Adjust the code with librustzcash/zcash_protocol nu6 related changes

zebra-chain/src/parameters/network_upgrade.rs

@@ -531,7 +531,12 @@ impl From<zcash_protocol::consensus::NetworkUpgrade> for NetworkUpgrade {
             zcash_protocol::consensus::NetworkUpgrade::Heartwood => Self::Heartwood,
             zcash_protocol::consensus::NetworkUpgrade::Canopy => Self::Canopy,
             zcash_protocol::consensus::NetworkUpgrade::Nu5 => Self::Nu5,
+            // FIXME: remove cfg
+            #[cfg(zcash_unstable = "nu6")]
             zcash_protocol::consensus::NetworkUpgrade::Nu6 => Self::Nu6,
+            // FIXME: remove cfg and process Nu7 properly (uses Self::Nu6 for now)
+            #[cfg(zcash_unstable = "nu6")]
+            zcash_protocol::consensus::NetworkUpgrade::Nu7 => Self::Nu6,
         }
     }
 }

zebra-chain/src/primitives/zcash_primitives.rs

@@ -137,6 +137,16 @@ impl zp_tx::components::orchard::MapAuth<orchard::bundle::Authorized, orchard::b
     }
 }
 
+// FIXME: is this implemetation correct?
+#[cfg(zcash_unstable = "nu6")]
+impl zp_tx::components::issuance::MapIssueAuth<orchard::issuance::Signed, orchard::issuance::Signed>
+    for IdentityMap
+{
+    fn map_issue_authorization(&self, s: orchard::issuance::Signed) -> orchard::issuance::Signed {
+        s
+    }
+}
+
 #[derive(Debug)]
 struct PrecomputedAuth<'a> {
     _phantom: std::marker::PhantomData<&'a ()>,
@@ -146,6 +156,14 @@ impl<'a> zp_tx::Authorization for PrecomputedAuth<'a> {
     type TransparentAuth = TransparentAuth<'a>;
     type SaplingAuth = sapling_crypto::bundle::Authorized;
     type OrchardAuth = orchard::bundle::Authorized;
+
+    // FIXME: is this correct?
+    #[cfg(zcash_unstable = "nu6")]
+    type OrchardZsaAuth = orchard::bundle::Authorized;
+
+    // FIXME: is this correct?
+    #[cfg(zcash_unstable = "nu6")]
+    type IssueAuth = orchard::issuance::Signed;
 }
 
 // End of (mostly) copied code
@@ -275,7 +293,14 @@ impl<'a> PrecomputedTxData<'a> {
         };
         let tx_data: zp_tx::TransactionData<PrecomputedAuth> = alt_tx
             .into_data()
-            .map_authorization(f_transparent, IdentityMap, IdentityMap);
+            // FIXME: do we need to pass another arg values or orchard_zsa and issue instead of IdentityMap?
+            .map_authorization(
+                f_transparent,
+                IdentityMap,
+                IdentityMap,
+                IdentityMap,
+                IdentityMap,
+            );
 
         PrecomputedTxData {
             tx_data,