区块链侧链是什么意思,区块链的侧链

近几年，区块链技术被广泛应用，其中，区块链侧链也受到了关注。那么，什么是区块链侧链呢？

区块链侧链是一种基于区块链技术的分布式账本技术，它是一种独立的、去中心化的、可信赖的数据库系统。它可以在主区块链上创建一个独立的、可验证的、不可篡改的账本，用于存储某些特定的数据，以及记录特定应用的交易信息。

与主链不同，区块链侧链具有自己的特点：

1. 安全性：与主链相比，区块链侧链的安全性更高，因为它不受主链的影响，可以独立运行。

2. 扩展性：区块链侧链可以支持更多的应用，更多的交易，比主链更有优势。

3. 性能：侧链的交易速度更快，可以支持更多的交易，比主链更有优势。

4. 成本：与主链相比，区块链侧链的成本更低，可以降低系统的运行成本。

总的来说，区块链侧链拥有更高的安全性、更好的扩展性、更快的交易速度以及更低的运行成本，是一种有效的、可靠的数据库系统。

区块链侧链在实际应用中有什么作用呢？

1. 改善交易效率：区块链侧链可以改善交易效率，因为它可以支持更多的交易，更快的交易速度，更低的运行成本。

2. 改善数据安全：区块链侧链可以改善数据安全，因为它可以提供更高的安全性，更可靠的数据库系统。

3. 改善应用扩展性：区块链侧链可以改善应用扩展性，因为它可以支持更多的应用，更多的交易，更有优势。

总的来说，区块链侧链可以改善交易效率、改善数据安全、改善应用扩展性，是区块链技术的重要组成部分，有助于提高区块链技术的安全性和可靠性。

Ⅰ Chain classification of blockchain

Two days ago, a friend asked many questions about blockchain on WeChat. One of the questions was about blockchain. How to classify chains. Blockchain can currently be divided into four categories: public chain, private chain, alliance chain and side chain. Beijing Muqi Mobile Technology Co., Ltd., a professional blockchain outsourcing development company, welcomes discussions for cooperation. The following will help you understand the characteristics of these blockchain chains and how to apply them. I hope it will be helpful to you.

1. Public chain - everyone can participate

Public chain means that anyone can read it, anyone can send transactions, and transactions can be effectively confirmed A blockchain in which anyone can participate in the consensus process.

The public chain adopts the proof-of-work mechanism (POW), proof-of-stake mechanism (POS), and share authorization proof mechanism (DPOS), and combines economic rewards and encrypted digital verification. And establish a principle that the economic rewards that each person can obtain are proportional to the workload. These blockchains are often considered to be completely decentralized.

Features:

1. Open source, because the operating rules of the entire system are open and transparent, this system is an open source system; 2. Protect users from the influence of developers, in the public domain Program developers in the chain have no right to interfere with users, so the blockchain can protect users who use the programs they develop; 3. The access threshold is low and anyone with sufficient technical capabilities can access it, that is, as long as there is a computer that can connect to the Internet Computers can meet the access conditions; 4. All data is public by default, although all associated participants hide their true identities. This phenomenon is very common. They generate their own security through their public nature, where every participant can see all account balances and all their transaction activity.

Case: There are many familiar figures in the public chain: BTC, ETH, EOS, AE, ADA, etc.

2. Private chain - rights are in the hands of a few people

A private chain refers to a blockchain whose write permission is only in the hands of one organization. Read permissions are either open to the public or arbitrarily restricted. Relevant applications include database management, auditing, and even a company. Although in some cases it is desirable to have public auditability, in many cases public readability is not necessary.

Features:

1. Fast transaction speed. The transaction speed of a private chain can be faster than any other blockchain, or even close to not being a blockchain. the speed of a regular database. This is because even a small number of nodes have a high degree of trust, and each node does not need to verify a transaction. 2.Good privacy, giving better privacy protection Private chain makes the data privacy policy on that blockchain exactly the same as in another database; no need to deal with access permissions and use all the old methods, but at least, this The data is not publicly available to anyone with an internet connection. 3. Low transaction costs. Transaction costs are significantly reduced or even zero. Transactions can be carried out completely free or at least very cheaply on the private chain. If one entity controlled and processed all transactions, they would no longer need to charge fees for their work.

Case: The Linux Foundation, R3CEV Corda platform, and Gem Health network’s Hyperledger project are either developing or using private chains.

3. Alliance chain - partial decentralization

The degree of openness and decentralization of the alliance chain is limited. The participants are screened out in advance or designated directly. The read permission of the database may be public, or it may be limited to the participants of the system like the write permission.

Features:

1. Low transaction costs, transactions only need to be verified by a few trusted high-computing nodes without the need for confirmation by the entire network; 2. Nodes Easy to connect, if something goes wrong, the consortium chain can be quickly repaired through manual intervention, and allows the use of consensus algorithms to reduce block times, thereby completing transactions faster; 3. Flexible, if necessary, run a private blockchain community or Companies can easily modify the rules of this blockchain, revert transactions, modify balances, etc.

Case: Ripple has established an alliance chain for international remittances between Japan and South Korea and inter-bank remittances in Japan. At the same time, Xunlei Link, which has been popular for a while, is also a semi-open alliance chain.

4. Side chain - extended protocol

Strictly speaking, "side chain" is not a blockchain itself, but can be understood as an extension of the blockchain. Protocol. The early "side chain" was to solve the limitations of Bitcoin blockchain technology. Side chains are like pathways that connect different blockchains to each other to achieve the expansion of the blockchain. Side chains Completely independent of the Bitcoin blockchain, but the two ledgers can "interoperate" and interact.

Features:

1. Independence, side chain The advantage of the architecture is that the code and data are independent, which does not increase the burden on the main chain and avoid excessive data expansion. The side chain has an independent blockchain, an independent trustee or witness, and an independent node network, that is, a The blocks generated by the side chain will only be broadcast among all nodes where the side chain is installed. 2. Flexibility. All blockchain parameters of the side chain can be customized, such as block intervals and block rewards. ,Advanced users can also modify the consensus algorithm, including where transaction fees go.

Case: LSK, RDN, ARDR and other currencies use side chain technology.

For the entire digital currency field, this year may still be a competition for the underlying public chain projects. The reason is that the current public chain as the infrastructure of the blockchain still has obvious shortcomings and cannot be realized yet. Truly safe, reliable and efficient. This also obviously restricts the development of the entire blockchain industry.

II The difference between the main chain and the side chain in the blockchain

According to the degree of independence of the blockchain network, it is divided into two types: main chain and side chain. The difference between the two is as follows:

1. The main chain refers to a blockchain network that is officially online and can operate independently. The main chain is also called the main network and the mother chain. Simply put, it is the mother of all chains. The chain that can generate chains is called the parent chain.

2. Compared with the concept of the main chain, the side chain can be called a side chain as long as it abides by the side chain protocol and anchors a node on the main chain.

There is a cooperative relationship between the main chain and the side chain. The main chain is like the larger gear in a bicycle. It is an independent blockchain network that does not require power from other gears and can turn on its own.

Ⅲ What are public chains, private chains, alliance chains and side chains

The degree of decentralization of public chains. This kind of public blockchain, represented by Bitcoin and Ethereum, is not controlled by third-party organizations. Everyone in the world can read the data records on the chain, participate in transactions, and compete for the accounting rights of new blocks.
Program developers have no right to interfere with users. Participants (i.e. nodes) can freely join and exit the network and perform relevant operations as they wish.
Private blockchain is the complete opposite. The writing permissions of the network are fully controlled by an organization or institution, and the data reading permissions are regulated by the organization and are either open to the outside world or have a certain degree of access restrictions.
To put it simply, it can be understood as a weakly centralized or polycentralized system. Since there are strict restrictions and few participating nodes; compared with public chains, private chains take a relatively shorter time to reach consensus, faster transaction speeds, higher efficiency, and lower costs.
The alliance chain is a blockchain between the public chain and the private chain, which can achieve "partial decentralization".
Each node on the chain usually has a corresponding entity or organization; participants join the network through authorization and form an alliance of stakeholders to jointly maintain the operation of the blockchain.

IV What are public chains, private chains, alliance chains and side chains

Blockchains are strictly defined into three types: public chains, private chains, and alliance chains . The core difference between these three types of blockchains is the degree of openness of access rights, or the degree of decentralization. Generally speaking, the higher the degree of decentralization, trust and security, the lower the transaction efficiency.

At present, the more reliable ones include Heshu Chain, Ant Chain, etc.

In general, each type of blockchain has its own specific model and value. It cannot be said which one is better. As long as whoever solves the needs is valuable.

IV The difference between the main chain and the side chain in the blockchain

Usually blockchains, especially public chains, have mainnets and testnets. The main network is a trusted blockchain network recognized by the blockchain community, and its transaction information is recognized by all members. Valid blocks will be appended to the main network's block ledger after consensus on the blockchain network.
Many people don’t understand what sidechains are. This concept comes from the Bitcoin community and was proposed in December 2013. There are some questions about whether its birth is due to Bitcoin itself or the mechanism of a certain blockchain. But if you modify it directly on the Bitcoin protocol or chain, it is easy to make mistakes. And because Bitcoin blocks are constantly being operated, if something goes wrong, the amount of funds involved will be huge, and this is not allowed.
Sidechains actually do not refer to a specific blockchain, but all blockchains that comply with the sidechain protocol. This term is relative to the main chain of Bitcoin.
For more information, browse what is a side chain

VI What is the Tianping chain side chain

The Tianping chain side chain is a social organization led by the China Electronics Chamber of Commerce Blockchain Professional Committee resources and jointly build a judicial collaboration system.
Public information shows that the Beijing Internet Court "Tianping Chain" went online on September 9, 2018. So far, it has attracted access from 23 application units in 9 categories including technical services, application services, intellectual property, and financial transactions. The construction and operation of "Tianping Chain" has realized the new model of "Tianping Chain 2.0" integrating the three chains of "business chain, management chain and ecological chain" through social participation and social co-governance, creating a A judicial alliance blockchain with high social influence, high industrial participation, and high security and credibility.
Li Yinke, secretary-general of the Blockchain Professional Committee of the China Electronics Chamber of Commerce, said that the "Tianping Chain" side chain has been created for Internet dispute cases, especially small and micro financial cases, through the application of blockchain, big data, artificial intelligence and other technologies. A new model of using chains to manage chains. As a judicial collaboration system, the "Tianping Chain" side chain will release judges from the trial pressure of massive online dispute cases and improve the collaborative efficiency of judicial services.
According to reports, the "Tianping Chain" side chain focuses on building source prevention first, dispute resolution in advance, point-to-point asset inspection and freezing, and a new credit and punishment system for small and micro financial cases. In the future, the "Tianping Chain" side chain will use blockchain technology to open up data sharing between financial institutions and Internet platforms through the side chain ecosystem. When financial business occurs, financial institutions will upload evidence to the chain in accordance with the "Tianping Chain" evidence rules. After a dispute occurs, the smart contract on the chain is triggered to send an electronic lawyer's letter, similar case reminder, etc. for resolution and disposal.Resolve disputes before they enter judicial proceedings.

Ⅶ What are side chains and main chains in blockchain

Main chain: that is, an officially launched, independent blockchain network. It can be said that the entity that stores data in the blockchain is generally considered to be the main chain network itself. For example, BTC mainnet, ETH mainnet and EOS mainnet are all main chains.

Sidechain: First of all, the essence of the sidechain protocol is a cross-blockchain solution. Simply put, this solution allows data information to be transferred between two blockchains. Sidechains were originally proposed to enable the transfer of Bitcoin and other digital assets between multiple blockchains.

In layman’s terms, side chains are like pathways that connect different blockchains to each other to achieve the expansion of the blockchain. The side chain is completely independent of the main chain, but the two ledgers can "interoperate" and achieve interaction.

Sidechain protocol - Sidechain protocol refers to (taking Bitcoin as an example): it allows Bitcoin to be safely transferred from the Bitcoin main chain to other blockchains, and from other blockchains A protocol for securely returning to the Bitcoin main chain. The same goes for exchanging Bitcoin for Ethereum or other blockchains. So, why do we need side chains, or what are the benefits of side chains?

The functions that the main chain lacks are provided by the side chain.

For example, the Bitcoin network does not have the function of smart contracts, but this function can be realized through side chains.

If the operation efficiency of the main chain is low, some functions of the main chain can be transferred to the side chain for implementation.

For example, the transfer speed of the main chain is very slow and there is no way to meet daily payment needs. We can develop the Lightning Network as a side chain to meet daily payments. Also due to low performance, Ethereum cannot support large-scale commercial-level DAPPs (decentralized applications), which can be achieved through side-chain development.

If you put aside the technical rigor, you can use another simpler way to understand the side chain. All networks that provide support or services for the original main network can be called side chains. No need to Care about whether this side chain uses blockchain technology. For example:

Third-party payment network (Alipay/WeChat), you can think of the bank network as the main chain, and third-party payment is a side chain.

Cryptocurrency trading considers free networks such as Bitcoin and other virtual currencies as the main chain, and the exchange can be regarded as a side chain.

RSK and Loom are separately developed side chains for the Bitcoin and Ethereum main chains respectively.

In the first application, the main chain and side chain are centralized

In the second application, the main chain is decentralized and the side chain is Centralized

The third application, the main chain is decentralized, and the side chain is also decentralized. With the deepening of blockchain technology, we can see that peopleSuch value exchange activities will slowly transition from the first application to the third application.

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ⅧWhat is the side chain in the blockchain?

Dumb: Xiaoxing, I recently saw that you have changed your simple style from the past, and you are very bright and beautiful. Where did you get rich? .

Xiaoxing: It’s okay, it’s okay. I’ve been living with a wealthy family recently, and it’s nice to enjoy the shade under the big tree.

Dumb: Who is a rich man? He is being taken care of, haha...

Xiaoxing: What are you talking about? Am I that kind of person? I am a horse for BTC. Zai, um, the name Ma Zai doesn’t sound good, I will make a “side chain” for BTC.

1. What does a side chain do?

Dumb: Ma Zai is Ma Zai, what is called "side chain"? What can you, Ma Zai, do for BTC?

Xiaoxing: The services provided for BTC are mainly “mortgage loan services” to expand the business scope and influence of BTC.

Dumb: "Mortgage loan service", how do you play this?

Xiaoxing: It is actually an asset transfer. You mortgage your BTC to me, and I will give you the corresponding value of Xiaoxing coins, referred to as XB. You can use XB to do other things. If you put Return XB to me, and I will return BTC to you.

2. Sidechain and BTC service process

Dumb: It sounds interesting, but I still don’t understand what’s going on. Please explain it in detail.

Xiaoxing: Listen to me slowly. One of my important functions is payment verification (SPV) proof. BTC and XB are symmetrical two-way anchoring, and BTC and XB are independent of each other. The steps are as follows:

Xiaoxing: My relationship with Bitcoin can be seen in the picture below

Xiaoxing: Let me emphasize that the transfer of assets between BTC and XB is real. Make a white note. Of course, I am not the only one who can work for BTC, there are many other horses. If there is a problem with one horse, it cannot affect the other horses.

3. Why side chains are needed

Dumb: Xiaoxing, aren’t you just swapping with BTC? Why should I use you?

Xiaoxing: You don’t understand this, IThe XB currency is bound to BTC. What do you do with BTC transfers? The transfer is slow, you have to wait for a long time, and the handling fee is expensive. But it is different when you use my XB. I can make the transfer quickly and there is no handling fee. If you don’t need it anymore, you can exchange it back to BTC, and I can provide more convenient services.

Xiaoxing: Dumb, do you know that the rules of BTC have been relatively fixed and it is difficult to make major changes in them. Modifications will lead to forks. If you want to innovate or expand on the Bitcoin platform, It's quite difficult.

Dumb: Xiaoxing, as you said, your functions are so good, why are you not independent? Do you have to be a pawn for BTC? It’s so fun to play by yourself, and you are not restricted by BTC.

4. Why does the side chain need to be attached?

Xiaoxing: Sigh, I am a new token, XB Coin, that needs no one, needs fame but has no reputation, and wants to let If you believe me, you have to walk a long way, but it may not be possible.

Dumb: Looking at you in such a bad way, others really can’t believe it.

Xiaoxing: Hehehehehehehe, but it’s different if I hook up with BTC and act as a pawn for him. I am linked to BTC and use BTC as a reserve to issue XB coins, which can complete the value of XB coins. Recognition, isn't it a bit like the gold standard?

Dumb: That’s true, you have a smart mind.

Xiaoxing: Haha...

Summary

The side chain protocol can transfer Bitcoin out of the lock and develop a second-generation blockchain. Ensure the security of the Bitcoin blockchain, and secondly, cope with the impact of second-generation coins, and achieve commercialization for different application scenarios. Side chains can be applied not only to BTC, but also to other public chains.