This course will familiarize you with building smart contracts and Web3 apps using Solidity, Hardhat, React, Next.js, Tailwind, and frontend applications.

A Practical Introduction to Developing Web3 Apps Using Solidity and React.png

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In this course, you’ll learn to build smart contracts and Web3 apps using Solidity, Hardhat, React, Next.js, and Tailwind. Web3 apps leverage blockchain and smart contracts to enable transparent interactions, making them ideal for industries like finance, supply chain, gaming, etc.

You’ll learn to initialize and run contracts, define terms and conditions within code, and pass and store values inside contracts. You’ll explore additional functionalities like requiring valid arguments, receiving and sending payments, and ensuring balance constraints. By the end of the course, you’ll finalize the run script and successfully execute smart contracts. You’ll also experience building the frontend using React and related technologies, and learn about the front-end tech stack for Web3 applications.

This course will empower you to become proficient in Web3 app development, enabling you to contribute to the growing decentralized ecosystem and take advantage of the exciting opportunities blockchain technology presents.

An Introduction to Developing Web3 Apps Using Solidity and React

It’s the computational cost of performing operations on the Ethereum blockchain.

It's the monetary cost of performing operations on the Ethereum blockchain.

What does the term "gas" mean in the Ethereum context?

What does the term “gas” mean in the Ethereum context?

Which method is used to see if a transaction failed (with a given message)?

Which method is used to see if a transaction failed (with a given message)?

Which keyword is used in Solidity to iterate over loops?

Which keyword is used in Solidity to iterate over loops?

It means that the operation inside the function doesn't rely on any external state.

It means that the operation outside the function doesn't rely on any external state.

It means that the operation inside the function relies on an external state.

It means that the operation outside the function relies on an external state.

What does a `pure` function mean in the Solidity context?

What does a <code>pure</code> function mean in the Solidity context?

It costs less gas to run `pure` functions.

It doesn't cost any gas to run `pure` functions.

There is no relation between `pure` functions and gas.

What is the advantage of `pure` functions from the perspective of gas?

What is the advantage of <code>pure</code> functions from the perspective of gas?

The number of addresses entering the contract is the same.

The split ratio and amount of money to be divided among participants is the same.

The split ratio and number of addresses is the same.

Refer to the code below:
```solidity
require(
  _splitRatios.length == _addresses.length
);
```
What does this condition ensure?

Refer to the code below:
<pre><code class="language-solidity">require(
 _splitRatios.length == _addresses.length
);
</code></pre>
What does this condition ensure?

Which variable is used instead of `split ratios`?

Which variable is used instead of <code>split ratios</code>?

When is the split ratio=[1,1,1] valid?

```
require(
  _addresses.length > 1
);
```

```
require(
  _splitRatios.length > 1
);
```

```
require(
  _addresses.length > 2
);
```

```
require(
  _addresses.length == _splitRatios.length
);
```

Which code block ensures that the contract fails to deploy when it is called with less than two addresses?

Which code block ensures that the contract fails to deploy when it is called with less than two addresses?

Smart Contracts

Smart Contracts

Take a short quiz to test your understanding of smart contracts. 

Introduction to Web3.0

Introduction to Solidity and Smart Contract Development

Introduction to Web3 App Development Using Solidity and React

Final Project

Appendix

Quiz 2: Smart Contracts