Blockchain-Capstone

Capstone project of Udacity Blockchain Developer Nanodegree to build a decentralized housing service.

Info of project

• Truffle v5.0.20 (core: 5.0.20)
• Solidity v0.5.0 (solc-js)
• Node v10.16.0
• Web3.js v1.0.0-beta.37

Install dependencies

$ npm install

Compile

$ truffle compile

Test

$ truffle Test

Deploy Contract to Rinkeby:

$ truffle migrate --reset --network rinkeby

ERC721Mintable Smart contract

Contract Address: 0x2E5463e254b69465Bca6dDa0Ecac94691462932b

Verifier Smart contract

Contract Address: 0x3D5C9872e45e8d7999fb98E18DE7c14dd80f65EE

SolnSquareVerifier Smart contract

Contract Address: 0x1a23A475b752548EA33c2d6cFaa5C06f56b28e04

OpenSea marketplace

https://rinkeby.opensea.io/assets/0x2E5463e254b69465Bca6dDa0Ecac94691462932b/1

https://rinkeby.opensea.io/accounts/0xf75b4075cbbd0540e4739eed90ae8cabf2775ef8

Token Storefront marketplace

https://rinkeby.opensea.io/collection/house-token-v3-1

ERC721Mintable abi

 "abi": [
    {
      "constant": true,
      "inputs": [
        {
          "name": "interfaceId",
          "type": "bytes4"
        }
      ],
      "name": "supportsInterface",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "name",
      "outputs": [
        {
          "name": "",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "getApproved",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "approve",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "totalSupply",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "from",
          "type": "address"
        },
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "transferFrom",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "_myid",
          "type": "bytes32"
        },
        {
          "name": "_result",
          "type": "string"
        }
      ],
      "name": "__callback",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "owner",
          "type": "address"
        },
        {
          "name": "index",
          "type": "uint256"
        }
      ],
      "name": "tokenOfOwnerByIndex",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "_myid",
          "type": "bytes32"
        },
        {
          "name": "_result",
          "type": "string"
        },
        {
          "name": "_proof",
          "type": "bytes"
        }
      ],
      "name": "__callback",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [],
      "name": "unpause",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "from",
          "type": "address"
        },
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "safeTransferFrom",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "index",
          "type": "uint256"
        }
      ],
      "name": "tokenByIndex",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "ownerOf",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "owner",
          "type": "address"
        }
      ],
      "name": "balanceOf",
      "outputs": [
        {
          "name": "",
          "type": "uint256"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "baseTokenUri",
      "outputs": [
        {
          "name": "",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [],
      "name": "pause",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "owner",
      "outputs": [
        {
          "name": "",
          "type": "address"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [],
      "name": "symbol",
      "outputs": [
        {
          "name": "",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "approved",
          "type": "bool"
        }
      ],
      "name": "setApprovalForAll",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "from",
          "type": "address"
        },
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "tokenId",
          "type": "uint256"
        },
        {
          "name": "_data",
          "type": "bytes"
        }
      ],
      "name": "safeTransferFrom",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "tokenURI",
      "outputs": [
        {
          "name": "",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "owner",
          "type": "address"
        },
        {
          "name": "operator",
          "type": "address"
        }
      ],
      "name": "isApprovedForAll",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "newOwner",
          "type": "address"
        }
      ],
      "name": "transferOwnership",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "inputs": [
        {
          "name": "_name",
          "type": "string"
        },
        {
          "name": "_symbol",
          "type": "string"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "constructor"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "from",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "to",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "Transfer",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "owner",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "approved",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "Approval",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": true,
          "name": "owner",
          "type": "address"
        },
        {
          "indexed": true,
          "name": "operator",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "approved",
          "type": "bool"
        }
      ],
      "name": "ApprovalForAll",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [],
      "name": "Paused",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [],
      "name": "Unpaused",
      "type": "event"
    },
    {
      "anonymous": false,
      "inputs": [
        {
          "indexed": false,
          "name": "from",
          "type": "address"
        },
        {
          "indexed": false,
          "name": "to",
          "type": "address"
        }
      ],
      "name": "TransferredOwnership",
      "type": "event"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "to",
          "type": "address"
        },
        {
          "name": "tokenId",
          "type": "uint256"
        }
      ],
      "name": "mint",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    }
  ]

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.

Authors

• Yaw Botwe - Blockhain engineer - github profile

License

This project is licensed under the MIT License

Project Resources

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