Building blockchain

1. In many cases of blockchain commercial application, we can always see the word baas. Baas is the abbreviation of blockchain as a service, which is translated into "blockchain as a service" in Chinese. So what is blockchain as a service baas? With this question, we will follow Xiao Wang of Renren blockchain technology team to discuss it carefully
according to Xiao Wang, the concept of blockchain as a service (baas) is mainly proposed by Microsoft and IBM. To put it bluntly, it is actually a new type of cloud service, a cloud service combined with blockchain technology. For example, Microsoft's azure cloud computing platform and IBM's bluemix garage cloud platform all provide blockchain as a service baas
blockchain as a service (baas) is a space created by enterprises such as Microsoft and IBM from their own cloud service network to run a blockchain node. Compared with ordinary nodes and exchange nodes, the main purpose of baas nodes is to quickly establish the development environment they need, and provide a series of operation services based on blockchain, such as search query, transaction submission, data analysis, etc. these services can be centralized or decentralized to help developers verify their concepts and models faster. The service of baas node is reflected in: it is more instrumental and easy to create, deploy, run and monitor blockchain.

2.

From the perspective of technology and architecture, I will tell you my understanding of blockchain in common language

what is blockchain? In a word, blockchain is a storage system. To be more specific, blockchain is a distributed storage system without an administrator and each node has all the data

What are the common storage systems like

first, how to ensure high availability

the common storage system usually uses "rendancy" to solve the problem of high availability. As shown in the figure above, if the data can be copied into several copies and rendant to multiple places, high availability can be guaranteed. The data in one place is hung, and there is data in other places. For example, the master-slave cluster of MySQL is the same principle, and the raid of disk is also the same principle

two points need to be emphasized in this place are: data rendancy often leads to consistency problems

1. For example, in the master-slave cluster of MySQL, there is actually a delay in reading and writing, which means there is a inconsistency in reading and writing in a short period of time. This is a side effect of data rendancy

The second point is that data rendancy often reces the efficiency of writing, because data synchronization also consumes resources. If you add two slave libraries, the write efficiency will be affected. The common storage system is to use rendancy to ensure the high availability of data

so the second question, ordinary storage system, can write more

the answer is yes, for example, take this graph as an example:

in fact, MySQL can do a master-slave synchronization of al masters, master-slave synchronization of al masters, two nodes can be written at the same time. If you want to do a multi room multi live data center, in fact, multi room multi live data synchronization. What we should emphasize here is that multi-point writing often leads to the consistency problem of writing conflicts. Take MySQL as an example, suppose that the attribute of a table is self incrementing ID, then the data in the database is 1234 now. If one of the nodes writes and inserts a piece of data, it may become 5, and then these 5 pieces of data are synchronized to another master node, Before synchronization, if another write node inserts a piece of data, a piece of data with self incrementing ID of 5 will be generated. Then, after the generation, synchronize to another node, and the synchronized data will conflict with the two local 5's after it arrives, which will lead to synchronization failure and write consistency conflict. This problem will occur in the case of multi-point writing

how to ensure consistency in multi-point writing

the reform "Swan class" gives you more technical work

3.

When it comes to offshore companies, they usually choose to register in the islands. Some domestic giants, such as Ali, tengxu, Shanda network, Xiaomi and Haidilao, set up overseas IPO structures by registering offshore companies in the islands

advantages of offshore companies registered in the islands:

1. Full tax exemption system (only a small amount of annual management fee)

2. Company information confidentiality (high degree of confidentiality)

3. Overseas IPO structure (Tencent, Xiaomi and other domestic giants build overseas IPO structure by registering offshore companies)

4. Freedom of name (Chinese can be added)

5 No foreign exchange control

6, no specific business scope, as long as not engaged in illegal and criminal activities or need to franchise instry

Second, the non-profit foundation of Singapore can issue relevant legal opinions to prove that the operation of the company is in line with the current laws of Singapore

The main contents of the legal opinions are as follows:

1. White paper modification: the white paper of the project shall be modified where it does not comply with the laws and regulations of Singapore, and a professional legal compliance opinion shall be issued by a lawyer

2. Token non securitization certificate: the lawyer issued a professional legal opinion to clarify in detail that the token issued by the project does not have the nature of securities

4. The first part: build your own blockchain directory from 0 to 1:
1.1 start with imitation, First knowledge of blockchain
1.2 basis of blockchain: analysis of consensus mechanism
1.3 design principle and method of consensus mechanism
1.4 how to quickly clone a blockchain
1.5 how to turn bitcoin into its own private chain - bifurcated bitcoin
1.6 how to turn Ethereum into its own private chain - bifurcated Ethereum
1.7 how to turn ripple into its own private chain - bifurcated Ripple
1.8 how to turn stellar into a private chain of its own, How to develop your own blockchain wallet (windows and MAC) 1.11 how to develop your own blockchain wallet (Android and IOS) 1.12 how to develop an online wallet similar to blockchain.info 1.13 how to increase the security and robustness of your own blockchain network 1.14 how to use coin to handle recharge withdrawal business
1.15 How to use the fund pool to build a mixed currency service
1.16 how to design a new mining algorithm
this process is generally used, but it is also very difficult for ordinary people to complete. The mature projects of blockchain include Ethereum, decent, bitcoin and so on.

5.

Hello, thank you

How can enterprises establish their own blockchain

with the popularity of various currency transactions, the development of the exchange instry has been promoted. As Xiao, who wants to cross instry, how to establish a blockchain exchange development company? Chain soft network summarizes the following points for you

3. Working with banks or payment processors

you need to work with banks or payment providers to process payments in legal tender. You can choose a trustworthy bank with lots of online facilities

4. Create liquidity in your exchange

any exchange needs liquidity to operate successfully. Customers are hesitant to place orders or even deposit money unless they see the full order and transaction activity. New transactions will naturally encounter liquidity problems

5. Ensure high-level security of trading and customer data

any exchange development company needs first-class security to ensure that the funds of exchange operators and traders are safe. This should also apply to your customers' private data, including their KYC details and bank account information. Over the years, the unnoticed GOx vulnerability resulted in the theft of nearly 1% of the total number of bitcoins in circulation at that time. According to chain soft network, between 2009 and 2019, one third of all bitcoin exchanges were hacked. Therefore, security must be the first priority in your transaction

Finally, customer support is another important part of a successful exchange. Staff are required to approve KYC requests, answer customer complaints, process deposits and withdraw legal tender, etc. A fast customer support mechanism ensures that your customers start trading from the date of signing and generate revenue for your exchange

I hope it can help you to solve the related problems. For more details, please feel free to consult and discuss< br />

6. Blockchain service refers to the development of public chain applications according to the infrastructure provided by the public chain, and the operation of applications to provide services. For example, using smart contract to develop public chain applications on Ethereum, and running on Ethereum nodes to provide effective services to the public. On bitcoin, we can provide some deposit services with the limited functions of bitcoin
blockchain developers should establish effective channels to collect the deficiencies of the current blockchain and make targeted improvements. This process is called improvement proposals: bitcoin isolation witness (composed of a series of BIPS) is a good example. Application layer developers can use IP process to feed back the problems found in the use process to developers, forming a virtuous circle. And IP process should not be limited to the technical field, but should go deep into the business layer
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system.

7. There are many things that can be done, such as digital IP, public welfare, finance, supply chain, logistics and so on

8. Xu Mingxing firmly believes that blockchain will become the infrastructure of future life, so he has opened the whole instrial chain layout of blockchain, and is committed to the research and development and application of underlying technology of blockchain. On the basis of launching browser, he has successively launched application services such as data analysis on the chain, wallet on the chain, blockchain asset custody and usdk stable currency.

9. Blockchain refers to a distributed and shareable public account book that can be trusted through consensus mechanism and checked by each participant. However, no centralized single user can control it. It can only be revised according to strict rules and open protocols<

features:
1. Decentralization
in current system design or application development, central server is considered to realize all information exchange and data storage. But in the blockchain, through the construction of distributed architecture and open source protocol, all participants participate in data recording and verification, and then send them to each node through distributed propagation. Even if some nodes are attacked or damaged, the integrity and information update of the whole database will not be affected, which means that each participating node is "self-centered"

2, to trust
in traditional Internet mode, it is through the trusted central node (such as the housing registration system) or the third party channel (such as Alipay) to carry out the matching verification and trust accumulation, so it can not achieve the center of value transfer.

3. Timestamp
blocks are generated by packaging all the information (including data and code) generated in a certain period of time. The index information of the previous block is included in the page capital of each next block, and the chain is formed by end-to-end connection. Therefore, the addition of block (Complete History) and chain (complete verification) forms a time stamp (which can trace the complete history). It stores all the historical data in the system, provides retrieval and search functions for each data, and can trace the origin and verify each data by means of blockchain structure<

4. Asymmetric encryption
blockchain is an asymmetric encryption algorithm through the mathematical consensus mechanism, that is, a "key pair" is used in the process of encryption and decryption, and the two keys in the "key pair" have the characteristics of asymmetry: first, only the other key can be decrypted after one key is encrypted; Second, after one of the keys is public, other people can't work out another key according to the public key.