Скачать или смотреть Build a Blockchain Notary Service with Node.js & Polygon (Proof of Existence) |

#flutter #fluttertutorial #flutterwidgets #NodeJS #Web3 #Polygon #Backblaze #FullStack #BlockchainDevelopment #Startup

In this video, I show you how to build a 'Digital Notary' service for your file-sharing app. We'll use Node.js to stream a file from Backblaze B2, hash it, and stamp that hash on the Polygon blockchain to create immutable proof of existence.

Tech Stack: ⚡ Node.js & Express 📦 Backblaze B2 (Cloud Storage) 🔗 Polygon (Blockchain) 🛠️ Ethers.js

📺 Get the latest videos on my channel:    / @ibuux  
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📕 Materials/References:
Node js: https://nodejs.org/en
Flutter: https://flutter.dev/
Bloc: https://pub.dev/packages/flutter_bloc
Figma: https://www.figma.com/

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