Adding Transaction.isGoQuorumPrivateTransaction() method

Signed-off-by: Lucas Saldanha <lucascrsaldanha@gmail.com>

ethereum/core/src/main/java/org/hyperledger/besu/ethereum/core/Transaction.java

@@ -490,6 +490,15 @@ public boolean isEIP1559Transaction() {
     return getGasPremium().isPresent() && getFeeCap().isPresent();
   }
 
+  @Override
+  public boolean isGoQuorumPrivateTransaction() {
+    return v.map(
+            value ->
+                GO_QUORUM_PRIVATE_TRANSACTION_V_VALUE_MIN.equals(value)
+                    || GO_QUORUM_PRIVATE_TRANSACTION_V_VALUE_MAX.equals(value))
+        .orElse(false);
+  }
+
   private static Bytes32 computeSenderRecoveryHash(
       final long nonce,
       final Wei gasPrice,

ethereum/core/src/test/java/org/hyperledger/besu/ethereum/core/TransactionGoQuorumTest.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright ConsenSys AG.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
+ * an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package org.hyperledger.besu.ethereum.core;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import org.hyperledger.besu.config.GoQuorumOptions;
+import org.hyperledger.besu.ethereum.rlp.RLP;
+import org.hyperledger.besu.ethereum.rlp.RLPInput;
+
+import org.apache.tuweni.bytes.Bytes;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+public class TransactionGoQuorumTest {
+
+  private static final RLPInput ETHEREUM_PUBLIC_TX_RLP =
+      toRLP(
+          "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");
+  private static final RLPInput GOQUORUM_PRIVATE_TX_RLP_V37 =
+      toRLP(
+          "0xf88d0b808347b7608080b840290a80a37d198ff06abe189b638ff53ac8a8dc51a0aff07609d2aa75342783ae493b3e3c6b564c0eebe49284b05a0726fb33087b9e0231d349ea0c7b5661c8c525a07144db7045a395e608cda6ab051c86cc4fb42e319960b82087f3b26f0cbc3c2da00223ac129b22aec7a6c2ace3c3ef39c5eaaa54070fd82d8ee2140b0e70b1dca9");
+  private static final RLPInput GOQUORUM_PRIVATE_TX_RLP_v38 =
+      toRLP(
+          "0xf88d0b808347b7608080b840290a80a37d198ff06abe189b638ff53ac8a8dc51a0aff07609d2aa75342783ae493b3e3c6b564c0eebe49284b05a0726fb33087b9e0231d349ea0c7b5661c8c526a07144db7045a395e608cda6ab051c86cc4fb42e319960b82087f3b26f0cbc3c2da00223ac129b22aec7a6c2ace3c3ef39c5eaaa54070fd82d8ee2140b0e70b1dca9");
+
+  @BeforeClass
+  public static void beforeClass() {
+    GoQuorumOptions.goquorumCompatibilityMode = true;
+  }
+
+  @AfterClass
+  public static void afterClass() {
+    GoQuorumOptions.goquorumCompatibilityMode =
+        GoQuorumOptions.GOQUORUM_COMPATIBILITY_MODE_DEFAULT_VALUE;
+  }
+
+  @Test
+  public void givenPublicTransaction_assertThatIsGoQuorumFlagIsFalse() {
+    Transaction transaction = Transaction.readFrom(ETHEREUM_PUBLIC_TX_RLP);
+    assertThat(transaction.isGoQuorumPrivateTransaction()).isFalse();
+  }
+
+  @Test
+  public void givenGoQuorumTransactionV37_assertThatIsGoQuorumFlagIsTrue() {
+    Transaction transaction = Transaction.readFrom(GOQUORUM_PRIVATE_TX_RLP_V37);
+
+    assertThat(transaction.getV()).isEqualTo(37);
+    assertThat(transaction.isGoQuorumPrivateTransaction()).isTrue();
+  }
+
+  @Test
+  public void givenGoQuorumTransactionV38_assertThatIsGoQuorumFlagIsTrue() {
+    Transaction transaction = Transaction.readFrom(GOQUORUM_PRIVATE_TX_RLP_v38);
+
+    assertThat(transaction.getV()).isEqualTo(38);
+    assertThat(transaction.isGoQuorumPrivateTransaction()).isTrue();
+  }
+
+  private static RLPInput toRLP(String bytes) {
+    return RLP.input(Bytes.fromHexString(bytes));
+  }
+}

plugin-api/src/main/java/org/hyperledger/besu/plugin/data/Transaction.java

@@ -191,6 +191,17 @@ default boolean isEIP1559Transaction() {
     return false;
   }
 
+  /**
+   * Returns whether or not the transaction is a GoQuorum private transaction. <br>
+   * <br>
+   * A GoQuorum private transaction has its <i>v</i> value equal to 37 or 38.
+   *
+   * @return true if GoQuorum private transaction, false otherwise
+   */
+  default boolean isGoQuorumPrivateTransaction() {
+    return false;
+  }
+
   /**
    * Returns the type of the transaction.
    *