Coffee Bean Supply chain (Ethereum)

This project is an Ethereum DApp to trace business process history in a Supply Chain flow.

Info of project

• Truffle v5.0.20 (core: 5.0.20)
• Solidity v0.5.0 (solc-js)
• Node v10.16.0
• Web3.js v1.0.0-beta.37

Install dependencies

$ sudo npm install

Front-end dependencies

$ cd app
$ sudo npm install --unsafe-perm

Smart contract

Transaction Hash : 0x11eaaeee585e8c04b6044d7f70f4ee422ded8dc65bea8f292fe3065069fb4650

Contract address: 0x9DC1F74C58Be10d0EB9eECf6f27CdAb0b91fCbdf

Planning overview

Activity diagram

Sequence diagram

State diagram

Configuring Private network in

Launch Ganache:

ganache-cli -m "spirit supply whale amount human item harsh scare congress discover talent hamster"

Go to your Metamask Chrome Extension Use option, Connect using “Custom RPC”, at address http://127.0.0.1:8545/ Use the Private Keys provided by Truffle to import at least two accounts.

Running DAPP

To run your application you will need to:

$ truffle develop

or

$ sudo truffle develop commands

Every time to compile the contract ,you'd better to delete build folder. and run compile with --all.

> compile --all

> migrate --reset

Then

Open a second terminal window, and make sure you are inside your project directory. Run cd app to move inside the app folder. Run

$ npm run dev

dev is script of webpack.This will start our port at 8080. Open http://localhost:8080/ in your browser. Make sure the Metamask extension is installed.you are logged into http://127.0.0.1:8545 private network.

Test DAPP

Run. when did steps of Running DAPP.

$ truffle test

Tests with Mocha and Chai in TestSupplychain.js. Using artifacts that is resolver.

Refer to the following

truffle/packages/truffle-require/require.js - GitHub

 const fs = require("fs");
 const path = require("path");
 const Module = require("module");
 const vm = require("vm");
 const originalrequire = require("original-require");
 const expect = require("truffle-expect");
 const Config = require("truffle-config");
 const Web3Shim = require("truffle-interface-adapter").Web3Shim;

  ...
 const context = {
  ...

  artifacts: options.resolver,
  setImmediate: setImmediate,
  setInterval: setInterval,
  setTimeout: setTimeout

  ...
}
  ...
const script = vm.createScript(source, file);
script.runInNewContext(context);
  ...

It seems like Running a V8 in your computer. The artifacts is resolver, So we can interact with Contracts by const SupplyChain = artifacts.require('SupplyChain')in TestSupplychain.js

Migrate DAPP to Rinkeby Test Network

• You will need to have your Metamask’s seed and Infura setup. Connect Rinkeby network in Metamask and Get Testnet Coins from Test Ether Faucet or Google it.
• Update the truffle.config file to add settings to deploy your contract to the Rinkeby Public Network.
• Edit your mnemonic of MetaMask in '.secret'

const HDWalletProvider =   require('truffle-hdwallet-provider');
const infuraKey = "INPUT YOUR INFURAKEY";

const fs = require('fs');
const mnemonic = fs.readFileSync(".secret").toString().trim();```


rinkeby: {
 provider: () => new HDWalletProvider(mnemonic, `https://rinkeby.infura.io/v3/${infuraKey}`),
   network_id: 4,       // rinkeby's id
   gas: 4500000,        // rinkeby has a lower block limit than mainnet
   gasPrice: 10000000000
},

Deploy Contract to Rinkeby:

$ truffle migrate --reset --network rinkeby

Versioning

We use SemVer for versioning. For the versions available, see the tags on this repository.

Built With

• Ethereum - Ethereum is a decentralized platform that runs smart contracts
• IPFS - IPFS is the Distributed Web | A peer-to-peer hypermedia protocol to make the web faster, safer, and more open.
• Truffle Framework - Truffle is the most popular development framework for Ethereum with a mission to make your life a whole lot easier.

Authors

• Tom - Fullstack egineer - github profile

If you have any question. feel free to contact me.

License

This project is licensed under the MIT License