Blockchain Capstone Project - Real Estate MarketPlace

This capstone project builds upon the knowledge gained throughout the course in order to build a decentralized housing product.

Versions

Truffle v5.1.24 (core: 5.1.24)

Node v12.16.3

truffle-compiler: 0.5.1+commit.c8a2cb62.Emscripten.clang

ZoKrates 0.5.2

truffle-hdwallet-provider@1.0.17

Compiler: Solidity - 0.5.5 (solc-js)

Contracts

Rinkeby Contract Address

First the Verifier contract is deployed, then the SolnSquareVerifier contract using the Verifier address.

Verifier - https://rinkeby.etherscan.io/address/0x91eec087857e2666cD6F77a95214FD1d3B4aF825

SolnSquareVerifier - https://rinkeby.etherscan.io/address/0x00A7E913ab81B528eF99F339816B376b1C5835b0

Contract ABI

All contract ABI are in the build folder

OpenSea MarketPlace Storefront https://rinkeby.opensea.io/assets/bkhs-erc721mintabletoken-v2

SolnSquareVerifier.sol

Note: SolnSquareVerifier inherits all other contracts except verifier.sol

Completed contract that inherits the ERC721 token backed through zkSnarks that enhances privacy and scalability.

verifier.sol

Implements Succinct Zero-knowledge proofs (zkSnarks).

Quick Start Deploying to Ganache and Testing

cd into project repro & install modules

cd Blockchain-Capstone-Real-Estate-Marketplace

npm install

Compile Contracts
```
 truffle compile
```
Start ganache (CLI or GUI)
```
 ganache-cli
```

Migrate locally

 ruffle migrate --network development --reset

Testing contracts

Testing ERC721

File: TestERC721Mintable.js

Test minting functionality of tokens and transfer of tokens.

truffle test ./test/TestERC721Mintable.js

Test zkSnarks

File: TestSquareVerifier.js

Verifies zkSnarks is successfully implemented.

truffle test ./test/TestSquareVerifier.js

Testing ERC721 token with zkSnarks

File: TestSolnSquareVerifier.js

Test minting with zkSnarks.

truffle test ./test/TestSolnSquareVerifier.js

Quick Start Deploying to Rinkeby

Make a new project with Infura

Infura: https://infura.io
Setup truffle-config

2.1 set infuraKey

2.2 set mnemonic from metamask within HDWalletProvider

2.3 set rinkeby endpoint within HDWalletProvider

2.4 set from address
Migrate to rinkeby
```
 truffle migrate --network rinkeby
```
Finding ERC721 token on ether-scan

https://rinkeby.etherscan.io/token/0x00a7e913ab81b528ef99f339816b376b1c5835b0
Minting tokens

https://www.myetherwallet.com/interface/interact-with-contract
Finding tokens on rinkeby OpenSea

https://rinkeby.opensea.io/assets/0x00a7e913ab81b528ef99f339816b376b1c5835b0/21
Viewing token Storefront on Opensea

https://rinkeby.opensea.io/assets/bkhs-erc721mintabletoken-v2

assets

Ezeebube5/real-estate-marketplace-blockchain