What is web 3.0 in simple terms?

Web 3.0 has the potential to change the internet as we know it forever. You’re still early in catching
the trend and building your first blockchain application, acquiring the skills to get a high-paying job, or creating your own web3 projects that can make you money.

In Web 2.0 all the data is controlled by the Big Tech companies, such as Google, Apple, etc. In the decentralized web, no single person/company owns any data or information about anyone and everything is visible to the public.

Web3.0, also known as the decentralized web, is the third and latest” phase” of the internet of the future you can say the evolution of the web and built on peer-to-peer networks of computers that talk to each other without middlemen

Web 3.0 Roadmap

1. You should have Web 2.0 Skills

Most people make one mistake of diving straight into smart contracts without having a technical
background in web development. Blockchain technologies are built on top of web technologies.

You can’t learn web 3 technologies if you don’t have a solid understanding of web 2.0. So before digging more deeper into web 3o better understand the fundamentals of web development in general.

Your Web 2.0 skills like React.js, and Next.js will be beneficial because Decentralized Applications have a standard vanilla JavaScript or JavaScript framework Front-end.

2. Learn the Fundamentals of Blockchain

As a Web 3.0 developer, you need to understand what the blockchain is, how it works, and why we use it. You first need to know about what you are working with.

So what is a blockchain?

A blockchain is a network of computers connected in some way, and they collectively run what is called a blockchain client. Blockchain technology is no more related only to crypto coins.

To learn and master the basics of blockchain technology. First, learn the fundamental things
such as:

• What the blockchain is
• How it works
• How to Interact with the blockchain
• How to connect oui web applications to
  the blockchain

And it is recommended that you get started with the Ethereum blockchain as it is very popular. Also, one of the reasons to learn Ethereum blockchain first is there is a lot of technical support from its developer’s team plus
considerable community support.

3. Learn About Smart Contracts

A Smart Contract is software stored on a blockchain-based platform that automatically executes an agreement. Smart contracts are how you can program the blockchain to perform a specific set of instructions, like you telling the blockchain what to do.

Smart contracts enable you to exchange anything of value while also eliminating the middle man. The self-executing feature of a smart contract is what makes it very important.

The smart contract code cannot be changed, which in technical terms, we say is immutable. Smart contracts can do everything, right from NFTs to creating your own Crypto Currency to handling the backend of dApps.

Here’s the IBM definition for Smart Contracts:

Smart contracts are simply programs stored on a
blockchain that run when predetermined conditions
are met. They are typically used to automate an
agreement’s execution so that all participants can
be immediately sure of the outcome without any
intermediary’s involvement or time loss.
— IBM

Things to learn about Smart Contract –

• Basics of Smart Contract
• Life Cycle of Smart Contract
• Interacting with smart contracts using web3.js

Compiling, Testing, Deploying Smart contracts

Compiling, Testing, and Deploying SmartContracts is an essential part, as we know those smart contracts, once deployed, are immutable, so you would like to test them before deploying.

For Testing, you can go with:

For deployment purposes, you can use:

4. Learn Solidity

Knowing how to write smart contracts is essential in blockchain app development. So in which programming language do we write smart contracts? It’s! Solidity

Of course, there are some other programming languages also, but solidity is the most popular one. So understanding Solidity is crucial.

Solidity is an object-oriented programming language for writing smart contracts. It is used for implementing smart contracts on various blockchain platforms.

Solidity is a relatively new programming language used for Ethereum blockchain and it’s a combination of a few languages. The creators of Solidity got inspired by JavaScript, Java, C++, rust, & many other languages, therefore making Solidity extraordinarily versatile & intuitive.

As you start to write code in Solidity, you’ll notice that all of that seems similar, maybe from Java,
JavaScript, but it will make sense as it’s almost written in pure English.

Here is a small code sample of solidity programming language.

//My Smart Contract

paragna solidity >= 0.5.0 < 0.7.0;
contract HelloWorld {
   function get()public pure return (string memory){
            return'Hello Contracts';
    }
}

Also, one more reason to learn about Solidity is the job market. Many companies require developers who know Solidity well.

5. Learn more about Decentralized applications

Once you build and deploy your smart contract, you’ll need to create a friendly user interface at the front end so that any user use it. Remember I said earlier you should have Web 2.0 skills before starting blockchain development.
In the front-end interface, you create a DAPP(Decentralized application). The DAPP can be a mobile app or a web app, but it is usually a web app in most cases. The web app is usually just like your regular web apps with HTML, CSS, JavaScript, Python, and SQL.

And when building the dApp, there will be two essential tasks,

1. The integration with the blockchain

2. The integration with the wallet

We shall use a JavaScript library for integration with the blockchain, Web3.js, which is pretty helpful and easy to use.

6. Learn about Metamask or any equivalent Crypto Wallet

A blockchain wallet helps someone exchange funds quickly. The transactions are secure, as
they are cryptographically signed. A wallet is used to interact with the blockchain. The wallet is
accessible from web devices, including mobile ones, and the privacy and identity of the user are
maintained.

A blockchain wallet provides all the necessary features for safe and secure transfers and
exchanges of funds between different parties. It is very similar to sending or receiving money
through PayPal or any other gateway used today, but you use cryptocurrency instead.

There are a lot of crypto wallets out there, but my recommendation would be first to learn
how to integrate your smart contract with the Metamask wallet and then learn about the other wallets.

Metamask allows users to access their Ethereum wallet through a browser extension or mobile
app, which users can then use to interact with decentralized applications.

7. Learn Web3.js and Ethers.js to connect your dAPP

You’ll need to interface with your front end to talk to the blockchain. Here are two popular choices
to interface with blockchains that implement the Ethereum API, web3.js and ethers.js.

Web3.js is a collection of libraries that allow you to connect with a local or remote Ethereum node
using HTTP, Websockets, & other communication protocols directly from your JavaScript Based
front-end.

Ethers.js is a lightweight JavaScript library used to connect the JavaScript front-end with Smart
Contacts as an alternative to Web3.js.

8. Practice your skills by building a blockchain application.

After that, I suggest you should get your hands dirty with the technologies you have learned so
far. Practice, Practice, and Practice!

To keep learning effectively, you have to challenge your capabilities. Take up a project
well beyond your capabilities and stick to that project until you complete it. By the end of just
4-5 such assignments, you will be almost more proficient than others around you.

9. Build your Portfolio

When you’re comfortable working with blockchains/dApps, you should consider building
your portfolio; a portfolio website shows evidence of expertise in your field. It can also help build
trust with clients because they have direct evidence of the quality of your work.

A portfolio will be beneficial whether you are looking for Jobs or Internships. More importantly,
potential clients and employers will sense confidence in you.

Learning Resources

=> What Exactly is web 3.0?

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