WO2020042931A1

WO2020042931A1 - Public chain-based transaction method and blockchain system

Info

Publication number: WO2020042931A1
Application number: PCT/CN2019/101048
Authority: WO
Inventors: 白杰; 吴先锋; 李冬云
Original assignee: 白杰
Priority date: 2018-08-28
Filing date: 2019-08-16
Publication date: 2020-03-05

Abstract

The present application provides a public chain-based transaction method and a blockchain system. The method comprises: a transaction initiation chain initiating a query transaction with respect to a public chain; the public chain querying a transaction target chain accessing a public chain network, and returning transaction target chain information matching service type information; the transaction initiation chain initiating a service transaction with respect to the public chain according to a transaction method and a transaction condition required by the transaction target chain; the public chain transmitting the service transaction to the transaction target chain; after verifying that the transaction condition is acceptable, the transaction target chain returning service content to the public chain according to the received service transaction; and the public chain transmitting the service content to the transaction initiation chain, so as to complete a cross-chain transaction. In the method, a public chain network queries and transmits a service transaction, such that a transaction initiation chain acquires service content of a transaction target chain, so as to complete a cross-chain transaction between different chain networks, thereby widening an application range of a blockchain-based transaction method.

Description

Public chain-based transaction method and blockchain system

This application requires the submission of the China Patent Office on August 28, 2018, application number 201810986825.3, and the invention name as "Blockchain Standard Application Model and Application Method", and on December 7, 2018, the China Patent Office, The priority of a Chinese patent application with application number 201811496855.2 and invention name "public chain-based transaction method and blockchain system" is incorporated herein by reference in its entirety.

Technical field

This application relates to the field of blockchain technology, and in particular, to a public chain-based transaction method and a blockchain system.

Background technique

Blockchain technology is a decentralized system idea that can create a relatively objective anti-repudiation digital environment through public consensus. Blockchain technology can ensure that network information cannot be changed once it is released. For example, if a transaction occurs in the blockchain network, nodes in the blockchain network will record the content of the transaction in the generated block, and Block data is broadcast throughout the network, and other nodes in the network store the block data synchronously or asynchronously to form an unchangeable blockchain.

Among them, the transaction has a broad meaning and does not refer to "commodity sale" or "item exchange" in the traditional sense, but refers to the content or operation result of a certain type or data on the blockchain network, for example, on the network On a certain blockchain node A, a query request a for the performance of a certain type of communication equipment is initiated, and the query request a is a transaction for the blockchain node B that undertakes the query service. Similarly. It is also a transaction that the node B sends the performance table b of the communication device of the model obtained to the node A to the node A. Information A, a and information B, b as transaction information will be written into the data block of the blockchain.

Existing blockchain-based transaction methods can only be limited to the same blockchain network, that is, transactions between nodes in the blockchain network, and each blockchain network uses a unique virtual Currency as a medium of transaction. For example, the Bitcoin-based transaction method is only applicable to the Bitcoin blockchain network, and Bitcoin is used as a transaction virtual currency; the Etherum-based transaction method is only applicable to the Ethereum blockchain network, Ethereum As a trading virtual currency. With the development of blockchain network technology, more and more blockchain networks have been established, such as industry chains, alliance chains, private chains, etc., to achieve practical applications in specific fields.

It can be seen that the existing blockchain networks are basically independent of each other, and there is no unified and effective mechanism for communication and interaction between different chains. Each type of blockchain can provide different capability sets due to different application scenarios. The endogenous nature of the blockchain network determines that the capability sets provided by different chains cannot be interconnected, which results in an island effect of data and applications and limits Application based on blockchain transaction method.

Summary of the Invention

This application provides a public chain-based transaction method and a blockchain system to solve the problem that traditional transaction methods do not support cross-chain transactions and limit the application of blockchain-based transaction methods.

In one aspect, this application provides a public chain-based transaction method, including:

The transaction initiation chain initiates a query transaction containing service type information to the public chain;

The public chain queries the transaction target chain connected to the public chain network according to the service type information in the query transaction;

The public chain returns the transaction target chain information that matches the service type information to the transaction initiation chain. The transaction target chain information includes the target chain address, transaction method, and transaction conditions.

The transaction initiation chain initiates service transactions to the public chain according to the transaction method and transaction conditions;

The public chain transfers service transactions to the transaction target chain;

The transaction target chain verifies the transaction conditions and returns the service content to the public chain according to the received service transaction after the verification is qualified;

The public chain delivers service content to the transaction initiation chain.

Optionally, the steps of the transaction initiation chain initiating a query transaction containing service type information to the public chain include:

The transaction nodes in the transaction initiation chain generate transaction requests based on the actual transaction information;

The transaction node broadcasts the transaction request in the transaction initiation chain to form a blockchain bookkeeping that conforms to the transaction initiation chain;

The checkout node validates the transaction request and packages it into block data;

The bookkeeping node broadcasts the block data to other nodes and initiates query transactions to the maintenance nodes in the public chain. The smart contracts provided by the public chain include smart contracts created by the public chain and public smart contracts.

Optionally, before the step of the transaction initiation chain initiating a query transaction including service type information to the public chain, the method further includes:

The public chain initiates contract verification information to the blockchain network of the accessed public chain network to verify whether the accessed blockchain network supports the smart contract provided by the public chain;

The public chain sets a contract judgment label for the connected blockchain network according to the verification result of whether the smart contract is supported, including: setting a contract judgment label for the corresponding interface node of the accessed blockchain network; or, for the accessed block The chain network address sets the contract judgment label.

Optionally, after the public chain returns the transaction target chain information that conforms to the service type information to the transaction initiation chain, if both the transaction initiation chain and the transaction target chain support the interface specifications agreed by the public chain, the method can also pass the following steps Return the service content to the transaction initiation chain:

The transaction initiation chain initiates service transactions directly to the transaction target chain according to the transaction method and transaction conditions;

The transaction target chain verifies the transaction conditions, and returns the service content to the transaction initiation chain according to the received service transaction after the verification is qualified;

After the transaction initiation chain and the transaction target chain complete the transaction, the transaction summary is synchronized to the public chain.

Optionally, the step of initiating a query transaction including service type information in the transaction initiation chain to the public chain further includes:

The public chain judges whether the transaction initiation chain supports smart contracts;

If the transaction initiation chain does not support smart contracts, create a smart contract for the transaction initiation chain through the public chain, or configure a public smart contract for the transaction initiation chain;

The public chain determines the addresses corresponding to the transaction initiation chain and the transaction target chain according to the smart contract or public smart contract.

Optionally, the transaction conditions include the number of transaction tokens designated by the transaction target chain, and before the step of the transaction initiation chain initiating a service transaction to the public chain according to the transaction conditions, the method further includes:

Determine whether the number of STOs owned by the transaction initiation chain meets the number of STOs specified by the transaction target chain;

If the number of STOs owned by the transaction initiation chain meets the number of STOs specified by the transaction target chain, the transaction initiation chain is allowed to initiate service transactions to the public chain;

If the number of STOs owned by the transaction initiation chain does not satisfy the number of STOs specified by the transaction target chain, send a prompt message to the transaction initiation chain and continue to query other transaction target chains connected to the public chain network according to the service type.

Optionally, the step of the transaction initiation chain initiating a service transaction to the public chain according to the transaction conditions includes: the transaction initiation chain creates a transfer transaction on the public chain to trigger the execution of the contract, and the transfer transaction includes a designated transaction certificate payment to the transaction target chain Quantity.

Optionally, the steps of the public chain transmitting service transactions to the transaction target chain include:

The public chain locks the transfer transaction and initiates a request transaction to the transaction target chain according to the transfer transaction;

The transaction target chain provides return transaction results to the public chain according to the transaction request;

The public chain verifies the return transaction result. If the return transaction is consistent with the transfer transaction, the lock status of the transfer transaction is released;

The public chain transfers the payment of the transaction initiation chain to the transaction target chain, and transfers the service content to the transaction initiation chain.

Optionally, after the public chain queries the transaction target chain connected to the public chain network, the method further includes:

The public chain judges whether the transaction initiation chain and the transaction target chain support transactions directly through the Zhengtong of the public chain;

If the transaction initiation chain and / or the transaction target chain do not support transactions directly through the Zhengtong of the public chain, convert the securities in the transaction initiation chain and / or the parallel chain corresponding to the transaction target chain;

The parallel chain corresponding to the transaction initiation chain initiates service transactions to the public chain, and the parallel chain corresponding to the transaction target chain returns service content to the public chain.

On the other hand, this application also provides a public chain-based blockchain system, including: a transaction initiation chain, a public chain, and a transaction target chain; the transaction initiation chain establishes a network connection with the transaction target chain through the public chain;

The transaction initiation chain is configured to: initiate a query transaction including service type information to the public chain; and initiate a service transaction to the public chain according to the transaction conditions of the transaction target chain;

The public chain is configured to: according to the service type in the query transaction, query the transaction target chain connected to the public chain network; return the transaction target chain information corresponding to the service type information to the transaction initiation chain, and the transaction target chain information includes the target Chain address, transaction method and transaction conditions; and, passing service transactions to the transaction target chain, and passing service content to the transaction initiation chain;

The transaction target chain is configured to verify transaction conditions and return service content to the public chain according to the received service transaction after the verification is qualified.

As can be known from the above technical solutions, in actual application, the method first initiates a query transaction from the transaction initiation chain to the public chain, and then queries the transaction target chain connected to the public chain network through the public chain according to the service type information in the query transaction; In order to make the public chain return to the transaction initiation chain the transaction target chain information that conforms to the service type information; the transaction initiation chain then initiates a service transaction to the public chain according to the transaction method and transaction conditions required by the transaction target chain; After the transaction target chain verifies that the transaction conditions are qualified, the service content is returned to the public chain according to the received service transaction. Finally, the public chain passes the service content to the transaction initiation chain to complete the cross-chain transaction. The method queries and transmits service transactions through the public chain network, so that the transaction initiation chain can obtain the service content of the transaction target chain, complete cross-chain transactions between different chain networks, and increase the application scope of the blockchain-based transaction method.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solution of the present application more clearly, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, without any creative effort, Other drawings can be obtained from these drawings.

FIG. 1 is a schematic flowchart of a public chain-based transaction method of this application;

FIG. 2 is a schematic flowchart of a process of initiating a query transaction to a public chain by a transaction initiation chain of this application;

FIG. 3 is a schematic flowchart of a process for judging whether a transaction initiation chain supports a smart contract;

FIG. 4 is a schematic flowchart of a process for judging whether a transaction initiation chain and a transaction target chain support public chain token trading;

FIG. 5 is a schematic flowchart of a process for judging whether the number of transaction-initiated chain certificates meets requirements;

FIG. 6 is a schematic diagram of a transaction process when the application chain is locked for transactions;

FIG. 7 is a flowchart of a transaction when a transaction initiation chain and a transaction target chain support an interface specification agreed on by a public chain;

FIG. 8 is a schematic structural diagram of a public blockchain-based blockchain system.

detailed description

The embodiments will be described in detail below, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with some aspects of the application as detailed in the claims.

In the technical solution provided in this application, a blockchain network refers to a peer-to-peer (P2P) network with a decentralized application architecture. The blockchain network can perform distributed storage, public consensus, digital encryption, transaction accounting, and verification. That is, a trading platform that covers distributed technology, cryptography, P2P network architecture, and various consensus algorithms that may be applied. Blockchain or blockchain information refers to the accounting information generated based on transaction information when a transaction occurs in the blockchain network, that is, multiple specific transactions form a block, and multiple blocks form an ordered block. chain. Blockchain networks include nodes that establish peer-to-peer network connections with each other. Each node is configured with a corresponding consensus mechanism, such as a smart contract, and has sufficient computing power to perform transaction verification and accounting procedures. The nodes also have an interface specification that conforms to a certain unified standard to achieve access to more nodes or other types of blockchain networks through the interface specification.

In this application, the public chain, transaction initiation chain, transaction target chain, and parallel chain mentioned all refer to different blockchain networks that conform to the blockchain technology. Unless otherwise stated in this application, the public chain, the transaction initiation chain, the transaction target chain, and the parallel chain all refer to the corresponding networks, namely the public chain network, the transaction initiation chain network, the transaction target chain network, and the parallel chain network. In the technical solution provided in this application, the public chain network is used as a basic platform arranged on the entire network, and its node interfaces are connected to multiple blockchain networks, such as industry chains, alliance chains, and private chains based on public link interface specifications. Each blockchain network can serve as a development platform and provide corresponding services within its network. Among them, the definition and specification of the public chain have standard interfaces and methods to facilitate network interconnection with other blockchains, such as the transaction initiation chain and the transaction target chain. The public chain in this application has the ability to support cross-chain intermediation, as well as decentralized applications and smart contracting capabilities.

The transaction initiation chain and the transaction target chain refer to the block chain in the public chain network, that is, in this application, the public chain provides the basic platform, and the transaction initiation chain and the transaction target chain are the access networks, each with its own functions and service. The transaction initiation chain and transaction target chain can be a blockchain network based on public chain network standards and interface specifications, that is, the transaction initiation chain and transaction target chain can directly communicate with and connect to the public chain network. The transaction initiation chain and transaction target chain can also be independent networks, such as the existing blockchain network Bitcoin, Ethereum, etc., or industry chains and alliance chains developed by some industries, or even to achieve a certain service Private chains built on demand. These existing blockchains, industry chains, alliance chains, and private chains generally cannot directly trade with each other or even with the public chain network. Therefore, in this application, the public chain and other networks can be connected through parallel chains.

Parachains can be composed of some nodes in the public chain network, and through the parachains, the public chain can be bridged with other networks that cannot be directly traded. In this application, for networks that cannot be directly traded, each blockchain network corresponds to a parachain, and the parachain is set to have the complete function of the corresponding blockchain network, and can synchronize transactions in the blockchain network Transformation and transfer to the public chain network. Therefore, in the technical solution provided in this application, the parallel chain can be determined as a mirror image of the corresponding blockchain network, and for convenience of description, the corresponding blockchain network becomes the parent chain. In this application, the parachain is composed of some nodes in the public chain network, and these nodes are also nodes in the parent chain to transfer transaction information.

Based on the above components, the public chain can provide cross-chain relays in practical applications, completing transactions verification, data certification, asset transfer, and smart contract execution. The public chain's unified external interface specifications enable other blockchain networks to quickly access the public chain network. The public chain also provides the basic blockchain platform capabilities, which is to quickly complete the deployment and verification of the scheme, and to complete the distributed storage and accounting procedures in the public chain network. In addition, as a basic platform, the public chain can also provide public development functions, thereby completing the collaborative development and deployment of multiple parallel chain smart contracts at one time.

In addition to recording its own blockchain information, the public chain can also be used to store the information summary of the corresponding cross-chain transaction, that is, the transaction summary. Record the relevant content of cross-chain transactions through formatted transaction data. At the same time, in order to reduce the occupation of distributed storage space on the public chain, when the public chain records certain information, it can also record third-party blockchain information through a specific compression algorithm. By way of example, the block data formed and stored in the public chain can include the following: block identifiers (such as serial numbers, timestamps, block hash values, and previous block hash values), block ownership (that is, block producers) ), Other information of the block (such as random value, difficulty value and additional information, etc.), block weight, information summary (such as transaction tree, status tree, receipt tree, data tree, etc.), transaction costs, rewards, size, etc.

In order to achieve cross-chain transactions, a public chain-based transaction method provided in this application is shown in FIG. 1. The transaction method includes the following steps:

S1: The transaction initiation chain initiates a query transaction containing service type information to the public chain.

In the technical solution provided in this application, the transaction initiation chain determines the type of service required on the transaction initiation chain according to its own service requirements, and sends it to the public chain network by querying the transaction. Since the transaction initiation chain is also a blockchain network connected to the public chain in this application, the initiating query transaction described herein may be initiated by a node in the transaction initiation chain. After a transaction node initiates a query transaction, the transaction initiation chain network first judges the service transaction to determine whether the service transaction can be completed within the transaction initiation chain network.

If the current service transaction can be completed within the transaction initiation chain, there is no need to initiate a query transaction to the public chain network, that is, the transaction node completes the transaction between the transaction initiation chain and another node capable of providing the corresponding service type. The transaction process can form blockchain information inside the transaction initiation chain, and perform distributed storage, verification and other procedures within the transaction initiation chain. If the current service transaction cannot be completed within the transaction initiation chain, a corresponding query transaction can be generated through a smart contract in the transaction initiation chain, and the query transaction is initiated to the public chain. Obviously, the type of service required in the service transaction must be included in the initiated query transaction. In addition, for third-party blockchains that cannot directly trade with the public chain, query transactions can be passed to the public chain through parallel chains to initiate query transactions.

For example, there are five blockchain networks connected to the public chain network P, which are the blockchain networks A to E. Among them, the network B contains 100 nodes, which are denoted as B00 to B99. In practical applications, node B25 in network B needs to use 100 STOs Tb to exchange for Stoe Ta of the same value. Node B25 acts as a transaction node, which creates query transactions and forms block data as required. The query transactions include The service type is: exchange of tokens. Node B25 can broadcast query transactions in network B, that is, broadcast to other nodes, such as B24 and B26. On the one hand, other nodes in network B distribute the block data of query transactions. It can determine whether other nodes in the network B can satisfy the transaction request of the node B25, that is, whether other nodes can exchange the token pass Ta with the node B25.

If other nodes in network B cannot complete the token exchange, the query transaction needs to be broadcast to the nodes in the public chain network P, so that the nodes in the public chain network P can determine networks A, C, D, and E based on the query transaction. Whether it is possible to exchange the certificate pass Ta to the node B25.

Further, as shown in FIG. 2, the transaction initiation chain initiating a query transaction containing service type information to the public chain may further include the following steps:

S101: A transaction node in the transaction initiation chain generates transaction information according to an actual transaction;

S102: the transaction node broadcasts the transaction information in a transaction initiation chain to form a blockchain account that conforms to the transaction initiation chain;

S103: The bookkeeping node verifies the transaction and adds block data;

S104: The bookkeeping node broadcasts the block data to other nodes in the transaction initiation chain, and simultaneously initiates query transactions to the maintenance nodes in the public chain. The smart contracts provided by the public chain include smart contracts and public smart contracts created by the public chain.

From the above steps, after the transaction is generated by the transaction node, the transaction information can be broadcasted in the transaction initiation chain. According to its accounting rules, the transaction initiation chain writes the transaction information into the block data for distributed storage to form a transaction initiation. Blockchain accounting data for the chain. The block data records the actual transaction information initiated by the transaction node, such as: service type, number of transactions, transaction initiator, transaction target, hash value, etc. After broadcasting in the transaction initiation chain, the transaction nodes also add smart contract and service type information to the block data.

Still using the above-mentioned exchange service for securities exchanges as an example, after initiating an inquiry transaction, the transaction node B25 generates block data containing the exchange services, and then broadcasts the transaction information of the inquiry transactions on the network B. The specific broadcast form It can be determined according to the requirements of the broadcast form in network B. For example, the transaction node B25 can first broadcast the block data to neighboring nodes B24 and B26. The neighboring nodes B24 and B26 verify the transaction, determine whether the transaction is legal, and block Data is stored to form a blockchain. Then, the neighboring nodes B24 and B26 broadcast to their respective neighboring nodes, so that all nodes in network B can verify and store the block data, and form a complete blockchain data that complies with the accounting specifications in network B.

In this embodiment, the smart contracts provided by the public chain include smart contracts and public smart contracts created by the public chain. The smart contract information is used to enable transactions with the public chain to initiate query transactions and subsequent service transactions; service type information includes Necessary service description information, or service code information stored in the public chain network, can be used to initiate query transactions. The block data added with smart contract and service type information is broadcast to the maintenance nodes in the public chain, so as to initiate query transactions. The maintenance node in the public chain network can be the node used to provide the interface for the transaction initiation chain, or it can be another designated node. In order to facilitate the initiation of a query transaction, the computing power can be used to meet the conditions, and the node closer to the transaction initiation chain is used as a maintenance node to increase the broadcast speed of block data.

It should be noted that, in the technical solution provided in this application, the service transaction includes specific transaction content, which may be a virtual currency exchange transaction, such as the exchange of a value such as a token in the transaction initiation chain into a transaction target chain CSI; it can also purchase certain services through virtual currency, such as network-oriented query services and reporting services. Query transaction is a special transaction. The transaction form is the same as the general transaction form, but it requires special agreement on specific transaction methods, such as transactions with smart contract information for query transactions, or transactions with an agreed number of STOs to be transferred.

In some embodiments of the present application, before the step of initiating a query transaction by the transaction initiation chain, smart contract verification can be performed on the transaction initiation chain through the public chain to determine whether the transaction initiation chain supports the smart contract provided by the public chain. That is, the public chain initiates contract verification information to the blockchain network of the public chain network that is accessed to verify whether the accessed blockchain network supports the smart contract provided by the public chain. Because in practice, every blockchain network connected to the public chain may be used as a transaction initiation chain. Therefore, in this embodiment, after a blockchain network is connected to the public chain, it can be intelligent. Contract verification.

After the smart contract verification is performed, the public chain may set a contract judgment label for the accessed blockchain network according to whether the smart contract verification result is supported. Specifically, a contract judgment label is set for the corresponding interface node of the accessed blockchain network; or a contract judgment label is set for the accessed blockchain network address. The method for setting the contract judgment label for the corresponding interface node of the accessed blockchain network can be used to extract the judgment label set for the interface node when the corresponding blockchain network is used as the transaction initiation chain, so as to determine whether the current transaction initiation chain supports it. Smart contracts; and in the manner of setting a contract judgment label for the accessed blockchain network address, it can also determine whether the corresponding transaction initiating chain supports smart contracts by extracting the address of the transaction initiating chain.

In this embodiment, for a transaction initiation chain that supports smart contracts, a query transaction can be initiated directly to the public chain through a smart contract without the participation of a parallel chain. For a transaction initiation chain that does not support smart contracts, the public chain can be used as The transaction initiation chain is configured with a smart contract, or a parallel chain bridging method is used to pass query transactions from the transaction node to the public chain. Among them, the parallel chain has been configured with a smart contract. Therefore, as shown in FIG. 3, before the transaction initiation chain initiates a query transaction to the public chain, the transaction method may further include:

S105: the public chain judges whether the transaction initiation chain supports smart contracts;

S106: If the transaction initiation chain does not support the smart contract, create a smart contract for the transaction initiation chain through the public chain, or configure a public smart contract for the transaction initiation chain;

S107: The public chain determines the addresses corresponding to the transaction initiation chain and the transaction target chain according to the smart contract or the public smart contract.

In this embodiment, the public chain can determine whether the transaction initiation chain supports smart contracts through the public chain. The public chain can extract the contract judgment tags on the transaction initiation chain, that is, determine whether the transaction initiation chain supports smart contracts by analyzing the contract judgment tags. A smart contract on the public chain can be used to initiate a specific format of the contract judgment transaction to the transaction initiation chain, and analyze the contract judgment results returned by the transaction initiation chain. If the transaction initiation chain can return content that meets the smart contract specifications, determine that the transaction initiation chain supports smart contracts; if the transaction initiation chain cannot return content that meets the smart contract specifications, or does not respond, determine that the transaction initiation chain does not support smart contracts.

For the transaction initiation chain that supports smart contracts, subsequent transaction steps can be performed, that is, the transaction initiation chain initiates query transactions to the public chain through smart contracts. For a transaction initiation chain that does not support smart contracts, a smart contract can be configured for the transaction initiation chain through the public chain, or a public contract can be selected for the transaction initiation chain through the public chain, and the selected public contract can be configured for the transaction initiation chain. In this embodiment, the public contract may be a contract used by a blockchain network with a high degree of application, or a contract specification agreed in the current industry field. After a smart contract or a public smart contract is configured for the transaction initiation chain, the public chain can also determine the address information of the transaction initiation chain and the transaction target chain, that is, the transaction initiation chain and the transaction target chain are clearly defined in order to implement subsequent transactions.

S2: The public chain inquires the transaction target chain connected to the public chain network according to the service type information in the query transaction.

In the technical solution provided in this application, after receiving a query transaction initiated by the transaction initiation chain, the public chain extracts service type information in the query transaction, and performs a query in the public chain network according to the service type information to find that it can provide the service. The blockchain network of the type information corresponding service serves as the transaction target chain. Similarly, the network as a transaction target chain also includes multiple nodes, that is, multiple nodes constitute a transaction target chain. Therefore, the services that can be provided in the transaction target chain can be one or some nodes. It can be seen that, in the technical solution provided in the present application, the results queried by the public chain can be the transaction target chain or the nodes that can provide services in the transaction target chain. In the technical solution provided by the present application, it is preferred that the result of the public chain query is a method of transaction target chain, in order to quickly determine the transaction target chain, and avoid the situation that the transaction target chain does not support public chain query.

In this embodiment, the query of the transaction target chain by the public chain in the public chain network can be completed by the smart contract configured in the public chain or by a decentralized application in the public chain network. The specific query process may be querying the information of the access to the blockchain network stored in the public chain network. This query method requires that the public chain obtains the registered information of the accessed blockchain network through the communication of the access node when the blockchain network accesses. The registered information may include: the types of services that can be provided, and the The types of exchanges that are exchanged, as well as the methods of conducting transactions and the conditions of transactions. Programs in the public chain store these registration information and corresponding network addresses and broadcast them on the entire network.

The query process can also be completed in the following form. After the public chain receives the query transaction, it broadcasts a transaction for service provision on the entire network. After receiving the transaction provided by the service, the blockchain network connected to the public chain can respond accordingly to the transaction. The response information can include transaction conditions and transaction methods. The public chain chooses to reply to the earliest blockchain network as the transaction target chain, or judges the transaction conditions to determine the most suitable (such as the least number of STOs, or the best liquidity of STOs).

Further, in order to facilitate transaction settlement and complete accounting procedures, as shown in FIG. 4, after the public chain queries the transaction target chain connected to the public chain network, the method further includes:

S201: The public chain judges whether the transaction initiation chain and the transaction target chain support transactions directly through the Zhengtong of the public chain;

S202: If the transaction initiation chain and / or the transaction target chain do not support transactions directly through the Zhengtong of the public chain, the transaction initiation chain and / or the corresponding parallel Convert the said Zhengtong in the chain;

S203: The parallel chain corresponding to the transaction initiation chain initiates a service transaction to the public chain, and the parallel chain corresponding to the transaction target chain returns a service content to the public chain.

In this embodiment, after querying the transaction target chain, the public chain can determine whether the transaction initiation chain and the transaction target chain support transactions directly through the public chain certificate exchange based on the information stored in the public chain. And the transaction target chain can be directly traded through the public chain Zhengtong, thereby facilitating the public chain to conduct accounting procedures and verify transaction settlement. If the transaction initiation chain and / or the transaction target chain do not support transactions directly through the stock exchange of the public chain, the transaction initiation chain and / or the parallel chain corresponding to the transaction target chain According to the conversion of the China Securities Exchange, according to the exchange ratio between the public securities exchange and the transaction initiation chain, and the transaction target chain, the securities exchange paid by the transaction initiation chain is first converted into an equivalent value of the public blockchain securities, and then passed through the public exchange. The chain passes the public chain certificate pass to the transaction target chain. And in the subsequent transaction process, service transactions are completed by the parallel chain.

S3: The public chain returns transaction target chain information that conforms to the service type information to the transaction initiation chain, and the transaction target chain information includes a target chain address, a transaction method, and transaction conditions.

After querying the transaction target chain, the public chain can obtain the address information of the transaction target chain, the transaction method, and the transaction conditions. Obviously, the public chain can obtain the above information from the registration information stored in the public chain, or it can provide the information by one side of the transaction target chain by forwarding the query transaction to the transaction target chain. In order to increase the query efficiency, the present application preferably obtains the above information by means of registration information stored in the public chain. After the public chain obtains the transaction target chain information, it can send the obtained target chain information to the transaction initiation chain, so that the transaction initiation chain can determine whether to trade with it according to the transaction target chain information.

In the technical solution provided in the present application, the target chain address is a registered address of the transaction target chain in the public chain network, or the node address of the interface provided when the transaction target is linked into the public chain. The transaction method is the transaction time set by the transaction target chain, the block chain information format (template), and the type of stock exchange that supports the transaction. Transaction conditions may include not only the specified number of STOs required to provide services, but also the qualification requirements for the transaction initiation chain, such as the number of STOs owned and the credit score of the transaction initiation chain.

Further, in order to obtain a more suitable transaction target chain, some additional information can be attached to the query transaction, such as the type of transaction certificate that can be provided, the required service specifications, the service provision qualification of the transaction target chain, and the transaction certificate. Pass cap and so on.

For example, when the query transaction issued by the transaction node B25 does not have a node capable of providing the token exchange service in the network B, the query transaction can be performed through the connection node BP (or interface node) between the network B and the public chain network P. Broadcast to the maintenance nodes P01 to P99 in the public chain network P. The maintenance nodes in the public chain also need to verify and distributed storage of the query transaction, and access other blocks on the public chain network P according to the query transaction. Whether the chain networks A, C, D, E can provide the exchange service of the Zhengtong. If other blockchain networks are queried and there is Network A that can satisfy the SECEX exchange service, then the address information of Network A in the public chain network P is obtained, such as the IP address of the connecting node AP, and Network A is in the public domain. The transaction conditions registered in the chain network P are the transaction conditions required when the Zentong Tb is exchanged for the Zentong Ta, such as the exchange ratio of the Zentong Tb and the Zentong Ta, and the exchange qualifications required by the transaction counterparty required by the network A. The service node in the public chain P creates the query result of the address of the network A and the transaction conditions of the network A, and returns the query result to the transaction node B25.

S4: The transaction initiation chain initiates a service transaction to the public chain according to the transaction method and transaction conditions.

In the technical solution provided in this application, after receiving the transaction target chain information returned by the public chain, the transaction initiation chain can analyze the transaction target chain information to extract the transaction mode and transaction conditions in the transaction target chain information. Among them, with regard to the transaction method, the transaction initiation chain can determine whether to support the transaction method provided by the transaction target chain; and for the transaction conditions, it can automatically or manually determine whether the transaction conditions proposed by the transaction target chain can be accepted. If the transaction conditions can be accepted and the corresponding transaction methods are supported, the transaction initiation chain can initiate service transactions that meet the transaction conditions to the public chain in accordance with the specified transaction method.

The step of the transaction initiation chain initiating a service transaction to the public chain according to the transaction conditions includes: the transaction initiation chain creates a transfer transaction on the public chain to trigger contract execution, and the transfer transaction includes a specified transaction paid to the transaction target chain The number of securities pass.

For example, after the maintenance node in the public chain network P returns the query result to the transaction node B25, the transaction node B25 verifies the transaction conditions and transaction methods in the returned query result. On the one hand, it is determined whether the transaction meets the requirements, that is, whether it can Satisfying the request of the STO exchange service of B25 can determine whether the transaction conditions can be accepted, for example, whether the STO exchange rate required by the transaction target chain A can be accepted. The above verification process can be judged automatically by Node B25, or it can actively choose whether to accept the transaction conditions. In addition, the verification of the returned query results may also include whether the transaction node B25 can perform transactions in accordance with the transaction method specified by the transaction target chain A.

If the transaction node B25 accepts the transaction conditions and is able to conduct transactions in the transaction mode specified by the transaction target chain A, the transaction node B25 initiates a formal service transaction, that is, transfers 100 securities pass Tb to the public chain network P. It should be noted that, in this cross-chain transaction, the maintenance nodes in the public chain network have engaged in the corresponding query and storage operations, and in the subsequent transaction process, they will also participate in other operations, such as transfer, value conversion, Bookkeeping, etc., therefore, when the transaction node B25 initiates a formal service transaction to the public chain, it is also necessary to transfer a specific number of public chain tokens to the public chain network as a reward for maintaining nodes in the public chain.

Further, as shown in FIG. 5, the transaction conditions include the number of transaction certificates specified by the transaction target chain, and the step of initiating the service initiating a service transaction to the public chain according to the transaction conditions further includes:

S401: Determine whether the number of STOs owned by the transaction initiation chain meets the number of STOs designated by the transaction target chain;

S402: If the number of STOs owned by the transaction initiation chain satisfies the number of STOs designated by the transaction target chain, allow the transaction initiation chain to initiate service transactions to the public chain;

S403: If the number of STOs owned by the transaction initiation chain does not satisfy the number of STOs designated by the transaction target chain, send prompt information to the transaction initiation chain, and continue to query other access to the public chain network according to the service type Transaction target chain.

In this embodiment, if the transaction conditions are the number of transaction tokens designated by the transaction target chain, the public chain can judge the balance of the designated tokens owned by the transaction initiation chain to determine whether the transaction initiation chain can meet the transaction target chain designation Trading conditions required. For the case where the transaction conditions can be met, the transaction initiation chain is allowed to initiate service transactions to the public chain; in the case where the transaction conditions cannot be met, a prompt message can be sent to the transaction initiation chain to inform the transaction initiation chain, and also You can continue to query other transaction target chains connected to the public chain network according to the service type, and repeat the above process until the query satisfies the transaction conditions.

For example, the transaction condition required by the transaction target chain A is that the number of TBTs owned by the transaction node as the transaction initiator is not less than 100. Therefore, before initiating a formal service transaction, the certificate owned by the transaction node can be issued through the public chain network. Judging the number of transaction Tb, if the number of Tb of the transaction node owned by the transaction node is 53, it is determined that the transaction conditions are not met. At this time, the public chain network sends a reminder message to the transaction node B25, such as "The certificate that you own The balance of Tb is insufficient to complete the transaction. "" The transaction requires at least 100 Tb passes for the transaction, and you need 47 to complete the transaction. "

S5: The public chain passes the service transaction to the transaction target chain.

In the technical solution provided in this application, the service transaction sent by the transaction initiation chain to the public chain may not be processed in the public chain, and only the public chain network will pass the service transaction to the transaction target chain. Among them, the public chain can extract the address information of the transaction target chain in the service transaction, obtain the position of the transaction target chain, and then send the service transaction to the transaction target chain according to the address of the transaction target chain.

For example, after receiving the service transaction initiated by the transaction node B25, the maintenance node in the public chain network P verifies the 100 Zentong Tb transferred by the transaction node, and forms block data that conforms to the public chain transaction form for the service transaction. And broadcast the formed block data in the public chain network, and then transfer the 100 TST to the Tb account corresponding to network A.

Because the transfer of service transactions depends on the completion of the public chain, in order to achieve the effect of non-repudiation transactions, the public chain needs to perform distributed storage in the public chain network when transmitting the service transaction, that is, to keep accounts in the public chain network. Therefore, when the service transaction is delivered by the public chain, it is also a transaction that occurs in the public chain network. In practical applications, for different blockchain networks, the types of Zhengtong in circulation are different, and different types of Zhengtong often cannot directly trade. Therefore, in the technical solution provided in this application, in the process of the public chain transmitting the service transaction to the transaction target chain, the Zentong of the transaction initiation chain payment can be locked, and then other public funds of equal value are transferred to the transaction target chain. The chain certificate is used to trigger the transaction target chain to return the service content.

That is, in some embodiments of the present application, as shown in FIG. 6, the step of the public chain transmitting the service transaction to the transaction target chain includes:

S501: the public chain locks the transfer transaction, and initiates a request transaction to the transaction target chain according to the transfer transaction;

S502: The transaction target chain provides a return transaction result to the public chain according to the transaction request;

S503: The public chain verifies the return transaction result, and if the return transaction result is consistent with the transfer transaction, releases the locked state of the transfer transaction;

S504: The public chain transfers the Zentong of the transaction initiation chain payment to the transaction target chain, and transfers the service content to the transaction initiation chain.

In this embodiment, the public chain first locks the transfer transaction, that is, temporarily locks the Zentong of the transaction initiation chain payment, and then initiates a request transaction to the transaction target chain according to the transfer transaction. The request transaction is used to trigger the transaction target chain to return the transaction. The public chain then verifies the content of the return transaction. If the return transaction is consistent with the transfer transaction, the locked state of the transfer transaction is released, so that the public chain initiates the transaction through the chain of payment of the transaction, and transfers it to the transaction target chain, and Transfer the service content to the transaction initiation chain. Locking the transfer transaction through the public chain can verify the content of the transaction in the public chain network to determine whether it has truly met the transaction specifications and protect the transaction rights of both parties in the transaction.

S6: The transaction target chain verifies the transaction conditions, and returns the service content to the public chain according to the received service transaction after the verification is qualified.

In the technical solution provided in this application, after receiving the service transaction transmitted by the public chain, the transaction target chain first verifies the transaction conditions to determine whether the service transaction meets the transaction conditions. For example, whether the number of STOs paid by the service exchange meets the number of STOs required by the transaction target chain, and whether the transaction initiation chain has the transaction qualification required by the transaction target chain. If the transaction target chain verifies that the transaction conditions are qualified, the corresponding service content is returned according to the received service transaction, that is, the corresponding service is provided for the transaction initiation chain.

The service content may include specific service content in the return transaction, for example, a data retrieval report, or another specified number of Zhengtong exchanged. For service contents that need to be maintained for a long time, the returned service contents may include corresponding network access information, verification codes, account numbers, etc. For the service content that needs to be maintained for a long time, the public chain does not need to directly participate in the subsequent data transfer process. Only when the service content is returned, the corresponding network access information, verification code, account number, and other information are passed to the transaction initiation chain. Distributed storage of the returned service content in the chain completes the accounting process.

S7: The public chain delivers the service content to the transaction initiation chain.

After receiving the service content returned by the transaction target chain, the public chain passes the service content to the transaction initiation chain in a relay manner. After the public chain forwards the service content to the transaction initiation chain, it represents the completion of the transaction. For example, after the public chain network P transfers 100 securities pass Tb to the Tb account corresponding to network A, the public chain network extracts certificates of equal value from the Ta account corresponding to network A after the transaction target chain is verified If the exchange ratio is 2: 1, then 50 securities exchange Ta will be extracted and transferred to the account corresponding to network B to complete the final service transaction.

In some embodiments of the present application, as shown in FIG. 7, after the step of the public chain returning the transaction target chain information corresponding to the service type information to the transaction initiation chain, if the transaction initiation chain and all The transaction target chains all support the agreed interface specifications of the public chain, and the method can also return service content to the transaction initiation chain through the following steps:

S8: The transaction initiation chain directly initiates a service transaction to the transaction target chain according to the transaction method and transaction conditions;

S9: The transaction target chain verifies the transaction conditions, and returns a service content to the transaction initiation chain according to the received service transaction after the verification is qualified.

In some blockchain network systems, since the entire network is a point-to-point network, theoretically any two nodes can establish a network connection. Therefore, different blockchain networks connected to the public chain can communicate directly. Such a blockchain network supports the interface specifications agreed by the public chain. That is, if both the transaction initiation chain and the transaction target chain support the interface specifications agreed by the public chain, after the public chain returns the transaction target chain information that conforms to the service type information to the transaction initiation chain, the transaction initiation chain can directly extract the transaction target chain The address of the transaction target chain in the information, and directly initiate a service transaction to the transaction target chain according to the address.

The transaction target chain verifies the transaction conditions after receiving the service transaction initiated by the transaction initiation chain, and the specific verification content is consistent with the content of the above embodiment. After the transaction conditions are qualified, the transaction target chain directly returns the transaction content to the transaction initiation chain according to the received service transaction to complete the final transaction.

For the above situation, in order to ensure the transaction accounting procedure between the transaction initiation chain and the transaction target chain, when the transaction initiation chain initiates a service transaction, a distributed accounting can be performed inside the transaction initiation chain, and the stored block data Or, a summary of the block data is sent to the public chain network for distributed storage; and, when the transaction target chain returns the service content, distributed accounting is performed in the transaction target chain, and the stored block data is also stored. Or a summary of the block data is sent to the public chain network for distributed storage. In addition, after the transaction target chain sends the stored blockchain data or data summary to the public chain, the public chain can also use the address information in the block data to make the block data sent by the transaction initiation chain and the transaction target chain consistent. Contrast, determine the legality of the transaction, etc.

The difference between this embodiment and the above embodiment is that the public chain network is only responsible for corresponding query transactions, that is, after the transaction initiation chain initiates a query transaction, the public chain network queries the transaction target chain according to the query transaction and then sets the address of the transaction target chain. The information is returned to the transaction node B25. According to the target chain address information, the transaction node B25 directly initiates a service transaction to the transaction target chain A, that is, transfers 100 securities pass Tb to the transaction target chain A, and the service node in the transaction target chain A receives it again. After 100 securities pass Tb, transfer another 50 securities pass Ta to the transaction node B25 to complete the transaction directly. Obviously, in order to avoid transaction errors, when the transaction node B25 transfers 100 STOs Tb to the transaction target chain A, the formed block data is broadcast not only in network B, but also in the public chain network. When the service node of the transaction target chain A transfers 50 Zhengtong Ta to the transaction node B25, it also needs to broadcast simultaneously or asynchronously in the transaction target chain network A and the public chain network P.

It should be noted that, in the technical solution provided in the present application, for the convenience of description, the transaction node B25 transfers 100 securities pass Tb to the transaction target chain A, and the service node of the transaction target chain A transfers 50 transaction nodes B25 The Zhengtong Ta refers to the circulation direction of the Zhengtong or the transaction result, and does not really transfer the Zhengtong entity from one chain to another. In practical applications, both parties to the transaction can have corresponding accounts in both networks, and the transfer transaction only transfers the Zentong to the corresponding account, that is, 100 Tb are exchanged on the B network and 50 Ta are exchanged on the A network. For network exchange, only the transaction information and accounting data transmitted through the public chain describe the content of cross-chain transactions.

Based on the above transaction method, this application also provides a public chain-based blockchain system. As shown in FIG. 8, the system includes: a transaction initiation chain, a public chain, and a transaction target chain; the transaction initiation chain passes through the The public chain establishes a network connection with the transaction target chain; wherein the transaction initiation chain refers to the blockchain network as the transaction initiator, and the transaction target chain refers to the blockchain network as the transaction target.

In order to complete the cross-chain transaction, the transaction initiation chain is configured to perform the following program steps: initiating a query transaction containing service type information to the public chain. That is, at the beginning of cross-chain transactions, the transaction initiation chain initiates query transactions to the public chain, so that the public chain can query the transaction target chain in the public chain network. And, a service transaction is initiated to the public chain according to the transaction conditions of the transaction target chain. That is, after the public chain returns the transaction target chain information that matches the service type information, a service transaction is initiated to the public chain.

The public chain is configured to: query the transaction target chain connected to the public chain network according to the service type in the query transaction; and return the transaction target chain information that matches the service type information to the transaction initiation chain. The transaction target chain information includes a target chain address, a transaction method, and transaction conditions; and, passing the service transaction to the transaction target chain, and passing the service content to the transaction initiation chain;

The transaction target chain is configured to verify the transaction conditions, and return the service content to the public chain according to the received service transaction after the verification is qualified. In addition, the transaction target chain can also provide the public chain with its own address information, transaction methods, and transaction conditions after the transaction chain is queried by the public chain.

In the technical solution provided in this application, the transaction initiation chain and the transaction target chain refer to a part of multiple blockchain networks connected to the public chain network, so any one of the multiple blockchain networks connected to the public chain network is It can be used as a transaction initiation chain, as long as it has a sufficient number of STOs to trigger a transaction. Similarly, each blockchain network can also be used as a transaction target chain, as long as it supports external transactions and can provide specific service content. That is, in the technical solution provided in this application, the transaction initiation chain and the transaction target chain are only for convenience of description, and do not limit the blockchain network.

It should be noted that, in the embodiment of the present application, the service content of the Zentong exchange is used as an example to describe the solution. Obviously, for different forms of service content, the transaction process is the same as the transaction process of the Zentong exchange, only at the transaction node. When initiating a service transaction, after the transaction node transfers a specified amount of Zhengtong to the public chain (or transaction target chain), the transaction target chain returns the specific transaction content according to the service transaction, such as the query result of the performance of a certain type of communication equipment.

It can be known from the above technical solutions that the present application provides a public chain-based transaction method and a blockchain network. In practical applications, the method first initiates a query transaction from the transaction initiation chain to the public chain, and then uses the public chain to query the transaction target chain connected to the public chain network according to the service type information in the query transaction; The initiation chain returns information about the transaction target chain that meets the service type information; the transaction initiation chain then initiates a service transaction to the public chain according to the transaction method and transaction conditions required by the transaction target chain; the public chain passes the service transaction to the transaction target chain; and After the transaction target chain verifies that the transaction conditions are qualified, the service content is returned to the public chain according to the received service transaction. Finally, the public chain passes the service content to the transaction initiation chain to complete the cross-chain transaction. The method queries and transmits service transactions through the public chain network, so that the transaction initiation chain can obtain the service content of the transaction target chain, complete cross-chain transactions between different chain networks, and increase the application scope of the blockchain-based transaction method.

Similar parts between the embodiments provided in this application can be referred to each other. The specific implementations provided above are just a few examples under the general concept of this application, and do not constitute a limitation of the protection scope of this application. For those skilled in the art, any other implementations extended according to the scheme of the present application under the premise of no creative labor belong to the protection scope of the present application.

Claims

A public chain-based transaction method is characterized in that it includes:

The transaction initiation chain initiates a query transaction containing service type information to the public chain;

The public chain queries the transaction target chain connected to the public chain network according to the service type information in the query transaction;

The public chain returns the transaction target chain information that matches the service type information to the transaction initiation chain. The transaction target chain information includes the target chain address, transaction method, and transaction conditions.

The transaction initiation chain initiates service transactions to the public chain according to the transaction method and transaction conditions;

The public chain transfers service transactions to the transaction target chain;

The transaction target chain verifies the transaction conditions and returns the service content to the public chain according to the received service transaction after the verification is qualified;

The public chain delivers service content to the transaction initiation chain.
The transaction method according to claim 1, wherein the step of the transaction initiation chain initiating a query transaction containing service type information to the public chain comprises:

The transaction nodes in the transaction initiation chain generate transaction information according to the actual transaction;

The transaction node broadcasts the transaction information in the transaction initiation chain to form a blockchain bookkeeping that conforms to the transaction initiation chain;

The bookkeeping node validates the transaction and adds block data;

The bookkeeping node broadcasts the block data to other nodes in the transaction initiation chain, and simultaneously initiates query transactions to the maintenance nodes in the public chain. The smart contracts provided by the public chain include smart contracts and public smart contracts created by the public chain.
The transaction method according to claim 1, characterized in that before the step of initiating a transaction initiating a transaction including service type information by the transaction initiation chain to the public chain, the method further comprises:

The public chain initiates contract verification information to the blockchain network of the accessed public chain network to verify whether the accessed blockchain network supports the smart contract provided by the public chain;

The public chain sets a contract judgment label for the connected blockchain network according to the verification result of whether the smart contract is supported, including: setting a contract judgment label for the corresponding interface node of the accessed blockchain network; or, for the accessed block The chain network address sets the contract judgment label.
The transaction method according to claim 1, wherein after the step of the public chain returning the transaction target chain information corresponding to the service type information to the transaction initiation chain, if both the transaction initiation chain and the transaction target chain support the interface agreed by the public chain Specification, the method can also return service content to the transaction initiation chain through the following steps:

The transaction initiation chain initiates service transactions directly to the transaction target chain according to the transaction method and transaction conditions;

The transaction target chain verifies the transaction conditions, and returns the service content to the transaction initiation chain according to the received service transaction after the verification is qualified;

After the transaction initiation chain and the transaction target chain complete the transaction, the corresponding transaction summary information is synchronized to the public chain.
The transaction method according to claim 1, wherein the step of initiating a query transaction including service type information from the transaction initiation chain to the public chain further comprises:

The public chain judges whether the transaction initiation chain supports smart contracts;

If the transaction initiation chain does not support smart contracts, create a smart contract for the transaction initiation chain through the public chain, or configure a public smart contract for the transaction initiation chain;

The public chain determines the addresses corresponding to the transaction initiation chain and the transaction target chain according to the smart contract or public smart contract.
The transaction method according to claim 1, wherein the transaction conditions include the number of transaction tokens designated by the transaction target chain, and the step of the transaction initiation chain initiating a service transaction to the public chain according to the transaction conditions further comprises:

Determine whether the number of STOs owned by the transaction initiation chain meets the number of STOs specified by the transaction target chain;

If the number of STOs owned by the transaction initiation chain meets the number of STOs specified by the transaction target chain, the transaction initiation chain is allowed to initiate service transactions to the public chain;

If the number of STOs owned by the transaction initiation chain does not satisfy the number of STOs specified by the transaction target chain, send a prompt message to the transaction initiation chain and continue to query other transaction target chains connected to the public chain network according to the service type.
The transaction method according to claim 1, wherein the step of the transaction initiation chain initiating a service transaction to the public chain according to the transaction conditions comprises: the transaction initiation chain creates a transfer transaction on the public chain to trigger contract execution, and the transfer transaction includes The number of designated transaction tokens paid to the transaction target chain.
The transaction method according to claim 7, wherein the step of the public chain transmitting the service transaction to the transaction target chain comprises:

The public chain locks the transfer transaction and initiates a request transaction to the transaction target chain according to the transfer transaction;

The transaction target chain provides return transaction results to the public chain according to the transaction request;

The public chain verifies the return transaction result. If the return transaction is consistent with the transfer transaction, the lock status of the transfer transaction is released;

The public chain transfers the payment of the transaction initiation chain to the transaction target chain, and transfers the service content to the transaction initiation chain.
The transaction method according to claim 1, wherein after the public chain queries the transaction target chain connected to the public chain network, the method further comprises:

The public chain judges whether the transaction initiation chain and the transaction target chain support transactions directly through the Zhengtong of the public chain;

If the transaction initiation chain and / or the transaction target chain do not support transactions directly through the Zhengtong of the public chain, convert the securities in the transaction initiation chain and / or the parallel chain corresponding to the transaction target chain;

The parallel chain corresponding to the transaction initiation chain initiates service transactions to the public chain, and the parallel chain corresponding to the transaction target chain returns service content to the public chain.
A public chain-based blockchain system is characterized by comprising: a transaction initiation chain, a public chain, and a transaction target chain; the transaction initiation chain establishes a network connection with the transaction target chain through the public chain;

The transaction initiation chain is configured to: initiate a query transaction including service type information to the public chain; and initiate a service transaction to the public chain according to the transaction conditions of the transaction target chain;

The public chain is configured to: according to the service type in the query transaction, query the transaction target chain connected to the public chain network; return the transaction target chain information corresponding to the service type information to the transaction initiation chain, and the transaction target chain information includes the target Chain address, transaction method and transaction conditions; and, passing service transactions to the transaction target chain, and passing service content to the transaction initiation chain;

The transaction target chain is configured to verify transaction conditions and return service content to the public chain according to the received service transaction after the verification is qualified.