A real state NFT using ZoKrates zk-SNARKs for verification.
Capstone project for Udacity Blockchain Nanodegree.
Install node dependencies
npm install
Run the tests with truffle
truffle test
Run the truffle development node
truffle develop
Deploy the contracts
truffle(develop)> migrate
Run zokrates using docker
docker run -v <path_to_project>/zokrates/code:/home/zokrates/code -ti zokrates/zokrates /bin/bash
Move to the code/square directory
cd code/square
Compute a witness (a solution for a * a = b)
zokrates compute-witness -a <a> <b>
zokrates compute-witness -a 3 9
Generate the proof
zokrates generate-proof
Run the mint script with a token ID
truffle exec scripts/mint.js <tokenId> --network develop
Contract address on Goerli testnet: 0xf00F84D1A4Aeff3f3b450c77Fd9fC46fF9Ed0D82
View on Etherscan: https://goerli.etherscan.io/address/0xf00F84D1A4Aeff3f3b450c77Fd9fC46fF9Ed0D82#code
Opensea Marketplace: https://testnets.opensea.io/collection/real-state-token-djmckpt39b
{
"inputs": [
{
"internalType": "address",
"name": "verifierAddress",
"type": "address"
}
],
"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": "oldOwner",
"type": "address"
},
{
"indexed": false,
"internalType": "address",
"name": "newOwner",
"type": "address"
}
],
"name": "OwnerTransfered",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "address",
"name": "account",
"type": "address"
}
],
"name": "Paused",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "bytes32",
"name": "solutionKey",
"type": "bytes32"
},
{
"indexed": false,
"internalType": "address",
"name": "account",
"type": "address"
},
{
"indexed": false,
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"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": "account",
"type": "address"
}
],
"name": "Unpaused",
"type": "event"
},
{
"inputs": [
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "approve",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "owner",
"type": "address"
}
],
"name": "balanceOf",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [],
"name": "baseTokenURI",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "getApproved",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"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"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "mint",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [],
"name": "name",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [],
"name": "owner",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "ownerOf",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "safeTransferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"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": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "bool",
"name": "approved",
"type": "bool"
}
],
"name": "setApprovalForAll",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "bool",
"name": "pause",
"type": "bool"
}
],
"name": "setPaused",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "bytes4",
"name": "interfaceId",
"type": "bytes4"
}
],
"name": "supportsInterface",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [],
"name": "symbol",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "uint256",
"name": "index",
"type": "uint256"
}
],
"name": "tokenByIndex",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"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"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "tokenURI",
"outputs": [
{
"internalType": "string",
"name": "",
"type": "string"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [],
"name": "totalSupply",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function",
"constant": true
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
}
],
"name": "transferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "newOwner",
"type": "address"
}
],
"name": "transferOwnership",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "tokenId",
"type": "uint256"
},
{
"components": [
{
"components": [
{
"internalType": "uint256",
"name": "X",
"type": "uint256"
},
{
"internalType": "uint256",
"name": "Y",
"type": "uint256"
}
],
"internalType": "struct Pairing.G1Point",
"name": "a",
"type": "tuple"
},
{
"components": [
{
"internalType": "uint256[2]",
"name": "X",
"type": "uint256[2]"
},
{
"internalType": "uint256[2]",
"name": "Y",
"type": "uint256[2]"
}
],
"internalType": "struct Pairing.G2Point",
"name": "b",
"type": "tuple"
},
{
"components": [
{
"internalType": "uint256",
"name": "X",
"type": "uint256"
},
{
"internalType": "uint256",
"name": "Y",
"type": "uint256"
}
],
"internalType": "struct Pairing.G1Point",
"name": "c",
"type": "tuple"
}
],
"internalType": "struct Verifier.Proof",
"name": "proof",
"type": "tuple"
},
{
"internalType": "uint256[2]",
"name": "input",
"type": "uint256[2]"
}
],
"name": "mintToken",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
}
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