CN109242292A - A kind of asset evaluation method, block chain node device and system - Google Patents
A kind of asset evaluation method, block chain node device and system Download PDFInfo
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Abstract
This application discloses a kind of asset evaluation method, block chain node device and systems, applied to block chain node device, block chain node device access area block chain network, block chain network includes multiple block chain node devices, and method includes: the assets assessment demand for receiving the first terminal of asset owner and sending；Assets assessment demand includes: assets model；According to the target information for the multiple qualification reports comprising appraiser being stored in advance in block chain network, determine that an at least qualification report includes the first alternative appraiser of assets model from multidigit appraiser；The qualification that the target block chain node device sends the second alternative appraiser is reported to the first terminal；The second alternative appraiser is included in the described first alternative appraiser；The qualification report of the second alternative appraiser selects goal-based assessment teacher from the described second alternative appraiser for the asset owner.Using the application, it can be achieved that information reliable memory.
Description
Technical Field
The application relates to the technical field of block chain application, in particular to an asset evaluation method, block chain link point equipment and a system.
Background
In the prior art, a large amount of important data or online transaction records are stored in a trusted third-party platform or mechanism, but the storage mode relying on a central server has a certain risk. Taking the qualification report of the vehicle evaluator as an example, the qualification report of the vehicle evaluator is stored in a server provided by a vehicle evaluation enterprise or a third-party data platform; when the owner of the vehicle inquires the qualification report of the vehicle evaluator through a data interface provided by the vehicle evaluation enterprise or a third-party data platform. Since the qualification report of the vehicle evaluator exists in a single server, the manager of the qualification report of the vehicle evaluator may make a false qualification report of the vehicle evaluator or modify the qualification report of the vehicle evaluator for the benefit, so that the owner of the vehicle cannot obtain information such as a true and reliable qualification report of the vehicle evaluator.
Disclosure of Invention
The application provides an asset evaluation method, block chain node equipment and a system, which can realize reliable storage of information such as qualification reports of evaluators and provide real and reliable data information for information users.
In a first aspect, the present application provides an asset assessment method applied to a blockchain node device, where the blockchain node device accesses a blockchain network, and the blockchain network includes a plurality of blockchain node devices, where the asset assessment method includes:
the method comprises the steps that target block chain node equipment receives asset evaluation requirements of an asset owner, wherein the asset evaluation requirements are sent by a first terminal of the asset owner; the asset assessment requirements include an asset model number;
and the target block chain node equipment determines at least one qualification report from a plurality of evaluators to perform asset evaluation according to a plurality of target information which is stored in the block chain network in advance and contains qualification reports of evaluators, wherein the qualification reports comprise the first candidate evaluators of the asset models.
In combination with the first aspect, in some possible embodiments,
the method for determining at least one qualification report including the asset model from a plurality of evaluators by the target blockchain node device according to a plurality of target information including qualification reports of evaluators stored in the blockchain network in advance includes the following steps:
the target block chain node equipment receives evaluation information of the multiple asset owners sent by second terminals of the multiple asset owners and qualification certification information of the multiple evaluators sent by the second terminals of the multiple evaluators respectively;
the target block chain node equipment respectively generates qualification reports of the multiple evaluators according to the evaluation information of the multiple asset owners and qualification certification information of the multiple evaluators, and generates unique identifiers of the multiple qualification reports according to characteristic values extracted from the multiple qualification reports;
the target block chain node device sends a plurality of target information to other block chain node devices in the block chain network except the target block chain node device, so that the other block chain node devices verify the plurality of target information, wherein the target information comprises: (ii) a qualification report of the evaluator and a unique identification of the qualification report;
if the target information passes the verification, the target block chain node equipment generates a target block containing the target information;
and the target block chain node equipment writes the target block into the block chain network.
In combination with the first aspect, in some possible embodiments,
the characteristic values include at least:
an identity number of the evaluator, an index of qualification reports of the evaluator.
In combination with the first aspect, in some possible embodiments,
the target block chain node device generates qualification reports of the multiple evaluators according to the evaluation information of the multiple asset owners and qualification certification information of the multiple evaluators, and generates unique identifiers of the multiple qualification reports according to feature values extracted from the multiple qualification reports, and the method specifically includes:
and the target block chain node equipment respectively generates qualification reports of the multiple appraisers according to the evaluation information of the multiple asset owners and the qualification certification information of the multiple appraisers, respectively performs hash operation on the characteristic values extracted from the qualification reports, and respectively uses the hash values after the hash operation as unique identifiers of the qualification reports.
In combination with the first aspect, in some possible embodiments,
the method for verifying the target information by the target block chain node device includes that the target block chain node device sends a plurality of target information to other block chain node devices in the block chain network except the target block chain node device, so that the other block chain node devices verify the plurality of target information, and specifically includes:
the target block chain node equipment sends a plurality of target information to other block chain node equipment except the target block chain node equipment in the block chain network, so that the first block chain node equipment performs Hash operation on the characteristic value of the qualification report in the first target information according to a Hash function used when the target block chain node equipment generates the unique identifier of the first target information, and compares the Hash value after the Hash operation with the received unique identifier of the first target information sent by the target block chain node equipment; the first target block chain node device is any block chain node device in the block chain network except the target block chain node device, and the first target information is any target information in the plurality of target information;
and if the hash value after the hash operation is the same as the received unique identifier of the first target information sent by the target block chain node equipment, the first target information passes verification.
In combination with the first aspect, in some possible embodiments,
the determining at least one qualification report from the plurality of evaluators to perform asset assessment by a first candidate evaluator comprising the asset model, further comprising:
the target block chain node equipment respectively sends asset assessment requirement prompts to second terminals of the first alternative evaluators;
and the target block chain node equipment determines at least one second alternative evaluator responding to the asset evaluation requirement prompt from the first alternative evaluators.
In combination with the first aspect, in some possible embodiments,
after the block chain node device sends the qualification report of the second candidate evaluator to the first terminal, the method further includes:
the target block chain node equipment receives a query request which is sent by the first terminal and contains target information of a qualification report of an evaluator;
the target block chain node equipment judges whether the query request contains a condition meeting an intelligent contract;
and if so, the target block chain node equipment sends the target information to the first terminal.
In a second aspect, the present application provides a block link point device, which is the target block link point device, comprising:
the block chain node device is the target block chain node device, and includes:
the system comprises a first receiving unit, a second receiving unit and a control unit, wherein the first receiving unit is used for receiving asset evaluation requirements of an asset owner, which are sent by a first terminal of the asset owner; the asset assessment requirements include: an asset model number;
the determining unit is used for determining at least one qualification report including a first alternative evaluator of the asset model from a plurality of evaluators according to target information of the qualification reports of the evaluators stored in the blockchain network in advance;
the first sending unit is used for reporting the qualification of the second alternative evaluator to the first terminal; the second candidate evaluator is included in the first candidate evaluator; the qualification report of the second candidate evaluator is used by the asset owner to select a target evaluator from the second candidate evaluators.
In combination with the second aspect, in some possible embodiments,
further comprising:
the second receiving unit is used for respectively receiving the evaluation information of the plurality of asset owners sent by the second terminals of the plurality of asset owners and the qualification certification information of the plurality of evaluators sent by the second terminals of the plurality of evaluators;
the first generation unit is used for respectively generating qualification reports of the multiple evaluators according to the evaluation information of the multiple asset owners and the qualification certification information of the multiple evaluators, and generating unique identifiers of the multiple qualification reports according to characteristic values extracted from the multiple qualification reports;
a second sending unit, configured to send multiple pieces of target information to other block link point devices in the block chain network except the target block link point device, so that the other block link point devices verify the multiple pieces of target information, where the target information includes: (ii) a qualification report of the evaluator and a unique identification of the qualification report;
a second generating unit configured to generate a target block including the plurality of target information if the plurality of target information is verified;
a writing unit for writing the target block into the block chain network.
In a third aspect, the present application provides a block link point device, where the block link node device is the target block link point device, and the block link node device includes: a transceiver, a memory and a processor coupled to the memory, the transceiver, the memory and the processor coupled to the memory being interconnected, wherein the transceiver is configured to perform a receiving or transmitting action, the memory is configured to store implementation code for an asset assessment method, and the processor is configured to invoke the implementation code stored in the memory, i.e., perform the asset assessment method of the first aspect.
In a fourth aspect, the present application provides an asset assessment system comprising: the system comprises a plurality of block chain node devices and a plurality of terminals corresponding to each block chain node device in the plurality of block chain node devices, wherein the block chain node devices are target block chain node devices in the first aspect and various possible implementation manners thereof, and the terminals are first terminals or second terminals in the first aspect and various possible implementation manners thereof.
In a fifth aspect, the present application provides a computer-readable storage medium having instructions stored thereon, which, when executed by a processor, cause the processor to perform the asset assessment method provided by the first aspect and any of its various possible implementations.
In a sixth aspect, the present application provides a computer program product which, when executed by a processor, causes the processor to perform the asset assessment method provided by any of the first aspect and its various possible implementations.
The application provides an asset assessment method and block chain node equipment, and the method comprises the following steps that firstly, target block chain node equipment receives asset assessment requirements of an asset owner, which are sent by a first terminal of the asset owner; asset assessment requirements include: an asset model number. Furthermore, the target blockchain node device determines at least one first candidate evaluator with the qualification report including the vehicle model from the plurality of evaluators according to a plurality of target information containing the qualification reports of the evaluators, which are stored in the blockchain network in advance. And then, the target block chain node equipment respectively sends asset assessment requirement prompts to a second terminal of the first alternative evaluator. Finally, the target block chain node equipment determines at least one second alternative evaluator responding to the asset evaluation demand prompt from the first alternative evaluators, and sends the qualification report of the second alternative evaluator to the first terminal; the qualification report of the second candidate evaluator is used by the property owner to select a target evaluator from the second candidate evaluators. By adopting the method and the device, the reliable storage of the qualification report of the evaluator can be realized, and the real and reliable qualification report of the evaluator is provided for the information user.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of an asset valuation system provided herein;
FIG. 2 is a schematic diagram of a portion of an asset valuation system provided herein;
FIG. 3 is a schematic flow chart diagram of an asset valuation method provided herein;
FIG. 4 is a schematic illustration of a qualification report of a vehicle evaluator provided herein;
FIG. 5 is a block chain network structure provided herein;
FIG. 6 is a diagram illustrating the relationship between hash values stored on blocks in a blockchain network according to the present application;
FIG. 7 is a schematic view of an operator interface provided herein;
FIG. 8 is a schematic block diagram of a block link point apparatus provided herein;
fig. 9 is a schematic block diagram of another blockchain node device provided herein.
Detailed Description
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are some, not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
In particular implementations, the terminals described herein include, but are not limited to, other portable devices such as mobile phones, laptop computers, or tablet computers having touch sensitive surfaces (e.g., touch screen displays and/or touch pads). It should also be understood that in some embodiments, the device is not a portable communication device, but is a desktop computer having a touch-sensitive surface (e.g., a touch screen display and/or touchpad).
In the discussion that follows, a terminal that includes a display and a touch-sensitive surface is described. However, it should be understood that the terminal may include one or more other physical user interface devices such as a physical keyboard, mouse, and/or joystick.
The terminal supports various applications, such as one or more of the following: a drawing application, a presentation application, a word processing application, a website creation application, a disc burning application, a spreadsheet application, a gaming application, a telephone application, a video conferencing application, an email application, an instant messaging application, an exercise support application, a photo management application, a digital camera application, a web browsing application, a digital music player application, and/or a digital video player application.
Various applications that may be executed on the terminal may use at least one common physical user interface device, such as a touch-sensitive surface. One or more functions of the touch-sensitive surface and corresponding information displayed on the terminal can be adjusted and/or changed between applications and/or within respective applications. In this way, a common physical architecture (e.g., touch-sensitive surface) of the terminal can support various applications with user interfaces that are intuitive and transparent to the user.
Referring to fig. 1, a schematic diagram of an asset valuation system provided by the present application, as shown in fig. 1, may include: the terminal comprises a plurality of block chain node devices and a plurality of terminals corresponding to the block chain node devices in the block chain node devices respectively.
It should be noted that the target blockchain node device is a blockchain node device in a blockchain network, and for example, the target blockchain node device is a blockchain node device a, where the blockchain node device a corresponds to a region a, and the blockchain network may further include a blockchain node device B, where the blockchain node device B corresponds to a region B. For convenience of description, the present application will take a target blockchain node device corresponding to the area a as an example.
The asset assessment system will be described in detail below by taking a target blockchain node device in the asset assessment system as an example.
Fig. 2 is a schematic diagram illustrating a partial structure of the asset evaluation system.
As shown in fig. 2, the partial structure may include:
a target blockchain node device, and a first terminal and a second terminal corresponding to the target blockchain node device. Wherein,
the first terminal and the second terminal may be terminals in an information processing system, and the terminals may refer to an access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile terminal, a user terminal, a wireless communication device, a user agent, or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a conference initiation protocol telephone, a wireless local loop station, a personal digital assistant, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a wearable device, or a terminal device in a future-evolving public land mobile network.
In an asset valuation system, may include: the system comprises an information provider, an asset assessment demander and an information processor. In the embodiment of the application, a first terminal is taken as an asset evaluation demander, a second terminal is taken as an information provider, and a target block link point device is taken as an information processor.
In the embodiment of the application, a vehicle owner can log in the asset evaluation requirement client to input the registration information into the first terminal, the first terminal sends the registration information to the target block chain node device, and then the target block chain node device obtains a private key which is set by an asset owner and used for logging in the asset evaluation requirement client, and stores the private key.
And the evaluator can log in the information providing client to input the registration information into the second terminal, the second terminal sends the registration information to the target block chain node equipment, and then the target block chain node equipment obtains a private key for logging in the information providing client and stores the private key.
It should be noted that the asset owner may log in the information providing client to input the registration information to the second terminal, and the second terminal sends the registration information to the target blockchain node device, and then the target blockchain node device obtains the private key for logging in the information providing client and stores the private key.
Furthermore, after the asset owner finishes registering on the target block link point device through the first terminal of the asset owner, the asset owner can log in the asset evaluation requirement client to input the asset evaluation requirement to the first terminal of the asset owner, after the asset owner finishes registering on the target block link point device through the second terminal of the asset owner, the asset owner can also log in the information providing client to input the evaluation information of the asset owner to the second terminal of the asset owner, and after the evaluator finishes registering on the target block link point device through the second terminal of the evaluator, the evaluator can input the qualification certification information of the evaluator to the second terminal of the evaluator through the information providing client.
It should be noted that the client may include: an application running locally, a function running on a Web browser (also called Web App), an applet embedded in an email, an applet embedded in client software for instant messaging (e.g. WeChat), and a function embedded in another application (e.g. WeChat) (e.g. WeChat public number), etc. For the client, a corresponding target blockchain node device end program needs to be run on the target blockchain node device to provide corresponding services, such as database services, data calculation, decision execution, and the like.
In this embodiment, the target block chain node device may also be referred to as a background block chain node device, a component block chain node device, and the like, and the target block chain node device may perform communication connection with the second terminal of the evaluator that may send the qualification information of the evaluator, the second terminal of the asset owner that sends the evaluation information of the asset owner, and the first terminal of the asset owner that sends the asset evaluation requirement through the internet, and may respond to the received qualification information of the evaluator, the evaluation information of the asset owner, and the asset evaluation request.
It should be noted that the target block chain node device receives the asset assessment requirement of the asset owner sent by the first terminal of the asset owner; asset assessment requirements include asset model numbers. Furthermore, the target block chain node device determines at least one qualification report including a first candidate evaluator of the vehicle model from the plurality of evaluators for evaluation according to a plurality of target information including qualification reports of the evaluators stored in the block chain network in advance. Then, the target blockchain node devices respectively send asset assessment requirement prompts to the second terminals of the first alternative evaluators. Finally, the target block chain node equipment determines at least one second alternative evaluator responding to the asset evaluation demand prompt from the first alternative evaluators, and sends the qualification report of the second alternative evaluator to the first terminal; the qualification report of the second candidate evaluator is used by the property owner to select a target evaluator from the second candidate evaluators. By adopting the method and the device, the reliable storage of the qualification report of the evaluator can be realized, and the real and reliable qualification report of the evaluator is provided for the information user.
The blockchain has the following three properties: firstly, a block chain is a distributed database system placed in an insecure environment; secondly, ensuring that the existing data is not tampered by adopting a hash function mode; and thirdly, adopting a consensus algorithm to achieve consensus on the newly added data.
The embodiments of the present application mainly relate to the property of tamper resistance, that is, to ensure that target information stored on a blockchain is not tampered by using a hash function.
It should be noted that the hash function has the following properties, and if X is hashed to obtain Y ═ h (X): x is known to be easy to derive, while Y is known to be unable to derive X, specifically, another X1 is not present, so that H (X1) ═ Y. That is, the hash function has irreversibility.
Referring to fig. 3, fig. 3 is a schematic flow chart of an asset assessment method provided by an embodiment of the present application.
As shown in FIG. 3, the following detailed description of the asset valuation method provided by the asset valuation system can include at least the following steps:
s301, receiving asset evaluation requirements of an asset owner, which are sent by a first terminal of the asset owner, by target block chain node equipment; asset assessment requirements include: an asset model number.
In an embodiment of the present application, the asset assessment requirement includes: besides the asset models, the method can also comprise the following steps: age of the asset, etc.
Assets may include, but are not limited to: a vehicle, a house, a computer or a mobile phone, etc.
Correspondingly, if the asset is a vehicle, the owner of the asset is the owner of the vehicle, the model of the asset is the model of the vehicle (such as Civic's thought of the tenth generation of Honda), and the evaluator is the evaluator of the vehicle.
Correspondingly, if the property is a house, the property owner is a house owner, the property model is a house type (such as three rooms and one hall), and the evaluator is a house evaluator.
Correspondingly, if the asset is a mobile phone, the owner of the asset is the owner of the asset, the model of the asset is the model of the mobile phone (such as the charm MX4), and the evaluator is the mobile phone evaluator.
The first terminal may store the asset assessment requirements in, but not limited to, the following two ways.
The first mode is as follows: and storing the asset evaluation requirement in a cloud database connected with the first terminal.
The second mode is as follows: the asset assessment requirements are stored in an internal memory of the first terminal.
S302, the target block chain node equipment determines at least one first candidate evaluator with the qualification report including the asset model from a plurality of evaluators according to a plurality of target information which is stored in a block chain network in advance and contains the qualification reports of the evaluators.
In this embodiment of the present application, the target blockchain node device determines, according to a plurality of target information including qualification reports of evaluators stored in advance in a blockchain network, that at least one qualification report includes a first candidate evaluator of an asset model from among a plurality of evaluators, and further includes the following working procedures:
the first process is as follows: and the target block chain node equipment respectively receives the evaluation information of the plurality of asset owners sent by the second terminals of the plurality of asset owners and the qualification information of the plurality of evaluators sent by the second terminals of the plurality of evaluators.
Specifically, the first method: the qualification information of the evaluator is stored in an internal memory of a second terminal of the evaluator.
The second mode is as follows: and storing the qualification certification information of the evaluator in a cloud database connected with a second terminal of the evaluator.
Similarly, the second terminal may store the asset owner's rating information in, but not limited to, the following two ways.
The first mode is as follows: the evaluation information of the property owner is stored in the internal memory of the second terminal of the owner of the vehicle.
The second mode is as follows: and storing the evaluation information of the asset owner in a cloud database connected with a second terminal of the asset owner.
It should be noted that the qualification information of the evaluator may include, but is not limited to, the following:
the qualification certificate of the evaluators, the evaluation history certification of the evaluators and corresponding evaluation asset conditions (such as asset unique identification, asset service life and the like), asset transaction conditions (asset original price, asset evaluation and asset final transaction price), evaluation contract information, video information during asset evaluation and the like.
The asset owner's rating information may include, but is not limited to, the following:
the evaluation information of the property owner to the evaluator, the feedback information of the transaction parties to the evaluation result and the related contract information.
It should be noted that the difference between the valuation and the final bid price of the asset can be used by the target blockchain node device to determine the star rating of the evaluator. For example, the target block chain node device may form a difference value queue according to the difference value between the asset evaluation price given by the evaluator each time and the final asset bargaining price, sum all the difference values in the queue and divide the sum by the evaluation frequency to obtain a final value a, and see which interval of the star rating a falls in (e.g., 5 stars below 1 thousand, 4 stars above 1 thousand to 1 thousand, 3 stars above 1 thousand to 2 thousand, 2 stars above 2 thousand to 3 thousand, 1 star above 3 thousand), it may obtain the star rating of the evaluator (1-5 star ratings, and the higher the star rating, the higher the qualification of the asset evaluator).
And a second process: and the target block chain node equipment respectively generates qualification reports of a plurality of evaluators according to the evaluation information of the plurality of asset owners and the qualification certification information of the plurality of evaluators, and generates unique identifiers of a plurality of qualification reports according to the characteristic values extracted from the qualification reports.
Specifically, the target block chain node device generates qualification reports of multiple appraisers according to evaluation information of multiple asset owners and qualification certification information of multiple appraisers, performs hash operation on feature values extracted from the qualification reports, and takes the hash values after the hash operation as unique identifiers of the qualification reports.
The characteristic values of the qualification report at least comprise:
identity number of the evaluator, index of qualification report of the evaluator.
It should be noted that the characteristic values of the qualification report include: besides the identity card number of the evaluator and the index of the qualification report of the evaluator, the method can also comprise the following steps: the name of the evaluator, the year and month of birth of the evaluator, the qualification report time, the star rating of the evaluator, the cultural degree of the evaluator, and the like.
FIG. 4 illustrates a qualification report diagram for a vehicle evaluator.
As shown in fig. 4, the qualification report of the vehicle evaluator may include: name, sex, identification number, year and month of birth, qualification report time (generation time of qualification report), qualification report number, cultural degree of vehicle evaluator, occupation, grade star rating of vehicle evaluator. Wherein the vehicle evaluator has a star rating of 4 stars.
With reference to fig. 4, the unique identifier of the qualification report may be the data index in fig. 4, such as: 4356.
the third process: the target block chain node equipment sends a plurality of target information to other block chain node equipment except the target block chain node equipment in the block chain network, so that the other block chain node equipment verifies the plurality of target information, and the target information comprises: a qualification report for an evaluator, and a unique identification for the qualification report.
Specifically, the target block chain node device sends a plurality of target information to other block chain node devices in the block chain network except the target block chain node device, so that the first block chain node device performs hash operation on the characteristic value of the qualification report in the first target information according to a hash function used when the target block chain node device generates the unique identifier of the first target information, and compares the hash value after the hash operation with the received unique identifier of the first target information sent by the target block chain node device; (ii) a The first target block chain node device is any block chain node device except the target block chain node device in the block chain network, and the first target information is any target information in the plurality of target information.
And if the hash value after the hash operation is the same as the received unique identifier of the first target information sent by the target block chain node equipment, the first target information passes the verification.
The process four is as follows: and if the target information passes the verification, the target block chain node equipment generates a target block containing the target information.
Specifically, the blocks on the block chain network are composed of block headers and block bodies. The block header includes the hash value of the current block, the hash value of the previous block, a timestamp and other information, and the block body includes the data information of the block.
Taking the qualification report of the vehicle evaluator as an example, as shown in fig. 5, the block N and the block (N +1) have the same block structure, and the qualification report of the vehicle evaluator is stored in the block body.
And a fifth process: and the target block chain node equipment writes the target block into the block chain network.
Specifically, the following describes a specific way for writing a target block containing a plurality of target information into the blockchain network.
Firstly, taking the last block on the existing block chain network as the last block of the target block, and recording the hash value of the last block in the block head of the target block; and recording the current time as the time stamp of the target block, and when a next new block is generated, taking the target block as the previous block of the new block, wherein the hash value of the target block is recorded in the block header of the new block. The last block in the blockchain network refers to a block in all blocks in the blockchain network, where the time recorded by the timestamp is closest to the current time.
In summary, the purpose of recording the hash value of the previous block and the hash value of the target block in the target block is to ensure the uncorruptable property of the qualification report of the evaluator by using the chain structure of the block chain network connected in the front and back and the irreversibility of the hash algorithm.
For example, as shown in fig. 6, considering block 1 to block 4 in the chain network, block 1 holds the hash value H0 of the previous block, the hash value H1 of block 1, and the data block a of block 1, block 2 holds the hash value H1 of the previous block, the hash value H2 of block 2, and the data block B of block 2, block 3 level block 4, and so on. For each block, the hash value of the block is calculated by performing a hash operation on the data block of the block and the data obtained by combining the hash values of the previous block.
For example, the hash values of blocks 1 to 4 in fig. 6 are calculated as follows: h1 ═ Hash (a | | H0), H2 ═ Hash (B | | H1), H3 ═ Hash (C | | H2), H4 ═ Hash (D | | | | H3), where | | | denotes concatenation and Hash denotes Hash operation. In summary, it can be seen that, through the connection relationship between the front and back blocks, if a data block on any one block needs to be tampered, the hash values of all blocks behind the block on the block chain network need to be changed. For example: if the content of data block a on block 1 in fig. 6 is to be changed, the hash values in the hash headers on block 2, block 3, block 4 and subsequent blocks need to be changed accordingly. Obviously, the difficulty is high, and the cost is also very high, theoretically, the data can be tampered by controlling 51% or more nodes (the nodes can create new blocks, commonly called mining nodes) on the block chain network.
And S303, the target block chain node equipment respectively sends asset evaluation requirement prompts to a second terminal of the first alternative evaluator.
S304, the target block chain node equipment determines at least one second alternative evaluator responding to the asset evaluation demand prompt from the first alternative evaluators, and sends a qualification report of the second alternative evaluator to the first terminal; the qualification report of the second candidate evaluator is used by the property owner to select a target evaluator from the second candidate evaluators.
Specifically, taking the asset as a vehicle as an example, fig. 7 exemplarily shows a schematic diagram of an operation interface.
As shown in fig. 7, when the second terminal of the vehicle evaluator receives the vehicle evaluation requirement prompt sent by the target block chain node device, the second terminal outputs the operation interface 70, and the operation interface 70 includes an accept icon 701 and a reject icon 702. If the second terminal of the vehicle evaluator detects the touch operation of the vehicle evaluator on the accept icon 701, the second terminal of the vehicle evaluator sends a response instruction related to the vehicle evaluation requirement prompt to the target blockchain node device to indicate that the vehicle evaluator accepts to evaluate the vehicle of the vehicle owner.
After the block chain node device sends the qualification report of the second candidate evaluator to the first terminal, the method further includes:
the method comprises the steps that target block chain node equipment receives a query request which is sent by a first terminal and contains target information of a qualification report of an evaluator;
the target block chain node equipment judges whether the query request contains a condition meeting an intelligent contract;
and if so, the target block chain node equipment sends the target information to the first terminal.
Specifically, the conditions of the intelligent contract may be: an information inquirer (such as an asset assessment demander) pays a fee or transfers points to a target blockchain node device which writes the target information into the blockchain network, and the amount or number of the fee or points is determined by the target blockchain node device and registered on the blockchain network in the form of an intelligent contract.
It should be noted that an intelligent contract is a contract in which the content of terms is recorded in a computer language instead of law, and an intelligent contract deployed on a blockchain network is a digital contract in which contract code can be executed on a CPU (processor), and when the content of terms of the intelligent contract is satisfied, predefined rules and terms can be automatically executed. In the embodiment of the application, the block-link point device sharing information can obtain the reward, the reward is defined by the block-link point device and is written into the block chain in the form of the intelligent contract, when the data provided by the block-link point device is adopted or the information user requests to view (the information user agrees with the terms and contents of the intelligent contract), the execution of the intelligent contract is triggered, and the information inquiry party (such as an asset evaluation demand party) pays corresponding cost to the target block-link point device.
For example, the target blockchain node device writes target information including the qualification report of the vehicle evaluator a into the blockchain network, and specifies in the intelligent contract that 20 points need to be paid to the target blockchain node device in order to obtain the qualification report of the vehicle evaluator a; the owner of the vehicle needs to pay 20 points to the target block point device to obtain the qualification report of the vehicle evaluator a if he wants to query the qualification report of the vehicle evaluator a.
It should be noted that, after the vehicle owner selects the vehicle evaluator according to the qualification report of the vehicle evaluator, the vehicle owner may send more detailed vehicle data (vehicle video or picture, vehicle problem, etc.) to the target blockchain node device through the second terminal of the vehicle owner, send the more detailed vehicle data to the second terminal of the target evaluator through the target blockchain node device, and write the more detailed vehicle data into the blockchain network through the target blockchain node device as a transaction certificate, and after the vehicle transaction is completed, the vehicle owner may also send a vehicle transaction contract including information such as an evaluation result of the vehicle owner by the target evaluator to the target blockchain node through the second terminal of the vehicle owner, and write the more detailed vehicle transaction contract into the blockchain network through the target blockchain node.
In summary, the target block chain node device receives the asset assessment requirement of the asset owner, which is sent by the first terminal of the asset owner; asset assessment requirements include: an asset model number. Furthermore, the target blockchain node device determines at least one first candidate evaluator with the qualification report including the vehicle model from the plurality of evaluators according to a plurality of target information containing the qualification reports of the evaluators, which are stored in the blockchain network in advance. And then, the target block chain node equipment respectively sends asset assessment requirement prompts to a second terminal of the first alternative evaluator. Finally, the target block chain node equipment determines at least one second alternative evaluator responding to the asset evaluation demand prompt from the first alternative evaluators, and sends the qualification report of the second alternative evaluator to the first terminal; the qualification report of the second candidate evaluator is used by the property owner to select a target evaluator from the second candidate evaluators. By adopting the method and the device, the reliable storage of the qualification report of the evaluator can be realized, and the real and reliable qualification report of the evaluator is provided for the information user.
Referring to fig. 8, which is a block link point device provided herein, the block link point device 80 may be the target block chain node device in fig. 3. As shown in fig. 8, the target block chain node apparatus 80 includes: a first receiving unit 801, a determining unit 802, and a first transmitting unit 803. Wherein:
a first receiving unit 801, configured to receive an asset assessment requirement of an asset owner sent by a first terminal of the asset owner; asset assessment requirements include: an asset model number;
a determining unit 802, configured to determine, from a plurality of candidate evaluators including qualification reports of evaluators stored in a blockchain network in advance, at least one qualification report including a first candidate evaluator of an asset model from the plurality of evaluators;
a first sending unit 803, configured to report the qualification of the second candidate evaluator to the first terminal; the second candidate evaluator is included in the first candidate evaluator; the qualification report of the second candidate evaluator is used by the property owner to select a target evaluator from the second candidate evaluators.
The target block link point apparatus 80 includes: the first receiving unit 801, the determining unit 802, and the first transmitting unit 803 further include:
the second receiving unit is used for respectively receiving the evaluation information of the plurality of asset owners sent by the second terminals of the plurality of asset owners and the qualification information of the plurality of evaluators sent by the second terminals of the plurality of evaluators;
the first generation unit is used for respectively generating qualification reports of a plurality of appraisers according to the evaluation information of a plurality of asset owners and the qualification certification information of the appraisers, and generating unique identifiers of a plurality of qualification reports according to the characteristic values extracted from the qualification reports;
a second sending unit, configured to send multiple pieces of target information to other block link point devices in the block chain network except the target block link point device, so that the other block link point devices verify the multiple pieces of target information, where the target information includes: the qualification report of the evaluator and the unique identifier of the qualification report;
a second generating unit configured to generate a target block including the plurality of target information if the plurality of target information is verified;
and the writing unit is used for writing the target block into the block chain network.
It should be understood that the target blockchain node apparatus 80 is only one example provided by the embodiments of the present application, and that the target blockchain node apparatus 80 may have more or fewer components than those shown, may combine two or more components, or may have a different configuration implementation of components.
It can be understood that, regarding the specific implementation manner of the functional blocks included in the target blockchain node device 80 of fig. 8, reference may be made to the method embodiment described in the foregoing fig. 3, and details are not repeated here.
Another block chain node device is provided, and block chain node device 90 may be the target block chain node device in fig. 3. As shown in fig. 9, block link point apparatus 90 may include: a processor 901, a memory 902 (one or more computer-readable storage media), and a transceiver 903. These components may communicate over one or more communication buses 904.
Processor 901 may be a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP.
The processor 901 may further include a hardware chip. The hardware chip may be an Application-specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a Field-programmable gate Array (FPGA), General Array Logic (GAL), or any combination thereof.
It can be understood that the processor 901 may be configured to determine, from a plurality of candidate evaluators, at least one first candidate evaluators whose qualification reports include asset models from among the plurality of vehicle evaluators, according to a plurality of target information including qualification reports of evaluators stored in advance in the blockchain network, determine at least one second candidate evaluators who respond to an evaluation requirement prompt from among the first candidate evaluators, and send the qualification reports of the second candidate evaluators to the first terminal; the qualification report of the second evaluator is used by the property owner to select a target evaluator from the second candidate evaluators.
A memory 902 is coupled to the processor 901 and may be used to store various software programs and/or sets of instructions. In particular implementations, memory 902 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic disk storage devices, flash memory devices, or other non-volatile solid-state storage devices. The memory 902 may store an operating system (hereinafter referred to simply as a system), such as an embedded operating system like ANDROID, IOS, WINDOWS, or LINUX. The memory 902 may also store a network communication program that may be used to communicate with one or more additional devices, one or more terminal devices, one or more network devices. The memory 902 may further store an asset owner interface program that enables the content of the application to be vividly displayed via a graphical user interface and receives control operations of the application by an asset owner via input controls such as menus, dialog boxes, and buttons.
It will be appreciated that the memory 902 may also be used to store the asset owner's valuation information sent (or uploaded) by the asset owner's second terminal, the appraiser's certification information sent by the appraiser's second terminal, and the asset appraisal requirements sent by the asset owner's first terminal.
The transceiver 903 is primarily operable to receive the qualification information of the assessor sent by the second terminal of the assessor, the valuation information of the asset owner sent by the second terminal of the asset owner, and the asset valuation requirements sent by the first terminal of the asset owner, respectively.
The transceiver 903 may be further configured to send an asset assessment requirement prompt to the second terminal of the first candidate evaluator.
It should be understood that block link point device 90 is merely one example provided by embodiments of the present application and that block link point device 90 may have more or fewer components than shown, may combine two or more components, or may have a different configuration implementation of components.
It can be understood that, regarding the specific implementation manner of the functional blocks included in the block link point device 90 of fig. 9, reference may be made to the method embodiment described in the foregoing fig. 3, and details are not repeated here.
A computer-readable storage medium stores a computer program, which is implemented when executed by a processor.
The computer readable storage medium may be an internal storage unit of the terminal according to any of the foregoing embodiments, for example, a hard disk or a memory of the terminal. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk provided on the terminal, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium is used for storing a computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output.
The present application also provides a computer program product comprising a non-transitory computer readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any of the methods as set out in the above method embodiments. The computer program product may be a software installation package, the computer comprising electronic equipment.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the terminal and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed terminal and method can be implemented in other manners. For example, the components and steps of the various examples are described. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The above-described terminal embodiments are merely illustrative, and for example, the division of the units is only one logical function division, and other division manners may be available in actual implementation, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. Further, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, terminals or units, and may also be an electrical, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented as a part of or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a block node device, or a network device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. An asset assessment method applied to a blockchain node device, the blockchain node device accessing a blockchain network, the blockchain network comprising a plurality of blockchain node devices, the asset assessment method comprising:
the method comprises the steps that target block chain node equipment receives asset evaluation requirements of an asset owner, wherein the asset evaluation requirements are sent by a first terminal of the asset owner; the asset assessment requirements include an asset model number;
and the target block chain node equipment determines at least one qualification report from a plurality of evaluators to perform asset evaluation according to a plurality of target information which is stored in the block chain network in advance and contains qualification reports of evaluators, wherein the qualification reports comprise the first candidate evaluators of the asset models.
2. The method according to claim 1, wherein the target blockchain node device determines at least one qualification report from a plurality of assessors that includes a first candidate assessor for the asset model before, based on target information pre-stored in the blockchain network for a plurality of qualification reports including assessors, further comprising:
the target block chain node equipment receives evaluation information of the multiple asset owners sent by second terminals of the multiple asset owners and qualification certification information of the multiple evaluators sent by the second terminals of the multiple evaluators respectively;
the target block chain node equipment respectively generates qualification reports of the multiple evaluators according to the evaluation information of the multiple asset owners and qualification certification information of the multiple evaluators, and generates unique identifiers of the multiple qualification reports according to characteristic values extracted from the multiple qualification reports;
the target block chain node device sends a plurality of target information to other block chain node devices in the block chain network except the target block chain node device, so that the other block chain node devices verify the plurality of target information, wherein the target information comprises: (ii) a qualification report of the evaluator and a unique identification of the qualification report;
if the target information passes the verification, the target block chain node equipment generates a target block containing the target information;
and the target block chain node equipment writes the target block into the block chain network.
3. The method of claim 2,
the characteristic values include at least:
an identity number of the evaluator, an index of qualification reports of the evaluator.
4. The method according to claim 2, wherein the target blockchain node device generates qualification reports of the multiple evaluators according to the evaluation information of the multiple asset owners and the qualification certification information of the multiple evaluators, respectively, and generates unique identifiers of the multiple qualification reports according to feature values extracted from the multiple qualification reports, specifically comprising:
and the target block chain node equipment respectively generates qualification reports of the multiple appraisers according to the evaluation information of the multiple asset owners and the qualification certification information of the multiple appraisers, respectively performs hash operation on the characteristic values extracted from the qualification reports, and respectively uses the hash values after the hash operation as unique identifiers of the qualification reports.
5. The method according to claim 2, wherein the target blockchain node device sends a plurality of target information to other blockchain node devices in the blockchain network except the target blockchain node device, so that the other blockchain node devices verify the plurality of target information, specifically including:
the target block chain node equipment sends a plurality of target information to other block chain node equipment except the target block chain node equipment in the block chain network, so that the first block chain node equipment performs Hash operation on the characteristic value of the qualification report in the first target information according to a Hash function used when the target block chain node equipment generates the unique identifier of the first target information, and compares the Hash value after the Hash operation with the received unique identifier of the first target information sent by the target block chain node equipment; the first target block chain node device is any block chain node device in the block chain network except the target block chain node device, and the first target information is any target information in the plurality of target information;
and if the hash value after the hash operation is the same as the received unique identifier of the first target information sent by the target block chain node equipment, the first target information passes verification.
6. The method of claim 1, wherein said determining at least one qualification report from a plurality of evaluators comprises a first candidate evaluator for said asset model to perform an asset assessment, further comprising:
the target block chain node equipment respectively sends asset assessment requirement prompts to second terminals of the first alternative evaluators;
and the target block chain node equipment determines at least one second alternative evaluator responding to the asset evaluation requirement prompt from the first alternative evaluators.
7. The method of claim 1, wherein after the blockchain node device sends the qualification report of the second alternative evaluator to the first terminal, further comprising:
the target block chain node equipment receives a query request which is sent by the first terminal and contains target information of a qualification report of an evaluator;
the target block chain node equipment judges whether the query request contains a condition meeting an intelligent contract;
and if so, the target block chain node equipment sends the target information to the first terminal.
8. A block link point device, wherein the block link node device is the target block link point device, comprising:
the system comprises a first receiving unit, a second receiving unit and a control unit, wherein the first receiving unit is used for receiving asset evaluation requirements of an asset owner, which are sent by a first terminal of the asset owner; the asset assessment requirements include: an asset model number;
and the determining unit is used for determining at least one qualification report including a first candidate evaluator of the asset model from a plurality of evaluators to evaluate the asset according to target information of the qualification reports of the evaluators stored in the blockchain network in advance.
9. A block link point device, wherein the block link node device is the target block link point device, comprising: a transceiver, a memory and a processor coupled with the memory, the transceiver, the memory and the processor coupled with the memory being interconnected, wherein the transceiver is configured to perform a receiving or transmitting action, the memory is configured to store implementation code of an asset assessment method, and the processor is configured to invoke the implementation code stored in the memory, i.e., perform the asset assessment method of any of claims 1-7.
10. A computer-readable storage medium, characterized in that the computer storage medium stores a computer program comprising program instructions that, when executed by a processor, cause the processor to perform the asset assessment method according to any of claims 1-7.
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Address after: Bantian street, Longgang District of Shenzhen City, Guangdong province 518000 yuan and five Avenue sign technology plant No. 1 building 4 floor Applicant after: GOLO IOV DATA TECHNOLOGY Co.,Ltd. Address before: Bantian street, Longgang District of Shenzhen City, Guangdong province 518000 yuan and five Avenue sign technology plant No. 1 building 4 floor Applicant before: GOLO IOV DATA TECHNOLOGY Co.,Ltd. |
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Application publication date: 20190118 |