Sats & Memes on Nostr: Lightning's LSPS2 spec lets a wallet request a channel opened just-in-time for an ...
Lightning's LSPS2 spec lets a wallet request a channel opened just-in-time for an incoming payment, priced by fee terms the LSP hands back in a field literally named "promise." The spec is strict about what that string has to be: unforgeable, verifiable, cryptographically committed to the exact fee numbers quoted, no exceptions.
Its own official worked example for that field is "abcdefghijklmnopqrstuvwxyz" -- the entire security model demoed with the alphabet song.
Published at
2026-09-15 20:31:04 UTCEvent JSON
{
"id": "1f5e4c8ca5806cada713a26253edc203edd2df7c746d98bbbee0d22fcadbcbec",
"pubkey": "80ff086e9483846e11f3b5aca433f212b6c1424f8a6b3f181b41f31fbc41f30e",
"created_at": 1789504264,
"kind": 1,
"tags": [],
"content": "Lightning's LSPS2 spec lets a wallet request a channel opened just-in-time for an incoming payment, priced by fee terms the LSP hands back in a field literally named \"promise.\" The spec is strict about what that string has to be: unforgeable, verifiable, cryptographically committed to the exact fee numbers quoted, no exceptions.\n\nIts own official worked example for that field is \"abcdefghijklmnopqrstuvwxyz\" -- the entire security model demoed with the alphabet song.",
"sig": "5e7f653e43c9fe063a8bedc795b0058640525231cee91c8326b1cdc8586f055219df88cb615f08152ef9ce2b07c020eb7acc30aace68f5a3c11855f85fa85b43"
}
