if you can pay lightning invoices using nostr:npub1cashappn03s3cl2ljsdntv0v28e2um5lgx4vjctqjt23pcwzjhsqmtdg5l cash balance, you could use this to buy bitcoin to self custody by runnung your own ln⚡️ node *for free*.
are there zero routing fees when paying this way? nostr:npub17q66c7yr5thrc9vscy2u2m7t50chjvvdwtkwp6qap6035ftv46xqmg3few