With #cashu on nostr you don't even have to ask for any address, strictly speaking.
You can just lock ecash to anyone's pubkey and if you publish that on a relay that the other party sees and has access to(eg his inbox relays) then it's done. The money is there to be claimed, only spendable by that person.
Now, of course this is better UX if the recipient has published Mint preferences on nostr (like a LN address) because that's explicit trust in that Mint. In [SatShoot](https://satshoot.com) we only let parties pay each other with Cashu if recipient has this "preferred Mint List" event(kind10019) published.
But all that said, you indeed can prove that Cashu works in a *permissionless* way with nostr.
And btw, this can work if sender and recipient don't have overlapping Mints, or the recipient only has LN wallet. LN bridges that gap between the Mints and all of the Lightning network. I ask for a LN invoice from destination, and "melt" my ecash in exchange for payment of the LN invoice by my Mint.
Magic.
Five
npub16p…kfhdw
2025-03-19 06:17:34
in reply to nevent1q…argr
Author Public Key
npub16p8v7varqwjes5hak6q7mz6pygqm4pwc6gve4mrned3xs8tz42gq7kfhdwPublished at
2025-03-19 06:17:34Event JSON
{
"id": "03c014d8251c69d1c51ccc6c3f78646a878ed524cec31a978ab2863e83d2efaf",
"pubkey": "d04ecf33a303a59852fdb681ed8b412201ba85d8d2199aec73cb62681d62aa90",
"created_at": 1742365054,
"kind": 1,
"tags": [
[
"e",
"4722a58e1e166f21a986678116098e218060a3e0030b6826177461dddeb16ab0",
"",
"root"
],
[
"p",
"c4eabae1be3cf657bc1855ee05e69de9f059cb7a059227168b80b89761cbc4e0"
],
[
"p",
"eab0e756d32b80bcd464f3d844b8040303075a13eabc3599a762c9ac7ab91f4f"
],
[
"t",
"cashu"
],
[
"r",
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]
],
"content": "With #cashu on nostr you don't even have to ask for any address, strictly speaking. \nYou can just lock ecash to anyone's pubkey and if you publish that on a relay that the other party sees and has access to(eg his inbox relays) then it's done. The money is there to be claimed, only spendable by that person.\n\nNow, of course this is better UX if the recipient has published Mint preferences on nostr (like a LN address) because that's explicit trust in that Mint. In [SatShoot](https://satshoot.com) we only let parties pay each other with Cashu if recipient has this \"preferred Mint List\" event(kind10019) published.\n\nBut all that said, you indeed can prove that Cashu works in a *permissionless* way with nostr. \nAnd btw, this can work if sender and recipient don't have overlapping Mints, or the recipient only has LN wallet. LN bridges that gap between the Mints and all of the Lightning network. I ask for a LN invoice from destination, and \"melt\" my ecash in exchange for payment of the LN invoice by my Mint.\n\nMagic.",
"sig": "c384806b92bc1b1342d42fd05ea8b5b801062c540cd35207982cfd7ea340095e2c6549ba291a8c1b272fa21bbf12f972409141e851db1418a9eb600ca9af03e6"
}