The **symbol‑qr‑library** is a Node.js library that lets developers generate QR codes for the Symbol blockchain—covering transaction requests, addresses, contacts, mnemonics, private‑key backups, and arbitrary custom objects—so they can be displayed or scanned in wallets, UIs, or mobile apps. It’s aimed at Symbol SDK developers who need to embed blockchain‑specific QR data (e.g., for transaction preparation, address sharing, or secure key backup) into their decentralized applications.