Ethereum : Master Web3js Library
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:
Back-end software (logic)
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.
This course is start from beginning so every student could joint
What will you learn
You will learn
The big picture
Create web3 object
Local hosted with ganache
Remote hosted with infura
Create new account
Get account balance
Subscribe block headers
Subscribe pending transactions
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.
Understand how to work with Ethereum account
Understand how to work with Ethereum blockchain
Understand how to work with Ethereum smart contract
Understand how to work with Ethereum transaction
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Ethermint is designed to be a Proof of Stake implementation of the Ethereum Virtual Machine built on top of Tendermint Core
Ethermint is designed to be a Proof of Stake implementation of the Ethereum Virtual Machine built on top of Tendermint CoreWhat is it?
ethermint will be an implementation of the EVM that runs on top of
tendermint consensus, a Proof of Stake system. This project has as its primary goals:
gethand import token balances into Ethermint
To build, execute the following commands:
# To build the binary and put the resulting binary in ./build $ make tools verify build # To build the project and install it in $GOBIN $ make tools verify install
Integration tests are invoked via:
$ make test
To run CLI tests, execute:
$ make test-cli
There is an included Ethereum mainnet exported blockchain file in
that includes blocks up to height
97638. To execute and test a full import of
these blocks using the EVM module, execute:
$ make test-import
You may also provide a custom blockchain export file to test importing more blocks
--blockchain flag. See
TestImportBlocks for further documentation.
The following chat channels and forums are a great spot to ask questions about Ethermint:
Developing blockchain applications for Ethereum (or Dapps) is a roller coaster of emotional ups and downs for developers. The potential decentralization offers is exciting, but the ecosystem is still feeling it’s growing pains as there are still barriers to user adoption and development. As a result, building the frontend for Dapps can be a painful process for developers…until today. The Matryx Team (www.matryx.ai) has been working on easier ways of creating a Vue.js based frontend for Dapps supporting Ethereum Smart Contracts.
Vuethereum is a collection of Vue.js components for interfacing with Ethereum’s Web3. As a result, it combines the power of working with Web3 smart contracts, with the simplicity of developing with Vue.js.
Simply install the library via NPM:
npm install vuethereum
Then include it in your project:
// main.js import Vue from 'vue' import Vuethereum from ‘vuethereum’ Vue.use(Vuethereum) // the rest of your main.js file
At the time of writing, Vuethereum includes four components:
With these tools in place, we can build a complex UI’s that can check if Web3 is available, access the user’s address and network, provide a smart contract to interface with, and finally, show the details from any transaction. Cool!