BTC confirmation time

1. First of all, you need to understand the time point of bitcoin mining:
a total of 2100W bitcoins are issued, and each block is generated for 10 minutes, and a block rewards a certain number of bitcoins. In the beginning, 50 bitcoins were awarded for each block of mining. In the future, the reward was halved for every 21000 blocks (about once every four years). Now, 12.5 bitcoins are awarded for each block generated. The generation time of each block is 10 minutes, but with the development of computer technology, now the mining calculation power is increasing, so the generation time of a block must be less than 10 minutes, which requires certain control measures to ensure this time. This measure is the difficulty of mining. If the output time of each block is less than 10 minutes, the difficulty of mining will be increased. If the output time is more than 10 minutes, the difficulty of mining will be reced. The difficulty adjustment time is 2016 blocks, that is, 2 weeks
after every 2016 blocks, all nodes will automatically adjust the mining difficulty according to a certain formula. This formula is obtained by comparing the latest time spent in 2016 blocks in this cycle with the expected time (20160 minutes, i.e. two weeks)
new difficulty = old difficulty * (time spent in the past 2016 blocks / 20160 minutes)

2. Bitcoin receives payments almost instantaneously. However, there is an average delay of 10 minutes before the network starts adding your transaction to a block to confirm the transaction and that you can use the received bitcoin. Confirmation means that there is a consensus on the Internet that the bitcoin you receive is not used to pay others, so it is recognized as your property. Once your transaction is included in one block, all subsequent blocks will include it, which will greatly consolidate this consensus and rece the risk of transaction cancellation. Each user can determine the time when the transaction is confirmed, but generally speaking, receiving six confirmations is as safe as waiting six months after a credit card transaction
anyone can become a bitcoin miner by running software on specialized hardware. Mining software monitors transaction broadcast through P2P network and performs appropriate tasks to process and confirm these transactions. Bitcoin miners can earn transaction fees paid by users to speed up transaction processing and additional bitcoin issued according to fixed formula

new transactions need to be included in a block with mathematical workload proof before they can be confirmed. This kind of proof is hard to generate because it can only be generated by trying billions of calculations per second. Miners need to run these calculations before their blocks are accepted and rewarded. As more people start mining, the difficulty of finding effective blocks will be automatically increased by the network to ensure that the average time to find a block remains at 10 minutes. Therefore, the competition for mining is very fierce, and no indivial miner can control the content contained in the block chain
workload proof is also designed to rely on previous blocks, which forces the time sequence of block chain. This design makes it extremely difficult to cancel previous transactions, because the workload proof of all subsequent blocks needs to be recalculated. When two blocks are found at the same time, the miner will process the first block received, and once the next block is found, it will be transferred to the longest block chain. This ensures that the mining process maintains a global consistency based on processing capacity
bitcoin miners can neither increase their rewards by cheating, nor deal with the fraulent transactions that destroy the bitcoin network, because all bitcoin nodes will reject the blocks containing invalid data that violate the bitcoin protocol rules. Therefore, even if not all bitcoin miners can be trusted, the bitcoin network is still secure
if you still don't understand, go to bitcoin home to see the deeper understanding of netizens.

3. It seems to take half an hour to an hour. Generally, one confirmation is enough, but some platforms need three to five confirmations.

4. If you want to ensure the irreversibility of the transaction, you have to wait for six data blocks to be fully confirmed, which takes at least one hour to confirm.

5. Generally, only the payee can return bitcoin after 24 hours. Any bitcoin transaction is irreversible and can only be returned by the payee.

6.

Transaction mode of bitcoin

bitcoin is e-cash similar to e-mail, and both parties need "bitcoin wallet" similar to e-mail and "bitcoin address" similar to e-mail address. Just like sending and receiving e-mail, the remitter pays bitcoin directly to the other party through a computer or smart phone according to the recipient's address. The following table lists some websites that download bitcoin wallets and addresses for free

a bitcoin address is a string of about 33 characters long, consisting of letters and numbers, always starting with 1 or 3, such as & quot& quot; Bitcoin software can generate address automatically, and it doesn't need to exchange information online, so it can be offline. More than 2 bitcoin addresses are available. Figuratively speaking, there are about two grains of sand in the world. If there is an earth in each grain of sand, then the total number of bitcoin addresses far exceeds the number of all the sand on all these "earths"

the bitcoin address and private key appear in pairs, and their relationship is just like the bank card number and password. A bitcoin address is like a bank card number, which records how much bitcoin you have on it. You can generate bitcoin address at will to store bitcoin. When each bitcoin address is generated, a corresponding private key of the address will be generated. This private key proves that you have ownership of the bitcoin at that address. We can simply understand the bitcoin address as the bank card number, and the private key of the address as the password of the corresponding bank card number. Only when you know the bank password can you use the money on the bank card number. Therefore, please keep your address and private key when using bitcoin wallet

after the transaction data of bitcoin is packaged into a "data block" or "block", the transaction is initially confirmed. When a block is linked to a previous block, the transaction is further confirmed. After six block confirmations in a row, the transaction was irreversibly confirmed. Bitcoin P2P stores all transaction history in a "blockchain.". The blockchain continues to extend, and once new blocks are added to the blockchain, they will not be removed. Blockchain is actually a distributed database composed of a group of scattered client nodes and all participants, which is a record of all bitcoin transaction history. Nakamoto predicts that when the amount of data increases, users hope that not all the data will be stored in their own nodes. In order to achieve this goal, he uses the hash function mechanism. In this way, the client will be able to automatically eliminate those parts that it will never use, such as some very early bitcoin transactions

7. Almost instantly to the account, this problem may be delayed, you refresh the page, it may also be not closed, your order is still in the Commission

8. The worst thing is not to transfer bitcoin directly from one trading platform to another, because some platforms do not support this transfer method. It is better to withdraw bitcoin from one trading platform to the wallet, and then transfer the coin in the wallet to another trading platform
in this case, it's better to consult the customer service staff of the platform. Similar situations may be encountered with counterfeit coins such as Wright coin, Ruitai coin and dog coin.

9. Hello, let me answer your question

1 this question is very important. The foreign exchange market is different from the stock market. It has no exchange and is a discrete global trading mode. The essence of the foreign exchange market is the inter-bank market, that is, the market in which the world's major banks trade with each other. Because the trading volume between them is very large, ordinary investors can not participate in it, so there is a platform business. These platform providers build a bridge between retail investors and the interbank market. When retail investors place an order, they are actually trading with the platform business, and the platform business uses the funds of retail investors to trade with the bank. So, it is the platform that provides you with margin service, and the margin will stay on the platform for the time being. As for the economic line you mentioned, it is actually a secondary agent. They are the agents of platform companies, so they charge more commissions

2 your reasoning is a little complicated, so you should try to use the common measurement standards of foreign exchange instry for calculation. Take Europe and the United States as an example, assuming that the exchange rate is 13000, we call one ten thousandth of the exchange rate 1 point. One hand contract is US $100000. Suppose our account is US $10000 and the margin is 1%. Now we buy a first-hand contract with a margin of $1000. At this time, the margin balance is $9000. If the exchange rate drops by one point, our balance will decrease by 10 US dollars. If the exchange rate drops 900 points, the margin balance becomes zero. These changes are reflected in your account, and they are all immediate
in fact, when the margin balance is close to zero, it is generally about 10 points, that is, about $100, the platform will force you to close the position, that is, the so-called burst position. At this point, you have about $1100 left in your account. In actual transactions, margin is used to prevent sudden major changes in the market price, generally will not be used. Therefore, there is no need to worry about platform providers

however, in order to win customers, the mainstream platforms often adopt more radical methods. When the margin balance is zero, they still keep the position of retail investors and start to lose margin. Take the above example as an example, the margin balance begins to turn negative. For every 1 point decline in the market, the margin decreases by $10. When the margin remains about 10 points, that is, about $100, the platform will forcibly close the position. At this time, the account balance is only about $100, which is a complete burst

I think the above answers your third question at the same time

4 if you buy Canada Japan, platform vendors actually need to use US dollars as a bridge to exchange for two times, so the gap between Canada and Japan is the sum of Canada and the United States and Japan, or even larger. However, as a retail investor, you don't have to think too much about it. It's all the work of the platform Shang Dynasty. You just need to know that if you add one day fluctuation point, 0,1 contract fluctuation is 1 / (0.01 * US Japan exchange rate) US dollars

however, it is worth mentioning that the euro / yen exchange rate in the cross section is quite special, because the trading volume is very large, it is often direct trading, and it does not need to be mediated by the US dollar, so the currency spread is relatively small on many platforms

I hope I can help you.