Blockchain Xiaoming

1.

Well, I'm a blockchain operator

Yes, I am engaged in operation work in blockchain technology instry, covering community operation, user operation and content operation

is there any doubt that the blockchain technology is developing steadily, but the blockchain instry seems to be ups and downs? Blockchain operation is also exploring in constant changes. Me too

here is my confession

1.1. Not sad or happy, token is not all

operating in the blockchain instry, and the price is inevitable to talk about. Ups and downs are common, and ups and downs are daily. If you don't have a mind to see the strange, I'm afraid you can't bear such changes in the blockchain instry

2.2. Work or work, no change

what is operation? Compared with the early Internet instry, when most of the operations in the instry are still relatively shallow community operations, what we can do is to exceed the average level in the instry. Operation is still those operations, and because it is a blockchain instry, the nature of operation will change

3.3. Although it's exploration, there are also routines

in the process of operation in the blockchain instry, you will find that some operations still stay at the level of simple community operation or user operation, and even can't be called user operation, while some operations can be transformed from Zhonghua Li, upgrade and iterate their own operation routines, and have their own views on the development of the instry, We have explored our own methodology of blockchain operation

4.4. Professional level, top matching ability

what is professional? Ten points, twelve points. If the operation in the classical Internet era is traceable and the methodology of operation has a way to go, then the operation of the blockchain instry is based on the classical Internet operation. The changes in the blockchain instry are no less than those in the early years of the Internet, and even more than those in the early years of mobile Internet, o2o and other procts. What we need is not only the professional level of operation, but also the top allocation ability

5.5. To understand what you want to do

to enter the operation of the blockchain instry, most of you are interested in the infinite opportunities contained in this instry, or even directly cross-border from unrelated instries. No matter what your professional background is before you become a blockchain operator, I believe this instry will bring you what you want. But the question is, before you enter the instry, do you really want to understand what you want

6.6. Your core competitiveness and how to continue to advance

whether you operate in the classical Internet instry or in the blockchain instry, we must continue to explore, strengthen and continue to advance your core competitiveness. If you're good at it, dig deep. In the starting line and no big difference, the heart is the only key

the development of a new thing still needs to go through many detours, and the development of an emerging instry will also go through many key nodes

when eating crabs, you have to eat your own skills, don't you

2. I suggest you go to lieyun finance and economics
blockchain is actually two words, block and chain. Every bill is a block, which is linked together to form a blockchain.
first, at the beginning of bitcoin's operation, Xiaoming was given 200 yuan, and it was stipulated that whoever recorded the account first could get 10 yuan (this is the consensus mechanism, which encourages everyone to agree to do the same thing), Then give you a lot of blank bills, once a transaction occurs, you can fight for bookkeeping
1 one day, Xiao Ming gave Li Si 100 yuan (that's the deal). Then Xiao Ming could roar in the crowd and I gave Li Si 100 yuan (and sign his name). When you hear this, you can fight for bookkeeping.
2 because Wang Wu remembers quickly, he yells in the group when he finishes it first, and I remember well. This is Wang Wu, and he sends the bill to others. Wang Wu remembers very well, and there is no mistake after confirmation (Li Si signed his name), so Wang Wu gets a reward of 10 yuan, Then everyone put the bill on the last page of their books& lt; There can be multiple transactions at a time & gt
3 Wang Wu likes the glory of the king. He always likes a hero, demacia, but it costs 25 yuan, but Wang Wu only costs 10 yuan, which is obviously not enough. Wang Wu starts to think that I can keep my own account. Anyway, I can't see anything from the account book. Soon, Wang Wu got another chance to keep accounts. Besides keeping good records of other accounts, Wang Wu added one. Wang Wu gave Tencent 25 and then announced it in the group
4 while Wang Wu was waiting for demacia, Li Si carefully looked at the bill and found that it was all his own signature, no problem. However, Li Si found that Wang Wu had only 10 yuan to pay for the bill, so he refused. Similarly, everyone refused
5 Wang Wu's plan failed at the cost of wasting a lot of energy without rewards
the above basically explains the process of regional chain,
is the above explanation clear? Do not understand the place, you go to ask, lieyun finance it

3. Tell you what blockchain is and what can it do

what is a blockchain? How does it work

bitcoin has become the trend of modern Internet, followed by blockchain. It is said that blockchain technology will lead to fundamental changes in Internet operation, enterprise operation and everything else

but what is blockchain? Most of us don't know much about blockchain. If you want to understand blockchain, you can read this article carefully

what is a blockchain? In the simplest terms, blockchain is a distributed ledger

to understand what this means, let's first look at its opposite: a centralized ledger. Because blockchain technology starts from finance, we will also use the bank as an example

the following is the process of our bank debit card transaction:

you can buy goods by swiping your card in the store

the merchant sends the bill to your bank to get the agreed amount

your bank will verify whether you are likely to authorize the purchase

banks remit money to businesses

finally, the bank records this information in its ledger

there are a lot of technologies involved here, but basically that's it. The last step is important - the bank keeps track of all transactions made by the customer. This ledger goes all the way back to the first transaction the bank made

the ledger is kept, maintained and supervised by the bank. You can read it in your online bank account, but you can't change it. The bank is in full control. If it decides to make a change, there's nothing you can do

it is crucial that if hackers can access the bank's ledger, it may lead to many problems. They can change the account balance to make it look like some transaction never happened, and so on

that's why distributed ledger is so cool

blockchain network visualization

if the bank operates on a distributed ledger, each member of the bank will have a of the ledger. Whenever any member of the bank makes a purchase, they will tell all other members of the bank

each member validates the transaction and adds it to the ledger (the added record is called a "block"). This has some important benefits because there are no centralized permissions to manipulate records. Hacker access to one ledger won't be a big problem because other ledgers can easily verify it

on the other hand, it requires a lot of work. In short, the second system is blockchain (at least in the financial scenario)

as mentioned above, blockchain is a decentralized transaction list. If I send Xiaoming two bitcoins, I will send a message to everyone in the network, saying "I am sending Xiaoming two bitcoins", and they will record the transaction<

bitcoin and blockchain

let's take bitcoin as an example to illustrate

bitcoin transaction

but the transaction must be verified. This is where blockchain technology has become a bit more complex. Each bitcoin wallet (which we will complete in one second) has a public and private key

you use your private key to send transaction requests to other members of the network and confirm that you have cryptocurrency in your account. If they do, they allow transactions to register on the ledger

the mechanism of public / private key system is very complex, but it comes down to that every transaction is verifiable and secure< However, the computing cost of the whole system is very high. Everyone who updates the ledger needs a lot of authority to validate transactions and modify the ledger. This is where mining comes in. People who verify and modify use their own computing resources, and each time they get a small transaction fee

and they're using a lot of electricity to do it

in this way, each transaction will be verified and added to the ledger, and the person who performs the verification and modification will be paid. This is a reasonable system

at the same time, it is also very safe. To change a single block, you have to change each subsequent block. After all this is done, validation will fail because other copies of the chain will show someone tampered with one

how to define blockchain is a difficult problem

although the mechanism behind blockchain technology is not always intuitive, it seems that it is not too difficult to explain what blockchain is. But what we're describing here is the traditional definition

we can use this special type of blockchain for a wide range of applications;, Such as cryptocurrency, sharing medical information, sending security messages and so on. But more blockchain like technologies are being developed for other uses

for example, companies may use internal blockchains to manage problem tracking in software. Each block in the chain may represent a problem, and users can publish updates to the network. But is this a blockchain? In this case, the ledger is not public, it is only visible within the company

some people will say that this is not a blockchain

other blockchain like technologies are not encrypted. Are they still blockchain? What if it's centrally managed but uses other blockchain features? What defines the lowest level of blockchain technology? There is no consensus on these issues

what is a blockchain wallet

we usually hear people talk about bitcoin wallets, Ethernet wallets and other cryptocurrency specific wallets. But wallet technology can be used in any system that uses blockchain

a wallet is the software or hardware that "saves" your cryptocurrency. But it doesn't really have anything, it's just a place to store public and private keys. This information allows you to access the currency shown in the public ledger

the wallet is the only record of the key. So if you lose it, you will no longer be able to access your cryptocurrency

in the future of blockchain, how will it change our lives

one important thing about blockchain is that it is a public resource and no one really owns it because everyone owns it

blockchain is more than science fiction. We don't need to understand the mechanism behind this technology, but you need to understand that it may completely change our lives in the next 20 years

that sounds bold, but remember, 20 years ago, we were browsing the Internet on Netscape, using the most advanced Motorola flip phone, and buying our first DVD player. At that time, if we imagined that the computer could be held in our hands, and that we could buy a car, pay for money and watch movies on it, it would be considered a fantasy

although the impact of blockchain may not be as obvious as the Internet or as tangible as mobile phones, blockchain will effectively solve many troubles in daily life. For example, intermediary entrapment, transaction delay and so on. In our present life, middlemen can be seen everywhere. We take it for granted that they are a part of our life. If one day, these intermediaries no longer exist, you will find that the world will become a different one

imagine that by 2040, blockchain may become a mature and widely used technology. One day, you can't do without blockchain, just as you can't do without the Internet now, you will be surprised that this decentralized accounting technology has become a part of your lifestyle<

first praise
+ 1

4. Blockchain was born in bitcoin of Nakamoto Tsung in 2009. In Chinese, it is translated as "blockchain" according to the respective meanings of block and chain.

5. See my answer here for the difference between hyperledger fabric and public chain. What is blockchain and how to introce it easily- Hyperledger fabric is the most mature one in the field of alliance chain (private chain). The whole structure of the new version (V1) is like this: first, there are some chain codes on the chain, which can be understood as smart contracts. In short, they are agreed logic. Then a transaction can point to and trigger these contracts, and get an output, which will also be written in the transaction. In addition, the change of the new version compared with the old version is that the nodes of the whole network are divided into two types (client I don't think is the node in the network, because it doesn't participate in consensus). One is called endorser, and the other is peer. In addition, there is a function mole called orderer. Some nodes can act as orderer. The main function of this mole is to sort and package transactions into blocks. The process of the transaction is as follows: 1. First of all, each chain code has a specified approving party. Suppose we consider a chain code for automobile transaction, which has three nodes: A, B and C. for example, the Chain Code stipulates the following logic: before the transaction takes effect, two of a, B and C approve the transaction. 2. At this time, suppose user Xiao Ming wants to buy a car, he generates a transaction request to trigger the chain code for the transaction, and he sends the request to nodes a, B and C for approval. 3. If the request is correct and reliable, nodes a, B and C approve the request. They will directly calculate and generate the result, and then write it as a transaction to feed back to the user (at this time, it is not written into the blockchain, or they call it the ledger). 4. After the user receives the returned transaction, if he confirms that the returned transaction results are consistent, he sends the transaction to the sorting mole, and then the sorting mole sorts all the received transactions according to the time, packs them into blocks, and sends them to all nodes. Note that the sorting mole does not perform any verification on the transaction, that is, no matter whether the transaction they receive is approved enough or not, as long as the format is correct, they are packed into the block. 5. All nodes verify whether each transaction has been approved enough. If so, indicate the valid transaction, otherwise, the invalid transaction. However, no matter what the result is, all transactions will be written into the account book. 6. Finally, if the transaction is successful, the node notifies the user that the transaction has been added to the ledger. Compared with the previous version, V1 has more of these things: 1. The sorting mole is logically disassembled, but in fact nodes can be sorted part-time. 2. With the addition of the approving agent, that is to say, only the approving agent will know the details of your transaction, while other nodes only verify whether they have been approved by the specified approving agent. 3. I don't write about it here, but there is one more thing called channel. Different channels are essentially different independent blockchains. Note: I am not a participant in this project, so the above introction is entirely based on my personal understanding of their documentation. There is very little about the existence of malicious nodes, a core problem of blockchain in their documentation, so I don't know how tolerant they are to malicious nodes. However, from the perspective of the structure itself, it is true that V1 has added a lot of functions, and the structure is very clear and flexible, which can support different application scenarios. However, from a theoretical point of view, there is not much innovation to speak of. The two main problems of blockchain technology, scalability and privacy, have not been solved. Although it claims to solve these two problems, it is actually based on the sacrifice of reliability and safety.

6.

To put it simply, blockchain is a decentralized system, with & lt; Ledger & quot; For example, traditional & lt; Ledger & quot; It is controlled by the center, while the blockchain & lt; Ledger & quot; Without a center, everyone involved can be & lt; Ledger & quot; Record

blockchain generally refers to public blockchain, family members, private blockchain and instry blockchain{ Conclusion< p> Blockchain technology provides a fair platform for the public. Xiaobian believes that the application scope of blockchain technology will be wider and wider

finally, readers are welcome to leave any comments on blockchain