Expose the payment address of transaction inputs.

Author: murisi

masp_primitives/src/transaction/components/sapling/builder.rs

@@ -483,6 +483,10 @@ impl<K> fees::InputView<(), K> for SpendDescriptionInfo<K> {
     fn key(&self) -> &K {
         &self.extsk
     }
+
+    fn address(&self) -> Option<PaymentAddress> {
+        PaymentAddress::from_parts(self.diversifier, self.note.pk_d)
+    }
 }
 
 /// A struct containing the information required in order to construct a

masp_primitives/src/transaction/components/sapling/fees.rs

@@ -16,6 +16,8 @@ pub trait InputView<NoteRef, Key> {
     fn asset_type(&self) -> AssetType;
     /// The spend/view key of the input being spent.
     fn key(&self) -> &Key;
+    /// The payment address of this input
+    fn address(&self) -> Option<PaymentAddress>;
 }
 
 /// A trait that provides a minimized view of a Sapling conversion suitable for use in