CN113807845B

CN113807845B - Real estate transaction system based on blockchain and implementation method thereof

Info

Publication number: CN113807845B
Application number: CN202110898468.7A
Authority: CN
Inventors: 毛帅; 刘亚; 于超; 张云龙; 乔浩; 徐亮
Original assignee: Seashell Housing Beijing Technology Co Ltd
Current assignee: Seashell Housing Beijing Technology Co Ltd
Priority date: 2021-08-05
Filing date: 2021-08-05
Publication date: 2024-05-24
Anticipated expiration: 2041-08-05
Also published as: CN113807845A

Abstract

The invention provides a real estate transaction system based on a blockchain and an implementation method thereof, wherein the real estate transaction system at least comprises a blockchain network layer and a data storage and certification layer which are in communication connection with each other, and the implementation method comprises the following steps: based on the blockchain alliance technology, respectively deploying blockchain nodes at least two participation subjects of the house property transaction to build a blockchain network layer, wherein the blockchain nodes are used for jointly storing transaction service data storage certificates; respectively deploying data certification units on the at least two participating subjects to build a data certification layer, wherein the data certification units are used for acquiring local transaction service data and storing/acquiring transaction service data certification to a blockchain network layer; and establishing communication connection between the corresponding blockchain nodes of each participating main body and the data storage certification unit so as to establish communication connection between the blockchain network layer and the data storage certification layer. The real estate transaction is performed on the whole flow line, can be traced and monitored, can effectively improve the efficiency, and has high reliability.

Description

Real estate transaction system based on blockchain and implementation method thereof

Technical Field

The invention relates to the technical field of blockchains, in particular to a real estate transaction system based on blockchains and an implementation method thereof.

Background

At present, the real estate transaction mostly adopts an off-line transaction mode, has long flow, various scenes and numerous cooperative roles, and takes mutual trust as a business basis. Taking the common residence transition registration of loan clients as an example, the current flow is mostly performed off-line, namely: the buyer firstly transacts loans at banks, after the batch loans are completed and the client pays tax, the buyer and the seller hold paper materials such as internet protocol, tax ticket, title, identity card and the like to go to the living hall, and after the face of the staff and the two parties are confirmed, the business is transacted according to the living application.

The paper materials required by the off-line transaction mode are complex, a user needs to carry a large number of proving materials to run for a long time at related service points such as an intermediary mechanism, a real estate center and the like, and the whole flow is long in time and low in efficiency. In addition, a large amount of work is manually participated in the flow, so that the risk of manual errors or cheating is easy to occur, and the tracing is difficult after the problems occur.

Disclosure of Invention

The invention provides a real estate transaction system based on a blockchain and an implementation method thereof, which are used for solving the defects that the real estate transaction flow is long, the efficiency is low, the problems of manual errors or cheating risks are easy to occur and the like in the prior art, and achieving the aims of effectively shortening the transaction time and improving the transaction efficiency and the transaction reliability.

The invention provides a real estate transaction system implementation method based on a blockchain, wherein the real estate transaction system at least comprises a blockchain network layer and a data storage and certification layer which are in communication connection with each other, and the implementation method comprises the following steps:

Based on a blockchain alliance technology, respectively deploying corresponding blockchain nodes at least two participation subjects of the house property transaction to build the blockchain network layer, wherein the blockchain nodes are used for jointly storing transaction service data storage certificates;

the corresponding data storage and verification units are respectively deployed at the at least two participating subjects to build the data storage and verification layer, and the data storage and verification units are used for acquiring local transaction service data from a service system of the corresponding participating subject and/or storing or reading the transaction service data storage and verification into the blockchain network layer, wherein the transaction service data storage and verification is the storage and verification data of the local transaction service data in the blockchain network layer;

And establishing communication connection between the corresponding blockchain node of each of the at least two participating principals and the data storage certification unit so as to establish communication connection between the blockchain network layer and the data storage certification layer.

According to the implementation method of the real estate transaction system based on the blockchain, the participation main body comprises at least two of the following main bodies:

sellers, buyers, real property management departments, intermediaries, tax management departments, and banks that transact real property loans.

According to the implementation method of the real estate transaction system based on the blockchain, which is provided by the invention, the local transaction service data comprises transaction text information and/or transaction spare parts, and the implementation method further comprises the following steps:

configuring first internal business logic of the data storage unit, wherein the first internal business logic comprises:

At least one of the following operations is performed while storing the local transaction service data in the blockchain network layer:

Storing the transaction text information into the blockchain node in a plaintext or ciphertext mode;

And storing the original text of the transaction spare part into the data storage unit, and storing the acquired hash code of the transaction spare part into the blockchain node.

The invention provides a real estate transaction system implementation method based on block chain, which further comprises the following steps:

Establishing communication connection between the data storage unit and the corresponding business system of the participating main body, and configuring a system interface of the data storage unit to realize at least one of the following functions:

the business system of the corresponding participating main body obtains the transaction business data certificate from the blockchain node or the data certificate storage unit through the system interface;

And submitting the transaction text information generated by the business system of the corresponding participating main body and/or the hash code of the generated transaction spare part to the block chain link point to finish the uplink, and sending the original text of the transaction spare part to other data certification units in the data certification layer.

the data certification unit is configured to include at least one of the following modules:

the data checking foreground module is used for checking the transaction business data evidence of the transaction whole flow;

The data uplink service module is used for calling intelligent contracts commonly maintained by the block chain network layer from the block chain nodes corresponding to the data storage unit and completing the uplink of the local transaction service data based on the intelligent contracts;

The data chain verification module is used for verifying whether the local transaction service data is consistent with the transaction service data certificate recorded by the blockchain network layer;

the on-chain data query module is used for querying the service capability of the transaction service data recorded by the blockchain network layer;

the spare part data storage module is used for storing the spare part texts of the transaction and relating to specific transactions;

And the spare part data query module is used for querying the transaction spare part original text stored by the spare part data storage module.

Configuring the blockchain node such that the blockchain node includes at least one of the following modules:

The universal component service module is used for adapting the corresponding business system of the participating main body and the blockchain network layer;

The block chain component service module is used for constructing a protocol of the block chain node;

the machine deployment module is used for deploying physical machines or cloud virtual machines of the blockchain nodes;

the network intercommunication module is used for realizing network intercommunication among the block chain nodes;

And the intelligent contract module is used for inquiring the transaction service data certificate in the data certificate layer, counting the transaction service data certificate into the data certificate layer and verifying and comparing the local transaction service data with the transaction service data certificate in the data certificate layer.

Configuring second internal business logic of the blockchain node, the second internal business logic including at least one of:

Providing the transaction service data evidence to the participating subjects associated with the transaction service data evidence in an original form, and providing the transaction service data evidence to the participating subjects not associated with the transaction service data evidence in a corresponding hash code form;

Encrypting the user sensitive data by using a public key, and providing a secret key corresponding to the public key for a participating main body associated with the user sensitive data so as to decrypt the encrypted data and obtain the user sensitive data.

According to the implementation method of the real estate transaction system based on the blockchain, in the process of applying for real estate transaction, the local transaction service data comprise the process and specific input information of both buyers and sellers generated by applying for the real estate transaction, and the authentication process and authentication result information of both buyers and sellers generated by formal real estate transaction, and the implementation method further comprises the following steps:

configuring a third internal service logic of the data storage unit, wherein the third internal service logic comprises:

After the input of the pass application information is completed, acquiring the process and specific input information of the buyer and the seller, and storing the process and specific input information of the buyer and the seller into the blockchain network layer for verification;

when formally initiating a pass, carrying out true willingness authentication on both sides of a buyer and a seller, acquiring authentication process and authentication result information of both sides of the buyer and the seller, and storing the authentication process and the authentication result information of both sides of the buyer and the seller into the blockchain network layer for certification;

and/or the number of the groups of groups,

The method further comprises the steps of:

Building a service application layer, and configuring fourth internal service logic of the service application layer, wherein the fourth internal service logic comprises: and providing a client or a business system background for the participating subject through the corresponding business system of the participating subject, and completing a corresponding real estate transaction flow according to the operation of the participating subject or staff of the participating subject on the client or the business system background.

The invention also provides a real estate transaction system based on the blockchain, which is realized based on the real estate transaction system realization method based on the blockchain.

The invention also provides an electronic device, which comprises a memory, a processor and a program or instructions stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the method for realizing the real estate transaction system based on the blockchain when executing the program or instructions.

The present invention also provides a non-transitory computer readable storage medium having stored thereon a program or instructions which, when executed by a computer, implement the steps of a blockchain-based real estate transaction system implementation method as described in any of the above.

The present invention also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of a blockchain-based real estate transaction system implementation method as described in any of the above.

According to the real-property transaction system based on the blockchain and the implementation method thereof, which are provided by the invention, the real transaction process evidence storage which is complete and can not be tampered is formed by linking the whole real-property transaction process (such as house watching, signing, loan, tax paying and the like) of the clients at the real-property transaction participation main body, so that the stock house transfer registration can be completed remotely by both parties of the buyer and the seller, the transaction is performed on the whole flow line, the traceability and the monitoring can be realized, the risk brought by manual processing can be reduced while the efficiency and the user experience are improved, the reliability is high, and the personnel aggregation can be reduced.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, a brief description will be given below of the drawings that are needed in the embodiments of the invention or the description of the prior art, it being obvious that the drawings in the following description are some embodiments of the invention and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method for implementing a blockchain-based real estate transaction system provided by the present invention;

FIG. 2 is a schematic diagram of a block chain based real estate transaction system according to one embodiment of the present invention;

FIG. 3 is a diagram illustrating an exemplary manner of data transfer configured in a method for implementing a blockchain-based real estate transaction system in accordance with the present invention;

fig. 4 is a diagram illustrating a foreground list of data display in a data storage unit configured by a realizing method of a real estate transaction system based on blockchain according to the present invention;

FIG. 5 is a diagram of details of a foreground for data presentation in a data storage and certification unit configured according to the implementation method of the blockchain-based real estate transaction system provided by the present invention;

FIG. 6 is a diagram of a data display foreground verification example in a data storage verification unit configured according to the implementation method of the blockchain-based real estate transaction system provided by the present invention;

FIG. 7 is a diagram illustrating privacy protection of transaction data storage by a blockchain node in a blockchain-based real estate transaction system implementation method according to the present invention;

FIG. 8 is an exemplary diagram of block link points deployed in a disaster recovery backup manner in a method for implementing a blockchain-based real estate transaction system according to the present invention;

FIG. 9 is a business logic flow diagram of a data storage unit configured in a blockchain-based real estate transaction system implementation method according to the present invention for the initiation and auditing of a pass application;

FIG. 10 is a second schematic diagram of a block-chain based real estate transaction system according to the present invention;

FIG. 11 is an exemplary diagram of a new intermediary node joining a real estate transaction system in a blockchain-based real estate transaction system implementation method provided in accordance with the present invention;

FIG. 12 is a schematic diagram of a flow chart of the uplink of intermediary business data in a house property transaction method according to the present invention;

FIG. 13 is a schematic diagram of a banking data uplink flow in a real estate transaction method according to the present invention;

FIG. 14 is a diagram illustrating a tax service data uplink flow in a real estate transaction method according to the present invention;

Fig. 15 is a schematic diagram of an entity structure of an electronic device according to the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Aiming at the problems of long real estate transaction flow, low efficiency, easy occurrence of human errors or cheating risks and the like in the prior art, the invention forms a complete and untampered real transaction process evidence by linking the whole real estate transaction process (such as house watching, signing, loan, tax paying and the like) of clients at the real estate transaction participation main body, realizes remote completion of stock house transfer registration by both parties of buyers and sellers, realizes online whole transaction flow, can be traced and monitored, can reduce the risk brought by manual processing while improving the efficiency and user experience, has high reliability, and can reduce personnel aggregation. The invention will be described and illustrated hereinafter with reference to the drawings, particularly by means of a number of embodiments.

Fig. 1 is a flow chart of a method for implementing a real estate transaction system based on blockchains, where the real estate transaction system at least includes a blockchain network layer and a data storage layer which are communicatively connected with each other, as shown in fig. 1, the implementing method includes:

s101, based on the blockchain alliance technology, respectively deploying corresponding blockchain nodes at least two participation subjects of the real estate transaction to build the blockchain network layer.

The blockchain nodes are used for jointly storing transaction service data evidence.

It can be understood that the present invention adopts a alliance chain to perform blockchain networking on the real estate transaction system, uses a multi-node alliance establishment mode to perform centralized networking, adopts Raft consensus mechanism, and deploys nodes at each of at least two participating subjects participating in the real estate transaction process, wherein the nodes can be called blockchain nodes. And the block chain link points respectively deployed by the at least two participating main bodies are mutually communicated and connected to construct a block chain network layer so as to ensure that multiple nodes witness and maintain data together and improve the public confidence and objectivity of the data.

The blockchain nodes jointly store transaction service data storage certificates, which means that each blockchain node in the blockchain network layer stores a backup of the transaction service data storage certificate, and the same transaction service data storage certificates are jointly maintained by multiple parties to prevent an individual participant from illegally modifying the transaction service data.

Wherein the participating subjects may include buyers and sellers, censoring authorities, benefit-related authorities or auxiliary authorities, etc. participating in the real estate transaction process. Wherein optionally the participating subject comprises at least two of the following subjects: sellers, buyers, real property management departments, intermediaries, tax management departments, and banks that transact real property loans.

It will be appreciated that, depending on the actual property transaction process, the first involved in the transaction process typically includes a seller or seller delegate (i.e., seller) and a buyer or buyer delegate (i.e., buyer) of the property, which may be collectively referred to as the buyer and seller.

Meanwhile, the real estate transaction process involves the change of real estate information, and real estate departments need to examine the information of both buyers and sellers, so that real estate management departments also become participants of the real estate transaction, and belong to examination institutions.

In addition, transactions may be facilitated by intermediary institutions, and thus the intermediary institutions may also become participants, and in the case of loan buyers, banks, tax authorities, etc. that transact real estate loans may also participate in the transaction process, which may be referred to collectively as benefit-related institutions or ancillary institutions.

Thus, at least two participating principals can be selected from the participating principals of the actual real estate transaction, and the blockchain nodes can be deployed at the selected participating principals, respectively. Then, a blockchain network layer including the blockchain nodes is built by connecting the respectively deployed blockchain nodes of each selected participating subject. That is, the blockchain network layer is ultimately composed of at least two blockchain nodes deployed at the participating principals.

For example, where the relevant parties include buyers, sellers, intermediaries, real property centers, tax authorities, and banks, blockchain nodes may be deployed at government real property authorities, real property intermediaries, tax authorities, and banks, respectively, and blockchain networking based on the deployed blockchain nodes. The blockchain alliance chain is established in the real estate agency, the government real estate management department, the tax management department and the bank for transacting real estate loans, and the blockchain network is utilized to realize data registration, verification and acquisition, realize data intercommunication and data verification, and have higher transaction efficiency and reliability.

The alliance chain is a cluster formed by a plurality of private chains, and is participated in and managed by a plurality of organizations or organizations (such as sellers, buyers, real property management departments, intermediaries, tax management departments, banks for handling real property loans and the like) of the invention, and each organization or organization manages one or more nodes, and data of the organization or organization only allows different organizations in the system to read, write and send. Each node of the federation chain typically has an entity organization corresponding thereto that can join and leave the network after authorization. Organizations constitute benefit-related federations that collectively maintain healthy operation of blockchains.

In addition, in the practical application scene, authority nodes (such as notarization department nodes deployed at notarization department) can be introduced into the alliance chain to endorse the alliance chain public trust, so that the blockchain public trust is further enhanced, the system plays a role in legal dispute scenes, and the acceptance of the court on untwisted data on the chain can be improved after the legal litigation scenes occur.

As shown in fig. 2, one of the schematic structural diagrams of the blockchain-based real estate transaction system provided by the present invention includes a blockchain network layer 201, which is a "real estate transaction chain" formed by participating banks in real estate centers, intermediaries, tax, and housing credits, and the chain is a alliance chain, and the real estate centers, intermediaries, tax, and housing deployment nodes together store uplink transaction service data (such as customer name identity information, housing source information, etc.), so as to improve data public confidence while realizing data intercommunication sharing.

S102, respectively deploying corresponding data certification units at the at least two participating subjects to build the data certification layer.

The data storage and verification unit is used for acquiring local transaction service data from a service system of a corresponding participating main body, and/or storing or reading the transaction service data storage and verification into the blockchain network layer, wherein the transaction service data storage and verification is the storage and verification data of the local transaction service data in the blockchain network layer.

It can be understood that after the blockchain network layer is established to document the transaction service data of the real estate transaction, the invention can also establish a data document layer for acquiring the transaction service data from the service system of each real estate transaction participant and storing the transaction service data into the blockchain network layer to realize the uplink of the data. And meanwhile, the method can also be used for reading transaction service data certificate from a blockchain network layer to verify whether the transaction data acquired from each participating main body service system is credible or not.

Specifically, the data storage units can be deployed at each participating subject where the blockchain node is deployed, so that each participating subject is deployed with both the blockchain node and the data storage unit, and the blockchain nodes at each participating subject and the data storage units have a one-to-one correspondence. Then, on the basis of deploying data certification units at least two participating subjects, communication connection is established among the data certification units to form a network layer for interconnection communication, and the network layer is used as a data certification layer of a real estate transaction system.

That is, both blockchain nodes and data certification units are deployed at one participating principal, where the blockchain nodes correspond to the data certification units. The plurality of blockchain nodes deployed at the plurality of participating principals are connected into a blockchain network layer, while the plurality of data logging units deployed at the plurality of participating principals are connected into a data logging layer.

For example, in order to obtain business data by interfacing with a government real estate department system, a real estate agency system, a tax system, a banking system and the like, complete data uplink and data verification, and provide a platform for personnel to view evidence materials, a certification management platform, namely a data certification layer, needs to be built, so that the functions are completed. The evidence display foreground capability of the system can be deployed on a real estate management department system to be checked by real estate staff during transfer registration audit, and other intermediary institutions, tax and banking systems determine specific functions deployed locally according to specific requirements.

As shown in fig. 2, the data storage layer 202 is a storage unit based on blockchain construction, and implements the uplink and verification of transaction service information. By establishing the evidence checking system application, namely the data evidence checking layer 202, system support is provided for checking transaction authenticity when evidence checking is carried out on staff of the government real estate department.

S103, establishing communication connection between the corresponding blockchain node of each of the at least two participating principals and the data storage certification unit so as to establish communication connection between the blockchain network layer and the data storage certification layer.

It can be understood that, in order to realize the smooth uplink of the transaction service data and the inquiry and verification of the transaction service data certificate in the blockchain network layer, a communication connection can be established between the established blockchain network layer and the data certificate layer.

Specifically, for each blockchain node in the blockchain network layer, determining a data storage verification unit corresponding to the blockchain node according to the participation subject of the blockchain node, and performing communication connection between the blockchain node and the corresponding data storage verification unit to realize communication connection between the whole blockchain network layer and the data storage verification layer.

As shown in fig. 2, there is a communication connection between the data storage layer 202 and the blockchain network layer 201, enabling the uplink and verification of transaction traffic data.

According to the real-property transaction system implementation method based on the blockchain, through the fact that the whole real-property transaction process (such as house watching, signing, loan, tax paying and the like) of the real-property transaction, which occurs at the real-property transaction participation main body, of the customer is uplink, a complete and untampereable real-property transaction process evidence is formed, the stock house transfer registration can be completed remotely by both parties of the buyer and the seller, the transaction is performed on the whole flow line, traceability and monitoring are achieved, the risk brought by manual processing can be reduced while the efficiency and the user experience are improved, the reliability is high, and meanwhile, the personnel aggregation can be reduced.

Optionally, the local transaction service data includes transaction text information and/or transaction spare parts, and the implementation method further includes: configuring first internal business logic of the data storage unit, wherein the first internal business logic comprises: at least one of the following operations is performed while storing the local transaction service data in the blockchain network layer:

It can be understood that in connection with the actual real estate transaction process, transaction information is divided into two categories: the transaction text information such as buying and selling names, identity card numbers, cost of transaction and the like; the other type is a trading spare part of the type of pictures such as identity card pictures, electronic contract documents and the like, PDF and audio and video. All transaction information (including text information and transaction spare parts) mutually transferred by the agency, tax administration, bank and real estate center are linked through the system capability of the certification unit integration.

And for the text transaction information, data intercommunication is directly carried out through a blockchain in a plaintext or ciphertext mode. For the transaction spare parts, the storage space and the performance are considered, the data HASH (HASH) code is used for linking, and the acquisition of the plaintext is completed by calling a certification system of the spare part attribution party. The plaintext stored by the spare part home party certificate storing system corresponds to the blockchain HASH one by one and is used for verifying that the data is not tampered.

According to the invention, the text transaction information is encrypted and uplink, only the HASH of the transaction spare part is uplink, and the original of the transaction spare part is stored in the data storage layer, so that the user data information safety can be effectively ensured, and the storage space of the blockchain can be effectively saved.

Further, on the basis of the above embodiments, the implementation method of the real estate transaction system based on the blockchain provided by the invention further comprises the following steps: establishing communication connection between the data storage unit and the corresponding business system of the participating main body, and configuring a system interface of the data storage unit to realize at least one of the following functions:

And submitting transaction text information and/or hash codes of the transaction spare parts generated by the corresponding business systems of the participating subjects to the block chain link points to finish the uplink, and sending the original text of the transaction spare parts to other data certification units in the data certification layer.

It is understood that the invention can connect the data storage units of the real estate center, the intermediary organization, the tax management system and the bank with the respective big data systems by establishing communication connection. And the big data systems of all departments and institutions acquire transaction information and/or spare parts from a blockchain network layer and other data storage and verification units through the system interface capability provided by the local data storage and verification units, or uplink the self-generated business process data and send the transaction spare part primary text to other data storage and verification units needing the business process data in the data storage and verification layer, so that the data are mutually transferred.

Taking real estate acquisition intermediation evidence information as an example, as shown in fig. 3, an example diagram of a data transmission manner configured in a real estate transaction system implementation method based on blockchain according to the present invention is shown, where:

the data storage and verification unit is deployed locally in each department and institution and managed by each department and institution, for example, the real estate storage and verification unit is deployed in real estate and managed by the real estate. The certification units of the respective organizations are interoperably accessible.

The method comprises the steps that transaction spare part texts (such as real estate certificates, loan batch credit letters and the like) for storing certificates, which are generated in a transaction process of each organization (namely a participating main body), are stored in data storage units of each organization, and when real estate is subjected to the verification of household information, the real estate storage units are accessed to store corresponding plaintext for acquisition (such as batch credit letters are acquired from bank storage units, and tax notes are acquired from tax storage units).

In addition, the real estate certificate unit provides a transaction data display foreground page and a checking function, and real estate departments in various places serve as system administrators to open page inquiry authorities for real estate staff for use in real estate passing auditing. The method can inquire whether the currently recorded business data of each transaction is consistent with the records on the blockchain, and verify whether the data is tampered, so that the authenticity of the transaction is verified.

The foreground page can be embedded into the existing system of the real estate in a link jump mode or independently provides a query background according to the requirements of government management departments, and the verification function of the foreground page is to verify the data on the local nodes of the block chain of the real estate so as to ensure the objectivity of the verification data source.

The invention can enable the big data system of each department and organization to be connected into the blockchain of the real estate transaction system by configuring the system interface capability of the data storage and certification unit, and is convenient for storing/fetching data therefrom, thereby ensuring that the auditing and verifying flow of real estate transaction is more convenient and the efficiency is higher.

Further, on the basis of the above embodiments, the implementation method of the real estate transaction system based on the blockchain provided by the invention further comprises the following steps: configuring the blockchain node such that the blockchain node includes at least one of the following modules:

It can be understood that, in order to enable the real estate transaction system to realize corresponding functions or capabilities, when the real estate transaction system is realized by the invention, the construction of the blockchain nodes is required, including machine deployment, network intercommunication and the like, and the internal business logic configuration is also required for the blockchain network layer, that is, the configuration of the corresponding blockchain nodes has corresponding functions. Specifically, as shown in table 1, a functional module analysis example table of a blockchain node configured for the implementation method of the blockchain-based real estate transaction system provided by the invention is provided, wherein each functional module and corresponding functional description contained in the data storage layer are listed.

TABLE 1 functional module resolution example Table of blockchain nodes configured in accordance with an embodiment of the invention

Further, on the basis of the above embodiments, the implementation method of the real estate transaction system based on the blockchain provided by the invention further comprises the following steps: the data certification unit is configured to include at least one of the following modules:

It can be understood that, similar to the above block link points, in order to enable the real estate transaction system to achieve corresponding functions or capabilities, when implementing the real estate transaction system by the present invention, data storage verification units are required to be constructed, including data uplink, data verification, etc., that is, internal service logic configuration is required to be performed on the data storage verification layer, so that the corresponding data storage verification units have corresponding functions, specifically, as shown in table 2, a function module analysis example table of the data storage verification units configured by the real estate transaction system implementation method based on the blockchain provided by the present invention is listed in the function module analysis example table of each function module and the corresponding function description thereof included in the data storage verification unit.

Table 2, functional module parsing example table of data storage unit configured according to an embodiment of the present invention

The intelligent contract is a contract stored by all the block chain link points together, that is, each block chain node has a backup of the intelligent contract and is shared by all the block chain link points, so that the intelligent contract is an intelligent contract of a block chain network layer, and can be actually called from the block chain node corresponding to the current data storage unit or from other block chain link points of the block chain network layer through the corresponding block chain node.

It can be understood that, in the data certification layer in the present invention, the functions of the real estate, intermediary, bank and tax certification units include: registering the business occurrence process and the result mark evidence information on the real estate transaction blockchain through the evidence storage platform. The transaction text information is stored and communicated by the blockchain nodes, the original text of the transaction spare part is stored in the respective certification platform, and the spare part HASH is uplink to play a role in data certification. (if the original text of the spare part needs to be acquired, the certification system of the home party of the spare part is accessed under the condition of authorization)

In addition, the real estate certificate system provides a front-end checking page and a blockchain verification function for checking the information of the second-hand house transaction process and evidence mark of each single, and can verify whether the information in the transaction is consistent with the information registered on the blockchain.

For example, the page information display or data interface informs the real estate of the buyer name and the identity card number of a single second-hand house transaction, and the real estate staff can acquire the uplink information certificate in the blockchain through the page button function or the system interface to verify that the information is indeed registered in the chain and the specific uplink time.

Taking a real estate certificate unit deployed in a real estate center as an example, a front page capable of configuring real estate certificate platform information to view and verify is displayed in a list schematic diagram or detail schematic diagram mode. The list schematic diagram can be shown in fig. 4, which is a schematic diagram of a data display front list in a data storage evidence unit configured by the implementation method of the real estate transaction system based on blockchain, wherein summary information of second-hand real estate transaction is displayed, and query screening is performed according to cell names, buyer names and the like, so that staff can quickly locate specific transaction items.

As shown in fig. 5, a diagram of details of a foreground is shown in a data storage and verification unit configured by the implementation method of the real estate transaction system based on blockchain, wherein key processes and evidence information obtained or generated by the whole flow of a specific mobile house transaction item are shown for verification by staff during checking by a passer-by.

In addition, as for data verification, as shown in fig. 6, a diagram of a data display foreground verification example in a data storage verification unit configured according to the implementation method of the real estate transaction system based on blockchain provided by the invention, wherein for text information (the page directly extracts and displays data stored on a chain), a display certificate illustrates a specific data block ID of a uplink, a transaction ID, a uplink time and specific information, and is further verified as on-chain registration data; and aiming at the spare part data, the page displays the spare part original text obtained from the intermediate certificate, and whether the original text HASH is consistent with the blockchain storage or not is checked by comparing, so as to prove that the data is not tampered.

Further, on the basis of the above embodiments, the implementation method of the real estate transaction system based on the blockchain provided by the invention further comprises the following steps: configuring second internal business logic of the blockchain node, the second internal business logic including at least one of:

It can be understood that each block link point in the block chain alliance is configured to form 'double insurance' through privacy protection and sensitive data encryption of transaction service data, so that risks of leakage of the transaction data or user privacy data are avoided, and the safety of the transaction data is fully ensured.

Taking the example that privacy protection is set up in real estate and intermediaries, notarization department nodes cannot view, as shown in fig. 7, an example diagram of privacy protection for configuring blockchain nodes to store transaction service data in a realizing method of a blockchain-based real estate transaction system according to the present invention is shown, wherein:

firstly, the uplink transaction service data adopts a privacy protection mechanism, only departments and institutions (intermediaries, tax and banks) related to the transaction data and a real estate center can view and acquire corresponding transaction item information on the link, and other nodes can only view the data HASH (playing the role of data evidence storage) and cannot view the data originals.

Secondly, encrypting the sensitive data (such as the customer identity card number) of the user through the real estate public key, only the private key of the real estate system can decrypt and acquire the plaintext, and the specific plaintext information is displayed when the user passes the household verification.

The invention utilizes the blockchain privacy protection mechanism, and intermediaries, tax and banks of different brands can not review specific data mutually, so that the data privacy can be ensured, and meanwhile, the data fingerprint HASH can be reviewed mutually, so that the data can be stored mutually to ensure that the data cannot be tampered. In addition, the real estate management department in the same city with the intermediary organization can view the synchronous data of the local intermediary organization, tax and bank, can play roles in flow auditing and supervision, and is safe and high in reliability.

In addition, the block chain network layer node networking can be configured to ensure the stability of the system in a disaster recovery backup mode, namely: and more than 2 nodes are respectively deployed in an intermediary mechanism, a real estate center, tax and banks, and the data of each node is automatically synchronized. If one node is in service downtime, after restarting, the data of the other node is automatically synchronized, and the availability of the block chain network is ensured.

Meanwhile, the cloud service network can provide hot backup for the servers, and after one server cannot operate, the other servers are automatically supplemented with the hot backup, so that the system stability is ensured. In the system performance level, the machine with expandable configuration is adopted according to the specific business total amount of the system floor area, so that the subsequent requirement of the business volume increase on performance improvement is met.

Taking nodes deployed by real property and an intermediary mechanism as an example, as shown in fig. 8, an example diagram of block chain link points deployed by adopting a disaster recovery backup mode in the implementation method of the real property transaction system based on block chain provided by the invention is shown, wherein more than two nodes are arranged in the intermediary mechanism and the real property management department, and hot backup is performed on physical machines provided by cloud services. The machine configuration of the invention is determined according to the total business amount of the floor area, and the CPU, the memory and the hard disk of the processor can be expanded, thereby meeting the business amount changing requirement.

Optionally, in the process of applying for the real estate transaction, the local transaction service data includes a process and specific input information of both the buyer and the seller generated by the application, and a process and result information of authentication of both the buyer and the seller generated by the formal application, where the method further includes: configuring a third internal service logic of the data storage unit, wherein the third internal service logic comprises:

And when the business is formally initiated, carrying out true willingness authentication on the buyer and the seller, acquiring the authentication process and the authentication result information of the buyer and the seller, and storing the authentication process and the authentication result information of the buyer and the seller into the blockchain network layer for certification.

It can be understood that the present invention can configure the uplink processing logic of the data storage unit for the transaction service data in the house property transaction passing process, that is, the third internal service logic. As shown in fig. 9, a business logic flow chart for initiating and auditing a pass application is provided for a data storage unit configured in a block chain-based real estate transaction system implementation method according to the present invention, wherein:

And after the input of the pass application information is completed, the process of inputting the buyer and the seller and the specific information are uploaded and stored.

When the business formally initiates the passing of the household, the business and the seller are authenticated in real will, such as the living will authentication of the business and the seller, the mobile phone number authentication and the video interpretation will are added, and the authentication process and the result evidence of the two parties are subjected to the chain and the evidence is stored.

In the period of the passing examination, the real estate staff can check the passing application, willingness confirmation and the evidence-storing data of the key points of the whole transaction process through the real estate evidence-storing unit, and can check whether the evidence-storing data is consistent with the real estate local block chain nodes at the same time, so that whether the data is tampered is confirmed.

When the real intention of the buyer and the seller in the passing of the household is verified, the real intention of the user is ensured by the transaction behavior which occurs before and the evidence storage of the customer in the face recognition and intention interpretation process, and disputes in the passing process are avoided. Meanwhile, through construction of a user remote verification and confirmation process and system capacity, the buyer and the seller can clearly pass through the intention and leave the evidence in a reasonable and compliant mode under the condition of no meeting.

Further, on the basis of the above embodiments, the implementation method of the real estate transaction system based on the blockchain provided by the invention further comprises the following steps: building a service application layer, and configuring fourth internal service logic of the service application layer, wherein the fourth internal service logic comprises: and providing a client or a business system background for the participating subject through the corresponding business system of the participating subject, and completing a corresponding real estate transaction flow according to the operation of the participating subject or staff of the participating subject on the client or the business system background.

It will be understood that, as shown in fig. 2, the blockchain-based real estate transaction system of the present invention may also be configured to include a service application layer, and may configure specific functions and service logic of the service application layer, that is, fourth internal service logic, so that the buyer, the seller, the broker, and the government staff can complete the operation of the existing transaction flow according to the requirements of the government departments through clients such as government affairs, intermediaries, tax, and APP of the bank, and the background of the service system. In the transaction circulation process, the certification storage data related to each organization is communicated with the data certification storage layer through the block chain network layer.

Based on the same inventive concept, the invention also provides a real estate transaction system based on the blockchain according to the above embodiments, wherein the real estate transaction system is realized based on the real estate transaction system realization method based on the blockchain according to the above embodiments. Therefore, the description and the definition in the implementation method of the blockchain-based real estate transaction system in the above embodiments may be used for understanding each module of the blockchain-based real estate transaction system in the present invention, and specific reference may be made to the above method embodiments, which are not repeated herein.

In one embodiment of the present invention, considering that in the actual implementation landing process, because there are many organization nodes to participate (for example, banks handling loans may be multiple banks), the landing period of coordinating multiple organizations to deploy blockchain nodes and the certification system is longer, a simplified version of the implementation may be applied, as shown in fig. 10, which is a second structural frame diagram of the blockchain-based real estate transaction system provided in the present invention, wherein:

(1) Two nodes are deployed in the real estate department and the intermediary organization to form a alliance chain, and data on the chain is commonly maintained and monitored.

(2) The banking and tax nodes mentioned in the above embodiments adopt the following processing manner:

Tax and real estate system are communicated, and tax payment process and result generated by buyer and seller in tax system are linked up through real estate system and real estate block chain node; or according to the specific city condition, the tax paying result informed by the real estate direct tax collection system is used as the basis for evaluating the authenticity of the transaction.

The bank system is communicated with the intermediary system or the real estate system, and the buyer and the seller can carry out face signing and bank batch lending processes and results in the bank system, and can carry out verification on real estate during passing inspection by linking the intermediary system or the real estate system with corresponding blockchain nodes.

The specific ul data field of the bank and tax is consistent with the foregoing.

(3) The simplified scheme is to reasonably simplify the number of the block chain nodes on the basis of ensuring network decentralization and data tamper resistance by combining with specific service conditions, but the core scheme principle and key flow are consistent with the embodiments.

In addition, the house property transaction system based on the blockchain has universal expansibility, namely, the system can be accessed by multiple banks for multiple home mediation institutions, multiple government real property management departments and tax departments. Based on the characteristic of block chain decentralization, each access organization deploys nodes locally, and real estate transaction information requiring certification and synchronization is uplink through the local nodes.

That is, the real estate center departments, tax departments and banks in different cities can independently deploy local nodes to join the alliance chains, and a real estate certificate platform is independently built in each city locally, so that a plurality of intermediaries in each region can be accessed.

For example, as shown in fig. 11, for an exemplary illustration of a new intermediary node joining a real estate transaction system in a implementation method of a blockchain-based real estate transaction system according to the present invention, it is assumed that a city has built a alliance chain including real estate, 1 intermediary, tax and 1 bank, and if another home intermediary is to join, the following processing steps are included:

first, a real estate transaction chain is added.

The new intermediary deploys blockchain nodes locally, joins in a alliance chain node mode, transaction data uploaded by the nodes are communicated with all nodes of the established transaction chain, privacy protection can be set, and other nodes only serve as data storage certificates and cannot check specific data.

And secondly, transmitting the data to a real estate certificate system.

The real estate certificate system function interface of each city is open to all local intermediaries, tax, banking systems. For newly added intermediaries, spare part data can be saved by itself and the uplink is completed. When the transaction data certification page of the real estate certification system is displayed, the real estate certification system calls an intermediary system interface to acquire spare part data texts, and can perform verification with blockchain data. The house property transaction system based on the blockchain has strong universality and higher expandability.

The invention also provides a house property transaction method based on the block chain, which can be realized based on the house property transaction system based on the block chain of the embodiment, wherein the method comprises the step of completing the uplink of transaction business data by utilizing each data storage unit. For example, the agency, bank and tax entrust information, record information for viewing, transaction signing information and loan information, and the tax payment information is registered in the real estate transaction alliance chain when the respective specific business is completed.

Specifically, as shown in fig. 12, fig. 13 and fig. 14, fig. 12, fig. 13 and fig. 14 are respectively a schematic diagram of an intermediate business data uplink flow, a schematic diagram of a banking business data uplink flow and a schematic diagram of a tax business data uplink flow in the house property transaction method according to the present invention. After the transaction business flow generated by the intermediary, the bank and the tax system is completed, the business generation process and result data are uplink in real time. After the data is uplink, the data of each node is automatically synchronized. The real estate center serving as a real estate transfer registration service transacting party can directly acquire and verify the information at the real estate node of the transaction chain, so as to check the authenticity of the transaction flow.

In addition, the real estate side links the key evidences generated by the buyer and the seller in the real estate system, and real estate staff inquires the key evidences of the whole chain through the real estate verification platform during the passing of the home, and simultaneously provides an information verification function for the block chain nodes of the real estate to verify whether the data are tampered or not.

The specific uplink fields of each participant in the real estate transaction can be shown in table 3, which is an exemplary table of specific uplink fields of data in the real estate transaction method of the present invention, including specific fields of intermediary institutions, real estate centers, banks and tax uplink. The business sensitive information data is stored in an encrypted form, the transaction spare parts are stored in a HASH form, and the security of the transaction data is ensured.

Table 3, data uplink concrete field example table in the real estate transaction method of the present invention

As a further aspect of the present invention, the present invention also provides an electronic device according to the above embodiments, where the electronic device includes a memory, a processor, and a program or instructions stored on the memory and executable on the processor, where the processor executes the program or instructions to implement the steps of the blockchain-based real estate transaction system implementation method according to the above embodiments.

Further, the electronic device of the present invention may also include a communication interface and a bus. Referring to fig. 15, a schematic entity structure of an electronic device according to the present invention includes: at least one memory 1501, at least one processor 1502, a communication interface 1503, and a bus 1504.

Wherein the memory 1501, the processor 1502 and the communication interface 1503 perform communication with each other through the bus 1504; the memory 1501 stores programs or instructions executable on the processor 1502, which when executed by the processor 1502, implement the steps of the blockchain-based real estate transaction system implementation method as described in the above embodiments.

The program instructions in the memory 1501 described above may be implemented in the form of software functional units and sold or used as a separate product or stored in a computer readable storage medium. Or all or part of the steps of implementing the above method embodiments may be implemented by hardware related to program instructions, where the foregoing program may be stored in a computer readable storage medium, and when the program is executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The present invention also provides a non-transitory computer readable storage medium having stored thereon a program or instructions that, when executed by a computer, implement the steps of the blockchain-based real estate transaction system implementation method according to the above embodiments.

As a further aspect of the present invention, there is also provided a computer program product according to the above embodiments, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are capable of executing the blockchain-based property transaction system implementation method provided by the above method embodiments.

The electronic device, the non-transitory computer readable storage medium and the computer program product provided by the invention can execute each processing procedure of the real estate transaction system implementation method based on the blockchain described in each embodiment, and can achieve the same technical effect, and are not repeated here.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a usb disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, etc., and includes several instructions for causing a computer device (such as a personal computer, a server, or a network device, etc.) to execute the method described in the foregoing method embodiments or some parts of the method embodiments.

In addition, it will be understood by those skilled in the art that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the description of the present invention, numerous specific details are set forth. It will be appreciated, however, that embodiments of the invention may be practiced without such specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of aiding in the disclosure and understanding of one or more of the various inventive aspects.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The method for realizing the real estate transaction system based on the blockchain is characterized in that the real estate transaction system at least comprises a blockchain network layer and a data storage and certification layer which are in communication connection with each other, and the method comprises the following steps:

Establishing communication connection between a corresponding blockchain node of each of the at least two participating principals and a data storage certification unit so as to establish communication connection between the blockchain network layer and the data storage certification layer;

Configuring second internal business logic of the blockchain node, wherein the second internal business logic comprises the steps of providing the transaction business data evidence to a participating entity associated with the transaction business data evidence in an original form, and providing the transaction business data evidence to a participating entity not associated with the transaction business data evidence in a form of a corresponding hash code; and encrypting the user sensitive data by using a public key, and providing a secret key corresponding to the public key for a participating subject associated with the user sensitive data so as to decrypt the encrypted data and obtain the user sensitive data.

2. The blockchain-based real estate transaction system implementation method of claim 1 wherein the participating principals include at least two of the following principals:

3. The blockchain-based real estate transaction system implementation method of claim 1 or 2 wherein the local transaction business data includes transaction text information and/or transaction spare parts including identification card information of a picture, PDF or audio-video type and electronic contract documents, the implementation method further comprising:

4. The blockchain-based real estate transaction system implementation method of claim 3 further comprising:

The business system of the corresponding participating main body obtains the transaction business data certificate from the blockchain node or the data certificate unit through the system interface;

5. The blockchain-based real estate transaction system implementation method of claim 1 or 2 further comprising:

6. The blockchain-based real estate transaction system implementation method of claim 1 or 2 further comprising:

7. The implementation method of a blockchain-based real estate transaction system according to claim 1, wherein in a process of applying for real estate transaction, the local transaction service data includes a process and specific input information of both parties involved in the transaction, and a process and result information of authentication of both parties involved in the transaction, the implementation method further includes:

and/or the number of the groups of groups,

The implementation method further comprises the following steps:

8. A blockchain-based property transaction system, characterized in that the property transaction system is implemented based on the blockchain-based property transaction system implementation method as claimed in any of claims 1-7.

9. A computer program product comprising a computer program which, when executed by a processor, implements the steps of the blockchain-based real estate transaction system implementation method of any of claims 1-7.