CCC digital currency update
response time: July 14, 2020. Please refer to the official website of Ping An Bank for the latest business changes
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2019 August 21st, the official account of WeChat central bank released two articles on digital currency.
coinbase transaction is a special transaction that generates bitcoin "out of thin air". Only miners can write this kind of transaction, and the number of generated bitcoin is limited by rules (new currency reced by half for every 210000 blocks + transaction fee for this block)
however, the rules do not stipulate that the miner must take away all the rewards that can be taken, and can choose not to take them
therefore, a mine pool connected with the RSK side chain has made a bug before, forgetting to take away the reward and occupying a pit in a block for nothing, which is equivalent to destroying the corresponding amount of bitcoin, making the total amount of bitcoin decrease a little bit permanently
in addition, to spend a bitcoin, you only need to specify the transaction ID and output serial number
as like as two peas in multiple blocks repeatedly write identical coinbase transactions, the transaction ID is also repeated.
therefore, this kind of situation also occupies the pit of a block in vain, and permanently destroys the corresponding amount of bitcoin
it seems to me that this is still a security vulnerability, so the new version of bitcoin software later banned the writing of repeated coinbase transactions. But until now, there has been no ban on miners not getting their e rewards
generally speaking, a coin is controlled by a private key. If a coin is transferred to an address where no one knows the private key, it will be destroyed
if the owner does a good job in security, and the private key is not disclosed and cannot be guessed, but he accidentally loses the private key, it is equivalent to destroying all the coins he owns
there are only some special circumstances that require intentional destruction of coins
one is irreversibly converted into another kind of currency, such as the contract currency XCP attached to bitcoin and wormhole cash WHC attached to BCH
the second is to save certificates and data on the chain, such as the time stamp: panbiao.com/2013/08 /
and the crowd funding of the original Ethereum founding team: zhuanlan.hu.com/p/29
the private key is essentially a big number. Whoever knows this number can control the currency on the corresponding address. So the private key must be generated with reliable random number, otherwise it may be guessed and stolen
compared with the token, the address is the hash of the public key. There is no way to judge whether an address has a corresponding public key and private key (even if the public key is known, the corresponding private key cannot be known). Therefore, even if it is explicitly the address of "burned" token, the system does not prohibit the transfer in
strictly speaking, what locks the currency is a small program (script). This program takes the input as the public key and digital signature. First, check whether the public key hash is consistent, and then check whether the digital signature is valid. If it is valid, it will be verified and transfer is allowed; Otherwise, it will be judged that the transaction is illegal and refuse to package into the chain
it is the whole node software that explains and executes this program. It can be said that the software code of the whole node specifically defines a coin
however, the current situation is very embarrassing. Most miners do not run the whole node, only a few mines are running. The vast majority of users do not run the whole node, even if they run the whole node, they can only perform verification, no computing power, no block.
without this calculation, the whole system is not secure, so these seemingly meaningless calculations are to ensure everyone's security
People often talk about these initiatives in the context of digital money supply. In fact, more than 90% of the money in circulation has become digital money. In most instrial countries, only about 10% of the money is in the form of physical cash. The central bank is making a huge investment to further accelerate and simplify the digital payment process. In the US, the Federal Reserve will soon unveil a new solution, fednow. It can support nationwide real-time electronic payment. In addition to the United States, Britain, Australia, Mexico and Nigeria have also built and deployed similar infrastructure
what we are doing now with Hong Kong is just routine technical testing. When the time is ripe, digital currency can be applied in the scenario of cross-border payment now digital goods are developing faster and faster, and each country is developing its own digital currency. In the case of existing technology, digital currency at the national level certainly has no technical obstacles
in order to promote the application of digital currency, countries are also trying to carry out various tests. On the technical level, digital currency has no barriers, but cross-border projects are not just technical. Digital currency has a long way to go{ RRRRR}
Third, digital currency is far away from internationalizationdigital currency is now in the pilot stage of a few cities in China. But the promotion of domestic application scenarios also takes time. Although there are no technical barriers for digital currency, after all, digital currency involves a wide range of aspects, and the promotion of digital currency can not be completed overnight
now when digital currency is promoted in China, it is easy to carry out cross-border projects after accumulating enough experience and waiting for the right time
for & lt; Digital currency & quot; If you have any different opinions on the progress of cross-border projects, please leave a message in the comments area
It can not be said to be a fraud, but there are certain risks, because digital gold currency is a form of physical currency, and its deposits are measured in gold rather than legal currency. Therefore, the purchasing power fluctuation of digital gold currency is related to the gold price. If the price of gold goes up, it becomes more valuable. If the price of gold goes down, it loses value
since there is no specific financial regulation to regulate digital gold money suppliers, they operate in a self-regulation way. Digital gold money suppliers are not banks, so banking regulations are not applicable
extended data
to explore the connotation of digital currency, we must clarify some concepts of model lake. For example, is it legal digital currency dominated by the central bank or illegal private fixed digital currency; Encryption of digital currency or electronic currency; Is it "selling dog meat with sheep's head"; "Bad money"
new technology does make the conceptual boundary of money more blurred. Theoretically speaking, the new monetary economics points out the possibility of the disappearance of money, that is, legal paper money is no longer the only medium of transaction, and is eventually replaced by financial assets issued by the private sector that generate monetary income
in reality, although the status of fiat money is still unshakable, there have been various local scenes of private money in history, such as the universal warra system in Germany in the 1920s. Now the digital currency with the characteristics of decentralization makes the challenge of private currency increasingly prominent< br />