WO2020042929A1

WO2020042929A1 - Block chain system

Info

Publication number: WO2020042929A1
Application number: PCT/CN2019/101043
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 block chain system, comprising a peer-to-peer (P2P) network. Nodes in the P2P network are deployed as public chain nodes or various access chain nodes, respectively; the nodes are deployed as one or more logical layers in a data block layer, a network switching layer, a platform framework layer, a de-centralized application layer, and a cross-domain layer according to roles or functions of the nodes in a block chain network; the layers perform data operations in their own layers independently of one another, and generation, verification and storage of block data during transaction can be completed by means of data interaction among the layers. In addition, by deploying the cross-domain layer, managing cross-chain transactions, performing transaction verification, and providing a cross-chain intelligent contract, the problem that a conventional block chain system does not support the cross-chain transactions is solved.

Description

Blockchain system

This application requires the submission of the China Patent Office on August 28, 2018, application number 201810986825.3, the invention name as "Blockchain Standard Application Model and Application Method", and the submission of the China Patent Office, application on December 7, 2018 The priority of a Chinese patent application with the number of 201811496869.4 and the invention name of "a blockchain system" is incorporated herein by reference in its entirety.

Technical field

This application relates to the field of network transaction technology, and in particular, to 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.

The application of blockchain technology depends on the blockchain system. As shown in Figure 1, the blockchain system includes a data layer, a network layer, a consensus layer, an incentive layer, a contract layer and an application layer. Among them, the data layer encapsulates the underlying data blocks and basic data algorithms; the network layer connects each network node to form a point-to-point network in the form of distributed networking to achieve data dissemination and verification; the consensus layer encapsulates various consensus algorithms; incentive layer integration Economic factors to formulate the issuance and distribution mechanism; the contract layer provides scripts, algorithms and smart contracts; the application layer encapsulates specific application scenarios.

The actual transaction process in the system must be completed on the blockchain platform, and all blockchain platforms are designed for a certain application scenario. There is no unified and effective mechanism for communication and communication between different chains (blockchain platforms). Interaction. Multiple blockchain platforms provide different sets of capabilities to enable different transactions. Because of the endogenous nature of the blockchain platform, the work and content completed are based on in-chain scenarios and in-chain applications, and it is difficult to support external transactions, that is, it is difficult for existing blockchain systems to implement cross-blockchain platforms (cross-chain) ) And cross-domain (cross-domain) transactions.

In order to achieve cross-chain transactions, existing blockchain systems can also provide relay services, such as BTC Relay, a solution that relays the Bitcoin blockchain and Ethereum smart contracts. It can be seen that the existing cross-connect solutions are specific to a specific blockchain, and one-to-one relay services are implemented. There are many types of blockchain platforms and transaction types in reality. New blockchains and platforms The continuous emergence of cross-chain transactions also results in very different types and types. It is difficult to formulate a specific one-to-one relay scheme for each type of cross-chain transaction. Therefore, how to provide a unified blockchain system to support various types of blockchain platforms and their support for cross-chain transactions, and to complete the communication and interaction between different chains, has become an urgent technical problem in this field.

Summary of the Invention

This application provides a blockchain system to solve the problem that traditional blockchain systems do not support cross-chain transactions and cannot complete communication and interaction between different chains.

This application provides a blockchain system, including a P2P network, where nodes in the P2P network are deployed as public chain nodes or various access chain nodes, respectively, in which, according to the role or function of the node in the blockchain , Deploying the node as one or more of the following logical layers:

The data block layer, which includes a sequential collection based on physical data blocks, is used to provide distributed data storage and data reading for the entire blockchain network;

The network switching layer includes basic network facilities and multiple communication protocols for mutual discovery, networking, and communication of distributed nodes in the blockchain network;

Platform framework layer, including multiple blockchain platforms connected to the blockchain network, to provide basic blockchain functions and architecture, as well as cross-chain mutual function registration and discovery;

Decentralized application layer, including a collection of applications installed in a network environment and support for building third-party decentralized applications for application creation, deployment, docking, and use;

Cross-domain layer, including transaction server, for managing cross-chain transactions, transaction verification, and providing cross-chain smart contracts.

Optionally, in the blockchain system, each layer performs data operations independently of each other, and transmits data operation results through a formatted interface between layers.

Optionally, the data block layer, network exchange layer, platform framework layer, and decentralized application layer are deployed in any node; the cross-domain layer is deployed in the maintenance of two or more blockchain networks On the public node.

Optionally, the same level between any nodes and data operations at the same level are deployed through distributed applications; data operations at different levels within a node are deployed through different applications.

Optionally, the data block layer is connected to the network switching layer through a data interface;

The nodes deployed as the data block layer send the generated transaction information to the network exchange layer;

A node deployed as a data block layer also receives and reads transaction information from the network exchange layer through a data interface, and stores the transaction information in a memory.

Optionally, the network switching layer is connected to the platform framework layer through a network interface.

Optionally, the platform framework layer is connected to the decentralized application layer through a contract interface and / or an application programmable interface;

An application in the decentralized application layer uses the platform framework layer as a development environment, and accesses the platform framework layer through the application programmable interface;

If the transaction information generated by the data block layer includes smart contract information, the smart contract information is also sent to the platform framework layer through the contract interface to process the transaction information through an application program.

Optionally, the decentralized application layer is connected to the cross-domain layer through the application interface;

The transaction server in the cross-domain layer invokes applications in the decentralized application layer through the application interface to implement cross-chain transactions.

Optionally, the cross-domain layer is also connected to the platform framework layer through a contract interface and / or an application programmable interface;

When the cross-domain layer implements cross-chain transactions, it provides a cross-chain smart contract to the blockchain platform in the platform framework layer through a contract interface.

Optionally, each of the access chain nodes belongs to the plurality of blockchain networks connected to the public chain, and the blockchain network connected to the public chain includes a sub-chain, an industry chain, and an alliance chain based on the public chain node interface specification, and Third-party public chain, industry chain, alliance chain and private chain.

As can be known from the above technical solutions, the present application provides a blockchain system, including a peer-to-peer P2P network. Nodes in the P2P network are respectively deployed as public chain nodes or various access chain nodes. The role or function assumed in the blockchain network is that the nodes are deployed as one or more logical layers in the data block layer, network exchange layer, platform framework layer, decentralized application layer, and cross-domain layer. Each layer performs data operations independently in this layer, and can complete block data generation, verification, and storage in transactions through data interaction between the layers. And, by deploying a cross-domain layer, managing cross-chain transactions, transaction verification, and providing cross-chain smart contracts, the traditional blockchain system does not support cross-chain transactions.

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 structural diagram of an existing blockchain system;

FIG. 2 is a schematic structural diagram of a blockchain system of the present application; FIG.

FIG. 3 is a schematic diagram of a connection structure between various logical levels in a blockchain system of this application;

FIG. 4 is a schematic diagram of the connection of the blockchain network of the present application;

FIG. 5 is a schematic flowchart of a transaction performed by this application;

FIG. 6 is a schematic flowchart of a cross-chain transaction in this application;

FIG. 7 is a schematic diagram of a public chain-based cross-chain transaction process.

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, the blockchain refers to the accounting data generated by transactions in the network system on the one hand, and the network running the blockchain technology, that is, the blockchain network on the other. The 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 is the accounting information generated based on the transaction information when a transaction occurs in the blockchain network, that is, multiple specific transactions form a block, and multiple blocks form a 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.

Specifically, referring to FIG. 2, it is a schematic structural diagram of a blockchain system of the present application; FIG. 3 is a schematic structural diagram of connections between various logical levels in the blockchain system of the present application. A blockchain system provided in this application includes a peer-to-peer P2P network. The P2P network is composed of multiple nodes, and each node has computing capabilities, application running capabilities, storage capabilities, and the ability to provide human-computer interaction. In practical applications, a node in a P2P network is not only a gateway device that provides network information transmission, but also any computer device certified by the blockchain network, such as personal computers, computer units, servers, and intelligent terminal devices.

In the technical solution provided in this application, as shown in FIG. 4, the blockchain network includes a public chain network that provides a basic platform, and other blockchain networks that access the public chain network, that is, an access chain network. In order to achieve the above form, the nodes in the P2P network described in this application are deployed as public chain nodes or various access chain nodes, respectively. For the public chain network and the access chain network, according to the scale of the blockchain network, it can be further divided into public chain, sub-chain and private chain. According to the application field of the blockchain network, it can also be divided into public chains, industry chains and alliance chains, as well as third-party public chains (such as the Bitcoin network, Ethereum network, etc.), third-party industry chains, and third-party alliance chains. . In this application, each blockchain network is composed of a different number of nodes, and each blockchain network can independently complete transactions, verification, and storage within the network.

Further, since the public chain of the present application serves as a basic platform and has cross-chain transmission, information relay, and connection functions, nodes in the public chain are provided with a unified and standardized standard interface. The access chain, as a blockchain system with specific functions relative to the public chain, can be a sub-chain developed based on the public chain node interface specification, and a third-party blockchain network. Therefore, in some embodiments of the present application, the access chain nodes each belong to the multiple blockchain networks connected to the public chain. The blockchain network connected to the public chain includes sub-chains and industries based on the public chain node interface specification. And alliance chains, as well as third-party public, industry, alliance, and private chains.

It can be known from FIG. 2 and FIG. 3 that in the blockchain system provided by the present application, according to the role or function of a node in the blockchain, the node is deployed into one or more of the following logical levels:

Cross-domain layer, used to manage cross-chain transactions, transaction verification, and provide cross-chain smart contracts.

In the technical solution provided in this application, a data block layer, a network switching layer, a platform framework layer, a decentralized application layer, and a cross-domain layer maintain a many-to-many correspondence relationship with each node. In other words, it can be deployed by one node alone or by multiple nodes. For a node, it can be deployed as a layer of functions or roles, or it can be deployed as multiple layers of functions or roles simultaneously. . For example, for a node in a blockchain system, a data block layer, a network exchange layer, a platform framework layer, a decentralized application layer, and a cross-domain layer can be deployed at the same time. During the network system transaction, such nodes will Participate in all data processing processes. For a node, it can also be used as a data block layer alone, that is, in this node, only the sequential collection based on physical data blocks is deployed in order to distributed data storage and data read functions when transactions occur.

It can be known from the above-mentioned levels that in this application, the data block layer is mainly used to provide distributed data storage and data reading of the entire blockchain network, that is, to generate formatted standard data according to transaction information, so as to Read and process between them; and store the data generated at each level or store the final result data of the transaction.

Further, the data block layer mainly includes the following functions: data storage, data indexing, data reading, data backup, data security setting and authentication, data permission setting and authentication, data verification, and data division and other functions or Operation, correspondingly, the nodes deployed as the data block layer should include data storage devices, such as hard disks, for storing data files, and can be further configured to form a database.

For the network switching layer, network applications are deployed to implement network registration, network discovery, network authentication, network grouping, network routing, and network transmission. Therefore, for nodes configured as the network switching layer, various network protocols should be stored therein .

For the platform framework layer, virtual machines and various contracts and accounts are deployed. In order to provide a development environment and a message channel, control related operations for setting transactions, fees, blockchain format, transaction status, transaction consensus, data encryption and decryption, and storage methods to ensure the standardization and correctness of data transactions.

As for the decentralized application layer, as an application layer, applications that are applied in multiple fields are deployed, such as: e-commerce, crowdfunding platforms, game transactions, financial management, item transactions, market transactions, social systems, and small-scale DAOs. Systems and management platforms or applications such as the Internet of Things. In the technical solution provided by this application, decentralized application refers to an application installed on a node configured as a decentralized application layer or installed in a network environment in a blockchain system. The basic algorithm and The specific processes are all consensus of the whole network, and its data processing process will not be controlled and modified by the central equipment, such as being controlled by a certain server.

For the cross-domain layer, the nodes configured as the cross-domain layer should store consensus contracts and have standardized access interfaces to complete cross-chain transactions, cross-chain verification, cross-chain contract configuration, cross-chain value discovery, Cross-chain services such as sub-chain / third-party access chain management.

In the blockchain system provided by this application, each layer performs data operations independently of each other, and transmits the results of data operations through a formatted interface between layers. For example, for the data block layer, the data is stored, read, and set independently. The process of generating a data file is not subject to any other level of control and influence. In actual applications, the data block layer is based on Specific application scenarios generate corresponding data such as transactions and contracts, and drive the results of data operations through formatted interfaces between layers.

As shown in FIG. 2, in some embodiments of the present application, the data block layer is connected to the network switching layer through a data interface. And the node deployed as the data block layer sends the generated transaction information to the network exchange layer; the node deployed as the data block layer also receives and reads the transaction information from the network exchange layer through the data interface, and sends the transaction information Stored in memory. In this embodiment, the data interface (DI, Data Interface) is a DI interface provided externally by the data block layer. The remaining layers, mainly the network switching layer and the platform framework layer, are directly based on the data interface DI to complete the docking with the data block layer And communication. Further, the data interface can provide the following types of interface sets, such as data generation (DIG), data storage (DIS), data query (DIQ), data read (DIR), and data delete (DID).

The network switching layer is connected to the platform framework layer through a network interface. The network interface (NI, Network Interface) is the unified NI interface provided by the network switching layer. The remaining layers, such as the platform framework layer, directly perform network communication and data exchange based on this interface. The network interface provides the following types of interface collections: NIQ), Network Registration (NIR), Network Access (NIC), Data Publishing (NIP), Data Synchronization (NIS), Network Grouping (NIG), etc.

The platform framework layer is connected to the decentralized application layer through a contract interface and / or an application programmable interface. The application in the decentralized application layer uses the platform framework layer as a development environment, and accesses the platform framework layer through the application programmable interface, and if the data block layer generates the The transaction information includes smart contract information, and the smart contract information is also sent to the platform framework layer through the contract interface to process the transaction information through an application program.

As for the application programmable interface (API), as the interface provided by the platform framework layer, all decentralized applications in the decentralized application layer can be developed, implemented, and deployed based on the interface of the layer. Application programmable interfaces mainly provide the following types of interface collections, such as cryptographic interfaces, consensus interfaces, account interfaces, status interfaces, message interfaces, channel interfaces, data structure interfaces, transaction interfaces, fee interfaces, and block interfaces. Decentralized applications have specific operational forms that pass different types of data. For smart contract (CI) interfaces, it mainly provides the following types of interface collections, such as virtual machine interfaces, contract interfaces, and release management interfaces.

The decentralized application layer is connected to the cross-domain layer through an application interface; the transaction server in the cross-domain layer calls the application program in the decentralized application layer through the application interface to implement cross-chain transactions. In this application, the application interface (AI) can exist in the form of a smart contract, that is, a decentralized application or network can provide value and information exchange capabilities through standard smart contracts.

In addition, in some embodiments of the present application, in order to complete cross-chain transactions, the cross-domain layer also connects the platform framework layer through a contract interface and / or an application programmable interface; and the cross-domain layer is implementing cross-chain transactions At that time, cross-chain smart contracts are provided to the blockchain platform in the platform framework layer through the contract interface.

In the blockchain system provided in this application, the data block layer, network exchange layer, platform framework layer, and decentralized application layer are deployed in any node; the cross-domain layer is deployed in the maintenance of two or Public nodes on more than two blockchain networks. That is, in the blockchain system of this application, any node can be used to deploy the data block layer, network exchange layer, platform framework layer, and decentralized application layer. At each level, as long as the nodes in the system have the computing power and hardware configuration required by the corresponding levels.

For the public chain network, when there is a sufficient number of nodes in the public chain network, all nodes can be divided into multiple parts, and the multiple parts are independent of each other, and there may also be some overlapping nodes. In addition, some nodes are used to configure one level, and other nodes are used to configure another level. By configuring different levels of functions for nodes in different parts, you can make full use of the computing power of each node in the public chain network and improve the efficiency of data generation, operation, verification, and storage.

The above data block layer, network exchange layer, platform framework layer, and decentralized application layer frequently transmit data to each other. Therefore, in order to speed up the data transmission efficiency, the above four levels can be deployed in a network environment and compared with each other. Near nodes. In addition, for nodes with higher hardware equipment configuration, it can be configured as a hierarchy of multiple roles or functions, for example, configured to have functions of the data block layer, network switching layer, platform framework layer, and decentralized application layer at the same time; and For nodes with lower configuration, it can be configured as a single-function level, for example, only as the network switching layer.

Since the main function of the cross-domain layer is to implement cross-chain transactions, in this application, the cross-domain layer should be deployed on a public node responsible for maintaining two or more blockchain networks, that is, two blockchains Network-connected nodes are preferentially configured with cross-domain layer functions. In this embodiment, the function of configuring the cross-domain layer for the public nodes responsible for maintaining two or more blockchain networks can facilitate cross-chain data transfer and verification, and improve the processing efficiency of cross-chain transactions.

Further, during the transaction operation of the blockchain network system, some nodes in the blockchain network system are randomly selected as the data block layer, network exchange layer, platform framework layer, and decentralized application. A combination of layers and one or more logical layer functions across domain layers. By randomly selecting appropriate nodes as the corresponding layer function, the transaction data generated at each layer can be prevented from being artificially changed, and combined with the encryption algorithm, the anti-repudiation effect of the blockchain data can be greatly increased. In addition, by randomly selecting and configuring the functions and roles of each node, it is also possible to reduce the number of participating nodes in the broadcast verification process of block data under the premise of ensuring data security, improve the verification efficiency of transaction data, and speed up Accounting procedures.

In some embodiments of the present application, data operations at the same level between any nodes and at the same level are deployed through distributed applications; data operations at different levels within a node are deployed through different applications. Among them, Decentralized Application (DAPP) is an application program that is applied in a network environment and can configure multiple network nodes at the same time. Therefore, in this embodiment, data operations at the same level between any nodes can be deployed and completed through distributed applications to ensure uniformity of data operations within the deployed level and reduce the probability of data errors. For a node, when a node has multiple levels of roles and functions deployed at the same time, each level corresponds to an application. Therefore, when performing data operations, you can directly use the corresponding applications at different levels within the node. Complete the respective data operations. Therefore, data operations in one level are avoided, and frequent transfers are performed between different nodes, thereby improving data operation efficiency.

According to the blockchain network system provided above, as shown in FIG. 5, the blockchain network system runs the following program steps for transaction operations:

S11: The node acting as the transaction initiator generates data blocks according to the transaction information, and sends the data blocks to the platform framework layer through the network exchange layer;

S12: The platform framework layer calls the application in the decentralized application layer and processes the data block through the application;

S13: The platform framework layer uses the called application program to complete the transaction according to the data block, and generates accounting data at the platform framework layer;

S14: The platform framework layer sends the accounting data to the data block layer for distributed storage through the network exchange layer.

It can be known from the above steps that, in the practical application of the blockchain network system provided by the present application, for general transaction operations, a node acting as a transaction initiator first generates data blocks based on the transaction information, and passes the data blocks through the network exchange layer. Send to the platform framework layer; the platform framework layer then processes the data blocks by calling applications in the decentralized application layer; and then completes transactions based on the data blocks through the platform framework layer and generates accounting data at the platform framework layer; where The generation of accounting data refers to broadcasting and verification in each node to form a blockchain. Finally, the platform framework layer sends the accounting data to the data block layer for distributed storage through the network exchange layer to complete the transaction.

Further, as shown in FIG. 6, for the cross-chain transaction operation, the blockchain network system executes the following program steps:

S21: The node acting as the transaction initiator generates data blocks according to the transaction information, and sends the data blocks to the platform framework layer through the network exchange layer;

S22: The platform framework layer calls the application to process data blocks from the decentralized application layer, and determines the corresponding blockchain platform of the transaction target party through the cross-domain layer;

S23: The cross-domain layer uses the called application program to complete the transaction according to the blockchain platform corresponding to the data block and the target party, and generates accounting data in the platform framework layer;

S24: The platform framework layer sends the accounting data to the data block layer for distributed storage through the network exchange layer.

It can be known from the above steps that when performing cross-chain transactions in this application, a node acting as a transaction initiator first generates a data block according to the transaction information, and sends the data block to the platform framework layer through the network exchange layer; Then, through the platform framework layer, the application is called to process data blocks from the decentralized application layer.At the same time, the transaction target is determined through the cross-domain layer, that is, the public chain network or an access chain corresponding to the public chain network. Blockchain platform. After the transaction target chain is determined, the cross-domain layer uses the calling application to complete the transaction according to the block chain platform corresponding to the data block and the target party, and generates accounting data in the platform framework layer. Finally, the platform framework layer exchanges through the network Layer, sending accounting data to the data block layer for distributed storage.

It can be seen that in the technical solution provided by the present application, for the case that the transaction needs to cross two or more, the cross-domain layer needs to be called to find the transaction target chain and transfer the transaction data from the transaction initiator's blockchain network to the transaction target. Blockchain network.

It should be noted that in the technical solution provided in this application, as long as the transaction process is not completed in a blockchain network, it can be determined as a cross-chain transaction. For example, transactions between third-party public chains and public chains, transactions between industry chains, alliance chains and public chains, transactions between public chains and sub-chains, etc., because the transaction process spans two blockchain networks Therefore, cross-chain transactions can be completed according to the above steps. For some transactions, it may cross more than two blockchain networks, for example, one industry chain cross-chain transactions with another industry chain through the public chain. For this type of cross-chain transaction, the above-mentioned cross-chain transaction process can be performed once between the first industry chain and the public chain; then the above-mentioned cross-chain transaction process can be performed once between the public chain and the second industry chain to complete the final Cross-chain transactions.

That is, on the overall blockchain system, as shown in Figure 7, the following steps are completed to complete cross-chain transactions:

S31: The transaction initiation chain initiates a service transaction to the public chain;

S32: The public chain passes the service transaction to the transaction target chain;

S33: 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;

S34: The public chain delivers the service content to the transaction initiation chain.

In this embodiment, by establishing a public chain and implementing cross-chain transaction transfer, in practice, the entire chain of the public network can be established and the blockchain network participating in the transaction can be connected to the public chain to achieve different chain Cross-chain transactions.

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 blockchain system includes a P2P network, characterized in that the nodes in the P2P network are respectively deployed as public chain nodes or various access chain nodes, wherein according to the role of the node in the blockchain or Functions for the nodes deployed as one or more of the following logical layers:

The data block layer, which includes a sequential collection based on physical data blocks, is used to provide distributed data storage and data reading for the entire blockchain network;

The network switching layer includes basic network facilities and multiple communication protocols for mutual discovery, networking, and communication of distributed nodes in the blockchain network;

Platform framework layer, including multiple blockchain platforms connected to the blockchain network, to provide basic blockchain functions and architecture, as well as cross-chain mutual function registration and discovery;

Decentralized application layer, including a collection of applications installed in a network environment and support for building third-party decentralized applications for application creation, deployment, docking, and use;

Cross-domain layer, including transaction server, for managing cross-chain transactions, transaction verification, and providing cross-chain smart contracts.
The blockchain system according to claim 1, characterized in that, in the blockchain system, each layer performs data operations independently of each other, and transfers data operation results through a formatted interface between layers.
The blockchain system according to claim 2, wherein the data block layer, network exchange layer, platform framework layer, and decentralized application layer are deployed in any node; the cross-domain layer is deployed in Public nodes responsible for maintaining two or more blockchain networks.
The blockchain system according to claim 3, wherein the same level between any nodes and data operations at the same level are deployed through distributed applications; data operations at different levels within a node are deployed through different applications.
The blockchain system according to claim 1, wherein the data block layer is connected to the network switching layer through a data interface;

The nodes deployed as the data block layer send the generated transaction information to the network exchange layer;

A node deployed as a data block layer also receives and reads transaction information from the network exchange layer through a data interface, and stores the transaction information in a memory.
The blockchain system according to claim 1, wherein the network switching layer is connected to the platform frame layer through a network interface.
The blockchain system according to claim 1, wherein the platform framework layer is connected to the decentralized application layer through a contract interface and / or an application programmable interface;

An application in the decentralized application layer uses the platform framework layer as a development environment, and accesses the platform framework layer through the application programmable interface;

If the transaction information generated by the data block layer includes smart contract information, the smart contract information is also sent to the platform framework layer through the contract interface to process the transaction information through an application program.
The blockchain system according to claim 1, wherein the decentralized application layer is connected to the cross-domain layer through an application interface;

The transaction server in the cross-domain layer invokes applications in the decentralized application layer through the application interface to implement cross-chain transactions.
The blockchain system according to claim 1, wherein the cross-domain layer is further connected to the platform framework layer through a contract interface and / or an application programmable interface;

When the cross-domain layer implements cross-chain transactions, it provides a cross-chain smart contract to the blockchain platform in the platform framework layer through a contract interface.
The blockchain system according to any one of claims 1-9, wherein each of the access chain nodes belongs to the plurality of blockchain networks connected to the public chain, and the blockchain network connected to the public chain includes Sub-chains, industry chains, and alliance chains based on public chain node interface specifications, as well as third-party public, industry, alliance, and private chains.