Bitcoin coinbase format
Novice first of all to know how to calculate your cost, recharge, trading, cash, there are fees. At least you can understand the K-line. There are a lot of people on the K-line. You can look at it casually and understand it. You need to be risk aware. bitcoin is a high-risk and high profit investment. It may double overnight, or BMW may become a bicycle overnight. At the beginning, we suggest a small amount of investment
but it's hard to get bitcoin for indivial mining, so it's basically large-scale mining, and you need to cooperate with the mine pool. So if you still want to make money by mining, at present, the most suitable mining method is cloud mining or mining machine hosting. After all, the era of single person mining is over
a person signed by Nakamoto Tsui has put forward a revolutionary idea: let's create a currency that is not controlled by the government or anyone else! This idea is crazy: there is no asset support behind a string of figures, and no one is responsible for it. How can anyone accept it when you pay it to the other party as money
Merkle tree
looks like a binary tree, but this is the lower two nodes. Take the hash value to get the upper node. Just remember the root node to detect whether the whole tree has been tampered
the root hash value is stored in the block header, and the transaction process is stored in the block body. All nodes include block header and block body, but light nodes (such as bitcoin wallets on mobile phones) only include block header. This tree can prove that a transaction has been written into the blockchain
3. Consensus agreement
two issues should be paid attention to in decentralized currency:
1. Who can issue digital currency: mining
2. How to verify the legitimacy of transactions: blockchain
double spending attack
double spending attack is a major challenge of digital currency
all transactions in bitcoin have input and output. Where does bitcoin come from and where does it go
under normal circumstances, there may be two bifurcations, because two nodes obtain the bookkeeping right at the same time, and the two nodes package the block and calculate the random number at the same time. At this time, the two bifurcations will coexist temporarily until one of the blocks finds the next block first, which becomes the longest legal chain, and the other one is discarded<
Sybil attack
a malicious node keeps generating accounts. If the total number of accounts exceeds half of the total accounts, it obtains the control of the blockchain
consensus protocol in bitcoin
some nodes are malicious, and most nodes are good
idea 1: pack some transactions into blocks as candidate blocks, let each block vote, and write them into the blockchain if they pass
No, because some malicious nodes have been publishing blocks containing malicious transactions, and they have been voting and occupying resources. And some nodes don't vote<
idea 2: vote not by the number of accounts, but by computing power. Each node can generate legal transactions and put them into the block. These nodes start to try random numbers until H (block header) ≤ target is found, then this node has the right to account
the only way to generate bitcoin
coinbase transaction. There is no need to point out the source of the currency. If you have the bookkeeping right, you will get a reward< br />
50BTC-> 25BTC-> 12.5btc, the reward will be halved for every 210000 bitcoins
the process of bitcoin competing for bookkeeping rights is called mining. The node competing for bookkeeping right is called miner.
1. Bitcoin by watching video
coinbase, a bitcoin exchange in the United States, launched a project called "coinbase earn" two years ago. You can get various digital currencies by watching some blockchain or bitcoin knowledge videos, and then answering some multiple choice questions. This kind of virtual currency is similar to collecting wool and can earn hundreds of dollars in general. But you have to register as a user first
2. Bitcoin loans earn interest
if you already have some bitcoin, you can earn bitcoin interest by borrowing. You are like a bank, lending your bitcoin to another person at a certain interest rate. Because the market is not regulated, interest rates are usually much higher than standard bank rates, which means there is potential for high returns. But there are also risks. What if the other party doesn't pay you back? Therefore, we need to choose some third-party P2P intermediary platforms to borrow, such as blockfi, NEXO, btcjam, bitbond, etc
3. Get bitcoin by doing tasks
everyone has more or less come into contact with some online earning platforms. You can register an account on the online earning platform, and then do some small tasks to get a few cents' income. These tasks include registering an app account, downloading an app, and so on. Bitcoin can also be obtained by doing tasks, which is the simplest way to get bitcoin. That is to say, the revenue from bitcoin is not much, and it is time-consuming
4. Take bitcoin for watching ads
some websites encourage users to watch ads or click on ads, and then pay users bitcoin as a reward. In fact, this is also a task of the nature of the site, your task is to go to other sites to see advertising or click advertising. At present, the well-known task publishing platform is ads4btc, which allows users to watch ads for 5 seconds, 10 seconds or 20 seconds, and then users earn bitcoin rewards
but the reward is very low. According to the price offered by ads4btc, if you watch ads all day, the income will not exceed $10, so it may not be a feasible choice for most people. Unless there is a cheating machine, it can replace you in advertising
5. Bitcoin faucet
bitcoin faucet is the most popular way to collect wool in coin circle. In December 2010, in order to let more people know and try to use bitcoin, Gavin andresson, member of bitcoin core development team, bought 10000 bitcoins for $50 and created a website called "bitcoin faucet". At that time, as long as you visit this website, you can get five bitcoins for free, which was worth about 5 cents at that time. This has a significant effect on people's acceptance of bitcoin
on the morning of January 27, 2015, the first U.S. bitcoin exchange with formal license, founded by bitcoin company coinbase, will officially open on Monday
on January 17, 2017, the head of the New York Financial Services Department (nydfs) announced that it had passed the license application of the bitcoin trading platform coinbase, which means that coinbase's operation in New York State has finally obtained the official certification
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To register an account in coinbase, you also need a bank card that supports US dollars, such as visa and MasterCard. You can buy bitcoin by recharging US dollars on the platform
1. To register a coinbase account, the first step is to register a coinbase account. This will give you a safe place to store your bitcoin, and a simple way to exchange your local currency and bitcoin
< EM > question < / EM >
< EM > what is coinbase
< EM > A: < / EM >
< EM > is a bitcoin wallet service. You can collect and pay by opening this account. Similar to Alipay, money paid to bitcoin. em>
in Australia, in the past two years, Australian banks stopped providing banking services for bitcoin business, and the Australian government imposed double taxes on bitcoin transactions, which led to the escape of startups and exchanges related to bitcoin business overseas. Australia's bitcoin exchange market is significantly behind the growing markets such as South Korea and Japan. It is understood that Japan and South Korea currently control more than half of the global bitcoin exchange market share.
Yes, coinbase requires users to provide access rights to the webcam when they register. It requires users to turn on the webcam to take their own photos and submit them