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handle_lnd_createinvoice posted to LND's /v1/invoices with only value/memo, so LND defaulted private to false and returned invoices with empty route_hints. Any node whose only channels are private/unannounced was unpayable through the wallet UI's Receive flow. Diagnosed on archy-x250-mad2, whose only channel (to Olympus by ZEUS) is private with ~40.8k sats usable inbound; three wallet-UI invoices never received an HTLC. Audited every other invoice-creation call site and found a second one with the identical omission: create_invoice, the seller-side/peer-file paid- content flow (content.rs -> handler for paid downloads). Same bug, same fix, wider blast radius than the one-node report suggested -- paid-file sales were unreceivable on private-channel nodes too. Extracted both call sites' invoice_body construction into one shared build_invoice_request_body() that sets private: true unconditionally, and added a unit test pinning that field so neither site can silently drift back to false. private:true is harmless on nodes with public channels -- LND still prefers a direct public route and the hint is just an unused alternate path.