Research and development of digital currency

1. Little brother, I will do it. What kind of virtual digital currency do you want to develop? I can basically operate it. The key is cheap!

2. There are a lot of development companies in this area, but we must pay attention to safety. blockchain is also a technology supported by the state, so many development companies have joined in. Recommended here: Sichuan Huashang Jusheng Technology Co., Ltd. With more than ten years of experience in Internet technology research and development.

3. Yes, and a lot of them
Ruitai currency: it is a digital currency designed with the participation of Sha Qian, a well-known digital currency scholar in China. It is an asset certificate, and credit endorsement is a medical equipment asset and part of the shares of Sha Qian Tong
Yuanbao coin: it was developed by Yuanbao team in China. Yuanbao coin is a relatively successful currency in China, and many related projects have been carried out
Qianjin card: developed by Qianfeng team in China, it is mainly used in Qianfeng mall and overseas luxury purchasing market.

4. The difficulty of development is not high, let everyone accept that the difficulty is heaven.

5.

Blockchain is the latest computer technology, the core is decentralized, distributed accounting. Digital currency is based on the underlying technology of blockchain. It can be said that without blockchain, there will be no digital currency. But without digital currency, there may still be blockchain. It's just that blockchain will be so hot, and it can't be separated from digital currency

in the future, digital currency will continue to develop. We can take advantage of the early stage to enter the digital currency and hoard some valuable digital currencies, such as Xunlei's playcoin

but at the same time, there is an unavoidable problem of digital currency, which is the lack of real economy support. At present, only a small part of the more than 1000 kinds of digital currencies circulating in the market rely on the economic support of miners. In other words, digital currency may be worth ten thousand yuan in the first second, but it may not be worth a minute in the second

therefore, before you make digital currency, you must investigate, analyze and choose carefully, so as not to cause losses to yourself

6.

The digital currency developed by the central bank has such a definition: encrypted digital string representing specific amount guaranteed and signed by the central bank . In a broad sense, digital currency includes a wide range of aspects, including electronic currency, virtual currency and legal digital currency. But strictly speaking, the digital currency developed by the central bank refers to legal digital currency

electronic currency is the digitalization of legal tender, including our common bank cards, Internet banking, electronic cash, Alipay and so on. No matter what the form of these electronic money is and through which institutions it circulates, its original source is the legal money issued by the central bank

In contrast, virtual currency is the electronization of illegal currency, and its original issuer is not the central bank. For example, Tencent Q coin and other game coins, such virtual currency is mainly limited to circulation in a specific virtual environment; bitcoin, for example, solves the problem of decentralization and distrust through blockchain technology, realizes global circulation, and is sought after all over the world. In other words, virtual currency can only be closed in the network circulation, and digital currency can be used for real goods and services transactions, but only the digital currency issued by the state is legal digital currency, bitcoin is illegal

the digital currency researched and issued by the central bank is indexed RMB, which belongs to legal encrypted digital currency from the perspective of national schemes, and it is not only a payment tool but also a currency itself< the purpose of digital currency issued by the central bank is to replace physical cash, rece the cost of traditional paper currency issuance and circulation, and improve the convenience and transparency of economic transactions

hope to adopt

7.

According to reports, since 2014, the people's Bank of China has set up a special research team, and further enriched its strength in early 2015 to conct in-depth research on digital currency issuance and business operation framework, key technologies of digital currency, and digital currency issuance and circulation environment

At the same time, digital currency is born in the existing financial system, which is bound to be affected by the existing payment system and information technology. Theoretically speaking, the payment system mainly deals with the demand deposit in the broad money, while the digital currency mainly belongs to the category of cash

Article source: bit110 network

8. 1. If the water in the watch is serious, it's better to send it to the watch shop to wipe oil to eliminate the water in the watch, so as to avoid the rust of the parts in the watch
2. In order to prolong the service life of the watch, try to avoid fog and water droplets in the waterproof watch. Don't wear the watch when washing face, bathing, swimming and other "hydrophilic" activities. Don't be affected by water vapor and hot vapor. In rainy days, pay attention not to be drenched
3. Bake the watch with incandescent lamp, cover the watch with several layers of paper towel, and then put it at 15cm of the 40 watt incandescent lamp, bake it for 5 minutes, and the water vapor in the watch will be evaporated. Remember not to bake too long, the watch with leather strap should be removed first
4. When the watch is flooded, it is better to go to a regular watch repair center or after-sales service as soon as possible. The faster you deal with it, the less you lose. Although the base plate and splint of watch movement are mostly nickel plated and rhodium plated, the surface of some steel parts has not been antirust treated. Once rusted, a loose rust layer is formed on the surface, which continues to absorb water and then accelerates the corrosion. If the delay is too long and the parts inside are damaged, it will cost more to repair. In serious cases, the whole watch will be scrapped directly.

9.

Why develop digital currency? From the perspective of the central bank, there are six advantages:

first, to improve the convenience and transparency of economic transactions; second, to rece the high cost of the issuance and circulation of traditional paper money; third, to better support economic and social development; fourth, to help the comprehensive realization of Inclusive Finance; fifth, to rece money laundering, to promote the development of the economy and society Sixth, improve the central bank's control over money supply and circulation

steps of digital currency development:

the first step,

first, we need to download the source code of a blockchain system from git, such as choosing the backbone code of bitcoin to download the relevant source code

At the same time, prepare the corresponding compiling environment (c + + is recommended in Linux) and install the corresponding development environment and tools

the second step and

code all need to be compiled, so you need to prepare the compilation environment and tools, download the environment compilation tools, configure

system environment variables, QT environment and other files, and compile commands are described in detail in the files in ITC source code

however, the construction of the system and development environment, program compilation and other processes are cumbersome, so it is not recommended for ordinary users to make their own. For developers, it may take 2-3 days to install and configure for the first time

the third step,

take bitcoin development as an example, it is the development environment of Q. after downloading the source code and configuring the environment, open the source code of the bitcoin core in qtcreator, configure relevant files and compilers, and start to try to compile the client of the bitcoin core

Step 4,

transform into your own digital currency, open each source file, find the corresponding local adjustment parameters, such as adjusting

the number of coins in each block, the total output, the adjustment difficulty, and so on. Then the most critical point is to change the name to your own currency

name as you want, and don't forget to replace the related icons in the resource folder. If all goes well, after re compiling, your new coin will be invented successfully

for the development of this digital currency, the technology is relatively professional, so it is better to have a professional team to assist

framework for digital currency development:

1. Build ethereum private chain test environment and public chain node environment configuration

2. Ethereum transaction and confirmation principle

3. Ethereum JSON RPC interface

4. Ethereum transfer and withdrawal principle

5. The server connects Ethereum public chain interface, and its own server stores business data, Public chain storage transaction anonymous data

6, private key security processing

the following is the development code example:

for example, the common digital currency wallets in the market are:

app class: kcash Imtokenweb: myethereumwallet Google browser plug-in: metamask

one of the most commonly used is imtoken

blockchain transaction technology concept:

let's take a look at how blockchain transaction is handled with bitcoin as an example. In order to send a certain amount of bitcoin to another wallet, you need the following information: the address to send the funds to your wallet, the amount of cryptocurrency you want to send

the ID of the recipient's wallet

each transaction is signed with a unique confidential private key. Once the payment is signed by the sender, it becomes publicly available. The transaction still needs to be confirmed so that the payee can get the money. In order to confirm the transaction, it is necessary to generate a new chain block

these blocks are generated by complex mathematical calculation to find the unique key. It takes 10 minutes to create a new block, and the person who finds the key gets a certain amount of coins as a reward. Once a new block of the chain is created, it is not possible to remove it from the database or change the information in some way. Therefore, blockchain transaction is final and irreversible

three core advantages of digital currency:

first, digital currency is a fair currency

digital currency has no specific issuing institution, is not issued by a country, only depends on a specific algorithm, which means that digital currency can not be manipulated by manipulating the number of issues, so digital currency is a free, non-state currency

we can see that there are many countries that directly recognize the virtual currency, so if there is a demand, it needs a trading platform

many investors who want to build a virtual currency trading platform now, why can't they go to these areas to build a trading platform? Building a virtual currency trading platform is a good business opportunity, isn't it

Second, the security factor of digital currency is higher.

although the emergence of paper money facilitates the transactions in our daily life, there are risks of being stolen and received. Although e-money can avoid these risks, there will be new problems such as theft and swiping

digital currency can avoid the above problems. And broadcast every transaction record on the network. Yes, all nodes save all the currency circulation information, so that any node can easily find the currency circulation before the transaction

Thirdly, the transaction of digital currency can realize anonymous transaction. Although you can query the flow information of each account according to the local complete transaction records

but we can't know who the owner of this account is, and no one has the ability to manipulate the digital currency on other people's accounts, which protects the privacy of users

if you also hold trading digital currency, foreign exchange gold, crude oil, contract Futures:

10. To be in a leading position in the world can be said to be the role of a leader. I hope that the more we fight, the more brave we will be.