two clarifying doc-comments

zingolib/src/wallet/transaction_context.rs

@@ -88,12 +88,9 @@ pub mod decrypt_transaction {
             // Collect our t-addresses for easy checking
             let taddrs_set = self.key.get_all_taddrs(&self.config);
             // Process t-address outputs
-            // If this transaction in outgoing, i.e., we received sent some money in this transaction, then we need to grab all transparent outputs
-            // that don't belong to us as the outgoing metadata
-            // the assumption is either we already decrypted a compact output and filled in some data
-            // or transparent something
-
-            // in the send case, we already know the transaction is outgoing. however, this if clause will not trigger.
+            // If the there's funding known to be input to this transaction by this Capability
+            // then it's known to be Outgoing.  It may still be outgoing but those funds may not be known
+            // at this point.
             if self
                 .transaction_metadata_set
                 .read()

zingolib/src/wallet/transaction_records_by_id.rs

@@ -277,6 +277,8 @@ impl TransactionRecordsById {
             .sum();
         Ok(query_record.total_transparent_value_spent + sapling_spend_value + orchard_spend_value)
     }
+    // The value that's output, but *NOT* to an explicit receiver (unless this is running on the winning validator!)
+    // is the fee.
     fn total_value_output_to_explicit_receivers(&self, query_record: &TransactionRecord) -> u64 {
         let transparent_output_value: u64 = query_record
             .transparent_outputs()