BTC Shule's avatar
BTC Shule 8 months ago
📍In areas without internet or banking access, we use solutions that meet local needs, like those built on the Cashu protocol. 💡With this tech, offline transactions are possible, like this child buying a donut with SATs at an onboarded shop. 🍩⚡️@calle @Forte11 ⚡🇨🇺 #Bitcoin_for_unbanked

Replies (24)

MoneRogue's avatar
MoneRogue MoneRogue@coinos.io 8 months ago
If you want to get really technical (for all the Bitcoin aficionados out there), you could go to an area with internet, print a bunch of paper wallets in an air-gapped environment, send an exact amount of sats to each paper wallet, and then just use them like Federal Reserve Notes.
hoppe2's avatar
hoppe2 8 months ago
How does eCash solve the double-spending problem in an offline environment? I'm not comfortable just trusting the payer.
3 replies ↓
calle's avatar
calle calle@cashu.me 8 months ago
if you're the merchant and have Internet, you don't need to trust anyone. the payer can remain offline. generally, one party having internet is enough to prevent double spending
1 replies ↓
frphank's avatar
frphank 8 months ago
You can have ecash in any currency, not just sats, right?
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npub1t4cz...895f 8 months ago
The fact that they use an old math notebook for a napkin is crazy!🍯🦡Donut>math
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npub1cj6n...86t6 8 months ago
the opposite could also exist, tho probably less common: vending machine (offline) - customer mobile (online) in that case, customer/sender can create offline verifiable tokens
ynniv's avatar
ynniv ynniv@ynniv.com 8 months ago
This was a specific design goal for my Bitcoin Deposits proposal. Always-online vault pays an invoice based on onion message for the invoice and max fee signed by the deposit private key. Potentially a single NFC tap by an offline customer
rfc's avatar
rfc 8 months ago
His customers are hopefully in there own homes and offices 😂 There isn't a way for an offline sender to lock ecash to an offline receivers public key, right? (assuming sender has the exact tokens denominations needed)
1 replies ↓
rfc's avatar
rfc 8 months ago
This is going to take off unbelievably in Africa, we haven't seen anything yet.
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