Supply chain & data auditing

This repository containts an Ethereum DApp that demonstrates a Supply Chain flow between a Seller and Buyer. 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.

The DApp User Interface when running should look like...

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

Please make sure you've already installed ganache-cli, Truffle and enabled MetaMask extension in your browser.

Give examples (to be clarified)

Installing

The starter code is written for Solidity v0.4.24. At the time of writing, the current Truffle v5 comes with Solidity v0.5 that requires function mutability and visibility to be specified (please refer to Solidity documentation for more details). To use this starter code, please run npm i -g truffle@4.1.14 to install Truffle v4 with Solidity v0.4.24.

A step by step series of examples that tell you have to get a development env running

Clone this repository:

git clone https://github.com/udacity/nd1309/tree/master/course-5/project-6

Change directory to project-6 folder and install all requisite npm packages (as listed in package.json):

cd project-6
npm install

Launch Ganache:

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

Your terminal should look something like this:

In a separate terminal window, Compile smart contracts:

truffle compile

Your terminal should look something like this:

This will create the smart contract artifacts in folder build\contracts.

Migrate smart contracts to the locally running blockchain, ganache-cli:

truffle migrate

Your terminal should look something like this:

Test smart contracts:

truffle test

All 10 tests should pass.

In a separate terminal window, launch the DApp:

npm run dev

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.

1. Truffle Version: Truffle v5.4.14 (core: 5.4.14)
2. Solidity Version: ^0.8.0 (solc-js)
3. Web3 Version: v1.6.1

Contract on the Rinkeby Network

Contract address: 0x2f057A729aeE964B426C57fF97B0Bc8bF2E70785
Transaction ID: 0xb854fe5ceebfbc1f20cbcf1ea10a19ced42812ac8a2c2e9eb46003049fc606ee
Etherscan: https://rinkeby.etherscan.io/address/0x2f057A729aeE964B426C57fF97B0Bc8bF2E70785

Requirement 1: Project write-up - UML

Activity Diagram

Sequence Diagram

State Diagram

Class Diagram

Authors

See also the list of contributors who participated in this project.

Acknowledgments

• Solidity
• Ganache-cli
• Truffle
• IPFS