StarNotary Decentralized Aapp Truffle v5.1.31 (core: 5.1.31) Solidity v0.5.16 (solc-js) Node v10.15.3 Web3.js v1.2.1 openZeppelin-solidity version: 2.1.2 ERC-721 Token Name: GfredStar ERC-721 Token Symbol: GFR Token Address Rinkeby: 0xd8bb1b70a2a542f71a337645c2ec036b4d20c04c