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❶ What are the blockchain and digital currency application apps?

ChainStore is a professional application store that integrates all mainstream applications in the blockchain and currency circles. It integrates exchanges, wallets, market software, tool software, blockchain information, blockchain games, industry applications, etc.
Compared with other app stores, ChainStore can not only download blockchain industry applications, but also browse the latest airdrop candy information and high-quality blockchain projects. It is an app for people in the blockchain industry. Comprehensive service app.

❷ How to develop blockchain mobile wallet app software

Rely on third-party platforms

Clear your own needs, understand the code, and be familiar with the development process

Complete APP development process

Early stage of APP development

Developing mobile APP requires understanding of product positioning

Determine the needs for APP development and position the APP. To develop and produce an APP software, you need to first understand the needs of the Bizhenlan App application market. This is a rigid standard

Evaluation

Make the overall situation of the project as detailed as possible , evaluate whether the APP development project can be completed within the specified time limit, and evaluate whether the required functions can be realized. This is a crucial point for whether a mobile APP can ultimately survive under the strategic direction of the enterprise. During the APP development process

Determine the prototype of the APP

Including user experience design (UX), the interaction logic of the APP interface, and the general status of the implementation of the APP function points

< p>Unique UI design

Have a clear positioning of the APP and build an APP prototype. Start UI design and design the user interface. The user interface is where APP users interact with your APP. It should be simple and beautiful. , the principle of convenience can bring a higher experience to users. A complete APP needs an idea that attracts users' attention, which requires developers to have unique insights in creative planning

Excellent sample display

The display effect of high-quality samples is In order to allow enterprises to visually see the prototype of an APP, this also saves a lot of time and energy in later code development.

Native code development

After UI design and sample presentation, the APP code development stage officially enters. At this stage, all early display effects are realized and developed natively through the APP code.

Deeply study what you don’t understand about APP development

The technology of APP development and customization is constantly being renovated and developed. APP developers will often encounter new problems during the development process. The functional requirements for APP development must not only be integrated with the existing functional system, but also make the newly developed APP functions unique.

Understand the system compatibility of APP

Under developmentWhen building a mobile APP, you must know that the styles, layouts, and navigation of Android and iOS are very different, which requires matching each operating system where the APP project is created to satisfy users. At the same time, for Apple apps, it requires applications designed and developed specifically for the operating system.

Developing mobile APPs requires continuous testing

Customized APPs need continuous optimization and testing, instead of getting the results after one or two APP production tests, directly putting the undeveloped and perfect The launch of APP software is irresponsible to the company and to users.

After the APP development is completed

Product testing is launched

After the code development is completed, it enters the stage of testing and later launch. This is a gradual process. After all bug testing is completed and it is confirmed that there are no bugs, it can be launched on the Apple market and Android market.

Project delivery is completed

After the APP development and testing is online, the source code, documentation, and operation documents will be delivered to Party A in accordance with the contract.

Online operation and promotion

After a successful launch, the APP can develop the number of users through the company's own operation and promotion, making it stand out in the industry. Of course, if there are bugs later, or updates can provide follow-up services. Only by constantly advancing with the times in operation and promotion, and maintaining and updating can the APP survive forever.

❸ Where can I find a more detailed explanation of blockchain applications

Blockchain applications include mathematical currency, payment and settlement, digital bills, proof of rights and interests, and bank credit reporting
Each The specific application is explained as follows:
1. Digital currency
At present, the most extensive and successful application of blockchain technology is the digital currency represented by Bitcoin. Digital currency has developed rapidly in recent years. Due to the characteristics of decentralized credit and frequent transactions, it has a high transaction circulation value and can maintain a relatively stable price through the development of hedging financial derivatives as a quasi-super-sovereign currency. Digital currency has established digital currency transaction credit backed by sovereign currency. The greater the transaction volume and the more frequent transactions, the stronger the digital currency transaction credit foundation. Once the blockchain credit system is implemented globally, digital currency will become a gold-like global payment credit.
2. Payment and settlement
At this stage, settlement and payment of commercial trade transactions all rely on banks. This traditional method of conducting transactions through intermediaries requires the account opening bank, counterparty bank, central bank, and overseas bank. In this process, each institution has its own accounting system, needs to establish an agency relationship with each other, and needs a credit line; each transaction needs to be recorded in its own bank, and must also be cleared and reconciled with the counterparty, resulting in Transactions are slow and costly. Compared with the traditional payment system, blockchain payment is carried out directly by both parties to the transaction without involving intermediaries. Even if part of the network is paralyzed, it will not affect the operation of the entire system. If a set of universal distributed inter-bank financial transactions are built based on blockchain technology,Easy Agreement provides users with cross-border, real-time payment and clearing services in any currency, so cross-border payments will become convenient and low-cost.
Take cross-border exchange as an example. If I open an account in a small bank in my country and remit money to another small bank abroad, the transfer process under the traditional SWIFT system requires the following steps: First, I send money to the small bank to which I belong. Banks submit applications; second, small banks submit applications to large banks in the same country that have signed exchange terms; third, large banks wire transfers to overseas cooperative banks; fourth, cooperative banks remit funds to small overseas banks. Currently, the process takes anywhere from 10 minutes to two days, depending on the country. If you use blockchain-based settlement technology and place an order at a market maker while remitting RMB, a trading bank participating in the system in the world will receive the order, and the two parties will shake hands to complete the exchange. The average payment confirmation speed will be in a few seconds. Within seconds.
3. Digital bills
Digital bills are a brand-new bill presentation form developed by combining blockchain technology with bill attributes, regulations, and markets. It is completely consistent with the technical architecture of the existing electronic bill system. different. The core advantages of digital bills are mainly reflected in: First, the disintermediation of the value transfer of bills. In traditional bill transactions, bill intermediaries often use information differences to match. After point-to-point transactions are realized with the help of blockchain, bill intermediaries will lose their intermediary functions and reposition their identities. The second is to effectively prevent bill market risks. Due to the blockchain's non-tamperable timestamps and the fact that it is open to the entire network, once a transaction is made, there will be no default, thus avoiding the problems of "one ticket selling more" for paper tickets and the out-of-sync payment and endorsement of electronic tickets. Third, the system construction and data storage do not require a central server, eliminating the development costs of central applications and access systems, reducing the maintenance and optimization costs of the system under the traditional model, and reducing the risks caused by system centralization. The fourth is to standardize market order and reduce regulatory costs. The non-tamperable timestamp formed by the continuous connection of blockchain data greatly reduces the cost of regulatory review. The completely transparent data management system provides a trustworthy traceability path, and shared constraints can be established in the chain for regulatory rules through programming. code to achieve full coverage and hard control of regulatory policies.
4. Proof of Rights and Interests
Every node participating in the maintenance of the blockchain can obtain a complete data record. Using the characteristics of the blockchain's reliability and collective maintenance, the rights of the owners of rights and interests can be confirmed. For the need to store permanent records, blockchain is an ideal solution and is suitable for scenarios such as land ownership and equity transactions. Among them, proof of equity is the field with the most applications currently. Equity owners can prove their ownership of the equity with their private keys. When the equity is transferred, it is transferred to the next owner through the blockchain system. The property rights are clear and the records are clear. The entire process does not require the involvement of a third party.
During a keynote address at the 2015 European Financial Journalism Awards for Excellence in Trading Technology in London, Nasdaq CEO Bob Greifeld announced that the exchange intends to use blockchain technology to manage its proxy voting system.system. Proxy voting is an important and time-consuming operation used by a listed exchange. The application of blockchain technology can allow shareholders to vote without having to attend the company's annual meeting. People can vote using their mobile phones, and Always keep voting records. Blockchain technology is regarded as an advanced technology in the field of equity trading that can ensure transparent transactions in a shorter time.
5. Bank Credit Reference
At present, when developing commercial bank credit business, whether it is for enterprises or individuals, the most basic consideration is the financial credit of the borrower itself. Each bank uploads the repayment status of each borrower to the central bank's credit reference center. When inquiries are needed, the bank will download the reference from the central bank's credit reference center with the customer's authorization. There are problems such as incomplete information, inaccurate data, low usage efficiency, and high usage costs. In this field, the advantage of blockchain is that it relies on program algorithms to automatically record massive information and store it on every computer in the blockchain network. The information is transparent, difficult to tamper with, and has low cost of use. Each commercial bank stores and shares the customer's credit status in its own institution in an encrypted form. When applying for a loan, the customer does not have to go to the central bank to apply for a credit check, that is, decentralization. The lending institution can retrieve the corresponding information data from the blockchain. Complete all credit reporting work.
In short, blockchain has become one of the hot spots of innovation in the financial industry. However, as a new technology, blockchain also has considerable risks. The current settlement system based on blockchain technology is very sensitive to regulatory risks. If participants are worried about the uncertainty of regulatory policies, it may cause the payment system to collapse due to instability. In addition, since its operating rights are controlled by developers, the obvious technical disadvantage is that if the operator itself controls more than 51% of the computing power of the entire network, it can achieve double payment, leading to a breakdown of trust. This is also an important issue that needs to be solved during the application process of blockchain technology.

❹ Which of the blockchain apps you have used is easier to use? Can you recommend a reliable one?

You can download the "Biting" APP, a software for live answering questions. They have it every day. Will share 12 questions, the questions inside are all blockchain-related knowledge. A must for beginners! I am also studying, so let’s work together~

❺ What are the blockchain apps?

Blockchain apps include: NetEase Planet Base, Shulian App, Lianxiang Finance, and Time Lin Blockchain Trading Platform, Blockchain Electronic Wallet, Ostrich Blockchain, GXS Wallet, Coin Wallet, and Youling Wallet.

5. Youling Wallet

Youling App creates a personal-centered value exchange network and ecology, and creates decentralized interactive entertainment and areas for all. Blockchain new economic platform.

Youling App adopts a decentralized open model, allowing individuals (third-party developers) to develop various applications based on the Youling open platform. Each user can freely choose applications to build their own homepage, including but Not limited to: souvenirs, live streaming, sharing, community, service sales, goods for sale.

❻ What are blockchain apps

There are many blockchain-related apps, such as exchanges, wallets, games, etc. Which aspect do you want to know about? A blockchain app alone does not provide much information. Related blockchain information can be found at Crypto Finance.

❼ What fields can blockchain be applied to?

The core of blockchain technology is to record data and contracts along the timeline, and can only be read and written, but cannot be modified. and delete. At the application level, the three major advantages of blockchain, including security, transparency, and efficiency, make it particularly helpful in standardizing the development of Internet finance and promoting the popularization and innovation of the Internet of Things and the sharing economy; in the capital market, the use of distributed databases and Smart contracts can also significantly reduce manual verification work and save costs for financial institutions. For example, blockchain in the financial field has the following six application scenarios and market segments: digital currency transfer, payment, and lending; cross-border payment and settlement; central bank issuance of digital currency; securities issuance and trading; supply chain or trade finance; reverse Money laundering and knowing your customers.

❽ What blockchain apps are there?

What blockchain apps are there? What you know are the following:

NetEase Planet

The blockchain APP launched by NetEase is one of the few blockchains that can be traded on a digital trading currency platform. Log in every day to receive force points. NetEase will also regularly release some additional tasks. You can also obtain force points by completing these tasks.

InsurWallet

Singapore’s insurance blockchain APP, this application is simpler than Laizgou and NetEase Planet. InsurWallet will mine every day and then generate corresponding Insur coins. At present, the new version has added a check-in function, which can increase the computing power. At the same time, inviting friends to participate can also increase the computing power.

Online Laici Dog

Laici Dog does not have an independent APP. It is directly embedded in the online wallet. If you want to play, you need to download the online wallet. . Each user can receive two Lai Chi dogs for free in the online wallet. At the same time, they can get micro points by logging in every day, and these points can be used to purchase Lai Chi dogs.

Gongxinbao Block City APP

This requires a mobile phone number and ID card. If you want to dig more mines, you also need to bind your Taobao account, Alipay, JD account, etc. It is really troublesome to use!

Of course there are many other blockchain APPs, which I won’t introduce here. You can search many of them online!

❾ What is blockchain mining and what does it do? A detailed introduction to blockchain and virtual currency

When Bitcoin was first released, people discovered that it was decentralized and not It is controlled by any center; it is completely open, except for the encryption of transaction information, the entire system information is highly transparent, and the technology is open source; security, as long as all nodes cannot be controlled%51, the data cannot be modified arbitrarily, which makes it relatively safe; independence, the entire model and Bitcoin do not rely on any third party, all nodes verify and exchange data within the system without any intervention

< p> Here we explain in detail what blockchain technology is. To put it bluntly, it is blockchain + chain. So what is a "block"? What is a "chain" again?

A block is a ledger. Transaction accounting is completed by multiple nodes distributed in different places, and each node records a complete account, so they can all participate in supervising the legality of the transaction, and at the same time Can jointly testify for it

Each block contains the cryptographic hash of the previous block, the corresponding timestamp, and the transaction data (usually a hash value calculated using the Merkle tree algorithm) represents), such a design makes the block content difficult to tamper with. The distributed ledgers connected by blockchain technology can effectively record transactions between two parties, and can permanently verify this transaction.

The function of the hash function h(): convert a string of any length into a fixed-length (for example, 256 bits) output. The output is also called a hash value. This output is irreversible

It is difficult to find two different x and y such that h(x) = h(y), that is, two different inputs, There will be different output. Theoretically, two different inputs may have different outputs, but this is almost impossible. For example, if an infinite space is mapped to a finite space, there must be a many-to-one situation. The theory exists, but there are no rules. It is guaranteed that you cannot find this result through any mathematical inference. Why is it 256 bits here? Isn't it longer? Because 256 bits are secure enough.

Split the ledger into blocks. For example, a piece of paper in a book is a block. Each block records transactions within a period of time, such as 10 minutes.

We divide Each piece of paper is likened to a block. A part of content is added to each block. We call it a block header, which records the hash value of the parent block. Each block stores the hash value of the parent block. , connect all blocks smoothly to form a blockchain

Record the hash value of block 1 to the block header of block 2. In this way, the block header of each block is recorded The hash value of the parent block, each block is linked in order, this is called a blockchain. The first block has no block header and is also called the genesis block

The blockchain is a ledger. Only when transactions occur in the ledger will the money in your account increase. If you need to make a transaction, you first need an account number and password. Just like your bank card has an account number and password, others can make a transfer to you. The account password on the block ledger is the public key and private key

Lao Wang (who already has a private key and a public key) wants to transfer 10 BTC to Zhang, which requires some operations

It is proved that Lao Wang himself issued the transfer signature function Sign (Lao Wang’s private key + Transfer information: Lao Wang transferred 10 BTC to Zhang San) = signature of this special account
The verification is that Lao Wang himself issued the transfer verification function Verify (Lao Wang’s address + Transfer details: Lao Wang transferred 10 BTC to Zhang San + Signature of this transfer) = true
Once the transfer is recorded in the block, no one can change it. Zhang San will increase it by 10 BTC, and Lao Wang will decrease it by 10 BTC accordingly. The entire operation is automatic, such as your wallet app It will help you do something like this. The app knows your private key, you tell the wallet the transaction content, the wallet signature is announced to the entire network, and it waits for others to verify the transaction

Centralized accounting efficiency It will be higher. Banks, governments or Alipay can help you keep accounts, which are very reliable, because they can't touch your money unless they have your private key

There are some shortcomings in centralized accounting

p>

In decentralization, everyone can keep accounts, and everyone can keep a complete ledger. Anyone can download open source programs, participate in Bitcoin's p2p network, monitor transactions sent from all over the world, become an accounting node, and participate in accounting. Suppose Xiaoyi releases a transaction and broadcasts it to the entire network, and accounting node A listens. When this transaction arrives, A verifies that the transaction bit is true and puts it into the transaction pool to continue spreading to other nodes. Because it is spread through the network, the transaction pools of different accounting nodes are not necessarily the same at the same time. Every 10 minutes, from all accounting nodes Among the nodes, select one according to a certain method. After verifying that the transaction of this node is true, then compare the transaction records in the transaction pool of this selected node with the transaction records in the transaction pool of your own (A) node. The comparison is completed. After that, the transactions recorded by the selected accounting nodes will be deleted from the own transaction pool, and the other accounting nodes will continue to record and wait for the next selection. There is a cycle every 10 minutes. During this 10 minutes, all accounting nodes will record accounts normally. , 10 minutes later, a node will be selected to use the transactions in its transaction pool as a new block. This block comes from the transaction pool of an accounting node I randomly selected among all the accounting nodes, and the cycle continues

A transaction is not completed when it is recorded. Only when the transaction becomes a certain block, the transaction is truly completed. This is a complete accounting process of decentralization. Your transaction will not be recorded immediately because the p2p network propagation takes time. If the node of the selected block has not received your transaction, the transaction will be not done. A block is generated every 10 minutes, but not all transactions within 10 minutes can be recorded. 10 minutes is just an average

The characteristics of decentralized accounting, the accounting authorityAccount node, the selected node will receive a 50BTC reward every ten minutes. Every 210,000 blocks in almost 4 years, the reward is halved. Bitcoin has been halved twice since its issuance, so a new block is generated every ten minutes. The reward for this accounting node is 10.5 BTC, which is halved every 4 years. Then the total amount of BTC can be calculated to be approximately 21 million. It is expected to be mined in 2040. Recording the reward of a block is also the only way to issue Bitcoin. When BTC is mined, the only income the accounting nodes can obtain is transaction fees

Accounting nodes compete for accounting rights through questions,

Find a certain random number Making the equation invalid
SHA256 hash function (random number + parent block hash value + transaction in the transaction pool) a certain specified value)
In addition to traversing the random number starting from 0 and trying your luck, there is no Other solutions, the process of solving the problem, are also called mining, so the accounting nodes that solve this problem are also called miners. The faster you traverse the random numbers, the greater the possibility that you will get the accounting right. This traversal Speed ​​is called computing power by mining bosses. In order to obtain this computing power, mining bosses will buy more mining machines with higher computing power

Whoever solves the problem correctly first will get the credit. Account rights. Accounting node A is the first to find the solution, which is announced to the entire network. After other nodes verify that it is correct, node A obtains the block, gains 12.5 BTC, and restarts a new round of calculation after the new block. This method is called (POW) allocating accounting rights

It usually takes about 10 minutes to solve this random number. 10 is not absolute, because the process of solving this problem is a process of luck. In response to changes in computing power in the future, Bitcoin will increase or decrease the difficulty every 2016 blocks, about two weeks, so that the average block generation time is ten minutes

Each block contains The encrypted hash of the previous block, the corresponding timestamp, and the transaction data (usually represented by a hash value calculated by the Merkle tree algorithm) are included. This design makes the block content difficult to tamper with. The distributed ledgers connected by blockchain technology can effectively record transactions between two parties, and can permanently verify this transaction.

Different from traditional stored data, each node of the blockchain stores complete data according to the block chain structure. Each node of the blockchain stores independently and has equal status. Relying on The consensus mechanism ensures storage consistency, while traditional distributed storage generally synchronizes data to other backup nodes through a central node.

Mahjong is a traditional Chinese blockchain project. A group of four miners work together. The miner who first collides with the correct hash value of 13 numbers can obtain the accounting rights and be rewarded.

Many people say that blockchain is a scam and Bitcoin is a scam. This may be a scam, but thisTechnology has been widely recognized and applied. Most people will not be able to understand the cryptographic knowledge involved in blockchain even if they lend their brains to you. The most important thing is to look at the problem from a relatively rational perspective. Don’t let the wind come to you.

There is something incredible about this technology. It maintains absolute order without a center or supervision. This is the trust that only needs to be established by everyone’s consensus. Bitcoin created this consensus. In the blockchain In the world everyone is fair and equal.