The capstone will build upon the knowledge you have gained in the course in order to build a decentralized housing product.
- Remix - Solidity IDE
- Visual Studio Code
- Truffle Framework
- Ganache - One Click Blockchain
- Open Zeppelin
- Interactive zero knowledge 3-colorability demonstration
- Docker
- ZoKrates
- Run Ganache at port 7545;
- In terminal, run truffle test test/TestERC721Mintable.js
- File TestERC721Mintable.js was updated so that 4 tokens were minted from account_one and 6 tokens were minted from account_two
- Tests check for:
- total supply should be 10;
- balance for account_two should be 6;
- URI for token 1 should be https://s3-us-west-2.amazonaws.com/udacity-blockchain/capstone/1
- owner of token 1 was transfered from account_one to account_two;
- Only contract owner can mint token;
- All tests passed;
- In terminal, run truffle test test/TestSquareVerifier.js;
- Proof was read from proof.json file;
- Tests check for:
- verifyTx returns true if the correct proof was used;
- vefigyTx returns false if the proof was modified.
- Both tests passed;
- In terminal, run truffle test test/TestSolnSquareVerifier.js;
- Tests check for:
- After calling addSolution for 10 times, the total solutions increased by 10;
- After minted 4 tokens, total supply increased by 4;
- Both tests passed.
- The App is able to add solution and mint token. The total minted token number matched with expected number
Created a different Metamask wallet and tokens listed in OpenSea can be purchased by a different address
https://testnets.opensea.io/collection/galaxy-propertybeyondearth
0x535D4d20251316076450bA9BEEb712f3844f74bB
[ { "inputs": [ { "internalType": "address", "name": "verify_address", "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": 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": "oldOwner", "type": "address" }, { "indexed": false, "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "TransferOwnership", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "setterAddress", "type": "address" } ], "name": "paused", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "bytes32", "name": "solutionkey", "type": "bytes32" }, { "indexed": false, "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "indexed": false, "internalType": "address", "name": "tokenAddress", "type": "address" } ], "name": "solution_add", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "setterAddress", "type": "address" } ], "name": "unpaused", "type": "event" }, { "constant": true, "inputs": [ { "internalType": "bytes32", "name": "_myid", "type": "bytes32" }, { "internalType": "string", "name": "_result", "type": "string" } ], "name": "__callback", "outputs": [], "payable": false, "stateMutability": "pure", "type": "function" }, { "constant": true, "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": "pure", "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": "", "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": [], "name": "getterOwner", "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": true, "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "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": [], "name": "pause", "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" } ], "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": [], "name": "sqrVerifier", "outputs": [ { "internalType": "contract Verifier", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "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": "", "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": [], "name": "unpause", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "address", "name": "tokenAddress", "type": "address" } ], "name": "addSolution", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "totalSolution", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "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": false, "inputs": [ { "internalType": "uint256", "name": "tokenId", "type": "uint256" }, { "internalType": "address", "name": "tokenAddress", "type": "address" }, { "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": "mint", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ]