Two things:
1. Platform fee address → [email protected] (verified live:
allowsNostr + nostrPubkey, 1-sat min, working callback). coinos is
Nostr-native and PUBLISHES zap receipts, unlike strike.me whose flaky LNURL
+ never-published receipts caused the platform-share pay timeouts and the
missing zap tallies. The 30% platform fee is unchanged — only the rail.
2. Double-pay guard (bug found while diagnosing): on a `pay_invoice` timeout,
nwcClient's nip44->nip04 encryption-fallback resent the request — but a
timeout is ambiguous (the wallet may already be paying), so the resend
could DOUBLE-SPEND. shouldRetryWithFallback now refuses to auto-resend any
spending method (pay_invoice/pay_keysend/multi_pay_*) on timeout; read-only
methods and explicit unsupported-encryption rejections (wallet never paid)
stay retryable. The manual "Send again" retry is the safe path for a real
payment timeout.
Tests: tests/nwc-pay-timeout-no-double-spend.test.mjs (4). Lint + build green.
Co-Authored-By: Claude Fable 5 <[email protected]>
