Bitcoin side chain
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.
There are two relations between bitcash and bitcoin: bitcash is the bifurcated and competitive currency of bitcoin{ RRRRR}
Second, competitive currency. As the name suggests, they are two competing currencies. It is just like the competition of two kinds of homogeneous goods in the market, competing for market share. In the virtual digital currency market, the market share is so large that more people hold one kind of currency, the number of people holding another kind of currency will be relatively reced, forming a competitive relationship between you and me
in these two relationships, competitive currency is easier to understand, while forked currency is more difficult because it is a technical problem
is the relationship between the two currencies clear now
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
many people don't understand what side chain is. This concept comes from bitcoin community and was put forward in December 2013. There are some problems with the birth of bitcoin itself or the mechanism of a blockchain itself. But if you modify bitcoin protocol or chain directly, it is easy to make mistakes. Moreover, because the bitcoin block has been operating continuously, if it is wrong, the amount of funds involved will be very large, which is not allowed
in fact, sidechains do not refer to a particular blockchain, but to all blockchains that comply with the side chain protocol. This term is relative to the main chain of bitcoin
for more information, what is a side chain
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
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
each data block is set with two flags, one is the creation time, the other is the password proof of the creator. Each added data block will have a time stamp. You can compare the hash value in the blockchain with the hash value of the file in hand to prove that a file exists at that time point. Because bitcoin transaction has strong encryption protection, it can replace the common user name plus password authentication mode. In the system, a bitcoin address can be regarded as a user name, while the private key can be regarded as a password. Anyone who concts bitcoin transactions with you needs to verify whether you have a private key to decrypt
blockchain, the core technology of bitcoin, can shine in many fields, and it also solves the problem of network audit. Metadata can't be deleted once it's put into blockchain. With this important feature, developers have created a new version of twitter, twister, and namecoin, a decentralized domain name registration website Everything we have, everything we do, is managed by a lot of data records, "says Kirby of Factom." banks are a database, so are insurance companies, and the economy is basically a bunch of digital records. You need to make full use of the concept of global accounting general ledger. It will be very exciting if you can put the global data together in this way. " These are just cases where blockchain can be used to change the network storage mode
but storing data is just the tip of the iceberg of blockchain. After all, bitcoin network is not just a trading platform. Behind it, there is a global team of miners, forming a powerful distributed virtual machine system. Their role in the network is obvious. When miners receive requests for transactions, they verify each request. This operation can be very simple, first verify your identity, check whether you have enough bitcoin, and then choose to accept or reject the transaction
what else can miners be asked to do
for example, "don't verify this deal until I die." Or "when you verify the transaction, please adjust the transaction value. The real-time price of Tesla motor's stock is the amount I want to trade." In the first example, the applicant can guarantee the authenticity of the will without relying entirely on the lawyer. The second example shows how to create a distributed stock market. All this shows that the calculations made by the miners can be used for more purposes
bitcoin's existing protocols advocate the use of minimalist programming languages to limit miners to any fancy operations. But developers are constantly discussing whether they can add some new features to the protocol. If bitcoin is not only involved in static computing, it is necessary to add some complexity. In recognition of this, developers added the new function of multiple transactions to it in 2012. This feature allows users to distribute ownership of a bitcoin address to others and set multiple private keys for them. Since then, many companies have begun to offer hosting services based on multiple transactions< However, if we want to change the open source protocol of bitcoin, it will take time and running in to meet the requirements of all parties. Some people say that this running in process will hinder the development of bitcoin There are now five camps: developers, miners, merchants, users and service providers (Internet wallets). It will take the five parties to reach a consensus to achieve major changes in the agreement. " Andreas antonopoulos, author of bitcoin user's guide, said, "it's hard to make any radical changes now. The possibility of great changes has graally diminished."
but developers are still trying to optimize blockchain. In order to alleviate the problem that programmers add blockchain too long, there is a possible solution. Adam back initially proposed to use hash function as the security of bitcoin operation. Now he began to advocate the use of parallel blockchain, referred to as the side chain. This function can open up a "cubicle" for the bitcoin ecosystem. First, it needs to freeze the bitcoin on the main block chain so that it cannot be paid out. Then, based on certain principles, it transfers their value to another small blockchain parallel to the main chain, and defines that the process is reversible. With the introction of the concept of side chain, developers are free to build a variety of trading platforms. Hope to adopt