Branta Zero Knowledge Sendside Integration

[keith-gardner]

Describe the feature

Using Zeus, I would like the wallet to auto-verify onchain destinations for QR codes when the business/receiver is running Branta, for zero-knowledge only.

Privacy Implications:

• IP Address is shown to Branta server
• No other data is seen by Branta.

QR Format

On a QR, when branta_id and branta_secret are present, query Branta Server.

• branta_id sent to Branta.
• Branta payload returns confirmed destination for businesses running Branta (listed here https://www.branta.pro/network)

bitcoin:BC1QDTZGWE39CUN8ZW8RKQ5VSZDYQJHQXNZMX59S8E?amount=0.000307&branta_id=LZ5YL4kNufQDrMp1Bp8WaWGZTNlrYLw1HFc8zKIm4tsGwYG8zHVpV6I/p15O8sktkIoVvTRGcqsPUENPYTmKpo/Yb5fkiw==&branta_secret=b271c0b1-b3c4-47d5-a723-4108bbe28f09

Example

Using Branta JS SDK, query Branta with getZKPayment, to receive a response.

If adding the SDK as a dependency is undesirable, using the raw API is straightforward as well: API

UX

(to do, render business name + image optional)

[kaloudis]

new params make integration more tolerable here for sure. will give this some thought

[keith-gardner]

Sounds great @kaloudis - just made a note that SDK is available, or can go zero-dependency and use the raw API to minimize package.json surface area

[keith-gardner]

Reference Examples:

Arkade Money Wallet

• PR: Branta integration arkade-os/wallet#490
• Wallet https://arkade.money

Zap Cooking

• PR: QR Scan + Branta Verify zapcooking/frontend#276
• Wallet: https://zap.cooking/wallet

[keith-gardner]

https://second.tech send side reference: https://gitlab.com/ark-bitcoin/labs/bark-web/-/merge_requests/5/diffs