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⑴ How much does it cost to develop a blockchain application?

"The development cost of a blockchain application app is estimated based on the functional complexity of the app. According to the startup The estimated development cost of Technology is between hundreds of thousands to hundreds of thousands. Generally speaking, the development time of apps with complex functions will be longer and the cost will be higher. Apps with simple functions will be faster than Bohuzheng. , the cost will be lower. Development costs mainly include labor costs and hardware consumption. Apps with more complex functions will take longer, and the corresponding costs will be higher. For example, if there is ready-made source code that can meet the functional requirements, Then you can quickly realize development by modifying and adding functions, so that the price is very low."

⑵ Professional development of mining machine mining system model | Blockchain DAPP mining model development

Mining machine mining system software development and construction, mining machine mining system software development cases, mining machine mining system source code development, mining machine mining system APP development requirements, mining machine mining software system development cases, mining machine Mining customization system development, mining machine mining system software development, all data in the block training are connected back and forth to form a time node that cannot be tampered with, so that all events that occur on the block can be labeled with a set of irreversible Forged real records, the decentralization of blockchain technology can solve the problem of data tracking and information anti-counterfeiting

1. What is the blockchain mining/mining system?

The blockchain mining system mainly adopts the new gameplay of "entertainment and mining" to empower entertainment and break the traditional game/game business model. Users can generate "computing power" by playing games on the platform, thereby realizing "mining". The mined minerals can be used to purchase in-game tools or can also be traded on the exchange. /Blockchain assets/asset exchange/exchange.

2. What are the types of blockchain mining?

1. Main chain mining/mining system:

Committed to main chain and alliances chain and private chain construction. Build a commercial/industrial main chain system based on distributed deployment, various smart contracts, consensus mechanisms, strong scalability, and high TPS performance

2. Money/package mining/mining system:

Blockchain money/package mining/mining system development supports multi-chain, multi-currency, multi-language, and multi-mode. The private key is self-sustained, the only mnemonic phrase, safe and worry-free! Supports various DAPPs built into the wallet/wallet, holding/coin generation/interest, resonance mode, distribution/marketing economy and other modes

3. Trading system:

Supports various trading forms such as currency trading, OTC trading, contract trading, leverage trading, etc. Professional, multi-dimensional security system, market value management system, early/warning system and multiple financial/financial management systems. Support PC, iOS, Android and moreBoth terminals log in at the same time.

4. Blockchain browser:

is the main window for browsing blockchain information. The content recorded in each block can be viewed from the blockchain browser. Check it out. It is convenient for digital asset users to use the blockchain browser to query the transaction information recorded in the block. The information is open and transparent on the entire network

5. DAPP mining/mining system:

Combination Industry-specific needs, customized development of decentralized applications. Scheme design, token model design, ecological role design and Token circulation design, etc. Including blockchain mall, virtual mining/mining, public welfare and other industry-type applications

6. Mining/mining system:

Physical mining/mining services provide machine purchase , resale, buyback, transportation, repair services. Connect with compliant mines, mining pools, electricity and other resources at home and abroad. There is no limit on the number of mining machines. Funds can come in and out as you go, and mining income will be settled on a daily basis

7. Virtual mining/ Mining services:

Provide customized virtual mining/mining system development, supporting centralized services and decentralized services.

8. Industry solutions:

Customize blockchain solutions according to the industry and in line with the current situation of the enterprise. These include supply chain finance, content copyright, e-commerce points, cross-border payment, universal traceability and various industries to create a value ecosystem for all your ideas and needs for the sustainable development of enterprises.

2. How to use the blockchain mining APP?

The blockchain mining models currently on the market are ever-changing, presenting a variety of mining models. The blockchain mining system I will introduce today is a mainstream In mining mode, merchants can customize the gameplay on this basis.

For example, on the blockchain mining machine APP platform, users can become miners by registering as members, and miners can earn income through various mining activities, such as purchasing a dedicated mining equipment. You can start mining, and for example: mining when you buy it, mining when you trade, mining when you sign in, mining when you evaluate, mining when you buy a mining machine, mining when you invite people, etc. In other words, any task operation performed by users on the blockchain platform can be regarded as mining behavior.

Every mining behavior of users is contributing value to the platform, and the platform should reward them with coins. The mines mined by users can be circulated in the merchant's own ecosystem. For example, they can be used for financial transactions such as buying and selling on the platform, and can also be used for purchase deductions, cash withdrawals, etc.

⑶ Which platform is better for blockchain system development

Lupda Network Technology focuses on blockchain system development. Blockchain technology is an emerging technology today, but so It’s not appropriate to say that, because ten years ago BitcoinThis technology was also born with the emergence of , but it is no problem to say that it is a very hot technology at the moment. After 10 years of continuous updates, blockchain technology has finally seen relevant applications in the past two years, and has entered the blockchain 3.0 era. In the next 3-5 years, I believe there will be more fields that require blockchain Chain system to support. Below, the editor of blockchain system development loopodo will take you to take a look at several core technologies for blockchain system development.
1. Hash algorithm
Hash algorithm is the most commonly used algorithm in the development of blockchain systems. Hash function is also called hash function or hash function. The hash function can convert data of any length into a set of fixed-length codes through the Hash algorithm. The principle is based on a cryptographic one-way hash function. This function is easy to verify, but difficult to crack. Usually, the industry uses y =h (x) to represent it. This hash function implements operations on x to calculate a hash value y.
2. Asymmetric encryption algorithm
Asymmetric encryption algorithm is a secret key method. Asymmetric encryption algorithm requires two keys: public key and private key. . The public key and the private key are a pair. If the public key is used to encrypt data, it can only be decrypted with the corresponding private key. Because encryption and decryption use two different keys, this algorithm is called an asymmetric encryption algorithm
3. Consensus Mechanism
The so-called "consensus mechanism" is through the voting of special nodes. The verification and confirmation of the transaction can be completed in a very short time; for a transaction, if several nodes with unrelated interests can reach a consensus, we can think that the entire network can also reach a consensus on it.
Today’s blockchain consensus mechanisms can be divided into four major categories: Proof of Work (PoW), Proof of Stake (PoS), Delegated Proof of Shares (DPoS) and Pool verification pool.
4. Smart Contract
A smart contract is a digital, networked version of a traditional contract. They are computer programs that run on the blockchain and can execute themselves when conditions written in the source code are met. Once a smart contract is written, it can be trusted by users and the terms of the contract will not be changed. Therefore, the contract is immutable and cannot be modified by anyone.
Developers write code for smart contracts, which are used for transactions and any exchange between two or more parties. The code will contain some conditions that trigger automatic execution of the contract. Once written, the smart contract is automatically uploaded to the network. Once the data is uploaded to all devices, users can come to agreement with the results of executing the program code.
5. Distributed Storage
Distributed storage uses the disk space on each machine in the enterprise through the network, and combines these scattered storage resources into a virtual storage device, and the data is divided intoScattered storage exists in every corner of the enterprise. Massive data is divided according to the degree of structure, and can be roughly divided into structured data, unstructured data, and semi-structured data.

⑷ Does the code of blockchain projects need to be sourced? Why

Blockchain is a consensus mechanism, which means that such participants must be transparent, that is, The code that runs this way must be open source code. The so-called open source code means that the code is all visible.

Everyone can compile and execute the program they compiled, which also means that everyone can modify the code and run it. Under the current mechanism, it can be done no matter how the code is modified, as long as those who modify the code If people do not exceed 51%, then this kind of modification is meaningless and will instead waste your own computing power.

So, at least the people involved must know the code. If the code of a blockchain project is not open source, then the nodes running its program will be opaque, which is equivalent to you putting His agent is installed on his own node and will execute orders on behalf of this owner. It is equivalent to system developers controlling the entire network. How is this kind of blockchain possible?

From a conceptual perspective, if the blockchain project is compared to a machine, its working mechanism is transparent and it is a trustworthy machine. This is how we understand this. First, open source is a must for blockchain projects, not an option. Both public chains and alliance projects need to be open source. Second, open source and delivering source code are two different things. Different concepts, delivering source code is not an open, transparent, and joint process for everyone to participate.

For example, in Ethereum, a certain platform currency running on its platform once had a vulnerability and needed to be modified. This modification was directly reflected in the code. In the process of reading the code , I found that the relevant code of the currency appears in many places, which is used to deal with how the node should deal with this problem once it encounters this problem. These processing methods are all written in open source code and everyone can read it. If the person in charge of the node If he approves this solution, he will run this program, which is equivalent to supporting the decision of this code. In fact, the blockchain is implemented through this mechanism.

⑸ How to use code to implement a simple blockchain

Go directly to the source code

⑹ Getting started with blockchain technology, what are the programming languages ​​involved?

Go language is the mainstream language of blockchain
According to the BOSS Research Institute data survey, the blockchain positions currently being recruited
The mainstream languages ​​​​are Go and C++. In the early days, Blockchain systems and applications
Programs are mainly implemented in C++, and most companies now use Go language to
build public chain systems.
C++ is suitable for the development of local programs.
Go language is suitable for the development of network programs and local programs.
Advantages compared to C++Go:
Garbage collection
Clear semantics
Uniform format

Disadvantages:
Efficiency is currently not as high as C++ , but for desktop programs, efficiency is not a big problem because the hardware is already very fast.

C++ is currently the mainstream language and I believe it will become a classic like C.
The meaning of becoming a classic is that people who learn it can get a good salary, but it is only a good salary.
In the future network world, Go has a great chance of becoming popular, and I think its future is promising.

The developers of Go include the founder of Unix and the founder of C language. They are the first generation of hackers and I believe they will do a good job.

Now the go full-stack + blockchain market is experiencing an unprecedented boom, and the situation is gratifying.

⑺ What are the tutorials on blockchain technology?

The current underlying technology platforms of blockchain include Bitcoin blockchain, Ethereum, Hyperledger, Corda, and Chain wait. Dark Horse Programmers is about to open a related course in Shenzhen. I heard that this course has been developed for more than two years and is very valuable