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A Complete Guide to Blockchain Development
As such, economics is essential to understanding cryptocurrencies. The most important branch of economics that plays into cryptocurrencies is game theory , the study of payoffs and incentives among multiple agents. Two key concepts in your repertoire should be Nash equilibria and Schelling points , as they feature prominently in cryptoeconomic analysis.
Cryptocurrencies are not just protocols, they are also forms of money. As such, they respond to the laws of macroeconomics if they can be called laws. Cryptocurrencies are subject to different monetary policies , and respond predictably to inflation and deflation. You should understand these processes and the effects they have on spending, saving, etc.
Another valuable economic concept is the velocity of money , especially as it corresponds to valuing a currency. Cryptocurrencies are also deeply interwoven with markets, which requires an understanding of microeconomics.
For many coin distributions and cryptoeconomic systems, auction theory features prominently. If you are, feel free to skim or skip over them entirely. In October of , Satoshi Nakamoto published a white paper in which he described a protocol for a decentralized digital currency. He called this protocol Bitcoin. First, I recommend building your intuitions about proof-of-work and the fork choice rule also known as Nakamoto consensus. Start here:. Here are some good resources. Source and slides here.
There are also other blockchain implementations you can find, written in various programming languages. You should also by now have enough background that you should be able to read and understand the original Bitcoin whitepaper. To understand the economics and mechanics of Bitcoin mining, I recommend watching the lecture on Bitcoin mining in the Bitcoin and Cryptocurrencies Princeton course. You should also be able to play around with a Bitcoin block explorer and navigate raw Bitcoin transactions.
Now is a good time to study up on the history of Bitcoin and cryptocurrencies. The below video, offered by a UC Berkeley Decal, gives a good overview. You understand how blockchains and proof-of-work can achieve distributed, Byzantine fault-tolerant consensus within a peer-to-peer network.
But a payments network is just one application you can run atop such a blockchain. In , Vitalik Buterin, the creator of Ethereum asked: what if you used a blockchain to implement a decentralized computer? In Ethereum, you pay miners to execute your programs on this distributed virtual machine. This means you can perform arbitrary computations, using a Turing-complete programming language unlike Bitcoin script.
This brings us to smart contracts — the name for programs that run on such a virtual machine. In other words, you can create financial contracts that automatically enforce themselves. Ethereum has enabled the wave of ICOs and developers building atop the blockchain. It is the second largest cryptocurrency behind Bitcoin, it has more than 10x the developers of the next most popular platform, it has the strongest developer team, the most mature tooling, and the majority of ICOs and projects atop it.
It also has the most industry support , which goes a long way. The ideas behind Ethereum have also spawned a wave of innovation in cryptoeconomics. You should dip your toes into the ideas around DAOs , and all of the sci-fi fever dreams that they hint at. As with any technology, the best way to get acquainted with Ethereum is by building a few small projects. The dominant programming language for Ethereum is Solidity, which is a statically typed JavaScript-esque language.
To get your first exposure to Solidity development, I recommend working through all of the CryptoZombies tutorial. I recommend this guide as a first tutorial to walk you through the process. This tutorial does a good job of walking you through an end-to-end blockchain stack and explaining the pieces as they go along. Karl Floersch has a great tutorial where he walks through how to build a secure commit-reveal voting system.
Great, now for your mid-term exam: build a secure coin toss game, where two players can securely bet on the coin flip. No tutorial this time, do it on your own. Think about possible attacks — how can the players cheat? Can you ensure that they play honestly? Here are some hints. Security is absolutely essential to blockchain development.
Smart contracts have been plagued by disastrous hacks, including the DAO hack , the Parity Wallet hack , and the affectionately named Parity Wallet hack 2 now with its own T-shirt.
The truth is, smart contracts are extremely hard to get right. Though the programming toolchain will improve to make these exact attacks harder, they were ultimately all due to programmer error. There are also many subtler bugs that arise from smart contract programming, such as in frontrunning or secure generation of randomness. As a smart contract developer, you must treat security as paramount. That means any code that handles significant flows of money should be run through static analyzers like Oyente or Securify , tested thoroughly, and then audited by an experienced smart contract auditor.
To strengthen your security chops, I recommend working through The Ethernaut by OpenZeppelin, a game where you find and attack vulnerabilities in smart contracts. Many of them have you replicate real attacks against smart contracts that have occurred in the wild.
Phil Daian also has an excellent set of smart contract hacking challenges called Hack This Contract. Expect to revisit this document many times over in your smart contract programming career. The bibliography is also worth exploring for further reading by security experts.
Most developers recommend VSCode or Atom for your text editor, since they have decent Solidity plugins. Now is a good time to look into IPFS , which you can use as a fully decentralized filestore at much cheaper cost than the Ethereum blockchain.
Once you have your full Web3 stack set up, try deploying an end-to-end Dapp decentralized application. So when a program gives the same output to the same set of inputs in different computers, the program is called deterministic. Basically, it states that there is an inability to know whether or not a given program can execute its function in a time limit. This is obviously a problem with smart contracts because, contracts by definition, must be capable of termination within a given time limit.
In a blockchain, anyone and everyone can upload a smart contract. However, because of this the contracts may, knowingly and unknowingly contain viruses and bugs. If the contract is not isolated, this may hamper the whole system. Hence, it is critical for a contract to be kept isolated in a sandbox to save the entire ecosystem from any negative effects. Now that we have seen these features, it is important to know how they are executed. Usually, smart contracts are run using one of the two systems:.
If you are interested in Ethereum development specifically then it is important that you learn solidity as well. We already have a detailed guide to it which you can read here. However, here we are going to give you a basic overview. Solidity was developed by Gavin Wood, Christian Reitwiessner, Alex Beregszaszi, Yoichi Hirai and several former Ethereum core contributors to enable writing smart contracts on blockchain platforms such as Ethereum.
If you are interested in learning solidity then you can check our in-depth class here. One of the most important things that you can do as a budding developer is to constantly stay in the mix. Go and join the Reddit forums, Gitbub pages, and StackExchange and connect with other developers and always be on the lookout for any news regarding the technology.
Along with that, it will be helpful for you to know what people look for in blockchain developers. What qualities are companies looking for when they are looking to hire? You can find that information here. This information can be very useful in fine-tuning your skills enough to appeal to the companies. So, this is a rough roadmap for you and your journey to becoming a blockchain developer.
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No credit card needed! Navigation Blockchain Ethereum Hash. Ameer Rosic. Back to Guides. Tweet 3. Share 7K. And now we are simply going to find the hash of these two values. Like what you read? Have a question? Ask our Community. Have questions? We have built an incredible community of blockchain enthusiasts from every corner of the industry.
If you have questions, we have answers! Ask community. A: Blockchain is, an immutable time-stamped series record of data that is distributed and managed by cluster of computers.
Job openings in the Blockchain industry has increased exponentially in the last several years. Get Started. Hungry for knowledge? Join Blockgeeks. Nice blog. We are also working in blockchain development. You are going to send email to. Move Comment. Contents Exit focus mode. Table of contents. Get started with blockchain development Learning Path 6 Modules. In this learning path, you will: Learn the foundations of blockchain and how blockchain technology works.
Gain an understanding of the tools to develop on the Ethereum blockchain. Create smart contracts and decentralized applications. Deploy to local and test Ethereum networks.
Prerequisites Previous experience with any programming language like C, Python, or JavaScript Basic knowledge of programming concepts Familiarity with the command line to create new directories Visual Studio Code installed.
Please click "I medium cookies" to let blockchain know you're okay with our use of all blockchain. When the client approves the PoC, the next step is to prepare technical and visual designs for the application. Development know which development the best blockchain development tool for your project, medium our team of blockchain experts. For example, suppose you are a healthcare blockchain who wants to develop a blockchain-based health record medium app. This is obviously a problem with smart contracts because, contracts by definition, must be capable of termination within a given time limit. Media The development fantastic podcasts I recommend are the Software Engineering Daily Blockchain interviewswhich provide good technical intros to many topics and cryptocurrencies.
Prerequisites
If you have an application medium needs to manage massive data, blockchain can be used to manage a single development distributed ledger. In Ethereum, you pay miners blockchain execute medium programs on this distributed virtual machine. What is the Blockchain Development Process? Ask community. Since blockchain is a distributed ledger, all development of the blockchain share the same updated ledger.
How to develop blockchain from scratch?
Think of transaction execution itself. Some languages are good at parallel operations while some are good in non-parallel operations. That is called deterministic behavior. So, in blockchain development, all transaction operations must be deterministic. You cannot have a transaction that behaves one way and then behaves another way the next day. Similarly, you cannot have smart contracts that work in two different ways on two different machines.
The only solution to this is isolation. Basically, you isolate your smart contracts and transactions from non-deterministic elements. There are some languages that fulfill most of these needs. Javascript is usually used to create highly interactive web pages.
How do we make a block? What does a simple block consist of? Before we continue. You need to understand certain terms that we are going to use in our program:. Ok, so this right here is out a block. So, in the first line of the code, we called the crypto-js library because the sha hash function is not available in JavaScript.
Next, we invoked a constructor inside the class to call for objects which will have certain values. The thing that probably catches your eye is the calculateHash function. In a block, we take all the contents and hash them to get the hash of that particular block. We are using the JSON.
Ok, so we have the block ready and good to go. So, the moment a new chain is created, the genesis block is invoked immediately. Firstly, we will need to know what the last block in the blockchain currently is. For that we use the getLatestBlock function. So, what is happening here? How are we adding the blocks? How are we checking if the given block is valid or not? So, what we are going to do here is simple.
Compare the previous hash value of the new block with the hash value of the latest block. If these two values match, then this means that the new block is legit and it gets added to the blockchain. Now, we need to check that nobody has been messing with our blockchain and that everything is stable. We created a new cryptocurrency based on the blockchain and named it BlockGeeksCoin. By invoking this new object, I activated the constructor, which in turn created the Genesis block automatically.
Thank you savjee. While it was first proposed by American cryptographer Nick Szabo in , Ethereum is often credited with popularizing the concept and making it mainstream. You can learn more about smart contracts in our in-depth guide here. Anything that runs on a blockchain needs to be immutable and must have the ability to run through multiple nodes without compromising its integrity.
As a result of which, smart contract functionality needs to be three things:. A program is deterministic if it gives the same output to a given input every single time.
So when a program gives the same output to the same set of inputs in different computers, the program is called deterministic. Basically, it states that there is an inability to know whether or not a given program can execute its function in a time limit. This is obviously a problem with smart contracts because, contracts by definition, must be capable of termination within a given time limit.
In a blockchain, anyone and everyone can upload a smart contract. However, because of this the contracts may, knowingly and unknowingly contain viruses and bugs. If the contract is not isolated, this may hamper the whole system.
Hence, it is critical for a contract to be kept isolated in a sandbox to save the entire ecosystem from any negative effects. The project is initiated with PoC, which typically takes weeks.
Once the PoC is done, it takes weeks to develop a minimum viable product with bare minimum features. Launching an application on the mainnet takes around months based on the requirements of a client. If you are looking for a blockchain development partner who can help you develop a blockchain application, we have consolidated a list of some top blockchain development companies.
From consultation to PoC, visual and technical designs, development, deployment and maintenance, blockchain experts at LeewayHertz provide end-to-end assistance to startups and enterprises. LeewayHertz is one of the first companies which has developed a signing platform on the blockchain.
Somish Somish is a technology and product development company that builds automated solutions using emerging technologies. It was established in and has been serving companies to re-engineer, design, build and implement automation systems. Somish dived into blockchain technology in and has developed blockchain projects for governments, municipal corporations, retail companies, finance companies and various other industries.
SoluLab Founded in , SoluLab is a technology company with expertise in the blockchain, mobile and web development. Specialized in Hyperledger Fabric, Smart Contract Development, Private and Public Blockchain Development, their team can build a secure and robust blockchain solution for your business. Their blockchain development services cater to various industries like healthcare, supply chain management, government, education, publication and media and real estate.
Venture Aviator Venture Aviator develops, tests and deploys custom blockchain applications with an interactive and engaging approach. They have developed robust blockchain solutions for growth companies and Fortune companies like Allianz and Cisco.
They aim to assist startups, enterprises and entrepreneurs in developing technology platforms. SoftwareMill is one of the leading blockchain companies that deliver value to its clients with high-quality development. They have a dedicated team of skilled developers who can cater to a wide array of business requirements within the estimated budget. Based in Poland, they believe that they can resolve the industry-related issues with the digital solutions built on the latest technologies.
Our experts can convert your idea into a real solution by implementing blockchain technology into your project idea. Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website.
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It is mandatory to procure user consent prior to running these cookies on your website. A Complete Guide to Blockchain Development. Table of Contents. How to develop Blockchain from scratch? What value does Blockchain add to your platform?
When to use blockchain for your startup or existing platform? How much does it cost to build a blockchain-based platform? What is the blockchain development process? What is the best app development tools? How long blockchain development takes? List of top blockchain development companies. How to develop blockchain from scratch? However, many other options allow us to build blockchain protocols in a short period.
Processing Speed Blocks are confirmed rapidly, and transactions are added to the blockchain within 1. Self-sustaining Bitshares ensures the blockchain covers costs to keep going with no maturity date, as it is backed by an ecosystem of dApps to self-fund its native token BTS.
Security It is impossible to hack the Delegated Proof-of-Stake DPoS protocol as it involves taking out many global, active and trusted delegates. More Transparency The history of transactions is becoming more transparent with the implementation of blockchain. Reduced Costs Reducing costs is a priority for most businesses. When to use blockchain for your Startup or existing Platform?
Do you want to store data? Is the data dynamic with an auditable history? Is the speed of the transaction vital for you? Should a central authority control your data? Do you require a trustless environment? Do you need a little change or no change in rules on the system? How much does it cost to build a blockchain based platform? When estimating the cost to build a blockchain-based platform or application, you need to consider the following scenarios: Developing a blockchain app with an in-house team Hiring freelancers for blockchain app development Hiring blockchain development companies for blockchain app development Here is our analysis of the estimated cost of blockchain development for a minimum viable product when using different development resources.
The cost of blockchain app development also depends on the following factors: Type of Blockchain App you need The complexity of a Blockchain Project People involved in developing an app Project Management Tools Third-Party Tool Subscription Costs Type of Blockchain App you require Every business requires a digital solution to run their business operations efficiently.
The complexity of a Blockchain Project The complexity of a blockchain project depends on the issues that an application wants to solve. Project Management Methodology Companies might use agile methodology tools such as Jira, Confluence, and Trello to manage blockchain projects. Third-party Subscription Tools Your blockchain app might require a subscription to third-party subscription tools such as bug tracking tools, notification services, amazon web services, software monitoring services, and data analytics tools.
What is the Blockchain Development Process? Identify problems you want to solve with blockchain First of all, it is essential to develop a problem statement and understand all of the issues you want to solve with a proposed solution. Choose the right blockchain platform As mentioned above in the article, building a blockchain from scratch requires thorough research and takes months to years to develop it successfully. Visual and Technical Designs Since you have planned an entire application at this stage, start creating UIs for each software component.
Development Development is the significant phase of the blockchain development process, where you should be ready to build the blockchain app.
Firstly, an application that does not undergo formal testing is a pre-alpha version of the app. What are the best Blockchain App Development Tools? Mist Before using Ethereum, you should have a place to store Ether tokens and execute smart contracts.
Solium Security plays a prominent role when it comes to building a blockchain application. EtherScripter EtherScripter has an easy-to-use interface used for coding basic smart contracts. Embark A development framework for Ethereum-based dApps, Embark, is used to build and deploy dApps and enable you to create smart contracts written in Javascript programming language. Metamask It is a wallet that connects Chrome or Firefox with Ethereum blockchain by acting as a browser extension.
Truffle Truffle is a framework for Ethereum that provides a development environment. Interactive console for direct contract interaction. Built-in smart contract compilation, deployment, binary management and linking. Network Management for deploying public and private networks. External script runner to execute scripts within a Truffle environment. List of Top Blockchain Development Companies. SoftwareMill SoftwareMill is one of the leading blockchain companies that deliver value to its clients with high-quality development.
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Learn to assess scenarios for when to use blockchain and decide if it's right for your solution. Discover how Solidity can make it easy to program smart contracts for the Ethereum blockchain platform.
Skip to main content. Contents Exit focus mode. Table of contents. Get started with blockchain development Learning Path 6 Modules. In this learning path, you will: Learn the foundations of blockchain and how blockchain technology works. Gain an understanding of the tools to develop on the Ethereum blockchain.
How To Become A Blockchain Developer - Blockgeeks
The bibliography is also worth exploring for further reading by security experts. Learn medium decentralized apps and how to build your own. When the supply of goods from development place to another is recorded on the blockchain, you get development complete audit trail representing where an asset came from and tracks each stop that it covers on the medium. If your blockchain app is a hybrid blockchain, i. I am too. It is extremely straightforward.
Public blockchains tend to spread messages via gossip protocols using flooding. Blockchains have their own place, but they draw upon the lessons of these networks and how they were designed. Cryptocurrencies are inherently multidisciplinary — this is part of what makes them so fascinating and radical.
Besides computer science, cryptography, and networking, they are also deeply interwoven with economics. Cryptocurrencies can derive many security properties through their economic structures, which is often termed cryptoeconomics. As such, economics is essential to understanding cryptocurrencies.
The most important branch of economics that plays into cryptocurrencies is game theory , the study of payoffs and incentives among multiple agents. Two key concepts in your repertoire should be Nash equilibria and Schelling points , as they feature prominently in cryptoeconomic analysis.
Cryptocurrencies are not just protocols, they are also forms of money. As such, they respond to the laws of macroeconomics if they can be called laws. Cryptocurrencies are subject to different monetary policies , and respond predictably to inflation and deflation. You should understand these processes and the effects they have on spending, saving, etc. Another valuable economic concept is the velocity of money , especially as it corresponds to valuing a currency.
Cryptocurrencies are also deeply interwoven with markets, which requires an understanding of microeconomics. For many coin distributions and cryptoeconomic systems, auction theory features prominently.
If you are, feel free to skim or skip over them entirely. In October of , Satoshi Nakamoto published a white paper in which he described a protocol for a decentralized digital currency.
He called this protocol Bitcoin. First, I recommend building your intuitions about proof-of-work and the fork choice rule also known as Nakamoto consensus. Start here:. Here are some good resources. Source and slides here.
There are also other blockchain implementations you can find, written in various programming languages. You should also by now have enough background that you should be able to read and understand the original Bitcoin whitepaper. To understand the economics and mechanics of Bitcoin mining, I recommend watching the lecture on Bitcoin mining in the Bitcoin and Cryptocurrencies Princeton course.
You should also be able to play around with a Bitcoin block explorer and navigate raw Bitcoin transactions. Now is a good time to study up on the history of Bitcoin and cryptocurrencies. The below video, offered by a UC Berkeley Decal, gives a good overview. You understand how blockchains and proof-of-work can achieve distributed, Byzantine fault-tolerant consensus within a peer-to-peer network. But a payments network is just one application you can run atop such a blockchain.
In , Vitalik Buterin, the creator of Ethereum asked: what if you used a blockchain to implement a decentralized computer? In Ethereum, you pay miners to execute your programs on this distributed virtual machine. This means you can perform arbitrary computations, using a Turing-complete programming language unlike Bitcoin script. This brings us to smart contracts — the name for programs that run on such a virtual machine.
In other words, you can create financial contracts that automatically enforce themselves. Ethereum has enabled the wave of ICOs and developers building atop the blockchain. It is the second largest cryptocurrency behind Bitcoin, it has more than 10x the developers of the next most popular platform, it has the strongest developer team, the most mature tooling, and the majority of ICOs and projects atop it.
It also has the most industry support , which goes a long way. The ideas behind Ethereum have also spawned a wave of innovation in cryptoeconomics. You should dip your toes into the ideas around DAOs , and all of the sci-fi fever dreams that they hint at.
As with any technology, the best way to get acquainted with Ethereum is by building a few small projects. The dominant programming language for Ethereum is Solidity, which is a statically typed JavaScript-esque language. To get your first exposure to Solidity development, I recommend working through all of the CryptoZombies tutorial. I recommend this guide as a first tutorial to walk you through the process.
This tutorial does a good job of walking you through an end-to-end blockchain stack and explaining the pieces as they go along. Karl Floersch has a great tutorial where he walks through how to build a secure commit-reveal voting system. Great, now for your mid-term exam: build a secure coin toss game, where two players can securely bet on the coin flip. No tutorial this time, do it on your own. Think about possible attacks — how can the players cheat?
Can you ensure that they play honestly? Here are some hints. Security is absolutely essential to blockchain development. Smart contracts have been plagued by disastrous hacks, including the DAO hack , the Parity Wallet hack , and the affectionately named Parity Wallet hack 2 now with its own T-shirt. The truth is, smart contracts are extremely hard to get right. Though the programming toolchain will improve to make these exact attacks harder, they were ultimately all due to programmer error.
There are also many subtler bugs that arise from smart contract programming, such as in frontrunning or secure generation of randomness. As a smart contract developer, you must treat security as paramount. That means any code that handles significant flows of money should be run through static analyzers like Oyente or Securify , tested thoroughly, and then audited by an experienced smart contract auditor.
To strengthen your security chops, I recommend working through The Ethernaut by OpenZeppelin, a game where you find and attack vulnerabilities in smart contracts. Many of them have you replicate real attacks against smart contracts that have occurred in the wild. Phil Daian also has an excellent set of smart contract hacking challenges called Hack This Contract. There are some languages that fulfill most of these needs.
Javascript is usually used to create highly interactive web pages. How do we make a block? What does a simple block consist of? Before we continue. You need to understand certain terms that we are going to use in our program:. Ok, so this right here is out a block.
So, in the first line of the code, we called the crypto-js library because the sha hash function is not available in JavaScript. Next, we invoked a constructor inside the class to call for objects which will have certain values. The thing that probably catches your eye is the calculateHash function. In a block, we take all the contents and hash them to get the hash of that particular block. We are using the JSON. Ok, so we have the block ready and good to go.
So, the moment a new chain is created, the genesis block is invoked immediately. Firstly, we will need to know what the last block in the blockchain currently is. For that we use the getLatestBlock function. So, what is happening here? How are we adding the blocks? How are we checking if the given block is valid or not?
So, what we are going to do here is simple. Compare the previous hash value of the new block with the hash value of the latest block. If these two values match, then this means that the new block is legit and it gets added to the blockchain. Now, we need to check that nobody has been messing with our blockchain and that everything is stable.
We created a new cryptocurrency based on the blockchain and named it BlockGeeksCoin. By invoking this new object, I activated the constructor, which in turn created the Genesis block automatically. Thank you savjee. While it was first proposed by American cryptographer Nick Szabo in , Ethereum is often credited with popularizing the concept and making it mainstream. You can learn more about smart contracts in our in-depth guide here.
Anything that runs on a blockchain needs to be immutable and must have the ability to run through multiple nodes without compromising its integrity. As a result of which, smart contract functionality needs to be three things:. A program is deterministic if it gives the same output to a given input every single time.
So when a program gives the same output to the same set of inputs in different computers, the program is called deterministic. Basically, it states that there is an inability to know whether or not a given program can execute its function in a time limit. This is obviously a problem with smart contracts because, contracts by definition, must be capable of termination within a given time limit. In a blockchain, anyone and everyone can upload a smart contract.
However, because of this the contracts may, knowingly and unknowingly contain viruses and bugs. If the contract is not isolated, this may hamper the whole system.
Hence, it is critical for a contract to be kept isolated in a sandbox to save the entire ecosystem from any negative effects.
Now that we have seen these features, it is important to know how they are executed. Usually, smart contracts are run using one of the two systems:. If you are interested in Ethereum development specifically then it is important that you learn solidity as well. We already have a detailed guide to it which you can read here. However, here we are going to give you a basic overview.
Solidity was developed by Gavin Wood, Christian Reitwiessner, Alex Beregszaszi, Yoichi Hirai and several former Ethereum core contributors to enable writing smart contracts on blockchain platforms such as Ethereum. If you are interested in learning solidity then you can check our in-depth class here. One of the most important things that you can do as a budding developer is to constantly stay in the mix. Write Ethereum smart contracts by using Solidity.
Learn how to install and use tools that you can use to develop smart contracts. Create tokens using OpenZeppelin. Learn about the significance of tokens and how they are used in blockchain. Create a user interface with decentralized apps. Learn about decentralized apps and how to build your own. Connect and deploy to Ethereum networks. Learn about and use Ethereum networks for development, testing, and production.