CN111105277A - Block chain state change transaction tracing method and device - Google Patents
Block chain state change transaction tracing method and device Download PDFInfo
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- CN111105277A CN111105277A CN201911356606.8A CN201911356606A CN111105277A CN 111105277 A CN111105277 A CN 111105277A CN 201911356606 A CN201911356606 A CN 201911356606A CN 111105277 A CN111105277 A CN 111105277A
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Abstract
The invention discloses a block chain state change transaction tracing method and a block chain state change transaction tracing device. By adding the transaction hash value when the block chain state changes in the block chain state, historical transaction data can be quickly searched, so that the problem that the existing block chain data only can be inquired to the latest state through an intelligent contract and the historical transaction records in the block cannot be directly traced is solved, and the tracing efficiency of the historical transaction data is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of block chains, in particular to a method and a device for tracing block chain state change transactions.
Background
In the block chain electronic bill service system, due to the particularity of the electronic bill, the block chain electronic bill is taken as a supervision department from state tax authorities such as invoicing, printing, receipt, reimbursement, red rush and the like, and the whole flow of the invoice needs to be traced, so that the corresponding behaviors of the invoicing enterprise in each stage of the invoice are further mined and analyzed by tracing the whole flow information of the invoice for supervising the requirements of a malicious invoicing enterprise. However, in the current scheme for querying data on a block chain, only the latest block chain state can be obtained, and there is no way to obtain the block chain state change condition in the block chain, so that the historical transaction records in the block cannot be directly traced.
Disclosure of Invention
The embodiment of the invention provides a method and a device for tracing block chain state change transactions, which are used for solving the problems that the existing block chain data only can be inquired to the latest state through an intelligent contract and the historical transaction records in a block cannot be directly traced.
In a first aspect, an embodiment of the present invention provides a method for tracing a blockchain state change transaction, including:
obtaining a transaction identifier of a transaction to be traced by the block link points;
the block chain node determines a block chain state corresponding to the transaction identifier according to the transaction identifier; the block chain state comprises a historical transaction hash set, and the historical transaction hash set comprises a hash value of a transaction when the block chain state changes;
and the block chain node determines historical transaction data of each transaction corresponding to the transaction identifier according to the historical transaction hash set.
According to the technical scheme, the transaction hash value when the block chain state changes is added in the block chain state, so that historical transaction data can be quickly searched, the problem that the existing block chain data only can be inquired to the latest state through an intelligent contract and cannot directly trace the historical transaction records in the block can be solved, and the tracing efficiency of the historical transaction data is improved.
Optionally, the determining, by the blockchain node, historical transaction data of each transaction corresponding to the transaction identifier according to the historical transaction hash set includes:
the block chain node determines a block corresponding to each hash value according to each hash value in the historical transaction hash set;
and the block chain node determines historical transaction data of each transaction corresponding to the transaction identifier from the block corresponding to each hash value.
Optionally, before the block link point obtains the transaction identifier of the transaction to be traced back, the method further includes:
the block chain link point acquires a transaction identifier of a transaction to be executed;
the block chain node executes the transaction to be executed and writes transaction data into a block;
and when the block chain node confirms that the transaction data changes, updating the block chain state, and storing the hash value of the block in a historical transaction hash set in the block chain state.
Optionally, the block chain state is a state of the latest transaction execution corresponding to the transaction identifier.
Optionally, the transaction identifier of the transaction to be traced is obtained through a deployed intelligent contract.
In a second aspect, an embodiment of the present invention provides an apparatus for tracing a blockchain state change transaction, including:
the acquisition unit is used for acquiring a transaction identifier of a transaction to be traced;
the processing unit is used for determining the state of the block chain corresponding to the transaction identifier according to the transaction identifier; the block chain state comprises a historical transaction hash set, and the historical transaction hash set comprises a hash value of a transaction when the block chain state changes; and determining the historical transaction data of each transaction corresponding to the transaction identification according to the historical transaction hash set.
Optionally, the processing unit is specifically configured to:
determining a block corresponding to each hash value according to each hash value in the historical transaction hash set;
and determining historical transaction data of each transaction corresponding to the transaction identification from the block corresponding to each hash value.
Optionally, the processing unit is further configured to:
before acquiring the transaction identification of the transaction to be traced, the method further comprises the following steps:
acquiring a transaction identifier of a transaction to be executed;
executing the transaction to be executed, and writing transaction data into a block;
and updating the block chain state when the transaction data are confirmed to be changed, and storing the hash value of the block in a historical transaction hash set in the block chain state.
Optionally, the block chain state is a state of the latest transaction execution corresponding to the transaction identifier.
Optionally, the transaction identifier of the transaction to be traced is obtained through a deployed intelligent contract.
In a third aspect, an embodiment of the present invention further provides a computing device, including:
a memory for storing program instructions;
and the processor is used for calling the program instruction stored in the memory and executing the block chain state change transaction tracing method according to the obtained program.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable non-volatile storage medium, which includes computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute the above method for tracing blockchain state change transactions.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, 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 a system architecture according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method for tracing block chain state change transactions according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a block chain state according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a system architecture according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for block chain state change transaction tracing according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. 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 invention.
Fig. 1 illustrates a system architecture to which an embodiment of the present invention is applicable, which may include a plurality of mechanism clients 100 and a blockchain system 200.
The enterprise client 100 is configured to communicate with the blockchain system 200, and send transaction data to the blockchain system 200 for processing and uplink.
Blockchain system 200 is in communication with facility clients 100 by a plurality of blockchain nodes 210 for processing and storing transaction data sent by facility clients 100. The plurality of blockchain nodes 210 may be in communication with each other, and each blockchain node 210 includes a plurality of blocks therein for storing transaction data sent by the institution client 100.
It should be noted that the structure shown in fig. 1 is only an example, and the embodiment of the present invention is not limited thereto.
Based on the above description, fig. 2 shows in detail the flow of a method for blockchain state change transaction trace back according to an embodiment of the present invention, where the flow may be performed by a device for blockchain state change transaction trace back, and the device may be located in the blockchain node 210 or may be the blockchain node 210.
As shown in fig. 2, the process specifically includes:
in step 201, the block link point obtains a transaction identifier of a transaction to be traced.
In the embodiment of the invention, the transaction identification of the transaction to be traced can be acquired through the deployed intelligent contract. Before obtaining the transaction identifier of the transaction to be traced back, the block chain node needs to write the hash value into the block chain state when executing each transaction. The block chain state is the state of the latest transaction execution corresponding to the transaction identifier.
Specifically, the block link point acquires a transaction identifier of the transaction to be executed, then executes the transaction to be executed, and writes transaction data into the block. And finally, updating the block chain state when the change of the transaction data is confirmed, and storing the hash value of the block in a historical transaction hash set in the block chain state.
In the embodiment of the present invention, the data structure of the block chain state may be as shown in fig. 3, and when the data structure stored in the block chain state is constructed, a transaction hash set field is added for storing a transaction history hash set. That is, in addition to storing the required document data, the transaction hash value set of all transactions that change the block chain state needs to be stored, and the state needs to have the following fields:
and (3) transaction hash set: and each transaction hash which enables the block chain state to change is set, the transaction hash can uniquely represent a transaction, and specific transaction data can be inquired through the transaction hash.
A method for acquiring a transaction hash is also required to be added in the intelligent contract, and when a transaction invoking contract is sent each time, a hash value of the transaction is acquired and stored in a state.
And 202, the block chain node determines a block chain state corresponding to the transaction identifier according to the transaction identifier.
After the transaction identifier is obtained, the block chain link point can obtain the block chain state corresponding to the transaction identifier.
And 203, determining the historical transaction data corresponding to the transaction identifier by the blockchain node according to the historical transaction hash set.
Specifically, the block link point determines a block corresponding to each hash value according to each hash value in the historical transaction hash set, and then determines each historical transaction data corresponding to the transaction identifier from the block corresponding to each hash value.
And sequentially returning the transaction data corresponding to the transaction hash stored in the block. Therefore, historical transaction data for prompting state change can be obtained, and the tracing process of the whole block chain state change process is completed.
The user or the organization can analyze the whole transaction flow through the corresponding transaction data, so that the authenticity and credibility of the data are verified.
In order to better explain the embodiment of the present invention, the following describes the above-mentioned process of tracing back the blockchain state change transaction in a specific implementation scenario.
As shown in fig. 4, in this embodiment, a blockchain electronic ticket service system with Fabric as a bottom layer is used as an example, an intelligent contract with a function of obtaining a transaction hash is deployed on the blockchain electronic ticket service system, and when an invoice is subjected to chaining operations such as invoicing, printing, receipt, reimbursement, red flushing and the like, a hash value of a transaction in which the invoice changes an invoice state is obtained in a contract execution process, and is stored in the state together with invoice data.
The invoice status is stored by adopting a data structure with a transaction hash set field shown in FIG. 3, and the SDK adopts a tool independently developed based on an open source Fabric SDK, so that the invoice status is more convenient and quicker to use compared with an original SDK. Each merchant is connected with the billing facilitator through the self-cash register system, each billing facilitator is connected with the block chain invoice node of the tax bureau through sdk given by the block chain invoice system of the tax bureau, and compared with the example in the figure 2, the supervision department of the tax bureau is the same except for the part without the merchant, so the description is not repeated.
Based on the above framework, the steps of the digital integral expiration operation and the modification of the validity period are as follows:
1. each billing merchant applies for billing to the tax bureau by connecting with a billing facilitator authorized by the tax bureau, the user puts forward a demand to the merchant, and the merchant sends the request to the facilitator.
2. The service provider calls an intelligent contract with a transaction hash acquiring function through sdk, after invoicing transaction is executed, corresponding transaction is stored in a block, invoice data with the state of invoicing and an invoicing transaction hash value are stored in the state, the processing modes of transaction requests such as subsequent printing, receipt, reimbursement, red punching and the like are similar to invoicing, and all transaction hashes with changed states are stored in the state.
3. The billing service provider can trace the whole transaction flow of the invoice in order to manage the whole flow of merchant billing, and at the moment, firstly, the latest state of the corresponding invoice and the historical transaction hash set of the invoice are inquired in the state and returned to the billing service provider.
4. The billing facilitator will sequentially import the transaction hash values from the historical transaction hash set via sdk and obtain the corresponding transactions from the block.
5. The obtained transaction set is returned to the invoicing service provider, and the service provider can analyze the invoicing behaviors of the corresponding merchants through the tracing of the whole transaction process.
The above embodiment shows that the block link points acquire the transaction identifier of the transaction to be traced, and determine the block link state corresponding to the transaction identifier according to the transaction identifier, where the block link state includes a historical transaction hash set, the historical transaction hash set includes the hash value of the transaction when the block link state changes, and determine the historical transaction data of each transaction corresponding to the transaction identifier according to the historical transaction hash set. By adding the transaction hash value when the block chain state changes in the block chain state, historical transaction data can be quickly searched, so that the problem that the existing block chain data only can be inquired to the latest state through an intelligent contract and the historical transaction records in the block cannot be directly traced is solved, and the tracing efficiency of the historical transaction data is improved.
Based on the same technical concept, fig. 5 exemplarily shows a structure of an apparatus for block chain state change transaction tracing, which can execute a flow of block chain state change transaction tracing, according to an embodiment of the present invention.
As shown in fig. 5, the apparatus specifically includes:
an obtaining unit 501, configured to obtain a transaction identifier of a transaction to be traced;
the processing unit 502 is configured to determine, according to the transaction identifier, a block chain state corresponding to the transaction identifier; the block chain state comprises a historical transaction hash set, and the historical transaction hash set comprises a hash value of a transaction when the block chain state changes; and determining the historical transaction data of each transaction corresponding to the transaction identification according to the historical transaction hash set.
Optionally, the processing unit 502 is specifically configured to:
determining a block corresponding to each hash value according to each hash value in the historical transaction hash set;
and determining historical transaction data of each transaction corresponding to the transaction identification from the block corresponding to each hash value.
Optionally, the processing unit 502 is further configured to:
before acquiring the transaction identification of the transaction to be traced, the method further comprises the following steps:
acquiring a transaction identifier of a transaction to be executed;
executing the transaction to be executed, and writing transaction data into a block;
and updating the block chain state when the transaction data are confirmed to be changed, and storing the hash value of the block in a historical transaction hash set in the block chain state.
Optionally, the block chain state is a state of the latest transaction execution corresponding to the transaction identifier.
Optionally, the transaction identifier of the transaction to be traced is obtained through a deployed intelligent contract.
Based on the same technical concept, an embodiment of the present invention further provides a computing device, including:
a memory for storing program instructions;
and the processor is used for calling the program instruction stored in the memory and executing the block chain state change transaction tracing method according to the obtained program.
Based on the same technical concept, an embodiment of the present invention further provides a computer-readable non-volatile storage medium, which includes computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute the above method for tracing the blockchain state change transaction.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for block chain state change transaction tracing, comprising:
obtaining a transaction identifier of a transaction to be traced by the block link points;
the block chain node determines a block chain state corresponding to the transaction identifier according to the transaction identifier; the block chain state comprises a historical transaction hash set, and the historical transaction hash set comprises a hash value of a transaction when the block chain state changes;
and the block chain node determines historical transaction data of each transaction corresponding to the transaction identifier according to the historical transaction hash set.
2. The method of claim 1, wherein the determining, by the blockchain node, the historical transaction data of each transaction corresponding to the transaction identifier according to the historical transaction hash set comprises:
the block chain node determines a block corresponding to each hash value according to each hash value in the historical transaction hash set;
and the block chain node determines historical transaction data of each transaction corresponding to the transaction identifier from the block corresponding to each hash value.
3. The method of claim 1, wherein prior to obtaining the transaction identification of the transaction to be traced back at the block link point, further comprising:
the block chain link point acquires a transaction identifier of a transaction to be executed;
the block chain node executes the transaction to be executed and writes transaction data into a block;
and when the block chain node confirms that the transaction data changes, updating the block chain state, and storing the hash value of the block in a historical transaction hash set in the block chain state.
4. The method of claim 1, wherein the blockchain state is a state at a latest transaction execution time corresponding to the transaction identification.
5. A method according to any one of claims 1 to 4, wherein the transaction identity of the transaction to be traced is obtained by means of a deployed smart contract.
6. An apparatus for block chain state change transaction tracing, comprising:
the acquisition unit is used for acquiring a transaction identifier of a transaction to be traced;
the processing unit is used for determining the state of the block chain corresponding to the transaction identifier according to the transaction identifier; the block chain state comprises a historical transaction hash set, and the historical transaction hash set comprises a hash value of a transaction when the block chain state changes; and determining the historical transaction data of each transaction corresponding to the transaction identification according to the historical transaction hash set.
7. The apparatus as claimed in claim 6, wherein said processing unit is specifically configured to:
determining a block corresponding to each hash value according to each hash value in the historical transaction hash set;
and determining historical transaction data of each transaction corresponding to the transaction identification from the block corresponding to each hash value.
8. The apparatus as recited in claim 6, said processing unit to further:
before acquiring the transaction identification of the transaction to be traced, the method further comprises the following steps:
acquiring a transaction identifier of a transaction to be executed;
executing the transaction to be executed, and writing transaction data into a block;
and updating the block chain state when the transaction data are confirmed to be changed, and storing the hash value of the block in a historical transaction hash set in the block chain state.
9. The apparatus of claim 6, wherein the blockchain state is a state at a latest transaction execution time corresponding to the transaction identification.
10. Apparatus according to any one of claims 6 to 9, wherein the transaction identity of the transaction to be traced is obtained by means of a deployed smart contract.
11. A computing device, comprising:
a memory for storing program instructions;
a processor for calling program instructions stored in said memory to execute the method of any one of claims 1 to 5 in accordance with the obtained program.
12. A computer-readable non-transitory storage medium including computer-readable instructions which, when read and executed by a computer, cause the computer to perform the method of any one of claims 1 to 5.
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| CN201911356606.8A CN111105277A (en) | 2019-12-25 | 2019-12-25 | Block chain state change transaction tracing method and device |
| PCT/CN2020/117173 WO2021129005A1 (en) | 2019-12-25 | 2020-09-23 | Blockchain state change-based transaction tracking method and device |
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| WO2021129005A1 (en) * | 2019-12-25 | 2021-07-01 | 中国银联股份有限公司 | Blockchain state change-based transaction tracking method and device |
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| WO2021129005A1 (en) | 2021-07-01 |
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