impl Clone on unsigned BOLT12 types

This is required for bindings as passing types from Rust to GC'd
languages can't map the concept of a type that has a lifetime of
the called function but instead needs to clone for safety.

Author: TheBlueMatt

lightning/src/ln/onion_payment.rs

@@ -26,7 +26,7 @@ use crate::prelude::*;
 use core::ops::Deref;
 
 /// Invalid inbound onion payment.
-#[derive(Debug)]
+#[derive(Clone, Debug, Hash, PartialEq, Eq)]
 pub struct InboundHTLCErr {
 	/// BOLT 4 error code.
 	pub err_code: u16,

lightning/src/offers/invoice.rs

@@ -503,6 +503,7 @@ for InvoiceBuilder<'a, DerivedSigningPubkey> {
 ///
 /// This is serialized as a TLV stream, which includes TLV records from the originating message. As
 /// such, it may include unknown, odd TLV records.
+#[derive(Clone)]
 pub struct UnsignedBolt12Invoice {
 	bytes: Vec<u8>,
 	contents: InvoiceContents,

lightning/src/offers/invoice_request.rs

@@ -487,6 +487,7 @@ for InvoiceRequestBuilder<'a, 'b, DerivedPayerId, secp256k1::All> {
 ///
 /// This is serialized as a TLV stream, which includes TLV records from the originating message. As
 /// such, it may include unknown, odd TLV records.
+#[derive(Clone)]
 pub struct UnsignedInvoiceRequest {
 	bytes: Vec<u8>,
 	contents: InvoiceRequestContents,