification storage and ordinary node reports at this time critical control link information Critical control link information and chain of tracing to the source are formed complete commodity and traced to the source information by the consistency of corresponding Hash codes；

The ordinary node：The data information for having permission acquisition and the entire block chain of verification, the friendship of itself is checked by secret key Easily record, adds new transaction data after super node verifies into block chain, and production circulation is recorded also according to laws and regulations requirement Critical control link information in link generates Hash codes and reports in super node；

When trace to the source request when, by the critical control link information reporting of record to super node.

2. the distributed commodity data storage system according to claim 1 based on block chain, which is characterized in that described Super node, corresponding to member include at least government regulator and employer's organization；The ordinary node, corresponding to Member include at least manufacturing enterprise, material supplier, dealer and retailer.

3. the distributed commodity data storage system according to claim 1 based on block chain, which is characterized in that described Super node, including：

Approval module：The legitimacy for qualification being added and verify member's submission transaction for examining block Lian Zhong alliance newcomers；

Account book module：It for generating encryption account book according to the transaction record of ordinary node, and broadcasts into block chain, safeguards simultaneously One unencryption account book for generating chain of tracing to the source；

Memory module：Basic data and ordinary node for ordinary node in memory block chain report according to crucial control ring Save the Hash codes that information generates；

Trace back block：Request of tracing to the source for receiving retrospect person, is spliced into according to time order and function in the transaction record of account book and traces back Source chain verifies the consistent of the Hash codes Hash codes corresponding with the critical control link information that ordinary node at this time reports of storage Property, critical control link information and chain of tracing to the source are formed into complete commodity information of tracing to the source and are sent to retrospect person.

4. the distributed commodity data storage system according to claim 1 based on block chain, which is characterized in that described Ordinary node, including：

Data acquisition module：For obtaining and verifying the data information in entire block chain；

Data reporting module：For new block data to be added into block chain after super node verifies；

Memory module：For storing critical control link information；

Hash codes generation module：For generating Hash codes according to critical control link information and reporting to super node.

5. the distributed commodity data storage system according to claim 1 based on block chain, which is characterized in that described Ordinary node further includes：

Ciphering signature module：For being encrypted and signing to transaction record；

Traceability code and case code generation module：The case code of traceability code and packing case for generating commodity；

Binding module：It is for being cased situation according to commodity, the corresponding case code of packing case and commodity in babinet is corresponding Traceability code carries out barcode scanning binding.

6. the distributed commodity data storage system based on block chain according to claim 1 or 3 or 4, which is characterized in that The critical control link information includes at least the raw material examining report of each batch, finished product detection is reported and uses raw material Batch number.

7. a kind of distributed commodity circulation method based on block chain, which is characterized in that include the following steps：

S10, block Lian Nei manufacturing enterprise's ordinary nodes generate Hash codes according to critical control link information, separately generate commodity tracing Code and packing case case code；

Super node preserves Hash codes and verifies traceability code and case code in S20, block chain；

S30, situation of being cased according to commodity, the corresponding case code of packing case and the corresponding traceability code of commodity in babinet are carried out Barcode scanning is bound, and the incidence relation of case code and traceability code is stored in super node in block chain；

S40, block Lian Nei manufacturing enterprises ordinary node are encrypted and sign to transaction record, the conjunction of super node verification verification Method；

S50, the ordinary node scanning case code determination of block Lian Nei circulation enterprises are stocked up, and super node increases an encrypted transaction newly It records and broadcasts；

Retailer's ordinary node scans sold commodity tracing code and generates order in S60, block chain, when consumer payment, closes Join payment accounts and commodity tracing code and preserves to super node in block chain.

8. a kind of distributed commodity source tracing method based on block chain, which is characterized in that include the following steps：

The traceability code of S100, retrospect person's items scanning initiate retrospect request to super node；

S200, traceability code case code affiliated in intermediate links is inquired in record；

S300, the corresponding intermediate links transaction record of case code is searched in transaction record；

S400, super node are spliced into chain of tracing to the source in intermediate links transaction record according to time order and function；

S500, the manufacturing enterprise that the commodity are inquired by traceability code, and initiate critical control link to manufacturing enterprise's ordinary node Information inquiring request；

S600, by the critical control link information reporting of record to super node, super node verifies the cryptographic Hash for reporting information It is whether consistent with what is recorded before；

S700, production critical control link information is merged with chain of tracing to the source, forms complete commodity and traces to the source information, return To retrospect person.