[Tests] Check spent nullifier in sapling_wallet_listreceived

test/functional/sapling_wallet_listreceived.py

@@ -120,6 +120,11 @@ def run_test(self):
         # Now can check that the information is the same
         assert_equal(r, r2)
 
+        # Get the note nullifier
+        lsu = self.nodes[1].listshieldedunspent();
+        assert_equal(len(lsu), 1)
+        nullifier = lsu[0]["nullifier"]
+
         # Generate some change by sending part of shield_addr1 to shield_addr2
         txidPrev = txid
         shield_addr2 = self.nodes[1].getnewshieldedaddress()
@@ -129,6 +134,10 @@ def run_test(self):
         self.sync_all()
         self.generate_and_sync(height+4)
 
+        # Verify the spent nullifier
+        tx_json = self.nodes[1].getrawtransaction(txid, True)
+        assert_equal(nullifier, tx_json["vShieldedSpend"][0]["nullifier"])
+
         # Decrypted transaction details should be correct
         pt = self.nodes[1].viewshieldedtransaction(txid)
         assert_equal(pt['txid'], txid)