Supply Chain The contract address: 0x4a606B8AAbb1B30851B881f436e8373eBf356Eac No external libraries where used, only the internal Roles library IPFS address of DApp: dapp Truffle v5.1.24 (core: 5.1.24) Solidity v0.5.16 (solc-js) Node v12.16.3 Web3.js v1.2.1 Activity Diagram Sequence Diagram State Diagram Class (Data Model)