Sync preferences via nsec

[keith-gardner]

Overview

In Branta, two types of data are stored across sessions, locally on the users computer:

Wallets

Users add Wallets to their local app which (on mac) are saved under: /Users/satoshi/Library/Application Support/Branta/wallet.json

History

As the user makes bitcoin transaction, addresses, xpubs, and npubs (if enabled) are saved under: /Users/satoshi/Library/Application Support/Branta/history.json

This ticket is to allow the user to sync these settings across different computers using NOSTR. The users nsec must be used for encryption/decryption.

Implementation

This ticket does not require "production-ready" code.
Acceptable submissions will include a basic functioning proof-of-concept which supports the flow:

1. User copies a valid nsec into their clipboard
2. The Branta clipboard UI will show a small button "Sync via NOSTR"
3. The payload will be encrypted and stored to a relay
4. On a new computer, the user copies their nsec, and Branta shows a button: "Pull Branta data from NOSTR?"
5. User clicks yes, and the application is synced.

Details

history.json and wallet.json use Safe Storage API.

Also see: https://github.com/BrantaOps/branta-core/blob/main/app/lib/storage.ts

Bounty

See Lightning Bounties

[aliraza556]

Hi @keith-gardner, could you please provide more details/explanation?

[joelklabo]

Opened draft PR with a basic PoC for Nostr nsec sync: https://github.com/BrantaOps/core/pull/171\n\nFlow: copy nsec -> Sync via NOSTR (push); on another machine copy nsec -> Pull (overwrite).