Udacity Blockchain Capstone

The capstone built upon the knowledge I gained in the course in order to build a decentralized housing product.

Real Estate Marketplace

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.

Prerequisites

Node.js runtime environment is required.

Installing

Install all required dependencies

$ npm install

Install truffle

$ npm install -g truffle

Steps to run a local ethereum network, and deploy your token contract to this local network

1. Open a Terminal window, and make sure you are inside your project directory

2. Run the command truffle develop (to run a local ethereum network)

3. Use the command compile (to compile your solidity contract files)

4. Use the command migrate --reset --network development (to deploy your contract to the locally running ethereum network)

5. Use the command test (to unit tests the contract)

Zocrates integrateion

Zokrates is invoked in docker with the following command. Steps below have already been done, they are here just for documentation purpose.

Replace the <absolute path> with your path to the project.

../../../../zokrates compile -i square.code

../../../../zokrates setup

../../../../zokrates compute-witness -a 12 144

../../../../zokrates generate-proof

../../../../zokrates export-verifier

Rinkeby network

Verifier contract address

0x2157e095474d2e0DA2B0E69308b08404AEE10e73

SolnSquareVerifier contract address

0x2B6F57921932C6Ecdea08f72998DfC05cDe3a0B0

OpenSea assets

https://testnets.opensea.io/collection/decentralizedrealestate

Project Resources

• Remix - Solidity IDE
• Visual Studio Code
• Truffle Framework
• Ganache - One Click Blockchain
• Open Zeppelin
• Interactive zero knowledge 3-colorability demonstration
• Docker
• [ZoKrates](https://github.com/Zokrates/ZoKrates