CN112527460A - Method and system for controlling consistency of data state of bottom assets of block chain - Google Patents
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Abstract
The invention provides a method and a system for controlling the consistency of the data state of a bottom asset of a block chain, wherein a block chain transaction is constructed according to a received block chain asset data change request, and a specific contract type to be called is determined according to the constructed transaction; calling the contract type from stored information, and constructing an intelligent contract by using contract codes, wherein the stored information comprises the contract type, the asset data state and the main body state; converting the intelligent contract code into a program code which can be identified by a bottom layer module chain, judging whether the corresponding main body state and the asset data state accord with a contract execution condition or not according to the contract code, executing a contract and returning an execution result to an application layer if the corresponding main body state and the asset data state accord with the contract execution condition, updating the storage information of the asset data state and the main body state, keeping consistency, and otherwise, ending the contract calling; the method and the device can ensure the accuracy and consistency of the bottom data state of the block chain.
Description
Technical Field
The invention belongs to the technical field of block chain data processing, and particularly relates to a method and a system for controlling the consistency of data states of underlying assets of a block chain.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The intelligent contract is a coded contract which is written in a computer language and automatically verified and executed by a computer, is a digital form of a paper contract, can save the contract execution cost and improve the contract execution efficiency. The intelligent contract based on the block chain technology not only can exert the advantages of the intelligent contract in the aspect of cost efficiency, but also can avoid the interference of malicious behaviors to the normal execution of the contract, and the characteristics of the block chain technology ensure that the whole processes of storage, reading and execution are transparent, traceable and not falsifiable by writing the intelligent contract into the block chain in a digital form. Meanwhile, a set of state machine system is constructed by the block chain self-contained consensus algorithm, so that the intelligent contract can run efficiently.
But also creates a number of problems during the use of smart contracts. The most important problem is that the intelligent contract is a section of computer code, so that a human logic vulnerability occurring in the coding process of a code writer cannot be eliminated, and the problem causes a hacker attack, namely the DAO attack, with the largest block chain intelligent contract boundary, wherein the attack means that a hacker does not check the consistency of the data state of the underlying asset when recognizing the intelligent contract code of the DAO to call, so that a great deal of funds are lost in the DAO project; secondly, the intelligent contracts are a series of program language codes which are completely suitable for the bottom layer, when a plurality of applications call the intelligent contracts of the block chain, the intelligent contracts can not be called due to the fact that the program language is not strong in interpretation, and the intelligent contracts can not provide cross-application calling among different applications.
According to the knowledge of the inventor, more of the related patents at present are optimized in the aspects of improving the execution efficiency of the intelligent contract, enhancing the trust, simplifying the flow and the like, and the consistency and the accuracy of the asset data state are not improved.
Disclosure of Invention
The invention provides a method and a system for controlling the consistency of the data state of the bottom assets of a block chain, aiming at solving the problems.
In the present invention, the asset data refers to data resources recorded in a physical or electronic manner, including but not limited to photos, documents, drawings, videos, digital rights, and the like, which take files as carriers.
According to some embodiments, the invention adopts the following technical scheme:
a method for controlling the consistency of the data state of the bottom assets of a block chain comprises the following steps:
building a blockchain transaction according to the received blockchain asset data change request, and determining a specific contract type to be called according to the built transaction;
calling the contract type from stored information, and constructing an intelligent contract by using contract codes, wherein the stored information comprises the contract type, the asset data state and the main body state;
converting the intelligent contract code into a program code which can be identified by the bottom layer module chain, judging whether the corresponding main body state and the asset data state accord with the contract execution condition or not according to the contract code, executing the contract and returning the execution result to the application layer if the contract execution condition is met, updating the storage information of the asset data state and the main body state, keeping consistency, and otherwise, ending the contract calling.
A system for controlling consistency of state of blockchain underlying asset data, comprising:
the application layer is used for sending a related asset data state change request of the block chain bottom layer to the upper layer;
the interaction layer is used for realizing the interaction between the application layer and the bottom layer block chain, carrying out standardized reconstruction on the asset data state change request of the application layer, constructing the received different asset data state change requests into standard data which can be identified by the bottom layer block chain, and requesting to call the related intelligent contract;
the contract virtual machine is used for receiving an intelligent contract calling request sent by the interaction layer, constructing an intelligent contract and executing the intelligent contract;
and the database is used for storing the intelligent contract, the asset data and the main body related information on the block chain.
As an alternative embodiment, the interaction layer includes an interaction construction module and a contract invocation module, wherein:
the interactive construction module is used for carrying out standard reconstruction on the asset data state change requests of the application layer and constructing the asset data state change requests sent by various different applications into standard data which can be identified by the bottom layer module chain;
and the contract calling module is used for calling the contract related to the interaction according to the standard data constructed by the interaction construction module.
As an alternative embodiment, the contract virtual machine includes a contract construction module, a contract interpreter, and a contract executor, wherein:
the contract construction module is used for extracting corresponding contract types from the database according to the called contracts and constructing specific intelligent contracts;
the contract interpreter is used for converting the constructed intelligent contract into specific codes of a corresponding programming language;
and the contract executor is used for inquiring the asset data and the current state of the main body, and executing the constructed contract when the intelligent contract realization conditions are in accordance.
As an alternative embodiment, the database includes a contract status library, an asset status library, and a subject status library, wherein:
the contract state library is used for storing all intelligent contracts of the current block chain;
the asset state library is used for storing all assets and states of the current block chain;
and the main body state library is used for storing all main bodies and states of the current block chain.
The working method based on the system comprises the following steps:
an application layer receives a block chain asset data change request sent by a user;
the interaction layer constructs a blockchain transaction according to the received request, and determines a specific contract type to be called according to the constructed transaction;
the contract construction module inquires the contract type from the contract state library according to the contract type needing to be called and constructs an intelligent contract according to the contract code of the contract state library;
the contract interpreter converts the intelligent contract codes into program codes which can be identified by the bottom layer block chain;
the contract executor inquires whether the main body state and the asset state in the world state library accord with a contract execution condition or not according to the contract code, if the contract execution condition is met, the contract executor executes the contract and returns an execution result to the application layer, and the asset and the main body state after the contract execution are sent to the asset state library and the main body state library, otherwise, the contract calling is finished;
and the main body state library and the asset state library update the state information of the corresponding main body and the corresponding asset according to the received asset and the main body state, always keep the state consistency of the underlying asset and the main body, and finish the calling of the contract.
A computer readable storage medium having stored therein instructions adapted to be loaded by a processor of a terminal device and to perform the steps of the method of controlling consistency of data states of blockchain underlying assets.
A terminal device comprising a processor and a computer readable storage medium, the processor being configured to implement instructions; the computer readable storage medium is used for storing a plurality of instructions adapted to be loaded by a processor and to execute the steps of the method for controlling the state consistency of blockchain underlying asset data.
Compared with the prior art, the invention has the beneficial effects that:
the invention can always ensure the consistency of the states of the assets at the bottom layer of the block chain, and the states of the same asset can keep global consistency at the same time.
The invention avoids the related attack accidents of block chain intelligent contracts such as TheDAO and the like, verifies the consistency of the data state of the underlying assets in real time and ensures the effectiveness of executing the block chain intelligent contracts;
the invention constructs the intelligent contract program code suitable for the bottom layer through the contract interpreter so as to better support the cross-application calling of the upper layer.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a system architecture diagram of controlling consistency of underlying resource states of a blockchain;
FIG. 2 is a schematic process flow diagram.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The first embodiment is as follows:
as shown in fig. 1, a system for controlling the state consistency of the underlying assets of the block chain is provided, and a world state library is arranged at the underlying layer of the block chain by improving the existing intelligent contract model to record the real-time states of the underlying block chain asset data, the contract and the main body, so that the state consistency of the underlying asset data in the contract calling process is realized.
The system specifically comprises:
the application layer comprises block chain upper-layer applications in different fields and different industries and is responsible for sending transaction requests related to block chain bottom-layer assets for the upper-layer applications;
the interaction layer is responsible for realizing interaction between the application layer and the bottom layer module chain and comprises a transaction construction module and a contract calling module;
the transaction construction module is responsible for carrying out standard reconstruction on transaction requests of the application layer and constructing the transaction requests sent by various different applications into standard transactions which can be identified by the bottom layer block chain;
the contract calling module is used for calling the contract related to the transaction according to the transaction constructed by the transaction construction module;
the contract virtual machine is used for receiving a contract calling request sent by the interaction layer, constructing a contract and executing the contract;
the method specifically comprises the following steps: the contract construction module is used for extracting corresponding contract types from the world state library according to the called contracts and constructing specific intelligent contracts;
the contract interpreter is responsible for converting the constructed intelligent contract into specific codes of a corresponding programming language;
the contract executor is responsible for inquiring the current states of the assets and the main body, and when the contract realization conditions are in accordance, the constructed contract is executed.
The system also comprises a world state library which is responsible for storing relevant information such as intelligent contracts, main bodies, assets and the like on the block chain, wherein:
the contract state library is used for storing all intelligent contract classes of the current block chain;
the asset state library is used for storing all assets and states of the current block chain;
the main body state library is responsible for storing all main bodies and states of the current block chain.
Example two:
a method for controlling the consistency of the state of the underlying assets of a blockchain, as shown in fig. 2, the method comprising the steps of:
s11: the application layer receives a block chain transaction request sent by a user;
s12: the interaction layer constructs a block chain transaction according to the received transaction request;
s13: a contract calling module of the interaction layer determines a specific contract type to be called according to the constructed transaction;
s14: the contract construction module inquires the contract type from the contract state library according to the contract type needing to be called and constructs an intelligent contract according to the contract code of the contract state library;
s15: the contract interpreter converts the intelligent contract codes into program codes which can be identified by the bottom layer block chain;
s16: the contract executor inquires whether the main body state and the asset state in the world state library accord with contract execution conditions or not according to the contract codes, if so, the step S17 is carried out, otherwise, the contract calling is finished;
s17: the contract executor executes the contract and returns an execution result to the application layer, and sends the asset and the main body state after the contract is executed to the asset state library and the main body state library;
s18: and the main body state library and the asset state library update the state information of the corresponding main body and the corresponding asset according to the received asset and the main body state, always keep the state consistency of the underlying asset and the main body, and finish the calling of the contract.
In the above process, the intelligent contract code may be in multiple languages and multiple forms, and a uniform code calling format is required, so that the multi-language and multi-form intelligent contract code is uniformly converted into the language used by the bottom layer block chain through the contract interpreter. For example, the bottom layer uses go language, but the sent intelligent contract is written by c language, and the contract interpreter converts c language into go language.
The contract code includes a judgment statement for judging the status of the subject and the asset. For example, if the principal status is account disabled or the asset status is unavailable, as determined by if else, then the contract execution conditions are not met.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
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.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. A method for controlling the consistency of the data state of the bottom assets of a block chain is characterized in that: the method comprises the following steps:
building a blockchain transaction according to the received blockchain asset data change request, and determining a specific contract type to be called according to the built transaction;
calling the contract type from stored information, and constructing an intelligent contract by using contract codes, wherein the stored information comprises the contract type, the asset data state and the main body state;
converting the intelligent contract code into a program code which can be identified by the bottom layer module chain, judging whether the corresponding main body state and the asset data state accord with the contract execution condition or not according to the contract code, executing the contract and returning the execution result to the application layer if the contract execution condition is met, updating the storage information of the asset data state and the main body state, keeping consistency, and otherwise, ending the contract calling.
2. A system for controlling the consistency of the data state of the bottom assets of a block chain is characterized in that: the method comprises the following steps:
the application layer is used for sending a related asset data state change request of the block chain bottom layer to the upper layer;
the interaction layer is used for realizing the interaction between the application layer and the bottom layer block chain, carrying out standardized reconstruction on the asset data state change request of the application layer, constructing the received different asset data state change requests into standard data which can be identified by the bottom layer block chain, and requesting to call the related intelligent contract;
the contract virtual machine is used for receiving an intelligent contract calling request sent by the interaction layer, constructing an intelligent contract and executing the intelligent contract;
and the database is used for storing the intelligent contract, the asset data and the main body related information on the block chain.
3. The system for controlling the consistency of data states of underlying assets of a blockchain of claim 2, wherein: the interaction layer comprises an interaction construction module and a contract calling module, wherein:
the interactive construction module is used for carrying out standard reconstruction on the asset data state change requests of the application layer and constructing the asset data state change requests sent by various different applications into standard data which can be identified by the bottom layer module chain;
and the contract calling module is used for calling the contract related to the interaction according to the standard data constructed by the interaction construction module.
4. The system for controlling the consistency of data states of underlying assets of a blockchain of claim 2, wherein: the contract virtual machine comprises a contract construction module, a contract interpreter and a contract executor, wherein:
the contract construction module is used for extracting corresponding contract types from the database according to the called contracts and constructing specific intelligent contracts;
the contract interpreter is used for converting the constructed intelligent contract into specific codes of a corresponding programming language;
and the contract executor is used for inquiring the asset data and the current state of the main body, and executing the constructed contract when the intelligent contract realization conditions are in accordance.
5. The system for controlling the consistency of data states of underlying assets of a blockchain of claim 2, wherein: the database includes a contract status library, an asset status library and a subject status library, wherein:
the contract state library is used for storing all intelligent contracts of the current block chain;
the asset state library is used for storing all assets and states of the current block chain;
and the main body state library is used for storing all main bodies and states of the current block chain.
6. Method of operation based on a system according to any of claims 2-5, characterized in that: the method comprises the following steps:
an application layer receives a block chain asset data change request sent by a user;
the interaction layer constructs a blockchain transaction according to the received request, and determines a specific contract type to be called according to the constructed transaction;
the contract construction module inquires the contract type from the contract state library according to the contract type needing to be called and constructs an intelligent contract according to the contract code of the contract state library;
the contract interpreter converts the intelligent contract codes into program codes which can be identified by the bottom layer block chain;
the contract executor inquires whether the main body state and the asset state in the world state library accord with a contract execution condition or not according to the contract code, if the contract execution condition is met, the contract executor executes the contract and returns an execution result to the application layer, and the asset and the main body state after the contract execution are sent to the asset state library and the main body state library, otherwise, the contract calling is finished;
and the main body state library and the asset state library update the state information of the corresponding main body and the corresponding asset according to the received asset and the main body state, always keep the state consistency of the underlying asset and the main body, and finish the calling of the contract.
7. The method of claim 6, further comprising: the contract interpreter unifies the conversion of multi-lingual multi-form intelligent contract code into the language used by the underlying blockchain.
8. The method of claim 6, further comprising: the intelligent contract comprises a judgment statement for judging the states of the main body and the asset, the states of the main body and the asset are judged according to the judgment statement, and whether the contract execution condition is met or not is determined according to the states.
9. A computer-readable storage medium characterized by: in which a plurality of instructions are stored, said instructions being adapted to be loaded by a processor of a terminal device and to carry out the steps of a method of controlling consistency of state of blockchain underlying asset data according to claim 1.
10. A terminal device is characterized in that: the system comprises a processor and a computer readable storage medium, wherein the processor is used for realizing instructions; a computer readable storage medium for storing a plurality of instructions adapted to be loaded by a processor and to perform the steps of the method of controlling consistency of state of blockchain underlying asset data of claim 1.
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