Starlight

About

This app created in Flutter is a proof-of-concept demonstrating how Cloud Firestore can be used to create a payment transactions application.

Firebase is for authentication, and Firestore watch listeners (snapshot listeners) are used to listen for updates to the relevant user document as well as transaction documents to facilitate live UI updates.

Data Schema

users collection

• balanceCents: number (int)
• email: string
• lastTxId: string
• uid: string (Firebase auth uid)

transactions collection

• amountCents: number (int)
• fromUid: string (Firebase auth uid)
• fromUsername: string
• timestamp: timestamp
• toUid: string (Firebase auth uid)
• toUsername: string

Notes

The users collection and transactions collection are interdependent for committing balance transfers.

Technologies Used

• Flutter
• Dart
• Firebase SDK
• Cloud Firestore SDK

Screenshots

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