feat(api): Optimize error handling of shielded transaction api

framework/src/main/java/org/tron/core/Wallet.java

@@ -3453,6 +3453,9 @@ private void checkShieldedTRC20NoteValue(
         if (spendNote.getNote().getValue() < 0) {
           throw new ContractValidateException("The value in SpendNoteTRC20 must >= 0");
         }
+        if (StringUtils.isEmpty(spendNote.getNote().getPaymentAddress())) {
+          throw new ContractValidateException("Payment Address in SpendNote should not be empty");
+        }
       }
     }
 
@@ -3461,6 +3464,9 @@ private void checkShieldedTRC20NoteValue(
         if (receiveNote.getNote().getValue() < 0) {
           throw new ContractValidateException("The value in ReceiveNote must >= 0");
         }
+        if (StringUtils.isEmpty(receiveNote.getNote().getPaymentAddress())) {
+          throw new ContractValidateException("Payment Address in ReceiveNote should not be empty");
+        }
       }
     }
   }

framework/src/main/java/org/tron/core/zen/address/KeyIo.java

@@ -19,6 +19,7 @@
 import java.io.ByteArrayOutputStream;
 import java.util.ArrayList;
 import java.util.List;
+import org.apache.commons.lang3.StringUtils;
 import org.tron.common.utils.Bech32;
 import org.tron.common.utils.Bech32.Bech32Data;
 
@@ -29,6 +30,9 @@ public class KeyIo {
   private static String SAPLING_PAYMENT_ADDRESS = "ztron";
 
   public static PaymentAddress decodePaymentAddress(String str) {
+    if (StringUtils.isEmpty(str)) {
+      return null;
+    }
     byte[] data;
     Bech32Data bech = Bech32.decode(str);
     if (bech.hrp.equals(SAPLING_PAYMENT_ADDRESS)

framework/src/test/java/org/tron/core/ShieldWalletTest.java

@@ -19,6 +19,7 @@
 import org.tron.core.capsule.TransactionCapsule;
 import org.tron.core.config.args.Args;
 import org.tron.core.exception.ContractExeException;
+import org.tron.core.exception.ContractValidateException;
 import org.tron.core.services.http.JsonFormat;
 import org.tron.core.services.http.JsonFormat.ParseException;
 
@@ -337,6 +338,82 @@ public void testCreateShieldedContractParameters() throws ContractExeException {
     }
   }
 
+  @Test
+  public void testCreateShieldedContractParameters2() throws ContractExeException {
+    librustzcashInitZksnarkParams();
+    Args.getInstance().setFullNodeAllowShieldedTransactionArgs(true);
+    Wallet wallet1 = spy(new Wallet());
+
+    doReturn(BigInteger.valueOf(1).toByteArray())
+        .when(wallet1).getShieldedContractScalingFactor(
+            ByteArray.fromHexString("4144007979359ECAC395BBD3CEF8060D3DF2DC3F01"));
+    String parameter = new String(ByteArray.fromHexString(
+        "7b0a202020202261736b223a2263323531336539653330383439343933326264383265306365353336"
+            + "363264313734323164393062373261383437316130613132623835353261333336653032222c0a202"
+            + "02020226e736b223a2234633662663364643461303634336432306236323866376534353938306335"
+            + "653138376630376135316436663365383661616631616239313663303765623064222c0a202020202"
+            + "26f766b223a2231376135386439613530353864613665343263613132636432383964306136616131"
+            + "363962393236633138653139626361353138623864366638363734653433222c0a202020202266726"
+            + "f6d5f616d6f756e74223a22313030222c0a2020202022736869656c6465645f726563656976657322"
+            + "3a5b0a20202020202020207b0a202020202020202020202020226e6f7465223a7b0a2020202020202"
+            + "02020202020202020202276616c7565223a3130302c0a202020202020202020202020202020202270"
+            + "61796d656e745f61646472657373223a22222c0a202020202020202020202020202020202272636d2"
+            + "23a223136623666356534303434346162376565616231316165363631336332376633353131373937"
+            + "3165666138376237313536306235383133383239633933393064220a2020202020202020202020207"
+            + "d0a20202020202020207d0a202020205d2c0a2020202022736869656c6465645f54524332305f636f"
+            + "6e74726163745f61646472657373223a2234313434303037393739333539454341433339354242443"
+            + "3434546383036304433444632444333463031220a7d"));
+
+    PrivateShieldedTRC20Parameters.Builder builder = PrivateShieldedTRC20Parameters.newBuilder();
+    try {
+      JsonFormat.merge(parameter, builder, false);
+    } catch (ParseException e) {
+      Assert.fail();
+    }
+
+    try {
+      wallet1.createShieldedContractParameters(builder.build());
+      Assert.fail();
+    } catch (Exception e) {
+      Assert.assertTrue(e instanceof ContractValidateException);
+      Assert.assertEquals("Payment Address in ReceiveNote should not be empty",
+          e.getMessage());
+    }
+
+    String parameter2 = new String(ByteArray.fromHexString(
+        "7b0a202020202261736b223a2263323531336539653330383439343933326264383265306365353336"
+            + "363264313734323164393062373261383437316130613132623835353261333336653032222c0a202"
+            + "02020226e736b223a2234633662663364643461303634336432306236323866376534353938306335"
+            + "653138376630376135316436663365383661616631616239313663303765623064222c0a202020202"
+            + "26f766b223a2231376135386439613530353864613665343263613132636432383964306136616131"
+            + "363962393236633138653139626361353138623864366638363734653433222c0a202020202266726"
+            + "f6d5f616d6f756e74223a22313030222c0a2020202022736869656c6465645f7370656e6473223a5b"
+            + "0a20202020202020207b0a202020202020202020202020226e6f7465223a7b0a20202020202020202"
+            + "0202020202020202276616c7565223a3130302c0a2020202020202020202020202020202022706179"
+            + "6d656e745f61646472657373223a22222c0a202020202020202020202020202020202272636d223a2"
+            + "231366236663565343034343461623765656162313161653636313363323766333531313739373165"
+            + "666138376237313536306235383133383239633933393064220a2020202020202020202020207d0a2"
+            + "0202020202020207d0a202020205d2c0a2020202022736869656c6465645f54524332305f636f6e74"
+            + "726163745f61646472657373223a22343134343030373937393335394543414333393542424433434"
+            + "546383036304433444632444333463031220a7d"));
+
+    builder = PrivateShieldedTRC20Parameters.newBuilder();
+    try {
+      JsonFormat.merge(parameter2, builder, false);
+    } catch (ParseException e) {
+      Assert.fail();
+    }
+
+    try {
+      wallet1.createShieldedContractParameters(builder.build());
+      Assert.fail();
+    } catch (Exception e) {
+      Assert.assertTrue(e instanceof ContractValidateException);
+      Assert.assertEquals("Payment Address in SpendNote should not be empty",
+          e.getMessage());
+    }
+  }
+
   @Test
   public void testCreateShieldedContractParametersWithoutAsk() throws ContractExeException {
     librustzcashInitZksnarkParams();

framework/src/test/java/org/tron/core/ShieldedTRC20BuilderTest.java

@@ -2269,7 +2269,7 @@ public void testscanShieldedTRC20NotesByOvk() throws Exception {
     }
   }
 
-  @Test(expected = IllegalArgumentException.class)
+  @Test(expected = ZksnarkException.class)
   public void isShieldedTRC20ContractNoteSpent() throws Exception {
     int statNum = 9200;
     int endNum = 9240;