CN108694669A - A kind of block chain intelligence contract implementation method and device - Google Patents
A kind of block chain intelligence contract implementation method and device Download PDFInfo
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Abstract
The present invention provides a kind of block chain intelligence contract implementation methods and device, method to include:Receive Client-initiated intelligence contract transaction request;The data separation that the transaction request is related to is data source under data source on chain and chain;Common recognition processing is carried out to data on the chain by the common recognition node of block chain;Calculation processing is carried out to data under chain by the calculation power provider under chain and verification is provided proving.The present invention supports to access heterogeneous data source, and the common recognition and computation decoupling of intelligent contract are improved execution efficiency and handling capacity, greatly strengthen the professional ability of intelligent contract by data source, blended data source under data source, chain on chain.
Description
Technical field
The present invention relates to data processing techniques, are concretely a kind of block chain intelligence contract implementation method and device.
Background technology
Intelligent contract is one of the main feature that block chain 2.0 and 3.0 is applied, however, the TPS (handling capacity) of system is universal
It is relatively low, such as 15 transactions of general processing per second of ether mill, it is applied compared to conventional centerization as VISA or Taobao are per second up to ten thousand
Or even hundreds thousand of TPS, there is prodigious gaps, cannot meet application demand.To find out its cause, traditional block chain such as we are ripe
In the ether mill platform known, in order to ensure decentralization and safety, transaction executes and block common recognition all heavy dependence common recognition nodes
Serial process, entire block chain network only have the calculated performance of single machine, the whole network to calculate power and cannot make full use of, cause performance bottleneck.
Meanwhile traditional block chain is a closed computing environment, intelligent contract can only access block chain internal data.One
Aspect causes data on chain drastically to be expanded, and block expansion eventually leads to performance of transaction and further declines.On the other hand data are based on
Sovereignty and data-privacy consider that data owning side is unwilling to store data on chain, can be caused using cryptography encrypting storing
The reduction of the expansion of data and intelligent contract processing capacity.
Enterprise block chain of the prior art based on ether mill proposes the scheme of privately owned transaction, for ensureing transaction and data
Privacy.The related side that merchandises only accesses the number in privately owned State Tree in the locally privately owned State Tree of preservation, the privately owned transaction of intelligent contract
According to.This mode ensure that the privacy of data, also reduce the scale of publicly-owned block data.But privately owned State Tree needs to merchandise
The data that related side reaches common understanding still fall within data on chain.
Currently, the mode that intelligent contract obtains data from external service is:By third party by data-pushing into block chain, and
It is not that data pull is entered by intelligent contract.This passive mode for receiving data, third party is depended on external interaction,
How to ensure that the credible of third party and data, current solution are to use prophesy machine, the prophesy machine scheme of mainstream has following
Two kinds:Reality Keys:The prophesy machine scheme that prophesy is submitted can be checked and encrypt automatically by providing one.Oraclize:It is
The prophesy machine service of one evincible honesty is notarized (TLSnotary) dependent on TLS, provide one it is evincible it is honest from
Internet page obtains safely the ability of information, can allow intelligent contract that can access internet, obtain valuable information.
But the prophesy machine scheme of the prior art still allows intelligent contract passively to receive data, while its still introduce
Tripartite eventually leads to being of limited application for intelligent contract, while the confidence level of data is also limited.
Invention content
To improve the processing capacity of block chain intelligence contract, an embodiment of the present invention provides a kind of block chain intelligence contract realities
Existing method, including:
Receive Client-initiated intelligence contract transaction request;
The data separation that the transaction request is related to is data under data on chain and chain;
Common recognition processing is carried out to data on the chain by the common recognition node of block chain;
Calculation processing is carried out to data under chain by the calculation power provider under chain and verification is provided proving.
In the embodiment of the present invention, include for data under data on chain and chain by the data separation that the transaction request is related to:
The data that current intelligent contract transaction is related to are determined according to the transaction request;
The source of data being related to according to transaction by the data separation that current intelligent contract transaction is related to be on chain data and
Data under chain.
In the embodiment of the present invention, data include on the chain:The number of distributed account book from block chain when executing contract
According to;
Data include under the chain:The number provided by the database of at least one data providing under chain when executing contract
According to.
In the embodiment of the present invention, when the data providing includes multiple data providings, each data providing utilizes
MPC algorithm carries out cooperated computing.
In the embodiment of the present invention, the conode by block chain carries out common recognition processing to data on the chain and includes:
According to transaction request from data on the acquisition chain on the distributed account book;
Being calculated data on the chain by matched calculation power provider according to contract request and providing calculating proves life
At result of calculation;Wherein, the result of calculation includes:Transaction Information, calculates proof, contract Status Change at result of calculation;
Common recognition processing is carried out according to the result of calculation change distributed account book.
Meanwhile the present invention also provides a kind of block chain intelligence contract realization devices, including:
Request receiving module, for receiving Client-initiated intelligence contract transaction request;
Discriminating module, the data separation for the transaction request to be related to are data under data on chain and chain;
It knows together on chain module, common recognition processing is carried out to data on the chain by the common recognition node of block chain;
Data processing module under chain carries out calculation processing to data under chain by the calculation power provider under chain and provides verification card
It is bright.
In the embodiment of the present invention, the discriminating module includes:
Transaction data determination unit, the data for being related to according to the current intelligent contract transaction of transaction request determination;
Discrimination unit, the data separation that current intelligent contract transaction is related to by the source for the data being related to according to transaction is chain
Data under upper data and chain.
In the embodiment of the present invention, data include on chain:The data of distributed account book from block chain when executing contract;Chain
Lower data include:The data provided by least one data providing under chain when contract are provided.
In the embodiment of the present invention, when the data providing includes multiple data providings, each data providing utilizes
MPC algorithm carries out cooperated computing.
In the embodiment of the present invention, on the chain know together module by block chain common recognition node to data source on the chain into
Row common recognition is handled:
According to transaction request from data on the acquisition chain on the distributed account book;
Being calculated data on chain by matched calculation power provider according to contract request and providing calculating proves to generate meter
Calculate result;Wherein, the result of calculation includes:Transaction Information, calculates proof, contract Status Change at result of calculation;
Common recognition processing is carried out according to the result of calculation change distributed account book.
Meanwhile the present invention also provides a kind of computer equipment, including memory, processor and storage are on a memory and can
The computer program run on a processor, the processor realize the above method when executing the computer program.
Meanwhile the present invention also provides a kind of computer readable storage medium, computer-readable recording medium storage has execution
The computer program of the above method.
The implementation method and device of intelligence contract proposed by the present invention, support to access heterogeneous data source, data source, chain on chain
Lower data source, blended data source.For data under chain, in such a way that Secure calculates (MPC) and can verify that calculating (VC)
Ensure the privacy of data and the correctness that verification calculates.
For the above and other objects, features and advantages of the present invention can be clearer and more comprehensible, preferred embodiment cited below particularly,
And coordinate institute's accompanying drawings, it is described in detail below.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
The flow chart of Fig. 1 block chain intelligence contract implementation methods disclosed by the invention;
Fig. 2 is the structure chart of block chain intelligence contract implementation method disclosed by the invention;
Fig. 3 is schematic diagram disclosed by the embodiments of the present invention;
Fig. 4 is schematic diagram disclosed by the embodiments of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The present invention provides a kind of block chain intelligence contract implementation method, as shown in Figure 1, method includes:
Step S101 receives Client-initiated intelligence contract transaction request;
Step S102, the data separation that transaction request is related to are data under data on chain and chain;
Step S103 carries out common recognition processing by the common recognition node of block chain to data on the chain;
Step S104 carries out calculation processing to data under chain by the calculation power provider under chain and provides verification to prove.
The innovation of technical solution of the present invention is common recognition and computation decoupling so that intelligent contract can support data on chain simultaneously
The access of data source under source, chain, i.e., by the clearing of data under data on the chain for needing common recognition to handle in the request of intelligent contract and chain
It is decoupled, is illustrated in figure 2 the structure chart of one embodiment of the application.
The present invention will know together and computation decoupling, and enables the system to support simultaneously on chain and data under chain, from system tray
Contract is divided into I/O logic related with state on chain and the calculating logic unrelated with state on chain on structure, and is referred to as member intelligence
Contract.
I/O logic related with state is handled on block chain by common recognition node, and state change and result are broadcasted
To block chain, local data base is written to after each node verification;
The calculating logic part unrelated with state is distributed to and calculates power provider progress parallel computation, greatly improve calculating effect
Rate.Further, Secure is carried out using encrypted circuit in the embodiment of the present invention and calculate MPC, ensure the privacy of data.This Shen
Common Boolean circuit please can be used to calculate in embodiment, for data-privacy need not be protected.Circuit logic is (either
No encryption, can) can be accelerated using specialized hardware, the utilization rate of slack resources is on the one hand improved, while improving meter
Calculate efficiency.
In the embodiment of the present invention, according to the difference of data source, intelligent contract is divided into three in the present embodiment specific implementation
Class:State contract, stateless contract and mixing contract.
State contract:State contract processing procedure is similar to traditional intelligence contract, as shown in figure 3, for the shape in the present embodiment
The schematic diagram that state contract executes, state contract needs preserve state on chain, and the data that state contract inputs when executing come from chain
Upper distribution account book, each contract execute the Status Change that can lead to contract, and distributed account book can be recorded in by having altered
In.The calculating of contract splits into multiple subtasks and is distributed to multiple calculate nodes, and contract developer can select privacy to calculate
Mode ensures data non-disclosre to calculate node.
Contract developer issues in intelligent contract to block chain, and user initiates intelligent contract transaction request, if this is intelligently closed
The data that about transaction request is related to are all from chain, then execute the state contract in the embodiment of the present application.Shape in the present embodiment
The execution of state contract is as follows:
1. algorithm provider exploitation and deployable state contract;
2. calculating initiator initiates transaction request, some state contract of meet demand is called, data source is on chain;
3. state contract receives transaction request, a special calculating channel contract can be triggered first and is called, effect is
Certain assets are done to transaction initiator to pledge;
4. contract searches matching calculation power provider according to transaction request, request is distributed to one or more sons
Task is given to suitable calculation power provider;
5. calculating power provider to calculate and provide calculating proof;
6. after calculating, a transaction can be sent from any participant toward channel contract is calculated, it is logical to close this
Road simultaneously starts a settlement process, but calculating channel will not be settled accounts at once, can first start a time interval, in the section
Interior any participant can submit calculating process objection statement;
7. task terminates and completes that remaining assets are returned to transaction initiator after settling accounts;
8. transaction, result of calculation, calculating proof, contract Status Change etc. are packaged into block by common recognition node;
9. local account book is written in block by block node.
Stateless contract:Stateless contract does not preserve any state on chain, as shown in figure 4, for the shape in the present embodiment
The schematic diagram that state contract executes.The data that stateless contract inputs when executing, can from data providing local data base under chain
Can also be multiple data providings to be individual data provider.If it is multiple data providings, then MPC is used in many ways
Algorithm carries out cooperated computing, ensures each side to the ownership of data, actual calculating split into multiple subtasks be distributed to it is multiple
Calculate node, contract developer can select the mode that privacy calculates, and ensure data non-disclosre to calculate node.The present embodiment
In, steps are as follows for the execution of stateless contract:
1. algorithm provider develops and disposes stateless contract;
2. calculating initiator initiates transaction request, some stateless contract of meet demand is called, data source is in chain
Under;
3. stateless contract receives transaction request, a special calculating channel contract can be triggered first and is called, effect
It is to do certain assets to transaction initiator to pledge;
4. contract searches matching calculation power provider according to transaction request, request is distributed to one or more sons
Task is given to suitable calculation power provider, and if it is multiple data providings, contract developer can select the side that privacy calculates
Formula, to ensure data non-disclosre to calculate node:It such as selects to carry out cooperated computing using MPC algorithm, ensures each side to data
Ownership;
5. data providing carries out cooperated computing with power provider is calculated, and provides and can verify that calculating proves;
6. after calculating, a transaction can be sent from any participant toward channel contract is calculated, it is logical to close this
Road simultaneously starts a settlement process, but calculating channel will not be settled accounts at once, can first start a time interval, in the section
Interior any participant can submit calculating process objection statement;
7. task terminates and completes that remaining assets are returned to transaction initiator after settling accounts;
8. common recognition node proves transaction, result of calculation, calculating to be packaged into block;
9. local account book is written in block by block node.
Mix contract:Allow intelligent contract to preserve state on chain, and there are data under chain to participate in calculating, this kind of contract is known as
Contract is mixed, i.e., intelligent contract executes the data being related to both including data on chain or including the data providing under chain.Mixing is closed
About it is a kind of multi-source data calculating in fact, common recognition node participates in calculating as the data providing of status data on chain.Mixing is closed
About typical usage scenario is that the data result of calculation under chain is saved on chain, and is participated in calculating next time.
The realization method of intelligence contract provided by the invention, by common recognition and computation decoupling so that the common recognition portion of intelligent contract
Divide on chain and does, and calculating section can be calculated the processing of power nodal parallels by one or more, to improve intelligent contract execution efficiency
And handling capacity.Correspondingly, intelligent contract individually either can be executed individually under chain cochain on chain under chain or simultaneously, held under chain
Row intelligence contract partial function executes complete intelligent contract, can be that distributed parallel executes;Or in several nodes
It is executed between inside, each participant safeguards state under the chain of a multi-signature jointly.All it is necessary to when may return on chain and do
Common recognition and write-in chain state etc..
The execution of processing or intelligent contract for data under chain, by can verify that the various ways such as proof or multi-signature,
Block chain is returned to, can verify that proof, the state of transaction or result accordingly, block can be written in the change etc. of contract as needed
Chain, by the way that by the decoupling of common recognition and calculating in intelligent contract implementation procedure, data are by the calculation under chain under the chain that calculating is related to
Power provider executes, and extends the application range of intelligent contract, can greatly strengthen the business of intelligent contract with data under process chain
Ability, can also be used as a kind of technology of dilatation under chain, while may return on chain, ensure that safety identical with traditional contract
Characteristic, such as non-repudiation can not be changed, the characteristics such as reliability.
To reduce developer's threshold, the present embodiment devises the high-level language of the complete C styles of figure spirit, for writing intelligent conjunction
About, and it is compiled into Boolean circuit.In the present embodiment, intelligent contract language key property is as follows:
1. data type:
1.1 basic data types, as shown in table 1:
Table 1
| Type | Digit | Numberical range |
| bool | 8 | Value is 0 and 1 |
| int8 | 8 | - 128~127 |
| uint8 | 8 | 0~255 |
| int16 | 16 | - 32768~32767 |
| uint16 | 16 | 0~65535 |
| int32 | 32 | - 2147483648~2147483647 |
| uint32 | 32 | 0~4294967295 |
| int64 | 64 | - 9223372036854775808~9223372036854775807 |
| uint64 | 64 | 0~18446744073709551615 |
1.2 user-defined dada type:
Structure:The Struct for supporting class C language, carrys out definition structure body.Structure allows definition that can store different type number
According to the variable of item.
Array:Support array data structure, it can store the sequence set of the same type element of a fixed size,
It can support Multidimensional numerical.
2. operator:
Arithmetic operator is as shown in table 2:
Table 2
2.2 relational operator:
In the present embodiment, operator and corresponding it is described as follows shown in table 3:
Table 3
2.3 bit arithmetics accord with, as shown in table 4:
Table 4
2.4 assignment operators, as shown in table 5:
Table 5
| Operator | Description |
| = | The value of the right operand is assigned to left side operand by simple assignment operator |
3. control statement:
Condition judgment sentence, as shown in table 6:
Table 6
3.2 Do statement
Do statement allows that a sentence is performed a plurality of times or sentence group, Do statement are as follows:
For (int32i=0;i<max;i++)
{
}
4. function defines:
Function is one group of sentence for executing a task together.Function is defined as follows:
functionreturn_typefoo(paramtype1name1,paramtype2name2,paramtype3[5]
name3){
return blah;
}
The present invention is mainly suitable for the Related product of block chain or service, the application with intelligent contract or system, packets
Include the scheme of public chain or alliance's chain.The present invention proposes a kind of intelligent contract method, supports to access data under chain cochain, slowing-down area
The expansion of block number evidence ensures the personal secrets of data.
Meanwhile the present invention also provides a kind of block chain intelligence contract realization devices, including:
Request receiving module, for receiving Client-initiated intelligence contract transaction request;
Discriminating module, the data separation for the transaction request to be related to are data under data on chain and chain;
It knows together on chain module, common recognition processing is carried out to data on the chain by the common recognition node of block chain;
Data processing module under chain carries out calculation processing to data under chain by the calculation power provider under chain and provides verification card
It is bright.
In the embodiment of the present invention, the discriminating module includes:
Transaction data determination unit, the data for being related to according to the current intelligent contract transaction of transaction request determination;
Discrimination unit, the data separation that current intelligent contract transaction is related to by the source for the data being related to according to transaction is chain
Data under upper data and chain.
To those skilled in the art, it can be understood according to the embodiment previously with regard to method and know the embodiment of the present invention
Therefore the realization rate of middle block chain intelligence contract realization device herein no longer further repeats the embodiment of device.
Meanwhile the present invention also provides a kind of computer equipment, including memory, processor and storage are on a memory and can
The computer program run on a processor, the processor realize the above method when executing the computer program.
Meanwhile the present invention also provides a kind of computer readable storage medium, computer-readable recording medium storage has execution
The computer program of the above method.
The implementation method and device of intelligent contract disclosed by the invention can support on chain, data or be supported simultaneously under chain
Data under chain cochain, I/O logic are responsible for data in process chain, including read data from chain, carry out common recognition processing, and will processing
Result or state later is written on chain.The outer data of calculating logic process chain, including calculating task publication are appointed with distribution, calculating
Business, which splits into multiple subtasks, calculating task is compiled into Boolean circuit and is accelerated using specialized hardware, calculates power node receives an assignment
Can verify that calculating, return to result of calculation and can verify that proof, result of calculation verification etc..
If being related to multiple data sources (including data that multiple data sides provide under data, chain on chain), in order to ensure
Data-privacy, each data providing (common recognition node is as data providing on chain) can combine progress Secure and calculate
Obtain result of calculation.
By the common recognition and computation decoupling of contract, common recognition part executes on chain (is known together by common recognition node, and is written the application
Block chain), calculating section, which is distributed to, calculates power provider progress parallel computation.Such benefit is:Extend contract applies model
It encloses, while accelerating the execution speed of contract, improve the handling capacity of block chain.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, the present invention can be used in one or more wherein include computer usable program code computer
The computer program production implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above example
Explanation be merely used to help understand the present invention method and its core concept;Meanwhile for those of ordinary skill in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (12)
1. a kind of block chain intelligence contract implementation method, which is characterized in that the method includes:
Receive Client-initiated intelligence contract transaction request;
The data separation that the transaction request is related to is data under data on chain and chain;
Common recognition processing is carried out to data on the chain by the common recognition node of block chain;
Calculation processing is carried out to data under chain by the calculation power provider under chain and verification is provided proving.
2. block chain intelligence contract implementation method as described in claim 1, which is characterized in that the transaction request to be related to
Data separation is that data include under data and chain on chain:
The data that current intelligent contract transaction is related to are determined according to the transaction request;
The data separation that current intelligent contract transaction is related to by the source for the data being related to according to transaction is under data and chain on chain
Data.
3. block chain intelligence contract implementation method as claimed in claim 2, which is characterized in that
Data include on the chain:The data of distributed account book from block chain when executing contract;
Data include under the chain:The data provided by least one data providing under chain when contract are provided.
4. block chain intelligence contract implementation method as claimed in claim 3, which is characterized in that the data providing includes
When multiple data providings, each data providing carries out cooperated computing using MPC algorithm.
5. block chain intelligence contract implementation method as claimed in claim 3, which is characterized in that the total section by block chain
Point carries out common recognition processing to data on the chain:
According to transaction request from data on the acquisition chain on the distributed account book;
Being calculated data on the chain by matched calculation power provider according to contract request and providing calculating proves to generate meter
Calculate result;Wherein, the result of calculation includes:Transaction Information, calculates proof, contract Status Change at result of calculation;
Common recognition processing is carried out according to the result of calculation change distributed account book.
6. a kind of block chain intelligence contract realization device, which is characterized in that the device includes:
Request receiving module, for receiving Client-initiated intelligence contract transaction request;
Discriminating module, the data separation for the transaction request to be related to are data under data on chain and chain;
It knows together on chain module, common recognition processing is carried out to data on the chain by the common recognition node of block chain;
Data processing module under chain carries out calculation processing to data under chain by the calculation power provider under chain and provides verification to prove.
7. block chain intelligence contract realization device as claimed in claim 6, which is characterized in that the discriminating module includes:
Transaction data determination unit, the data for being related to according to the current intelligent contract transaction of transaction request determination;
Discrimination unit, the data separation that current intelligent contract transaction is related to by the source for the data being related to according to transaction is number on chain
According to data under chain.
8. block chain intelligence contract realization device as claimed in claim 7, which is characterized in that
Data include on the chain:The data of distributed account book from block chain when executing contract;
Data include under the chain:The data provided by least one data providing under chain when contract are provided.
9. block chain intelligence contract realization device as claimed in claim 8, which is characterized in that the data providing includes
When multiple data providings, each data providing carries out cooperated computing using MPC algorithm.
10. block chain intelligence contract realization device as claimed in claim 8, which is characterized in that module of knowing together on the chain
Carrying out common recognition processing to data source on the chain by the common recognition node of block chain includes:
According to transaction request from data on the acquisition chain on the distributed account book;
Being calculated data on the chain by matched calculation power provider according to contract request and providing calculating proves to generate meter
Calculate result;Wherein, the result of calculation includes:Transaction Information, calculates proof, contract Status Change at result of calculation;
Common recognition processing is carried out according to the result of calculation change distributed account book.
11. a kind of computer equipment, including memory, processor and storage are on a memory and the meter that can run on a processor
Calculation machine program, which is characterized in that the processor realizes any side of claim 1 to 5 when executing the computer program
Method.
12. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has perform claim
It is required that the computer program of 1 to 5 any the method.
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| CN201810790407.7A CN108694669A (en) | 2018-07-18 | 2018-07-18 | A kind of block chain intelligence contract implementation method and device |
| PCT/CN2019/096149 WO2020015633A1 (en) | 2018-07-18 | 2019-07-16 | Method and apparatus for realizing smart contract of blockchain |
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