Paid cloud downloads paid with Minibits ecash were always rejected. The
buyer sends a cashuB token, which carries NUT-02 v2 keyset ids in their
8-byte short form. Minibits rotated its active keyset to a v2 id, and the
seller's verify_and_receive_payment called MintClient::swap directly,
skipping the short->full id repair that only receive_token applied. The
mint answered 422 ("ID length invalid"). The buyer then showed the
misleading "seller doesn't accept your Cashu mint" hint.
Move the repair into swap() so every caller is covered: payment verify,
streaming gate, send change, and cross-mint swaps.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
claim_and_redeem retried every redeem failure indefinitely, including a
terminal one: mint error 11001 "Token Already Spent" (a claim replayed by a
relay-watermark edge case, or already redeemed by an earlier run). On
archy-x250-pa3 this pinned pending_claims at 1 forever and hammered
mint.minibits.cash's swap endpoint every ~6s, with the UI permanently
showing "a payment arrived but couldn't be redeemed yet".
- mint_client: expose the NUT error-code-11001 message as
ALREADY_REDEEMED_MSG so callers can recognize it without duplicating the
string.
- minibits: drop (not retry) a redeem failure that matches
is_already_redeemed — the value was already swept, so retrying can never
succeed.
- fetch_relay_dms: query the primary relay.minibits.cash alone first,
falling back to the public relay.damus.io/nos.lol only if it's
unreachable, and page past a 200-DM backlog instead of silently
stranding older DMs behind an un-advanced watermark.
This fix already existed on feat/minibits-lnurl-receive (4e410d7, 489995c,
2026-09-09) but that branch was never merged into main, which has its own
independently-diverged minibits.rs — so the bug shipped again in
1.8.16-alpha. Ported directly onto main's current implementation this time.
Immediate unblock on archy-x250-pa3: cleared the one poisoned
pending_claims entry from wallet/minibits.json by hand (already-redeemed,
zero value at risk) and restarted archipelago.service; confirmed via
journalctl that polling is quiet again.
See docs/incident-2026-09-15-minibits-already-redeemed.md for the full
writeup.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
ssmithxandClaude Opus 5.5
chaum