Update TransactionException.java

Signed-off-by: Abdelrahman Hedia <66520407+bodyhedia44@users.noreply.github.com>

Author: bodyhedia44

core/src/main/java/org/web3j/protocol/exceptions/TransactionException.java

@@ -68,7 +68,12 @@ public Optional<String> getTransactionHash() {
     public Optional<TransactionReceipt> getTransactionReceipt() {
         return transactionReceipt;
     }
-
+    
+    /**
+     * Obtain the Encoded data field from response.
+     *
+     * @return optional Encoded data field .
+     */
     public Optional<String> getEncodedDataResponse() {
         return encodedDataResponse;
     }