Bitcoin side chain docking with main chain

1. The degree of decentralization of public chain. This kind of public blockchain, represented by bitcoin and Ethereum, is not controlled by a third party. All people in the world can read the data records on the chain, participate in transactions and compete for the bookkeeping rights of new blocks
program developers have no right to interfere with users, and each participant (i.e. node) can freely join and exit the network, and carry out relevant operations according to their wishes
private blockchain is on the contrary. The write permission of the network is fully controlled by an organization or institution, and the data read permission is regulated by the organization, either open to the outside world or with a certain degree of access restrictions
in short, it can be understood as a weakly centralized or multi centralized system. Because the participating nodes are strictly limited and few; Compared with public chain, private chain has shorter time to reach consensus, faster transaction speed, higher efficiency and lower cost
the alliance chain is a blockchain between the public chain and the private chain, which can realize "partial decentralization"
each node in the chain usually has its corresponding entity or organization; Participants join the network through authorization and form a stakeholder alliance to jointly maintain the operation of the blockchain.

2.

An important reason for the popularity of "virtual currency" in China is the lack of multi-level and multi category investment market, which makes many investors choose speculative procts such as "virtual currency"

therefore, China should also pay close attention to the construction of e-money system and virtual currency in line with the background of the times, improve the supervision of the investment market and the new financial technology system, and make good use of financial technology on the premise of preventing financial risks, so that it can better serve the real economy

in the face of the rapid development of Internet Finance and financial technology, relevant departments need to do a solid job in risk prevention and control while encouraging innovation. In order to regulate the development of this virtual commodity better and make its transaction in the market truly based on the use value, we should build special regulatory measures and even institutions for innovation such as "virtual currency" on the existing basis

3. The main chain is the underlying technology foundation of all blockchain applications, just like chips and operating systems. Whoever can become the main chain of the basic layer of the blockchain and accumulate a large number of users and scenes is likely to become the future giants such as apple and Microsoft
however, for most scenarios of using and developing blockchain, it is not necessary to re create a set of blockchain, as long as we develop our own applications based on the existing underlying blockchain or technical framework. Therefore, for the similar encryption algorithm, P2P technology, consensus algorithm, we only need to have a basic understanding, and do not need in-depth study
the primary goal of blockchain application development is to find a relatively mature underlying blockchain for application development. The underlying blockchain needs powerful and easy-to-use development interface or framework, scalability, transaction frequency, etc
Rong technology is a listed financial technology company, which currently provides main chain construction and development services http://www.erong.com/new/blockchain/backbone/index.html

4.

Meituan belongs to BTC type

BTC (business to customer) is one of the categories of e-commerce according to the trading partners, which means the e-commerce of commercial institutions to consumers

this form of e-commerce is generally based on online retail instry, mainly relying on the Internet to carry out online sales activities

BTC is also called B2C. B2C mode is the earliest e-commerce mode in China

extended information:

the payment method of B2C e-commerce is the combination of cash on delivery and online payment, while most enterprises choose logistics outsourcing to save operating costs

with the change of users' consumption habits and the promotion of excellent enterprise demonstration effect, the number of online shopping users is increasing. In addition, some large-scale examinations such as the civil service examination also began to implement B2C mode

its basic needs include user management needs, customer needs and vendor needs

user management requirements: user registration and user information management

customer needs: provide electronic directory to help users search and find the goods they need

compare similar procts to help users make purchase decisions

evaluate goods, add shopping cart, place order, cancel and modify order

be able to pay online; Track the status of the order

seller's needs: check the customer's registration information

process customer orders

complete the settlement of procts purchased by customers and process customer payment

be able to publish commodity information, publish and manage online advertising

establish an interface with the bank for electronic auction

inventory management

establish interface with logistics distribution system

be able to track proct sales

to achieve customer relationship management

provide after-sales service

5. Voting is because the questioner can't tell which question to adopt,

so to ask other friends to vote, the answer with the highest number of votes can let the questioner refer to which one should be adopted most.

participation in voting can also score

6. Bitcoin is simply a virtual currency. 1、 What is bitcoin: the concept of bitcoin was first put forward by Nakamoto in 2009. According to Nakamoto's ideas, open source software was designed and released, and p-2p China network was built on it. Bitcoin is a kind of digital currency in the form of p-2-p. Point to point transmission means a decentralized payment system. Unlike most currencies, bitcoin does not rely on a specific monetary institution to issue. It is generated by a large number of calculations based on a specific algorithm. Bitcoin economy uses a distributed database composed of many nodes in the whole p-2p network to confirm and record all transactions, and uses cryptography design to ensure the security of all aspects of currency circulation. The decentralized characteristics and algorithm of p-2p can ensure that it is impossible to artificially control the value of bitcoin by mass manufacturing. The design based on cryptography can make bitcoin only be transferred or paid by the real owner. This also ensures the anonymity of money ownership and circulation transactions. The biggest difference between bitcoin and other virtual currencies is that the total amount of bitcoin is very limited and it has a strong scarcity. The monetary system had no more than 10.5 million in four years, after which the total number will be permanently limited to 21 million. Bitcoin can be cashed and converted into the currency of most countries. Users can use bitcoin to buy some virtual items, such as clothes, hats, equipment, etc. in Chinanet games. As long as someone accepts it, they can also use bitcoin to buy real-life items. On February 2, 2014, Democratic Senator Joe Manchin of West Virginia sent an open letter to a number of regulatory authorities of the federal government of the United States, hoping that the authorities concerned would pay attention to the current situation of bitcoin encouraging illegal activities and disrupting the financial order, and take action as soon as possible to completely ban the electronic currency. 2、 Generation principle: starting from the essence of bitcoin, the essence of bitcoin is actually a special solution generated by a bunch of complex algorithms. A special solution is one of the infinite (in fact, bitcoin is finite) solutions that can be obtained from the equations. Every particular solution can solve the equation and is unique[ In the metaphor of RMB, bitcoin is the serial number of RMB. If you know the serial number of a note, you have the note. The process of mining is to constantly seek the special solutions of the equations through a huge amount of calculation. The equations are designed to have only 21 million special solutions, so the upper limit of bitcoin is 21 million[ To mine bitcoin, you can download special bitcoin computing tools, register various cooperative Chinese stations, fill in the registered user name and password in the computing program, and then click the operation to officially start[ 9] After completing the installation of bitcoin client, you can directly obtain a bitcoin address. When others pay, you only need to paste the address to others, and you can pay through the same client. After installing the bitcoin client, it will distribute a private key and a public key. You need to back up your wallet data containing your private key to ensure that your property is not lost. Unfortunately, if the hard disk is completely formatted, the personal bitcoin will be completely lost

7.

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

side chain: first of all, the essence of side chain protocol is a cross block chain solution. In short, through this scheme, data information can be transferred between two blockchains. The original proposal of side chain is based on the transfer of bitcoin and other digital assets among multiple blockchains

generally speaking, the side chain is like a channel, connecting different blockchains together to realize the expansion of blockchain. The side chain is completely independent of the main chain, but the two books can "operate with each other" to achieve interaction

side chain protocol - side chain protocol refers to (take bitcoin as an example): it can safely transfer bitcoin from the main bitcoin chain to other blockchains, and also can safely return to the main bitcoin chain from other blockchains. The same is true here for bitcoin to Ethernet or other blockchains. Then, why do we need side chain, or what are the advantages of side chain

the function that the main chain lacks is provided by the side chain

for example, bitcoin network does not have the function of smart contract, but it can achieve this function through the side chain

if the operation efficiency of the main chain is low, some functions of the main chain can be transferred to the side chain

for example, the transfer speed of the main chain is very slow, and there is no way to meet the daily payment needs. We can develop the lightning network as the side chain to meet the daily payment needs. Also because of low performance, Ethereum can not support large commercial DAPP (decentralized application), which can be realized through side chain development

if we put aside the technical rigor, we can use another simpler way to understand the side chain. All the networks that provide support or services for the original primary network can be called side chain, regardless of whether the side chain adopts blockchain technology. For example, the

third party payment network (Alipay / WeChat) can imagine the banking network as the main chain while the third party payment is a side chain.

for cryptocurrency trading, the free network such as bitcoin and other virtual currencies can be regarded as the main chain, and the exchange can be regarded as a side chain

RSK and loom are separately developed side chains for bitcoin and Ethereum main chain

in the first application, both the main chain and the side chain are centralized

in the second application, the main chain is decentralized and the side chain is centralized

in the third application, the main chain is decentralized and the side chain is also decentralized. With the deepening of blockchain technology, we can see the value exchange activities of human beings, It will graally transition from the first application to the third application

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8.

Through the following points to identify whether it is MLM

[three behavioral characteristics of MLM]:

1. Pay or pay the entrance fee in disguise, that is to say, after you pay to join, you can get the "qualification" of withdrawing remuneration and developing offline

2. Directly or indirectly develop offline, that is to say, pull people to join, and form a hierarchy according to a certain order

3. The on-line employees shall be paid from the sales performance of the off-line employees directly or indirectly developed, or the number of employees directly or indirectly developed