CN111258714A - Intelligent contract execution method for block chain - Google Patents
Intelligent contract execution method for block chain Download PDFInfo
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Abstract
The invention discloses a block chain intelligent contract execution method, wherein a contract data service module and a contract loading module are arranged in a block chain link point, the block chain link point receives a dynamic shared library of an intelligent contract and intelligent contract deployment transaction from a user, the intelligent contract dynamic shared library is forwarded to the contract loading module for loading after validity check, a contract container is created and started, then a contract service program is started, and the block chain link point forwards a contract service program to execute after receiving an intelligent contract request from the user. By adopting the method and the system, the loading operation of the intelligent contract can be rapidly completed, and the convenience and the high efficiency of the intelligent contract calling of the block chain are improved.
Description
Technical Field
The invention belongs to the technical field of block chains, and particularly relates to an intelligent contract execution method for a block chain.
Background
The blockchain technology, as a brand-new distributed infrastructure and computing paradigm, covers a variety of technologies such as P2P networks, encryption algorithms, intelligent contracts, consensus algorithms, and the like. Based on the integrated technical stack, a block chain realizes a system with tamper resistance, traceability and decentralization, and effectively solves the problems of central authority, poor reliability, low safety and the like in the traditional mode.
A Smart contract (Smart contract) is a computer protocol intended to propagate, verify or execute contracts in an informational manner. Essentially, an intelligent contract in a blockchain is a piece of code that is written together by the various participants, validated, deployed on the blockchain, and run in sandbox form. However, most of the existing intelligent contract execution has the problems of complex design, difficult function expansion and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the block chain intelligent contract execution method, so that the loading operation of the intelligent contract is quickly completed, and the convenience and the efficiency of calling the block chain intelligent contract are improved.
In order to achieve the above purpose, the block chain intelligent contract execution method of the present invention comprises the following steps:
s1: setting a contract data service module and a contract loading module in a block link point, wherein the contract data service module is realized by Remote Procedure Call (RPC) based on a network socket Universal Description System (UDS) and is used for providing required service data for the execution of an intelligent contract target function, and the contract data service module is started in the form of the UDS when the block link point is started; the contract loading module is used for creating and starting a contract Docker container;
s2: the block chain link point receives a dynamic shared library of the intelligent contract and an intelligent contract deployment transaction from a user, and a file in the dynamic shared library is compiled by an intelligent contract source code; the block link points carry out validity check on the received intelligent contract deployment transaction, and the intelligent contract dynamic shared library is forwarded to the contract loading module after the check is passed;
s3: the contract loading module creates a contract Docker mirror image by using the received intelligent contract dynamic shared library and the basic environment Docker mirror image, then performs directory mapping on the contract and the block link point to obtain a directory mapping relation, and then creates and starts a contract Docker container by using the contract Docker mirror image and the directory mapping relation;
s4: starting a contract service program in the Docker container, analyzing a contract dynamic shared library in the starting process to create an intelligent contract instance, and creating a client communicated with a contract data service module;
s5: the block chain node receives an intelligent contract request from a user, wherein the intelligent contract request comprises a contract address, a target function name and an execution parameter thereof; the block chain link points carry out validity check on the received intelligent contract calling request, and the intelligent contract calling request is forwarded to a corresponding contract service program according to the contract address after the check is passed;
s6: firstly, analyzing a target function name and an execution parameter thereof in the intelligent contract calling request by a contract service program in the Docker container, and creating an instance object corresponding to an intelligent contract programming interface; then, acquiring a handle of the target function by using a reflection mechanism according to the contract instance and the target function name; finally, the target function execution parameter and the programming interface instance object are packaged into the request parameter of the target function, the corresponding processing logic is completed through the obtained target function handle, and the contract service program utilizes the instance object of the programming interface to obtain the corresponding service data from the contract data service module in the whole processing process.
The block chain intelligent contract execution method comprises the steps that a contract data service module and a contract loading module are arranged in a block chain link point, the block chain link point receives a dynamic shared library of an intelligent contract and intelligent contract deployment transaction from a user, the intelligent contract dynamic shared library is forwarded to the contract loading module for loading after validity check is carried out, a contract Docker container is created and started, then a contract service program is started, and the block chain link point forwards an intelligent contract request to the contract service program from the user to be executed after receiving the intelligent contract request.
The intelligent contract source code is compiled into a form of a dynamic shared library file, has the characteristics of concise code file and convenience for quick loading, adopts a Docker container mode to run the intelligent contract, and integrates a contract data service module, a contract loading module and a contract service program in a UDS service mode, has the characteristics of simple and convenient design, and can realize mutual calling among the intelligent contracts, so that the intelligent contracts are not mutually independent, and the expansion of service functions is facilitated.
Drawings
Fig. 1 is a flowchart of an embodiment of a method for executing a blockchain intelligent contract according to the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided in order to better understand the present invention for those skilled in the art with reference to the accompanying drawings. It is to be expressly noted that in the following description, a detailed description of known functions and designs will be omitted when it may obscure the subject matter of the present invention.
Examples
Fig. 1 is a flowchart of an embodiment of a method for executing a blockchain intelligent contract according to the present invention. As shown in fig. 1, the method for executing a block chain intelligent contract according to the present invention specifically includes the steps of:
s101: setting block chain nodes:
setting a contract data service module and a contract loading module in a block link point, wherein the contract data service module is realized by Remote Procedure Call (RPC) based on a network socket UDS (Unix Domain socket) and is used for providing required service data for the execution of an intelligent contract target function, and the contract data service module is started in the form of the UDS when the block link point is started; the contract load module is used to create and launch a contract Docker container.
S102: deploying intelligent contracts:
the block chain link point receives a dynamic shared library of the intelligent contract and an intelligent contract deployment transaction from a user, and a file in the dynamic shared library is compiled by an intelligent contract source code; and the block link points carry out validity check on the received intelligent contract deployment transaction, and forward the intelligent contract dynamic shared library to the contract loading module after the check is passed.
S103: contract loading:
the contract loading module creates a contract Docker mirror image by using the received intelligent contract dynamic shared library and the basic environment Docker mirror image, then carries out directory mapping on the contract and the block link point to obtain a directory mapping relation, and then creates and starts a contract Docker container by using the contract Docker mirror image and the directory mapping relation. The underlying environment Docker image only contains the Ubuntu operating system and the contract service program.
The specific process of directory mapping comprises the following steps:
1) associating a UDS file created when a contract data service module is started with a file in a Docker container;
2) associating a directory where a UDS file is located and created when a contract service program is started with a directory of the intelligent contract in a block chain node;
3) the directories of all the contracts in the blockchain are associated with the newly-created contract directory in the contract Docker container.
S104: contract service program starts:
and (3) starting a contract service program in the Docker container (the contract service program can be automatically started in an RPC service form based on the UDS after the contract Docker container is started), analyzing the contract dynamic shared library in the starting process to create an intelligent contract instance, and creating a client side for contract data service module communication. Wherein the intelligent contract instance is created by a contract service program using a reflection mechanism when loading the intelligent contract dynamic shared library, and the client in communication with the contract data service module is created by the contract service program using a UDS file of a contract data service in a contract Docker container.
S105: intelligent contract request processing:
the block chain node receives an intelligent contract request from a user, wherein the intelligent contract request comprises a contract address, a target function name and an execution parameter thereof; and the block chain link points carry out validity check on the received intelligent contract calling request, and the intelligent contract calling request is forwarded to a corresponding contract service program according to the contract address after the check is passed.
S106: executing an intelligent contract:
firstly, analyzing a target function name and an execution parameter thereof in the intelligent contract calling request by a contract service program in the Docker container, and creating an instance object corresponding to an intelligent contract programming interface; then, acquiring a handle of the target function by using a reflection mechanism according to the contract instance and the target function name; finally, the target function execution parameters and the programming interface instance object are packaged into request parameters of the target function, corresponding processing logic is completed through the obtained target function handle, and the contract service program utilizes the instance object of the programming interface to obtain corresponding service data through a client communicated with the contract data service module in the whole processing process.
In order to realize mutual calling among intelligent contracts, the contract service program can establish communication connection with the contract service programs in the contract Docker containers of other intelligent contracts by using the UDS files of all intelligent contracts in the contract Docker containers and send contract calling requests to the contract service programs, so that calling among the intelligent contracts is realized
In order to better explain the technical scheme of the invention, the invention is explained by taking the transfer application in the payment field as you, and the specific process is as follows:
the blockchain node starts a contract data services module in the form of a UDS at start-up.
The user writes Transfer contract code according to a programming interface predetermined by the contract service program, and a Transfer function in the contract code provides specific Transfer operation. And compiling the transfer contracts into a dynamic shared library by the user, packaging the dynamic shared library, and sending the dynamic shared library to the block link points to request contract deployment. And the block chain node firstly verifies the legality of the deployment request, after the legality passes, the contract loading module creates a Docker mirror image of the transfer contract by using the dynamic shared library of the transfer contract and the Docker mirror image of the basic environment, and then creates and starts a Docker container of the transfer contract by using the Docker mirror image of the transfer contract and the set directory mounting relation.
And starting a contract service program in the transfer contract Docker container, analyzing a dynamic shared library of the transfer contract to create a transfer contract instance object, then creating a client communicated with a contract data service module, and finally finishing the starting of the whole service in a UDS form.
And the user sends a contract calling request to the block link point, the contract address in the request is the contract address of the Transfer contract, the target function name is Transfer, and the execution parameter is that the user A transfers 10 yuan to the user B. And the block link point carries out validity check on the calling request, and forwards the request to the contract service program after the check is passed.
The contract service program firstly obtains a target function name Transfer and an execution parameter thereof from the contract calling request, the user A transfers 10 elements to the user B, then the contract service program creates an instance object corresponding to an intelligent contract programming interface, then a reflection mechanism is used for obtaining a function handle named Transfer from the Transfer contract instance object, then the execution parameter of the target function, the user A transfers 10 elements to the user B and the instance object of the programming interface are packaged into a request parameter of the target function, finally the parameter and the function handle of the Transfer are used for executing real Transfer operation logic, and when the Transfer logic is executed, the instance object of the programming interface is used for requesting corresponding business data through a client communicated with the contract data service module to complete account balance change.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
Claims (4)
1. A block chain intelligent contract execution method is characterized by comprising the following steps:
s1: setting a contract data service module and a contract loading module in a block link point, wherein the contract data service module is realized by Remote Procedure Call (RPC) based on a network socket Universal Description System (UDS) and is used for providing required service data for the execution of an intelligent contract target function, and the contract data service module is started in the form of the UDS when the block link point is started; the contract loading module is used for creating and starting a contract Docker container;
s2: the block chain link point receives a dynamic shared library of the intelligent contract and an intelligent contract deployment transaction from a user, and a file in the dynamic shared library is compiled by an intelligent contract source code; the block link points carry out validity check on the received intelligent contract deployment transaction, and the intelligent contract dynamic shared library is forwarded to the contract loading module after the check is passed;
s3: the contract loading module creates a contract Docker mirror image by using the received intelligent contract dynamic shared library and the basic environment Docker mirror image, then performs directory mapping on the contract and the block link point to obtain a directory mapping relation, and then creates and starts a contract Docker container by using the contract Docker mirror image and the directory mapping relation;
s4: starting a contract service program in the Docker container, analyzing a contract dynamic shared library in the starting process to create an intelligent contract instance, and creating a client communicated with a contract data service module;
s5: the block chain node receives an intelligent contract request from a user, wherein the intelligent contract request comprises a contract address, a target function name and an execution parameter thereof; the block chain link points carry out validity check on the received intelligent contract calling request, and the intelligent contract calling request is forwarded to a corresponding contract loading service program according to the contract address after the check is passed;
s6: firstly, analyzing a target function name and an execution parameter thereof in the intelligent contract calling request by a contract service program in the Docker container, and creating an instance object corresponding to an intelligent contract programming interface; then, acquiring a handle of the target function by using a reflection mechanism according to the contract instance and the target function name; finally, the target function execution parameter and the programming interface instance object are packaged into the request parameter of the target function, the corresponding processing logic is completed through the obtained target function handle, and the contract service program utilizes the instance object of the programming interface to obtain the corresponding service data from the contract data service module in the whole processing process.
2. The method of claim 1, wherein the step of mapping the directory in step S3 comprises:
1) associating a UDS file created when a contract data service module is started with a file in a Docker container;
2) associating a directory where a UDS file is located and created when a contract service program is started with a directory of the intelligent contract in a block chain node;
3) the directories of all the contracts in the blockchain are associated with the newly-created contract directory in the contract Docker container.
3. A method for block chain intelligent contract execution according to claim 1, wherein in step S4, the intelligent contract instance is created by a contract service program using a reflection mechanism when loading the intelligent contract dynamic shared library, and the client communicating with the contract data service module is created by the contract service program using a UDS file of the contract data service in the contract Docker container.
4. A block chain intelligent contract execution method according to claim 1, wherein the contract service program establishes a communication connection with the contract service programs in the contract Docker containers of other intelligent contracts by using UDS files of all intelligent contracts in the contract Docker containers, and sends contract call requests thereto.
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