WO2020015633A1 - Method and apparatus for realizing smart contract of blockchain - Google Patents

Abstract

The present invention provides a method and apparatus for realizing a smart contract of a blockchain. The method comprises: receiving a smart contract trading request initiated by a user; dividing data involved in the trading request into on-chain data and off-chain data; a consensus node of a blockchain performing consensus processing on on-chain data; and an off-chain computing power provider performing computation processing on off-chain data and providing a verification proof. According to the present invention, access to a heterogeneous data source, an on-chain data source, an off-chain data source and a hybrid data source is supported, and the consensus and calculation of a smart contract are decoupled from each other, thereby improving execution efficiency and the throughput capacity and greatly enhancing the service capability of the smart contract.

Description

Method and device for implementing blockchain smart contract Technical field

The present invention relates to data processing technology, and in particular to a method and device for implementing a blockchain smart contract.

Background technique

Smart contracts are one of the main features of blockchain 2.0 and 3.0 applications. However, the system's TPS (throughput) is generally low. For example, Ethereum processes about 15 transactions per second, compared to traditional centralized applications such as VISA or Taobao has tens of thousands or even hundreds of thousands of TPS per second. There is a big gap and cannot meet the application requirements. The reason is that traditional blockchains such as our familiar Ethereum platform, in order to ensure decentralization and security, both transaction execution and block consensus rely heavily on the serial processing of consensus nodes. The entire blockchain network has only a single computing performance. The computing power of the entire network cannot be fully utilized, causing a performance bottleneck.

At the same time, the traditional blockchain is a closed computing environment, and smart contracts can only access the internal data of the blockchain. On the one hand, the data on the chain is rapidly expanded, and the blocks are inflated, which ultimately leads to a further decline in transaction performance. On the other hand, based on data sovereignty and data privacy considerations, the data owner is unwilling to save the data on the chain. Using cryptographic encryption to save will cause the expansion of data and the reduction of smart contract processing capabilities.

The existing technology proposes a private transaction scheme based on the Ethereum enterprise blockchain to ensure the privacy of transactions and data. The transaction parties keep the private state tree locally, and the private transactions of the smart contract only access the data in the private state tree. This method ensures the privacy of the data and reduces the size of the public block data. However, the private state tree requires the data reached by the parties involved in the transaction, which still belongs to the on-chain data.

At present, the way for smart contracts to obtain data from external services is that the data is pushed into the blockchain by a third party, rather than being pulled by the smart contract. This passive way of receiving data depends on a third party for external interaction. How to ensure the credibility of the third party and the data, the current solution is to use oracles. There are two mainstream oracle solutions: Reality Keys: Provide A oracle scheme that can automatically check and encrypt oracle submissions. Oraclize: It is a provable and honest oracle service that relies on TLS notarization and provides a provable and honest ability to securely obtain information from Internet pages, allowing smart contracts to access the Internet and obtain valuable information.

However, the oracle solution of the prior art still allows smart contracts to passively accept data. At the same time, it is also a third party introduced, which ultimately leads to a limited scope of application of smart contracts and limited data credibility.

Summary of the invention

In order to improve the processing capacity of a blockchain smart contract, an embodiment of the present invention provides a method for implementing a blockchain smart contract, including:

Receive smart contract transaction requests initiated by users;

Distinguish the data involved in the transaction request into on-chain data and off-chain data;

Consensus processing of the data on the chain by consensus nodes of the blockchain;

The off-chain computing power provider calculates and processes the off-chain data and provides verification certificates.

In the embodiment of the present invention, dividing the data involved in the transaction request into on-chain data and off-chain data includes:

Determining the data involved in the current smart contract transaction according to the transaction request;

According to the source of the data involved in the transaction, the data involved in the current smart contract transaction is divided into on-chain data and off-chain data.

In the embodiment of the present invention, the on-chain data includes: data from the distributed ledger of the blockchain when the contract is executed;

The off-chain data includes data provided by a database of at least one data provider off-chain when a contract is executed.

In the embodiment of the present invention, when the data provider includes multiple data providers, each data provider uses the MPC algorithm to perform collaborative calculation.

In the embodiment of the present invention, the consensus processing of the data on the chain by the common nodes of the blockchain includes:

Obtaining on-chain data from the distributed ledger according to a transaction request;

According to the contract request, a matching computing power provider calculates the on-chain data and provides a calculation certificate to generate a calculation result; wherein the calculation result includes: transaction information, calculation result, calculation certificate, and contract status change;

According to the calculation result, the distributed ledger is changed for consensus processing.

At the same time, the present invention also provides a device for implementing a blockchain smart contract, including:

A request receiving module for receiving a smart contract transaction request initiated by a user;

A distinguishing module, configured to distinguish the data involved in the transaction request into on-chain data and off-chain data;

On-chain consensus module, the consensus nodes of the blockchain perform consensus processing on the data on the chain;

Off-chain data processing module. The off-chain computing power provider calculates and processes the off-chain data and provides verification certificates.

In the embodiment of the present invention, the distinguishing module includes:

A transaction data determining unit, configured to determine data related to a current smart contract transaction according to the transaction request;

The distinguishing unit distinguishes the data involved in the current smart contract transaction into on-chain data and off-chain data according to the source of the data involved in the transaction.

In the embodiment of the present invention, the on-chain data includes: data from the distributed ledger of the blockchain when the contract is executed; the off-chain data includes: data provided by at least one data provider off-chain when the contract is executed.

In the embodiment of the present invention, when the data provider includes multiple data providers, each data provider uses the MPC algorithm to perform collaborative calculation.

In the embodiment of the present invention, the on-chain consensus module performs consensus processing on the on-chain data source by the consensus nodes of the blockchain including:

Obtaining on-chain data from the distributed ledger according to a transaction request;

According to the contract request, a matching computing power provider calculates the data on the chain and provides a calculation certificate to generate a calculation result; wherein the calculation result includes: transaction information, calculation result, calculation certificate, and contract status change;

According to the calculation result, the distributed ledger is changed for consensus processing.

At the same time, the present invention also provides a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor implements the above method when the computer program is executed.

At the same time, the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program for executing the above method.

The method and device for implementing smart contracts provided by the present invention support access to heterogeneous data sources, on-chain data sources, off-chain data sources, and hybrid data sources. For off-chain data, multi-party secure computing (MPC) and verifiable computing (VC) are adopted to ensure data privacy and verify the correctness of the calculation.

In order to make the above and other objects, features, and advantages of the present invention more comprehensible, the preferred embodiments are described below in detail with the accompanying drawings, as follows.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative labor.

FIG. 1 is a flowchart of a method for implementing a blockchain smart contract disclosed in the present invention;

FIG. 2 is a structural diagram of a blockchain smart contract implementation method disclosed in the present invention;

3 is a schematic diagram disclosed in an embodiment of the present invention;

FIG. 4 is a schematic diagram disclosed in an embodiment of the present invention

FIG. 5 is a diagram of an electronic device disclosed in an embodiment of the present invention.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The present invention provides a method for implementing a blockchain smart contract. As shown in FIG. 1, the method includes:

Step S101: Receive a smart contract transaction request initiated by a user;

Step S102, distinguish the data involved in the transaction request into on-chain data and off-chain data;

Step S103: A consensus node of the blockchain performs consensus processing on the data on the chain;

In step S104, the off-chain computing power provider performs calculation processing on the off-chain data and provides a verification certificate.

The innovation of the technical solution of the present invention is the decoupling of consensus and calculation, so that smart contracts can support access to on-chain data sources and off-chain data sources, that is, settlement of on-chain data and off-chain data that require consensus processing in smart contract requests Decoupling, as shown in FIG. 2 is a structural diagram of an embodiment of the present application.

The invention decouples consensus from calculation, and enables the system to support both on-chain and off-chain data. From the system architecture, the contract is divided into IO logic related to the state on the chain and computing logic not related to the state on the chain. It is a meta smart contract.

The state-related IO logic is processed by the consensus nodes on the blockchain, and the state changes and results are broadcast to the blockchain, and each node writes to the local database after verification;

The state-independent calculation logic is distributed to the computing power provider for parallel calculation, which greatly improves the calculation efficiency. Furthermore, in the embodiment of the present invention, an encryption circuit is used to perform multi-party secure calculation of MPC to ensure data privacy. In the embodiment of the present application, for protecting data privacy, ordinary Boolean circuits can be used for calculation. The circuit logic (whether encrypted or not) can be accelerated using dedicated hardware, on the one hand, to increase the utilization of idle resources, and at the same time to improve computing efficiency.

In the embodiment of the present invention, according to different data sources, smart contracts are classified into three types in the specific implementation of this embodiment: state contracts, stateless contracts, and hybrid contracts.

State contract: The process of state contract is similar to the traditional smart contract. As shown in Figure 3, it is a schematic diagram of the state contract execution in this embodiment. The state contract needs to save the state on the chain. The data entered during the execution of the state contract comes from the on-chain distribution. Type ledger, each time the contract is executed will cause the contract status to change, and all changes will be recorded in the distributed ledger. The calculation of the contract is divided into multiple sub-tasks and distributed to multiple computing nodes. The contract developer can choose a private computing method to ensure that the data is not disclosed to the computing nodes.

The contract developer issues a smart contract to the blockchain, and the user initiates a smart contract transaction request. If the data involved in the smart contract transaction request comes from the chain, the state contract in the embodiment of this application is executed. The specific steps performed by the state contract in this embodiment are as follows:

1. The algorithm provider develops and deploys state contracts;

2. The calculation initiator initiates a transaction request and calls a state contract that meets the demand, and its data comes from the chain;

3. When the status contract receives a transaction request, it will first trigger a special calculation channel contract call, and its role is to pledge a certain asset to the transaction initiator;

4. According to the transaction request, the contract finds a matching computing power provider, and distributes the request to one or more sub-tasks to the appropriate computing power provider;

5. The computing power provider performs calculations and provides calculation certificates;

6. After the calculation is completed, any participant can send a transaction to the calculation channel contract, thereby closing the channel and starting a settlement process, but the calculation channel will not be settled immediately, and a time interval will be started first. Each party can submit an objection to the calculation process;

7. After the task is completed and the settlement is completed, return the remaining assets to the transaction initiator;

8. Consensus nodes package transactions, calculation results, calculation proofs, and contract status changes into blocks;

9. The block node writes the block to the local ledger.

Stateless contracts: Stateless contracts do not save any state on the chain, as shown in Figure 4, which is a schematic diagram of the execution of state contracts in this embodiment. The data entered during stateless contract execution comes from the off-chain data provider's local database, which can be a single data provider or multiple data providers. If there are multiple data providers, multiple parties use the MPC algorithm to perform collaborative calculations to ensure the ownership of the data by the parties. The actual calculation is divided into multiple subtasks and distributed to multiple computing nodes. The contract developer can choose the privacy calculation method. To ensure that the data is not disclosed to the compute nodes. In this embodiment, the execution steps of a stateless contract are as follows:

1. Algorithm provider develops and deploys stateless contracts;

2. Calculate the initiator to initiate a transaction request and call a stateless contract that meets the demand, and its data comes from off-chain;

3. When a stateless contract receives a transaction request, it will first trigger a special calculation channel contract call, and its role is to pledge a certain asset to the transaction initiator;

4. According to the transaction request, the contract finds a matching computing power provider, and distributes the request to one or more sub-tasks to the appropriate computing power provider. If there are multiple data providers, the contract developer can choose the privacy calculation. To ensure that the data is not disclosed to the computing nodes: if you choose to use the MPC algorithm for collaborative calculations, ensure the ownership of the data by all parties;

5. The data provider and the computing power provider perform collaborative calculations and provide verifiable calculation certificates;

6. After the calculation is completed, any participant can send a transaction to the calculation channel contract, thereby closing the channel and starting a settlement process, but the calculation channel will not be settled immediately, and a time interval will be started first. Each party can submit an objection to the calculation process;

7. After the task is completed and the settlement is completed, return the remaining assets to the transaction initiator;

8. Consensus nodes package transactions, calculation results, and calculation certificates into blocks;

9. The block node writes the block to the local ledger.

Hybrid contracts: Allow smart contracts to save state on the chain, and have off-chain data participate in calculations. This type of contract is called a hybrid contract, which means that the data involved in the execution of a smart contract includes both on-chain data and off-chain data providers. The hybrid contract is actually a kind of multi-source data calculation. The consensus node participates in the calculation as the data provider of the on-chain state data. The typical use scenario of a hybrid contract is to save the calculation results of the data off-chain to the chain and participate in the next calculation.

The smart contract implementation method provided by the present invention decouples consensus from calculation, so that the consensus part of the smart contract is done on the chain, and the computing part can be processed in parallel by one or more computing nodes, thereby improving the smart contract execution efficiency and throughput the amount. Correspondingly, smart contracts can be executed on-chain or on-chain or off-chain at the same time. Executing some functions of smart contracts off-chain or executing complete smart contracts can be distributed and executed in parallel; or within several nodes Between executions, all parties jointly maintain a multi-signature off-chain status. When necessary, they can return to the chain to do consensus and write the state of the chain.

For the processing of off-chain data or the execution of smart contracts, back to the blockchain through various methods such as verifiable certificates or multi-signature, corresponding verifiable certificates, transaction status or results, and contract changes can be written as needed. Into the blockchain, by decoupling the consensus and calculation during the execution of smart contracts, the off-chain data involved in the calculation is executed by the off-chain computing power provider, expanding the scope of application of smart contracts, and processing off-chain data. It greatly enhances the business capabilities of smart contracts, and can also be used as a technology for off-chain capacity expansion. At the same time, it can return to the chain, ensuring the same security features as traditional contracts, such as non-repudiation, non-changeability, and reliability.

In order to lower the threshold for developers, this embodiment designs a Turing complete C-style high-level language for writing smart contracts and compiling them into Boolean circuits. In this embodiment, the main features of the smart contract language are as follows:

1. Data type:

1.1 Basic data types, as shown in Table 1:

Table 1

Types of	Digit	Value range
bool	8	Values are 0 and 1
int8	8	-128 ～ 127
uint8	8	0 ～ 255
int16	16	-32768 ～ 32767
uint16	16	0 to 65535
int32	32	-2147483648 ～ 2147483647
uint32	32	0 ～ 4294967295
int64	64	-9223372036854775808 ～ 9223372036854775807
uint64	64	0 ～ 18446744073709551615

1.2 Custom data types:

Structure: C-like Struct is supported to define structures. Structures allow you to define variables that can store different types of data items.

Array: supports an array data structure, which can store a fixed-size sequential collection of elements of the same type, and supports multidimensional arrays.

2. Operator:

The arithmetic operators are shown in Table 2:

Table 2

Operator	description
+	Add two operands
-	Subtract the second operand from the first operand
*	Multiply two operands
/	Numerator divided by denominator
%	Modulo operator, remainder after division

2.2 Relational Operators:

In this embodiment, the operators and corresponding descriptions are shown in Table 3 below:

table 3

2.3-bit operators, as shown in Table 4:

Table 4

2.4 Assignment operators, as shown in Table 5:

table 5

3. Control statement:

Condition judgment statement, as shown in Table 6:

Table 6

3.2 loop statements

A loop statement allows multiple executions of a statement or group of statements. The loop statement looks like this:

for (int32i = 0; i <max; i ++)

{

}

4. Function definition:

A function is a set of statements that perform a task together. The function is defined as follows:

functionreturn_typefoo (paramtype1 name1, paramtype2 name2, paramtype3 [5] name3) {

return

}

The invention is mainly applicable to the related products or services of the blockchain, applications or systems with smart contracts, including solutions of public chains or alliance chains. The invention proposes a smart contract method that supports access to on-chain and off-chain data, slows down the expansion of block data, and guarantees data privacy and security.

At the same time, the present invention also provides a device for implementing a blockchain smart contract, including:

A request receiving module for receiving a smart contract transaction request initiated by a user;

A distinguishing module, configured to distinguish the data involved in the transaction request into on-chain data and off-chain data;

On-chain consensus module, the consensus nodes of the blockchain perform consensus processing on the data on the chain;

Off-chain data processing module. The off-chain computing power provider calculates and processes the off-chain data and provides verification certificates.

In the embodiment of the present invention, the distinguishing module includes:

A transaction data determining unit, configured to determine data related to a current smart contract transaction according to the transaction request;

The distinguishing unit distinguishes the data involved in the current smart contract transaction into on-chain data and off-chain data according to the source of the data involved in the transaction.

For those skilled in the art, according to the foregoing embodiments of the method, the implementation means of the blockchain smart contract implementation device in the embodiments of the present invention can be clearly known, and therefore, the device embodiments are not further described here.

An embodiment of the present invention further provides an electronic device. The electronic device may be a desktop computer, a tablet computer, a mobile terminal, or the like. This embodiment is not limited thereto. In this embodiment, the electronic device may refer to the implementation of the method of the foregoing embodiment, and its content is incorporated herein, and the repeated description is omitted.

FIG. 5 is a schematic block diagram of a system configuration of an electronic device 600 according to an embodiment of the present invention. As shown in FIG. 5, the electronic device 600 may include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace the structure to implement telecommunication functions or other functions.

In one embodiment, the blockchain smart contract implementation function may be integrated into the central processor 100. The central processor 100 may be configured to perform the following control: receiving a smart contract transaction request initiated by a user;

Distinguish the data involved in the transaction request into on-chain data and off-chain data;

Consensus processing of the data on the chain by consensus nodes of the blockchain;

The off-chain computing power provider calculates and processes the off-chain data and provides verification certificates.

As shown in FIG. 5, the electronic device 600 may further include a communication module 110, an input unit 120, an audio processing unit 130, a display 160, and a power source 170. It is worth noting that the electronic device 600 does not necessarily need to include all the components shown in FIG. 5; in addition, the electronic device 600 may also include components not shown in FIG. 5, and reference may be made to the prior art.

As shown in FIG. 5, the central processing unit 100 is sometimes referred to as a controller or an operation control, and may include a microprocessor or other processor devices and / or logic devices. The central processing unit 100 receives input and controls each of the electronic devices 600. Operation of parts.

The memory 140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. The above-mentioned failure-related information can be stored, and a program for executing the related information can also be stored. In addition, the central processing unit 100 may execute the program stored in the memory 140 to implement information storage or processing.

The input unit 120 provides input to the central processing unit 100. The input unit 120 is, for example, a key or a touch input device. The power source 170 is used to provide power to the electronic device 600. The display 160 is used for displaying display objects such as images and characters. The display may be, for example, an LCD display, but is not limited thereto.

The memory 140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), a SIM card, and the like. It may also be a memory that holds information even when power is off, can be selectively erased and is provided with more data, and an example of the memory is sometimes called EPROM or the like. The memory 140 may also be some other type of device. The memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application / function storage section 142 for storing application programs and function programs or a flow for performing operations of the electronic device 600 through the central processing unit 100.

The memory 140 may further include a data storage section 143 for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage section 144 of the memory 140 may include various drivers for the electronic device for communication functions and / or for performing other functions of the electronic device (such as a messaging application, an address book application, etc.).

The communication module 110 is a transmitter / receiver 110 that transmits and receives signals via the antenna 111. A communication module (transmitter / receiver) 110 is coupled to the central processing unit 100 to provide input signals and receive output signals, which may be the same as the case of a conventional mobile communication terminal.

Based on different communication technologies, multiple communication modules 110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module, and / or a wireless local area network module. The communication module (transmitter / receiver) 110 is also coupled to the speaker 131 and the microphone 132 via the audio processor 130 to provide audio output via the speaker 131 and to receive audio input from the microphone 132, thereby realizing general telecommunication functions. The audio processor 130 may include any suitable buffers, decoders, amplifiers, and the like. In addition, the audio processor 130 is also coupled to the central processing unit 100, so that the microphone 132 can be used to record on the unit, and the speaker 131 can be used to play the sound stored on the unit.

At the same time, the present invention also provides a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor. The processor implements the above method when the computer program is executed.

At the same time, the present invention also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program for executing the above method.

The method and device for implementing smart contracts disclosed by the present invention can support on-chain, off-chain data, or both on-chain and off-chain data. IO logic is responsible for processing on-chain data, including reading data from the chain, performing consensus processing, and Write the result or status after processing to the chain. Computation logic processes out-of-chain data, including computing task publishing and distribution, computing task splitting into multiple subtasks, computing task compilation into Boolean circuits, and acceleration with dedicated hardware, computing nodes accepting tasks for verifiable calculations, returning calculation results, and Verification certificate, calculation result verification, etc.

If multiple data sources are involved (including on-chain data and data provided by multiple data parties off the chain), in order to ensure data privacy, each data provider (consensus node as the on-chain data provider) can jointly perform multi-party secure computing to Get calculation results.

This application decouples the consensus of the contract from the calculation. The consensus part is executed on the chain (consensus by the consensus node and written into the blockchain), and the calculation part is distributed to the computing power provider for parallel calculation. This has the advantage of expanding the scope of application of the contract, at the same time speeding up the execution of the contract, and increasing the throughput of the blockchain.

Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that the instructions generated by the processor of the computer or other programmable data processing device are used to generate instructions Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a particular manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions The device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

The principles and implementations of the present invention are described by applying specific embodiments in the present invention. The descriptions of the above embodiments are only used to help understand the method of the present invention and its core ideas; meanwhile, for a person of ordinary skill in the art, The idea of the invention will change in both the specific implementation and the scope of application. In summary, the content of this description should not be construed as a limitation on the present invention.

Claims (12)

1. A method for implementing a blockchain smart contract, characterized in that the method includes:

   Receive smart contract transaction requests initiated by users;

   Distinguish the data involved in the transaction request into on-chain data and off-chain data;

   Consensus processing of the data on the chain by consensus nodes of the blockchain;

   The off-chain computing power provider calculates and processes the off-chain data and provides verification certificates.
2. The method for implementing a smart contract of a blockchain according to claim 1, wherein distinguishing the data involved in the transaction request into on-chain data and off-chain data comprises:

   Determining the data involved in the current smart contract transaction according to the transaction request;

   According to the source of the data involved in the transaction, the data involved in the current smart contract transaction is divided into on-chain data and off-chain data.
3. The method for implementing a blockchain smart contract according to claim 2, wherein:

   The on-chain data includes: data from the distributed ledger of the blockchain when the contract is executed;

   The off-chain data includes data provided by at least one data provider off-chain when a contract is executed.
4. The method for implementing a blockchain smart contract according to claim 3, wherein when the data provider includes a plurality of data providers, each data provider uses the MPC algorithm for collaborative calculation.
5. The method for implementing a blockchain smart contract according to claim 3, wherein the consensus processing of the data on the chain by the common nodes of the blockchain comprises:

   Obtaining on-chain data from the distributed ledger according to a transaction request;

   According to the contract request, a matching computing power provider calculates the on-chain data and provides a calculation certificate to generate a calculation result; wherein the calculation result includes: transaction information, calculation result, calculation certificate, and contract status change;

   According to the calculation result, the distributed ledger is changed for consensus processing.
6. A blockchain smart contract implementation device, characterized in that the device includes:

   A request receiving module for receiving a smart contract transaction request initiated by a user;

   A distinguishing module, configured to distinguish the data involved in the transaction request into on-chain data and off-chain data;

   On-chain consensus module, the consensus nodes of the blockchain perform consensus processing on the data on the chain;

   Off-chain data processing module. The off-chain computing power provider calculates and processes the off-chain data and provides verification certificates.
7. The device for implementing a blockchain smart contract according to claim 6, wherein the distinguishing module comprises:

   A transaction data determining unit, configured to determine data related to a current smart contract transaction according to the transaction request;

   The distinguishing unit distinguishes the data involved in the current smart contract transaction into on-chain data and off-chain data according to the source of the data involved in the transaction.
8. The device for implementing a blockchain smart contract according to claim 7, wherein:

   The on-chain data includes: data from the distributed ledger of the blockchain when the contract is executed;

   The off-chain data includes data provided by at least one data provider off-chain when a contract is executed.
9. The device for implementing a blockchain smart contract according to claim 8, wherein, when the data provider includes a plurality of data providers, each data provider uses the MPC algorithm to perform collaborative calculation.
10. The device for implementing a blockchain smart contract according to claim 8, wherein the on-chain consensus module performs consensus processing on the on-chain data source by a consensus node of the blockchain, comprising:

    Obtaining on-chain data from the distributed ledger according to a transaction request;

    According to the contract request, a matching computing power provider calculates the on-chain data and provides a calculation certificate to generate a calculation result; wherein the calculation result includes: transaction information, calculation result, calculation certificate, and contract status change;

    According to the calculation result, the distributed ledger is changed for consensus processing.
11. A computer device includes a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the processor implements any one of claims 1 to 5 when the computer program is executed. method.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program that executes the method according to any one of claims 1 to 5.

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