SixDomainChain (SDChain) is the world's first decentralized public blockchain ecosystem that integrates the international and national standards of the "Six Domain Model" of the Internet of Things and the distributed blockchain reference architecture standard. The characteristics of networking technology and the needs of business ecological construction, in digital asset issuance, user credit identity management, P2P communication, encryption algorithm, consensus algorithm, smart contract, cross-chain contract mode, market-oriented consensus incentives, decentralized DApp (Distributed Applications), new In terms of fast business access and other aspects, deep optimization is carried out on the basis of the existing blockchain technology to realize the seamless integration of the bottom layer of the blockchain and the application ecology of the Internet of Things, so as to ensure the benign, fast and sustainable business ecology of the Six Domain Chain Development, realize the symbiosis and co-prosperity of currency, chain and industrial Internet of things, create a blockchain ecosystem of trusted digital assets of the Internet of Things, efficiently realize the circulation and value transformation of credit digital assets, and create a global ecological integration of the Internet of Things and blockchain benchmark.

Design concept and construction goals

The international standard architecture of the "Six Domain Model" of the Internet of Things provides important reference value for the construction of the Internet of Things application ecosystem and the establishment of business closed loops in different industries, which will help accelerate the development of the Internet of Things industry and build a more To optimize the industrial chain division of labor and application ecology. However, in terms of credit system construction and value system construction, the comprehensive integration and support of decentralized blockchain is still needed. According to the characteristics and business needs of different types of users in the six-domain model of the Internet of Things, SDChain includes Internet of Things business users, Internet of Things device users, Internet of Things service platform users, Internet of Things operation and maintenance, and supervision platform users , third-party business cooperation users, asset owner users, etc., in digital asset issuance, user credit identity management, P2P communication, encryption algorithm, consensus algorithm, smart contract, cross-chain contract mode, market-oriented consensus incentives, decentralized DApp In terms of fast access to new services and other aspects, deep optimization is carried out on the basis of the existing blockchain technology to ensure the benign, rapid and sustainable development of the six-domain chain business ecology, and to realize the symbiosis of coins, chains and industrial Internet of Things Prosperity, efficiently realize the circulation and value transformation of credit digital assets, and create a global benchmark for blockchain and the Internet of Things to promote the development of real society.

Application scenario

1) Focusing on the application needs of specific industries and based on the reference architecture of the six-domain model of the Internet of Things, promote the establishment of DApps in different industries, such as the Agricultural Internet of Things, Industrial Internet of Things, Energy Internet of Things, etc., to provide digital data for each DApp Asset issuance, as well as providing digital credit identity registration and management on the six-domain chain for various user subjects in the six domains of the Internet of Things, data uploading, data confirmation, data query, smart contract setting, smart contract triggering, A series of services such as automatic account distribution ensure the consistency, authenticity and non-tampering of data, establish an asymmetric credit mechanism-ACM between people and things, and ensure the security, effectiveness and value interconnection of data assets.
2) Six-domain chain digital asset token - SDA is issued in a fixed amount, which is used for digital asset circulation transactions, accounting consumption and consensus rewards on the six-domain chain, as well as application ecological incubation, community building, business cooperation, market promotion, etc. . With the continuous prosperity of the six-domain chain business ecology, the coin, the chain, and the industrial Internet of Things are co-existing and co-prosperous, and their respective values ​​and benefits are continuously enhanced.
3) Based on a large number of block-based encrypted data resources on the Six-Domain Chain, establish a win-win ecosystem for cooperation, continuously tap potential value, incubate innovative applications, and drive IoT technology and artificial intelligence innovation, IoT financial service innovation, and items Efficient and coordinated development of supply chain traceability service innovation and market service innovation.

Architecture and technical solutions

The IoT system based on the "six-domain model" effectively classifies users for the six-domain chain, mainly including users (individuals, enterprises, governments), asset owners, and IoT operation service providers , Internet of Things equipment, different business entities in the industrial chain (equipment suppliers, online e-commerce, financial institutions, logistics companies, etc.), etc. According to the above-mentioned user characteristics and blockchain business characteristics, the bottom layer of the Six Domain Chain is modularized to achieve multi-dimensional, multi-role security protection, data privacy and confidentiality, distributed data storage, trusted data asset access and transactions etc., providing a strong underlying guarantee.
Investigating the composition of the blockchain system from the functional perspective of the blockchain, a functional view of the reference architecture of the six-domain chain is proposed. The functional view describes the typical functional components of the six-domain chain system through the hierarchical structure of "four horizontal and four vertical", as shown in Figure 3. Specifically, it includes user layer, service layer, core layer, base layer and cross-layer functions.
The user layer is the user-oriented entrance, through which management functions related to customers are performed, and blockchain services are maintained and used. The user layer can also output blockchain services to other resource layers, providing Support for cross-layer blockchain services;
The service layer provides services such as unified access and node management, providing users with reliable and efficient service capabilities;
The core layer is the core functional layer of the blockchain system, including Modules such as consensus mechanism, timing service, privacy protection, encryption, digest and digital signature are introduced. In addition, according to different application scenarios, smart contract modules that can automatically execute preset logic can be selectively added;
The base layer provides the basic operating environment and components required for the normal operation of the blockchain system, such as data storage, Run containers, communication networks, and more.
At the same time, in order to meet the needs of blockchain production research and operation, the functional view also includes four cross-layer functional systems of development, operation, security, supervision and auditing. The functional components contained in the four systems are consistent with the above three layers. Components interact to provide support for the system.

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