WO2021031472A1

WO2021031472A1 - Intelligent contract processing method and device, computer device and storage medium

Info

Publication number: WO2021031472A1
Application number: PCT/CN2019/125615
Authority: WO
Inventors: 郭加楼; 来鑫; 陈磊
Original assignee: 深圳市网心科技有限公司
Priority date: 2019-08-20
Filing date: 2019-12-16
Publication date: 2021-02-25
Also published as: CN110517138A

Abstract

Disclosed are an intelligent contract processing method, comprising: when a blockchain node receives a transaction request of UTXO assets from a first account, converting the UTXO assets to be transacted into input information of an intelligent contract to be called by a transaction; calling a target intelligent contract instruction corresponding to the input information by means of a virtual machine to execute the transaction; and updating the UTXO asset state of the first account according to the contract state returned by the virtual machine. Further disclosed are an intelligent contract processing device, a computer device and a storage medium. According to the present invention, the contract transaction request of the UTXO asset is converted into an input message of the Turing-complete intelligent contract, so that the UTXO asset can call the Turing-complete contract to perform asset transfer or more complex functions.

Description

Smart contract processing method, device, computer equipment and storage medium

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on August 20, 2019. The application number is 201910769532.4 and the invention title is "Smart contract processing methods, devices, computer equipment and storage media". The entire content is by reference Incorporated in this application.

Technical field

The present invention relates to the field of blockchain technology, and in particular to a smart contract processing method, device, computer equipment and storage medium.

Background technique

Blockchain is a decentralized and distributed computer system, and smart contracts are the core of blockchain transaction generation and verification, ensuring that assets can be exchanged between two parties without the need for third-party institutions. Transfer to ensure the safety of all links in currency circulation.

Different blockchain systems may use different digital asset models. Representative examples include Unspent Transaction Output (UTXO) asset models and Account asset models. The mainstream UTXO asset model only supports the blockchain Although the non-Turing complete contract is simple to use and has high security, the instruction set used to implement the contract function does not contain complex instructions such as loops. Therefore, the realized contract functions are limited. However, it is very difficult to directly implement smart contracts that support Turing completeness based on the UTXO model.

Therefore, it is necessary to provide a new smart contract processing solution to solve the technical problem that the UTXO asset model cannot directly implement Turing-complete smart contracts.

Summary of the invention

The main purpose of the present invention is to provide a smart contract processing method, device, computer equipment and storage medium, which aims to solve the technical problem that the UTXO asset model cannot directly realize the Turing-complete smart contract. By changing the contract transaction request of the UTXO asset to The input message of Turing's complete smart contract enables UTXO assets to call Turing's complete contract for asset transfer or more complex functions.

To achieve the above objective, the first aspect of the present invention provides a smart contract processing method, the method includes:

When the blockchain node receives the UTXO asset transaction request from the first account, it converts the UTXO asset to be traded into the input information of the smart contract to be called by the exchange;

Calling the target smart contract instruction corresponding to the input information through a virtual machine to execute the transaction;

Update the state of the UTXO asset of the first account according to the contract state returned by the virtual machine.

According to an optional embodiment of the present invention, the method further includes:

Compile smart contracts written in Turing complete language to generate smart contract instructions;

The smart contract is deployed according to the smart contract instruction and the initial contract state.

According to an optional embodiment of the present invention, when the blockchain node receives a UTXO asset transaction request from the first account, it converts the UTXO asset to be traded into the input information of the smart contract to be called by the exchange include:

Determining the first account as the transfer-out account in the input information;

Determining the input amount in the transaction request as the transfer-out amount in the input information;

The input handling fee in the transaction request is determined as the transaction handling fee in the input information.

According to an optional embodiment of the present invention, before the invoking the target smart contract instruction corresponding to the input information through the virtual machine to execute the transaction, the method further includes:

Determine whether the sum of the transfer amount and the transaction fee is greater than the remaining face value in the UTXO asset;

When the sum of the transfer-out amount and the transaction fee is less than the remaining face value in the UTXO asset, calculate the sum of the transfer-out amount and the transaction fee and the remaining face value in the UTXO asset The difference;

Convert the amount corresponding to the difference in the Account asset into the UTXO asset.

Determine whether the transaction fee is greater than the fee required to execute the transaction;

When the transaction fee is greater than or equal to the fee required to execute the transaction, execute the transaction through the virtual machine;

When the transaction fee is less than the fee required for executing the transaction, terminate the virtual machine to execute the transaction.

According to an optional embodiment of the present invention, the commission required to execute the transaction is determined in the following manner:

Invoking the target smart contract instruction according to the input amount through the virtual machine;

The handling fee generated by calling the target smart contract instruction to execute the transaction determines the handling fee required for executing the transaction;

Shows the fee required to execute the transaction.

According to an optional embodiment of the present invention, after the transaction request is executed, the method further includes:

Return the excess handling fee to the first account; or,

Create a new UTXO based on the excess handling fee and return it to the first account.

In order to achieve the above objective, a second aspect of the present invention provides a smart contract processing device, which includes:

The conversion module is used to convert the UTXO asset to be traded into the input information of the smart contract to be called by the exchange when the blockchain node receives the transaction request of the UTXO asset from the first account;

The calling module is used to call the target smart contract instruction corresponding to the input information through a virtual machine to execute the transaction;

The update module is used to update the UTXO asset status of the first account according to the contract status returned by the virtual machine.

In order to achieve the above objective, a third aspect of the present invention provides a computer device, the computer device includes a memory and a processor, the memory stores a download program for smart contract processing that can run on the processor, and When the download program processed by the smart contract is executed by the processor, the smart contract processing method is realized.

In order to achieve the above objective, the fourth aspect of the present invention provides a computer-readable storage medium, the computer-readable storage medium stores a download program for smart contract processing, and the download program for smart contract processing can be used by one or more Each processor executes to implement the smart contract processing method.

The smart contract processing method, device, computer equipment, and storage medium described in the embodiments of the present invention convert the UTXO asset to be traded into the input information of the smart contract to be called by the exchange; and then call the input information through a virtual machine The target smart contract instruction corresponding to the information executes the transaction; finally, the UTXO asset status of the first account is updated according to the contract status returned by the virtual machine. UTXO assets can call Turing's complete contract for asset transfer or more complex functions.

Description of the drawings

FIG. 1 is a schematic flowchart of a smart contract processing method according to a first embodiment of the present invention;

2 is a schematic diagram of functional modules of a smart contract processing device according to a second embodiment of the present invention;

Fig. 3 is a schematic diagram of the internal structure of a computer device according to a third embodiment of the present invention.

The realization of the objectives, functional characteristics and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first" and "second" in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

It should be noted that the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. . Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that this combination of technical solutions does not exist , Is not within the protection scope of the present invention.

Example one

Refer to FIG. 1, which is a flowchart of the smart contract processing method disclosed in the first embodiment of the present invention.

The smart contract processing method specifically includes the following steps. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

S11: When the blockchain node receives the transaction request of the UTXO asset from the first account, it converts the UTXO asset to be traded into input information of the smart contract to be called by the exchange.

In this embodiment, at least two accounts can be created in the blockchain node, and the at least two accounts include two or more accounts. Exemplarily, a first account and a second account are created in a blockchain node. The first account may be an unspent Transaction Output (UTXO) account. Based on the UTXO asset model, the second account may be Account account, based on the Account asset model.

The user can select any account through the blockchain node as the initiating account of the contract transaction request (hereinafter referred to as the "transaction request"). For example, there are two contract accounts displayed on the blockchain node: UTXO account and Account account. The user can select the UTXO account as a contract transaction request by clicking or touching the virtual icon or physical button corresponding to the UTXO account displayed on the blockchain node Originating account. Or, by clicking or touching the virtual icon or physical button corresponding to the Account account displayed on the blockchain node, the Account account is selected as the initiating account of the contract transaction request.

Wherein, the contract transaction request includes description information of the execution contract. The description information of the execution contract may include: input parameters of the execution contract and so on. The description information of the executed contract corresponding to different contract accounts is different.

In an optional embodiment, when the blockchain node receives a UTXO asset transaction request from the first account, the input information for converting the UTXO asset to be traded into a smart contract to be called by the exchange includes :

In this optional embodiment, in order to increase the enthusiasm of miners on the blockchain, the smart contract adopts the Gas incentive mechanism, that is, when the smart contract is executed, a service fee is required.

The contract transaction request carries at least an input amount and an input handling fee. The input amount refers to the transfer amount input by the user through the blockchain node for contract transactions, and the input handling fee refers to the user passing through the zone. The commission entered by the blockchain node to execute contract transactions. The input information of the smart contract may include: the transfer-out account, the transfer-out amount, and the transaction fee (that is, the payment for the transaction fee for executing the transaction). By transforming the contract transaction request of UTXO asset into the input message of Turing complete smart contract, UTXO asset can call Turing complete contract for asset transfer or more complex functions.

In an optional embodiment, when a blockchain node receives a transaction request for Account assets from a second account, it determines that the second account is the transfer-out account of the smart contract, and the transaction The input amount in the request is determined as the transfer-out amount in the input information, and the input handling fee in the transaction request is determined as the transaction handling fee in the input information.

In an optional embodiment, before S11, the method may further include:

In this optional embodiment, all calculable problems can be calculated, and such a virtual machine or programming language is called Turing complete. Turing complete programming languages can include, but are not limited to: Sodility, c, c++, C#, pascal, List Processing (LISP) language, etc. Since the smart contract is written in a Turing complete language, the functions of the smart contract implemented in this optional embodiment can be flexible and more complex.

S12, calling a target smart contract instruction corresponding to the input information through a virtual machine to execute the transaction.

In this embodiment, the virtual machine is Turing complete and includes a calculator and an instruction system.

After converting the contract transaction request into the input information of the smart contract, the input information is sent to the virtual machine for execution. In the process of executing the transaction, the virtual machine will generate a series of contract states, such as contract member variables, contract function entry address table, global variable table, static variable table, etc. The data structure of these contract states can include simple lists or complex multi-dimensional data structures. The virtual machine can convert these contract states into key-value (KV, Key-Value) form for storage, and save them in databases such as LevelDB.

The virtual machine can also return the storage address of these contract states to the blockchain network. The correspondence between the previously generated transaction identifier and the storage address is recorded in the ledger of the blockchain network.

In an optional embodiment, before splitting the face value of the UTXO asset corresponding to the income amount carried in the contract transaction request into the transfer-out amount and the transaction fee, the method further includes:

In this alternative embodiment, the face value in the UTXO account must be greater than the sum of the transfer amount and the transaction fee. When the face value in the UTXO account is less than the sum of the transfer amount and the transaction fee, part of the amount in the Account account can be converted to the corresponding face value of the UTXO account, so that the new face value in the UTXO account is greater than the transfer amount and transaction fee The sum of, so as to realize the function of the smart contract.

S13: Update the state of the UTXO asset of the first account according to the contract state returned by the virtual machine.

In this embodiment, the virtual machine uses the input information of the smart contract to execute the transaction. After the execution, the execution result of the related function in the contract is obtained, the contract state is transferred, and a new contract state is generated and returned to the blockchain node . The new contract status can include the usage of prepaid fees. For example, which contract account has spent how much fees, and how many fees are left. For another example, which contract account received how many fees. The blockchain node updates the state of the UTXO asset of the first account according to the new contract state returned by the virtual machine. For example, when the smart contract executed by the virtual machine is a transfer, the blockchain node updates the balance status in the initiating account of the contract transaction request according to the balance status returned by the virtual machine.

In an optional embodiment, the method further includes:

In this optional embodiment, the transaction fee in the input information refers to a fee paid in advance. Since the handling fee required for each execution of the transaction may change over time, the handling fee required for the actual execution of the transaction is uncertain.

When the virtual machine actually executes the transaction, it needs to determine whether the transaction fee in the input information is greater than the transaction fee required to execute the transaction, that is, to determine whether the prepaid fee can execute the transaction. When the virtual machine determines that the transaction fee is greater than or equal to the fee required to execute the transaction, it is determined that the prepaid fee can execute the transaction, so that the transaction can be executed through the virtual machine. When the virtual machine determines that the transaction fee is less than the transaction fee required for executing the transaction, it is determined that the prepaid fee cannot execute the transaction, thereby terminating the virtual machine from executing the transaction.

In an optional embodiment, the commission required to execute the transaction is determined in the following manner:

The handling fee generated by calling the target smart contract instruction to execute the transaction determines the handling fee required for executing the transaction.

In this optional embodiment, when the virtual machine receives the input information of the smart contract, it first simulates the execution of the smart contract once, and uses the transaction fee generated during the simulation of the transaction as the execution of the transaction The required handling fee. The virtual machine can also display the commission generated by the simulation on the blockchain node for users to view. The transaction can be executed only when the transaction fee in the input information is greater than the fee required to execute the transaction.

In an optional embodiment, after the transaction request is executed, the method further includes:

Return the excess handling fee to the first account; or,

The virtual machine can implement a refund operation during the execution of the smart contract. If the transaction fee is greater than or equal to the fee required to execute the transaction, indicating that the transaction fee in the input information is redundant or surplus, the excess or remaining fee can be returned to the user through a refund operation.

In an optional embodiment, when the blockchain node receives a transaction request for the Account asset from the second account and after the transaction request is executed, the method further includes:

Return the excess handling fee to the second account or the first account.

Exemplarily, the excess Account assets are returned to the second account, or the Account assets are first converted into UTXO assets, and then returned to the second account. As for the method to choose to return the excess or remaining transaction fees, it can be preset or adjusted according to the actual situation to improve the versatility of the contract account and enhance the user experience.

In the smart contract processing method described in this implementation, the UTXO asset to be traded is converted into the input information of the smart contract to be called by the exchange; and then the target smart contract instruction corresponding to the input information is invoked through the virtual machine to execute the Transaction; Finally, the UTXO asset status of the first account is updated according to the contract status returned by the virtual machine. UTXO assets can call Turing's complete contract for asset transfer or more complex functions.

Example two

Refer to FIG. 2, which is a schematic diagram of functional modules of the smart contract processing device disclosed in the second embodiment of the present invention.

In some embodiments, the smart contract processing device 20 runs in a resource server. The smart contract processing device 20 may include multiple functional modules composed of download programs. The program code of each download program in the smart contract processing device 20 can be stored in the memory of the computer device and executed by the at least one processor to execute (see FIG. 1 for details) the processing of the smart contract.

In this embodiment, the smart contract processing device 20 can be divided into multiple functional modules according to the functions it performs. The functional modules may include: a deployment module 201, a conversion module 202, a calling module 203, a judgment module 204, a calculation module 205, an update module 206, a first return module 207, and a second return module 208. The module referred to in the present invention refers to a series of download programs that can be executed by at least one processor and can complete fixed functions, and are stored in a memory. In this embodiment, the function of each module will be described in detail in subsequent embodiments.

The deployment module 201 is used to deploy smart contracts.

Specifically, the deployment of the smart contract by the deployment module 201 includes:

The conversion module 202 is used for converting the UTXO asset to be traded into the input information of the smart contract to be called by the exchange when the blockchain node receives the transaction request of the UTXO asset from the first account.

The user can select any account through the blockchain node as the initiating account of the contract transaction request (hereinafter referred to as the "transaction request"). For example, there are two contract accounts displayed on the blockchain node: UTXO account and Account account. The user can select the UTXO account as a contract transaction request by clicking or touching the virtual icon or physical button corresponding to the UTXO account displayed on the blockchain node Originating account. Or, by clicking or touching the virtual icon or physical button corresponding to the Account account displayed on the blockchain node to select the Account account as the initiating account of the contract transaction request.

In an optional embodiment, the conversion module 202 converts the UTXO asset to be traded into the smart contract to be called by the exchange when the blockchain node receives a transaction request for the UTXO asset from the first account. Input information includes:

The contract transaction request carries at least an input amount and an input handling fee. The input amount refers to the transfer amount input by the user through the blockchain node for contract transactions, and the input handling fee refers to the user passing through the zone. The commission entered by the blockchain node to execute contract transactions. The input information of the smart contract may include: the transfer-out account, the transfer-out amount, and the transaction fee (that is, the fee paid for executing the transaction). By transforming the contract transaction request of UTXO assets to the input message of Turing's complete smart contract, UTXO assets can call Turing's complete contract for asset transfer or more complex functions.

In an optional embodiment, the conversion module 202 is further configured to determine that the second account is the smart contract's account when the blockchain node receives a transaction request for the Account asset from the second account. The account is transferred out, and the input amount in the transaction request is determined as the transfer amount in the input information, and the input handling fee in the transaction request is determined as the transaction handling fee in the input information.

The calling module 203 is configured to call a target smart contract instruction corresponding to the input information through a virtual machine to execute the transaction.

In an optional embodiment, before the denomination of the UTXO asset corresponding to the income amount carried in the contract transaction request is split into the transfer-out amount and the transaction fee, the smart contract processing device 20 Also includes:

The judgment module 204 is configured to judge whether the sum of the transfer amount and the transaction fee is greater than the remaining face value in the UTXO asset;

The calculation module 205 is configured to calculate the sum of the transfer amount and the transaction fee and the sum of the transfer amount and the transaction fee when the sum of the transfer amount and the transaction fee is less than the remaining face value in the UTXO asset The difference between the remaining face value of UTXO assets;

The calculation module 205 is further configured to convert the amount corresponding to the difference in the Account asset into the UTXO asset.

The update module 206 is configured to update the UTXO asset status of the first account according to the contract status returned by the virtual machine.

In an optional embodiment, the judging module 204 is further used to judge whether the transaction fee is greater than the fee required to execute the transaction;

The calling module 203 is further configured to execute the transaction through the virtual machine when the determining module 204 determines that the transaction fee is greater than or equal to the fee required to execute the transaction;

The calling module 203 is further configured to terminate the execution of the transaction by the virtual machine when the determination module 204 determines that the transaction fee is less than the transaction fee required to execute the transaction.

In an optional embodiment, after the transaction request is executed, the smart contract processing device 20 further includes:

The first refund module 207 is used to return the excess handling fee to the first account.

The first refund module 207 is further configured to create a new UTXO based on the excess handling fee and return it to the first account.

In an optional embodiment, when the blockchain node receives a transaction request for the Account asset from the second account and after the transaction request is executed, the smart contract processing device 20 further includes:

The second refund module 208 is configured to return the excess handling fee to the second account or the first account.

The smart contract processing device of this embodiment converts the UTXO assets to be traded into the input information of the smart contract to be called by the exchange; and then calls the target smart contract instruction corresponding to the input information through the virtual machine to execute the Transaction; Finally, the UTXO asset status of the first account is updated according to the contract status returned by the virtual machine. This allows UTXO assets to call Turing's complete contract for asset transfer or more complex functions.

Example three

FIG. 3 is a schematic diagram of the internal structure of a computer device disclosed in an embodiment of the present invention.

In this embodiment, the computer device 3 may be a client, a resource server, or other electronic devices.

The computer device 3 may include a memory 31, a processor 32, and a bus 33.

The memory 31 includes at least one type of readable storage medium, and the readable storage medium includes flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), magnetic memory, magnetic disk, optical disk, etc. The memory 31 may be an internal storage unit of the computer device 3 in some embodiments, such as a hard disk of the computer device 3. In other embodiments, the memory 31 may also be an external storage device of the computer device 3, for example, a plug-in hard disk equipped on the computer device 3, a smart memory card (Smart Media Card, SMC), and a secure digital (Secure Digital). Digital, SD) card, flash card (Flash Card), etc. Further, the memory 31 may also include both an internal storage unit of the computer device 3 and an external storage device. The memory 31 can be used not only to store application programs and various data installed in the computer device 3, such as download programs of the smart contract processing device 20 and various modules, but also to temporarily store data that has been output or will be output. .

Specifically, the memory 31 stores a plurality of modules that can be run by the processor 32, for example, a conversion module, which is used when the blockchain node receives a transaction request for UTXO assets from the first account, and the transaction will be performed. The UTXO asset is converted into the input information of the smart contract to be called by the exchange; the calling module is used to call the target smart contract instruction corresponding to the input information through the virtual machine to execute the transaction; the update module is used to execute the transaction according to the virtual The contract status returned by the machine updates the UTXO asset status of the first account.

The processor 32 may be a central processing unit (CPU), controller, microcontroller, microprocessor, or other data processing chip in some embodiments, and is used to run the download program or processing stored in the memory 31 data.

Specifically, the processor 32 implements the following method when executing the download program stored in the memory 31: when the blockchain node receives a transaction request for UTXO assets from the first account, convert the UTXO assets to be traded It is the input information of the smart contract to be called by the exchange; the target smart contract instruction corresponding to the input information is called through the virtual machine to execute the transaction; the UTXO asset of the first account is updated according to the contract status returned by the virtual machine status.

The bus 33 may be a peripheral component interconnect standard (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in FIG. 3 to represent, but it does not mean that there is only one bus or one type of bus.

Further, the computer device 3 may also include a network interface. The network interface may optionally include a wired interface and/or a wireless interface (such as a WI-FI interface, a Bluetooth interface, etc.), which is usually used to connect the computer device 3 with other Establish a communication connection between computer devices.

Optionally, the computer device 3 may also include a user interface. The user interface may include a display (Display) and an input unit such as a keyboard (Keyboard). The optional user interface may also include a standard wired interface and a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch liquid crystal display, an organic light-emitting diode (OLED) touch device, and the like. Wherein, the display can also be called a display screen or a display unit as appropriate, and is used to display messages processed in the computer device and to display a visualized user interface.

FIG. 3 only shows the computer device 3 with components 31-33. Those skilled in the art can understand that the structure shown in FIG. 3 does not constitute a limitation on the computer device 3, and may be a bus type The structure may also be a star structure, and the computer device 3 may also include fewer or more components than shown in the figure, or a combination of certain components, or a different component arrangement. If other existing or future electronic products can be adapted to the present invention, they should also be included in the protection scope of the present invention and included here by reference.

In the above embodiments, it may be implemented in whole or in part by application programs, hardware, firmware, or any combination thereof. When implemented using an application program, it can be implemented in the form of a computer program product in whole or in part.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website site, computer, server or data center via wired (for example, coaxial cable, optical fiber, digital subscriber line) or wireless (for example, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or application program functional unit.

If the integrated unit is implemented in the form of an application functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of an application product, and the computer application product is stored in a storage The medium includes a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, hard disk, read-only memory (Read-Only Memory, ROM), magnetic disk or optical disk and other media that can store download programs.

It should be noted that the serial numbers of the above-mentioned embodiments of the present invention are only for description, and do not represent the superiority of the embodiments. And the terms "include", "include" or any other variations thereof in this article are intended to cover non-exclusive inclusion, so that a process, article or method including a series of elements not only includes those elements, but also includes those that are not explicitly listed The other elements of, or also include elements inherent to this process, article or method. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, article or method that includes the element.

The above are only the preferred embodiments of the present invention, and do not limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technical fields , The same reason is included in the scope of patent protection of the present invention.

Claims

A smart contract processing method, characterized in that the method includes:

When the blockchain node receives the UTXO asset transaction request from the first account, it converts the UTXO asset to be traded into the input information of the smart contract to be called by the exchange;

Calling the target smart contract instruction corresponding to the input information through a virtual machine to execute the transaction;

Update the state of the UTXO asset of the first account according to the contract state returned by the virtual machine.
The method of claim 1, wherein the method further comprises:

Compile smart contracts written in Turing complete language to generate smart contract instructions;

The smart contract is deployed according to the smart contract instruction and the initial contract state.
The method according to claim 1 or 2, characterized in that, when the blockchain node receives a transaction request for UTXO assets from the first account, the UTXO assets to be traded are converted into those to be called by the exchange. The input information of the smart contract includes:

Determining the first account as the transfer-out account in the input information;

Determining the input amount in the transaction request as the transfer-out amount in the input information;

The input handling fee in the transaction request is determined as the transaction handling fee in the input information.
The method according to claim 3, characterized in that, before the invoking the target smart contract instruction corresponding to the input information through the virtual machine to execute the transaction, the method further comprises:

Determine whether the sum of the transfer amount and the transaction fee is greater than the remaining face value in the UTXO asset;

When the sum of the transfer-out amount and the transaction fee is less than the remaining face value in the UTXO asset, calculate the sum of the transfer-out amount and the transaction fee and the remaining face value in the UTXO asset The difference;

Convert the amount corresponding to the difference in the Account asset into the UTXO asset.
The method according to claim 4, wherein the method further comprises:

Determine whether the transaction fee is greater than the fee required to execute the transaction;

When the transaction fee is greater than or equal to the fee required to execute the transaction, execute the transaction through the virtual machine;

When the transaction fee is less than the fee required for executing the transaction, terminate the virtual machine to execute the transaction.
The method according to claim 5, wherein the handover fee required to execute the transaction is determined in the following manner:

Invoking the target smart contract instruction according to the input amount through the virtual machine;

The handling fee generated by calling the target smart contract instruction to execute the transaction determines the handling fee required for executing the transaction;

Shows the fee required to execute the transaction.
The method according to claim 5 or 6, characterized in that, after the transaction request is executed, the method further comprises:

Return the excess handling fee to the first account; or,

Create a new UTXO based on the excess handling fee and return it to the first account.
A smart contract processing device, characterized in that the device includes:

The conversion module is used to convert the UTXO asset to be traded into the input information of the smart contract to be called by the exchange when the blockchain node receives the transaction request of the UTXO asset from the first account;

The calling module is used to call the target smart contract instruction corresponding to the input information through a virtual machine to execute the transaction;

The update module is used to update the UTXO asset status of the first account according to the contract status returned by the virtual machine.
A computer device, characterized in that the computer device includes a memory and a processor, the memory stores a download program for smart contract processing that can run on the processor, and the download program for smart contract processing is When the processor is executed, the smart contract processing method according to any one of claims 1 to 7 is realized.
A computer-readable storage medium, wherein a download program for smart contract processing is stored on the computer-readable storage medium, and the download program for smart contract processing can be executed by one or more processors to achieve The smart contract processing method described in any one of 1 to 7 is required.