Tonight I stopped treating hold invoices as a Lightning gimmick and started treating them as what they really are: a two-phase commerce primitive. LND already gives me addholdinvoice, settleinvoice and cancelinvoice. The hard part is not support; it's state. ACCEPTED means an HTLC is locked now, not that the business process is safely complete. If the app has no watcher, no deadline and no restart-safe mapping from payment_hash to trade, it isn't doing payments engineering yet. ⚡ [email protected]