Connecting blockchain node

1. Nodes are the places where the blocks are connected, and the blocks need to be chained to be useful
core analysis:
1. Transparency, 2. Openness, 3. Information can not be tampered with, 4. Decentralization,
5. Detailed analysis
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system
1. In a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it can not be tampered with and forged by cryptography
2. Broadly speaking, blockchain technology uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, and uses cryptography to ensure the security of data transmission and access It is a new distributed infrastructure and computing method to program and operate data by using intelligent contract composed of automated script code.

2. bitcoin blockchain is a bitcoin blockchain? No, the block stores the transaction. In the early stage, you will get a coin if you successfully build a block. In the later stage, you can only get the fees paid by the exchange. A currency is a string of digital signatures. It is a digital signature sent by the last owner to the receiver. Everyone can see who owns the currency from the transaction
does each node have complete blockchain data? You mean a user node? A user node needs to keep the of the block head of the longest workload proof chain, so it knows the data of all the block heads. It can move forward to know all the data on the block chain, but not all of them are saved. A block header is very small, only 80 bytes, which can be saved completely, because the generation of nodes is very slow. Even with the passage of time, the amount is not too large now.

3. A lot of network, or in a group said easy to understand. Teach you to understand with mathematical knowledge (node is a point, block is a line, and blockchain is a surface). Node is the basic unit of information processing in blockchain application technology. After processing information, many nodes will be timestamped, generate data blocks, and connect blocks in time sequence to form blockchain.

4. It contains complete blockchain and network routing nodes, which are only used to synchronize blocks, participate in verification, and maintain connection with peer nodes.

5. Blockchain is composed of a series of block links generated by cryptographic algorithm, so it is called blockchain
each block is filled with transaction records, and the blocks are connected in sequence to form a chain structure, which is the blockchain ledger
blockchain technology divides the data to be stored in the database into different blocks. Taking bitcoin as an example, when miners generate new blocks, they need to calculate the new hash value and random number according to the hash value of the previous block, the new transaction block and the random number. Each block is linked to the back of the previous block through specific information, and connected in chronological order to present a complete set of data. In other words, each block is generated on the basis of the previous block data, which ensures the uniqueness of the blockchain data
each blockchain database is essentially an event chain connected in chronological order, which uses the cryptographic mechanism specified in the protocol for authentication to ensure that it will not be tampered with or forged. With the popularity of blockchain and bitcoin, many related top domain names have been registered, which has a great impact on the domain name instry
blockchain technology has three obvious characteristics: openness, security and uniqueness
openness mainly refers to that the stored information in the blockchain is completely open to all participants. This is mainly determined by the point-to-point network storage mode of the blockchain. In the blockchain network, each node can store a of the blockchain, and the uniqueness of the blockchain can ensure that the is exactly the same between different nodes
security mainly refers to that the information stored in the blockchain block is saved after being processed by digital encryption technology, and only the private key holder can decrypt the information to obtain the real information. Other members can only see and verify the integrity and uniqueness of information, but cannot see the real information
uniqueness is mainly e to the fact that the information on the blockchain cannot be tampered with once it is on the chain, so it is unique. Of course, the uniqueness here also includes the uniqueness in space, that is, all nodes have only one version of information, and also includes the uniqueness in time, that is, the historical data cannot be changed. This uniqueness also means that the blockchain maintains the characteristics of a unique main chain in the process of operation, and once other chains appear, it is a bifurcation. The emergence of bifurcation will lead to the plication of blockchain in two different spatial dimensions. Of course, to solve this problem, we need to set reasonable consensus rules to avoid
there is no distinction between mobile and non mobile end in blockchain, and if there is one, it is also a gimmick.

6. In recent years, more and more people travel abroad. A good credit card can add a lot to your journey. Everbright Bank is in love with the rhythm of tourism, and has launched a variety of tourism rights cards. Take this Everbright Caesar tourism platinum card as an example. There are many preferential rights and interests. The card and the first brush gift are very generous. Is it really that amazing? Follow Xiaobian to find out
Everbright Caesar travel white card gift
time: before June 30, 2018
Object: Everbright Caesar joint platinum MasterCard customers
ring the activity, customers who activate their credit cards and brush Everbright Caesar joint platinum MasterCard for the first time can enjoy 16 days of free overseas WiFi rights
you need to send self recording videos overseas, so you don't have to worry about non flow money anymore! It should be noted that each customer can only enjoy the right once a month, and only the top 300 customers can enjoy the right once a month
Everbright Caesar travel white card gift
event time: before June 30, 2018
event object: Everbright Caesar joint platinum card MasterCard customer
as long as Everbright Caesar joint platinum card MasterCard customer, ring the event period, the first brush and single currency transaction over $500 or more, you can get the value of 500 yuan of Jingdong e card rights
at the end of the next month after card consumption, the equity password of JD e card will be sent to your mobile phone in the form of SMS, regardless of name, no loss reporting, no cash exchange, and need to be kept properly
here is an introction to the opening ceremony and the first brush ceremony of Everbright Kaiser travel white. Of course, there are a lot of exclusive activities and services, such as Jingdong Mall's card consumption of 300 minus 100, the one-way airport shuttle service of 2 times / year, etc
recently, China Everbright Bank and Caesar tourism released their first joint brand card "Everbright Bank Caesar tourism platinum joint brand credit card" in Beijing. It is reported that the card is the highest level tourism exclusive card launched by both sides and is expected to cover millions of middle-class people in China
the Everbright Bank Kaiser Travel Co branded card launched this time is a platinum grade credit card, which is divided into UnionPay card and MasterCard. The design elements are mainly Aurora, and the design concept comes from "the world shines for me" - boundless dream. As long as you dare to pursue and set out, the world will shine for you
in addition to the basic rights and interests of Everbright, UnionPay and MasterCard platinum cards, the co branded card can also enjoy more exclusive rights and interests. For example, if a new user activates free international WiFi for 16 days, he or she can get the first swipe gift (if he or she swipes the card for more than $500, he or she will get the benefit of Jingdong e-card of $500). He or she can also enjoy airport shuttle, airport VIP hall, air delay insurance, travel accident insurance, road rescue, etc
What's more attractive is that cardholders can enjoy 5 times of points by consuming the whole line of Caesar procts, and they can grab 300 yuan of Caesar travel limited exclusive travel voucher by 1 yuan; Designated overseas cooperative merchants can enjoy 88% discount for consumption by card and customized tourism procts; You can also enter the aurora card zone of Caesar's official website and app as a privilege to purchase the specified preferential routes covering 100 countries and regions around the world, and over 10000 kinds of wonderful tourism procts will be put into the aurora card zone
Liu Yuxiao, general manager of Credit Card Center of China Everbright Bank, said: "this cooperation has effectively integrated the high-quality resources of both sides, and will provide cardholders with better daily travel services and the most convenient payment experience. This is an important step taken by Everbright credit card and Kaiser tourism in improving the quality and efficiency of serving the real economy, supporting the development of Inclusive Finance, and boosting the expansion of domestic demand. ".

7. It depends on whether you invest. If you don't invest, you can make money by checking in every day. If you invest in the miner, the income will be higher.