/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
/// [`Refund`]: crate::offers::refund::Refund
/// [module-level documentation]: self
/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
/// [`Refund`]: crate::offers::refund::Refund
/// [module-level documentation]: self
pub fn sign<F, E>(self, sign: F) -> Result<Invoice, SignError<E>>
where
F: FnOnce(&Message) -> Result<Signature, E>
pub fn sign<F, E>(self, sign: F) -> Result<Invoice, SignError<E>>
where
F: FnOnce(&Message) -> Result<Signature, E>
/// An invoice may be sent in response to an [`InvoiceRequest`] in the case of an offer or sent
/// directly after scanning a refund. It includes all the information needed to pay a recipient.
///
/// An invoice may be sent in response to an [`InvoiceRequest`] in the case of an offer or sent
/// directly after scanning a refund. It includes all the information needed to pay a recipient.
///
/// [`Offer`]: crate::offers::offer::Offer
/// [`Refund`]: crate::offers::refund::Refund
/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest
/// [`Offer`]: crate::offers::offer::Offer
/// [`Refund`]: crate::offers::refund::Refund
/// [`InvoiceRequest`]: crate::offers::invoice_request::InvoiceRequest