CN114282929A

CN114282929A - Block chain communication certificate-based rice supply chain digital transaction method

Info

Publication number: CN114282929A
Application number: CN202111475077.0A
Authority: CN
Inventors: 张新; 王小艺; 彭祥贞; 许继平; 赵峙尧; 孔建磊
Original assignee: Beijing Technology and Business University
Current assignee: Beijing Technology and Business University
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-04-05

Abstract

The invention provides a block chain general evidence based rice supply chain digital transaction method, and relates to the fields of block chains, Internet of things and the like. Firstly, designing a digital transaction platform based on an intelligent contract and a block chain technology, forming participants by all enterprises, consumers and supervision departments together, and distributing digital identity representative certificates and digital wallets to the participants after identity authentication; then, the rice asset is certified through the exchange; the participators match the rice general certificate with the identity representative general certificate to form a unique general certificate. The buyer and the seller confirm the layered transaction of the present funds and the rice through respective only communication; the invention realizes interconnection and intercommunication of the sub-chains and the main chain by adopting an asymmetric encryption mode, the designed general evidence ensures the complete credibility of the rice digital transaction environment, simultaneously provides rice tracing and supervision services, and provides a perfect reference and research idea for realizing digital transaction of grain and oil crops.

Description

Block chain communication certificate-based rice supply chain digital transaction method

Technical Field

The invention relates to the fields of new-generation information technologies such as a block chain, the Internet of things and the like, financial digitization, grain safety management and the like, in particular to a block chain general evidence-based rice supply chain digital transaction method.

Background

With the continuous development of agriculture, in 2020, the national rice yield is 4237 billion jin, which is increased by 45 billion jin compared with the last year and is increased by 1.1%. The yield per unit area of China is increased year by year, the yield per unit area of Chinese rice in 2018 is 7.027 tons/hectare, and the yield per unit area is increased by 1.59 percent on a par; the yield per unit of Chinese rice in 2019 is 7.059 tons/hectare, and the increase is 0.46 percent on a same scale. The rice consumption of China in 2019/2020 years is 1.45 hundred million tons, and the rice consumption of China in 2020/2021 years is expected to reach 1.47 hundred million tons. Under the huge rice base, the traditional rice transaction modes such as 'order type', 'payment on delivery', 'purchase at home' or 'cash transaction' have the problems of long period, opaque purchase information, slow efficiency, difficult responsibility positioning of problem rice and the like.

In recent years, new product forms and service modes are continuously developed by new-generation information technologies represented by the internet of things, big data, cloud computing and artificial intelligence, and the world is entering the global digital age. The realization of the digitization of the rice supply chain is an effective means for solving the difficult problem of the traditional supply chain transaction mode.

The certificate is a rights certificate which takes a block chain as a bottom layer technology and exists in a digital form; it represents a right, an inherent and inherent value. Common certificates are used primarily as data carriers, rights and interests certificates, and digital assets. Most of studies of domestic and foreign scholars on the general evidence are concentrated in the economic field, but achievements are obtained for application in other fields, for example, Zhang jin et al design an empirical knowledge production system by using a general evidence mechanism, and the generation of real data is promoted. The music copyright protection system is designed by the Wangzhen application of the general evidence technology. Zhoushui is designed by the general evidence technology and realizes the fund management of a house renting system and the like.

The application of the general evidence technology to the digitization of the rice supply chain is mainly embodied in that: the certificate of the currency is used as a rights and interests certificate of rice assets to realize the digital transaction of rice, a safe and credible transaction environment is provided, the transparency of rice price is promoted, the transaction efficiency of rice is greatly enhanced, and the problems of slow circulation, opacity, difficult transaction and the like of a rice supply chain are solved.

Disclosure of Invention

Aiming at the problems that rice circulation period is long, transaction is not transparent, information islands exist, rice is difficult to determine responsibility and the like in a traditional rice supply chain, a rice supply chain digital transaction platform framework is constructed based on a block chain principle and an intelligent contract technology, a block chain general evidence-based rice supply chain digital transaction method is designed, and digital circulation of a rice supply chain is realized by performing general evidence on assets in the real world.

The block chain general evidence based rice supply chain digital transaction method comprises the following specific steps:

step one, extracting six basic links of planting, storing, processing, warehousing, transporting and selling according to the business process of a rice supply chain;

dividing each participating enterprise into a production enterprise, a storage enterprise, a processing enterprise, a transportation enterprise and a sales enterprise corresponding to the basic links according to the operation range of each participating enterprise; all enterprises, consumers and regulatory bodies together constitute platform participants.

Step three, building a rice supply chain digital transaction platform comprising an exchange module, an identity authentication module, a pass-certificate transfer module, a rice transfer module and a basic block chain layer;

the identity authentication module is used for authenticating the identity of the platform participant and distributing a digital wallet and a digital identity card;

the exchange module is used for realizing the conversion of the rice assets and the cashing of the accreditation price;

the certificate passing module is used for realizing the passing of the token assets of the platform participants;

the rice circulation module is used for realizing the circulation of rice assets of the platform participants;

the basic block chain layer adopts a double-chain structure, a main chain is a union chain, a sub chain is a public chain, and the main chain and the sub chain are data interaction through an intelligent contract and an asymmetric encryption method to realize chain crossing.

The intelligent contract comprises: inquiring a data contract, uploading the data contract, verifying an intelligent contract, interacting the intelligent contract with data and calling the intelligent contract with the data.

And fourthly, the platform participant performs identity authentication through the identity authentication module and distributes the digital identity representative pass-card and the corresponding digital wallet.

The generation process of the digital identity representative certificate is as follows: each participant is registered, and identity verification is performed by comparing and checking the intelligent contract with a real identity card stored by a national government agency; after the verification is passed, automatically generating an address code as a digital wallet for storing the token assets of the participant; and meanwhile, generating a digital identity card corresponding to the real identity card according to the information.

Finally, the digital wallet and the digital identity card are saved to the blockchain.

Step five, the platform participants utilize the intelligent contract to realize the certification of the rice assets through the exchange module;

the general certification of the rice asset is as follows:

firstly, each platform participant stores the rice condition of each platform participant in a block chain, and a verification mechanism obtains related rice data.

Each basic link corresponds to respective evaluation index, and the professional of the exchange gives the accrual price of each basic link and divides the accrual price into corresponding score sections according to the grade and quality of each index in advance; the general price is the guiding unit price of rice.

Then, the merchant gives corresponding weight according to the grade and quality of each index; converting the scores and the weights to obtain conversion scores of the rice assets, and using the conversion scores to obtain the proportion of the accreditation and redemption; the cash is exchanged by cash.

The specific conversion formula is as follows: obtaining the converted fraction by using the sum of sigma (fraction-weight)/weight of each index, wherein the percentage of the converted fraction is the corresponding proportion of the accredited price;

and finally, after the conversion is successful, the intelligent contract is traced back for checking, the certification price is distributed after the conversion is passed, and the respective rice certification price of the platform participants is stored in the block chain.

And step six, matching the price of the rice general certificate with the identity representative general certificate of the platform participant by the platform participant to form the platform circulation unique general certificate.

The only common certificate contains three aspects: the digital identity card is used for indicating whether the participant is a buyer or a seller;

the token asset is the digitized money fund of each participant for rice buying and selling on the digital trading platform;

rice assets are proofs of rights and interests for rice, including various indicators of quality and grade of rice.

Seventhly, the buyer and the seller confirm the layered transaction of the cash and the rice through respective unique communication;

the circulation process is as follows:

firstly, a buyer broadcasts information of rice purchase to a block chain through an intelligent contract and publishes a unique certificate thereof, wherein the unique certificate comprises rice assets to be purchased and a certificate price;

each seller acquires related purchasing information issued by the buyer through an intelligent contract and provides the buyer with respective unique evidence including rice assets of the seller;

then, the buyer selects a seller with rice quality meeting the self requirement from the unique permit of each seller and publishes the price to the seller, the seller acquires relevant price information through an intelligent contract and considers that the price is proper, and the transaction between the two parties is achieved; the buyer transfers the unique certificate of the buyer to a digital transaction platform to lock the token asset; the seller transfers rice, which specifically comprises the following steps:

a) the intelligent contract automatically verifies whether the only evidence of the buyer is transferred or not, and after the verification is passed, the rice commodity of the seller is checked and the information is stored in the block chain.

b) The rice commodity is subjected to logistics transportation, after the rice commodity reaches a buyer, the buyer checks the rice commodity and counts a loss list, the loss list is stored in a block chain, an intelligent contract verifies the authenticity of the rice commodity, and automatic positioning and liability determination are carried out on loss reasons.

c) The loss portion is deducted by the smart contract, and both buyer and seller confirm.

And finally, when the buyer confirms that the received rice commodity is correct, the locked self-certification is unlocked, and the transaction is completed.

Step eight, the token assets of the seller are used for carrying out transaction or cashing of other links;

the specific cashing process is as follows:

firstly, a verification mechanism acquires and verifies the only pass certificate of a seller through an intelligent contract, and whether the pass certificate applied for cashing accords with unlocking or not; and after the verification is successful, calculating according to the corresponding proportion of the cashing of the accreditation price, selecting a cashing mode, carrying out fund distribution cashing, and storing all interaction records into a block chain.

The invention has the advantages that:

(1) the invention relates to a block chain based rice supply chain digital transaction method, which firstly applies a general evidence technology to the field of grain and oil food and applies the general evidence technology to a rice supply chain to design a complete circulation frame; the digital transformation of the rice can be well realized by applying the general evidence design provided by the invention, and the digital transformation method conforms to the great trend of national digital development.

(2) The invention discloses a block chain based rice supply chain digital transaction method, and provides a rice tracing platform, a rice monitoring platform and a rice transaction platform combined platform. The traditional rice transaction mode is broken through the block chain principle and the intelligent contract technology, and the credible traceability, credible supervision and credible transaction of the rice product are realized.

(3) The invention relates to a block chain communication certificate-based rice supply chain digital transaction method, which divides a rice transaction process into a cargo flow and a fund flow. The two are mutually influenced and independent, and the rice trading process is divided into two, so that the trading circulation speed of the rice market is improved, and the rice trading efficiency is greatly improved. Namely, the credible 'trade-first delivery-later' process is realized through the block chain technology and the intelligent contract.

(4) The invention provides a block chain based rice supply chain digital transaction method, which provides identity authentication, ensures the trueness and credibility of participators, and simultaneously ensures the credibility and accurate responsibility-determining positioning of transactions.

(5) The invention discloses a block chain general evidence based rice supply chain digital transaction method, and provides a method for transmitting data based on an asymmetric encryption mode so as to realize cross-chain intercommunication of the data between a public chain and a alliance chain.

(6) The invention relates to a block chain general certificate-based rice supply chain digital transaction method, which establishes a rice supply chain digital transaction platform model and provides a feasible method and solution for grain and oil full-grade digital transformation.

Drawings

FIG. 1 is a frame diagram of a rice supply chain digital transaction platform constructed according to the invention;

FIG. 2 is a flow chart of a block chain based rice supply chain digital transaction method of the present invention;

FIG. 3 is a block chain layer rice supply chain cross-chain diagram of the rice supply chain digital transaction platform according to the present invention;

FIG. 4 is a logical diagram of data contracts and upload data contracts in an intelligent contract of the present invention;

FIG. 5 is a logic diagram of validation, data interaction, and data invocation of an intelligent contract in accordance with the present invention;

FIG. 6 is a plan view of the present invention for realizing the certification of rice asset by the exchange module;

FIG. 7 is a flow chart of the present invention for a layered transaction between a buyer and a seller to confirm the present of funds and rice;

FIG. 8 is a diagram of a rice supply chain digital transaction model according to the present invention;

FIG. 9 is a diagram of the rice supply chain digital transaction prototype system architecture of the present invention.

Detailed Description

The present invention will be further described in detail and with reference to examples, which are included to enable those of ordinary skill in the art to understand and practice the invention.

At the present stage, aiming at the initial stage of the digital research of a rice supply chain, the invention designs a rice supply chain digital transaction method based on block chain general evidence based on a block chain technology, and by constructing a rice supply chain digital transaction platform frame, as shown in figure 1, firstly, each link and participant of the rice supply chain are determined, and secondly, a rice supply chain digital transaction platform core-general evidence is designed; the framework carries out pricing conversion and cashing on the existing rice assets through the exchange and realizes fund transfer and goods transfer of a rice supply chain digital transaction platform through an intelligent contract.

A rice supply chain digital transaction model and a rice supply chain digital transaction prototype system are designed based on the transaction platform, assets in the real world are subjected to certification, rice supply chain rice digitization is achieved, the problems of rice supply chain information isolated island and the like are solved by using a block chain principle, a feasible method is provided for rice supply chain digitization transformation, and a perfect reference and research idea is provided for grain and oil crops to achieve digitization transactions.

The block chain-based rice supply chain general evidence design method comprises the following specific steps as shown in fig. 2:

step two, dividing each relevant link business range participating in enterprise operation into a production enterprise, a storage enterprise, a processing enterprise, a transportation enterprise and a sales enterprise corresponding to the basic link; all enterprises, consumers and regulatory bodies together constitute platform participants.

the basic block chain layer adopts a double-chain structure, a main chain is a union chain, a sub-chain is a public chain, and the main chain and the sub-chain are data interaction through an intelligent contract and an asymmetric encryption method to realize chain crossing; the sub-chain mainly performs the function of token circulation, as shown in fig. 3. The data interaction between the main chain and the sub-chain is carried out in an asymmetric encryption mode, the interaction is divided into two processes of data uploading and data calling, and the main steps are as follows: the process of uploading data is as follows: the main chain broadcasts a main chain node public key to the sub-chains by using the intelligent contract, the sub-chain nodes encrypt data by using the main chain node public key, and the main chain decrypts the data by using a private key after the data is uploaded to the main chain by the intelligent contract. The process of calling the nodes is as follows: the sub-chain broadcasts a sub-chain public key to the main chain node by using an intelligent contract, and the main chain points encrypt data by using the sub-chain node public key. After the data is called to the sub-chain through the intelligent contract, the sub-chain decrypts the data by using the private key.

For data storage, information stored in the nodes of the main chain and the sub-chain is a data index, and the sub-chain is linked to cloud data through the main chain according to the index and an intelligent contract, so that data storage and calling are realized.

The intelligent contract comprises: the method comprises five types of processes of querying a data contract, uploading the data contract, verifying an intelligent contract, interacting the data with the intelligent contract and invoking the data with the intelligent contract, wherein the process flow of querying the data contract and uploading the data contract is shown in figure 4, and the process flow of verifying the intelligent contract, invoking the data with the intelligent contract and interacting the data with the intelligent contract is shown in figure 5.

For the intelligent contract for inquiring data, firstly, identity verification is carried out on a user who initiates inquiry, data in a cloud database is inquired according to a node data index after a preset condition is met, the data is encrypted and returned to the user after the inquiry content initiated by the user is found, the user decrypts by using a private key of the user to check the information content, the intelligent contract uploads the interaction to a block chain, and the user can directly inquire the data index information if inquiring the data again after the inquiry is finished without verifying the identity again.

For the uploaded data intelligent contract, firstly, identity verification is carried out on a user initiating an uploading instruction, after a preset condition is met, the uploaded data is verified, if the uploaded data meets the requirement of a rice transaction supply chain transaction platform, the uploaded data passes through the uploading data, and otherwise, the uploading process is refused. After the data pass through the cloud database, the data are uploaded to the cloud database, the data index is stored in the node, the node broadcasts the data to the full block chain network through the P2P network, and after the data uploading is finished, if the user uploads the data again, the user does not need to verify the identity again, and the data uploading verification can be directly carried out.

For verifying the intelligent contract, firstly, a user initiating a verification instruction and the contract are verified, after a preset condition is met, access matching verification is carried out on data, after the preset condition is met, matching verification is carried out on the data and a cloud database, and a verification result is returned to the initiating user or the contract. When the verification is finished, if the verification is needed again, the identity does not need to be verified again, and the data can be directly subjected to access matching verification.

For the intelligent contract called by the data, firstly, the identity of a calling person is verified, after the verification is successful, a user inputs the content to be called, and the contract entering node checks whether the calling content exists. After the data calling is inquired, whether the data can be called is verified, and after all conditions are met, the data is called according to a calling path. When the calling is finished, if the calling is required to be called again, the identity does not need to be verified again, and the database query can be directly carried out on the data.

For the data interaction intelligent contract, firstly, the identity of the data interaction object is verified, the interaction data is verified after the verification is successful, the data interaction is carried out after the interaction condition is met, whether the interaction rule is met in the interaction process is verified after the interaction is completed, and the data interaction is linked after the verification is successful.

The specific process of the rice supply chain digital transaction platform comprises the following steps:

a) and (4) voting and chaining by each enterprise, consumer and supervision organization according to the PBFT consensus protocol, performing identity authentication through an identity authentication module, and distributing an identity representative certificate and a corresponding wallet.

b) The whole platform has two roles of a buyer and a seller, and a participant realizes asset certification and cashing of certification in the exchange module; and matching the held pass card with the identity representative pass card to form a platform circulation unique pass card.

c) Buyers and sellers trade on a platform, and the trading platform realizes layered circulation of funds and rice. The traditional transaction mode of 'paying money with one hand and delivering goods with the other hand' is broken through, a completely credible environment is provided for a rice supply chain digital transaction platform by using a block chain technology, asynchronous transfer of rice and fund is realized, and the business completion efficiency of a rice market can be greatly improved.

d) And all the operations and interaction records in different links are subjected to uplink storage, so that the traceability and positioning of capital and rice are ensured, and the safety of data is ensured.

The generation process of the digital identity representative certificate is as follows: each participant is registered, and identity verification is performed by comparing and checking the intelligent contract with a real identity card stored by a national government agency; after the verification is passed, automatically generating an address code as a digital wallet for storing the token assets of the participant; and meanwhile, generating a digital identity card corresponding to the real identity card according to the registration information.

for asset docking of a trading platform and the physical world, a conversion and cashing mechanism in a trading exchange module is relied on; the invention firstly designs a method for the certification-based transformation by using an intelligent contract, and the certification-based transformation of the rice asset specifically comprises the following steps:

firstly, each platform participant stores the rice condition of each platform participant in a block chain, and a verification mechanism obtains related rice data through contract authorization and further verifies the authenticity of the data to ensure that the asset data is completely credible.

And each certificate is attached with a unique hash as a matching condition when matching. Circulation of the rice supply chain digital transaction platform runs with a certificate as a core, and a certificate design drawing is shown in fig. 6 and comprises three parts, namely: real-life asset mapping, digital identification, and digital wallets.

The real asset mapping comprises information such as rice batch, rice link, rice state and the like;

the digital identity certificate comprises basic information such as name, gender and the like, and information such as the address of the digital wallet, the digital identity card number and the like;

the digital wallet contains information such as total number of tokens, number of redeemable tokens, number of tokens to be unsealed, token source, and directions.

the only evidence for application to the rice supply chain proposed by the present invention is to facilitate traditional rice transfer into two parts, namely capital transfer and rice transfer; all participants define two roles, buyer and seller.

As shown in fig. 7, the process of circulation is as follows:

firstly, a buyer broadcasts information of rice purchase to each node of a block chain through an intelligent contract and publishes asset information such as rice quality and the like to be purchased in a unique certificate of the buyer;

each seller acquires related purchasing information issued by the buyer through an intelligent contract and provides the buyer with respective accredited middle rice asset mapping conditions through the intelligent contract;

then, the buyer selects a seller with rice quality meeting the self demand from the unique certificates of all sellers, after the expected indexes are reached, the buyer publishes the given certificate price to the seller, the seller acquires related price information through an intelligent contract, the price is considered to be proper, and the transaction of the two parties is achieved; the buyer transfers the unique pass certificate of the buyer to a digital transaction platform to lock the token asset, and the token asset cannot be used for cashing; the seller transfers rice, which specifically comprises the following steps:

b) The seller starts to deliver the rice, the rice commodities are subjected to logistics transportation, and the transportation conditions are linked up in real time; after the rice commodity reaches the buyer, the buyer checks the rice commodity and counts a loss list, the loss list is stored in a block chain, the authenticity of the rice commodity is verified by an intelligent contract, and the loss reason is automatically positioned and determined.

Finally, when the buyer confirms that the received rice commodity is correct, the locked self-certification is unlocked, and the transaction is completed; at this time, the certification of the seller, i.e., the rice asset, is transferred to the buyer's certification.

Step eight, the token assets of the seller are used for free circulation or cashing of other links;

the specific cashing process is as follows:

a) the verification mechanism obtains the only certification data of the seller through the intelligent contract and verifies the related rice digital assets mapped by the certification. b) Verifying the relevant state of the application certificate and determining whether the application certificate meets the unlocking requirement; c) after the verification is successful, the intelligent contract transforms the intelligent contract; d) after the conversion is successful, the intelligent contract conducts secondary reinspection on the converted token and the rice asset actually mapped, and the remaining token after the conversion is matched with the rights and interests certificate. e) After the rechecking is successful, calculating according to the corresponding proportion of the currency price cashing, and selecting cashing modes, namely cash, WeChat, Paibao and the like. f) And the intelligent contract conducts fund distribution and cashing according to the selected mode.

Finally all the interactive records are saved to the blockchain.

The invention establishes a rice supply chain digital transaction model according to a rice supply chain digital transaction platform framework, and the operation process mainly comprises the following steps: a) and each participating enterprise, the consumer and the supervision department carry out uplink through an intelligent contract. b) All participating enterprises and consumers are connected with national government departments to form digital identity cards, are connected with exchanges to form individual asset digital transformation, and are connected with digital wallets to complete platform token transactions; the three components together form the rice supply chain digital transaction platform. c) And carrying out fund transfer and rice transfer by using the intelligent contract based on the evidence of the individual participants. d) The model is carried out by depending on the sub-chains during fund transfer, and data is encrypted and transmitted in an asymmetric encryption mode to realize cross-chain transmission.

The model flow chart is shown in fig. 8. Each participant registers on the platform first to obtain a unique hash value, and the intelligent contract verifies the hash values of each participant enterprise, consumer and supervision agency to perform identity matching verification and matches corresponding authorities respectively. After the verification is successful, unique platform general certificates, namely rice asset mapping, token and digital identity cards, are respectively formed for different participants. And the front-end interface of the platform guides the completion of the formation of the evidence, and the back end verifies the authenticity of the data and performs data matching on the filled options according to the intelligent contract. After the evidence is formed, the evidence is used for rice transaction of the platform by using an intelligent contract, mainly comprising fund transfer and rice transfer. All data need to be subjected to uplink storage, and the model adopts a storage mode of 'node storage + cloud database', namely a node stores a data index, and the cloud database stores specific data content, so that the storage pressure of the node is reduced. The bottom layer block chain of the model adopts a double-chain structure, namely a main chain and a subchain.

The rice transaction flow provided by the invention is supplemented by the following two points: the whole platform will generate a certain GAS (gasoline cost) for the capital of the platform operation each time the contract is invoked and circulated. The platform comprises a main chain and a sub-chain, wherein the main chain is set as an alliance chain, and the sub-chain is set as a public chain. The transaction and circulation of tokens in the certificate are in a sub-chain, and the sub-chain performs data interaction with a main chain in an asymmetric encryption mode.

The rice is put on the digital chain and needs to be done at the exchange where the rice needs to be priced. The invention formulates the tokenization transfer rule of the rice assets by researching the related national standard, the local standard and the industry standard of the rice at the present stage. Specifically, the results are shown in Table 1.

The reference standards of the evaluation table are as follows: GB 1350-1978, GB 1357-1978, NY 20-1986, NY/T11-1985, NY/T13-1986, NY/T83-1988, GB/T17891-1999, GB 2763-1981, GB 13107-1991, GB 14935-1994, NY/T419-2000, NY 5115-2002, GB/T5009.114-2003, GB 2762-2005, NY/T593-2002, NY/T594-2002, NY/T595-2002, GB/T17891-2017, GB/T1354-2018, GB 1350, GB/T17891, GB/T1354, NY/T593, GB 2762-2017, GB 2761-2017, GB 2760-2014.

According to the standard, the rice supply chain is divided into 6 basic links, wherein the storage link comprises 4 small links, the processing link comprises 5 small links, the indexes are divided into 59, 14 indexes in the planting link, 14 indexes in the storage link, 11 indexes in the processing link, 13 indexes in the storage link, 3 indexes in the transportation link and 4 indexes in the selling link. According to the importance of the indexes, the weight occupied by the indexes is divided into 3 grades, wherein the first grade is a pollutant type index, the second grade is a self condition index such as rice, seeds and the like, and the third grade is an external index such as packaging and the like. The general evidence price is given by the buyer, and the specific situation is shown in table 2. The data given in the table are test data. Wherein the score is scored by professional personnel, and the higher the score is, the higher the rice quality is.

TABLE 1 Rice asset evaluation Table

TABLE 2 TOUCH-AUTHENTICATION PRICE INDICATION TABLE

Example verification:

by carrying out on-site investigation on a certain rice production and processing base in Henan, the base has complete rice enterprises including production enterprises, processing enterprises, storage enterprises, transportation enterprises, marketing enterprises and the like and consumers. The existing base has the problems of slow transaction flow, unreliable transaction environment, difficult positioning and liability, and the like, and under the participation of a certain supervision institution, the rice digital transaction uplink of the base is implemented for the rice transaction.

The prototype system constructed in this example is composed of a front-end webpage, a server, a cloud database, a mobile phone-end APP, and a blockchain network, and the system architecture is shown in fig. 9. The system uses C + + development language, JAVA development language and Golang development language to develop the block chain, and uses Gin and Vue as front and back end frames to develop the full stack. And developing a mobile phone end application software adaptive to the android system by using the QT development environment.

The core functions of the prototype system of the example include user management, rice assessment conversion, certification management, real-time monitoring and cross-chain management. User management includes user enrollment, user token management, token transaction management, and rice flow management. Rice assessment conversions include exchange professional scoring and token conversion. The function of the certificate management is mainly to manage the personal digital identity card, rice asset mapping and token. The real-time supervision mainly provides supervision behavior services such as traceability inquiry and the like for a supervision mechanism. Cross-chain management primarily serves data interactions between the main chain and child chains.

After the base enterprise finishes registering and chaining, each participant logs in through the unique hash value and is respectively matched with the authority function. The participating enterprises trade in the original system according to the respective certificates, and the rice is circulated according to the agreement achieved in the process of capital circulation. The system enables the transfer of funds, namely the achievement of transaction to be far faster than the actual transfer of rice, and greatly improves the transaction speed and efficiency of rice. Meanwhile, the blockchain provides a completely trusted and safe environment for the transaction mode, so that the transaction mode is realized. The operation of the system relies on the partial GAS fee charged per contract invocation.

For rice circulation, the system is divided into two states, namely receiving goods and not receiving goods, but once the transaction is achieved, the goods essentially belong to the buyer, and are accredited from the currency and belong to the buyer, but possibly in the seller, or in the transportation process, when the buyer receives the goods and a discount condition occurs, the contract carries out mortgage or deduction compensation on the accredited token or asset mapping of the buyer, and finally, the transaction token is unpacked. Platform transactions but not cash before the tokens are unsealed, and a cashing function can be realized at a transaction exchange after the tokens are unsealed, so that transaction fraud is prevented.

Through the verification of the base example, the system can realize the goal of complete full digital transaction of rice assets by utilizing the quick transaction of the rice and the accurate monitoring of a monitoring organization.

Claims

1. A block chain communication certificate-based rice supply chain digital transaction method is characterized by comprising the following specific steps:

dividing each participating enterprise into a production enterprise, a storage enterprise, a processing enterprise, a transportation enterprise and a sales enterprise corresponding to the basic links according to the operation range of each participating enterprise; all enterprises, consumers and supervision departments jointly form platform participants;

fourthly, the platform participant performs identity authentication through an identity authentication module, distributes a digital identity representative pass card and stores the corresponding digital wallet into a block chain;

step six, the platform participants match the price of the rice general certificate with the identity representative general certificate of the platform participants to form a platform circulation unique general certificate;

the rice asset is the right certificate of rice, including various indexes of the quality and grade of the rice;

and step eight, the token assets stored in the digital wallet of the seller are used for carrying out other links of transaction or cashing.

2. The block chain based rice supply chain digital transaction method of claim 1, wherein in the third step, the identity authentication module is used for authenticating the identity of platform participants and distributing digital wallets and digital identity cards;

the basic block chain layer adopts a double-chain structure, a main chain is a union chain, a sub-chain is a public chain, and the main chain and the sub-chain are data interaction through an intelligent contract and an asymmetric encryption method to realize chain crossing;

3. The block chain based rice supply chain digital transaction method of claim 1, wherein in the fourth step, the digital identity representative certificate is generated by:

each participant is registered, and identity verification is performed by comparing and checking the intelligent contract with a real identity card stored by a national government agency; after the verification is passed, automatically generating an address code as a digital wallet for storing the token assets of the participant; and meanwhile, generating a digital identity card corresponding to the real identity card according to the information.

4. The block chain based rice supply chain digital transaction method according to claim 1, wherein in the fifth step, the block chain based rice supply chain digital transaction method specifically comprises the following steps:

firstly, each platform participant stores the rice condition of each platform participant in a block chain, and a verification mechanism obtains related rice data;

each basic link corresponds to respective evaluation index, and the professional of the exchange gives the accrual price of each basic link and divides the accrual price into corresponding score sections according to the grade and quality of each index in advance; the general price is the guiding unit price of the rice;

then, the merchant gives corresponding weight according to the grade and quality of each index; converting the scores and the weights to obtain conversion scores of the rice assets, and using the conversion scores to obtain the proportion of the accreditation and redemption;

5. The block-chain-based rice supply chain digital transaction method as claimed in claim 1, wherein in the seventh step, the buyer and the seller realize the circulation process of the layered transaction of funds and rice as follows:

then, the buyer selects a seller with rice quality meeting the self requirement from the unique permit of each seller and publishes the price to the seller, the seller acquires relevant price information through an intelligent contract and considers that the price is proper, and the transaction between the two parties is achieved; the buyer transfers the unique certificate of the buyer to a digital transaction platform to lock the token asset;

then, the seller conducts rice circulation, which specifically comprises the following steps:

a) the intelligent contract automatically verifies whether the only evidence of the buyer is transferred or not, and after the verification is passed, the rice commodity of the seller is checked and the information is stored in the block chain;

b) carrying out logistics transportation on the rice commodities, after the rice commodities arrive at a buyer, checking the rice commodities by the buyer, counting a loss list, storing the loss list into a block chain, verifying the authenticity of the rice commodities by an intelligent contract, and automatically positioning and determining the liability of loss reasons;

c) deducting the token from the lost part through an intelligent contract, and confirming by the buyer and the seller;

6. The block chain based rice supply chain digital transaction method according to claim 1, wherein the process of cashing in the eighth step is as follows: