zcash_client_sqlite: Store received UTXOs in store_decrypted_tx.

This fixes an issue wherein transparent outputs of transactions added to
the wallet via `decrypt_and_store_transaction` would not be properly
recorded as UTXOs belonging to the wallet.

Fixes zcash#1434

zcash_client_backend/CHANGELOG.md

@@ -26,7 +26,8 @@ funds to those addresses. See [ZIP 320](https://zips.z.cash/zip-0320) for detail
 ### Added
 - `zcash_client_backend::data_api`:
   - `chain::BlockCache` trait, behind the `sync` feature flag.
-  - `WalletRead::get_spendable_transparent_outputs`.
+  - `WalletRead::get_spendable_transparent_outputs`
+  - `DecryptedTransaction::mined_height`
 - `zcash_client_backend::fees`:
   - `EphemeralBalance`
   - `ChangeValue::shielded, is_ephemeral`
@@ -68,6 +69,7 @@ funds to those addresses. See [ZIP 320](https://zips.z.cash/zip-0320) for detail
   - `error::Error` has new `Address` and (when the "transparent-inputs" feature
     is enabled) `PaysEphemeralTransparentAddress` variants.
   - `wallet::input_selection::InputSelectorError` has a new `Address` variant.
+  - `DecryptedTransaction::new` takes an additional `mined_height` argument.
 - `zcash_client_backend::data_api::fees`
   - When the "transparent-inputs" feature is enabled, `ChangeValue` can also
     represent an ephemeral transparent output in a proposal. Accordingly, the

zcash_client_backend/src/data_api.rs

@@ -1263,6 +1263,7 @@ impl<A> ScannedBlock<A> {
 /// The purpose of this struct is to permit atomic updates of the
 /// wallet database when transactions are successfully decrypted.
 pub struct DecryptedTransaction<'a, AccountId> {
+    mined_height: Option<BlockHeight>,
     tx: &'a Transaction,
     sapling_outputs: Vec<DecryptedOutput<sapling::Note, AccountId>>,
     #[cfg(feature = "orchard")]
@@ -1272,20 +1273,26 @@ pub struct DecryptedTransaction<'a, AccountId> {
 impl<'a, AccountId> DecryptedTransaction<'a, AccountId> {
     /// Constructs a new [`DecryptedTransaction`] from its constituent parts.
     pub fn new(
+        mined_height: Option<BlockHeight>,
         tx: &'a Transaction,
         sapling_outputs: Vec<DecryptedOutput<sapling::Note, AccountId>>,
         #[cfg(feature = "orchard")] orchard_outputs: Vec<
             DecryptedOutput<orchard::note::Note, AccountId>,
         >,
     ) -> Self {
         Self {
+            mined_height,
             tx,
             sapling_outputs,
             #[cfg(feature = "orchard")]
             orchard_outputs,
         }
     }
 
+    /// Returns the height at which the transaction was mined, if known.
+    pub fn mined_height(&self) -> Option<BlockHeight> {
+        self.mined_height
+    }
     /// Returns the raw transaction data.
     pub fn tx(&self) -> &Transaction {
         self.tx

zcash_client_backend/src/decrypt.rs

@@ -215,6 +215,7 @@ pub fn decrypt_transaction<'a, P: consensus::Parameters, AccountId: Copy>(
         .collect();
 
     DecryptedTransaction::new(
+        Some(height),
         tx,
         sapling_outputs,
         #[cfg(feature = "orchard")]

zcash_client_sqlite/src/lib.rs

@@ -124,6 +124,9 @@ use wallet::{
     SubtreeScanProgress,
 };
 
+#[cfg(feature = "transparent-inputs")]
+use wallet::transparent::{find_account_for_transparent_address, put_transparent_output};
+
 #[cfg(test)]
 mod testing;
 
@@ -1351,6 +1354,23 @@ impl<P: consensus::Parameters> WalletWrite for WalletDb<rusqlite::Connection, P>
                                 txout.value,
                                 None,
                             )?;
+                        } else {
+                            #[cfg(feature = "transparent-inputs")]
+                            if let Some(account_id) = find_account_for_transparent_address(
+                                wdb.conn.0,
+                                &wdb.params,
+                                &address
+                            )? {
+                                put_transparent_output(
+                                    wdb.conn.0,
+                                    &wdb.params,
+                                    &OutPoint::new(d_tx.tx().txid().into(), u32::try_from(output_index).unwrap()),
+                                    txout,
+                                    d_tx.mined_height(),
+                                    &address,
+                                    account_id
+                                )?;
+                            }
                         }
                     }
                 }

zcash_client_sqlite/src/testing/pool.rs

@@ -582,6 +582,7 @@ pub(crate) fn send_multi_step_proposed_transfer<T: ShieldedPoolTester>() {
         .unwrap();
     let txid = build_result.transaction().txid();
     let decrypted_tx = DecryptedTransaction::<AccountId>::new(
+        None,
         build_result.transaction(),
         vec![],
         #[cfg(feature = "orchard")]

zcash_primitives/src/legacy.rs

@@ -1,6 +1,7 @@
 //! Support for legacy transparent addresses and scripts.
 
 use byteorder::{ReadBytesExt, WriteBytesExt};
+use zcash_address::TryFromAddress;
 
 use std::fmt;
 use std::io::{self, Read, Write};
@@ -407,6 +408,24 @@ impl TransparentAddress {
     }
 }
 
+impl TryFromAddress for TransparentAddress {
+    type Error = ();
+
+    fn try_from_transparent_p2pkh(
+        _net: zcash_address::Network,
+        data: [u8; 20],
+    ) -> Result<Self, zcash_address::ConversionError<Self::Error>> {
+        Ok(TransparentAddress::PublicKeyHash(data))
+    }
+
+    fn try_from_transparent_p2sh(
+        _net: zcash_address::Network,
+        data: [u8; 20],
+    ) -> Result<Self, zcash_address::ConversionError<Self::Error>> {
+        Ok(TransparentAddress::ScriptHash(data))
+    }
+}
+
 #[cfg(any(test, feature = "test-dependencies"))]
 pub mod testing {
     use proptest::prelude::{any, prop_compose};