combattardigrade/eth_real_estate_marketplace

Udacity Blockchain Capstone

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

SolnSquareVerifier (Rinkeby)

0x998E9fE48Af2E8Bc1a58452fd2cFE6915A9180D6

Verifier (Rinkeby)

0x6CF0354C355f70D5b1Ad57BB6a460AD560134DCe

OpenSea MarketPlace Storefront

https://testnets.opensea.io/collection/erc721-token

Open Sea Transactions

https://testnets.opensea.io/assets/0x998e9fe48af2e8bc1a58452fd2cfe6915a9180d6/1/ https://testnets.opensea.io/assets/0x998e9fe48af2e8bc1a58452fd2cfe6915a9180d6/2/ https://testnets.opensea.io/assets/0x998e9fe48af2e8bc1a58452fd2cfe6915a9180d6/3/ https://testnets.opensea.io/assets/0x998e9fe48af2e8bc1a58452fd2cfe6915a9180d6/9/ https://testnets.opensea.io/assets/0x998e9fe48af2e8bc1a58452fd2cfe6915a9180d6/11/

ABI (SolnSquareVerifier)

"abi": [ { "inputs": [ { "internalType": "address", "name": "v", "type": "address" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "approved", "type": "address" }, { "indexed": true, "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "Approval", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "operator", "type": "address" }, { "indexed": false, "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "ApprovalForAll", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "sender", "type": "address" } ], "name": "Paused", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "uint256", "name": "index", "type": "uint256" }, { "indexed": false, "internalType": "address", "name": "account", "type": "address" } ], "name": "SolutionAdded", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "from", "type": "address" }, { "indexed": true, "internalType": "address", "name": "to", "type": "address" }, { "indexed": true, "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "Transfer", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "sender", "type": "address" } ], "name": "Unpaused", "type": "event" }, { "constant": false, "inputs": [ { "internalType": "bytes32", "name": "_myid", "type": "bytes32" }, { "internalType": "string", "name": "_result", "type": "string" } ], "name": "__callback", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "bytes32", "name": "_myid", "type": "bytes32" }, { "internalType": "string", "name": "_result", "type": "string" }, { "internalType": "bytes", "name": "_proof", "type": "bytes" } ], "name": "__callback", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "approve", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" } ], "name": "balanceOf", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "baseTokenURI", "outputs": [ { "internalType": "string", "name": "uri", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "getApproved", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "address", "name": "operator", "type": "address" } ], "name": "isApprovedForAll", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "mint", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "name", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "owner", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "ownerOf", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "safeTransferFrom", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "bytes", "name": "_data", "type": "bytes" } ], "name": "safeTransferFrom", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "bool", "name": "approved", "type": "bool" } ], "name": "setApprovalForAll", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "bytes4", "name": "interfaceId", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "symbol", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "index", "type": "uint256" } ], "name": "tokenByIndex", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "address", "name": "owner", "type": "address" }, { "internalType": "uint256", "name": "index", "type": "uint256" } ], "name": "tokenOfOwnerByIndex", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "tokenURI", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "from", "type": "address" }, { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" } ], "name": "transferFrom", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "bool", "name": "isPaused", "type": "bool" } ], "name": "updateStatus", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "uint256", "name": "index", "type": "uint256" }, { "internalType": "address", "name": "account", "type": "address" }, { "internalType": "bytes32", "name": "key", "type": "bytes32" } ], "name": "addSolution", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "to", "type": "address" }, { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "uint256[2]", "name": "a", "type": "uint256[2]" }, { "internalType": "uint256[2][2]", "name": "b", "type": "uint256[2][2]" }, { "internalType": "uint256[2]", "name": "c", "type": "uint256[2]" }, { "internalType": "uint256[2]", "name": "input", "type": "uint256[2]" } ], "name": "verifyAndMint", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256[2]", "name": "a", "type": "uint256[2]" }, { "internalType": "uint256[2][2]", "name": "b", "type": "uint256[2][2]" }, { "internalType": "uint256[2]", "name": "c", "type": "uint256[2]" }, { "internalType": "uint256[2]", "name": "input", "type": "uint256[2]" } ], "name": "getVerifierKey", "outputs": [ { "internalType": "bytes32", "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "pure", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "bytes32", "name": "key", "type": "bytes32" } ], "name": "getUniqueSolution", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" } ]

Install

This repository contains Smart Contract code in Solidity (using Truffle), tests (also using Truffle)

To install, download or clone the repo, then:

npm install
truffle compile

Tests

To run truffle tests:

npm install
cd eth-contracts
truffle test TestERC721Mintable.js
truffle test TestSolnSquareVerifier.js
truffle test TestSquareVerifier.js

Deploy

To deploy the contracts

truffle compile
truffle migrate --network rinkeby --reset

.env file

ETH_CHAIN_ID='4'
ETH_CHAIN_NAME='rinkeby'
ETH_PUBLIC_KEY='<YOUR_ETH_PUBLIC_KEY>'
ETH_PRIVATE_KEY='<YOUR_ETH_PRIVATE_KEY>'
HTTP_PROVIDER='<YOUR_HTTP_PROVIDER>'
CONTRACT_ADDRESS='<SolnSquareVerifier_CONTRACT_ADDRESS>'

Mint Tokens

To mint new tokens create a .env file with the details described above. Then, modify the tokenId variable in scripts/mintToken.js with the corresponding ID & proof you want to use. Finally, run the following command:

node scripts/mintToken.js

Project Resources

• Remix - Solidity IDE
• Visual Studio Code
• Truffle Framework
• Ganache - One Click Blockchain
• Open Zeppelin
• Interactive zero knowledge 3-colorability demonstration
• Docker
• ZoKrates