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How to become a blockchain developer?

Time : 15/03/2022 Author : kbv4qu Click : + -
        With the price of bitcoin hitting a new high, the blockchain technology behind it has also become a national strategy, and the relevant technology has once again let people focus. However, this time it is no longer the hype and application of "air currency" a few years ago, but it is more pragmatic and has enough precipitation. This time, the author translated a series of articles on blockgeeks, hoping to help you better learn and understand blockchain development. Link to the original text: how to become a blockchain developer blockgeeks. As the title shows, in this guide, we will show you how to become a blockchain developer. As you will soon see, blockchain development is not very different from conventional web development.
        In order to simplify your work, we have prepared this guide to help you learn about blockchain development and provide you with operating steps at the end of each part. The development scope of bitcoin blockchain is limited. However, with the emergence of Ethereum, the game has completely changed. Ethereum is the first programmable blockchain in the world. Developers around the world finally have the opportunity to build applications on the blockchain. This is why learning blockchain development has become such a popular skill. There is no doubt that we live in the "blockchain era". It may have a great impact on our future. So, how do you get a part of the "blockchain action"? If you want to become a blockchain developer, you need to take some steps.
        Hopefully, at the end of this guide, you will have the tools you need to start your journey. If you really want to be a developer, we need to set some expectations for you. First of all, it will take time. You will need to spend time and resources on Education (you can continue the blockchain development course by participating in our online course). Second, don't expect immediate results. Becoming a blockchain developer is not a panacea. It is recommended to learn more about these terms widely used in the field of encryption. We strongly recommend that you read our comprehensive glossary. It is important to learn these basic terms, otherwise you will further lose your studies.
        Now, next, it is time to conduct some self-education on the technical aspects of blockchain. If you are interested in the technical aspects of how to create fintech applications on the blockchain, you should definitely understand the context of cryptoeconomics. Most developers are usually proficient in the "encryption" part of the equation, but their knowledge of the "economics" part is extremely lacking. When you study some of these floating ICOS, this knowledge difference is very obvious. It is clear that the economic aspects of their ICO are not well considered. Therefore, in view of this, it may be a good idea to understand economics and have a general idea about it.
        If you want to get a general idea of cryptoeconomics, you can view our article here. After that, we strongly recommend that you understand how bitcoin works. Bitcoin is one of the most widely used and refined applications in blockchain technology. You can even call it the best example that pure blockchain technology can achieve, because of its impact. It is surprising how many emerging "developers" do not have any real-world first-hand experience in cryptocurrency. If you haven't even used the platform, how can you innovate and improve on the platform?. Go to coinbase or any other exchange you are familiar with or can use in your country to buy some coins.
        You don't need to create a broad portfolio right now. Just buy a few coins and see how the whole process works. These wallets are the easiest to use of all. Creation is very simple because it basically creates your own account on any exchange service. In addition, you can access this wallet from any server or any device in the world as long as it is connected to the network. Having said that, there is a big problem with online wallets. Your private key will be saved on another server. Basically, it's like giving a key to a hacker on a silver platter. Do not use online wallets to store large amounts of money. Minimum cost for storage exchange.
        When creating a broad product portfolio, you must learn how to save money with a cold wallet. You can learn how to do it here. Later, if you create an ICO, you must know how the wallet, especially the multi signature wallet, works. (before we continue, David Schwartz shouted loudly in the keynote speech on the use of C + + in blockchain software development at cppcon 2016.). As David & middot; As David Schwartz said, blockchain should be a fortress. First, the code is public and open to everyone.
        Anyone can view the code and check for errors and vulnerabilities. However, unlike other open code resources, the disadvantages of finding vulnerabilities in blockchain code are enormous. Any programmer can hack into and escape the potential millions of dollars. Due to these legitimate security issues, development on the blockchain is usually very slow. It is important to keep up with the network. You can't fall behind and keep up with all the network needs. You should have the ability to handle remote and local queries. Blockchain must always be implemented with its highest functions, but to do this, the language chosen must be very flexible. The problem is that some tasks in the blockchain can be parallelized, while some tasks cannot be completed in parallel.
        Digital signature verification is a good example of a parallelizable task. All that is needed for signature verification is the key, transaction and signature. With only three data, you can verify in parallel. However, not all functions on the blockchain should do that. Think of transaction execution itself. Multiple transactions cannot be executed in parallel; It must be completed once at a time to avoid mistakes such as repeated expenditure. Some languages are good at parallel operations, while others are good at non parallel operations. Therefore, in the development of blockchain, all transaction operations must be deterministic. Your transaction cannot occur in one way and then occur in another way the next day.
        Similarly, you cannot have a smart contract that can work in two different ways on two different machines. Some languages can meet most of these needs. If you are a blockchain developer, you must have some basic knowledge of C + + and JavaScript. Although C + + seems a little outdated, the fact is that it does well for all the functions we have described above. In fact, Satoshi Nakamoto wrote the bitcoin source code in C + +. Together with HTML and CSS, it is one of the three core technologies in the world wide web content production. JavaScript is often used to create highly interactive web pages.
        How do we make a square? What does a simple block consist of? In the simple cryptocurrency we will make (we call it "blockgeekscoin"), each block will have the following information:. OK, that's an obstacle. Therefore, in the first line of the code, we call it the crypto JS library, because the sha256 hash function is not available in JavaScript. Next, we call a constructor inside the class to call an object that will have certain values. What may catch your attention is the calculatehash () function. Let's see what it's doing.
        In a block, we get all the contents and hash them to obtain the hash of the specific block. We are using JSON The stringify function converts the data of the block into a string to hash it. The genesis block is the first block of the blockchain. The reason why it is so special is that although every blog points to its previous block, the genesis block does not point to anything. Therefore, once a new chain is created, the genesis block is called immediately. In addition, you can see a "creategenesisblock()" function, where we manually give the data of the block:. First, we will need to know the last block in the current blockchain.
        To do this, we use the getlatestblock () function. If the "previoushash" of the current block is not equal to the "hash" of the previous block, this function will return false, otherwise it will return true. We created a new cryptocurrency based on the blockchain and named it blockgeekscoin. By calling this new object, I activate the constructor, which in turn automatically creates the genesis block. According to Wikipedia, smart contracts are "computer protocols designed to facilitate, verify or enforce the negotiation or performance of contracts".
        Ethereum was created by American cryptographer Nick middot; Nick Szabo first proposed it in 1996, and Ethereum is generally considered to popularize the concept and make it mainstream. Anything running on the blockchain must be immutable and must have the ability to run across multiple nodes without compromising its integrity. Therefore, the smart contract function needs to have the following three points:. A program is deterministic if it provides the same output to a given input every time. For example. If 3 + 1 = 4, then 3 + 1 is always 4 (assuming the same cardinality). Therefore, when a program provides the same output to the same set of inputs in different computers, the program is called a deterministic program.
        In mathematical logic, we have an error called "stop problem". Basically, it indicates that it is impossible to know whether a given program can perform its functions within a certain time. In 1936, Alan Turing deduced from Cantor's diagonal problem that it was impossible to know whether a given program could be completed within the time limit. This is obviously a problem with smart contracts, because by definition, contracts must be able to terminate within a given period. Some measures have been taken to ensure that there is a way to "kill" the contract from the outside without falling into an endless cycle, thus wasting resources:. Turing incomplete blockchain will have limited functions and cannot jump and / or cycle.
        Therefore, they cannot enter the infinite cycle. The program can simply track the "number of steps" executed, that is, the number of instructions executed. Once a specific number of steps are executed, it can be terminated. Another method is the meter. Here, the contract is executed through advance payment. The execution of each instruction requires a certain cost. If the expenses incurred exceed the advance payment, the contract shall be terminated. In the blockchain, anyone and everyone can upload smart contracts. However, therefore, the contract may contain viruses and errors both intentionally and unintentionally. If the contract is not isolated, it may hinder the whole system. Therefore, it is essential to isolate the contract in a sandbox to protect the entire ecosystem from any negative impact.
        Now that we have seen these functions, it is important to understand how they are executed. In general, smart contracts are run using one of the following two systems:. Let's compare the two and determine which constitutes the better ecosystem. For simplicity, we will compare Ethereum (virtual machine) and fabric (docker). For anyone who wants to learn how to make DAPP (decentralized application) or enter ICO games, it is absolutely necessary to learn solidity. We have a detailed guide that you can read here. However, here we will provide you with a basic overview.
        Solidity was developed by gavinwood, Christian reitwiessner, Alex beregszaszi, hiichi Hirai and several former Ethereum core contributors. It can write smart contracts on blockchain platforms such as Ethereum. Solidity is a purposely compact, loosely typed language with syntax very similar to ECMAScript (JavaScript). There are some important points to remember in the basic principles document of Ethereum design, that is, we are developing a stack and memory model with a 32 byte instruction word length. EVM (Ethereum virtual machine) enables us to access the program "stack", just like a register space. We can also paste the memory address in it to make the program counter cycle / jump (for sequential program control), Scalable temporary "memory" and more permanent "storage", which has actually been written into the permanent blockchain. Most importantly, EVM needs to be fully determined in the smart contract.
        Participate in reddit forums, GitHub pages and stackexchange, and contact other developers, and follow any news about the technology at any time. In addition, it will help you understand people's needs among blockchain developers. What qualities will the company look for when recruiting? You can find this information here. Therefore, this is a difficult road map for you and your journey to become a blockchain developer. Of course, this is not enough. You will need to show your initiative and always participate.
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