Coffee Supply Chain DAPP

This is the third project for @Udemy Blockchain developer Nanodegree. The purpose of this project is to go over how smart contracts can work as an extremely valuable resource for the management of supply chains.

What this dapp will do:

"Coffee Supply Chain" dapp is a decentralized application that covers the supply chain of Coffee, from farmers to consumers. The user story is similar to any commonly used supply chain process. A Seller can add items to the inventory system stored in the blockchain. A Buyer can purchase such items from the inventory system. Additionally, a Seller can mark an item as Shipped, and similarly a Buyer can mark an item as Received.

Where you can find the contracts:

All contracts are on Rinkeby Ethereum test network.

• Contracts address and create transactions:

  -FarmerRole:

  • 0x8B0a50441B91B1590c39622416DEc94B56D7EAF1
  • 0xfe712c580df53fed4ec426be28b542053c108c069a6767a74679f564e894a3e5

  -DistributorRole:

  • 0x0D1FB057EA85DF7FEE88e06E2cE0a7B8f30028FD
  • 0x908be5d3062bffea0dc3acbc14df473baa851de63b9d6383f0961a08d1d75fc5

  -RetailerRole:

  • 0xC502282AdC3FB10fB272cb8fF1791869b0dC3B49
  • 0x2b823868dc92a565d3cbd1dcaba8aeeb81ee7efcdaf8749ce9fc24c30a6b9777

  -ConsumerRole:

  • 0x3DE8Cd83774872041C8142082b3F15f46252b901
  • 0x9c2945f7d9358dda0e1aa138c587e9922aa40e679d514e331e894b683097a076

  -SupplyChain:

  • 0xB90b438b5133eA5202E77b42a66cfd2953Eb1edb
  • 0x1527a4b04eca48f84d400c163e2863afee513415d856b55a054ff70b4491abb3

Technology versions used:

- Solidity version ^0.5.16
- Truffle version v5.1.20
- truffle-hdwallet-provider version ^1.0.0-web3one.5
- web3 version ^1.2.6
- node version v10.15.0
- npm version 6.4.1

For testing:

- Chai
- Mocha

Run Crypto Star dapp local:

Prerequisites

You need to have a ganache ui up and running

Commands for running local

npm install
truffle compile
truffle migrate
cd app
npm run dev

To run the unit test:

truffle test

Sample transactions from UI:

Product Overview:

Farmer Details:

Transactions to ehterscan:

• Harvest
• Process
• Pack
• For Sale

Product Details

Transactions to ehterscan:

• Buy
• Ship
• Receive
• Purchase

Transaction History