ToDo List Ethereum Dapp (Intro)

Last updated: November 2018.

This tutorial series will teach you how to build a ToDo List Dapp on Ethereum. It is regularly UPDATED with the latest development of Solidity, Truffle & Web3. Already published:

• Intro
• Step 1: Writing The ToDo Smart contract – beginning
• Step 2: Writing The ToDo Smart contracts – end
• Step 3: Writing The Nodejs Backend
• Step 4: Setup the frontend and read account data
• Step 5: Build a smart contract client with Truffle Contract
• Step 6: Refactor With Webpack, ES6 and truffle-solidity-loader
• Step 7: Read Contract data from Frontend
• Step 8: Create smart contract data from frontend
• Step 9: Toggle task done & keep frontend updated

Each tutorial has:

• Video
• Article
• Code

You will learn how to:

• Develop Solidity smart contracts: data structures, functions, modifier, mapping, arrays, and more.
• Use the Truffle framework to build Ethereum Dapps: compilation, migration, configuration of Truffle project
• Use Web3 and TruffleContract to communicate between the frontend and the smart contract
• Configure Webpack for Ethereum Dapp development (with truffle-solidity-loader)

This will cover every part of the Dapp:

• Smart contract (Solidity)
• Backend (Nodejs server to serve the frontend)
• Frontend (Javascript and jQuery)

The dapp will be able to:

• create new tasks
• list existing tasks
• toggle a done/not done status for each task.

Once finished it will look like this (click to enlarge):

Requirements

Before starting, make sure to have installed:

• Nodejs (v8.9.0 / npm v4, or a later version of the nodejs v8 branch). Nodejs v6 will probably also work.
• Truffle framework (v4). This is the most popular framework used for developing Solidity smart contracts. It can be installed with npm:
  npm install -g truffle
• The Ethereumjs-testrpc v4 (v6). This is a developer version of the Ethereum daemon that can run a local Ethereum blockchain. Very useful for developers. It is also sometime called “testrpc” and “local testnet”. It can be installed with npm:
  npm install -g ethereumjs-testrpc
• UPDATE January 2018: ethereumjs-testrpc has been renamed to ganache-cli. Using the package mentioned before will also work, but it is better to use “ganache-cli” for your future projects.