Fix memleak in Hash and bug in devp2p Packet creation

Signed-off-by: Luis Pinto <luis.pinto@consensys.net>

Author: lu-pinto

crypto/src/main/java/org/apache/tuweni/v2/crypto/Hash.java

@@ -104,7 +104,7 @@ public static byte[] sha2_256(byte[] input) {
       try {
         SHA256Hash.Hash result = SHA256Hash.hash(shaInput);
         try {
-          return SHA256Hash.hash(shaInput).bytesArray();
+          return result.bytesArray();
         } finally {
           result.destroy();
         }
@@ -131,7 +131,7 @@ public static Bytes sha2_256(Bytes input) {
       try {
         SHA256Hash.Hash result = SHA256Hash.hash(shaInput);
         try {
-          return SHA256Hash.hash(shaInput).bytes();
+          return result.bytes();
         } finally {
           result.destroy();
         }

devp2p/src/main/kotlin/org/apache/tuweni/devp2p/Packet.kt

@@ -398,7 +398,7 @@ internal class ENRRequestPacket private constructor(
     fun create(keyPair: SECP256K1.KeyPair, now: Long): Packet {
       val expiration = expirationFor(now)
       val sigHash = createSignature(
-        PacketType.ENRRESPONSE,
+        PacketType.ENRREQUEST,
         keyPair,
       ) { writer ->
         encodeTo(writer, expiration)

devp2p/src/main/kotlin/org/apache/tuweni/v2/devp2p/Packet.kt

@@ -397,7 +397,7 @@ internal class ENRRequestPacket private constructor(
     fun create(keyPair: SECP256K1.KeyPair, now: Long): Packet {
       val expiration = expirationFor(now)
       val sigHash = createSignature(
-        PacketType.ENRRESPONSE,
+        PacketType.ENRREQUEST,
         keyPair,
       ) { writer ->
         encodeTo(writer, expiration)