CN107918666A - Method of data synchronization and system on a kind of block chain - Google Patents
Method of data synchronization and system on a kind of block chain Download PDFInfo
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- CN107918666A CN107918666A CN201711193947.9A CN201711193947A CN107918666A CN 107918666 A CN107918666 A CN 107918666A CN 201711193947 A CN201711193947 A CN 201711193947A CN 107918666 A CN107918666 A CN 107918666A
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
This application discloses the method for data synchronization on a kind of block chain, the described method includes：Middleware obtains the corresponding data structure definition of intelligent contract；Addressing rules in the data structure definition calculate address of the data to be synchronized in block chain database；Using described address, call block chain storage area data to obtain interface and obtain the data to be synchronized；By the data write-in service database to be synchronized.By the corresponding data structure definition of intelligent contract, calculate the address of data to be synchronized and the interface acquisition data of block chain offer are be provided and are stored and arrive service database.This method avoid writing and calling a large amount of intelligent contract-defined interfaces for being only used for data synchronization, block chain performance is improved.The application also provides the data synchronous system on a kind of block chain, has above-mentioned beneficial effect.
Description
Technical field
The present invention relates to block chain field, method of data synchronization and system on more particularly to a kind of block chain.
Background technology
Data on block chain are bound with intelligent contract, and each intelligence contract is one section and operates in program on block chain, has
There is independent storage region.Intelligent contract can read and write the data in one's own storage region, but can not operate other intelligence
Data in energy contract storage region.
Application based on block chain is frequently necessary to carry out data substantial amounts of, complicated inquiry operation, this generic operation is difficult to
Realized by intelligent contract.In order to solve the problems, such as this, middleware can be introduced between service application layer and block chain.In
Between part maintain traditional relationship type (or non-relational) database, for upper strata service application carry out inquiry operation.
Meanwhile the data on block chain are constantly synchronized in database by middleware, ensure on data and the block chain in database
Unanimously.
The general thought of existing data synchronization scenario is as follows：
First, a set of interface for being used to obtain data is designed in intelligent contract.The data of simple structure can be by connecing
Mouth batch obtains.For complicated data type, it is necessary to which multiple interface kits use.
Then, synchronized process obtains data according to the interface in certain rule invocation intelligence contract.For labyrinth
Data, it is necessary to by repeatedly call.For example, it is necessary to first obtain its length when obtaining the data of Array for structural body type, then by
Bar obtains the content of array.
Finally, the data got are written in service database.
Such scheme has the disadvantages that：
Need to include mass data sync cap in intelligent contract.The effect of these interfaces is synchronous just for the sake of data,
With actual service logic and irrelevant.The presence of these interfaces causes the size of code of intelligent contract to increase, so as to increase block
The storage overhead of chain.
The excessively complicated data of structure cannot be included in intelligent contract.The increase of data structure complexity, can make corresponding
The design of Data synchronization interface becomes complicated；Intelligent contract has limited the quantity and type of the return value of interface, this leads
Cause to need that calling interface is repeated several times during data synchronization；The calling of interface, block chain can all be started once each time
Virtual machine, for performing the logic in interface.This brings certain performance cost.
The content of the invention
The purpose of the application is to provide method of data synchronization and system on a kind of block chain, solves in the prior art by number
According to by block chain database synchronization to during service database for the high dependency of interface in intelligent contract, and these interfaces
The storage overhead and performance cost problem brought.
In order to solve the above technical problems, the application provides the method for data synchronization on a kind of block chain, technical solution is as follows：
Middleware obtains the corresponding data structure definition of intelligent contract；
Addressing rules in the data structure definition calculate ground of the data to be synchronized in block chain database
Location；
Using described address, call block chain storage area data to obtain interface and obtain the data to be synchronized；
By the data write-in service database to be synchronized.
Optionally, the generating mode of the data structure definition includes：
Essential information and addressing logic rule in the intelligent contract generate the data structure definition；Wherein,
The data structure definition includes the essential information and addressing rules of data.
Optionally, it is described to utilize described address, call block chain storage area data to obtain interface and obtain the number to be synchronized
According to including：
Using described address, judge address of the data to be synchronized in block chain database whether by specifying skip to close
The field of key word is calculated；
If it is not, then calling block chain storage area data to obtain interface obtains the data to be synchronized；
If so, the corresponding number to be synchronized in address being calculated by the field of the specified skip keywords is not obtained then
According to.
Optionally, this method further includes：
The data structure definition is stored on block chain.
Optionally, the data write-in service database to be synchronized is included：
The essential information in the data structure definition resolves to the data to be synchronized of acquisition correctly
Data type；
The data to be synchronized for resolving to correct data type are write into the service database.
The application also provides the data synchronous system on a kind of block chain, the system comprises：
Definition module is obtained, the corresponding data structure definition of intelligent contract is obtained for middleware；
Address calculation module, data to be synchronized are calculated in area for the addressing rules in the data structure definition
Address in block chain database；
Data acquisition module, for using described address, calling block chain storage area data to obtain and being treated described in interface acquisition
Synchrodata；
Data simultaneous module, for the data to be synchronized to be write service database.
Optionally, which further includes：
Data structure definition generation module, it is raw for the essential information in the intelligent contract and addressing logic rule
Into the data structure definition；Wherein, the data structure definition includes the essential information and addressing rules of data.
Optionally, the data acquisition module includes：
Judging submodule, for using described address, judging address of the data to be synchronized in block chain database
Whether by specifying the field of skip keywords to be calculated；
Data acquisition submodule, is not by specifying for the address when the data to be synchronized in block chain database
When the field of skip keywords is calculated, calls block chain storage area data to obtain interface and obtain the data to be synchronized；
Data mask submodule, is by specifying skip for the address when the data to be synchronized in block chain database
When the field of keyword is calculated, do not obtain that the address being calculated by the field of the specified skip keywords is corresponding to treat
Synchrodata.
Optionally, which further includes：
Memory module, for the data structure definition to be stored in block chain.
Optionally, the data simultaneous module includes：
Data processing submodule, for the essential information in the data structure definition by the described to be synchronized of acquisition
Data resolve to correct data type；
Data write submodule, for the data to be synchronized for resolving to correct data type to be write business datum
Storehouse.
This application provides the method for data synchronization on a kind of block chain, and the corresponding number of intelligent contract is obtained by middleware
Defined according to structure, the addressing rules in the data structure definition calculate data to be synchronized in block chain database
Address；Call the data acquisition interface that block chain provides to obtain data to be synchronized, and the data to be synchronized got are converted to
Service database is stored in after correct form.
Obviously, the application avoids calling and a large amount of intelligent contracts for being only used for data synchronization is write in intelligent contract and connects
Mouthful, and the synchronization for complex types of data is more convenient, improves block chain performance.The application further includes a kind of block chain
On data synchronous system, there is above-mentioned beneficial effect.
Brief description of the drawings
In order to illustrate more clearly of the embodiment of the present application, attached drawing needed in the embodiment will be done simply below
Introduce, it should be apparent that, drawings in the following description are only some embodiments of the present application, for ordinary skill people
For member, without creative efforts, other attached drawings can also be obtained according to these attached drawings.
The method of data synchronization flow chart on a kind of block chain that Fig. 1 is provided by the embodiment of the present invention；
The method of data synchronization flow chart on another block chain that Fig. 2 is provided by the embodiment of the present invention；
Fig. 3 is the work relationship schematic diagram of the corresponding block chain of the embodiment of the present invention and middleware；
The data synchronous system schematic diagram on a kind of block chain that Fig. 4 is provided by the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical solution in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
All other embodiments obtained without making creative work, shall fall in the protection scope of this application.
Please refer to Fig.1, the method for data synchronization flow chart on a kind of block chain that Fig. 1 is provided by the embodiment of the present invention,
Technical solution is as follows：
S101：Middleware obtains the corresponding data structure definition of intelligent contract；
Each intelligent contract for needing to carry out data synchronization is respectively provided with corresponding data structure definition.The present embodiment is herein not
The generating mode and process of data structure definition are construed as limiting, it can have a variety of generation methods or generating process.Can basis
Essential information and addressing logic rule in the intelligence contract generate the data structure definition.For example, in intelligent contract,
A series of state variable can be defined.Value in state variable can be written into area after intelligent contract calls terminate each time
Block chain database.Partial status variable has complicated customization type, such as structure.It can also be wrapped in data structure definition
Structural information containing these customization types.Specifically, corresponding generating mode can be as follows：
According to the adduction relationship between intelligent contract, the source code of the intelligent contract of parsing；Institute in the intelligent contract source code of extraction
Some customization types and state variable；Information obtained in the previous step is associated and organized, output data structure definition.
Data structure definition includes addressing information, can also include essential information such as title, type, the number of each data item
According to size etc..The effect of essential information is needed in subsequent operation according to the content of essential information to the number to be synchronized that gets
According to progress type conversion.Therefore, included in essential information and type changes relevant content, naturally it is also possible to contained
The substance unrelated with type conversion.For the convenience of data synchronization process, the essential information of data item can be placed on number
In being defined according to structure, naturally it is also possible to store other positions or directly obtained again once after data to be synchronized are tentatively obtained it is right
The essential information for the data answered is to make data type conversion use.The application does not limit the existence form of essential information and deposits herein
Put position.
Addressing rules are related with the language of intelligent contract.Every kind of intelligence contract language is all abided by when being written and read to storage
Follow certain addressing logic specification.The different corresponding addressing rules of intelligent contract language are not exactly the same.For example,
In Solidity language, the data of type of foundation (such as uint, bool, address) compact arrangement in the database, its address
Offset it is incremented by successively.And for labyrinths such as mapping, its address has carried out Hash calculation according to key, hashes in number
According in storehouse.
Data structure definition can be generated when intelligent contract is compiled by compiler, can also manually to data structure definition into
Edlin, such as the operation such as mask field can be carried out, or addition additional information.Included in the data structure definition tentatively obtained
All data in intelligent contract, wherein the unconcerned non-critical data of service application may also be contained.Can be by fixed
The content of data structure definition processed, shields non-critical data, makes it will not be by synchronization.
Data structure definition can be when intelligent contract be compiled by compiler or the data knot on other instruments generation basis
Structure defines, then by manually to the data structure definition on basis into edlin, such as deleting garbage, or increase additional information
Deng.This generating mode requires to provide the compileable source code of intelligent contract.When the compileable source that can not provide intelligent contract
During code, data structure definition can also be directly by manually being write.
, can its be right in later stage manual maintenance if employing dynamic or expansible data structure in intelligent contract
The data structure definition answered.For example, when the data structure in intelligent contract changes or needs extension, corresponding data knot
Structure defines needs and regenerates.Typically edited on the basis of legacy version, then preserve the renewal for completing data structure definition.
There can certainly be other modes to realize the renewal to data structure definition, the application is not construed as limiting update mode at this.
Preferably, obtained for the ease of middleware, data structure definition can be preserved as the ancillary data of intelligent contract
On block chain；Can certainly but unlimited order be solely stored in other centralizations server it is first-class.
S102：Addressing rules in the data structure definition calculate data to be synchronized in block chain database
Address；
Middleware can calculate address of the data to be synchronized in block chain database according to addressing rules, that is, treat same
Deposit position of the step data in block chain database.
S103：Using described address, call block chain storage area data to obtain interface and obtain the data to be synchronized；
Here it is the interface that block chain itself provides that block chain storage area data, which obtains interface, can allow block chain need not
Starting virtual machine can directly invoke.
Middleware can be according to the content in data structure definition, and field is analyzed one by one.May in data to be synchronized
There are the data useless to service-user.Can be by setting the keyword in data structure definition to shield hash.For example, such as
The fruit field does not specify skip keywords, then normally performs the calling block chain storage area data and obtain described in interface acquisition
The step of data to be synchronized；If specifying skip keywords in the field, middleware can still calculate the address of the field, but
Follow-up simultaneously operating will not be carried out, i.e., it is corresponding not obtain the address being calculated by the field of the specified skip keywords
Data to be synchronized.Why need to calculate address, be because the address of follow-up field needs the address based on the field to be counted
Calculate.Certainly other modes realize that the shielding to hash or the screening to useful data, the application do not limit herein
Its implementation.
S104：By the data write-in service database to be synchronized.
Because it is binary, identical one piece of data that block chain, which provides data, gone according to different data types
Conversion, can obtain different results.Middleware needs correct result submitting to service database.So in write-in business number
According to before storehouse, it is necessary to by middleware according to the essential informations of data by the data conversion to be synchronized got into correct data.
After converting, data to be synchronized are write service database by middleware, that is, are mapped in service database in each field.
If the data of labyrinth need repeatedly to obtain, repeat the above steps S102 to S104, until all data
Synchronously complete.
Based on above-mentioned technical proposal, this application provides the method for data synchronization on a kind of block chain, avoid write and
A large amount of intelligent contract-defined interfaces for being only used for data synchronization are called, the synchronization for complex types of data is more convenient, improves area
Block chain performance.
Embodiment two
It is second embodiment of the application below, with reference to figure 2, another area that Fig. 2 is provided by the embodiment of the present invention
Method of data synchronization flow chart on block chain, technical solution are as follows：
S201：The corresponding data structure definition of the intelligent contract of generation.
Editing machine first generates the data structure definition on basis in accordance with the following methods；
According to the adduction relationship between contract, the source code of contract is parsed；By customization type all in contract source code
And state variable extracts；Information obtained in the previous step is associated and organized, the data structure based on output is determined
Justice.
At this moment the data structure definition obtained includes the essential information of data item, such as title, type, data length etc.
Deng, and the addressing rules of data.At this moment also need to manually be compiled the data structure definition on basis, complete code is such as
Shown in lower：
In the basic data structure definition of compiler generation, including name, but there is no skip.Therefore, human-edited removes
Name, adds skip, that is, rejects garbage and increase additional information.In program ' " keys ":"field_2_name"’
And the additional information by manually adding, keys can also be by compilers according to specific rule generation.
S202：Middleware obtains the data structure definition, and the addressing rules meter in the data structure definition
Calculate address of the data to be synchronized in block chain database.
S203：The middleware content in field analysis data structure definition one by one, obtains not shielded according to address
Data to be synchronized.
Middleware can be according to the content in data structure definition, and field is analyzed one by one.If the field is not specified
Skip keywords, then data to be synchronized in the normal synchronized field corresponding address；It is if specifying skip keywords, i.e., above-mentioned
" ' skip ' in code：True ", then calculate after the field corresponding address without follow-up data simultaneously operating again.
Middleware can call the interface that block chain provides, and no shielded data to be synchronized are obtained according to address.
S204：Essential information of the data to be synchronized got in data structure definition is resolved into correct data
Type.
The data to be synchronized tentatively got are binary types, it is necessary to carry out data type to be synchronized according to required type
Conversion.
S205：It is synchronous that the data to be synchronized write-in service database of right type after parsing is completed into data.
Data to be synchronized after parsing are mapped in each field of service database by middleware.
If the data of labyrinth, repeat the above steps S203 to S205, until all data synchronously complete.
With reference to figure 3, Fig. 3 is the information and number between block chain and middleware in the corresponding data synchronization process of the present embodiment
According to interactive schematic diagram.
Middleware is responsible for obtaining data structure definition, the block chain database address of data is calculated, from block chain database
Middle reading data, parsing data and preservation data to service database.
Wherein, data are read from block chain database to be realized by middleware and the information of block chain and data interaction
's.Middleware to block chain send obtain specify address date request, block chain return after receiving the request it is described specifiedly
Location data, so complete the operation that data are read from block chain database.
Based on above-mentioned technical proposal, the embodiment of the present application obtains data to be synchronized by using data structure definition, avoids
A large amount of interfaces for being only used for data synchronization are write in intelligent contract, reduce the size of code of intelligent contract；Also achieve pair
The shielding of service-user hash；It is capable of the data of easily synchronous labyrinth；Without calling a large amount of intelligent contract-defined interfaces,
Improve block chain performance.
Embodiment three
Such as Fig. 4, Fig. 4 is the data synchronous system schematic diagram on a kind of block chain provided by the embodiments of the present application, the system
Including：
Definition module 100 is obtained, the corresponding data structure definition of intelligent contract is obtained for middleware；
Address calculation module 200, data to be synchronized are calculated for the addressing rules in the data structure definition
Address in block chain database；
Data acquisition module 300, for using described address, calling block chain storage area data to obtain described in interface acquisition
Data to be synchronized；
Data simultaneous module 400, for the data to be synchronized to be write service database.
Wherein, the system also includes：
Data structure definition generation module, for according to the adduction relationship between intelligent contract, parsing the intelligent contract pair
The source code answered；Extract all customization types and the state variable in the source code；Associate and organize and is described self-defined
Type and the state variable, obtain the data structure definition.
Based on above-described embodiment, the application also provides a kind of embodiment of the data synchronous system on block chain, real herein
Apply in example, the data acquisition module further includes：
Judging submodule, for judging address of the data to be synchronized in block chain database whether by specifying skip
The field of keyword is calculated；
Data acquisition submodule, is not by specifying for the address when the data to be synchronized in block chain database
When the field of skip keywords is calculated, calls block chain storage area data to obtain interface and obtain the data to be synchronized；
Data mask submodule, is by specifying skip for the address when the data to be synchronized in block chain database
When the field of keyword is calculated, do not obtain that the address being calculated by the field of the specified skip keywords is corresponding to treat
Synchrodata.
The system also includes：
Memory module, for the data structure definition to be stored in block chain；
The data simultaneous module includes：
Data processing submodule, for the data essential information in the data structure definition by acquisition described in treat
Synchrodata resolves to correct data type；
Data write submodule, for the data to be synchronized for resolving to correct data type to be write business datum
Storehouse.
Then corresponding workflow is：
S301：Obtain the data structure definition that definition module 100 obtains data structure definition generation submodule generation；
The process of data structure definition generation submodule generation data structure definition can be according in the intelligent contract
Essential information and addressing logic rule generate the data structure definition, specifically, generating mode can be as follows：
According to the adduction relationship between contract, the source code of contract is parsed；By customization type all in contract source code
And state variable extracts；Information obtained in the previous step is associated and organized, the data structure based on output is determined
Justice.
Data structure definition includes essential information such as title, type etc. of each data item, and the addressing rule of each data item
Then.Wherein, addressing rules are related with the language of intelligent contract.Every kind of intelligence contract language is all abided by when being written and read to storage
Follow certain addressing logic specification.The different corresponding addressing rules of intelligent contract language are not exactly the same.For example,
In Solidity language, the data of type of foundation (such as uint, bool, address) compact arrangement in the database, its address
Offset it is incremented by successively.And for labyrinths such as mapping, its address has carried out Hash calculation according to key, hashes in number
According in storehouse.
Data structure definition generation submodule generally comprises a compiler, can be given birth to when intelligent contract is compiled by compiler
Into, manually basic data structure can not also be defined into edlin by compiler, such as the operation such as mask field can be carried out,
Or addition additional information.Data all in intelligent contract are contained in the data structure definition tentatively obtained, wherein may
Contain the unconcerned non-critical data of service application.Can by customizing the content of data structure definition, shielding is some treats it is same
Step data, makes it will not be by synchronization.If for example, the field does not specify skip keywords, synchronously should according to normal flow
Field.If specifying skip keywords in the field, middleware can still calculate the address of the field, but not carry out follow-up
Simultaneously operating.Why need to calculate address, be because the address of follow-up field needs the address based on the field to be counted
Calculate.There can also be the method for other customization data structure definition contents, the application is not limited thereto.
If dynamic or expansible data structure are employed in intelligent contract, it is necessary to which its is right in later stage manual maintenance
The data structure definition answered.For example, when the data structure in intelligent contract changes or needs extension, corresponding data knot
Structure defines needs and regenerates.Typically edited on the basis of legacy version, then preserve the replacement for completing data structure definition.
This process can be completed by memory module.There can certainly be other modes to realize the renewal to data structure definition, this
Application is not construed as limiting update mode at this.
After data structure definition generation terminates, memory module can preserve the data structure definition.In order to just
Obtained in middleware, data structure definition can be stored directly in block as the ancillary data of intelligent contract by memory module
On chain；Can certainly but unlimited order be solely stored in other centralizations server it is first-class.
S302：Address calculation module 200 calculates data to be synchronized according to the addressing rules of the data structure definition and exists
Address in block chain database；
S303：Data acquisition module 300 utilizes described address, calls block chain storage area data to obtain described in interface acquisition
Data to be synchronized；
Here the data to be synchronized got are binary initial data.In addition, wrapped in data acquisition acquisition module
A judging submodule is included, for judging address of the data to be synchronized in block chain database whether by specifying skip to close
The field of key word is calculated；If it is not, then calling data acquisition submodule, perform the calling block chain storage area data and obtain
The step of taking interface to obtain the data to be synchronized；If so, then calling data mask submodule, do not obtain by the specified skip
The corresponding data to be synchronized in address that the field of keyword is calculated.
S304：Data simultaneous module 400, for the data to be synchronized to be write service database.
Data simultaneous module 400 includes a data processing submodule, for the base in the data structure definition
The data to be synchronized of acquisition are resolved to correct data type by this information；
Data write submodule, for the data to be synchronized for resolving to correct data type to be write business datum
Storehouse.
Because the data to be synchronized just obtained are binary data, it is necessary to by data processing submodule according to data structure
Essential information in definition is converted into correct data type, recycles data write-in submodule to treat right type together
Step data writes service database.
If the data of labyrinth, repeat the above steps S302 to S304, is arrived until all data are fully synchronized
Service database.
The method of data synchronization on a kind of block chain provided herein and system are described in detail above.Say
Each embodiment is described by the way of progressive in bright book, and what each embodiment stressed is the difference with other embodiment
Part, between each embodiment identical similar portion mutually referring to.For system disclosed in embodiment, due to its with
Method is corresponding disclosed in embodiment, so description is fairly simple, reference may be made to the description of the method.It should refer to
Go out, for those skilled in the art, can also be to the application on the premise of the application principle is not departed from
Some improvement and modification are carried out, these are improved and modification is also fallen into the application scope of the claims.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or order.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only include that
A little key elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic key element of equipment.Under the situation not limited more, the key element that is limited by sentence "including a ..." is not arranged
Except also there are other identical element in the process, method, article or apparatus that includes the element.
Claims (10)
- A kind of 1. method of data synchronization on block chain, it is characterised in that the described method includes：Middleware obtains the corresponding data structure definition of intelligent contract；Addressing rules in the data structure definition calculate address of the data to be synchronized in block chain database；Using described address, call block chain storage area data to obtain interface and obtain the data to be synchronized；By the data write-in service database to be synchronized.
- 2. according to the method described in claim 1, it is characterized in that, the generating mode of the data structure definition includes：Essential information and addressing logic rule in the intelligent contract generate the data structure definition；Wherein, it is described Data structure definition includes the essential information and addressing rules of data.
- 3. method according to claim 1 or 2, it is characterised in that it is described to utilize described address, call block chain memory block Data acquisition interface, which obtains the data to be synchronized, to be included：Using described address, judge address of the data to be synchronized in block chain database whether by specifying skip keywords Field be calculated；If it is not, then calling block chain storage area data to obtain interface obtains the data to be synchronized；If so, the corresponding data to be synchronized in address being calculated by the field of the specified skip keywords are not obtained then.
- 4. according to the method described in claim 3, it is characterized in that, further include：The data structure definition is stored on block chain.
- 5. according to the method described in claim 4, it is characterized in that, the data write-in service database to be synchronized is included：The data to be synchronized of acquisition are resolved to correct number by the essential information in the data structure definition According to type；The data to be synchronized for resolving to correct data type are write into the service database.
- A kind of 6. data synchronous system on block chain, it is characterised in that the system comprises：Definition module is obtained, the corresponding data structure definition of intelligent contract is obtained for middleware；Address calculation module, data to be synchronized are calculated in block chain for the addressing rules in the data structure definition Address in database；Data acquisition module, for using described address, calling block chain storage area data to obtain interface acquisition described to be synchronized Data；Data simultaneous module, for the data to be synchronized to be write service database.
- 7. system according to claim 6, it is characterised in that further include：Data structure definition generation module, for the essential information in the intelligent contract and addressing logic rule generation institute State data structure definition；Wherein, the data structure definition includes the essential information and addressing rules of data.
- 8. the system according to claim 6 or 7, it is characterised in that the data acquisition module includes：Judging submodule, for using described address, whether judging address of the data to be synchronized in block chain database Field by specifying skip keywords is calculated；Data acquisition submodule, is not by specifying skip to close for the address when the data to be synchronized in block chain database When the field of key word is calculated, calls block chain storage area data to obtain interface and obtain the data to be synchronized；Data mask submodule, is by specifying skip crucial for the address when the data to be synchronized in block chain database When the field of word is calculated, it is corresponding to be synchronized that the address being calculated by the field of the specified skip keywords is not obtained Data.
- 9. system according to claim 8, it is characterised in that further include：Memory module, for the data structure definition to be stored in block chain.
- 10. system according to claim 9, it is characterised in that the data simultaneous module includes：Data processing submodule, for the essential information in the data structure definition by the data to be synchronized of acquisition Resolve to correct data type；Data write submodule, for the data to be synchronized for resolving to correct data type to be write service database.
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| CN201711193947.9A CN107918666B (en) | 2017-11-24 | 2017-11-24 | Data synchronization method and system on block chain |
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