What is the underlying technology of the Dagong Chain?

Blockchain technology is considered to be the fifth core technology that has the most potential to trigger a subversive revolution in productivity and production relations after steam engines, electricity, information, and Internet technology. Since the birth of the blockchain technology represented by Bitcoin in 2009, the technology has achieved considerable development and more and more attention and recognition, especially in recent years, blockchain technology has become the focus of global attention.

Researchers and developers in the blockchain industry have carried out all-round explorations at various levels, from the realization of the underlying core technology to on-chain applications to the application of various scenarios. However, looking at the entire development process of the blockchain technology, the current stage of the block There is still a large gap between large-scale practical use of chain technology, especially the underlying core technology of the blockchain has not yet achieved a major breakthrough, and there are still many technical difficulties to be overcome. The various types of blockchain scenarios currently underway have been applied to a large extent. The foundation is unstable, and it is difficult to achieve practical results. Therefore, it is urgent to conduct research and development on the underlying infrastructure of the blockchain to provide reliable support for various types of blockchain applications, thereby promoting the real application of blockchain technology in various fields and industries. To make the disruptive technology of blockchain serve human society faster and better.

The Shanda public chain STD aims to provide global value Internet infrastructure, and the practicality of existing blockchain infrastructure is relatively low, especially transaction congestion, high transaction fees, transaction confirmation time, and resistance to quantum attacks. Weakness, low anonymity of communication layer nodes, protection of transaction anonymity, weak cross-chain communication and multi-chain fusion capabilities, large storage space, and other issues and requirements. Optimize and improve the protocols and mechanisms of blockchain technology at all levels to realize value. Supporting protocols at all levels of the transmission network, as a true blockchain 4.0 infrastructure, provide infrastructure for various value transmission applications, provide a low-level development platform for various types of DApp development, and provide a realistic and feasible technical approach for building a global value Internet.

Shanda Public Chain STD supports the construction of various applications on the chain, including anonymous network communication, computing power sharing, storage space sharing, bandwidth sharing, credit sharing (credit guarantee), and provides open interfaces for third parties to develop DApps. In practical application scenarios, we cooperate with various service providers and application providers to support commercial organizations and government agencies to build public, alliance, and private chain application systems according to their own business characteristics and needs, thereby applying the Shanda public chain STD to various types of applications. In actual application scenarios.

What unknown advantages does Shanda Public Chain STD have? In order to satisfy the curiosity of many small partners in the industry, World Chain Finance specially invited the chief consultant of Shanda Public Chain. Li Dalai answered questions for everyone. What exactly is the underlying technology of STD Shanda Public Chain? Next, let's take a look at the live broadcast room together!

The following is the live recording of the interview, edited by World Chain Finance:

World Chain Finance: Hello everyone, I'm Zhang Ying today's host.

This live broadcast will be synchronized to hundreds of communities in WorldChain, aiming to let everyone truly understand the underlying technology of the STD Grand Public Chain. Next, let us ask Mr. Li Da, the chief consultant of Shanda Public Chain, to say hello.

Li Da: Hi everyone, this is Li Da. I am very happy to share with you here. Let us have a good afternoon together.

[The first question of World Chain Finance]

World Chain Finance: Mr. Li Da, welcome to the live broadcast of World Chain. What are the main problems of current blockchain technology? Trouble with your own understanding.

Li Da: The current problems of the blockchain are mainly the following:

1) Low performance.

Low performance is one of the main challenges facing the current blockchain technology. The blockchain used by Bitcoin can theoretically only process up to seven transactions per second. Ethereum has improved slightly, but it is far from meeting application requirements. As of December 2017, a simple DApp application, CryptoKitties, will slow Ethereum transaction throughput and significantly increase transaction fees. Consumer applications today must be able to handle tens of millions of active users every day. In addition, some applications are only meaningful when meeting a certain transaction throughput, so the platform itself must be able to handle a large number of user concurrency. Time transaction delays will hinder users' use, making the applications built on the blockchain less competitive with existing non-blockchain alternatives.

2) The use threshold is high.

Today's blockchain applications are built for the few techies who know how to use blockchain, not mainstream consumers. Almost all blockchain applications require users to run full or light nodes of the blockchain. Higher learning costs have severely hindered the progress of blockchain to the masses. For example, the Ethereum-based game CryptoKitTIes may be the easiest DApp ever, but it still requires users to install the Metamasklightwallet browser extension, and users also need to know how to securely purchase Ethers and use it with Metamask, which greatly Affect the user experience. To attract widespread use by the general public, blockchain applications should be as simple as today's Internet and mobile applications.

3) High cost of use.

The high use cost of blockchain technology is another major obstacle preventing it from becoming a mainstream application, and it also limits developers who need to build free services flexibly. In contrast to the Internet, blockchain technology should be able to support free applications. Making blockchain free is the key to its widespread adoption.

A free platform will also enable developers and businesses to create valuable new services.

What is the underlying technology of the Dagong Chain?

4) Platform locked.

As in the early days of any computer technology, there is a serious "platform lockup" problem with blockchain. Developers must first decide which blockchain to adopt, and then write code for that particular platform, which makes it very difficult to switch applications to other blockchains. Developers do not want to be locked into a certain blockchain technology, but need these applications to be able to run on multiple platforms to improve the efficiency of development reuse.

5) The application range is narrow.

At present, people have high expectations for the blockchain, especially with the increasing price of encrypted digital currencies, major news media have drawn a very beautiful blueprint for the blockchain. But in fact, blockchain technology is still in its infancy, and most blockchain services lack rich functions and have a narrow application range. There is also a lack of corresponding incentive mechanisms in the blockchain development community. Therefore, there is an urgent need to conduct research on the underlying protocol of the blockchain, overcome the underlying core blockchain technology, redesign or improve each dimension of the blockchain technology level, and resolve and meet transaction congestion, high transaction fees, transaction confirmation time, Weak quantum attack resistance, low anonymity of node communication, lack of transaction anonymity protection, weak cross-chain communication and multi-chain fusion capabilities, large storage space, etc. Mechanism, to achieve a truly practical support agreement at all levels of the value transmission network, to provide infrastructure for various types of value transmission applications, to provide a low-level development platform for various types of DApp development, and to provide a realistic and feasible technical approach for building a global value Internet.

Shanda Public Chain STD was invested and created by the Singapore Creation Foundation. STD aims to build a practical blockchain 4.0 value interconnected blockchain infrastructure, focusing on the blockchain infrastructure and platform layer core technologies, with an original fully distributed anonymous P2P network communication protocol, and a new type of quantum attack-resistant cryptographic hash algorithm And signature algorithms, original two-layer consensus and mining mechanism, support for transaction anonymity protection, Turing-complete smart contracts and other features. Adopt a fair distribution mechanism to support third-party asset issuance, cross-chain communication, multi-chain fusion and other functions. Chain, alliance chain, private chain and other forms have landed in actual application scenarios. STD aims to give full play to the potential of blockchain technology. With the help of advanced technologies such as AI, big data, cloud computing, 5G, and the Internet of Things, STD will digitally transform industrial resources, precisely match them, and circulate widely to promote the digitalization of the global physical industry and realize the physical The comprehensive digital upgrade of the industry empowers and leads the future digital economy era.

[Second Question from World Chain Finance]

World Chain Finance: OK, so what is the goal of STD?

Li Da: Build a universal blockchain 4.0 infrastructure that is universal, complete with supporting functions, high performance, easy to use, good user experience, and scalable, and build a blockchain 4.0 ecosystem that supports various on-chain applications.

To this end, STD has made great improvements to all levels of the blockchain infrastructure, and proposed breakthrough innovations at some levels. STD's main technological innovations include:

1. At the underlying P2P network node communication level, combining the advantages of the existing Tor-based anonymous communication network and blockchain-based distributed VPN to achieve an original anonymous P2P communication network, design and implement a method for anonymous access to nodes, and It implements a private encrypted communication protocol, which greatly enhances the anonymity of nodes in the underlying communication network and ensures that communication between nodes is difficult to track and crack.

2. At the level of the underlying data structure, a new type of data structure is adopted, an enhanced directed acyclic graph (DAG)-HashNet (HNNet), so as to achieve asynchronous parallel event consensus verification and improve the system's availability. Scalability.

3. At the level of distributed consensus mechanism, a safe and efficient two-layer consensus mechanism is designed. Based on the enhanced DAG HashNet consensus and the Byzantine negotiation (BA-VRF) consensus based on a random selection function, the consensus mechanism has high concurrency, The fast transaction confirmation speed can quickly build an ecosystem for different application scenarios.

4. At the level of anti-quantum attack, a new type of anti-quantum attack cryptographic algorithm is adopted, which reduces the quantum by replacing the ECDSA signature algorithm with the NTRUsign signature algorithm based on integer lattice, and replacing the existing SHA series algorithms with Keccak-512 hash algorithm Threats from the rapid development of computing and the gradual popularization of quantum computers.

5. At the level of anonymous transactions, combining the characteristics of crypto virtual currencies such as Monero and ZCash, through a one-time key and ring signature technology, a transaction anonymity and privacy protection method with high cost-effectiveness and excellent security is designed, and Support zero-knowledge proof as an optional function to meet the privacy protection needs of different application scenarios.

6. At the smart contract level, by implementing the Moses Virtual Machine (MVM), it supports declarative non-Turing complete smart contracts and advanced Turing complete smart contracts for the Moses language. The advantage is that it supports better off-chain support. Data access, support for the issuance of third-party assets, can be implemented in actual application scenarios in the form of public chain, alliance chain, private chain, etc.

7. At the cross-chain communication and multi-chain fusion level, the relay chain technology is adopted to implement cross-chain communication and multi-chain fusion functional modules as a single layer of overlay, which can maintain the independence of cross-chain operations and reuse STD. Various functions of the basic chain.

8. At the level of ecological incentives, a variety of Token distribution methods and methods are comprehensively used, and double-layer mining is supported for ecological incentives.

9. At the industry application level, through the development of JSON-RPC industry common interfaces such as circulation payment, data transmission, data search, contract invocation, etc., it supports various upper-layer applications.

[The third question of World Chain Finance]

World Chain Finance: Can you tell us about the STD ecosystem?

Li Da: Shanda Public Chain STD fully absorbs the advantages of existing Blockchain 1.0, Blockchain 2.0 and Blockchain 3.0 projects, solves their outstanding problems and technical defects, and builds a more prosperous application ecosystem. STD innovatively designed the on-chain and off-chain data mapping mechanism, a new enhanced data structure based on directed acyclic graph (DAG) and hash network (HashNet), a two-layer consensus mechanism based on HashNet consensus and BA-VRF consensus, and the introduction of external triggers Advanced Turing-complete smart contract with conditions, Keccak512 hash algorithm based on quantum-resistant attack and NTRUSign signature algorithm, anonymity protection mechanism based on ring signature and zero-knowledge proof transaction, fast transaction confirmation, anti-quantum attack, node anonymous communication, transaction anonymity The functional features of blockchain 4.0, such as protection, advanced smart contracts, and data on-chain, and by adopting a fair distribution mechanism, it supports third-party asset issuance, cross-chain communication, and multi-chain integration.

[The fourth question of World Chain Finance]

World Chain Finance: OK, so what is STD's vision?

Li Da: Build a global value Internet, provide a basic blockchain network for various value transmission applications, and support various practical applications to land in the form of public, alliance, and private chains. In specific applications, STD performs hash calculations on specific application scenario data. The hash value is stored on the STD public chain. The application scenarios are not limited to digital currency applications represented by Bitcoin in the context of blockchain 1.0, and are not limited to districts. In the financial field where digital currency and smart contracts are combined under the background of Blockchain 2.0, and not limited to the application attempts of Blockchain 3.0 in the fields of government, health, culture, and art; STD-based public blockchain 4.0 will become more The infrastructure of each industry forms a perfect industry ecosystem based on the blockchain, while integrating advanced technologies such as AI, big data, cloud computing, 5G, and the Internet of Things, to achieve social-level data sharing, improve industry efficiency, and reduce social transactions Cost, stimulate the vitality of the social unit, construct a new form of business and credit environment, digitally transform industrial resources, precisely match, and circulate widely, promote the digitalization process of the global physical industry, achieve a comprehensive digital upgrade of the physical industry, and widely and profoundly change people Lifestyle.

[Fifth Question from World Chain Finance]

World Chain Finance: OK, next, please tell us about the advantages of Shanda Public Chain Project.

Li Da: Shanda Public Chain STD is a self-evolving ecosystem. The project absorbs the advantages of existing blockchain 3.0 projects and is committed to building the 4.0 era infrastructure. It mainly draws on IOTA and Byteball using DAG data structures and is currently working on The advantages of the developed Hashgraph project, and by adopting an innovative two-layer consensus mechanism, designing and using cryptographic algorithms with anti-quantum attack characteristics, designing and implementing a new consensus mechanism based on HashNet to solve all types of existing blockchain infrastructure Problems to build a more prosperous application ecosystem.

Shanda public chain STD has the following advantages:

1. The design is positioned as a practical blockchain 4.0 infrastructure with advanced technical characteristics. It is a blockchain 4.0 infrastructure that supports the large-scale popularization and practical application of blockchain technology.

2. The STD team has a reasonable mix and division of labor, strong technical research and development capabilities, strong marketing capabilities, and strong scene landing capabilities, which can ensure that STD realizes various characteristics of the design.

3. Applications on the blockchain built on STD are rapidly advancing. Currently, STD-based distributed social platforms and STD-based global distributed storage grids are being planned and developed. In addition, the team is also planning a killer on-chain application with a large user base.

4. STD team as a technology provider, has now