What's wrong with quic digital currency

5. 1. It depends on what type of graphics card you use for mining. The computing power depends on the performance of your graphics card
2. If you have the conditions, it is recommended to use high-end graphics cards of big brands for better mining effect.

6. How fast is the money in and out of digital currency? It's faster to get in and out of the fund, but it's more risky to invest.

7. Which digital currency is safe? Now the safest thing is bitcoin, but you have to bear its ups and downs.

8. Version of block version

hash value of previous block: prev_ Hash

the hash tree value of the transaction to be written: Merkle_ Root

update time: ntime

current difficulty: nbits
the process of mining is to find x to make
sha256 (version + prev)_ hash + merkle_ root + ntime + nbits + x )) < Target

the range of X in the above formula is 0 ~ 2 ^ 32, which can be calculated according to the current difficulty. In addition to x, you can also try to change Merkle_ Root and ntime. Because of the hash feature, finding such an X can only be brute force search

once you find x, you can broadcast a new block, and other clients will verify whether your block is legal. If your block is accepted, the first transaction in each block must be to send the newly generated 25 bitcoins to an address. Of course, you will set the address to your own address to get the 25 bitcoins< Every transaction record of bitcoin from the beginning to now has been saved on the network. The whole bitcoin network maintains a huge transaction record file (about 12g now). The average update cycle of this file is 10 minutes. The newly added transaction record is called a block, and this huge file is composed of a series of blocks, called block chain.

Why are 25 bitcoins
this is the rule. At first, there are 50 bitcoins. For each half of the remaining bitcoins, the income will be halved. In this way, the total amount of bitcoins that can be generated will approach 21 million. If you still claim to have g up 50 bitcoins, it will not be accepted by other clients, and the block will be g up in vain

how to ensure that the average update cycle is 10 minutes
the smaller the target, the more difficult it is to solve X. for every 2016 blocks (about 14 days) generated, the network will adjust the target according to the average interval of new blocks generated ring this period

is it the fastest person who always solves it first
No. You always want to take the mining income as your own, so when everyone calculates, the address to send the mining income is different, so Merkle_ Root is different, that is to say, everyone starts to solve from a different initial state

how to solve it at the same time
there will be a fork in the block chain. Some clients accept a and some accept B. until a branch becomes longer, everyone will choose the longer branch. If what you dig is unfortunately not selected, your mining income will be invalid

since I choose a longer branch, how can I solve it with very low difficulty
the client finds the most difficult and longest branch among many branches

are these calculations wasted
if you want to spend a sum of money twice, you need to do so. Dig a new block, but hide not broadcast, and continue to mine. Find merchant a, pay bitcoin, and let others on the network dig the block and write the transaction record. Find merchant B, pay bitcoin, and write the block you g. If you can get two blocks first and broadcast them, everyone will take your longer branch as the current block chain, and the bitcoin received by merchant a will not be recognized. In this way, the probability of successful attack depends on the speed of hash calculation. If the computing power of the whole network is high enough, the success rate of such attacks is very low or the cost is very high.

9.

The problem of second-hand housing transaction, as I said before, is not the problem of procere, but the problem of people. Why do people have problems

There are too many sellers who always want to sell more money

most of the second-hand housing transaction inquiries received in recent days have paid a deposit or down payment, and the seller is extremely unwilling to cooperate with the transaction and transfer of ownership. Why

either you don't apply for online signature, which means that there is a risk that the suite may be sold for two rooms

some people sign online, but when they handle a bank card of a regulatory account, they get stuck, and the transaction is shelved

What's the most wonderful thing

there is a netizen who ordered a second-hand house in early March, paid 20000 deposit, wrote when signing the contract, paid the down payment at the end of March, handled the transfer proceres at the end of May, and moved to deliver the house in October

what should we do if all the contracts are signed

the key is to go home and think about it, which takes too long, right

as time goes on, any change is likely to happen. What should we do when the house price rises, what should we do when the policy changes, and what should we do when there are problems in credit investigation ring this period

What is the most critical point

If you don't pay the down payment at the end of the month, you will breach the contract and pay 5 times more down payment as compensation according to the agreement

The fairness of this agreement will not be mentioned for the time being

let's talk about how and on what basis to sign such an agreement

First, we should think about signing the agreement

generally, when you sign an agreement with an intermediary, many friends who buy a house don't look at the agreement at all. Even in that kind of atmosphere, even if you look at it, you can't see many words, and some of them sign it directly

this is actually wrong, but we need to look at every word and sentence of some protocols and understand them

it's too late for many buyers and sellers to read the agreement after they go home. How can they think about it

return is a breach of contract. There is no chance for this kind of agreement to return, especially for some sellers

the seller's return is only a loss, and there is no room for bargaining. Why

you pay the money, but the house hasn't been transferred. What can you do to delay you for a few months? What's the key? Why don't you think about it

even if it is feasible, you don't even have the patience to see the agreement in the intermediary. How can you wait half a year to complete the transaction of a house

First, when signing an agreement, you must verify the agreement, understand the agreement, sign it, and then press the fingerprint

Second, it depends on the terms. Is there any loophole that you can't accept? For example, if you don't want to hand over the house in October, don't sign the agreement. For example, if you don't agree, the interval is too long, then don't sign the agreement. Why

we need to set up our own framework and standards, sign if they meet the requirements, and do not trade if they do not meet the requirements. Why

even if you spend more money, you can't be cheated, right

Second, there is a key issue in the transfer process, which one should pay the down payment to

there is a strict procere for when to pay the down payment, to whom to pay it and under what conditions. If the procere is not correct, there will be no transaction

(the above answers were published on March 27, 2017, and the current relevant house purchase policies are subject to the actual situation)

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