Udacity Blockchain Capstone

The capstone will build upon the knowledge you have gained in the course in order to build a decentralized housing product.

Version

Truffle v5.0.6 (core: 5.0.6)
Solidity v0.5.2 (solc-js)
Node v12 (Use v14 at first, however it can not migrate to rinkeby, so I downgrade to v12)
Web3.js v1.5.3

Contract Addresses, Contract Abi's, OpenSea MarketPlace Storefront link's.

Contract Addresses

Contract ABI's

ERC721MintableComplete: eth-contracts/build/contracts/ERC721MintableComplete.json
SquareVerifier: eth-contracts/build/contracts/SquareVerifier.json
SolnSquareVerifier: eth-contracts/build/contracts/SolnSquareVerifier.json

OpenSea MarketPlace Storefront link

Project requirements

ERC721

Completes the boilerplate ERC721 Mintable Contract in ERC721Mintable.sol - 🎉
Writes and passes the test cases in TestERC721Mintable.js - 🎉
Writes and passes the test cases in 'TestSquareVerifier.js' - 🎉
Writes and passes the test cases in TestSolnSquareVerifier.js - 🎉

Notes: SquareVerifier - A Contract to verify tx generate by zokrates

Notes: SolnSquareVerifier - A Contract to make sure a solution can be added and can mint

Zokrates

Completes the Zokrates proof in square.code by adding the variable names in square.code - 🎉

    zokrates compile -i square.code
    zokrates setup
    zokrates compute-witness -a 337 113569
    zokrates generate-proof
    zokrates export-verifier

Completes test contract in SolnSquareVerifier.sol - 🎉
Writes and passes the test cases in 'TestSolnSquareVerifier.js' - 🎉

OpenSea Marketplace

List ERC721/ ZoKrates tokens & complete transactions on market place - 🎉

Deployment

Deploys ERC721 contracts with Zokrates integration - 🎉

How to tutiorial

How to test the code

npm install
cd eth-contracts
truffle test

How to deploy to Rinkeby network

truffle migrate --network rinkeby

How to create a new Zokrates solution

~/zokrates compute-witness -a {num_1} {num_1 * num_1}
~/zokrates generate-proof

and2352000 / Capstone_Real_Estate_Marketplace