Bitcoin over Bluetooth is here.

Bitchat now lets Android and iPhone users send BTC directly, phone to phone, using built-in Cashu e-cash wallets.

No internet needed. Just instant, untraceable digital cash.

Via nostr:npub12rv5lskctqxxs2c8rf2zlzc7xx3qpvzs3w4etgemauy9thegr43sf485vg

https://video.nostr.build/73c660a5ad9cf62963a2bf7562189483f0e6540f73f59cbb9a3a357d2b697bd8.mp4

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Discussion

It would be good to have certainty on this "no internet" claim, have seen it written that one of the two parties in the transaction must have internet.

I thought receiver needs internet to swap the tokens with the mint to be safe from double spending? Or am I wrong about how Cashu works?

" A digital bearer token that is stored on a user's device, very similar to physical cash."

https://cashu.space/

and:

"Users can redeem their ecash tokens for bitcoin at any time."

btw:

"On April 22, 1994, Richard Nixon, the 37th president of the United States and the 36th vice president, died."

Yes I know what ecash is. Clearly you can send a token without internet but there's no way to guarantee the sender has burned their copy, therefore the receiver would typically swap with the mint to prevent double spending, which requires internet.

I suppose you could alternatively have the sender convert lock the token with p2pk, but again that requires internet.

Ok looks like I wasn't missing anything. Still cool though.

nostr:note1y70ps5wrf3rglx8yrufhtwgz6khrnx3dxq6pcn5nj0a5gktzk48qwlhrqs

this is cool

but ecash is not Bitcoin.

its "redeemable for Bitcoin."

Pretending lightning is Bitcoin doesn't hit hard enough anymore, they have to pretend ecash is Bitcoin now too 😢