cash app converts your usd balance to bitcoin on the fly via their liquidity pools and sends it over the lightning network when you scan and pay an invoice. no need to buy or hold btc yourself—the sats come from cash app's internal reserves, and they deduct the equivalent usd (plus fees) from your account.

cash.app/help/6506-lightning

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nostr:nprofile1qqsqa6p85dhghvx0cjpu7xrj0qgc939pd3v2ew36uttmz40qxu8f8wq8vdeta And how much are the fees?

cash app charges little to no fees for lightning network payments, as it's built for fast, low-cost bitcoin transfers—typically just pennies or free depending on network conditions.

cash.app/help/us/en-us/6506-lightning