WO2020224235A1

WO2020224235A1 - Cross-chain transaction method and apparatus, device, and storage medium

Info

Publication number: WO2020224235A1
Application number: PCT/CN2019/120569
Authority: WO
Inventors: 褚镇飞; 张伟; 李文强; 张玉坚
Original assignee: 深圳壹账通智能科技有限公司
Priority date: 2019-05-06
Filing date: 2019-11-25
Publication date: 2020-11-12
Also published as: CN110232094A

Abstract

The present application relates to blockchain technology, and discloses a cross-chain transaction method and apparatus, a device, and a storage medium. The method comprises: when a cross-chain transaction is performed between various nodes of multiple chains, receiving transaction information of the current transaction sent by a client and a locking request of the client for corresponding associated data based on the transaction information, and locking, on the basis of the locking request, the corresponding associated data of the current transaction on the current node; executing a smart contract on the basis of the transaction information and the associated data, and after completion of the current transaction, pushing a completion message of the current transaction to the client; and after the client has respectively received the completion messages of the various nodes of the multiple chains and has respectively sent an unlocking request to the various nodes of the multiple chains, receiving the unlocking request, and unlocking, on the basis of the unlocking request, the corresponding associated data of the current transaction on the current node. The present application achieves safe and effective cross-chain transaction.

Description

Method, device, equipment and storage medium for cross-chain transaction

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on May 6, 2019, with the application number 201910370448.5, and the invention title "apparatus, method and storage medium for cross-chain transactions", the entire content of which is incorporated by reference Applying.

Technical field

This application relates to the field of blockchain technology, in particular to methods, devices, equipment and storage media for cross-chain transactions.

Background technique

Blockchain is a distributed ledger, and its essence is also a distributed database. A blockchain is an independent ledger, and two different chains are two different independent ledger. Cross-chain technology is a technology for collaborative operation of transactions between multiple distributed ledgers in the blockchain. For cross-chain transactions, generally speaking, for security considerations, institutional nodes will carry out security protection in many aspects to ensure the security of cross-chain transactions. However, the inventor realizes that in a cross-chain transaction, data may be used by multiple chains at the same time. For example, the data is modified by other users during the transaction, resulting in inconsistencies before and after the transaction, and the transaction fails. In view of this, providing a safe and effective transaction method in cross-chain transactions has become a problem to be solved.

Summary of the invention

The purpose of this application is to provide a method, device, equipment and storage medium for cross-chain transactions, aiming to realize safe and effective cross-chain transactions.

In order to achieve the above objective, the first aspect of this application provides a cross-chain transaction method, including: S1, when a cross-chain transaction is performed between each node of a multi-chain, the receiving client sends the transaction information of this transaction and the client The terminal locks the corresponding related data lock request based on the transaction information, and locks the related data corresponding to this transaction on the node based on the lock request; S2, executes the smart contract based on the transaction information and the related data, and completes this time After the transaction, the transaction completion message is pushed to the client; S3, when the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, Based on the unlock request, the associated data corresponding to the transaction on the current node is unlocked.

The second aspect of this application provides a cross-chain transaction device, including: a locking module, used for cross-chain transactions between nodes in a multi-chain, the receiving client sends the transaction information of this transaction and the client is based on The transaction information locks the corresponding associated data request, and locks the associated data corresponding to the transaction on the node based on the lock request; the push module is used to execute the smart contract based on the transaction information and the associated data, and complete the transaction After the transaction, the completion message of this transaction is pushed to the client; the unlocking module is used to receive the completion message of each node of the multi-chain and send the unlock request to each node of the multi-chain. The unlocking request unlocks the associated data corresponding to the transaction on the current node based on the unlocking request.

A third aspect of the present application provides a cross-chain transaction device, including: a memory and at least one processor, the memory stores instructions, and the memory and the at least one processor are interconnected by wires; the at least one The processor invokes the instructions in the memory, so that the cross-chain transaction device executes the method described in the first aspect.

The fourth aspect of the present application provides a computer-readable storage medium, the computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer executes the above-mentioned first aspect method.

In this application, when a cross-chain transaction is performed between each node of the multi-chain, the node locks the associated data corresponding to the transaction on the node when receiving the transaction, and pushes the completion message of the transaction to The client, after receiving the completion message of each node of the multi-chain, the client sends an unlock request to each node to unlock the associated data corresponding to the transaction on the node. This application locks the data during cross-chain transactions And unlock the data after the transaction is completed, which can realize safe and effective cross-chain transactions.

Description of the drawings

FIG. 1 is a schematic diagram of an optional application environment of each embodiment of this application;

FIG. 2 is a schematic diagram of the hardware architecture of an embodiment of the cross-chain transaction device of this application;

FIG. 3 is a program module diagram of an embodiment of the processing system in FIG. 2;

FIG. 4 is a schematic flowchart of an embodiment of a method for applying a cross-chain transaction.

Detailed ways

The embodiments of the present application provide a method, device, equipment and storage medium for cross-chain transactions, aiming to realize safe and effective cross-chain transactions.

In order to enable those skilled in the art to better understand the solutions of the present application, the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order 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" or "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device including a series of steps or units is not necessarily limited to those clearly listed Steps or units, but may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

For ease of understanding, the following describes the specific process of the embodiment of the present application. Refer to FIG. 1, which is a schematic diagram of the application environment of the preferred embodiment of the present application. In this embodiment, the multiple chains include blockchain 1, blockchain 2, and blockchain 3. The client sends transactions to multiple blockchains to perform cross-chain transactions among the nodes of the multiple chains. The cross-chain transaction device is the device where the node executing the transaction in the blockchain is located.

A cross-chain transaction device is a device that can automatically perform numerical calculation and/or information processing in accordance with pre-set or stored instructions. The cross-chain transaction device can be a computer, a single network server, a server group composed of multiple network servers, or a cloud composed of a large number of hosts or network servers based on cloud computing, where cloud computing is one of distributed computing. A super virtual computer composed of a group of loosely coupled computer sets.

2 shows a schematic diagram of the hardware architecture of an embodiment of the cross-chain transaction device of this application. In this embodiment, the cross-chain transaction device 1 may include, but is not limited to, those that can communicate with each other through a system bus. The memory 11, the processor 12, and the network interface 13, and the memory 11 stores a processing system 10 that can run on the processor 12. It should be pointed out that Figure 2 only shows the device 1 for cross-chain transactions with components 11-13, but it should be understood that it is not required to implement all of the illustrated components, and more or less may be implemented instead. Components.

Among them, the memory 11 includes a memory and at least one type of readable storage medium. The memory provides a cache for the operation of the device 1 for cross-chain transactions; the readable storage medium can be, for example, flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), random access memory (RAM), static random access Non-volatile storage media such as memory (SRAM), read only memory (ROM), electrically erasable programmable read only memory (EEPROM), programmable read only memory (PROM), magnetic memory, magnetic disks, and optical disks. In some embodiments, the readable storage medium may be an internal storage unit of the device 1 for cross-chain transactions, such as the hard disk of the device 1 for cross-chain transactions; in other embodiments, the non-volatile storage medium may also be It is the external storage device of the device 1 for cross-chain transactions, such as plug-in hard disks, Smart Media Card (SMC), Secure Digital (SD) cards, flash memory cards equipped on the device 1 for cross-chain transactions (Flash Card) etc. In this embodiment, the readable storage medium of the memory 11 is generally used to store the operating system and various application software installed in the cross-chain transaction device 1, for example, to store the program code of the processing system 10 in an embodiment of the present application. In addition, the memory 11 can also be used to temporarily store various types of data that have been output or will be output.

The processor 12 may be a central processing unit (Central Processing Unit, CPU), controller, microcontroller, microprocessor, or other data processing chip in some embodiments, and is used to run data stored in the memory 11 Program code or processing data, such as running the processing system 10, etc.

The network interface 13 may include a standard wireless network interface and a wired network interface. The network interface 13 is generally used to establish a communication connection between the cross-chain transaction device 1 and other electronic devices.

The processing system 10 is stored in the memory 11, and includes at least one computer-readable instruction stored in the memory 11, and the at least one computer-readable instruction can be executed by the processor 12 to implement the method of each embodiment of the present application; And, the at least one computer-readable instruction can be divided into different logic modules according to the different functions implemented by its parts.

In an embodiment, the above-mentioned processing system 10 implements the following steps when being executed by the processor 12:

When a cross-chain transaction is performed between various nodes of the multi-chain, the receiving client sends the transaction information of this transaction and the client's lock request for the corresponding associated data based on the transaction information, and based on the lock request, the current node is The related data corresponding to the transaction is locked;

Execute the smart contract based on the transaction information and related data, and push the completion message of the transaction to the client after completing the transaction;

When the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, and performs the associated data corresponding to this transaction on the node based on the unlock request. Unlock.

For specific principles, please refer to the following description of the program module diagram of the processing system 10 in FIG. 3 and the flowchart of the method in FIG. 4.

Referring to FIG. 3, it is a program module diagram of the processing system 10 in FIG. The processing system 10 is divided into multiple modules, and the multiple modules are stored in the memory 12 and executed by the processor 13 to complete the application. The module referred to in this application refers to a series of computer program instruction segments that can complete specific functions.

The processing system 10 can be divided into: a locking module 101, a pushing module 102, and an unlocking module 103.

The locking module 101 is used to receive the transaction information of this transaction sent by the client and the lock request of the client based on the transaction information for the corresponding associated data when performing cross-chain transactions between the various nodes of the multi-chain. The lock request locks the associated data corresponding to this transaction on the node;

Among them, related data is data that must be used in transactions, and different transactions have different related data. For example, institution A and institution B belong to different blockchains. For example, the transaction information of cross-chain transactions is: transfer 1 million from institution A to institution B, and the corresponding associated data is institution A’s account information on the blockchain, Account information of institution B on the blockchain. If the data on each chain is successfully locked, the transaction can be executed. The purpose of locking the associated data is to prevent other users from modifying the data, causing the transaction to fail.

The push module 102 is configured to execute a smart contract based on the transaction information and associated data, and push the completion message of the transaction to the client after the transaction is completed;

Among them, after the transaction is completed, the completion message of this transaction is actively pushed to the client terminal, so that the upper-level client terminal can learn the transaction result in time without constantly polling the node for the transaction result.

The unlocking module 103 is used for receiving the unlocking request after the client receives the completion message of each node of the multi-chain and sending an unlocking request to each node of the multi-chain respectively, and based on the unlocking request, the current node The associated data corresponding to this transaction is unlocked.

When the client receives the completion message of each node of the multi-chain, it analyzes whether it has received the completion message of all the nodes that execute the transaction to determine whether the transaction is successful, and if it is, it can send an unlock request to the multi-chain To unlock the associated data corresponding to this transaction on this node. In other embodiments, the node can unlock the associated data by itself after the transaction is completed.

As shown in FIG. 4, FIG. 4 is a schematic flowchart of an embodiment of a method for cross-chain transaction of this application. When the processor 13 of the device 1 for cross-chain transaction executes the processing system 10 stored in the memory 12, the following steps of the method are implemented:

Step S1, when a cross-chain transaction is performed between each node of the multi-chain, the receiving client sends the transaction information of this transaction and the client's lock request for the corresponding associated data based on the transaction information, and based on the lock request, the current node The related data corresponding to the previous transaction is locked;

Among them, the client sends the transaction information of this transaction to each node of the multi-chain for cross-chain transactions, and at the same time, the client sends a lock request of the transaction information to the corresponding associated data to each node of the multi-chain. Related data is the data that must be used in the transaction. Different transactions have different related data. For example, A and B belong to different blockchains. For example, the transaction information of a cross-chain transaction is: transfer 1 million from A to B Institution, the corresponding associated data is the account information of institution A on the blockchain and the account information of institution B on the blockchain.

Among them, if the associated data in the blockchain is not locked successfully, the cross-chain transaction fails and the transaction needs to be re-initiated. If the data on each chain is successfully locked, the transaction can be executed. The purpose of locking the associated data is to prevent other users from modifying the data, causing the transaction to fail.

Step S2, execute a smart contract based on the transaction information and associated data, and push the completion message of the transaction to the client after the transaction is completed;

Among them, each node of the multi-chain executes smart contracts based on the transaction information and associated data, executes the transaction submission after the transaction is completed, and writes the transaction information on the blockchain ledger. At the same time, after the transaction is completed, the transaction is completed The message is actively pushed to the client, so that the upper-level client can learn the transaction result in time without constantly polling the node for the transaction result.

Further, the client can obtain the transaction completion message through long polling, that is, after the client sends the transaction information of this transaction to the node, the connection is idle and waits, and the node immediately returns the completion message when the transaction is completed. Message to the client. This operation takes into account: when the push completion message is unstable and the transaction is lost, the transaction falls into an unknown state. Therefore, the message delivery mechanism can be used at the same time, that is, the client performs long polling while the node is pushing. .

Step S3: After the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, and based on the unlock request, the transaction corresponding to this node is Link data to unlock.

In one embodiment, on the basis of the above-mentioned embodiment, the step of locking the associated data corresponding to this transaction on the node based on the locking request specifically includes: locking the smart contract on a predetermined smart contract based on the locking request Write the associated data corresponding to this transaction on this node, and execute the lock smart contract to lock the associated data corresponding to this transaction on this node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request specifically includes: writing the associated data corresponding to the transaction on the node on the predetermined unlock smart contract based on the unlock request, and execute The unlocking smart contract unlocks the associated data corresponding to this transaction on the node.

Among them, the related data lock can be realized by a lock smart contract. For example, the transaction is: the user needs to modify data A, then the locked related data can be LOCK-A. When the lock smart contract is used to write LOCK-A on the blockchain successfully , It means that data A is locked successfully.

Among them, the associated data unlocking can be realized by unlocking the smart contract. For example, when data A needs to be unlocked, then the unlocking associated data can be LOCK-A. When the unlocking smart contract is used to write LOCK-A on the blockchain successfully, Indicates that data A is successfully unlocked.

In one embodiment, on the basis of the foregoing embodiment, the step of locking the associated data corresponding to this transaction on the current node based on the lock request includes: writing on a predetermined lock smart contract based on the lock request Enter the associated data and the first identity information corresponding to this transaction on this node, and execute the lock smart contract to lock the associated data corresponding to this transaction on this node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request further includes: writing the associated data and the second transaction corresponding to the transaction on the node on the predetermined unlocking smart contract based on the unlock request. 2. Identity information, execute the unlocking smart contract, and when the second identity information is the same as the first identity information, the associated data corresponding to the transaction on the current node is unlocked.

Among them, the second identity information and the first identity information can be the digital certificate of the user (organization), the associated data and the digital certificate of the institution are written on the locked smart contract, and the associated data and the digital certificate of the institution are written on the unlocked smart contract. When unlocking, if only two digital certificates are consistent, the identity verification is passed, and the unlocking operation can be performed. Write the identity information in the lock smart contract and unlock the smart contract separately. The purpose is to prevent other users from maliciously unlocking the data (that is, when there is already a user locked data, forcibly unlocking to use the data) and interrupting the transaction, further improving the cross-border Security of chain transactions.

In one embodiment, on the basis of the foregoing embodiment, the step of locking the associated data corresponding to this transaction on the current node based on the lock request includes: writing on a predetermined lock smart contract based on the lock request Enter the associated data and lock duration corresponding to this transaction on this node, and execute the lock smart contract to lock the associated data corresponding to this transaction on this node;

The cross-chain transaction method further includes: when the unlock request is not received after pushing the completion message of the transaction to the client, if the time difference between the current moment and the moment when the associated data is locked is greater than or equal to the lock duration, the current The associated data corresponding to this transaction on the node is unlocked.

Among them, in order to prevent a user from locking the data for a long time or not unlocking the data for a long time after completing a cross-chain transaction (for example, the client program has an abnormal downtime and cannot continue to execute normal logic to unlock), so that the locked data cannot be used by other users In this embodiment, the associated data and the lock duration can be written on the locked smart contract. Of course, only when the transaction is completed, the analysis is performed on the relationship between the current time and the time when the associated data is locked and the lock duration. The data will be unlocked when it is greater than or equal to the lock duration.

In one embodiment, on the basis of the foregoing embodiment, the step of locking the associated data corresponding to this transaction on the current node based on the lock request includes: writing on a predetermined lock smart contract based on the lock request Enter the associated data and the number of blocks corresponding to this transaction on this node, and execute the lock smart contract to lock the associated data corresponding to this transaction on this node;

The cross-chain transaction method further includes: when the unlock request is not received after pushing the completion message of the transaction to the client, if the difference between the current block number and the block number at the moment when the associated data is locked is greater than or equal to When the number of blocks is reached, the associated data corresponding to the transaction on this node will be unlocked.

This embodiment considers that the node time on the blockchain is often not uniform (each node runs on a separate server, and the time of each server is not completely the same, there may be a difference of several seconds or minutes), so it can Use the number of blocks to replace the lock duration mentioned above. For example, if the number of blocks is 10, the valid duration of the locked data is 10 blocks. Assuming that the current block number is 100, other users will The data cannot be unlocked unless the user actively releases it. After the block number reaches 110, it will be automatically unlocked.

Compared with the prior art, in this application, when a cross-chain transaction is performed between each node in a multi-chain, the node locks the associated data corresponding to the transaction on the node when the transaction is received, and the transaction is completed after the transaction is completed. The completion message of the transaction is pushed to the client. After the client receives the completion message of each node of the multi-chain, it sends an unlock request to each node to unlock the associated data corresponding to the transaction on the node. Locking the data during cross-chain transactions and unlocking the data after the transaction is completed can realize safe and effective cross-chain transactions.

The present application also provides a cross-chain transaction device, including: a memory and at least one processor, the memory stores instructions, the memory and the at least one processor are interconnected by wires; the at least one processor calls The instructions in the memory enable the cross-chain transaction device to execute the steps in the above-mentioned cross-chain transaction method.

The present application also provides a computer-readable storage medium. The computer-readable storage medium may be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium. The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on the computer, the computer executes the following steps:

S1, when a cross-chain transaction is performed between each node of the multi-chain, the receiving client sends the transaction information of this transaction and the client's lock request for the corresponding associated data based on the transaction information, and based on the lock request, the current node The related data corresponding to this transaction is locked;

S2, execute the smart contract based on the transaction information and related data, and push the completion message of the transaction to the client after the transaction is completed;

S3: After the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, and associates the transaction corresponding to the current node on the node based on the unlock request. The data is unlocked.

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.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that: The technical solutions recorded in the embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A method of cross-chain transaction, the method of cross-chain transaction includes:

S1, when a cross-chain transaction is performed between each node of the multi-chain, the receiving client sends the transaction information of this transaction and the client's lock request for the corresponding associated data based on the transaction information, and based on the lock request, the current node The related data corresponding to this transaction is locked;

S2, execute the smart contract based on the transaction information and related data, and push the completion message of the transaction to the client after the transaction is completed;

S3: After the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, and associates the transaction corresponding to the current node on the node based on the unlock request. The data is unlocked.
The method for cross-chain transactions according to claim 1, wherein the step of locking the associated data corresponding to the transaction on the current node based on the locking request specifically includes:

Based on the lock request, write the associated data corresponding to the current transaction on the node in a predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the current transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request specifically includes:

Based on the unlock request, write the associated data corresponding to the current transaction on the current node in the predetermined unlock smart contract, and execute the unlock smart contract to unlock the associated data corresponding to the current transaction on the node.
The method for cross-chain transactions according to claim 1, wherein the step of locking the associated data corresponding to the transaction on the current node based on the locking request comprises:

Based on the lock request, write the associated data and first identity information corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request further includes: writing the associated data and the second transaction corresponding to the transaction on the node on the predetermined unlocking smart contract based on the unlock request. 2. Identity information, execute the unlocking smart contract, and when the second identity information is the same as the first identity information, the associated data corresponding to the transaction on the current node is unlocked.
The method for cross-chain transactions according to claim 1, wherein the step of locking the associated data corresponding to the transaction on the current node based on the locking request comprises:

Based on the lock request, write the associated data corresponding to the transaction on the node and the lock duration on the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The cross-chain transaction method further includes: when the unlock request is not received after pushing the completion message of the transaction to the client, if the time difference between the current moment and the moment when the associated data is locked is greater than or equal to the lock duration, the current The associated data corresponding to this transaction on the node is unlocked.
The method for cross-chain transactions according to claim 1, wherein the step of locking the associated data corresponding to the transaction on the current node based on the locking request comprises:

Based on the lock request, write the associated data and block number corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The cross-chain transaction method further includes: when the unlock request is not received after pushing the completion message of the transaction to the client, if the difference between the current block number and the block number at the moment when the associated data is locked is greater than or equal to When the number of blocks is reached, the associated data corresponding to the transaction on this node will be unlocked.
A device for cross-chain transactions. The device for cross-chain transactions includes a memory and a processor connected to the memory. The memory stores a processing system that can run on the processor. The processing system includes :

The lock module is used to receive the transaction information of this transaction sent by the client and the lock request of the corresponding associated data based on the transaction information when the cross-chain transaction is performed between the various nodes of the multi-chain, and based on the lock request, The associated data corresponding to this transaction on this node is locked;

The push module is used to execute the smart contract based on the transaction information and associated data, and push the completion message of the transaction to the client after the transaction is completed;

The unlocking module is used for receiving the unlocking request after the client receives the completion message of each node of the multi-chain and sending an unlocking request to each node of the multi-chain respectively, and based on the unlocking request, the current transaction on the node The corresponding associated data is unlocked.
According to the cross-chain transaction device according to claim 6, the locking module is specifically configured to:

Based on the lock request, write the associated data corresponding to the current transaction on the node in a predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the current transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request specifically includes:

Based on the unlock request, write the associated data corresponding to the current transaction on the current node in the predetermined unlock smart contract, and execute the unlock smart contract to unlock the associated data corresponding to the current transaction on the node.
According to the cross-chain transaction device according to claim 6, the locking module is specifically configured to:

Based on the lock request, write the associated data and first identity information corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request further includes:

Based on the unlock request, write the associated data and second identity information corresponding to this transaction on the node on the predetermined unlock smart contract, and execute the unlock smart contract. When the second identity information is the same as the first identity information At the same time, the associated data corresponding to this transaction on this node is unlocked.
According to the cross-chain transaction device according to claim 6, the locking module is specifically configured to:

Based on the lock request, write the associated data corresponding to the transaction on the node and the lock duration on the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The cross-chain transaction device is also specifically used to: when the unlock request is not received after pushing the completion message of this transaction to the client, if the time difference between the current moment and the moment when the associated data is locked is greater than or equal to the lock duration, Unlock the associated data corresponding to this transaction on this node.
According to the cross-chain transaction device according to claim 6, the locking module is specifically configured to:

Based on the lock request, write the associated data and block number corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The cross-chain transaction device is also specifically used for: when the unlock request is not received after pushing the completion message of this transaction to the client, if the difference between the current block number and the block number at the moment when the associated data is locked When the number of blocks is greater than or equal to the number of blocks, the associated data corresponding to the transaction on this node is unlocked.
A cross-chain transaction device, including a memory, a processor, and computer-readable instructions stored on the memory and capable of running on the processor. The processor implements the following steps when the processor executes the computer-readable instructions :

S1, when a cross-chain transaction is performed between each node of the multi-chain, the receiving client sends the transaction information of this transaction and the client's lock request for the corresponding associated data based on the transaction information, and based on the lock request, the current node The related data corresponding to this transaction is locked;

S2, execute the smart contract based on the transaction information and related data, and push the completion message of the transaction to the client after the transaction is completed;

S3: After the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, and associates the transaction corresponding to the current node on the node based on the unlock request. The data is unlocked.
According to the cross-chain transaction device of claim 11, when the processor executes the computer-readable instructions to implement the step of locking the associated data corresponding to the transaction on the current node based on the lock request, the step includes the following step:

Based on the lock request, write the associated data corresponding to the current transaction on the node in a predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the current transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request specifically includes:

Based on the unlock request, write the associated data corresponding to the current transaction on the current node in the predetermined unlock smart contract, and execute the unlock smart contract to unlock the associated data corresponding to the current transaction on the node.
According to the cross-chain transaction device of claim 11, when the processor executes the computer-readable instructions to implement the step of locking the associated data corresponding to the transaction on the current node based on the lock request, the step includes the following step:

Based on the lock request, write the associated data and first identity information corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request further includes: writing the associated data and the second transaction corresponding to the transaction on the node on the predetermined unlocking smart contract based on the unlock request. 2. Identity information, execute the unlocking smart contract, and when the second identity information is the same as the first identity information, the associated data corresponding to the transaction on the current node is unlocked.
According to the cross-chain transaction device of claim 11, when the processor executes the computer-readable instructions to implement the step of locking the associated data corresponding to the transaction on the current node based on the lock request, the step includes the following step:

Based on the lock request, write the associated data corresponding to the transaction on the node and the lock duration on the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

In the cross-chain transaction device, when the processor executes the computer-readable instructions to implement the step of locking the associated data corresponding to the transaction on the current node based on the lock request, it further includes the following step: When the completion message of the transaction is pushed to the client and the unlock request is not received, if the time difference between the current time and the time when the associated data is locked is greater than or equal to the lock duration, the associated data corresponding to the transaction on the current node is unlocked.
According to the cross-chain transaction device of claim 11, when the processor executes the computer-readable instructions to implement the step of locking the associated data corresponding to the transaction on the current node based on the lock request, the step includes the following step:

Based on the lock request, write the associated data and block number corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

In the cross-chain transaction device, when the processor executes the computer-readable instructions to implement the step of locking the associated data corresponding to the transaction on the current node based on the lock request, it further includes the following step: When the completion message of the transaction is pushed to the client and the unlock request is not received, if the difference between the current block number and the block number at the moment when the associated data is locked is greater than or equal to the number of blocks, the current transaction on this node The corresponding associated data is unlocked.
A computer-readable storage medium that stores computer instructions, and when the computer instructions are executed on a computer, the computer executes the following steps:

S1, when a cross-chain transaction is performed between each node of the multi-chain, the receiving client sends the transaction information of this transaction and the client's lock request for the corresponding associated data based on the transaction information, and based on the lock request, the node The related data corresponding to this transaction is locked;

S2, execute the smart contract based on the transaction information and related data, and push the completion message of the transaction to the client after the transaction is completed;

S3: After the client receives the completion message of each node of the multi-chain and sends an unlock request to each node of the multi-chain, it receives the unlock request, and associates the transaction corresponding to the current node on the node based on the unlock request. The data is unlocked.
The computer-readable storage medium according to claim 16, when the computer instruction executes the step of locking the associated data corresponding to this transaction on the node based on the lock request on the computer, the computer is caused to perform the following steps :

Based on the lock request, write the associated data corresponding to the current transaction on the node in a predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the current transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request specifically includes:

Based on the unlock request, write the associated data corresponding to the current transaction on the current node in the predetermined unlock smart contract, and execute the unlock smart contract to unlock the associated data corresponding to the current transaction on the node.
The computer-readable storage medium according to claim 16, when the computer instruction executes the step of locking the associated data corresponding to this transaction on the node based on the lock request on the computer, the computer is caused to perform the following steps :

Based on the lock request, write the associated data and first identity information corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The step of unlocking the associated data corresponding to the transaction on the current node based on the unlock request further includes: writing the associated data and the second transaction corresponding to the transaction on the node on the predetermined unlocking smart contract based on the unlock request. 2. Identity information, execute the unlocking smart contract, and when the second identity information is the same as the first identity information, the associated data corresponding to the transaction on the current node is unlocked.
The computer-readable storage medium according to claim 16, when the computer instruction executes the step of locking the associated data corresponding to this transaction on the node based on the lock request on the computer, the computer is caused to perform the following steps :

Based on the lock request, write the associated data corresponding to the transaction on the node and the lock duration on the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The computer-readable storage medium, when the computer instruction executes the step of locking the associated data corresponding to this transaction on the current node based on the lock request on the computer, it also causes the computer to perform the following steps: After the transaction completion message is pushed to the client and the unlock request is not received, if the time difference between the current time and the time when the associated data is locked is greater than or equal to the lock duration, the associated data corresponding to this transaction on the node is unlocked.
The computer-readable storage medium according to claim 16, when the computer instruction executes the step of locking the associated data corresponding to this transaction on the node based on the lock request on the computer, the computer is caused to perform the following steps :

Based on the lock request, write the associated data and block number corresponding to this transaction on the node in the predetermined lock smart contract, and execute the lock smart contract to lock the associated data corresponding to the transaction on the node;

The computer-readable storage medium, when the computer instruction executes the step of locking the associated data corresponding to this transaction on the current node based on the lock request on the computer, it also causes the computer to perform the following steps: When the transaction completion message is pushed to the client and the unlock request is not received, if the difference between the current block number and the block number at the time when the associated data is locked is greater than or equal to the number of blocks, the transaction on this node will be corresponded to The associated data is unlocked.