CN110751475A - Cross-chain method, system, equipment and storage medium for blockchain transaction - Google Patents

Abstract

The present invention provides a cross-chain method for blockchain transactions. The method includes: receiving first cross-chain transaction request information sent by a source chain, wherein the first cross-chain transaction request information includes transaction information of the first cross-chain transaction; verifying After the first cross-chain transaction is credible, determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain: if yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; if not, send the first cross-chain transaction to the destination chain. A cross-chain transaction is sent to the corresponding first cross-chain gateway for the first cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction. By setting up several cross-chain gateways, fast acquisition and response between relay chains and relay chains can be achieved. On the other hand, application chains with different verification rules can be implemented on each relay chain to conduct cross-chain transactions between contracts, so as to achieve It realizes cross-level and cross-chain transactions between true heterogeneous chains.

Description

A cross-chain method and system, device and storage medium for blockchain transactions

technical field

The present application relates to the technical field of blockchain communication, and in particular, to a cross-chain method and system, device and storage medium for blockchain transactions.

Background technique

At present, there are two main types of cross-layer blockchain cross-chain technology: hash locking mechanism and relay chain technology and relay chain two-layer network expansion technology. The operation between blockchains cannot be extended to the operation of general smart contracts, and although the cross-chain transaction of heterogeneous blockchains is realized, in essence, the bridging technology is used to convert each heterogeneous chain into a compliant relay chain. The isomorphic chain of verification rules; and the two-layer network expansion technology of the relay chain, the cross-level transmission of transactions may experience the jump of multiple relay chains, and the operation of the relay chain requires a series of operations such as consensus, and the speed is relatively slower and much less efficient.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a cross-chain method, system, device and storage medium for realizing a truly heterogeneous chain, cross-layer, cross-chain and high-efficiency blockchain transaction.

In a first aspect, the present invention provides a cross-chain method for blockchain transactions, the method is applicable to the first relay chain, and the method includes:

receiving the first cross-chain transaction request information sent by the source chain, wherein the first cross-chain transaction request information includes transaction information of the first cross-chain transaction;

After verifying that the first cross-chain transaction is credible, determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

If not, send the first cross-chain transaction to the corresponding first cross-chain gateway for the first cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; wherein ; The first cross-chain gateway stores the distributed routing table of cross-chain transactions, and based on the distributed cross-link routing table, cross-chain transactions can be efficiently routed and propagated across levels, and the destination chain is registered on the second relay chain.

Further, both the second relay chain and the first relay chain are recorded in the distributed routing table of the first cross-chain gateway; then the first cross-chain gateway can find the second relay chain to send the first cross-chain transaction To complete the first cross-chain transaction on the destination chain is:

Submit the first cross-chain transaction to the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction.

Further, the second relay chain and the first relay chain are recorded in the distributed routing tables of different cross-chain gateways; then the first cross-chain gateway can find the second relay chain to send the first cross-chain transaction to the destination The chain completes the first cross-chain transaction as follows: the first cross-chain gateway finds the second cross-chain gateway through the cross-chain gateway cluster for the second cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete The first cross-chain transaction; wherein, the information of the second relay chain is recorded in the second cross-chain gateway.

Further, the cross-chain gateway cluster is composed of various cross-chain gateways, and the communication and propagation of each cross-chain gateway is carried out in the form of P2P through the distributed routing table.

Further, for the second gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction includes:

The second gateway finds the second relay chain corresponding to the destination chain according to the recorded distributed routing table;

The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction proof:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

Otherwise, the first cross-chain transaction is not sent to the destination chain.

Among them, the cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information for each cross-chain gateway. And/or the second relay chain is used for verification.

The transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction proof, and custom fields.

In a second aspect, the present invention also provides a cross-chain method for blockchain transactions. The method is applicable to each cross-chain gateway, and each cross-chain gateway stores a distributed routing table for cross-chain transactions, based on the distributed cross-chain routing table. Methods for efficient cross-layer routing and propagation of cross-chain transactions include:

The first cross-chain gateway receives the first cross-chain transaction submitted by the first relay chain, wherein the first cross-chain transaction is sent by the source chain to the first relay chain;

Determine whether the relay chain information registered by the destination chain of the first cross-chain transaction is stored in the first cross-chain gateway:

Yes, submit the first cross-chain transaction to the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

No, the first cross-chain gateway finds the second cross-chain gateway through the cross-chain gateway cluster for the second cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; wherein , the information of the second relay chain is recorded in the second cross-chain gateway.

Further, for the second cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction includes:

The second gateway finds the second relay chain corresponding to the destination chain according to the recorded distributed routing table;

The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction proof:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

Otherwise, the first cross-chain transaction is not sent to the destination chain.

Among them, the cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information for each cross-chain gateway. And/or the second relay chain is used for verification.

The transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction proof, and custom fields.

Further, the gateway cluster is composed of various cross-chain gateways, and the communication and propagation of each cross-chain gateway is carried out in the form of P2P through the distributed routing table.

In a third aspect, the present invention also provides a cross-chain method for blockchain transactions, the method is applicable to the second relay chain, and the destination chain of the cross-chain transaction is registered on the second relay chain, and the method includes:

Receive the first cross-chain transaction submitted by the cross-chain gateway;

Send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; wherein, the cross-chain gateway stores the distributed routing table of the cross-chain transaction, and the cross-chain transaction can be efficiently cross-linked based on the distributed cross-chain routing table. Hierarchical routing and propagation, the destination chain is registered on the second relay chain.

Further, sending the first cross-chain transaction to the destination chain to complete the first cross-chain transaction includes:

The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction proof:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

Otherwise, the first cross-chain transaction is not sent to the destination chain.

Among them, the cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information for each cross-chain gateway. And/or the second relay chain is used for verification.

The transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction proof, and custom fields.

In a fourth aspect, the present invention also provides a blockchain cross-chain transaction system, including:

The source relay chain unit, the source relay chain unit includes an information receiving subunit and a transaction verification subunit, wherein; the information receiving subunit is configured to receive the first cross-chain transaction sent by the first relay chain; the transaction verification subunit is configured It is used to determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain after verifying that the first cross-chain transaction is credible:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; if not, send the first cross-chain transaction to the corresponding first cross-chain gateway.

Cross-chain gateway unit. The cross-chain gateway unit is composed of cross-chain gateways. The cross-chain gateway unit stores the distributed routing table of cross-chain transactions. Based on the distributed cross-link routing table, cross-chain transactions can be efficiently cross-level routing. and dissemination, the communication and dissemination of each cross-chain gateway is carried out in the form of P2P through the distributed routing table;

The destination relay chain unit, the destination chain of the cross-chain transaction is registered on the destination relay chain, and is used to receive the first cross-chain transaction submitted by the cross-chain gateway; and send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction. Transaction; the destination chain is registered on the second relay chain.

In a fifth aspect, the present invention also provides an apparatus comprising one or more processors and a memory, wherein the memory contains instructions executable by the one or more processors to cause the one or more processors to perform various functions according to the present invention. The cross-chain method for blockchain transactions provided by the embodiments.

In a sixth aspect, the present invention further provides a storage medium storing a computer program, and the computer program enables a computer to execute the cross-chain method for blockchain transactions provided according to various embodiments of the present invention.

Beneficial Effects of Invention

A cross-chain method, system, device and storage medium for blockchain transactions provided by various embodiments of the present invention realize fast acquisition and response between relay chains and relay chains by setting up several cross-chain gateways. , on each relay chain, application chains with different verification rules can perform cross-chain transactions between contracts, thus realizing cross-level and cross-chain transactions between true heterogeneous chains.

Description of drawings

Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

FIG. 1 is a flowchart of a cross-chain method for blockchain transactions according to an embodiment of the present invention.

FIG. 2 is a scene diagram of a cross-chain method for blockchain transactions provided by an embodiment of the present invention.

FIG. 3 is a flow chart of a preferred embodiment of the method shown in FIG. 1 .

FIG. 4 is a flow chart of another preferred embodiment of the method shown in FIG. 1 .

FIG. 5 is a flowchart of another cross-chain method for blockchain transactions provided in FIG. 5 .

FIG. 6 is a flowchart of another cross-chain method for blockchain transactions provided by the present invention.

FIG. 7 is a blockchain cross-chain transaction system provided by the present invention.

FIG. 8 is a schematic structural diagram of a device according to an embodiment of the present invention.

Detailed ways

The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for the convenience of description, only the parts related to the invention are shown in the drawings.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The first relay chain is the relay chain registered by the source chain in the sent cross-chain transaction, and the second relay chain is the relay chain registered by the destination chain in the cross-chain transaction. The source chain and destination chain can be registered on the same relay chain, or they can be registered on different relay chains.

FIG. 1 is a flowchart of a cross-chain method for blockchain transactions according to an embodiment of the present invention. As shown in Figure 1, in this embodiment, the present invention provides a cross-chain method for blockchain transactions, including:

In a first aspect, the present invention provides a cross-chain method for blockchain transactions, the method is applicable to the first relay chain, and the method includes:

S11. Receive first cross-chain transaction request information sent by the source chain, where the first cross-chain transaction request information includes transaction information of the first cross-chain transaction;

S12. After verifying that the first cross-chain transaction is credible, determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain:

S121: Yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

S121', No, send the first cross-chain transaction to the corresponding first cross-chain gateway so that the first cross-chain gateway can find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain Transactions; among them; the first cross-chain gateway stores the distributed routing table of cross-chain transactions, and based on the distributed cross-chain routing table, cross-level routing and propagation of cross-chain transactions can be performed efficiently, and the second relay chain registers destination chain.

Specifically, taking the scene diagram shown in FIG. 2 as an example, the first relay chain, that is, the relay chain A, sends the first cross-chain transaction request information, wherein the first cross-chain transaction request information includes the transaction of the first cross-chain transaction tx1 Information, such as the source chain ID1 of the first cross-chain transaction tx1, the destination chain ID2, transaction events and other information. Relay chain A verifies whether the first cross-chain request information is credible. If it is not credible, it rolls back tx1 and ends the cross-chain; Is chain ID2 also registered on relay chain A:

If so (as shown in Figure 2, the cross-chain transaction event is AppChain 1-AppChain 2), Relay Chain A directly submits the first cross-chain transaction tx1 to the destination chain, namely AppChain 2, and the cross-chain transaction is completed.

If not, relay chain A sends the first cross-chain transaction tx1 to cross-chain gateway 1 corresponding to relay chain A. After receiving the first cross-chain transaction tx1, cross-chain gateway 1 finds the second cross-chain transaction corresponding to the destination chain. Relay chain, and send tx1 to the second relay chain, the first cross-chain transaction of the second relay chain is sent to the destination chain, and the cross-chain transaction is completed. Among them, the cross-chain gateway 1 stores the distributed routing table of the cross-chain transaction, that is, stores the relevant information of the relay chain associated with it. Based on the distributed cross-chain routing table, the cross-chain transaction can be efficiently performed. Routing and propagation across hierarchies. The destination chain is registered on the second relay chain.

Preferably, the transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction certificate, and custom fields; the transaction information is provided by IBTP ( InterBlockchain Transfer Protocol) protocol for encapsulation. Preferably, the contents of the package structure are as follows:

From: source chain contract ID1

To: destination chain contract ID2

Index: Cross-chain transaction index

Timestamp: source chain block number

Payload: Cross-chain call content encoding

Proof: Cross-chain transaction proof

Extra: custom field

CID: calling contract ID3

Func: call a function

Args: arguments to call the function

Callback: callback function

Among them, Proof: cross-chain transaction proof. The Proof field stores the legality and existence proof information of cross-chain transactions, and provides specific verification information for the relay chain cross-chain verification engine. The content of the Proof field may vary according to the characteristics of the specific application chain. Specific verification rules and methods can be dynamically loaded into the cross-chain verification engine through flexible verification rules. Depending on the application chain, there may be different structures, and the main structure is determined by the script processing of the validation rules. For example, cross-chain transaction proof is mainly composed of transaction content hash and transaction hash signature. The content hash is the hash of the transaction content of the cross-chain transaction. Generally speaking, the transaction hash signature may be the signature of the endorsement node in the application chain of the transaction content hash.

In more embodiments, when relay chain A verifies whether the first cross-chain request information is credible, the following methods may be used: after the verification engine in relay chain A receives the first cross-chain transaction request information m1, it parses and obtains the first cross-chain transaction request information m1. A transaction information of a cross-chain transaction tx1; then the verification engine matches the verification rule R1 recorded in the verification engine according to the source chain ID1 in the acquired transaction information. Finally, run the program according to the verification rule R1 and the obtained cross-chain transaction proof proof to verify whether the first cross-chain transaction tx1 complies with the verification rule R1. If yes, it proves that the first cross-chain transaction is indeed from AppChain 1. That is, the first cross-chain transaction is credible.

FIG. 3 is a flow chart of a preferred embodiment of the method shown in FIG. 1 . As shown in FIG. 3 , in this embodiment, the second relay chain and the first relay chain are both recorded in the distributed routing table of the first cross-chain gateway; The follower chain sends the first cross-chain transaction to the destination chain to complete the first cross-chain transaction:

S121'1. Submit the first cross-chain transaction to the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction.

Specifically, still taking the scene diagram shown in Figure 2 as an example, if the first cross-chain transaction event is Application Chain 1 - Application Chain 3, as shown in Figure 2, the second relay where the destination chain (ie Application Chain 3) is located The chain (relay chain B in Figure 2) and the first relay chain (i.e. relay chain A in Figure 2) where the source chain (i.e. application chain 1) is located are recorded in the distributed routing table of the same cross-chain gateway 1 In this case, when the cross-chain gateway 1 receives the first cross-chain transaction tx1 sent by the relay chain A, the cross-chain gateway 1 submits the first cross-chain transaction tx1 to the relay chain B, and the relay chain B finds the corresponding application chain 3 according to the transaction information, and sends the first cross-chain transaction tx1, and the cross-chain transaction is completed.

FIG. 4 is a flow chart of another preferred embodiment of the method shown in FIG. 1 . As shown in FIG. 4 , in this embodiment, the second relay chain and the first relay chain are recorded in the distributed routing tables of different cross-chain gateways; then the first cross-chain gateway can find the second relay chain To complete the first cross-chain transaction by sending the first cross-chain transaction to the destination chain:

S121'1', the first cross-chain gateway finds the second cross-chain gateway through the cross-chain gateway cluster for the second cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain Transaction; wherein, the information of the second relay chain is recorded in the second cross-chain gateway.

Specifically, still taking the scene diagram shown in Figure 2 as an example, for example, the first cross-chain transaction event is Application Chain 1 - Application Chain 4, as shown in Figure 2, the second relay where the destination chain (ie Application Chain 4) is located The chain (relay chain C in Figure 2) and the first relay chain (i.e. relay chain A in Figure 2) where the source chain (i.e. application chain 1) is located are recorded in the distributed routing tables of different cross-chain gateways, That is, relay chain A is recorded in cross-chain gateway 1, and relay chain C is recorded in cross-chain gateway 2; in this case, when cross-chain gateway 1 receives the first cross-chain transaction tx1 sent by relay chain A , the cross-chain gateway 1 sends a request to find the relay chain C in the cross-chain gateway cluster. At this time, the cross-chain gateway 2 with the relay chain C sends a response, and the cross-chain gateway 1 sends the first cross-chain transaction to the cross-chain. Gateway 2, the cross-chain gateway 2 sends the first cross-chain transaction to the relay chain C and finally to the application chain 4, thereby completing the cross-chain transaction. Among them, the cross-chain gateway cluster is composed of various cross-chain gateways, and the communication and propagation of each cross-chain gateway is carried out in the form of P2P through the distributed routing table.

In more embodiments, the step S121'1' described in step S121'1' for the second gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction includes:

The second gateway finds the second relay chain corresponding to the destination chain according to the recorded distributed routing table;

The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction proof:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

Otherwise, the first cross-chain transaction is not sent to the destination chain.

Among them, the cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information for each cross-chain gateway. And/or the second relay chain is used for verification.

Specifically, in order to ensure the security of the transaction received by the destination chain, the second relay node can verify the first cross-chain transaction sent by the second gateway, because when the first relay chain sends the first cross-chain transaction It is necessary to endorse the reliability, legality and authenticity of the first cross-chain transaction, then the second relay chain can verify whether the endorsement information made by the first relay chain is credible during verification. If the transaction is credible, the second relay chain will send the first cross-chain transaction to the destination chain to complete the cross-chain transaction.

FIG. 5 is a flowchart of another cross-chain method for blockchain transactions provided by the present invention. As shown in Figure 5, in this embodiment, a cross-chain method for blockchain transactions is applied to each cross-chain gateway, and each cross-chain gateway stores a distributed routing table for cross-chain transactions. The cross-link routing table can perform efficient cross-layer routing and propagation methods for cross-chain transactions, including:

S21. The first cross-chain gateway receives the first cross-chain transaction submitted by the first relay chain, wherein the first cross-chain transaction is sent by the source chain to the first relay chain;

S22. Determine whether the relay chain information registered by the destination chain of the first cross-chain transaction is stored in the first cross-chain gateway:

S221, yes, submit the first cross-chain transaction to the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

S221', No, the first cross-chain gateway finds the second cross-chain gateway through the cross-chain gateway cluster, so that the second cross-chain gateway can find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain Transaction; wherein, the information of the second relay chain is recorded in the second cross-chain gateway.

Specifically, the execution principle of the method shown in FIG. 5 is the same as the execution principle of the method shown in FIG. 3 and FIG. 4 , and details are not repeated here.

In more embodiments, in step S221': for the second cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction includes:

The second gateway finds the second relay chain corresponding to the destination chain according to the recorded distributed routing table;

The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction proof:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

Otherwise, the first cross-chain transaction is not sent to the destination chain.

Among them, the cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information for each cross-chain gateway. And/or the second relay chain is used for verification.

Specifically, in order to ensure the security of the transaction received by the destination chain, the second relay node can verify the first cross-chain transaction sent by the second gateway, because when the first relay chain sends the first cross-chain transaction It is necessary to endorse the reliability, legality and authenticity of the first cross-chain transaction, then the second relay chain can verify whether the endorsement information made by the first relay chain is credible during verification. If the transaction is credible, the second relay chain will send the first cross-chain transaction to the destination chain and complete the cross-chain transaction. Otherwise, the first cross-chain transaction will not be sent to the destination chain.

FIG. 6 is a flowchart of another cross-chain method for blockchain transactions provided by the present invention. As shown in FIG. 6 , in this embodiment, a cross-chain method for blockchain transactions is applied to the second relay chain, and the destination chain of the cross-chain transaction is registered on the second relay chain. include:

S31. Receive the first cross-chain transaction submitted by the cross-chain gateway;

S32. Send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; wherein, the cross-chain gateway stores a distributed routing table of the cross-chain transaction, and the cross-chain transaction can be efficiently performed based on the distributed cross-chain routing table The cross-layer routing and propagation, the destination chain is registered on the second relay chain.

Specifically, the execution principle of the method shown in FIG. 6 is similar to the execution principle of the method shown in FIG. 1 , FIG. 3 , and FIG. 4 , except that the application scenario in this embodiment is that the source chain and the destination chain are no longer the same relay chain Register on.

FIG. 7 is a blockchain cross-chain transaction system provided by the present invention. As shown in Figure 7, in this embodiment, a blockchain cross-chain transaction system 7 includes:

The source relay chain unit 71, the source relay chain unit includes an information receiving subunit 711 and a transaction verification subunit 712, wherein; the information receiving subunit 711 is configured to receive the first cross-chain transaction sent by the first relay chain; the transaction The verification subunit 712 is configured to determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain after verifying that the first cross-chain transaction is credible:

If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction;

If not, send the first cross-chain transaction to the corresponding first cross-chain gateway.

The cross-chain gateway unit 72. The cross-chain gateway unit is composed of various cross-chain gateways. The cross-chain gateway unit stores the distributed routing table of the cross-chain transaction. Based on the distributed cross-link routing table, the cross-chain transaction can be efficiently cross-level. Routing and dissemination, the communication and dissemination of each cross-chain gateway is carried out in the form of P2P through the distributed routing table;

The destination relay chain unit 73, the destination chain of the cross-chain transaction is registered on the destination relay chain, and is used to receive the first cross-chain transaction submitted by the cross-chain gateway; and send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction. chain transaction; the destination chain is registered on the second relay chain.

FIG. 8 is a schematic structural diagram of a device according to an embodiment of the present invention.

As shown in FIG. 8 , as another aspect, the present application also provides a device 800 , comprising one or more central processing units (CPUs) 801 , which can operate according to a program stored in a read only memory (ROM) 802 or Various appropriate actions and processes are executed from the program loaded into the random access memory (RAM) 803 from the storage section 808 . In the RAM 803, various programs and data necessary for the operation of the device 800 are also stored. The CPU 801 , the ROM 802 , and the RAM 803 are connected to each other through a bus 804 . An input/output (I/O) interface 805 is also connected to bus 804 .

The following components are connected to the I/O interface 805: an input section 806 including a keyboard, a mouse, etc.; an output section 807 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 808 including a hard disk, etc. ; and a communication section 809 including a network interface card such as a LAN card, a modem, and the like. The communication section 809 performs communication processing via a network such as the Internet. A drive 810 is also connected to the I/O interface 805 as needed. A removable medium 811, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is mounted on the drive 810 as needed so that a computer program read therefrom is installed into the storage section 808 as needed.

In particular, according to the embodiments of the present disclosure, the cross-chain method for blockchain transactions described in any of the above embodiments can be implemented as a computer software program. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program containing program code for a cross-chain method for performing blockchain transactions. In such an embodiment, the computer program may be downloaded and installed from the network via the communication portion 809, and/or installed from the removable medium 811.

As yet another aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium may be a computer-readable storage medium included in the apparatus of the foregoing embodiment; A computer-readable storage medium in a device. The computer-readable storage medium stores one or more programs that are used by one or more processors to execute the cross-chain method of blockchain transactions described in this application.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more logical functions for implementing the specified functions executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by dedicated hardware-based systems that perform the specified functions or operations , or can be implemented by a combination of dedicated hardware and computer instructions.

The units or modules involved in the embodiments of the present application may be implemented in a software manner, and may also be implemented in a hardware manner. The described units or modules may also be provided in the processor, for example, each of the units may be a software program provided in a computer or a mobile smart device, or may be a separately configured hardware device. Wherein, the names of these units or modules do not constitute limitations on the units or modules themselves under certain circumstances.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principles. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, and should also cover, without departing from the concept of the present application, the above-mentioned technical features or Other technical solutions formed by any combination of its equivalent features. For example, a technical solution is formed by replacing the above-mentioned features with the technical features disclosed in this application (but not limited to) with similar functions.

Claims (13)

1. A cross-chain method for blockchain transactions, wherein the method is applicable to a first relay chain, and the method comprises: receiving the first cross-chain transaction request information sent by the source chain, wherein the first cross-chain transaction request information includes transaction information of the first cross-chain transaction; After verifying that the first cross-chain transaction is credible, determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain: If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; No, send the first cross-chain transaction to the corresponding first cross-chain gateway so that the first cross-chain gateway can find the second relay chain to send the first cross-chain transaction to the destination chain Completing the first cross-chain transaction; wherein; the first cross-chain gateway stores a distributed routing table of the cross-chain transaction, and based on the distributed cross-chain routing table, the cross-chain transaction can be efficiently routed across levels and propagation, the destination chain is registered on the second relay chain. 2. The method according to claim 1, wherein the second relay chain and the first relay chain are both recorded in the distributed routing table of the first cross-chain gateway; then the For the first cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction: Submitting the first cross-chain transaction to the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction. 3. The method according to claim 1, wherein the second relay chain and the first relay chain are recorded in distributed routing tables of different cross-chain gateways; The first cross-chain gateway finds the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction: The first cross-chain gateway finds the second cross-chain gateway through the cross-chain gateway cluster, so that the second cross-chain gateway can find the second relay chain to send the first cross-chain transaction to the destination chain for completion. The first cross-chain transaction; wherein, the information of the second relay chain is recorded in the second cross-chain gateway. 4 . The method according to claim 3 , wherein the cross-chain gateway cluster is composed of cross-chain gateways, and the communication and propagation of each cross-chain gateway is performed in a P2P form through the distributed routing table. 5 . 5. The method according to claim 3 or 4, wherein the second relay chain is used for the second gateway to find a second relay chain to send the first cross-chain transaction to the destination chain to complete the The first cross-chain transaction includes: The second gateway finds the second relay chain corresponding to the destination chain according to the recorded distributed routing table; The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction certificate: If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; Otherwise, the first cross-chain transaction is not sent to the destination chain. The cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information It is used for verification by each cross-chain gateway and/or the second relay chain. The transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction proof, and custom fields. 6. A cross-chain method for blockchain transactions, characterized in that the method is applicable to each cross-chain gateway, and each of the cross-chain gateways stores a distributed routing table for cross-chain transactions, based on the distributed cross-chain gateways. The link routing table can efficiently route and propagate cross-chain transactions across layers. The method includes: The first cross-chain gateway receives the first cross-chain transaction submitted by the first relay chain, wherein the first cross-chain transaction is sent by the source chain to the first relay chain; Determine whether the relay chain information registered by the destination chain of the first cross-chain transaction is stored in the first cross-chain gateway: Yes, submit the first cross-chain transaction to the second relay chain to send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; No, the first cross-chain gateway finds the second cross-chain gateway through the cross-chain gateway cluster for the second cross-chain gateway to find the second relay chain to send the first cross-chain transaction to the destination chain Complete the first cross-chain transaction; wherein, the information of the second relay chain is recorded in the second cross-chain gateway. 7. The method according to claim 6, wherein the second relay chain is used for the second cross-chain gateway to find a second relay chain to send the first cross-chain transaction to the destination chain to complete the The first cross-chain transaction includes: The second gateway finds the second relay chain corresponding to the destination chain according to the recorded distributed routing table; The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction certificate: If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; Otherwise, the first cross-chain transaction is not sent to the destination chain. The cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information It is used for verification by each cross-chain gateway and/or the second relay chain. The transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction proof, and custom fields. 8 . The method according to claim 3 , wherein the gateway cluster is composed of each of the cross-chain gateways, and the communication and propagation of each of the cross-chain gateways are performed in a P2P form through the distributed routing table. 9 . 9. A cross-chain method for blockchain transactions, wherein the method is applicable to a second relay chain on which a destination chain for cross-chain transactions is registered, the method comprising: Receive the first cross-chain transaction submitted by the cross-chain gateway; Send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; wherein, the cross-chain gateway stores the distributed routing table of the cross-chain transaction, and based on the distributed cross-chain routing table, Chain transactions are efficiently routed and propagated across layers, and the destination chain is registered on the second relay chain. 10. The method according to claim 9, wherein: sending the first cross-chain transaction to a destination chain to complete the first cross-chain transaction comprises: The second relay chain verifies whether the endorsement information of the first cross-chain transaction endorsed by the first relay chain is credible according to the cross-chain transaction certificate: If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; Otherwise, the first cross-chain transaction is not sent to the destination chain. The cross-chain transaction proof is encapsulated as the first cross-chain transaction request information by the IBPF (Inter Blockchain Transfer Protocol) protocol when the source chain sends the first cross-chain transaction, and the first relay chain parses and obtains the transaction information It is used for verification by each cross-chain gateway and/or the second relay chain. The transaction information includes at least one of the following: source chain contract ID1, destination chain contract ID2, cross-chain transaction index, source chain block number, cross-chain transaction proof, and custom fields. 11. A blockchain cross-chain transaction system, comprising: a source relay chain unit, the source relay chain unit includes an information receiving subunit and a transaction verification subunit, wherein; the information receiving subunit is configured to receive the first cross-chain transaction sent by the first relay chain; The transaction verification subunit is configured to determine whether the destination chain receiving the cross-chain transaction is located on the first relay chain after verifying that the first cross-chain transaction is credible: If yes, send the first cross-chain transaction to the destination chain to complete the first cross-chain transaction; If not, send the first cross-chain transaction to the corresponding first cross-chain gateway. A cross-chain gateway unit, the cross-chain gateway unit is composed of each of the cross-chain gateways, and the cross-chain gateway unit stores a distributed routing table for cross-chain transactions. Efficient cross-level routing and dissemination of cross-chain transactions, and the communication and dissemination of each of the cross-chain gateways are carried out in the form of P2P through the distributed routing table; The destination relay chain unit, where the destination chain of the cross-chain transaction is registered on the destination relay chain, for receiving the first cross-chain transaction submitted by the cross-chain gateway; and sending the first cross-chain transaction to the destination chain for completion The first cross-chain transaction; the destination chain is registered on the second relay chain. 12. A device, characterized in that the device comprises: one or more processors; memory for storing one or more programs, The one or more programs, when executed by the one or more processors, cause the one or more processors to perform the method of any of claims 1-10. 13. A storage medium storing a computer program, characterized in that, when the program is executed by a processor, the method according to any one of claims 1-10 is implemented.

Images