CN111666336B - Method, system and electronic equipment for data intercommunication among block chains - Google Patents
Method, system and electronic equipment for data intercommunication among block chains Download PDFInfo
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Abstract
The invention provides a data intercommunication method, a system and electronic equipment between block chains. The data intercommunication method of the block chain comprises the following steps: a first adaptation tool listens for transactions of a first blockchain, wherein the first adaptation tool adapts to the first blockchain; the first adapting tool determines that the transaction is a transaction triggering the second blockchain intercommunication, and calls a preset relay service to map the content of the transaction into the transaction construction content of the second blockchain; and the second adaptation tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service, and the second adaptation tool is adapted with the second blockchain. According to the embodiment of the invention, excessive reconstruction of the blockchain of the two communicating parties is not needed, and the adaptation process is completed only through the relay service, so that the method has the advantages of convenience, simplicity and reliability in blockchain data communication and reduction of reconstruction cost.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a system, and an electronic device for data interworking between blockchains.
Background
Data interworking or traffic exchange is typically required between different blockchains, such as: the large-scale blockchain service platform generally needs to perform data intercommunication or service intercommunication with different blockchain platforms, and uses the different blockchain platforms as side chains of the large-scale platform to perform data exchange and transaction calling of the cross-regional blockchain.
In the related art, the problem of side chain intercommunication of large-scale blockchain service platforms is that, because the blockchain platforms of the large-scale blockchain service platforms are more and the blockchain bottom technologies used by the side chains are generally different, when the large-scale blockchain service platforms are butted with different blockchain platforms, both sides need to carry out a large amount of development work, and because the side chains are more, each side chain needs to be developed once, and obviously, the requirement that the large-scale blockchain service platforms are butted with different blockchain platforms as the side chains cannot be well met.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a data intercommunication method, a system and electronic equipment between block chains. The data intercommunication method among the blockchains has the advantages of convenience, simplicity and reliability in data intercommunication of the blockchains, and reduces the reconstruction cost.
In a first aspect, the present invention provides a method for data interworking between blockchains, including: a first adaptation tool listens for transactions of a first blockchain, wherein the first adaptation tool adapts to the first blockchain; the first adapting tool determines that the transaction is a transaction triggering the second blockchain intercommunication, and calls a preset relay service to map the content of the transaction into the transaction construction content of the second blockchain; and the second adaptation tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service, and the second adaptation tool is adapted with the second blockchain.
In some examples, the first adaptation tool determining that the transaction is a transaction that triggers second blockchain interworking, invoking a preset relay service to map content of the transaction to transaction construct content of a second blockchain, comprising: the first adapting tool invokes a monitoring-to-querying service provided by the relay service to determine whether the transaction is a transaction triggering second blockchain intercommunication; if yes, further calling a transaction checking service provided by the relay service, and acquiring parameters of the transaction construction content required to be mapped into the second blockchain from the transaction content of the first blockchain, so that the relay service maps the parameters into the transaction construction content of the second blockchain according to a preset mapping contract.
In some examples, the second adaptation tool obtains a transaction of a second blockchain performed by the second blockchain based on the transaction construct content according to a trigger service call sent by the relay service, comprising: the second adapting tool receives the trigger service determined by the relay service according to the monitoring pair; and obtaining a transaction of a second blockchain executed by the second blockchain according to the transaction construction content, and initiating the transaction of the second blockchain to the second blockchain.
In some examples, further comprising: the relay service records the contents of the transaction of the first blockchain and records the transaction construction contents mapping the contents of the transaction of the first blockchain to the second blockchain.
In some examples, further comprising: the relay service obtains an execution result of the second blockchain executing the transaction of the second blockchain through the second adapting tool; determining whether the transaction of the second blockchain is successful according to the execution result; if the transaction fails, constructing a recall transaction, and submitting the recall transaction to the first blockchain through the first adaptation tool so that the first blockchain executes transaction rollback;
If the transaction is successful, a confirmation is submitted to the first blockchain through the first adaptation tool for the first blockchain to confirm the transaction.
In some examples, the determining whether the transaction of the second blockchain is successful based on the execution result includes: judging whether the execution result meets a preset condition or not; if not, determining that the transaction fails, otherwise, determining that the transaction is successful.
In a second aspect, the present invention also provides a system for interworking data between blockchains, including: the system comprises a first adapting tool, a relay and a second adapting tool, wherein the first adapting tool is used for monitoring the transaction of a first blockchain, and when the transaction is determined to be the transaction triggering the intercommunication of a second blockchain, a preset relay service in the relay is called to map the content of the transaction to the transaction construction content of the second blockchain; the second adapting tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to a trigger service sent by the relay service; wherein a first adaptation tool is adapted with the first blockchain and a second adaptation tool is adapted with the second blockchain.
In some examples, the first adapting tool is to: invoking a monitoring pair query service provided by the relay service to determine whether the transaction is a transaction triggering second blockchain intercommunication; if yes, further calling a transaction checking service provided by the relay service, and acquiring parameters of the transaction construction content required to be mapped into the second blockchain from the transaction content of the first blockchain, so that the relay service maps the parameters into the transaction construction content of the second blockchain according to a preset mapping contract.
In a third aspect, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the method of data interworking between blockchains according to the first aspect when the computer program is executed.
In a fourth aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of inter-blockchain data interworking as described in the first aspect.
The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:
According to the embodiment of the invention, when the block chains trade, such as the trade initiated by the first block chain to the second area block, the content of the trade of the first block chain can be mapped into the trade construction content of the second block chain through the relay service, so that the trade of the second block chain executable by the second block chain is obtained, and the data intercommunication, such as the intercommunication of service data, among the block chains is completed. When the method is used for realizing the intercommunication among the blockchains, excessive reconstruction of the blockchains of the two intercommunication parties is not needed, and the adaptation process is completed only through the relay service, so that the method has the advantages of convenience, simplicity and reliability in the data intercommunication of the blockchains, and the reconstruction cost is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for interworking data between blockchains according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the implementation of inter-blockchain data interworking by a relay chain in a method for inter-blockchain data interworking according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for interworking data between blockchains according to another embodiment of the present invention;
FIG. 4 is a block diagram illustrating a system for interworking data between blockchains according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The following describes the embodiments of the present invention further with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The following describes a method, a system and an electronic device for data intercommunication among blockchains according to an embodiment of the invention with reference to the accompanying drawings.
Fig. 1 shows a flowchart of a data interworking method between blockchains provided by an embodiment of the present invention, and as shown in fig. 1, the data interworking method between blockchains provided by the embodiment of the present invention includes the following steps:
s101: the first adaptation tool listens for transactions of the first blockchain, wherein the first adaptation tool adapts with the first blockchain.
S102: the first adapting tool determines that the transaction of the first blockchain is the transaction triggering the intercommunication of the second blockchain, and invokes a preset relay service to map the content of the transaction of the first blockchain into the transaction construction content of the second blockchain.
In a specific example, the first adaptation tool may invoke a listening-to-query service provided by the relay service to determine whether the transaction is a transaction that triggers second blockchain interworking; if the transaction of the first blockchain is determined to be the transaction triggering the second blockchain intercommunication, further calling a transaction checking service provided by the relay service, and acquiring parameters of the transaction construction content required to be mapped into the second blockchain from the content of the transaction of the first blockchain, so that the relay service maps the parameters into the transaction construction content of the second blockchain according to a preset mapping contract.
S103: the second adaptation tool obtains a transaction of the second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service, and the second adaptation tool is adapted with the second blockchain.
The second adapting tool obtains the transaction of the second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service, and specifically comprises the steps that the second adapting tool receives the trigger service determined by the relay service according to the monitoring pair; and obtaining a transaction of the second blockchain executed by the second blockchain according to the transaction construction content, and initiating the transaction of the second blockchain to the second blockchain.
According to the data intercommunication method among the blockchains, when the blockchains conduct transaction, for example, the transaction initiated by the first blockchain to the second area block, the content of the transaction of the first blockchain can be mapped into the transaction construction content of the second blockchain through the relay service, so that the second blockchain executable transaction of the second blockchain is obtained, and further, the data intercommunication among the blockchains, for example, the intercommunication of service data, is completed. When the method is used for realizing the intercommunication among the blockchains, excessive reconstruction of the blockchains of the two intercommunication parties is not needed, and the adaptation process is completed only through the relay service, so that the method has the advantages of convenience, simplicity and reliability in the data intercommunication of the blockchains, and the reconstruction cost is reduced.
The actions and functions of the first adapting tool, the second adapting tool, and the relay service provided in the inter-blockchain data interworking method according to the embodiment of the present invention are described in detail below.
The relay service may be a relay service provided by a third party, such as a blockchain built by the third party, which is called a relay chain.
The first blockchain is exemplified by a large blockchain service platform, and a second blockchain which needs to be transacted with the first blockchain is called a side chain, so that functions of transaction collection, transaction conversion, transaction transmission and the like are provided in the relay service.
For transaction collection, when the transaction occurrence direction is the transaction initiated by the large blockchain service platform to the side chain, the relay service can provide the transaction function of monitoring the large blockchain service platform, and send out the transaction of the side chain according to the condition to complete the side chain intercommunication; when the transaction occurrence direction is the transaction initiated by the side chain to the large-scale blockchain service platform, the relay service can monitor the transaction of the side chain as well and send out the transaction of the large-scale blockchain service platform according to the condition so as to complete the intercommunication of the large-scale blockchain service platform.
Thus, the relay service may provide the functionality to monitor, collect large blockchain service platforms and transactions for all side chains.
For transaction conversion, because the relay service needs to connect the large-scale blockchain service platform and the side chains in series, the relay service provides transaction conversion work among different blockchains for how the transaction of the large-scale blockchain service platform triggers the transaction of the side chains and for how the transaction of the side chains triggers the transaction of the large-scale blockchain service platform.
When the large-scale blockchain service platform initiates a transaction to the side chain, a transaction conversion program is prestored in the relay service when a specific transaction of the large-scale blockchain service platform occurs, and the transaction conversion program can acquire the construction content of the transaction triggering the side chain intercommunication through the transaction conversion program according to the content of the transaction of the large-scale blockchain service platform.
Likewise, when a side chain initiates a transaction to a large blockchain service platform, the relay service can also acquire the construction content of the transaction triggering the intercommunication of the large blockchain service platform when the specific transaction of the side chain occurs.
In the above description, a specific transaction refers to a transaction of a transaction type or a transaction condition of a large blockchain service platform, which can trigger side-chain communication, that is: triggering a transaction of second blockchain intercommunication; or the side-chain can trigger the side-chain communication transaction type or the transaction of the transaction condition, namely: a transaction of first blockchain interworking is triggered.
For transaction transmission, the relay service may provide transaction transmission work of the target chain. Wherein, if the first blockchain initiates a transaction to the second blockchain, the target chain is the second blockchain and the source chain is the first blockchain, otherwise, the target chain is the first blockchain and the source chain is the second blockchain.
In order to complete the interworking of the blockchain, the relay service needs to trigger the transaction call of the target chain after monitoring the transaction of the source chain and performing transaction conversion adaptation.
Specifically, when the large blockchain service platform calls the side chain, the relay service monitors the specific transaction of the large blockchain service platform, then performs transaction conversion adaptation to obtain the construction content of the side chain transaction which should occur, and the relay service needs to call the transaction of the side chain, complete the transaction according to the construction content and synchronize to the side chain.
When the side chain is called to the large-scale blockchain service platform, the relay service monitors the specific transaction of the side chain, then carries out transaction conversion adaptation to obtain the construction content of the transaction of the large-scale blockchain service platform, and the relay service needs to call the transaction of the large-scale blockchain service platform, complete the transaction according to the construction content and synchronize to the large-scale blockchain service platform.
In addition, the relay service may also provide a recording function, and thus, the method further includes: the relay service records the contents of the transaction of the first blockchain and records the transaction construct contents mapping the contents of the transaction of the first blockchain to the second blockchain.
Further, the recorded content also includes a result of execution of the transaction, for example, the method further includes: the relay service obtains an execution result of the second blockchain executing the transaction of the second blockchain through the second adapting tool; determining whether the transaction of the second blockchain is successful according to the execution result; if the transaction fails, constructing a recall transaction, and submitting the recall transaction to the first blockchain through the first adaptation tool so that the first blockchain performs transaction rollback; if the transaction is successful, a confirmation is submitted to the first blockchain through the first adaptation tool so that the first blockchain confirms the transaction.
In the above example, determining whether the transaction of the second blockchain was successful based on the execution result includes: judging whether the execution result meets a preset condition or not; if not, determining that the transaction fails, otherwise, determining that the transaction is successful. The predetermined condition will be described in detail later.
The relay service records a mapping relation between the transaction content of the source chain and the transaction content or the construction content of the target chain, records an execution result of the transaction of the target chain, and provides a service for acquiring the transaction result of the target chain.
In order for transactions to occur atomicity in blockchain interworking, when the execution of a transaction triggered in the target chain fails, it is necessary for the relay service to snoop for acquisition and notify the source chain (e.g., the first blockchain) to rollback.
When the large-scale blockchain service platform initiates a transaction to a side chain, the transaction content of the large-scale blockchain service platform is recorded in a relay service, when the transaction of the side chain is triggered, the relay service acquires the transaction content of a target chain, requests a transaction execution result of the target chain according to the side chain intercommunication registration information, and after acquiring the transaction execution result, the relay service calls the transaction of the target chain to inform a source chain to submit or roll back.
In one embodiment of the present invention, the following requirements should be generally satisfied by functions such as transaction conversion adaptation in a relay service:
(1) In the relay service, various adaptation functions capable of providing the difference are required, such as a transaction adaptation program of a large-scale blockchain service platform and an ethernet side chain, a transaction adaptation program of a large-scale blockchain service platform and an EOS side chain, and the like.
(2) The method can detect whether the transaction type and the transaction content of the source chain meet the side chain intercommunication condition or not in the process of intercommunication between the large-scale blockchain service platform and the side chain. Namely: the trade conversion adapting program needs to provide the function of condition judgment to screen trade.
(3) When the large-scale blockchain service platform initiates transaction to the side chain, the transaction content of the side chain can be completed by configuring according to the transaction content of the large-scale blockchain service platform; similarly, when the side chain initiates a transaction to the large-scale blockchain service platform, the side chain can be configured according to the transaction content of the side chain to complete the transaction content of the large-scale blockchain service platform. Wherein, the mapping of transaction contents can be configured according to the need, namely: the transaction content to be mapped can be configured as needed.
(4) When the transaction content of the large blockchain service platform or the side chain changes, the mapping logic (such as a mapping program) can be updated correspondingly.
Therefore, the flow of the configurable mapping procedure of the present invention is approximately:
1. the transaction of the source chain is obtained by monitoring by the relay service, and transaction shielding is carried out. Namely: and judging conditions such as transaction types, transaction parameters and the like, wherein the call times of the relay service can be effectively reduced by conducting transaction shielding.
2. And selecting a corresponding relay service mapping program according to the transaction trigger of the source chain and the target chain of the relay service registration.
3. The relay service receives the transactions sent by the screened source chain.
4. In the mapping program of the relay service, firstly, checking the condition, and filtering out the transactions which do not meet the condition; mapping of transaction information is then performed, for example: mapping the transaction parameters of the source chain into the transaction parameters of the target chain according to the configured logic; and finally, obtaining the transaction construction content of the target chain through mapping.
5. The relay service transmits the transaction construction content of the target chain to an adaptation tool of the target chain, and the adaptation tool of the target chain forms the transaction of the target chain according to the transaction construction content.
The first adapting tool and the second adapting tool are described in detail below, wherein the first adapting tool and the second adapting tool are collectively referred to as adapting tools.
Because the technology implementation, transaction format, transmission transaction mode, etc. of the different underlying blockchains are different, if the interfacing of the different underlying blockchains is put in the relay service, the relay service becomes difficult to maintain and may require frequent upgrades. Thus, in one embodiment of the present invention, work on the relay service is reduced by an adaptation tool designed on top of the relay service based on the actual requirements of the blockchain platform implemented by the different underlying technologies.
Specifically, the blockchain technologies of various architectures have their own associated developer tools, such as Fabric with corresponding Fabric-sdk tools, ethernet with corresponding web3.js tools, etc. The adaptation tool designed in the embodiment of the invention shows that the adaptation tool is modified based on a developer tool matched with a blockchain platform, and the requirements of blockchain intercommunication can be completed by providing the following adaptation tools:
(1) Listening for source chain transactions. The transactions of the source chain are listened to. The adaptation tool is needed to correspond to a corresponding blockchain, such as sdk tool (i.e. corresponding adaptation tool) of the large blockchain service platform.
(2) And (5) screening the trade of the source chain. Dynamically screening the transaction obtained by monitoring the transaction to obtain the transaction of inter-blockchain intercommunication, and shielding the transaction of inter-blockchain intercommunication without carrying out. In a specific example, dynamic screening is performed, and the adaptation tool matched with the blockchain platform is modified as least as possible, so that dynamic screening rules or logic can be provided by the relay service, and the adaptation tool can acquire a screening result only by calling the relay service.
(3) And calling the relay service. And after transaction screening, obtaining the transaction of inter-blockchain intercommunication, calling a relay service, and processing by the relay service.
(4) A transaction of the target chain is initiated. And providing an interface or a service for a relay service to call, and after the relay service is called, delivering the transaction data to an adaptation tool of a target chain, wherein the adaptation tool of the target chain initiates the transaction call.
(5) Query the target chain for transactions. The transaction of the query target chain includes query transaction content and execution results of the query transaction. The transaction of querying the target chain is mainly to provide service for the relay service.
(6) Callback transactions of the source chain are performed. And providing an interface or a service for a relay service to call, and after the relay service calls, notifying an execution result of the transaction of the side chain to a source chain, wherein the source chain submits or rolls back.
It should be noted that, for a blockchain platform without a matching adaptation tool, the development of the corresponding adaptation tool may be performed in advance.
The method for data interworking between blockchains according to the embodiment of the present invention is described in detail below.
In this example, the relay service is implemented through a relay chain. Namely: and (5) self-building a relay chain.
The self-built relay chain is to complete the requirement of intercommunication of block chains (such as source chain and target chain) by customizing a brand new block chain as the relay chain.
For example, the optimized Chief frame is improved based on the Tendermint frame to quickly complete the creation of a relay chain, chain logic of mapping management of large-scale blockchain service platforms and side chain communication is realized in the relay chain, dynamic Lua code management is integrated or a contract engine is integrated to complete dynamic configuration mapping function, and finally, transformation of adaptation tools for adapting different bottom-layer blockchain platforms is completed.
Before the communication interaction between the large-scale blockchain service platform and the side chain is carried out by using the relay chain, the large-scale blockchain service platform and the side chain trust the relay chain, and all or part of nodes of the large-scale blockchain service platform and the side chain are added to form the relay chain. The method comprises the following steps:
Relay chain trust: large blockchain service platforms and side-chain trusted relay chains. In the alliance chain scene application, it can be assumed that the large-scale blockchain service platform and the side chain trust the node of the relay chain.
Transaction call trust: in the process of intercommunication between a large-scale blockchain service platform and a side chain, the transaction trigger of a target chain needs to be initiated by a node, and the large-scale blockchain service platform and the side chain need to trust the side chain intercommunication transaction initiated by the node, for example: trust needs to be increased.
The node comprises: and all or part of nodes of the large-scale blockchain service platform and the side chains are added to form a relay chain. That is, at least one node of the large-scale blockchain service platform is a node of the relay chain, at least one node of the side chain is a node of the relay chain, and the nodes can send transaction calls on the respective chains.
In the network structure of the scheme of the relay chain, the node intersection of the large-scale block chain service platform and the side chain is a node of the relay chain, as shown in fig. 2.
In a specific example of the present invention, configurable mapping large blockchain service platforms and side chain transactions are implemented through smart contracts.
In particular, a configurable mapping setting smart contract typically meets the following requirements:
(1) The contract address needs to map with the listening pair (e.g., communication both party chain ID and triggered transaction type, such as "large blockchain service platform ID, ethernet ID, testchaincode") and provide transaction result check record, check frequency and timeout settings for the target chain, such as: the relay chain obtains the transaction execution result of the target chain, but because the underlying blockchain platforms of the target chain are different, the transaction confirmation time may be different, so the manner of generating the blockchain height of the relay chain is converted, for example, 6 blockchain heights check the target chain once and 60 blockchain heights are overtime.
(2) The contract provides a transaction checking method, wherein parameters are transaction contents of a source chain, and the method outputs whether the transaction meets the conditions, namely: whether or not a transaction triggers side-chain interworking.
(3) The contract provides a transaction mapping method, parameters are transaction contents of a source chain, and the method outputs transaction construction contents of a target chain;
(4) The contract provides a method for recording transaction pairs, records the source chain triggering transaction content and the transaction content of the target chain for executing the transaction, and records the transaction execution result of the target chain, and checks the information of block height and the like next time.
(5) The contract provides a recall transaction construction method, parameters are transaction pairs, and the method outputs recall transaction construction content which is a source chain.
In the above description, the transaction pair is provided by link logic built in the relay link as follows:
(1) Before the large-scale blockchain service platform communicates with the side chain, communication registration is performed in the relay chain in advance, and IDs of a source chain and a target chain and a trigger transaction type for triggering communication release are provided, namely: transaction types can be flexibly defined, such as a block chain platform with Fabric as a bottom layer, and the transaction types are chain code names; and the transaction type in the contract call is a contract address and the like.
(2) When the large-scale block chain service platform registers with a side chain, the transaction result checking frequency and the overtime setting of the target chain are provided, and the frequency and the overtime are highly anchored by the relay chain block.
(3) The relay chain stores the monitoring pair information in the state of the relay chain and provides all effective monitoring pair inquiry to the outside.
(4) The relay chain will provide a snoop pair failure function.
(3) The relay chain will obtain the execution result of the transaction of the target chain according to the height of the designated block.
In connection with the above description, the overall implementation procedure of the data interworking method between blockchains in the embodiment of the present invention is shown in fig. 3. The method specifically comprises the following steps:
An adaptation tool of a source chain (such as an adaptation tool of the source chain) monitors the transaction of the current chain, calls monitoring pair query service provided by a relay chain, and initially screens out the transaction conforming to side chain communication;
the adaptation tool of the source chain takes the transaction content as a parameter according to the monitoring pair, invokes a transaction checking method of the relay chain, filters the transaction, and reserves the transaction capable of triggering side chain intercommunication;
the adaptation tool of the source chain (such as the adaptation tool of the target chain) takes the filtered transaction content as a parameter, and invokes a transaction mapping method of the corresponding relay chain according to the corresponding monitoring pair;
the relay chain executes corresponding monitoring pair contracts, transaction contents are taken as parameters, transaction construction contents of corresponding target chains are obtained through contract execution, and it is noted that the transaction construction contents are not transaction of the target chains, but the adaptation tools of the target chains need to construct the transaction contents;
the relay chain acquires the address of the transaction triggering service (such as the transaction initiating service of the target chain) of the monitoring pair by reading the node configuration information, and automatically invokes the node triggering service. If the node configuration does not have the information of the current monitoring pair, representing that the current node has no service of the target chain;
The adaptation tool of the target chain receives the node triggering service call of the relay chain, constructs the target chain transaction according to the transaction construction content given by the relay chain, initiates the transaction, and returns the transaction content to the relay chain;
the relay chain records the transaction content of the source chain and the transaction content of the target chain (namely transaction pair information), and obtains transaction result checking configuration according to side-chain intercommunication registration information;
the relay chain requests the transaction result of the target chain according to the blockchain height and the transaction content, and invokes an adaptation tool of the target chain to inquire the transaction result, if the transaction result is still obtained in a method within the overtime blockheight, the transaction is considered as a transaction failure;
the relay chain will execute the recall transaction construction method, construct the source chain recall transaction, and inform the source chain side chain intercommunication transaction execution result. And further, data intercommunication among the block chains is completed.
It will be appreciated that the above description takes a self-built relay chain as an example, but the implementation also requires the help of corresponding adapting tools.
The adaptation tool that concretely needs to realize includes: adapting means for a source chain and adapting means for a target chain.
Taking two-way intercommunication of a large-scale blockchain service platform and an Ethernet alliance chain as an example, two scenes exist, namely, the large-scale blockchain service platform triggers the Ethernet alliance chain transaction; the Ethernet alliance chain triggers the transaction of the large-scale blockchain service platform.
The adaptation tool of the large-scale block chain service platform is completed through reconstruction and development by fabric-sdk; the adaptation tool of the Ethernet alliance chain is completed through modification and development of the web 3.
In the transaction of triggering the ethernet alliance chain by the large blockchain service platform, an adaptation tool of the large blockchain service platform needs to provide: transaction monitoring program of large-scale block chain service platform, transaction screening program of large-scale block chain service platform and call back transaction calling program of large-scale block chain service platform; the adaptation tool of the ethernet alliance chain needs to provide: a transaction calling program of the Ethernet alliance chain and a transaction result inquiring program of the Ethernet alliance chain.
In the transaction of the large-scale blockchain service platform triggered by the Ethernet alliance chain, an adaptation tool of the Ethernet alliance chain needs to be provided with: a transaction monitor program of an Ethernet alliance chain, a transaction screening program of the Ethernet alliance chain and a callback transaction calling program of the Ethernet alliance chain; the adaptation tool of the large blockchain service platform needs to provide: transaction calling program of large-scale block chain service platform and transaction result inquiring program of large-scale block chain service platform.
Of course, to ensure the versatility of the method of the embodiments of the present invention, the method may provide the following solutions:
Repeat transaction problem: the relay chain triggers the transaction call of the target chain, the transaction is submitted by the adaptation tool of the node, the node with a plurality of target chains in the relay chain can appear that a plurality of nodes simultaneously submit the transaction, and the method uses the same nonce (the blockchain platform of the Ethernet) or the transactionId (the Fabric type blockchain platform), so that the transaction is repeated.
The embodiment of the invention solves the problem of repeated transactions by limiting the transactions submitted by the target chain nodes: when there are multiple nodes of the target chain in the relay chain, only the designated node is allowed to submit the transaction by configuration, and other nodes can only check the transaction.
Trust problem: the multi-party trust problem of the relay chain is mainly included; trust problem of side-chain communication transactions.
The multi-party trust problem of the relay chain can be avoided in the business level and the cooperation level outside the blockchain in the alliance chain scene.
The trust problem of the side chain communication transaction mainly refers to the side chain intercommunication transaction and transaction parameters initiated by a trust node of the current chain, more source chains and target chains are added to the relay chain at present to become relay chain nodes, and the relay chain nodes serve as check nodes for checking the transaction parameters.
Setting a checking problem: if there is an error in the registration, contract, or configuration information of the relay link point, the side chain communication will be problematic. With respect to the overall inspection of the flow configuration and the like, the inspection will be performed by introducing an automated inspection program.
Transaction execution atomicity problem: in a distributed system, ensuring atomicity of transaction execution may use a two-phase commit protocol (2 PC), as the relay chain is responsible for relaying transactions, the specific implementation of preparation and commit needs to be implemented by the business chain.
Relay link timeout problem: if the target chain is blocked, after the relay chain block height is overtime, the transaction is still not executed, and the whole side chain intercommunication transaction ends in failure, but after the problem of blocking is solved, the target chain still can execute the side chain intercommunication transaction, so that the side chain intercommunication failure is caused.
According to the inter-blockchain data intercommunication method, conversion, adaptation, transmission and the like of inter-blockchain transactions are completed through the relay chain, adaptation can be performed by modifying the chain logic of the relay chain, and the inter-blockchain data intercommunication method has the advantage of high customization. In addition, the blockchain built by using the Chief framework can be operated by only one executable file and simple configuration modification, and the side chain operator does not increase much operation and maintenance pressure.
In another embodiment of the present invention, the relay service may also be implemented by a large blockchain service platform in combination with intelligent contracts.
For example: the large-scale block chain service platform combines the mode of intelligent contract, and a new communication chain is built by using the large-scale block chain service platform framework. The communication link is used as a medium for communication between the large-scale blockchain service platform and the side chain, and the configurable custom mapping is completed by using the intelligent contract.
It should be noted that, in the manner of combining the large blockchain service platform with the intelligent contract, for example, the functions provided in the relay chain (such as monitoring logic for registration) are used, and the large blockchain service platform is implemented by the intelligent contract.
FIG. 4 is a block diagram of a system for interworking data between blockchains in accordance with an embodiment of the present invention. As shown in fig. 4, the inter-blockchain data interworking system according to an embodiment of the present invention includes: a first adaptation tool 410, a relay 420 and a second adaptation tool 430.
The first adapting tool 410 is configured to monitor a transaction of the first blockchain, and when determining that the transaction is a transaction triggering the second blockchain intercommunication, invoke a preset relay service in the relay 420 to map a content of the transaction to a transaction construction content of the second blockchain. The second adapting tool 430 obtains a transaction of the second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service; wherein a first adaptation tool 410 is adapted to the first blockchain and a second adaptation tool 430 is adapted to the second blockchain.
In one embodiment of the invention, the first adaptation tool 410 is used to: invoking a monitoring pair query service provided by the relay service to determine whether the transaction is a transaction triggering second blockchain intercommunication; if yes, further calling a transaction checking service provided by the relay service, and acquiring parameters of the transaction construction content required to be mapped into the second blockchain from the transaction content of the first blockchain, so that the relay service maps the parameters into the transaction construction content of the second blockchain according to a preset mapping contract.
According to the inter-blockchain data intercommunication system, when the blockchains conduct transactions, for example, the first blockchain initiates the transactions to the second area block, the contents of the transactions of the first blockchain can be mapped into the transaction construction contents of the second blockchain through the relay service, so that the transactions of the second blockchain executable by the second blockchain are obtained, and further, the inter-blockchain data intercommunication, for example, the intercommunication of business data, is completed. When the method is used for realizing the intercommunication among the blockchains, excessive reconstruction of the blockchains of the two intercommunication parties is not needed, and the adaptation process is completed only through the relay service, so that the method has the advantages of convenience, simplicity and reliability in the data intercommunication of the blockchains, and the reconstruction cost is reduced.
It should be noted that, the specific implementation manner of the inter-blockchain data interworking system in the embodiment of the present invention is similar to the specific implementation manner of the inter-blockchain data interworking method in the embodiment of the present invention, and please refer to the description of the method section specifically, so that redundancy is reduced and redundant description is omitted.
Based on the same inventive concept, a further embodiment of the present invention discloses an electronic device, see fig. 5, which specifically includes the following: a processor 501, a memory 502, a communication interface 503, and a communication bus 504;
Wherein the processor 501, the memory 502, and the communication interface 503 perform communication with each other through the communication bus 504; the communication interface 503 is used for implementing information transmission between devices;
the processor 501 is configured to invoke a computer program in the memory 502, where the processor executes the computer program to implement all the steps of the data interworking method between blockchains, for example, a first adapting tool listens for a transaction of a first blockchain, where the first adapting tool adapts to the first blockchain; the first adapting tool determines that the transaction is a transaction triggering the second blockchain intercommunication, and calls a preset relay service to map the content of the transaction into the transaction construction content of the second blockchain; and the second adaptation tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service, and the second adaptation tool is adapted with the second blockchain.
Based on the same inventive concept, a further embodiment of the present invention provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements all the steps of the above-described inter-blockchain data interworking method, for example, a first adaptation tool listens for a transaction of a first blockchain, wherein the first adaptation tool adapts to the first blockchain; the first adapting tool determines that the transaction is a transaction triggering the second blockchain intercommunication, and calls a preset relay service to map the content of the transaction into the transaction construction content of the second blockchain; and the second adaptation tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service sent by the relay service, and the second adaptation tool is adapted with the second blockchain.
Further, the logic instructions in the memory described above may be implemented in the form of software functional units and stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment of the invention. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on such understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the index monitoring method described in the respective embodiments or some parts of the embodiments.
Furthermore, in the present disclosure, such as "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method of data interworking between blockchains, comprising:
a first adaptation tool listens for transactions of a first blockchain, wherein the first adaptation tool adapts to the first blockchain;
the first adapting tool determines that the transaction is a transaction triggering second blockchain intercommunication, and invokes a preset relay service to map the content of the transaction into transaction construction content of a second blockchain;
the second adaptation tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to the trigger service call sent by the relay service, and the second adaptation tool is adapted to the second blockchain;
The first adapting tool determines that the transaction is a transaction triggering second blockchain intercommunication, invokes a preset relay service to map the content of the transaction to the transaction construction content of the second blockchain, and comprises the following steps:
the first adapting tool invokes a monitoring-to-querying service provided by the relay service to determine whether the transaction is a transaction triggering second blockchain intercommunication; if yes, further calling a transaction checking service provided by the relay service, and acquiring parameters of transaction construction contents required to be mapped into a second blockchain from the transaction contents of the first blockchain, so that the relay service maps the parameters into the transaction construction contents of the second blockchain according to a preset mapping contract;
the second adapting tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to a trigger service call sent by the relay service, and the second adapting tool comprises:
the second adapting tool receives the trigger service determined by the relay service according to the monitoring pair; and obtaining a transaction of a second blockchain executed by the second blockchain according to the transaction construction content, and initiating the transaction of the second blockchain to the second blockchain.
2. The method of inter-blockchain data interworking of claim 1, further comprising:
the relay service records the contents of the transaction of the first blockchain and records the transaction construction contents mapping the contents of the transaction of the first blockchain to the second blockchain.
3. The method of inter-blockchain data interworking of claim 1, further comprising:
the relay service obtains an execution result of the second blockchain executing the transaction of the second blockchain through the second adapting tool;
determining whether the transaction of the second blockchain is successful according to the execution result;
if the transaction fails, constructing a recall transaction, and submitting the recall transaction to the first blockchain through the first adaptation tool so that the first blockchain executes transaction rollback;
if the transaction is successful, a confirmation is submitted to the first blockchain through the first adaptation tool for the first blockchain to confirm the transaction.
4. The method of inter-blockchain data interworking as in claim 3, wherein the determining whether the transaction of the second blockchain is successful based on the execution result comprises:
Judging whether the execution result meets a preset condition or not;
if not, determining that the transaction fails, otherwise, determining that the transaction is successful.
5. A system for interworking data between blockchains, comprising: a first adapting means, a relay and a second adapting means, wherein,
the first adapting tool is used for monitoring the transaction of the first blockchain, wherein when the transaction is determined to be the transaction triggering the second blockchain intercommunication, a preset relay service in the relay is called to map the content of the transaction to the transaction construction content of the second blockchain;
the second adapting tool obtains a transaction of a second blockchain executed by the second blockchain based on the transaction construction content according to a trigger service sent by the relay service;
the first adapting tool is specifically configured to: invoking a monitoring pair query service provided by the relay service to determine whether the transaction is a transaction triggering second blockchain intercommunication;
if yes, further calling a transaction checking service provided by the relay service, and acquiring parameters of transaction construction contents required to be mapped into a second blockchain from the transaction contents of the first blockchain, so that the relay service maps the parameters into the transaction construction contents of the second blockchain according to a preset mapping contract;
The second adapting tool is specifically configured to: receiving the trigger service determined by the relay service according to the monitoring pair; obtaining a transaction of a second blockchain executed by the second blockchain according to the transaction construction content, and initiating the transaction of the second blockchain to the second blockchain;
wherein the first adaptation tool is adapted with the first blockchain and the second adaptation tool is adapted with the second blockchain.
6. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements a method of interworking data between blockchains according to any of claims 1 to 4 when the computer program is executed by the processor.
7. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements a method of inter-blockchain data interworking according to any of claims 1 to 4.
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| CN112688934B (en) * | 2020-12-21 | 2022-07-19 | 杭州云象网络技术有限公司 | Contract calling method and system based on intelligent gateway and contract engine |
| CN112598524B (en) * | 2021-02-26 | 2021-06-22 | 北京全息智信科技有限公司 | Processing method and device for conditional block chain transaction and electronic equipment |
| CN114239039A (en) * | 2021-09-30 | 2022-03-25 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for dynamically adapting data structure on user-defined block chain |
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