Blockchain system function test certificate 6

1. Different companies have different prices. As for the blockchain system, Shengshi Huacai company has specialized research, with good service, good technology and high cost performance. You can consult Shengshi Huacai company in Shenzhen.

2. I don't think it's expensive to build a blockchain system. Last time I cooperated with Shengshi Huacai company, their company's fees are reasonable and they are very conscientious in the blockchain system instry.

3. There are six hierarchical structures in the blockchain, which are from bottom to top: data layer, network layer, consensus layer, incentive layer, contract layer and application layer
1. Data layer
the data layer is the lowest layer in the six hierarchies of the blockchain. We can understand the data layer as a database, but for the blockchain, this database is a tamperable and distributed database, which is what we call "distributed ledger"
in the data layer, that is, the "distributed ledger", the data information on the blockchain is stored, and the blockchain structure, asymmetric encryption technology, hash algorithm and other technical means of the block are encapsulated to ensure the security of the data in the case of the whole network being open. The specific method is:
in the blockchain network, nodes use consensus algorithm to maintain the consistency of data layer (that is, the distributed database), and use asymmetric encryption and hash algorithm in cryptography to ensure the non usurpation and traceability of the distributed database
This constitutes the bottom data structure of blockchain technology. However, it is not enough to have a distributed database. We also need to let the data information in the database be shared and exchanged. Next, we will introce the upper layer of the data layer - the network layer
Second, network layer
the network system of blockchain is essentially a P2P (point-to-point) network. Point to point means that there is no need for an intermediate link or centralized server to control the system. All resources and services in the network are distributed in the hands of each node, and the transmission of information is also a direct communication between the two nodes. However, it should be noted that P2P
(peer-to-peer) was not invented by Nakamoto, and the blockchain only integrates this technology
therefore, the network layer of blockchain is actually a particularly powerful point-to-point network system. In this system, each node can not only proce information, but also receive information, just like sending e-mail. You can write your own e-mail, and you can also receive the e-mail sent to you by others
in the blockchain network, nodes need to jointly maintain the blockchain system. Every time a node creates a new block, it needs to notify other nodes in the form of broadcast. After receiving the information, other nodes verify the block, and then create a new block on the basis of the block. In this way, the whole network can jointly maintain and update the general ledger of the blockchain system
however, what rules should the whole network follow to maintain and update the general ledger of the blockchain system? This involves the so-called "laws and regulations" (rules), which we will introce next: the consensus layer
Third, consensus layer
in the world of blockchain, consensus simply means that the whole network should maintain and update the general ledger of blockchain system according to a unified and agreed rule, which is similar to the rule of updating data. It is one of the core technologies of blockchain and the governance mechanism of blockchain community to let highly dispersed nodes reach consensus efficiently in the decentralized blockchain network
at present, the mainstream consensus mechanism algorithms include: proof of work of bitcoin (POW), proof of rights and interests of Ethereum (POS), proof of rights and interests of EOS (dpos), etc
we now introce the data layer, network layer and consensus layer. These three layers ensure that there are data, networks and rules for updating data on the network. However, there is no free lunch in the world. How can nodes actively participate in the maintenance of the blockchain system? Here is the incentive layer, which we will introce next: incentive layer< 4. Incentive layer
incentive layer is the so-called mining mechanism, which can be understood as incentive mechanism: you can get as much reward as you contribute to the blockchain system. With this incentive mechanism, the whole network nodes can be encouraged to participate in the data recording and maintenance on the blockchain
mining mechanism and consensus mechanism are actually the same truth. Consensus mechanism can be understood as the company's general rules and regulations, while mining mechanism can be understood as the reward rules for what you do well in the general rules and regulations
just like the consensus mechanism POW of bitcoin, it stipulates that more work pays more. Whoever can find the correct hash value first can get a certain amount of bitcoin reward
and Ethereum's POS stipulates that the older the holder is, the more likely he or she will be rewarded
it should be noted that the incentive layer is generally only available for the public chain, because the public chain must rely on the nodes of the whole network to jointly maintain data, so there must be a set of incentive mechanism to encourage the nodes of the whole network to participate in the construction and maintenance of the blockchain system, so as to ensure the security and reliability of the blockchain system
the blockchain is safe and reliable, and it is not intelligent enough, right? The contract layer we will introce next can make the blockchain system more intelligent
v. contract layer
Contract layer mainly includes various scripts, codes, algorithm mechanisms and smart contracts, which is the basis of block chain programming. What we call "smart contract" is at the contract level
if the bitcoin system is not intelligent enough, the "smart contract" proposed by Ethereum can meet many application scenarios. The principle of the contract layer is to embed the code into the blockchain system, in this way to realize the smart contract that can be customized. In this way, on the blockchain system, once the terms of the smart contract are triggered, the system can automatically execute commands< Finally, the application layer. The application layer is very simple. As the name suggests, it is a variety of application scenarios and cases of blockchain. What we now call "blockchain +" is the so-called application layer. At present, the blockchain applications that have been implemented are mainly various blockchain applications built on
eth, EOS and other public chains. There are more applications of gambling and games, and the real practical applications have not yet appeared.

4. There is a "chain College" in Beijing. There are weekend classes in technology and regular online and offline courses.

5. At present, there are many blockchain development companies, such as Shengshi Huacai, which provide underlying technical services, and provide investment, mining, information and user-defined functions in combination with commercial systems. It's better to choose according to your own actual situation

6. I took the examination after I signed up for the study at the Hashimoto business school. They are junior, intermediate and advanced. Different levels of learning have different content and depth. Elementary is the basic knowledge of the introction of popular science, very simple.

7. Think with your pig brain, is this discount platform the father of game developer? Why did the game authorities give him such a low price? 6% off. Then who will go to the government to charge money? Do you think if you sell things in business, will you ask others to collect money for you? And if you sell something for ten yuan, he will give you five yuan to sell it and then give you four yuan. You understand that? What are you thinking. How can we get a 4.6% discount? It's simple. 1. The server of the game should be maintained by your platform. You pay for electricity, water, rent and employees' salaries. Pay for new activities, new roles, new maps and new plots. Responsible for the cost of game promotion, you come out, you find people to promote. Then I'll give you a 4.6% discount. Got it? And these discount platforms recharge virtual currency on their platform and then transfer to the game. Think about this routine. Take Netease, a big game manufacturer, for example, how dare he give a discount of 4.6 for so many games he represents? The game developer didn't beat him to death. If you really want to play the game discount, you can only go to the official website to recharge. Other people's game developers can't have made 10 yuan, let you go to other places to charge 10 yuan and then give him 4 yuan. The server group is with the developer. What data does your account login have that people can see. Is it difficult for the discount platform to make up 6 yuan for the 4 yuan you charged to the official? There is also a discount platform to buy the game. As I said above, the game developers develop the game, then sell the right to the game platform, and then they are responsible for maintenance. Then the game platform advertisement said, alas, this game is only 40% off. But the game is his. The original price is 4 yuan. I'll tell you 10 yuan. Now the discount is only 4 yuan. Do you understand this routine? And then you feel like you're making money. But when you enter the game, you will find that it's all V's and there are too many explosions. Then such a game opens once a few days. And then in the integration let you compare money. Even if it's 10% off, it's more expensive than playing games. Then you will find that those who don't have enough money will not play. Game platform to continue to open a few times, and then cut a few waves of leeks. Squeeze you dry, not many people in the game finished, she shut down, because the server is open, every day is to ask for money. But at this time, he has an excuse. He will say that the game was not developed by him, ha ha ha. He's just a discount platform. What do you do;

9. I took the exam, but I took the exam after I signed up to study at the hashton business school. They are junior, intermediate and advanced. Different levels of learning have different content and depth. Elementary is the basic knowledge of the introction of popular science, very simple, pass the exam also issued a certificate.

10. Blockchain is a "decentralized" ledger that everyone maintains together. This ledger is a logical concept. Each node maintains its own ledger data independently. The so-called public ledger means that the data of each ledger should be consistent, and the part that keeps consistent is the public ledger. I recommend Shengshi Huacai to you. It is a professional financial IT solution and technical service provider. It has done relatively well in blockchain.