Blockchain 20 time

1. The time limit for developing a blockchain application app, such as starting technology, is estimated according to the functionality of the app. Generally, the development time is about 2-3 months, and the specific time is estimated according to the needs of customers, mainly the development time. If the functions are multiple and more complex, there will be more things to develop and design, and the time will be longer. For example, in another case, the existing source code can meet the requirements, and only need to add or modify some functions will be very fast.

2. It mainly depends on the personal foundation. It's less than three months fast.

3. If it refers to the first block g up, on January 3, 2009, Nakamoto Cong g up the first block on a small server in Helsinki, the Netherlands, which is the so-called "Genesis block". For information about blockchain, you can learn more about it in mimacaijing.

4. digital currency will not be stolen in general. If you use a regular wallet and invest in a regular digital currency, there will be no problem!

5. In order to prevent the double spending problem, the system will automatically time stamp the transaction information of each block and mark it with time brand. How much money you spend at this time is spent. It has been recorded and can't be used to buy other things
how to record it? In fact, the time stamp and other transaction information on the block are calculated to obtain an encrypted value, which is called "hash value". Each new block contains the hash value of the previous block, thus forming a blockchain
so we say: bitcoin system is actually a layer by layer nested, never-ending, very powerful timestamp system, which uses timestamps to ensure that each block is linked into a "chain" (that is, block chain) in chronological order
from this point of view, time stamp literally means to time stamp a block. Its practical function is to provide an important parameter for later hash value calculation, which is an essential and very important information in the process of calculation and verification
finally, we summarize the content of this section. This section mainly introces two terms: utxo and timestamp. These two concepts are important means to solve the "double flower problem", which can ensure that bitcoin can not be used many times without a third party organization.

6. A timestamp, usually a sequence of characters, uniquely identifies the time of a moment. Digital time stamp technology is a variant of digital signature technology
time stamp refers to the total number of seconds from 00:00:00 GMT on January 1, 1970 (Beijing time: 08:00:00 GMT on January 1, 1970) to now
to put it simply, a time stamp in a blockchain means that whatever happens at a certain time will be recorded on the blockchain. For example, the blockchain content publishing platform decent, when someone publishes some information on it, the information will be recorded from the moment of release, which can't be changed. The time of occurrence is fixed and can't be changed.

7. At present, Internet breeding software includes all people raising cattle, Lenong's home, Aishang raising pig, chicken housekeeper, ugly ckling farm, etc. all people raising cattle, falling in love with raising pig and chicken housekeeper are income oriented apps with little user interaction. They are investment income oriented apps. Ugly ckling farm is an app developed by Shenzhen ugly ckling Innovation Technology Co., Ltd., focusing on user breeding experience, Real time online breeding and offline breeding can be synchronized. Those who have children at home and need to raise their own cks to supplement their families can raise their own cks and eat by themselves through this platform, which is visible in real time, green and pollution-free, and recommended by the wall.

8.

Vpay, full name is visual payments, Chinese means virtual payment. It was first established in the United States as a platform for digital currency trading, such as bitcoin, quark coin, Leyte coin, etc

vpay is a payment platform for the circulation of digital currency, which was created by Mark & Chen 9642, a former technology executive of Google; Created by Milo. Vpay is a platform without borders, digital trading platform, international shopping mall platform, like Alipay and WeChat. The difference is that Vpay is developed by the most popular block chain technology in the financial circle since 2017. It can achieve cross border transfer without any spot, and there is no fee. p>

extended data

digital currency is short for digiccy, which is the abbreviation of "digital currency" in English, and is the alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy

digital currency is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of a specific virtual community. The European Banking authority defines virtual currency as a digital representation of value, which is not issued by the central bank or authorities, nor linked with legal currency. However, because it is accepted by the public, it can be used as a means of payment, or it can be transferred, stored or traded in electronic form

9. All day trading... The website has no rest

10. Generally, there is only one approximate time cycle for the development of blockchain application app. For example, starting technology mainly depends on its functions and complexity. Generally, the development time is about 2-3 months. The specific time is estimated according to the customer's needs, mainly the development time. If the functions are multiple and more complex, there will be more things to develop and design, and the time will be longer. For example, in another case, the existing source code can meet the requirements, and only need to add or modify some functions will be very fast.