Chinese meaning of blockchain pow

1.

In 2009, bencong invented bitcoin, and set that there are only 21 million bitcoins. By participating in the proction of blocks and providing proof of work (POW), he can get the reward of bitcoin network. This process is mining

the concept of "mining" comes from the existing concepts in our real economic life, such as gold mining and silver mining. Because minerals are valuable, it drives people to pay labor to dig

another important point of bitcoin mining is that the miners who participate in mining recognize the value of bitcoin, and some of them are willing to spend money in the bitcoin market. Therefore, the mining of bitcoin is meaningful

extended data

currency characteristics of bitcoin

1, decentralized

bitcoin is the first distributed virtual currency, and the whole network is composed of users without central bank. Decentralization is the guarantee of bitcoin's security and freedom

2, bitcoin can be managed on any computer connected to the Internet. No matter where you are, anyone can dig, buy, sell or collect bitcoin

3, exclusive ownership

controlling bitcoin requires a private key, which can be stored in any storage medium in isolation. No one can get it except the user himself

4, low transaction cost

bitcoin can be remitted free of charge, but in the end, about 1 bitfen transaction fee will be charged for each transaction to ensure faster transaction execution

5, no hidden cost

as a means of payment from a to B, bitcoin has no cumbersome limit of quota and proceres. If you know the other party's bitcoin address, you can pay

6, cross platform mining

users can explore the computing power of different hardware on many platforms

2.

POW: full name of proof of work

pos: proof of stake

both of them are the consensus mechanism of blockchain and the bookkeeping method of digital currency

the difference is:

1. POW mechanism: workload proof mechanism, that is, the proof of workload, is the requirement that must be met when generating a new transaction information (that is, a new block) to be added to the blockchain. In the blockchain network based on workload proof mechanism, the ability of nodes to obtain the correct numerical solution to generate blocks by calculating the numerical solution of random hash hash is the specific performance of node computing power

POS mechanism: the proof of rights and interests requires the certifier to provide a certain amount of ownership of cryptocurrency. The operation mode of the proof of rights and interests mechanism is that when creating a new block, the miners need to create a "currency right" transaction, and the transaction will send some coins to the miners themselves according to the preset proportion. According to the proportion and time of token owned by each node, the equity proof mechanism reces the mining difficulty of nodes proportionally according to the algorithm, so as to speed up the speed of searching for random numbers

extended materials:

the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, the open source software and the P2P network on it were designed and released. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system

unlike most currencies, bitcoin does not rely on specific currency institutions. It is generated by a large number of calculations based on specific algorithms. Bitcoin economy uses the distributed database composed of many nodes in the whole P2P network to confirm and record all transactions, and uses the design of cryptography to ensure the security of all aspects of currency circulation. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction

3. It's essentially a document. You can think of it as a notepad or word file, which records the transaction records of many people. It's just that the Notepad will be uploaded to the network through P2P, and another person can download the notepad with seed (the same thing as Xunlei). For a long time, everyone has such a notepad. If someone wants to make fake data, others will jump out and say that the data is fake. And there's an algorithm that makes it hard for you to make a fake data (POW)

by the way, it's not a panacea, nor is it

4. Due to the emergence of professional mining machines, it is basically impossible to use computers to dig bitcoin, and it is almost the same to dig some counterfeit coins. However, the emergence of LTC miner of Leyte coin has actually announced that it is impossible to prevent miner of all POW algorithm currencies. As long as a certain kind of currency is popularized, its miner will appear accordingly. It is suggested that you can take a look at diandianbi (the originator of POS algorithm), the algorithm that can really prevent mining machine.

5. Probability problem, but I suggest you don't pay first, see clearly. In addition, more observation of that friend's life and your relationship, true or false in such a little information is impossible to judge

6. Public chain: an open and ecological trading network, which mainly provides global trading network for instry chain and private chain
because the private chain is a closed ecological storage network, that is to say, the traditional distributed consistency model should be optimal; Due to the semi closed and semi open characteristics of alliance instry chain, the use of delegated proof of XXX is the best. We can consider adding Byzantine fault tolerance / security protection mechanism to improve the traditional consistency algorithm
public chain POW should still be the best choice
bitcoin, Ruitai coin, Laite coin and doggy coin all use pow.

7. Bitcoin system will allow each node to join the network to carry out hash operation. Whoever works out a suitable solution first can get the accounting right this time. Once the bookkeeping right is robbed, all nodes will start to fight for the next bookkeeping right, that is, hash operation.

8. POW function is a function of power,

function prototype is double pow (double a, double B)
the math.h header should be included when using<

1, mathematical function editing in C / C + +
prototype: in TC2.0, the prototype is external float pow (float x, float y), In VC6.0, the prototype is double pow (double x, double y)
header file: math.h/cmath (in C + +)
function: calculate the Y power of X
return value: if x cannot be negative and Y is a decimal, or if x is 0 and Y is less than or equal to 0, the result of power exponent is returned
return type: double, int, float will give warning<

2, overload editing of pow functions
C + + provides the following overload forms of pow functions:
double pow (double x, int y)< br />float pow(float X,float Y);< br />float pow(float X,int Y);< br />long double pow(long double X,long double Y);< br />long double pow(long double X,int Y);
the parameter type should be set reasonably when using to avoid multiple "pow" instances matching the parameter list
among them, overloading is more likely to occur when using shapes such as:
int, x, y< br />int num=pow(X,Y);
this is a commonly used function, but the compiler will remind that there are multiple "pow" instances matching the parameter list
casts can be used to solve this problem: num = pow ((float) x, y);