Decentralize ToDo List

Project Setup

  • Create folder.
  • Fire truffle init to initialize truffle project.
  • Initialize git repository with git init.
  • Add package.json file to this project and add below content. 

     {
     "name": "dec-todo",
     "version": "1.0.0",
     "description": "Blockchain Todo List Powered By Ethereum",
     "main": "truffle-config.js",
     "directories": {
         "test": "test"
     },
     "scripts": {
         "dev": "lite-server",
         "test": "echo \"Error: no test specified\" && sexit 1"
     },
     "author": "[email protected]",
     "license": "ISC",
     "devDependencies": {
         "bootstrap": "4.1.3",
         "chai": "^4.1.2",
         "chai-as-promised": "^7.1.1",
         "chai-bignumber": "^2.0.2",
         "lite-server": "^2.3.0",
         "nodemon": "^1.17.3",
         "truffle": "5.0.5",
         "web3": "^1.0.0-beta.55",
         "truffle-contract": "3.0.6"
     }
 }
  • Add .gitignore and add below content. 

     # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 # dependencies
 /node_modules
 /.pnp
 .pnp.js

 # testing
 /coverage

 # production
 /build

 # misc
 .DS_Store
 .env
 .env.local
 .env.development.local
 .env.test.local
 .env.production.local

 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
  • npm install to install dependencies.
  • Add this snippet to solidity file. 

     // SPDX-License-Identifier: MIT
 pragma solidity >=0.4.22 <0.9.0;
  • Add below snippet in truffle-config.js. 

     module.exports = {
   networks: {
     development: {
       host: "127.0.0.1",
       port: 7545,
       network_id: "*" // Match any network id
     },
   },
   contracts_directory: './src/contracts/',
   contracts_build_directory: './src/abis/',
   compilers: {
     solc: {
       optimizer: {
         enabled: true,
         runs: 200
       },
       evmVersion: "petersburg"
     }
   }
 }
  • After adding .sol files.
  • we need to do migrations in order to deploy on blockchain

GitHub

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