Using LNURL

Interacting with a LNURL endpoint consists of two steps:

1. Parse the LNURL string using parse(lnurl_url).await. This returns a Result<InputType>. The specific InputType you receive will tell you what kind of endpoint this is, as well as give you the relevant endpoint parameters.
2. Call the corresponding service method. For example, for LNURL-pay, that is LiquidSdk::lnurl_pay().