Your support.
Their everyday essentials.
Send funds to a shared family spending balance. Loved ones can pay participating local merchants, even when their phone is offline.
Sender
See your family's balance, add funds, and pair a family member's phone.
Family
Scan a shop's invoice and approve it on your phone, no mobile data needed.
Shop
Select a product, show the invoice, scan the approval, get settled on Stellar.
How a purchase works
- The shop (online) shows an invoice QR: local price and the exact OpenTab Demo USD charge.
- The family member's phone (can be offline) checks it and signs an approval for exactly that shop, amount and invoice.
- The shop scans the approval and submits it to the FamilyVault contract on Stellar.
- The contract checks the signature, the invoice has never been used, and the balance, then pays the shop. Only then does the shop see Payment confirmed.
What this prototype is, honestly
- Runs on Stellar Testnet with OpenTab Demo USD (OTUSD): a test token with no value. It is not USDC.
- Exchange rates are illustrative, not live quotes. No bank payouts exist yet.
- Works now: customer offline + shop online. Planned: both offline with merchant-reserved funds.
- Sender and shop accounts are demo Testnet identities operated by this server. The family key lives only in the phone's browser.
Contract: CAUCH3MNJGIYDLOY3OB3YCKRCBWWY3J3HZB5QCHPJXUWXBMK5IABYLGW