go语言 区块链,go语言区块链应用开发从入门到精通

随着区块链技术的发展，Go语言作为一种高级编程语言，已经成为区块链应用开发的首选语言。Go语言开发的区块链应用可以更好地支持分布式系统，并且具有更高的安全性和可靠性。因此，学习Go语言区块链应用开发已经成为许多开发者的必修课程。

Go语言区块链应用开发从入门到精通，不仅需要学习Go语言的基本语法，还需要了解区块链的原理和编程技巧。首先，学习者需要学习Go语言的基本语法，包括变量、循环、函数等。其次，学习者需要了解区块链的基本原理，比如分布式账本、共识机制、加密算法等。最后，学习者需要学习Go语言在区块链开发中的应用，比如智能合约、节点开发、网络安全等。

Go语言区块链应用开发的入门实践，可以从简单的Hello World开始，学习者可以使用Go语言编写一个简单的区块链应用，让它能够运行起来。接下来，学习者可以深入学习Go语言，完成一个更复杂的区块链应用，比如支付系统、投票系统等。最后，学习者可以学习更多的Go语言技术，比如智能合约开发、节点开发、网络安全等，从而完成一个完整的区块链应用。

Go语言区块链应用开发从入门到精通，不仅需要学习Go语言的基本语法，还需要了解区块链的原理和编程技巧，还要了解Go语言在区块链开发中的应用。学习Go语言区块链应用开发，不仅可以提高开发者的技术水平，还可以增强开发者的创新能力，为区块链行业的发展做出贡献。

❶ What are the better forums or apps for sharing and learning blockchain technology tutorials

There are not a few people learning blockchain technology now, but like blockchain training There are not many institutions. There are many blockchain communities and blockchain platforms on the Internet, such as Babbitt, Zhiquchain, Golden Finance, and other platforms, which contain information, knowledge and experience, videos, blockchain project cases, etc. in the blockchain industry. Personally, I think You can buy some blockchain books and combine them with some of the above-mentioned blockchain platforms to learn, summarize experience, and practice. After a period of time, you will have a new understanding of blockchain technology.

❷ Getting started with blockchain technology, what programming languages ​​are involved

Go language is the mainstream language for blockchain
According to the BOSS Research Institute data survey, currently recruiting Blockchain jobs
The mainstream languages ​​​​are Go and C++. Early blockchain systems and applications
programs were mainly implemented in C++. Now most companies use Go language to
build Public chain system.
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.

❸ What are the courses on blockchain technology architecture?

Currently, there are a wide range of blockchain training courses on the market, and the course content and teaching formats are also diverse.

Blockchain

1. Introduction to programming basics

Computer software and hardware basics, character sets and character encoding, HTML+CSS (including HTML5+CSS3), ECMA + BOM + DOM, jQuery, node.js, Ajax and Express

2. Go programming language

Go basic syntax, process control, functions and Data, error handling, Go object-oriented programming, Go concurrent programming, Go network programming, Go security programming, Go advanced programming (goroutine, channel), database MySQL, LevelDB

3. Blockchain 1.0 - Bitcoin

Bitcoin principles, Bitcoin system architecture, cryptographic algorithms (implemented in Go language), consensus algorithms (implemented in Go language), Bitcoin transaction principles and transaction scripts, Bitcoin RPC programming (implemented in node.js) , Bitcoin source code analysis

4. Blockchain 2.0 - Ethereum

The working principle and infrastructure of Ethereum, the basic concepts of Ethereum (account, transaction, Gas), Ethereum wallet Mist and Metamask, Ethereum transactions, ERC20 standard Token development and deployment, Ethereum development IDE - remix-ide, smart contracts and Solidity, Solidity deployment, backup and calling, framework technology: truffle and web3, DApp development practice, Geth

5. Blockchain 3.0 - Fabric of Hyperledger

Hyperledger project introduction, Fabric deployment and use, Fabric configuration management, Fabric architecture design, Fabric CA application and configuration , application development practice.

The Xueshuo Innovation Blockchain Technology Workstation under Lianqiao Education Online is the only "blockchain technology" approved by the "Smart Learning Workshop 2020- Xueshuo Innovation Workstation" carried out by the School Planning and Construction Development Center of the Ministry of Education of China. Professional” pilot workstation. The professional base is based on providing students with diversified growth paths, promoting the reform of the training model integrating professional degree research, production, and research, and building an applied and compound talent training system.

❹ Learn it as soon as possible and teach you step by step how to call smart contracts using Go language

Smart contract calling is the key to realizing a DApp. A complete DApp includes front-end, back-end, smart Contracts and blockchain systems, the call of smart contracts is the key to connecting the blockchain with the front and back ends.

Let’s first understand the basic principles of smart contract calls. Smart contracts run in the EVM of the Ethereum node. Therefore, in order to call the contract, you must visit a certain node.

Taking the back-end program as an example, if the back-end service wants to connect to the node, there are two possibilities. One is that both parties are on the same host. In this case, the back-end connection node can use local IPC (Inter-Process Communication, Inter-process communication) mechanism, you can also use the RPC (Remote Procere Call, remote procedure call) mechanism; another situation is that the two parties are not on the same host, in this case only the RPC mechanism can be used for communication.

Speaking of RPC, readers should have some impression of the Geth startup parameters. When Geth starts, you can choose to enable the RPC service, and the corresponding default service port is 8545. .

Next, let’s take a look at the process of smart contract operation.

The running process of a smart contract is that the back-end service connects to a node and sends the call (transaction) of the smart contract to the node. After the node verifies the legality of the transaction, it broadcasts it to the entire network and is packaged by the miners. Entering the block means that the transaction has been confirmed, and the transaction is not completed until then.

Just like databases, each blockchain platform will provide SDK (Software Development Kit) for mainstream development languages. Since Geth itself is written in Go language, if you want Use Go language to connect nodes, send transactions, and directly import the go-ethereum (Geth source code) package into the project. The remaining issues are the process and API.

To summarize, the two key points for smart contracts to be called are nodes and SDK.

Since IPC requires that the backend and the node must be on the same host, developers often use the RPC mode. In addition to RPC, Ethereum also provides developers with the json-rpc interface, which will not be discussed in this article.

Next, we will introduce how to use the Go language and use the go-ethereum source code library to implement smart contract calls. There are fixed steps. Let’s talk about the overall steps first, taking the following contract as an example.

Step 01: Compile the contract and obtain the contract ABI (Application Binary Interface). Click the [ABI] button to copy the contract ABI information and paste it into the file calldemo.abi (you can use the Go language IDE to create this file, the file name can be customized, and it is best to use abi as the suffix).

It is best to save calldemo.abi in a separate directory. Enter the "ls" command to only see the calldemo.abi file. The reference effect is as follows:

Step 02 :Get the contract address. Note that the contract must be deployed to the Geth node. Therefore Environment is selected as Web3 Provider.

In【Environment] Select "Web3 Provider" in the option box, and then click the [Deploy] button.

After deployment, the contract address obtained is:.

Step 03: Use the abigen tool (executable program in the Geth toolkit) to compile the smart contract into Go code. The abigen tool is used to convert abi files into Go code. The command is as follows:

The meaning of each parameter is as follows. (1)abi: specifies the incoming abi file. (2) type: specifies the basic structure type in the output file. (3)pkg: Specify the output file package name. (4)out: Specify the output file name. After execution, you will see the funcdemo.go file in the code directory. Readers can open the file and enjoy it, but be careful not to modify it.

Step 04: Create main.go and fill in the following code. Note that the HexToAddress function in the code needs to pass in the address after the contract is deployed. This address is obtained in step 01.

Step 04: Set up go mod so that the project can be automatically recognized.

As mentioned earlier, if you want to use Go language to call smart contracts, you need to download the go-ethereum project. You can use the following command:

This command will automatically convert go -ethereum downloaded to "$GOPATH/src/github.com/ethereum/go-ethereum", which is not bad. However, since version 1.11, the Go language has added a mole mode to manage projects. As long as go mod is set up, you don't need to worry about downloading dependent projects.

Next, set mole to take effect and GOPROXY, the command is as follows:

In the project project, perform initialization, calldemo can customize the name.

Step 05: Run the code. Execute the code and you will see the following effect, as well as the final output of 2020.

In the above output information, you can see that the Go language will automatically download dependency files. This is the magic of go mod. After seeing 2020, I believe readers also know that the running results are correct.

❺ How to develop blockchain How to develop blockchain

Go is an open source programming language that allows simple construction andReliable and efficient software made easy. If you want to learn this programming language, you must first find a good tutorial. Brothers in Arms Go Language + Blockchain Training has recently released a new set of Go language tutorials, and the teacher’s lectures are very good!

As the concept of "blockchain" is being discussed globally, related blockchain technology applications have quietly been added to daily life scenarios such as finance, logistics, credit reporting, manufacturing, and retail. Some experts said that in the future, blockchain will be closely related to people's lives, and the integration of blockchain technology into people's daily lives is the general trend.

The popularity of the blockchain market has triggered a large demand for talents based on blockchain technical personnel, and the popularity of blockchain talents is rising at light speed. According to the "2018 Blockchain High Salary List" released by Lagou.com, domestic corporate giants such as Tencent, Xiaomi, Suning, and JD.com have released numerous high-paying blockchain job requirements in an effort to explore blockchain-related technologies and applications. The list also points out that high-paying positions are mainly in demand for blockchain-related technical positions, among which Suning and Keda have given the highest monthly salary of 100k.

The huge market demand for technical talents will inevitably drive the explosive emergence and growth of the entire blockchain training market. Most training models can be divided into online training, traditional IT institution training and high-end offline short-term training camps. However, the market is also full of various blockchain training chaos during the hot evolution: the instructor qualifications are watered down. , Even the most basic names are not disclosed, the course syllabus is opaque, the teaching quality has shrunk, the class schedule is unreasonable, and the training fee standards are uneven, etc.

With the large-scale development of the entire blockchain training market, Brothers Education has joined hands with senior blockchain expert Yin Cheng and his Tsinghua Shuimu Weiming team to establish the Blockchain Academy, leveraging its professional and powerful technology The team of lecturers, detailed and comprehensive curriculum system, and massive actual enterprise blockchain projects are designed to deepen the field of blockchain education and training and cultivate more professional technical talents for enterprises and society.

Yin Cheng, a senior blockchain technology expert and the dean of Brotherhood Blockchain Academy, graduated from Tsinghua University. He has served as a Google algorithm engineer, the world's most valuable expert in the Microsoft blockchain field, and a Microsoft Tech.Ed conference Gold medal lecturer. Proficient in C/C++, Python, Go language, Sicikit-Learn and TensorFlow. With 15 years of programming experience and 5 years of teaching experience, he is a senior software architect, Intel software technology expert, a famous technical expert, and has many years of working experience in the world's top IT companies, Microsoft and Google. He has many years of experience in software programming and teaching as a lecturer, and has developed many products in human-computer interaction, education, information security, advertising, and blockchain systems. He has profound project management experience and R&D experience, holds two artificial intelligence invention patents, and develops electronic currency to be deployed on Microsoft Windows.Practical experience with Azure. The teaching explanations are simple and profound, so that students can apply what they have learned.
The first phase: blockchain industry and Go programming for 5 weeks
The second phase: cryptography and consensus algorithm for 2 weeks
The third phase: Ethereum source code analysis and development for 3 weeks
/>Phase 4: Hyperledger and Node.js 2 weeks
Phase 5: Bitcoin & EOS 4 weeks
Phase 6: Comprehensive project practice

❻ How to learn Blockchain technology

Recently there has been an endless stream of news about various digital currencies. Bitcoin is the most familiar one to everyone, and it has been a hot topic a long time ago. There are many people who make a lot of money from this. Of course, different countries have different recognitions of Bitcoin, but no matter what the future trend of Bitcoin is. Knowledgeable people should see more than just digital currencies such as Bitcoin, because these are temporary hot spots after all, and it is still a matter of speculation as to which currency will make it to the end.
Bitcoin is just an application product brought about by new technological innovation, and what really changes future technology is not the digital currency, but the blockchain technology behind it. Recently, whenever blockchain technology is mentioned, it will become a hot topic. However, as everyone knows, some well-known Internet companies such as Internet, Tencent, Xiaomi, and Xunlei have been unconsciously conducting research in the field of blockchain for a long time.
While ordinary netizens are still obsessed with hyping various virtual currencies, smart people have already begun research and study on blockchain technology. Of course, since it is a new technology, not many people know how to show it, and even fewer people study it in depth. But in any case, blockchain technology has deeply entered the research scope of various large companies. As more powerful companies invest in research in this area, the demand for blockchain technology talents will increase.
Things are rare and valuable, but the same is true for people. When the market demand for blockchain technology becomes greater and greater, and even when new product applications created by blockchain technology appear in the future, the demand for blockchain talents in the entire Internet community will far exceed that of iOS back then. The scene in heat. Of course, for those who understand blockchain technology, the objective salary will also become the envy of other technical professionals.
Go language is the second open source programming language released by Google in 2009.
The Go language is specially optimized for programming multi-processor system applications. Programs compiled using Go can be as fast as C or C++ code, are more secure, and support parallel processes. Not only can you develop the web, but you can also develop the underlying layer. Currently, Zhihu is developed using golang. The preferred language for blockchain is go, Ethereum, and Hyperledger are all based on go language, as well as the go language version of btcd.
The goal of Go is to improve the dependency of existing programming languages ​​on libraries and other programs. ofManagement, these software elements are called repeatedly by applications. This language is also designed to solve multi-processor tasks due to the existence of parallel programming models.
Google has high hopes for Go. Its design is to allow the software to take full advantage of the simultaneous multitasking of multi-core processors and to solve the troubles of object-oriented programming. It has modern programming language features, such as garbage collection, to help programmers deal with trivial but important memory management issues. Go is also very fast, almost as fast as C or C++ programs, and can quickly create programs.
Go's website was built using Go, but Google has greater ambitions. The software is specifically designed for building server software (such as Google's Gmail). Google believes that Go can also be applied to other areas, including executing software within the browser and replacing the role of JavaScript.

❼ What can the go language do

1. Server programming: If you used C or C++ to do those things in the past, it is very suitable to use Go to do them, such as processing logs and data packaging. , virtual machine processing, file system, etc.

2. Distributed systems, database agents, middleware: such as Etcd.

3. Network programming: This area is currently the most widely used, including Web applications, API applications, download applications, and Go’s built-in net/http package basically implements all the network functions we usually use. .

4. Development of cloud platforms: Currently, many foreign cloud platforms are developed using Go. The well-known Qiniu Cloud, Huawei Cloud, etc. have products developed using Go and are open source.

5. Blockchain: There is currently a saying that technical practitioners call Go language the development language of the blockchain industry. If you study blockchain technology, you will find that many blockchain systems and applications are developed using Go. For example, ehtereum is currently the most well-known public chain, and fabric is currently the most well-known. Alliance chains, both have go language versions, and go-ehtereum is also the officially recommended version of Ethereum.

Many later projects were re-implemented natively using the Go language. This process was simpler than other languages, which also contributed to the emergence of a large number of native development projects using the Go language. .