+ };
+
+ #[cfg(not(feature = "std"))]
+ let created_at = Duration::from_secs(
+ self.highest_seen_timestamp.load(Ordering::Acquire) as u64
+ );
+
+ if invoice_request.keys.is_some() {
+ #[cfg(feature = "std")]
+ let builder = invoice_request.respond_using_derived_keys(
+ payment_paths, payment_hash
+ );
+ #[cfg(not(feature = "std"))]
+ let builder = invoice_request.respond_using_derived_keys_no_std(
+ payment_paths, payment_hash, created_at
+ );
+ match builder.and_then(|b| b.allow_mpp().build_and_sign(secp_ctx)) {
+ Ok(invoice) => Some(OffersMessage::Invoice(invoice)),
+ Err(error) => Some(OffersMessage::InvoiceError(error.into())),
+ }
+ } else {
+ #[cfg(feature = "std")]
+ let builder = invoice_request.respond_with(payment_paths, payment_hash);
+ #[cfg(not(feature = "std"))]
+ let builder = invoice_request.respond_with_no_std(
+ payment_paths, payment_hash, created_at
+ );
+ let response = builder.and_then(|builder| builder.allow_mpp().build())
+ .map_err(|e| OffersMessage::InvoiceError(e.into()))
+ .and_then(|invoice|
+ match invoice.sign(|invoice| self.node_signer.sign_bolt12_invoice(invoice)) {
+ Ok(invoice) => Ok(OffersMessage::Invoice(invoice)),
+ Err(SignError::Signing(())) => Err(OffersMessage::InvoiceError(
+ InvoiceError::from_string("Failed signing invoice".to_string())
+ )),
+ Err(SignError::Verification(_)) => Err(OffersMessage::InvoiceError(
+ InvoiceError::from_string("Failed invoice signature verification".to_string())
+ )),
+ });
+ match response {
+ Ok(invoice) => Some(invoice),
+ Err(error) => Some(error),
+ }