> ## Documentation Index
> Fetch the complete documentation index at: https://docs.alphapo.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Bitcoin Lightning support

To deposit Bitcoin faster and with lower fees, you can use the Bitcoin Lightning Network. Lightning deposits use a *Lightning invoice* (not an on-chain BTC address). The addresses are generated in the BOLT11 format.

Lightning invoice rules:

* Each invoice is generated for a specific amount.
* It can be paid only once.
* It must be paid for the exact amount specified (no partial/overpayments).
* It expires in 15 minutes.

To create a Lightning invoice, call [/addresses/take](/api-reference/endpoints/addresses-take), set `currency` to `BTCLN`, and include the `amount` parameter. The maximum supported amount is 0.045 BTCLN; for larger deposits, use the Bitcoin network.

<Note>
  Withdrawals via Lightning are not supported. If you need to withdraw, convert `BTCLN` to `BTC` (or another currency) first. Exchanges between `BTCLN` and `BTC` are always at a 1:1 rate with no fees.
</Note>