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Complete Web3js Library (Ethereum) Course
Rating: 4.1 out of 5(64 ratings)
5,034 students

Complete Web3js Library (Ethereum) Course

Everything you need to know about Web3js
Created byDesigners Lab
Last updated 2/2022
English
English [Auto],

What you'll learn

  • What is Ethereum?
  • What is web3 .js library?
  • Interacting with Blockchain(Ganache)
  • Interacting with Smart Contract
  • Using browser to interact with smart contract
  • Generation of ABI and Byte Code using web3js
  • Deployment of Smart Contract

Course content

1 section • 8 lectures • 1h 15m total length

  • Course overview2:11

    Explore Web3.js essentials, from understanding web 3.0 and ethereum modules to transferring ether and fetching accounts, then generate eba and bytecode, compile, and deploy contracts with remix, plus prerequisites.

  • Course Prerequisites1:31

    Develop a blockchain foundation with Ethereum concepts and Solidity, and prepare for smart contract compilation and deployment, plus JavaScript basics and Ganesh setup for Web 3.0 development.

  • What is web3.js library?5:45

    Learn how web3.js is a collection of libraries that lets you connect a website to an Ethereum node and interact with smart contracts on the blockchain.

  • Interacting with Blockchain(Ganache)16:35

    Explore how to install and import Web3.js, connect to a Ganache local blockchain, and manage accounts by checking balances, converting wei to ether, and transferring ether between accounts.

  • Interacting with Smart Contract9:36

    Connect Remix IDE with Ganesh and deploy a smart contract, then use web3.js to call contract functions and set values by passing parameters, using the contract ABI and address.

  • Using browser to interact with smart contract10:00

    Learn to connect your browser to a local blockchain using web3.js, set up Ganache provider, and interact with a deployed smart contract by instantiating it with abi and contract address.

  • Generation of ABI and Byte Code using web3js15:41

    Learn how to generate ABI and bytecode for Ethereum contracts using Web3.js by compiling Solidity, reading source files, and deploying to Ganache with practical steps.

  • Deployment of Smart Contract13:50

    Learn how to compile a contract, generate ABI and bytecode, and deploy it to a local Ganache blockchain, selecting a default account, handling gas, and calling contract functions.

Requirements

  • some existing knowledge of ethereum dApp development will help, but not compulsory
  • some solidity knowledge will help
  • Logical thinking ability is a minimum requirement for any programming or coding related skills
  • good knowledge of blockchain, dApps, ethereum, etc will be helpful
  • Anyone can take this course, it's for beginners to advanced
  • Basic mathematics/math knowledge is a minimum requirement for any programming/coding related skills
  • You need internet access for the practical part of this course

Description

What is Etherum ?

Ethereum is an open source, globally decentralized computing infrastructure that executes programs called smart contracts. It uses a blockchain to synchronize and store the system’s state changes, along with a cryptocurrency called ether to meter and constrain execution resource costs.

The Ethereum platform enables developers to build powerful decentralized applications with built-in economic functions. While providing high availability, auditability, transparency and neutrality, it also reduces or eliminates censorship, and reduces certain counterparty risks.

What is a smart contract ?

The term smart contract has been used over the years to describe a wide variety of different things. In the 1990s, cryptographer Nick Szabo coined the term and defined it as “a set of promises, specified in digital form, including protocols within which the parties perform on the other promises”. Since then, the concept of smart contracts has evolved, especially after the introduction of decentralized blockchain platforms with the invention of Bitcoin in 2009. In the context of Ethereum, the term is actually a bit of a misnomer, given that Ethereum smart contracts are neither smart nor legal contracts, but the term has stuck. In this book, we use the term “smart contract” to refer to immutable computer programs that run deterministically in the context of an Ethereum Virtual Machine as part of the Ethereum network protocol, i.e. on the decentralized Ethereum world computer.

What is a DApp?

A Decentralized Application, or DApp, is an application which is mostly or entirely decentralized.

Consider all the possible aspects of an application that may be decentralized:

  • Front-end software

  • Back-end software (logic)

  • Data storage

  • Name resolution

  • Message communications

What is Web3.js ?

web3.js is a collection of libraries which allow you to interact with a local or remote

ethereum node, using a HTTP or IPC connection.

You will learn

  • installation

  • the big picture

  • network

    • create web3 object

    • local hosted with ganache

    • remote hosted with infura

  • account

    • create new account

    • get account balance

    • wallet

  • block chain

    • block inspection

    • subscribe block headers

    • subscribe pending transactions

  • contract

    • create contract

    • call method

    • sub event

  • transaction

    • transaction deploy contract

    • transaction send ether

    • transaction write to smart contract

Blockchain and Ethereum dapp right now are very hot technical trend. Developer with good skill of blockchain and Dapp very easy to get jobs with 6 figures. Are you interesting joining the huge innovation of Dapp ? Joint my course and I will show you.

Who this course is for:

  • Anyone interested to become a blockchain developer
  • Anyone interested to become a dApp developer
  • Anyone interested to become a decentralised application developer
  • Anyone who wants to learn blockchain programming
  • Anyone interested to learn TOP programming or coding skills for the future
  • Anyone interested to learn how to code a distributed wallet in ethereum with Solidity
  • Also for beginner Solidity developers who want to get to advanced level
  • Anyone interested to learn the frontend web3 js skills required to develop ethereum dApps(decentralized applications)
  • Also for university computer science students who would like to get into blockchain & dApp development
  • Also for anyone else who would like to learn the relevant skills to become top blockchain & dApp developers

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