区块链 报价,区块链2.0实战

A. What is the landmark project for blockchain development to enter the 2.0 era?

The landmark project for blockchain development to enter the 2.0 era is Ethereum.
The biggest difference between Blockchain 2.0 and Blockchain 1.0 is that smart contracts are added to the digital currency, and other application development can be done on this basis. Blockchain 2, 0 represents Ethereum. In blockchain 2 and 0, Ethereum is equivalent to a basic chain and a bottom-level construction.
Ethereum’s plan is to build a global, large-scale collaboration network so that anyone can perform calculations and develop application layers on Ethereum. This gives the blockchain many application scenarios and functions. Base.

B. What are the characteristics of blockchain?

Characteristics of blockchain: 1. Security: not attacked by any person or entity; 2. No information can be tampered with; 3. Traceable , all nodes in the network are accessible; 4. Decentralized, no third party. Regarding blockchain news, you can learn about it at Crypto Finance.

C. What is blockchain and how to understand blockchain applications

Blockchain is a new type of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. Application mode. The so-called consensus mechanism is a mathematical algorithm that establishes trust and obtains rights and interests between different nodes in the blockchain system.
Blockchain is an important concept of Bitcoin. It is essentially a decentralized database and serves as the underlying technology of Bitcoin. The blockchain is a series of data blocks generated using cryptographic methods. Each data block contains information about a Bitcoin network transaction and is used to verify the validity of its information (anti-counterfeiting) and generate the next block.
Let’s talk about the social or economic significance of blockchain. Many technologies in the past were actually dedicated to "productivity", such as artificial intelligence, which is an advancement in productivity. The blockchain has greatly improved production relations and is dedicated to production relations. So why do you say that?
Because the so-called production relations are actually how business is done between people and business partners. And these things are originally in the process of people's mutual cognition, and no special procedures are used to program or quantify them.
For example, if you and I are good friends now, we can do business. If someone provokes our relationship and we are no longer good friends, we will not do business. Even if we can make money by doing business, we will not do it. , because everyone no longer has any trust in each other.
As for the blockchain, it is actually because the data has been certified by various nodes and backed up at the same time, so my data is as authentic as possible and cannot be tampered with. So in this case, you believe my data, On this basis, you can create a program, and then program the "production relations" of what kind of business contracts and business cooperation this data can be used for. In this way everyoneJust believe in the data and the program compiled by the algorithm. And because you believe in the data and the program, you can develop various APPs based on this program. These APPs are the relationship of production and what kind of business you are going to do. This is: Blockchain is actually a reconstruction of "production relations".

D. What does blockchain mean?

Blockchain is a term in the field of information technology.

Essentially, it is a shared database. The data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". . Based on these characteristics, blockchain technology has laid a solid foundation of "trust" and created a reliable "cooperation" mechanism, which has broad application prospects.

Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm.

The Origin of Blockchain

Blockchain originated from Bitcoin. On November 1, 2008, a person claiming to be Satoshi Nakamoto ) published the article "Bitcoin: A Peer-to-Peer Electronic Cash System", which elaborated on the architectural concept of an electronic cash system based on P2P network technology, encryption technology, timestamp technology, blockchain technology, etc., which marked the The birth of coin.

Two months later, the theory came into practice, and on January 3, 2009, the first genesis block with serial number 0 was born. A few days later, block number 1 appeared on January 9, 2009, and was connected to the genesis block number 0 to form a chain, marking the birth of the blockchain.

E. How to understand blockchain

Nowadays, science and technology are developing rapidly and the situation is turbulent. If you and I are a little lazy, we may be out. No, the new "hot internet celebrity" - blockchain is here. Since the beginning of this year, blockchain has become one of the hottest knowledge points in the technology world, and it has become increasingly dazzling in fields such as digital finance, Internet governance, and big data computing.

Blockchain technology also has broad application prospects in the military field and is very likely to quietly subvert future wars.

This is not Xiaole bragging. "In matters involving the three armed forces, nothing should be more important than secrecy." We must know that in the future information battlefield, confidentiality is the key to determining the outcome of a war. Because the blockchain system has many characteristics such as information independence, confidentiality and integrity, it can achieve the perfect combination of data storage and data encryption. After being attacked, it is also extremely resilient and can protect highly sensitive data, which is very helpful in winning the war.

According to the information collected by Xiaole, some countries are currently planning to build a blockchain information platform and have begun to study the application potential of blockchain in several scenarios such as military satellites and nuclear weapons; a certain International organizations are currently evaluating the performance of blockchain technology in military logistics, the Internet of Things and other fields.

If digital currencies such as Bitcoin are blockchain 1.0 applicationsYes, the "smart contract" that provides a strong guarantee for the security of network transaction data is blockchain 2.0. There will be 3.0 in the future - from DAO (blockchain self-consistent organization), DAC (blockchain self-consistent company) to the blockchain society.

“Use informatization to cultivate new kinetic energy, use new kinetic energy to promote new development, and use new development to create new brilliance.” I believe that blockchain, the “new kinetic energy” of technology, will bring us more surprises: “ "With a machine in hand, I own the world", "trade autonomy", wider sharing, optimally adapted life model... Blockchain technology will create a more honest, convenient and efficient big data era.

Content source: People's Liberation Army Daily

F. How does blockchain technology make money? Please answer.

There are four ways to make money with blockchain technology:

1. Hardware and infrastructure, typically mining machine production and distribution chains, where you can buy mines Make money by using machines and mining to earn coins.

2. Blockchain underlying platforms and general technologies, such as public chains such as Ethereum, privacy protocol Nucypher, etc., where you can make money by investing in its tokens, building on-chain applications, and providing services to users. .

3. Various vertical applications, such as blockchain-based supply chain traceability and finance, copyright confirmation and transactions, etc. You can use these applications or invest in their tokens to make money.

4. Service facilities, such as digital asset exchanges and wallets, media products, etc. You can make money by setting up an exchange yourself.

(6) Blockchain 20% off extended reading:

Types of Blockchains

1. Public Blockchains

Public Block Chains means: any individual or group in the world can send Transactions can be effectively confirmed by the blockchain, and anyone can participate in its consensus process.

Public blockchain is the earliest blockchain and the most widely used blockchain. The virtual digital currencies of all major bitcoins series are based on public blockchains. There is only one such blockchain in the world. The blockchain corresponding to the currency.

2. Consortium (Industry) Blockchains

Industry Blockchains (Consortium Block Chains): Multiple pre-selected nodes are designated within a certain group as bookkeepers. The generation of a block is jointly decided by all pre-selected nodes (pre-selected nodes participate in the consensus process), and other access nodes can participate in transactions.

3. Private Blockchains

Private Blockchains: Only use the general ledger technology of the blockchain for accounting. It can be a company or a company. Individuals have exclusive write permission to this blockchain. This chain is not much different from other distributed storage solutions.

G.What is blockchain and how to make money with blockchain

Blockchain is a term in the field of information technology. In essence, it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". Based on these characteristics, blockchain technology has laid a solid foundation of "trust" and created a reliable "cooperation" mechanism, which has broad application prospects.
The ways to make money in the blockchain are as follows:
1. Coin speculation. Coin speculation is like stock speculation. Coin speculation is the lowest threshold for making money in the blockchain;
2. Vendors, district Blockchain is a global market. Like small traders, you can move from a low-price platform to a high-price platform to sell and earn the difference;
3. Earn commissions for promotion. The blockchain method is to register first Exchange account, generate your own invitation link, and then promote it. If someone registers the exchange through your link and generates transactions, you can get a commission;
4. Mining, "mining" in Bitcoin is The accounting process;
5. Technical support, providing blockchain technical support to some teams and enterprises;
6. Opening a trading website and charging handling fees;
7. Developing wallets and wallets It is the infrastructure of the blockchain, just like the "Alipay" or "WeChat Pay" of the blockchain;
8. Be a blockchain project or infrastructure equipment supplier.

Warm reminder: The above explanation is for reference only and does not make any suggestions. There are risks in entering the market, so investment needs to be cautious. Before making any investment, you should ensure that you fully understand the investment nature of the product and the risks involved. After understanding and carefully evaluating the product, you can make your own judgment on whether to participate in the transaction.
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H. [Blockchain] What is Blockchain (2)

Because the current blockchain field is filled with a large number of funds and air coins. Moreover, when talking about blockchain, it inevitably involves topics such as finance, investment or speculation. Investment is risky and decisions need to be made with caution. Friends, please keep your eyes open and proceed at your own risk.

In this famous paper, Satoshi Nakamoto succinctly discussed how to implement a complete peer-to-peer electronic currency system that does not require a financial institution.

However, he did not explain clearly why he needed to do this. But when I think of the famous quote that he forever minted in the first Bitcoin block: "The Times 03/Jan/2009 Chancellor on brink of second lout for banks. "The chancellor is on the verge of a second bailout for banks", we can't help but follow the clues and ponder:

In fact, human modern financial institutions, or in other words - —The history of banks is not that long. The word Bank in English originated from the Italian BanCa, which originally meant a bench used for transactions. The prototype of modern banking originated in Venice, Italy in the 13th century. Of course, in almost the same era, in the far East, in the Song Dynasty of China, banks and banks with usury and interest-free deposit businesses also appeared.

Originally, it was an almost natural process for gold and silver to become the world's recognized currency. I still remember Marx once said:

However, since the emergence of banks, bankers were delighted to find that the banknote they wrote was almost equivalent to gold and silver, and also played the role of currency. effect. Therefore, relying on people's trust in banks as financial institutions, bankers can conjure money out of thin air. As long as everyone does not come to exchange the silver notes into silver at the same time, the bank that has deposited 100,000 taels of silver can issue 110,000 taels of silver notes, 100,000 to the depositor, and 10,000 to spend by yourself! even more! ! !

We can abstract the development process of this story:

Although, later the coinage power was taken back from private banks to the central banks of various governments. But what do central banks do? Not to mention the stupid behavior of the stupid Kuomintang government that crazily issued legal currency and destroyed the economy (100 legal currency could buy two cows in 1937, one fish in 1945, and two grains of rice in 1948. Of course, it was completely abolished in 1949. ), let’s take a look at what the United States, which is the leader in the world economy, does today:

So, in 1933, one ounce of gold was worth $20; in 1944, one ounce of gold was anchored at $35, until August 15, 1971; in 1973, one ounce of gold exceeded $100; in 1975, one ounce of gold was about $150; in 2021, one ounce of gold has exceeded $1,800! From 1933 to 1944, the American people were forced to pay nearly double the price for 10 years, which finally made the U.S. dollar the world currency; and then from 1971 to today, 50 times, 50 years!

Now everyone knows where Wang Er Mazi’s rice and vegetables come from. But, so what? After all, the world cannot do without financial institutions, and it also cannot do without the largest and most awesome company. It is not too outrageous to make do with Wang Ermazi to take care of it. How about letting him eat the rice and vegetables?

But cryptographer and programmer Mr. Satoshi Nakamoto obviously has different opinions. He published "Bitcoin: A Peer-to-Peer Electronic Currency System"Electronic Cash System" When registering the P2P Foundation website for this paper, the birthday filled in was April 5, 1975. Now many people speculate that writing this date must have some ulterior meaning!

So, in short, we need to remember that Satoshi Nakamoto’s purpose of inventing Bitcoin was to realize a complete peer-to-peer electronic currency system that does not require a financial institution.

And this is the driving force behind the birth of the entire blockchain world that is now turbulent.

No one of us can accurately explore what Mr. Satoshi Nakamoto was thinking at that time. But this "sociological financial experiment" started by him is still in full swing after more than 10 years...

I. Introduction to Blockchain

Wikipedia describes the blockchain as follows:

A blockchain, originally block chain, is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block typically contains a cryptographic hash of the previous block, a timestamp and transaction data. By design, a blockchain is inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks.Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.

Simply organized, the blockchain system includes the following elements:

Data: The data stored in the blockchain can be transaction records or smart contracts and other information;

Block: used to save data; blocks have A block header, which contains the hash value of this block, the hash value and timestamp of the previous block header, block ID and other information;

Chain: Blocks form a linked list, first A block is called a genesis block, and subsequent blocks are added to the chain as mentioned above, and can only be added but not deleted or modified;

Distributed: It is a distributed system, different from other The difference with distributed systems is that each node in the system will save complete data (some practices may be different, but at least a majority of nodes)

Safe: data will not be tampered with, each Each block records the hash value of its previous block. If the content of the block is changed, the hash value will change, which means that all blocks after the block must be modified; furthermore, all nodes store complete linked lists. , if it is possible to change a single node, then it is basically difficult to change all (most) nodes. It is said that it is easy to break one chopstick, but difficult to break a hundred chopsticks.

Transparent: Other nodes will perceive the operation of any node, and the data stored on the chain will be verified, which further provides security and mutual trust.

Decentralization: There are no central nodes or key nodes, thus providing high reliability, but there are also distributed system consistency issues. Now different products use different consistency algorithms, such as Bit POW in the currency, Ethereum POW+POS, etc.

From the technical characteristics of the blockchain, we can see that it is suitable for some scenarios that require cross-organizations/individuals.

WIP