TWI709868B - Data storage method and device based on blockchain - Google Patents

Abstract

One or more embodiments of this specification provide a blockchain-based data storage method and device. The method includes: receiving a candidate block proposed by a target node, and the block header of the candidate block includes an interpretation of the target data Data, the block body of the candidate block includes the content of the target data; initiates a consensus process on the candidate block; responds to the consensus result passed by the candidate block consensus process, the candidate block As the latest block, it is stored in the distributed database of the blockchain to complete the data storage of the target data.

Description

Data storage method and device based on blockchain

This manual is related to the field of network communication technology, especially a method and device for data storage based on blockchain.

In the Internet information age, there are many information flows and a mixture of true and false information. Many false and false information make it difficult for users to distinguish effective and true information. A common situation is various real estate information networks. There may be multiple listings in a set The information released by the intermediary, and the information released by each intermediary is not the same, so it is difficult for users to distinguish what is the real information.

In response to the above-mentioned problems, this specification provides a blockchain-based data storage method, including: receiving a candidate block proposed by a target node, the block header of the candidate block includes interpretation data of the target data, and the candidate block The block body of the block includes the content of the target data; initiates consensus processing on the candidate block; in response to the consensus result passed by the candidate block consensus processing, the candidate block is stored as the latest block Decentralized data to the blockchain Database to complete the data deposit for the target data.

Preferably, the interpretation data includes a unique identifier of the target data; or, a data summary of the unique identifier of the target data.

Preferably, the block body of the candidate block includes instantiated target data.

Preferably, the method further includes: when any target block on the blockchain is connected to multiple sub-blocks, counting the number of sub-blocks on the branch chain where the multiple sub-blocks are located; The branch chain whose number of the sub-blocks first reaches the preset threshold is determined as the main chain of the block chain.

Preferably, the target data is real estate data, and the interpretation data of the target data includes a real estate address or a data summary of the real estate address.

Preferably, the blockchain is a consortium chain, and alliance members of the consortium chain include real estate agency companies.

Preferably, the consensus processing is performed based on the PBFT algorithm.

This specification also provides a block chain-based target data storage device, including: an accepting unit that receives a candidate block proposed by the target node, the block header of the candidate block includes interpretation data of the target data, and the candidate block The block body of the block includes the content of the target data; the initiating consensus unit initiates the consensus processing of the candidate block; the storage unit responds to the consensus result passed by the candidate block consensus processing, and transfers the candidate area The block is stored as the latest block in the distributed database of the blockchain to complete the data storage of the target data.

Preferably, the interpretation data includes a unique identifier of the target data; or, a data summary of the unique identifier of the target data.

Preferably, the block body of the candidate block includes instantiated target data.

Preferably, the device further includes: a main chain determining unit, when any target block on the blockchain is connected with multiple sub-blocks, count the sub-blocks on the branch where the multiple sub-blocks are located The number of sub-blocks; the branch chain whose number of the sub-blocks first reaches the preset threshold is determined as the main chain of the block chain.

Preferably, the target data is real estate data, and the interpretation data of the target data includes a real estate address or a data summary of the real estate address.

Preferably, the blockchain is a consortium chain, and alliance members of the consortium chain include real estate agency companies.

Preferably, the consensus processing is performed based on the PBFT algorithm.

Correspondingly, this specification also provides a computer device, including: a memory and a processor; the memory stores a computer program that can be run by the processor; when the processor runs the computer program, it executes the above-mentioned region-based The steps described in the data storage method of the block chain.

Correspondingly, this specification also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is run by a processor, the steps described in the above-mentioned blockchain-based data storage method are executed.

Apply the blockchain-based data storage methods, devices, computer equipment and computer readable storage media provided in this manual, and use the decentralized blockchain distributed database to store and record data information, abandoning centralization Capital Arbitrary changes to data and information that may occur in the storage of the database; use the consensus processing of the blockchain to identify and store the data, avoiding the situation that users describe the same object (such as real estate) in different network platform servers I don’t know which one is the real defect; and in the multiple embodiments provided in this specification, the interpretation data of the data information is stored in the block header, which makes it more convenient for any block including the light node of the blockchain Retrieval of target data information by chain node equipment.

Blockchain technology, also known as distributed ledger technology, is an emerging technology in which several computing devices participate in "bookkeeping" and jointly maintain a complete distributed database. Because the blockchain technology has the characteristics of decentralization, openness and transparency, each computing device can participate in database recording, and the data can be synchronized quickly between computing devices, making the district Blockchain technology has been widely used in many fields.

In order to overcome the problem that the same piece of data information is released by multiple parties and is difficult to distinguish between true and false in the existing Internet, this manual provides a method for data storage based on blockchain. As shown in Figure 1, the embodiment provided in this specification illustrates a blockchain-based data storage method, including: step 102, receiving a candidate block proposed by a target node, and the block header of the candidate block includes the target data Interpretation data, the block body of the candidate block includes the content of the target data.

The "blockchain" described in the examples provided in this specification can specifically refer to a P2P network system with a distributed data storage structure reached by each node through a consensus mechanism, and the data in the system is obtained through an encryption algorithm For storage or transmission, the data in the blockchain is distributed in time-connected "blocks". The next block contains the data summary of the previous block and is based on the specific consensus mechanism ( Such as POW, POS, DPOS or PBFT, etc.) to achieve full backup of all or part of the node data. Those with ordinary knowledge in the technical field to which the present invention pertains are well known. Because the blockchain system operates under the corresponding consensus mechanism, the data that has been included in the blockchain database is difficult to be tampered with by any node, such as a block using Pow consensus. The blockchain requires at least 51% of the entire network's computing power to attack the existing data. Therefore, the blockchain system has the characteristics of ensuring data security and anti-attack tampering that other centralized database systems cannot match. By storing the data to be certified (target data) on the blockchain, all members or most of the members of the blockchain can recognize the data through consensus, which can effectively prevent the authenticity of the aforementioned data on the Internet. The problem of identification.

The embodiments provided in this manual can run on any device with computing and storage capabilities, such as mobile phones, tablets, PCs (Personal Computers, personal computers), notebook computers, servers and other devices; it can also be run on two devices. Or the logical nodes of two or more devices to realize the functions in the embodiments of this specification.

The target node in the foregoing embodiment refers to a node with data proposal authority in the foregoing blockchain, and the target data refers to the data of the block body to be deposited into the blockchain. The candidate block proposed by the node includes block header and block body. The block header usually encapsulates the current version number of the blockchain system, the address or data summary of the previous block, the data summary of the block body of this block (such as the Merkel Root of the transaction) and other information, which is not included in this manual. limited. In the embodiment provided by the present invention, the block header of the candidate block also encapsulates interpretation data of the target data to describe the target data to be certified.

Interpretation data is data about data, which mainly describes information about data properties, and is used to support functions such as indicating storage locations, historical data, resource search, and document recording. Encapsulate the interpretation data of the target data in the block header, and the data in the block header, such as block summary, interpretation data, etc., can be used as retrieval objects, allowing users to easily know the content of the target data included or recorded in the block, It is convenient to retrieve and find the content of the target data. Moreover, some users of the blockchain system, limited by their own authority or hardware settings, choose to install a client in the form of a light node locally. The light node client usually only saves the blocks of the blockchain within a period of time. In the past, the block header only encapsulated the block summary of the parent block of the block and the mathematical summary of the transaction included in the block body of the block, the light node user cannot know that it is stored locally An overview of the target data stored in the blockchain; the embodiment of this specification provides the embodiment of encapsulating and storing the interpretation data information of the target data in the block header, which can make it more convenient for the light node users to access the data stored in the blockchain Look up and retrieve. In the above-mentioned embodiment provided in this specification, the content of the target data should be stored in the block body of the candidate block proposed by the node of the blockchain. Those with ordinary knowledge in the technical field of the present invention can easily know that the above-mentioned target The content of the data is stored in the block body in the form of "transactions". The transfer described in this manual refers to a piece of data created by the user through the client terminal of the blockchain and needs to be finally released to the distributed database of the blockchain. Among them, transactions in the blockchain are divided into narrow transactions and broad transactions. A narrowly defined transaction refers to a transfer of value issued by a user to the blockchain; for example, in a traditional Bitcoin blockchain network, a transaction can be a transfer initiated by the user in the blockchain. In a broad sense, a transaction refers to a piece of business data with business intent released by a user to the blockchain; for example, an operator can build a consortium chain based on actual business needs, and rely on the consortium chain to deploy other types that are not related to value transfer Online business (for example, rental business, vehicle scheduling business, insurance claims business, credit services, medical services, etc.), and in this type of alliance chain, a transaction can be a business message with business intent issued by the user in the alliance chain Or business request. This manual does not limit the specific content of the transaction, and any form or content of target data can be used as transaction evidence in the blockchain described in this manual. Step 104: Initiate consensus processing on the candidate block. After each node device of the aforementioned blockchain receives the candidate block, the blockchain system should initiate a consensus process on the candidate block. This specification does not limit the consensus mechanism criteria followed by the aforementioned consensus processing, and any consensus mechanism or consensus algorithm that can implement the technical solutions described in the embodiments provided in this specification is within the protection scope of this specification. Hereinafter, this manual uses the PBFT consensus algorithm as an example to briefly describe the above consensus processing process for candidate blocks. The alliance chain usually chooses PBFT as its own consensus mechanism to increase the network throughput. In implementation, before the start of each round of consensus in the blockchain, a master node device can be elected from each node device in the blockchain (for example, a master node device is re-elected for each round of consensus, and other nodes As the slave node device, the master node device initiates a transaction consensus, and is responsible for creating the latest block for the blockchain based on the transaction data (or target data) passed by the consensus. For example, based on the PBFT algorithm, before the start of each round of consensus in the alliance chain, a master node device can be calculated for this round based on the following formula: P=v mod R Among them, P represents the calculated master node number of the current round of consensus; v represents the current view number of the alliance chain; the view number is usually an integer numbered consecutively, indicating that the alliance chain has successfully completed the number of rounds of consensus; for example, after successful completion In a round of consensus, after the elected master node device successfully writes a new block to the alliance chain, the view number can be automatically increased by 1. R represents the total number of node devices in the alliance chain. Each node device can perform the above calculation separately, and match the calculated master node number with the number of the device to determine whether the device is elected as the master node device. On the one hand, if a node device determines that the device is not elected as the master node device, it can broadcast the received transaction submitted by the user to each node device in the alliance chain. On the other hand, if a node device determines that the device is elected as the master node device, it can collect the transactions broadcasted by each user client during the current round of consensus time period, and create a transaction list based on the collected transactions. At this time, the created transaction list is the transaction data proposed by the master node device that requires consensus processing. The PBFT algorithm can generally be divided into three stages: pre-prepare, prepare, and commit. The master node device carries the transaction list in the Pre-Prepare message, and then broadcasts the Pre-Prepare message to each node device in the alliance chain, and broadcasts the complete transaction list to the slaves in the alliance chain that need to participate in the transaction consensus. Node device. The slave node device that receives the above-mentioned Pre-Prepare message can first follow the PBFT algorithm to verify the received Pre-Prepare message to determine whether to accept the received Pre-Prepare message. Among them, in this manual, verifying the received Pre-Prepare message is the process of verifying the content carried in the received Pre-Prepare message; For example, in accordance with the PBFT algorithm, the Pre-Prepare message can carry information such as transaction data to be agreed (target data in this manual), view number v, and digital signature. Correspondingly, in this manual, when verifying the Pre-Prepare message, the following verification process can be specifically performed: 1) Verify that the view number V is consistent with the view number recorded locally; 2) Verify the digital signature in the Pre-Prepare message; 3) Verify the validity of the target data carried in the Pre-Prepare message; The above verification of the validity of the target data can be understood as the verification of the accuracy and validity of the target data by each slave node device, in order to obtain a copy of the target data before the target data is officially included in the blockchain. The target data for the approval of the majority of the members of the chain (in the PBFT algorithm, at least the approval of 2F+1 members, and F is the Byzantine fault tolerance of the blockchain system). When a node device that receives the above-mentioned Pre-Prepare message performs the verification process listed above, if the verification passes, it means that the node device accepts the above-mentioned Pre-Prepare message (recognizes the above-mentioned target data), and the node device can Enter the Prepare phase of the PBFT agreement, broadcast and send a Prepare message for confirming the above Pre-Prepare message to other nodes in the alliance chain; wherein, the content format carried in the above Prepare message can be the same as the above Pre-Prepare The message remains consistent. Each node device can also receive Prepare messages broadcasted by other slave node devices, and verify the received Prepare messages to determine whether to accept the received Prepare messages. Among them, the specific process of verifying the received Prepare message can refer to the specific process of verifying the Pre-Prepare message, which will not be repeated in this specification. After the node device in the alliance chain broadcasts and sends the commit message to the other node devices in the alliance chain, it can also receive the commit message broadcasted by other node devices, and verify the received commit message to determine whether to accept Commit message received. Among them, the content format carried in the commit message can be consistent with the Pre-Prepare message and the Prepare message. Among them, the specific process of verifying the received commit message can refer to the specific process of verifying the Pre-Prepare message, which will not be repeated in this specification. If the verification is passed, it means that the node device accepts the received commit message. The node device can further determine whether the number of received commit messages broadcasted by other node devices reaches 2F+1 (including the commit message broadcast by itself). Information), F is the Byzantine fault tolerance of the blockchain system. Through the above consensus process, all node devices of the blockchain have obtained a target data recognized by most node devices, avoiding the situation that users describe the target data of the same object in different network platform servers. Do the same without knowing which one is the real defect. Step 106: In response to the consensus result of the candidate block consensus process, the candidate block is stored as the latest block in the distributed database of the blockchain to complete the data storage for the target data. certificate. The consensus processing mechanism of the blockchain and the mechanism of distributed storage and backup ensure that it is difficult for any user to tamper with the approved target data, thereby providing evidence for users to obtain true and effective data. For example, a blockchain using Pow consensus requires at least 51% of the entire network's computing power to tamper with existing data. Therefore, the blockchain system has incomparable guarantees of data security and protection against attack and tampering that other centralized database systems cannot match. Characteristics. The above-mentioned blockchain adopting PBFT consensus, through the confirmation of transaction data by the master node and the slave node, achieves a strong consistency of transaction data across the entire chain, thus avoiding users from different network platform servers for the same object The situation described by the target material is not the same, and it is not known which one is the real defect. By storing the data to be certified (target data) on the blockchain, all members or most of the members of the blockchain can recognize the data through consensus, which can effectively prevent the authenticity of the aforementioned data on the Internet. Problem of discrimination In another illustrated embodiment, the interpretive data information of the target data encapsulated and included in the block header includes the unique identification of the target data, or the data summary of the unique identification of the target data, which makes it more convenient for the blockchain client user to check Retrieval of information contained in the blockchain. In the following, an example of the business situation where the blockchain serves as a deposit certificate for real estate information is used to discuss the embodiments of the technical solution. For the same feature of the same property, such as area, house type, quotation, etc., a unique description should be guaranteed on the Internet to prevent any user from having different descriptions of the same feature of the same property information when inquiring about the property information. Difficult to distinguish authenticity. In order to reduce the confirmation time of the transaction or target data, increase the transaction throughput, and meet the requirements for security and performance, the alliance chain architecture is usually used to construct the blockchain. In the above-mentioned business situation of buying and selling real estate, institutions with higher credit such as real estate agency companies and housing transaction supervision agencies can serve as alliance member nodes of the alliance chain and participate in block accounting. For example, the consensus process of the alliance chain can refer to the aforementioned consensus process based on the PBFT algorithm. The consortium chain can determine the degree of openness to the public according to the application situation, and grant access to the consortium chain to open institutions or individuals. The accessible nodes can also be divided into general nodes and light nodes. Light nodes generally do not It has the authority to participate in the accounting of the alliance chain, and generally saves the block header data of the block of the alliance chain in a period of time to save storage space.

The PBFT algorithm, as a preferred implementation of the consensus algorithm of the alliance chain provided in this specification, is due to the high efficiency of adopting this algorithm consensus and can meet the needs of high-frequency trading volume. For example, in this embodiment Real estate agency companies frequently generate real estate information (transactions); and the consensus delay is very low, which basically meets the requirements of real-time processing, and can quickly and instantly collect the above-mentioned real estate information in the new block of the blockchain; moreover, the alliance Trusted nodes in the chain network, such as real estate transaction regulators, serve as pre-selected accounting nodes, taking into account security and stability; in addition, the use of PBFT algorithm will not consume too much computer computing resources, and does not necessarily require token circulation , So it has good workability.

Through the consensus mechanism of the block chain, it can be ensured that for the same feature of the same real estate information (such as the quotation information of the house), only one description after the consensus of the member nodes is stored on the block chain. In the above business situation, the above-mentioned interpretation information contained in the block header of each block of the alliance chain can be the address information of the real estate, or the digital summary of the real estate address such as hash value, because the address information of the real estate is unique to a real estate Sexual identification, through the information can be unique Identify a property. After the user retrieves the address information of the real estate or the hash value of the real estate address in the blockchain database containing the block header through the client, one or more blocks corresponding to the real estate can be obtained, and then the query found Query the specific information of the real estate in the block of the block, such as house address, real estate owner information, house type, area, price, etc.

It is worth noting that, in order to facilitate the application of the data storage method provided in this manual in different business situations, the target data information or transaction information contained in the block body can adopt a format that is instantiated according to the business situation, for example, in the above In the block body of the blockchain of the business situation for depositing real estate information, as shown in Figure 2, the content of the real estate can be set up for instance content templates including address, house type, area, real estate owner, and quotation information. Further, you can also set the instantiation description of the format of "xx street xx room, xx district, xx city, xx province, xx province" for the address of the house, and set the instantiation description of the format of "xx room xx hall xx bathroom xx balcony" for the house type Description, etc., so that the real estate agency will not omit certain important information when proposing a candidate block of target real estate information, so that all information about the target real estate information is stored in the same block, which is more Convenient user access.

The above embodiment proposes that through the consensus mechanism of the blockchain, it can be ensured that for the same feature of the same real estate information (such as housing quote information), only one description after the consensus of the member nodes is stored on the blockchain , But it does not rule out that in very rare cases, due to the specific consensus mechanism adopted by the blockchain, different real estate agencies have different descriptions of the same feature of the same real estate information are included in the above block The chain, that is, the above-mentioned block chain is bifurcated: that is, there is more than one sub-block connected to a certain target block on the block chain. In this case, an embodiment of this specification provides the following solution to solve the above-mentioned bifurcation problem: when any target block on the blockchain is connected to multiple sub-blocks, count the multiple sub-blocks The number of sub-blocks on the branch chain where the block is located; the branch whose number of the sub-blocks first reaches a preset threshold is determined as the main chain of the blockchain. The larger the number of blocks on the branch chain after the fork, it can be expressed as the faster the consensus of the information contained in the block on the branch chain is recognized, and the node members of the blockchain are used to compare different sub-zones after the fork. The recognition level and recognition speed of the block quickly solve the bifurcation problem of the blockchain. The above embodiments provided in this manual, through the mechanism that the data recorded on the blockchain is the consensus of multiple member node devices of the blockchain, it provides a unique and non-tamperable mechanism for the target data recorded on the blockchain In addition, the block header of the above-mentioned block chain contains the interpretation data information about the target data, which makes it more convenient to query and obtain the above-mentioned target data. Corresponding to the implementation of the above process, the embodiment of this specification also provides a data storage device based on blockchain. The device can be implemented through software, or through hardware or a combination of software and hardware. Taking software implementation as an example, as a logical device, it is formed by reading the corresponding computer program instructions into the memory through the CPU (Central Process Unit) of the device where it is located. From the perspective of hardware, in addition to the CPU, memory, and memory shown in Figure 4, the equipment where the data processing device is located usually includes other hardware such as chips for wireless signal transmission and reception, and/or Other hardware such as boards to realize network communication functions. Figure 3 shows a block chain-based data storage device 30 provided in this specification, including: The accepting unit 302 receives a candidate block proposed by the target node, the block header of the candidate block includes the interpretation data of the target data, and the block body of the candidate block includes the content of the target data; Initiating a consensus unit 304 to initiate consensus processing on the candidate block; The storage unit 306, in response to the consensus result passed by the candidate block consensus process, stores the candidate block as the latest block in the distributed database of the blockchain to complete the data for the target data Deposit evidence. Preferably, the interpretation data includes a unique identifier of the target data; or, a data summary of the unique identifier of the target data. Preferably, the device 30 further includes: The main chain determining unit 308, when any target block on the blockchain is connected with multiple sub-blocks, count the number of sub-blocks on the branch chain where the multiple sub-blocks are located; The branch chain whose number reaches the preset threshold first is determined as the main chain of the blockchain. Preferably, the target data is real estate data, and the interpretation data of the target data includes a real estate address or a data summary of the real estate address. Preferably, the blockchain is a consortium chain, and alliance members of the consortium chain include real estate agency companies. For the implementation process of the functions and roles of each unit in the above-mentioned device, please refer to the implementation process of the corresponding steps in the above-mentioned method. Apply the blockchain-based data storage device provided in this manual, use the decentralized blockchain distributed database to store and store data information, and abandon the arbitrary data information that may occur in centralized database storage Changes; the use of the blockchain consensus mechanism to identify and store data, avoiding the defect that users describe the same object (such as real estate) in different network platform servers and do not know which one is true. ; And in the multiple embodiments provided in this specification, the interpretation data of the data information is stored in the block header, which is more convenient for any blockchain node equipment including the blockchain light node to retrieve the target data information. The device embodiments described above are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical modules, that is, It can be located in one place, or it can be distributed across multiple network modules. Some or all of the units or modules can be selected according to actual needs to achieve the objectives of the solution in this specification. Those with ordinary knowledge in the technical field to which the present invention belongs can understand and implement it without creative work. The devices, units, and modules described in the foregoing embodiments may be specifically implemented by computer chips or entities, or implemented by products with certain functions. A typical implementation device is a computer. The specific form of the computer can be a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email receiving and sending device, and a game. Console, tablet, wearable device, or a combination of any of these devices. Corresponding to the foregoing method embodiments, the embodiments of this specification also provide a computer device, which includes a memory and a processor. Wherein, the memory stores a computer program that can be run by the processor; when the processor runs the stored computer program, each step of the data center based on the blockchain-based data storage method in the embodiment of this specification is executed. Please refer to the previous content for a detailed description of each step of the data center's blockchain-based data storage method, and will not be repeated. Corresponding to the above-mentioned method embodiments, the embodiments of this specification also provide a computer-readable storage medium on which computer programs are stored. When these computer programs are run by a processor, they execute the data center in the embodiments of this specification. The various steps of the blockchain-based data storage method. Please refer to the previous content for a detailed description of each step of the data storage method based on the blockchain based on the data center, and will not be repeated. The above descriptions are only preferred embodiments of this specification, and are not intended to limit this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included in this specification Within the scope of protection. In a typical configuration, the computing device includes one or more processors (CPU), input/output interfaces, network interfaces, and memory. Memory may include non-permanent memory in computer-readable media, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory ( flash RAM). Memory is an example of computer-readable media. Computer-readable media includes permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), and other types of random access memory (RAM) , Read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only CD-ROM (CD-ROM), digital multi-function Optical discs (DVD) or other optical storage, magnetic cassettes, magnetic tape storage or other magnetic storage devices, or any other non-transmission media, can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transient computer-readable media (transitory media), such as modulated data signals and carrier waves. It should also be noted that the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, product or equipment including a series of elements not only includes those elements, but also includes Other elements that are not explicitly listed, or include elements inherent to this process, method, commodity, or equipment. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, commodity, or equipment that includes the element. Those with ordinary knowledge in the technical field to which the present invention pertains should understand that the embodiments of this specification can be provided as methods, systems or computer program products. Therefore, the embodiments of this specification may adopt the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of this specification can adopt computer programs implemented on one or more computer-usable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer-usable program codes. The form of the product.

30‧‧‧Device 302‧‧‧Receiving Unit 304‧‧‧Initiated consensus unit 306‧‧‧Storage Unit

Fig. 1 is a flowchart of a method for depositing data based on blockchain according to an exemplary embodiment of this specification; Fig. 2 is a block chain used for depositing real estate information provided by an exemplary embodiment of this specification. Block content schematic diagram; Figure 3 is a schematic diagram of a blockchain-based data storage device provided by an exemplary embodiment of this specification; Figure 4 is an embodiment of the blockchain-based data storage device provided by this specification A kind of hardware structure diagram.

Claims (14)

A data storage method based on blockchain, the method comprising: receiving a candidate block proposed by a target node, the block header of the candidate block includes interpretation data of the target data, and the block body of the candidate block includes the target data Content; initiate consensus processing on the candidate block; in response to the consensus result passed by the candidate block’s consensus processing, store the candidate block as the latest block in the distributed database of the blockchain to complete the target Data storage of the target data; when any target block on the blockchain is connected to multiple sub-blocks, count the number of sub-blocks on the branch chain where the multiple sub-blocks are located; and the sub-block The branch chain whose number reaches the preset threshold first is determined as the main chain of the blockchain. As in the method described in claim 1, the interpretive data includes the unique identification of the target data; or, a data summary of the unique identification of the target data. According to the method of claim 1 or 2, the block body of the candidate block includes instantiated target data. As in the method described in claim 1, the target data is real estate data, and the interpretive data of the target data includes the real estate address or a data summary of the real estate address. According to the method described in claim 4, the blockchain is a consortium chain, and the consortium members of the consortium chain include real estate agency companies. According to the method described in claim 5, the consensus processing is performed based on the PBFT algorithm. A block chain-based target data storage device, the device comprising: an accepting unit that receives a candidate block proposed by the target node, the block header of the candidate block includes interpretation data of the target data, and the block body of the candidate block Including the content of the target data; initiating a consensus unit to initiate consensus processing on the candidate block; a storage unit, in response to the consensus result of the candidate block consensus processing, storing the candidate block as the latest block in the area The distributed database of the block chain to complete the data storage for the target data; and the main chain determination unit, when any target block on the block chain is connected to multiple sub-blocks, count the multiple sub-blocks The number of sub-blocks on the branch chain; and the branch chain whose number of sub-blocks first reaches the preset threshold is determined as the main chain of the blockchain. For the device described in claim 7, the interpretive data includes a unique identifier of the target data; or, a data summary of the unique identifier of the target data. For the device according to claim 7 or 8, the block body of the candidate block includes The instantiated target data. For the device described in claim 7, the target data is real estate data, and the interpretive data of the target data includes the real estate address or a data summary of the real estate address. According to the device described in claim 10, the blockchain is an alliance chain, and the alliance members of the alliance chain include real estate agency companies. In the device described in claim 11, the consensus processing is performed based on the PBFT algorithm. A computer device includes: a memory and a processor; the memory stores a computer program that can be run by the processor; when the processor runs the computer program, the processor executes any one of claims 1 to 6 method. A computer-readable storage medium has a computer program stored thereon, and when the computer program is run by a processor, the method as described in any one of claim items 1 to 6 is executed.

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