BTC assembly utxo

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. You are right. Indeed, it will be rolled back. If the transaction is unfortunately packaged on the fork, the transaction is likely to be cancelled after the main chain is synchronized

the reason why we need six confirmations is that it is more difficult to obtain the optimal solution (to prevent single node fraud). One block may also be able to get an optimal solution, and it is basically impossible to get six blocks together. It has nothing to do with bifurcation

4. No, the transaction that belongs to you, that is, your utxo will be saved to your bitcoin wallet file, and each payment will be found from your wallet database. If you lose the contents of your wallet, you can use your key information to access the service node to retrieve your utxo. If you lose the key, don't worry.

5. The Chinese meaning of utxo is called: no cost transaction output
utxo is an account model in digital currency, which is different from our current bank account model< Taking transfer as an example, the current situation is:
I want to transfer 2000 yuan to Yiyi. I want to transfer 5000 yuan to her from my China Merchants Bank card. After transferring 2000 yuan to her, 2000 yuan will be dected from my China Merchants Bank account and 3000 yuan will be left
if it's utxo based on bitcoin, the situation is like this:
I have 5000 bitcoin, I transfer 2000 bitcoin to Yiyi, and 2000 bitcoin is consumed, right? be careful! This 2000 is not dected from my 5000 total. Instead, my total bitcoin will be divided into two parts (one is
2000, and the other is 3000). This is called "generating two new utxos": Yiyi takes 2000 bitcoin, and I take 3000 bitcoin myself. 3000 is my change
after the successful transfer, the 2000 bitcoin I gave Yiyi has been used and consumed, so it can no longer be called utxo. However, the 3000 bitcoin I gave my change has not been used yet, so it can also be called utxo, that is, the transaction output that has not been spent. Then, if I have 5000 bitcoins in total and I transfer them all to Yiyi, I just need to generate a new
utxo to Yiyi, and there is no need to change it
based on utxo, every transaction should confirm the situation before bitcoin and check whether bitcoin exists in my utxo. If not, the system will reject your transaction
in this way, the input and output of each transaction are related, which can be traced back to the birth of bitcoin, that is, the source of mining, through utxo
If I want to send the same utxo to two people, the system will only confirm the first one received. Once it is confirmed that utxo has been consumed, you can not transfer it to the next person, thus avoiding the problem of double payment
since the system only confirms the one received first, the problem arises. How does the system know who is first and who is second? Of course, the system knows, because the system has something called "time stamp".

6. The development is OK. I think it is more stable than other platforms.

7. Be careful in investment and financial management. Don't trust others. Learn more about it and read more professional books. Don't think about making big money in the short term; We should realize that financial management is a matter of life, not a matter of time. Investment and financial management is generally easy to lose money, and it is even more difficult to earn the lost money back. Now there are too many chaos in the financial market, and there are many people who run away from the black platform. You are greedy for other people's high profits, and others want your principal. You must go to a legal platform, at least you will not lose the principal. Money is not so easy to earn, Only if you are more professional, can you make money for a long time. Do what you know, understand, don't understand, unprofessional, that's temptation, and you will lose in the end.

8. Compared with the transaction on the chain, the utxo set of BCH network is also growing. The growth of utxo increases with the adoption rate, and the scale of utxo has soared since September 2018
utxo is the abbreviation of unspent transaction output, and transaction act is pronounced as X. Utxo is the first specific technical solution adopted by Nakamoto in bitcoin. In the design of bitcoin, there is no account concept

9. I talked with the teachers of Yingfu College of Finance and economics, and they explained some information about this. In bitcoin transactions, utxo is usually regarded as the basic unit. Once it is created, it can not be divided, and can only be spent in the next transaction, resulting in a new utxo

therefore, the account balance of bitcoin is calculated through the user's utxo.

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