CN111489256A - Cross-chain processing method, equipment and system for multi-chain block chain system - Google Patents
Cross-chain processing method, equipment and system for multi-chain block chain system Download PDFInfo
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Abstract
The embodiment of the invention provides a cross-chain processing method, equipment and system for a multi-chain block chain system. The method comprises the following steps: receiving a cross-chain transaction query request, wherein the cross-chain transaction query request comprises an identifier of a target chain; acquiring cross-link transaction data of a target link from a transit link table of a source link according to the identifier of the target link, wherein the transit link table is used for storing the cross-link transaction data to be processed; and sending the cross-chain transaction data of the target chain to the target chain so that the target chain carries out cross-chain processing according to the cross-chain transaction data. The method of the embodiment of the invention realizes the cross-link processing in the multi-link block chain system and expands the application range of the multi-link block chain system.
Description
Technical Field
The embodiment of the invention relates to the technical field of block chains, in particular to a method, equipment and a system for processing cross-chains in a multi-chain block chain system.
Background
The blockchain is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism and an encryption algorithm. The blockchain is a decentralized database in nature, and is a brand new distributed infrastructure and computing mode that utilizes a blockchain data structure to verify and store data, utilizes a distributed node consensus algorithm to generate and update data, utilizes cryptography to ensure the security of data transmission and access, and utilizes an intelligent contract composed of automated script codes to program and operate data.
The blockchain technology needs to consider decentralization, scalability and throughput at the same time, and the low throughput of the blockchain in the actual service scenario has become the bottleneck of the widespread use of the blockchain technology at present. How to improve the throughput of the blockchain system has become a technical problem that is widely focused in the field of blockchain technology. Multi-chain techniques are an effective way to improve the throughput of a blockchain system.
Multi-chain techniques are increasingly gaining attention and being used as an effective way to improve the throughput of blockchain systems. One problem to be solved in the multi-chain blockchain system is how to transfer data between each sub-blockchain in the multi-chain blockchain system, i.e., the problem of cross-linking in the multi-chain blockchain system. If data cannot be transferred between each sub-blockchain in the multi-chain blockchain system, the application range of the multi-chain blockchain system is seriously affected.
Disclosure of Invention
The embodiment of the invention provides a cross-link processing method, equipment and a system for a multi-link block chain system, which are used for realizing cross-link processing in the multi-link block chain system and expanding the application range of the multi-link block chain system.
In a first aspect, an embodiment of the present invention provides a method for processing a cross-chain in a multi-chain blockchain system, which is applied to a source chain, and includes:
receiving a cross-chain transaction query request, wherein the cross-chain transaction query request comprises an identifier of a target chain;
acquiring cross-link transaction data of a target link from a transit link table of a source link according to the identifier of the target link, wherein the transit link table is used for storing the cross-link transaction data to be processed;
and sending the cross-chain transaction data of the target chain to the target chain so that the target chain carries out cross-chain processing according to the cross-chain transaction data.
In one possible implementation, after receiving the cross-chain transaction query request, the method further includes:
the signature in the cross-chain transaction query request is verified.
In one possible implementation, the method further includes:
and recording cross-chain processing and in-chain processing in the same ledger in the source chain.
In one possible implementation, before receiving the cross-chain transaction query request, the method further includes:
receiving transaction request information sent by a client, wherein the transaction request information comprises source account information, target account information and asset transfer information;
acquiring a sub-block chain identifier corresponding to the target account information;
determining cross-chain transaction data according to the transaction request information and the sub-block chain identifier;
and adding the cross-chain transaction data into the transit link table of the source chain.
In a possible implementation manner, acquiring a sub-block chain identifier corresponding to target account information includes:
sending an account number query request to a system chain, wherein the account number query request comprises target account number information, so that the system chain determines a sub-block chain identifier corresponding to the target account number information according to the target account number information, and the system chain comprises a mapping relation between an account number and the sub-block chain identifier;
and receiving a sub-block chain identifier corresponding to the target account information returned by the system chain.
In one possible implementation, the method further includes:
acquiring a transaction state corresponding to each cross-link transaction data in a transit link table;
and if the transaction state corresponding to the cross-chain transaction data is successful, deleting the cross-chain transaction data from the transit link list.
In a second aspect, an embodiment of the present invention provides a method for processing a cross-link in a multi-link blockchain system, which is applied to a target link, and includes:
sending a cross-chain transaction query request to a source chain, wherein the cross-chain transaction query request comprises an identifier of a target chain;
receiving cross-link transaction data sent by a source link, wherein the cross-link transaction data is obtained from a transit link table of the source link by the source link according to an identifier of a target link;
and performing cross-chain processing according to the cross-chain transaction data.
In one possible implementation, before sending the cross-chain transaction query request to the source chain, the method further includes:
the cross-chain transaction query request is signed.
In one possible implementation, the method further includes:
and recording cross-chain processing and in-chain processing in the same ledger in the target chain.
In one possible implementation, the method further includes:
and updating the transaction state corresponding to the cross-chain transaction data according to the cross-chain processing result.
In a third aspect, an embodiment of the present invention provides a cross-chain processing apparatus for use in a multi-chain blockchain system, including:
the receiving module is used for receiving a cross-chain transaction query request, and the cross-chain transaction query request comprises an identifier of a target chain;
the acquisition module is used for acquiring cross-link transaction data of the target link from a transit link table of the source link according to the identifier of the target link, wherein the transit link table is used for storing the cross-link transaction data to be processed;
and the sending module is used for sending the cross-chain transaction data of the target chain to the target chain so as to enable the target chain to carry out cross-chain processing according to the cross-chain transaction data.
In a fourth aspect, an embodiment of the present invention provides a cross-chain processing apparatus for use in a multi-chain blockchain system, including:
the sending module is used for sending a cross-chain transaction query request to the source chain, wherein the cross-chain transaction query request comprises an identifier of a target chain;
the receiving module is used for receiving cross-link transaction data sent by the source link, wherein the cross-link transaction data is obtained from a transit link table of the source link by the source link according to the identifier of the target link;
and the processing module is used for performing cross-chain processing according to the cross-chain transaction data.
In a fifth aspect, an embodiment of the present invention provides an electronic device, including:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the cross-chain processing method for use in a multi-chain blockchain system according to any one of the first aspect and/or the cross-chain processing method for use in a multi-chain blockchain system according to any one of the second aspect.
In a sixth aspect, an embodiment of the present invention provides a multi-chain blockchain system, including:
a system chain and a plurality of sub-block chains;
the network topology structure, the consensus algorithm and the organization participants of the plurality of sub-block chains are the same;
the system chain comprises a mapping relation between an account and a sub-block chain identifier and is used for determining the sub-block chain identifier corresponding to the account according to the account;
performing cross-chain processing on a source chain in a plurality of sub-blockchains by using the cross-chain processing method used in the multi-chain blockchain system according to any one of the first aspect;
a target chain of the plurality of sub-blockchains is subjected to cross-chain processing using the cross-chain processing method for use in the multi-chain blockchain system according to any one of the second aspects.
In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the cross-chain processing method for use in a multi-chain blockchain system according to any one of the first aspect and/or the cross-chain processing method for use in the multi-chain blockchain system according to any one of the second aspect.
According to the cross-link processing method, device and system for the multi-link blockchain system, provided by the embodiment of the invention, the cross-link transaction query request including the identifier of the target link is received, and the cross-link transaction data of the target link is acquired from the transfer link table of the source link according to the identifier of the target link, wherein the transfer link table is used for storing the cross-link transaction data to be processed, and the cross-link transaction data of the target link is sent to the target link, so that the target link performs cross-link processing according to the cross-link transaction data, the cross-link processing in the multi-link blockchain system is realized, and the application range of the multi-link blockchain system is expanded. .
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a diagram of an embodiment of a multi-chain blockchain system according to the present invention;
FIG. 2 is a flowchart of an embodiment of a cross-chain processing method for use in a multi-chain blockchain system;
FIG. 3 is a schematic diagram of a multi-chain blockchain system according to another embodiment of the present invention;
FIG. 4 is a flowchart of a cross-chain processing method for use in a multi-chain blockchain system according to another embodiment of the present invention;
FIG. 5 is a flowchart of another embodiment of a cross-chain processing method for use in a multi-chain blockchain system;
FIG. 6 is a flowchart of a cross-chain processing method for use in a multi-chain blockchain system according to another embodiment of the present invention;
FIG. 7 is a signaling flow diagram of another embodiment of a cross-chain processing method for use in a multi-chain blockchain system according to the present invention;
FIG. 8 is a flowchart illustrating a cross-chain processing method for use in a multi-chain blockchain system according to the present invention;
FIG. 9 is a schematic structural diagram illustrating an embodiment of a cross-chain processing apparatus for use in a multi-chain blockchain system according to the present invention;
FIG. 10 is a schematic structural diagram illustrating a cross-chain processing apparatus for use in a multi-chain blockchain system according to another embodiment of the present invention;
fig. 11 is a schematic structural diagram of an embodiment of an electronic device provided in the present invention.
With the above figures, certain embodiments of the invention have been illustrated and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
The terms "comprising" and "having," and any variations thereof, in the description and claims of this invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
The terms "first" and "second" in the present application are used for identification purposes only and are not to be construed as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of technical features indicated. "plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The embodiment of the invention provides a reasonable multi-chain block chain system, which is a premise for realizing safe and efficient cross-chain operation. FIG. 1 is a diagram of a multi-chain blockchain system according to an embodiment of the present invention. As shown in fig. 1, the multi-chain blockchain system provided in this embodiment may include: a system chain and a plurality of sub-block chains.
The network topology, consensus algorithm and organization participants of the multiple sub-blockchains are the same. The system chain comprises a mapping relation between the account and the sub-block chain identification and is used for determining the sub-block chain identification corresponding to the account according to the account.
At least one node in the system chain and each subarea chain belong to the same organization, and user information such as identity information, certificates and the like of each organization in the system chain and the plurality of subarea chains are identical.
The N represents the number of the sub-blockchains included in the multi-chain blockchain system, and the specific value may be determined according to the required throughput, for example, if the required throughput is increased, the value of the N may be increased, and if the required throughput is decreased, the value of the N may be decreased, which is not limited in this embodiment. M represents the number of organizational participants of the multi-chain blockchain system.
The diamonds in fig. 1 represent nodes in the system chain and the circles represent nodes in the sub-tile chain. Org1 represents organization participant 1; OrgM represents organization participant M. P1i represents the ith node in the subblock chain 1 and belongs to an organization participant 1; p1(i +2) represents the i +2 th node in the sub-block chain 1 and belongs to the organization participant 3; p3i denotes the ith node in the sub-chunk chain 3 and belongs to organization participant 1.
Optionally, in each sub-chunk chain, the identity information of each node participating in the sub-chunk chain may be registered, so that they know the existence of each other, for example, the registration may be completed by writing the identity information into the created chunk in the superridge fabric.
Optionally, for the same organization participant, although a plurality of nodes belonging to the same organization participant participate in a plurality of different sub-block chain networks, the existence of the identity of each other is known among the nodes. For example, the same Certificate Authority (CA) may be used for the same organization participant, and the Certificate and signature may be authenticated. After the nodes are started, the identity information, the Endpoint, the participating sub-block chain identifiers and other information of each node can be registered in each node of the organization through the organization.
Optionally, the system chain is further configured to maintain structural information of the multi-chain blockchain system, provide a management function of the routing rule,
alternatively, the subblock chain may be added in a horizontally extended manner.
The chain crossing method for the multi-chain blockchain system described in the following embodiments may be adopted to implement the data flow between each sub-blockchain in the multi-chain blockchain system provided in this embodiment. It should be noted that the chain crossing method for the multi-chain blockchain system provided in the following embodiments can not only solve the chain crossing problem of the multi-chain blockchain system provided in the present embodiment, but also be used in other multi-chain blockchain systems. For example, it can be used in hyper-ledger (Hyperridge Fabric), which is a very popular block-chain solution at present, and multiple organizations can form a federated block-chain network through the Hyperridge Fabric.
In the embodiment of the present invention, the source chain is a sub-block chain from which data comes in one cross-chain operation, and the target chain is a target sub-block chain for data transfer in one cross-chain operation, that is, the source chain is a sub-block chain corresponding to the source account information, and the target chain is a sub-block chain corresponding to the target account information. It is understood that the source chain and the target chain are not fixed, and a single sub-chunk chain may be either the source chain or the target chain.
Fig. 2 is a flowchart of an embodiment of a cross-chain processing method for use in a multi-chain blockchain system according to the present invention. The embodiment may be applied to a source chain, as shown in fig. 2, the method provided by the embodiment may include:
s201, receiving a cross-chain transaction query request, wherein the cross-chain transaction query request comprises an identification of a target chain.
In this embodiment, the cross-chain transaction query request is periodically sent by the target chain, or sent by event triggering, and is used to obtain the cross-chain transaction data with the destination address as the target chain in the source chain.
The cross-chain transaction query request in this embodiment may include an identification of the target chain, for example, a sub-blockchain identification of the target chain may be employed.
S202, acquiring cross-chain transaction data of the target chain from a transit link table of the source chain according to the identification of the target chain, wherein the transit link table is used for storing the cross-chain transaction data to be processed.
The transfer link table of this embodiment is used to store cross-link transaction data to be processed, and each cross-link transaction data may include source account information, target account information, asset transfer information, and the like. The following exemplary data structure for a specific cross-chain transaction data is given:
in this embodiment, cross-link transaction data of the target link is obtained from the transit link table of the source link according to the identifier of the target link. For example, the cross-chain transaction data of the target chain may be the cross-chain transaction data of the transit link table, where the cross-chain transaction data target chain identifier is the same as the identifier of the target chain included in the cross-chain transaction query request.
And S203, sending the cross-chain transaction data of the target chain to the target chain so that the target chain carries out cross-chain processing according to the cross-chain transaction data.
In this embodiment, after determining the cross-chain transaction data of the target chain, the cross-chain transaction data of the target chain is sent to the target chain, so that the target chain performs cross-chain processing according to the cross-chain transaction data.
Optionally, in this embodiment, after determining the cross-chain transaction data of the target chain, signature processing may be performed on the corresponding data, so as to improve the security of the cross-chain processing.
According to the cross-link processing method for the multi-link blockchain system, the cross-link transaction query request including the identifier of the target link is received, and the cross-link transaction data of the target link is acquired from the transfer link table of the source link according to the identifier of the target link, wherein the transfer link table is used for storing the cross-link transaction data to be processed, and the cross-link transaction data of the target link is sent to the target link, so that the target link can perform cross-link processing according to the cross-link transaction data, cross-link processing in the multi-link blockchain system is achieved, and the application range of the multi-link blockchain system is expanded.
Optionally, after receiving the cross-chain transaction query request, the method may further include: the signature in the cross-chain transaction query request is verified.
It is to be appreciated that in order to improve the security of the cross-chain processing, the cross-chain transaction query request sent by the target chain may be signed. After a source link receives a cross-link transaction query request sent by a target link, firstly, a signature in the cross-link transaction query request needs to be verified, and if the signature passes the verification, subsequent cross-link processing is executed; if the verification fails, the cross-chain processing is terminated.
Optionally, to facilitate tracing back the cross-chain processing in the following step, on the basis of the foregoing embodiment, the method provided in this embodiment may further include: and recording cross-chain processing and in-chain processing in the same ledger in the source chain.
In-chain processing in this embodiment is data processing that occurs inside the source chain. Optionally, in order to reduce the influence on the service chain code, the details of the cross-chain implementation may be completed by the relay chain code.
For example, in this embodiment, the chain crossing record and the service chain code record may be recorded in the same account book by the relay chain code, which may provide convenience for performing the chain crossing operation tracing in the future.
On the basis of the foregoing embodiment, before receiving the cross-chain transaction query request, the method provided in this embodiment may further include: receiving transaction request information sent by a client, wherein the transaction request information comprises source account information, target account information and asset transfer information; acquiring a sub-block chain identifier corresponding to the target account information; determining cross-chain transaction data according to the transaction request information and the sub-block chain identifier; and adding the cross-chain transaction data into the transit link table of the source chain.
The client in this embodiment may be an application APP installed on the terminal device, receives an instruction input by a user, generates transaction request information according to the user instruction, and sends the transaction request information to the source chain. The transaction request information in this embodiment may include source account information, target account information, and asset transfer information, which is used to describe one cross-chain transaction. In this embodiment, after the source chain receives the transaction request information sent by the client, cross-chain transaction data is determined according to the transaction request information and the sub-block chain identifier corresponding to the target account information, and the cross-chain transaction data is added to the transit chain table of the source chain, so that the target chain can obtain corresponding cross-chain transaction data from the transit chain table according to the identifier of the target chain, and perform cross-chain processing.
In some embodiments, one implementation manner of obtaining the sub-block chain identifier corresponding to the target account information may be: sending an account number query request to a system chain, wherein the account number query request comprises target account number information, so that the system chain determines a sub-block chain identifier corresponding to the target account number information according to the target account number information, and the system chain comprises a mapping relation between an account number and the sub-block chain identifier; and receiving a sub-block chain identifier corresponding to the target account information returned by the system chain.
The system chain in this embodiment includes a mapping relationship between the account and the sub-blockchain identifier, so that a function of searching for the sub-blockchain identifier corresponding to the account can be provided.
In this embodiment, after receiving transaction request information sent by a client, a source chain sends an account number query request to a system chain, where the account number query request includes target account number information, so that the system chain determines a sub-block chain identifier corresponding to the target account number information according to the target account number information.
On the basis of any of the foregoing embodiments, in order to further improve the processing efficiency, the method provided in this embodiment may further include: acquiring a transaction state corresponding to each cross-link transaction data in a transit link table; and if the transaction state corresponding to the cross-chain transaction data is successful, deleting the cross-chain transaction data from the transit link list.
In the embodiment, the cross-chain transaction data successfully transacted is deleted from the transit link list, so that the data volume in the transit link list can be reduced, the processing speed of the cross-chain transaction query request is improved, and the problem that the system is slowed down due to too much data in the transit link list is effectively solved.
In this embodiment, the transaction state corresponding to each cross-link transaction data in the transit link table is obtained, for example, by querying a transaction identifier in the target link. The present embodiment does not limit this.
In order to support information communication processed in a cross-chain mode, the nodes need to support the underlying trusted transmission. Fig. 3 is a schematic diagram of a multi-chain blockchain system according to another embodiment of the present invention. As shown in fig. 3, based on the multi-chain blockchain system shown in fig. 1, the multi-chain blockchain system of the present embodiment provides a secure underlying communication mechanism.
As shown in fig. 3, in order to ensure that the cross-link processing is safe and reliable, and the whole cross-link process can be endorsed, in this embodiment, the nodes of each organization only believe that the organization is the nodes on other sub-blockchains, so the cross-link communication only occurs between the nodes of the same organization on different sub-blockchains. The node guarantees the reliability of the information by authenticating the identity information of the other party and the signature. After each node is started, cross-link transaction query requests from other nodes of the organization are monitored according to configuration, and in order to improve communication efficiency and security, a Remote Procedure Call (RPC) protocol may be used for communication in this embodiment.
Meanwhile, each node needs to provide an interface for bottom layer communication for the chain code, so that the chain code can be conveniently used for calling the chain codes on other sub-block chain networks in a cross-chain mode through the interface. For example, in Hyperhedger Fabric, an interface can be added on the existing basis by extending the shim interface in the node code: func (stub) chainescorting InvokeDichangeChanoding (network string, chaincodeName string, args [ ] [ ] byte, channel string) pb. Alternatively, the interface in fig. 3 may adopt a shim interface.
It should be noted that cross-link communication only occurs in the endorsement stage, and if the endorsement node needs to query the link code information on other sub-block chains, a cross-link transaction query request is triggered. And due to safety considerations, cross-chain processing can only call a query interface and cannot call an interface for write operation.
On the basis of the above embodiments, the present embodiment combines the above embodiments. Fig. 4 is a flowchart of a cross-chain processing method for use in a multi-chain blockchain system according to another embodiment of the present invention. As shown in fig. 4, the method provided by this embodiment may include:
s401, receiving a cross-chain transaction query request, wherein the cross-chain transaction query request comprises an identification of a target chain.
S402, verifying the signature in the cross-chain transaction inquiry request. If the verification is passed, executing S403; if the verification fails, the cross-chain processing is terminated.
S403, decoding the cross-chain transaction query request to obtain cross-chain transaction data of the target chain.
S404, performing signature processing on the cross-chain transaction data of the target chain, and sending the cross-chain transaction data subjected to signature processing to the target chain.
In this embodiment, for example, a shim communication interface may be called to send the cross-chain transaction data after signature processing to the target chain.
On the basis of any one of the above embodiments, the cross-chain processing method for the multi-chain blockchain system further improves the security and reliability of cross-chain processing by performing signature processing on the cross-chain transaction query request and the cross-chain transaction data.
FIG. 5 is a flowchart of another embodiment of a cross-chain processing method for use in a multi-chain blockchain system according to the present invention. The method provided by this embodiment may be applied to a target chain, as shown in fig. 5, and the method provided by this embodiment may include:
s501, sending a cross-chain transaction query request to the source chain, wherein the cross-chain transaction query request comprises the identification of the target chain.
Optionally, in this embodiment, before sending the cross-chain transaction query request to the source chain, the target chain may first establish an RPC connection with the source chain.
In this embodiment, the target chain may periodically send a cross-chain transaction query request to the source chain, or may send a cross-chain transaction query request to the source chain when receiving the trigger type message. The triggering type message for triggering the target chain to send the cross-chain transaction query request can be triggered by any node in the multi-chain blockchain system. The triggering type message can not directly modify any account book data, and only triggers the transit link code to perform data transfer according to the source account information and the target account information of the cross-link transaction data.
S502, cross-chain transaction data sent by the source chain is received, and the cross-chain transaction data is obtained from a transit chain table of the source chain according to the identification of the target chain.
In this embodiment, the cross-link transaction data received by the target link is obtained from the transit link table of the source link for the source link according to the identifier of the target link.
And S503, performing cross-chain processing according to the cross-chain transaction data.
According to the cross-chain processing method for the multi-chain block chain system, the cross-chain transaction query request including the identification of the target chain is sent to the source chain, the cross-chain transaction data sent by the source chain is received, the cross-chain transaction data are obtained from the transit chain table of the source chain according to the identification of the target chain by the source chain, and cross-chain processing is carried out according to the cross-chain transaction data, so that cross-chain processing in the multi-chain block chain system is achieved, and the application range of the multi-chain block chain system is expanded.
Optionally, to improve the security and reliability of the cross-chain processing, before sending the cross-chain transaction query request to the source chain, the method may further include: the cross-chain transaction query request is signed. The embodiment does not limit the specific implementation manner of the signature.
Optionally, to facilitate tracing back the cross-chain processing in the following step, on the basis of the foregoing embodiment, the method provided in this embodiment may further include: and recording cross-chain processing and in-chain processing in the same ledger in the target chain.
Optionally, the method may further include: and updating the transaction state corresponding to the cross-chain transaction data according to the cross-chain processing result. For example, if the cross-link processing is successful, transferring the corresponding data to the target account number, and updating the transaction state corresponding to the cross-link transaction data to Success; and if the cross-chain processing fails, returning the corresponding data to the source account number, and updating the transaction state corresponding to the cross-chain transaction data to Fail.
On the basis of the above embodiments, the present embodiment combines the above embodiments. FIG. 6 is a flowchart of a cross-chain processing method for use in a multi-chain blockchain system according to another embodiment of the present invention. As shown in fig. 6, the method provided by this embodiment may include:
s601, establishing RPC connection with the source chain.
In this embodiment, for example, a chain code of the target chain may call a shim, invoke, network, chain code interface, query an endpoint of a participating node in a sub-block chain network of the target network corresponding to the organization, and then establish an RPC connection with the node.
S602, signing the cross-chain transaction query request, and sending the signed cross-chain transaction query request to the source chain, wherein the cross-chain transaction query request comprises the identification of the target chain.
In order to improve security and reliability, in the embodiment, the cross-chain transaction query request is subjected to signature processing. In this embodiment, for example, the cross-chain transaction query request after signature processing may be packaged into an RPC request and sent to the source chain node.
S603, cross-chain transaction data sent by the source chain is received, and the cross-chain transaction data is obtained from a transit chain table of the source chain according to the identification of the target chain.
A response message is received from the source chain to the cross-chain transaction query request.
And S604, performing signature verification and decoding on the cross-chain transaction data, and performing cross-chain processing according to the decoded cross-chain transaction data.
In the embodiment, after cross-chain transaction data sent by a source chain is received, signature verification is performed on the data, and if the data passes the verification, subsequent cross-chain processing is continuously executed; if the verification fails, the cross-chain processing is terminated. And decoding the cross-chain transaction data passing the signature verification, and returning the decoded data to the corresponding chain code so as to perform cross-chain processing.
Fig. 7 is a signaling flowchart of another embodiment of a cross-chain processing method for use in a multi-chain blockchain system according to the present invention. As shown in fig. 7, the method provided by this embodiment may include:
s701, the client sends transaction request information to the source chain, wherein the transaction request information comprises source account information, target account information and asset transfer information.
For example, when a user needs to transfer 50 units of digital certificates from account a to account B, corresponding instruction information may be input to the client, and the client may generate transaction request information according to the instruction information input by the user and send the transaction request information to the source chain.
The transaction request information in this embodiment may include, for example, source account number information, i.e., account a, target account number information, i.e., account B, and asset transfer information, i.e., a 50-unit digital voucher.
S702, the source chain sends an account number query request to the system chain, wherein the account number query request comprises target account number information.
In this embodiment, after receiving the transaction request information sent by the client, the source chain sends an account query request to the system chain.
And S703, the system chain determines a sub-block chain identifier corresponding to the target account information according to the target account information.
The system chain in this embodiment may include a mapping relationship between the account and the sub-blockchain identifier, so that a function of searching for the sub-blockchain identifier corresponding to the account can be provided.
And S704, the system chain sends the sub-block chain identification corresponding to the target account information to the source chain.
In this embodiment, after determining the sub-block chain identifier corresponding to the target account information, the system chain sends the sub-block chain identifier corresponding to the target account information to the source chain. It can be understood that, in this embodiment, the identifier of the sub-block chain corresponding to the target account information is an identifier of the target chain.
S705, the source chain determines cross-chain transaction data according to the transaction request information and the sub-block chain identifier corresponding to the target account information, and adds the cross-chain transaction data into a transfer chain table of the source chain.
For example, the following data structure may be employed for storing cross-chain transaction data.
And S706, the source chain sends the sub-block chain identification corresponding to the target account information to the client.
Optionally, the source chain may send a sub-block chain identifier corresponding to the target account information to the client, that is, notify the client of the identifier of the target chain.
S707, the client sends a first trigger message to the target chain, for triggering the target chain to initiate a cross-chain transaction query.
Optionally, the first trigger message may include an identifier of the source chain, so that the target chain sends the cross-chain transaction query request to the source chain.
S708, the target chain sends a cross-chain transaction query request to the source chain, wherein the cross-chain transaction query request comprises the identification of the target chain.
And S709, the source chain acquires cross-chain transaction data of the target chain from the transit chain table of the source chain according to the identification of the target chain.
And S710, the source chain sends cross-chain transaction data of the target chain to the target chain.
And S711, the target chain performs cross-chain processing according to the cross-chain transaction data, and updates the transaction state corresponding to the cross-chain transaction data according to the result of the cross-chain processing.
And S712, the client sends a second trigger message to the source chain, and the second trigger message is used for triggering the source chain to initiate the cleaning of the transit link table.
It should be noted that the second trigger message in this embodiment may be triggered by the client, or may be triggered periodically.
S713, the source chain sends a transaction state query request to the target chain.
And S714, the target chain sends a transaction state response message to the source chain.
And S715, the source chain cleans the transfer chain table according to the transaction state response message.
If the transaction state corresponding to the cross-chain transaction data is successful, deleting the cross-chain transaction data from the transit link list; and if the transaction state corresponding to the cross-chain transaction data is failure, returning the assets corresponding to the cross-chain transaction data to the source account, and then deleting the cross-chain transaction data from the transit link table.
As shown in fig. 7, a successful cross-chain transaction requires the client to initiate three sub-transactions, and only if at least the first two sub-transactions are successful, the one cross-chain transaction is considered to be successful. It will be appreciated that if the cross-chain transaction fails, the client will typically actively trigger a third sub-transaction in order to facilitate the return of the transferred digital voucher to the source account number. By cleaning the transfer chain table of the source chain, the problem that the system is slowed down due to too much data in the transfer chain table can be effectively solved. It should be noted that the cleaning of the transfer link table may be triggered by the client of the cross-link transaction source account, or may be triggered periodically by a special periodic trigger condition.
As shown in fig. 7, in the second and third sub-transactions of this embodiment, the client sends the trigger type message. The trigger type message can be sent by any node in the network, because the trigger type message cannot directly modify any account book data, the trigger type message only triggers the transfer of the digital certificate according to the source account number information and the target account number information in the cross-link transaction data, and a trigger cannot interfere with cross-link processing.
Optionally, once a cross-chain transaction is triggered, the whole process is recorded in the ledger of each sub-blockchain participating in the cross-chain processing. The asset transfer can be only carried out by the transfer chain code according to the source account information and the target account information when the cross-chain transaction is initiated, so that the double-flower situation can be avoided.
Fig. 8 is a flowchart illustrating a cross-chain processing method for use in a multi-chain blockchain system according to the present invention. As shown in FIG. 8, a cross-chain process flow between a source chain, or sub-blockchain p, and a target chain, or sub-blockchain q, is shown.
Optionally, each network node may include a transit link code and a traffic link code. The transit chain code as the pre-installed chain code and the service chain code are installed in the same channel. The chain crossing processing is completed by the transit chain codes, so that the influence on the business chain codes is reduced, and in order to facilitate the tracing of chain crossing operation in the future, the transit chain codes can record the chain crossing processing flow of the transit chain codes and the business chain codes in the same account book. As shown in fig. 8, the relay link code and the service link code of the sub-block chain p record corresponding data in the account book of the sub-block chain p, i.e. the account book 1; the transit link code and the business link code of the sub-block chain q will record corresponding data in the ledger, namely ledger 2, of the sub-block chain q.
As shown in fig. 8, the source account information and the target account information mark the source address and the destination address of the data to be transferred, the asset information marks the number of the digital certificates to be transferred, and the transfer link code transfers the digital certificates strictly according to the source account information and the target account information, thereby avoiding the occurrence of double-flower situations. If the cross-chain transaction is successful, the digital certificate is transferred to the target account number, otherwise, the digital certificate is returned to the source account number.
For example, in HyperLegendr Fabric, the transitive chain code provides the following interfaces:
func(stub*ChaincodeStub)Send(sourceChaincodeName string,sourceAccount[][]byte,targetAccount[][]byte,args[][]byte)pb.Response
func (stub) Rcv (targetChalcondeName string, sourceAccount [ ] [ ] byte, targetAccount [ ] [ ] byte, transactionidString) pb.
Fig. 9 is a schematic structural diagram of an embodiment of a cross-chain processing apparatus for use in a multi-chain blockchain system according to the present invention. As shown in fig. 9, the cross-chain processing apparatus 90 for use in the multi-chain blockchain system provided in the present embodiment may include: a receiving module 901, an obtaining module 902 and a sending module 903.
A receiving module 901, configured to receive a cross-chain transaction query request, where the cross-chain transaction query request includes an identifier of a target chain;
an obtaining module 902, configured to obtain, according to an identifier of a target chain, cross-chain transaction data of the target chain from a transit chain table of a source chain, where the transit chain table is used to store cross-chain transaction data to be processed;
a sending module 903, configured to send the cross-chain transaction data of the target chain to the target chain, so that the target chain performs cross-chain processing according to the cross-chain transaction data.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 2, and the implementation principle and the technical effect are similar, which are not described herein again.
Optionally, after receiving the cross-chain transaction query request, the signature in the cross-chain transaction query request may also be verified.
Optionally, the cross-chain processing and the in-chain processing may be recorded in the same ledger in the source chain.
Optionally, before receiving the cross-chain transaction query request, the method may further include: receiving transaction request information sent by a client, wherein the transaction request information comprises source account information, target account information and asset transfer information; acquiring a sub-block chain identifier corresponding to the target account information; determining cross-chain transaction data according to the transaction request information and the sub-block chain identifier; and adding the cross-chain transaction data into the transit link table of the source chain.
Optionally, the obtaining of the sub-block chain identifier corresponding to the target account information may specifically include: sending an account number query request to a system chain, wherein the account number query request comprises target account number information, so that the system chain determines a sub-block chain identifier corresponding to the target account number information according to the target account number information, and the system chain comprises a mapping relation between an account number and the sub-block chain identifier; and receiving a sub-block chain identifier corresponding to the target account information returned by the system chain.
Optionally, the method may further include: acquiring a transaction state corresponding to each cross-link transaction data in a transit link table; and if the transaction state corresponding to the cross-chain transaction data is successful, deleting the cross-chain transaction data from the transit link list.
Fig. 10 is a schematic structural diagram of a cross-chain processing apparatus for use in a multi-chain blockchain system according to still another embodiment of the present invention. As shown in fig. 10, the cross-chain processing apparatus 100 for use in the multi-chain blockchain system provided in the present embodiment may include: a sending module 1001, a receiving module 1002 and a processing module 1003.
A sending module 1001, configured to send a cross-chain transaction query request to a source chain, where the cross-chain transaction query request includes an identifier of a target chain.
The receiving module 1002 is configured to receive cross-link transaction data sent by a source link, where the cross-link transaction data is obtained from a transit link table of the source link according to an identifier of a target link.
The processing module 1003 is configured to perform cross-link processing according to the cross-link transaction data.
The apparatus of this embodiment may be used to implement the technical solution of the method embodiment shown in fig. 5, and the implementation principle and the technical effect are similar, which are not described herein again.
Optionally, the cross-chain transaction query request may be signed before being sent to the source chain.
Optionally, the cross-chain processing and the in-chain processing may be recorded in the same ledger in the target chain.
Optionally, the transaction state corresponding to the cross-chain transaction data may be updated according to the result of the cross-chain processing.
Fig. 11 is a schematic view showing an electronic device according to an embodiment of the present invention, which is only illustrated in fig. 11, and the embodiment of the present invention is not limited thereto. Fig. 11 is a schematic structural diagram of an embodiment of an electronic device provided in the present invention. As shown in fig. 11, the electronic device 110 provided in this embodiment may include: memory 1101, processor 1102, and bus 1103. The bus 1103 is used to realize connection between the elements.
The memory 1101 stores a computer program, and the computer program can implement any of the technical solutions of the above-mentioned method embodiments when executed by the processor 1102.
Wherein the memory 1101 and the processor 1102 are electrically connected, directly or indirectly, to enable data transfer or interaction. For example, the components may be electrically coupled to each other via one or more communication buses or signal lines, such as bus 1103. The memory 1101 stores a computer program for implementing a cross-chain processing method used in the multi-chain blockchain system, and includes at least one software functional module that can be stored in the memory 1101 in the form of software or firmware, and the processor 1102 executes various functional applications and data processing by running the software program and the module stored in the memory 1101.
The Memory 1101 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like. The memory 1101 is used for storing programs, and the processor 1102 executes the programs after receiving execution instructions. Further, the software programs and modules within the above-described storage 1101 may also include an operating system, which may include various software components and/or drivers for managing system tasks (e.g., memory management, storage device control, power management, etc.), and may communicate with various hardware or software components to provide an operating environment for other software components.
The processor 1102 may be an integrated circuit chip having signal processing capabilities. The Processor 1102 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and so on. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. It will be appreciated that the configuration of FIG. 11 is merely illustrative and may include more or fewer components than shown in FIG. 11 or have a different configuration than shown in FIG. 11. The components shown in fig. 11 may be implemented in hardware and/or software.
It should be noted that the electronic device provided in this embodiment includes, but is not limited to, at least one of the following: user side equipment and network side equipment. User-side devices include, but are not limited to, computers, smart phones, tablets, digital broadcast terminals, messaging devices, game consoles, personal digital assistants, and the like. The network-side device includes, but is not limited to, a single network server, a server group consisting of a plurality of network servers, or a cloud consisting of a large number of computers or network servers based on cloud computing, wherein the cloud computing is one of distributed computing and is a super virtual computer consisting of a group of loosely coupled computers.
The electronic device provided in this embodiment may be configured to execute the cross-chain processing method applied to the source chain in any of the method embodiments, and/or the cross-chain processing method applied to the target chain in any of the method embodiments, which have similar implementation principles and technical effects, and are not described herein again.
An embodiment of the present invention further provides a multi-chain blockchain system, which may include: a system chain and a plurality of sub-block chains; the network topology structure, the consensus algorithm and the organization participants of the plurality of sub-block chains are the same; the system chain comprises a mapping relation between an account and a sub-block chain identifier and is used for determining the sub-block chain identifier corresponding to the account according to the account; a source chain in the plurality of sub-blockchains can perform cross-chain processing by using a cross-chain processing method applied to the source chain and used in the multi-chain blockchain system; a target chain of the plurality of sub-blockchains may be cross-chain processed using a cross-chain processing method applied to the target chain for use in a multi-chain blockchain system.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, can implement the method for processing across chains in a multi-chain blockchain system provided in any of the above method embodiments. The computer-readable storage medium in this embodiment may be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, etc. that is integrated with one or more available media, and the available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., SSDs), etc.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (15)
1. A cross-chain processing method for a multi-chain blockchain system is applied to a source chain and is characterized by comprising the following steps:
receiving a cross-chain transaction query request, wherein the cross-chain transaction query request comprises an identification of a target chain;
acquiring cross-link transaction data of the target chain from a transit link table of the source chain according to the identifier of the target chain, wherein the transit link table is used for storing the cross-link transaction data to be processed;
and sending the cross-chain transaction data of the target chain to the target chain so that the target chain carries out cross-chain processing according to the cross-chain transaction data.
2. The method of claim 1, wherein after receiving the cross-chain transaction query request, the method further comprises:
and verifying the signature in the cross-chain transaction inquiry request.
3. The method of claim 1, further comprising:
and recording cross-chain processing and in-chain processing in the same ledger in the source chain.
4. The method of claim 1, wherein prior to receiving the cross-chain transaction query request, the method further comprises:
receiving transaction request information sent by a client, wherein the transaction request information comprises source account information, target account information and asset transfer information;
acquiring a sub-block chain identifier corresponding to the target account information;
determining cross-chain transaction data according to the transaction request information and the sub-block chain identifier;
and adding the cross-chain transaction data into a transit chain table of the source chain.
5. The method according to claim 4, wherein the obtaining of the sub-block chain identifier corresponding to the target account information includes:
sending an account number query request to a system chain, wherein the account number query request comprises the target account number information, so that the system chain determines a sub-block chain identifier corresponding to the target account number information according to the target account number information, and the system chain comprises a mapping relation between an account number and the sub-block chain identifier;
and receiving a sub-block chain identifier corresponding to the target account information returned by the system chain.
6. The method according to any one of claims 1-5, further comprising:
acquiring a transaction state corresponding to each cross-link transaction data in the transit link list;
and if the transaction state corresponding to the cross-chain transaction data is successful, deleting the cross-chain transaction data from the transit link list.
7. A cross-chain processing method for a multi-chain blockchain system is applied to a target chain, and is characterized by comprising the following steps:
sending a cross-chain transaction query request to a source chain, wherein the cross-chain transaction query request comprises an identification of the target chain;
receiving cross-link transaction data sent by the source link, wherein the cross-link transaction data is obtained from a transit link table of the source link by the source link according to the identifier of the target link;
and performing cross-chain processing according to the cross-chain transaction data.
8. The method of claim 7, wherein prior to sending the cross-chain transaction query request to the source chain, the method further comprises:
signing the cross-chain transaction query request.
9. The method of claim 7, further comprising:
and recording cross-chain processing and in-chain processing in the same ledger in the target chain.
10. The method according to any one of claims 7-9, further comprising:
and updating the transaction state corresponding to the cross-chain transaction data according to the result of the cross-chain processing.
11. A cross-chain processing apparatus for use in a multi-chain blockchain system, comprising:
the system comprises a receiving module, a searching module and a processing module, wherein the receiving module is used for receiving a cross-chain transaction query request which comprises an identification of a target chain;
an obtaining module, configured to obtain, according to the identifier of the target chain, cross-chain transaction data of the target chain from a transit link table of the source chain, where the transit link table is used to store cross-chain transaction data to be processed;
and the sending module is used for sending the cross-chain transaction data of the target chain to the target chain so as to enable the target chain to carry out cross-chain processing according to the cross-chain transaction data.
12. A cross-chain processing apparatus for use in a multi-chain blockchain system, comprising:
a sending module, configured to send a cross-chain transaction query request to a source chain, where the cross-chain transaction query request includes an identifier of the target chain;
a receiving module, configured to receive cross-link transaction data sent by the source link, where the cross-link transaction data is obtained by the source link from a transit link table of the source link according to the identifier of the target link;
and the processing module is used for performing cross-chain processing according to the cross-chain transaction data.
13. An electronic device, comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the cross-chain processing method for use in a multi-chain blockchain system according to any one of claims 1 to 6 and/or the cross-chain processing method for use in a multi-chain blockchain system according to any one of claims 7 to 10.
14. A multi-chain blockchain system, comprising:
a system chain and a plurality of sub-block chains;
the network topology structure, the consensus algorithm and the organization participants of the plurality of sub-block chains are the same;
the system chain comprises a mapping relation between an account and a sub-block chain identifier and is used for determining the sub-block chain identifier corresponding to the account according to the account;
performing cross-chain processing on a source chain in the plurality of sub-blockchains by using the cross-chain processing method used in the multi-chain blockchain system according to any one of claims 1 to 6;
a target chain of the plurality of sub-blockchains is subjected to cross-chain processing using the cross-chain processing method for use in a multi-chain blockchain system according to any one of claims 7 to 10.
15. A computer-readable storage medium, having stored thereon a computer program for execution by a processor to implement a cross-chain processing method for use in a multi-chain blockchain system as claimed in any one of claims 1 to 6 and/or a cross-chain processing method for use in a multi-chain blockchain system as claimed in any one of claims 7 to 10.
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