diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 9b0082740f..5296a8ec08 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -14,6 +14,7 @@
         <module name="core-java-uuid" />
         <module name="core-java-numbers" />
         <module name="jackson-polymorphic-deserialization" />
+        <module name="ethereum" />
         <module name="core-java-strings" />
         <module name="jackson" />
         <module name="core-java-11" />
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
index 6fc7c0eec4..143a239944 100644
--- a/.idea/encodings.xml
+++ b/.idea/encodings.xml
@@ -61,6 +61,8 @@
     <file url="file://$PROJECT_DIR$/core-java-modules/core-java/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/core-java-modules/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/ethereum/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/ethereum/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/image-compressing/src/main/java" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/image-compressing/src/main/resources" charset="UTF-8" />
     <file url="file://$PROJECT_DIR$/image-processing/src/main/java" charset="UTF-8" />
diff --git a/.idea/jarRepositories.xml b/.idea/jarRepositories.xml
index cfbbd38e55..da3c1d5f51 100644
--- a/.idea/jarRepositories.xml
+++ b/.idea/jarRepositories.xml
@@ -11,6 +11,11 @@
       <option name="name" value="OSSEZ Private Snapshots" />
       <option name="url" value="https://repo.ossez.com/repository/maven-snapshots/" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="ossez-repo-releases" />
+      <option name="name" value="iSharkFly Private Releases" />
+      <option name="url" value="https://repo.isharkfly.com/repository/isharkfly-maven-releases/" />
+    </remote-repository>
     <remote-repository>
       <option name="id" value="central" />
       <option name="name" value="Central Repository" />
@@ -61,11 +66,26 @@
       <option name="name" value="OSSEZ Private Snapshots" />
       <option name="url" value="https://repo.isharkfly.com/repository/maven-snapshots/" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="Ethereum" />
+      <option name="name" value="Ethereum" />
+      <option name="url" value="https://dl.bintray.com/ethereum/maven/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.isharkfly.com/repository/maven/" />
+    </remote-repository>
     <remote-repository>
       <option name="id" value="ossez-repo-releases" />
       <option name="name" value="OSSEZ Private Releases" />
       <option name="url" value="https://repo.ossez.com/repository/maven-releases/" />
     </remote-repository>
+    <remote-repository>
+      <option name="id" value="ossez-repo-snapshots" />
+      <option name="name" value="iSharkFly Private Snapshots" />
+      <option name="url" value="https://repo.isharkfly.com/repository/isharkfly-maven-snapshots/" />
+    </remote-repository>
     <remote-repository>
       <option name="id" value="ossez-repo-releases" />
       <option name="name" value="iSharkFly Private Releases" />
diff --git a/ethereum/.idea/.gitignore b/ethereum/.idea/.gitignore
new file mode 100644
index 0000000000..7d9a8e5127
--- /dev/null
+++ b/ethereum/.idea/.gitignore
@@ -0,0 +1,12 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Environment-dependent path to Maven home directory
+/mavenHomeManager.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Zeppelin ignored files
+/ZeppelinRemoteNotebooks/
diff --git a/ethereum/.idea/checkstyle-idea.xml b/ethereum/.idea/checkstyle-idea.xml
new file mode 100644
index 0000000000..87234f98cb
--- /dev/null
+++ b/ethereum/.idea/checkstyle-idea.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CheckStyle-IDEA" serialisationVersion="2">
+    <checkstyleVersion>10.23.0</checkstyleVersion>
+    <scanScope>JavaOnly</scanScope>
+    <copyLibs>true</copyLibs>
+    <option name="thirdPartyClasspath" />
+    <option name="activeLocationIds" />
+    <option name="locations">
+      <list>
+        <ConfigurationLocation id="bundled-sun-checks" type="BUNDLED" scope="All" description="Sun Checks">(bundled)</ConfigurationLocation>
+        <ConfigurationLocation id="bundled-google-checks" type="BUNDLED" scope="All" description="Google Checks">(bundled)</ConfigurationLocation>
+      </list>
+    </option>
+  </component>
+</project>
\ No newline at end of file
diff --git a/ethereum/.idea/compiler.xml b/ethereum/.idea/compiler.xml
new file mode 100644
index 0000000000..6e45650062
--- /dev/null
+++ b/ethereum/.idea/compiler.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="ethereum" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>
\ No newline at end of file
diff --git a/ethereum/.idea/encodings.xml b/ethereum/.idea/encodings.xml
new file mode 100644
index 0000000000..aa00ffab78
--- /dev/null
+++ b/ethereum/.idea/encodings.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/ethereum/.idea/jarRepositories.xml b/ethereum/.idea/jarRepositories.xml
new file mode 100644
index 0000000000..5f0d631852
--- /dev/null
+++ b/ethereum/.idea/jarRepositories.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="Ethereum" />
+      <option name="name" value="Ethereum" />
+      <option name="url" value="https://dl.bintray.com/ethereum/maven/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="ossez-repo-releases" />
+      <option name="name" value="iSharkFly Private Releases" />
+      <option name="url" value="https://repo.isharkfly.com/repository/isharkfly-maven-releases/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://repo.isharkfly.com/repository/maven/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="ossez-repo-snapshots" />
+      <option name="name" value="iSharkFly Private Snapshots" />
+      <option name="url" value="https://repo.isharkfly.com/repository/isharkfly-maven-snapshots/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+  </component>
+</project>
\ No newline at end of file
diff --git a/ethereum/.idea/vcs.xml b/ethereum/.idea/vcs.xml
new file mode 100644
index 0000000000..6c0b863585
--- /dev/null
+++ b/ethereum/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/ethereum/pom.xml b/ethereum/pom.xml
index 52f1d32d41..b1986e46fa 100644
--- a/ethereum/pom.xml
+++ b/ethereum/pom.xml
@@ -3,15 +3,14 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
-    <groupId>com.baeldung.ethereum</groupId>
+    <groupId>com.ossez.ethereum</groupId>
     <artifactId>ethereum</artifactId>
     <name>ethereum</name>
 
     <parent>
-        <groupId>com.baeldung</groupId>
-        <artifactId>parent-spring-5</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../parent-spring-5</relativePath>
+        <groupId>com.ossez</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>0.0.2-SNAPSHOT</version>
     </parent>
 
     <dependencies>
@@ -76,14 +75,15 @@
         </dependency>
         <!-- Servlet -->
         <dependency>
-            <groupId>javax.servlet</groupId>
-            <artifactId>jstl</artifactId>
-            <version>${jstl.version}</version>
+            <groupId>jakarta.servlet.jsp.jstl</groupId>
+            <artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
+            <version>3.0.2</version>
         </dependency>
         <dependency>
-            <groupId>javax.servlet</groupId>
-            <artifactId>javax.servlet-api</artifactId>
-            <version>${javax.servlet-api.version}</version>
+            <groupId>jakarta.servlet</groupId>
+            <artifactId>jakarta.servlet-api</artifactId>
+            <version>6.1.0</version>
+            <scope>provided</scope>
         </dependency>
         <dependency>
             <groupId>javax.servlet.jsp.jstl</groupId>
@@ -91,9 +91,10 @@
             <version>${jstl.version}</version>
         </dependency>
         <dependency>
-            <groupId>javax.servlet.jsp</groupId>
-            <artifactId>javax.servlet.jsp-api</artifactId>
-            <version>${javax.servlet.jsp-api.version}</version>
+            <groupId>jakarta.servlet.jsp</groupId>
+            <artifactId>jakarta.servlet.jsp-api</artifactId>
+            <version>4.0.0</version>
+            <scope>provided</scope>
         </dependency>
         <!-- Spring Testing -->
         <dependency>
@@ -113,19 +114,19 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
-            <version>${spring.version}</version>
+            <version>7.0.0-M4</version>
         </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-test</artifactId>
-            <version>${spring.version}</version>
+            <version>7.0.0-M4</version>
             <scope>test</scope>
         </dependency>
         <!-- Testing -->
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-core</artifactId>
-            <version>${mockito.version}</version>
+            <version>5.17.0</version>
             <exclusions>
                 <exclusion>
                     <groupId>org.hamcrest</groupId>
@@ -170,15 +171,16 @@
     </build>
 
     <repositories>
-        <repository>
-            <id>Ethereum</id>
-            <name>Ethereum</name>
-            <url>https://dl.bintray.com/ethereum/maven/</url>
-        </repository>
+<!--        <repository>-->
+<!--            <id>Ethereum</id>-->
+<!--            <name>Ethereum</name>-->
+<!--            <url>https://dl.bintray.com/ethereum/maven/</url>-->
+<!--        </repository>-->
     </repositories>
 
     <properties>
-        <ethereumj-core.version>1.5.0-RELEASE</ethereumj-core.version>
+        <spring.version>7.0.0-M4</spring.version>
+        <ethereumj-core.version>1.9.0-RELEASE</ethereumj-core.version>
         <web3j.core.version>3.3.1</web3j.core.version>
         <spring.boot.version>1.5.6.RELEASE</spring.boot.version>
         <jsonpath.version>2.8.0</jsonpath.version>
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/ApplicationMain.java b/ethereum/src/main/java/com/isharkfly/ethereumj/ApplicationMain.java
similarity index 83%
rename from ethereum/src/main/java/com/baeldung/ethereumj/ApplicationMain.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/ApplicationMain.java
index 4735548bd1..a77964a07d 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/ApplicationMain.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/ApplicationMain.java
@@ -1,4 +1,4 @@
-package com.baeldung.ethereumj;
+package com.isharkfly.ethereumj;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
@@ -8,7 +8,7 @@ import org.springframework.boot.web.support.SpringBootServletInitializer;
 
 @EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
 @SpringBootApplication
-public class ApplicationMain extends SpringBootServletInitializer {
+public abstract class ApplicationMain extends SpringBootServletInitializer {
 
     public static void main(String[] args) {
         SpringApplication.run(ApplicationMain.class, args);
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/Constants.java b/ethereum/src/main/java/com/isharkfly/ethereumj/Constants.java
similarity index 87%
rename from ethereum/src/main/java/com/baeldung/ethereumj/Constants.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/Constants.java
index 919958be35..da230ac0a8 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/Constants.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/Constants.java
@@ -1,4 +1,4 @@
-package com.baeldung.ethereumj;
+package com.isharkfly.ethereumj;
 
 public class Constants {
 
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/beans/EthBean.java b/ethereum/src/main/java/com/isharkfly/ethereumj/beans/EthBean.java
similarity index 85%
rename from ethereum/src/main/java/com/baeldung/ethereumj/beans/EthBean.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/beans/EthBean.java
index 7680473c6e..47783803d2 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/beans/EthBean.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/beans/EthBean.java
@@ -1,6 +1,6 @@
-package com.baeldung.ethereumj.beans;
+package com.isharkfly.ethereumj.beans;
 
-import com.baeldung.ethereumj.listeners.EthListener;
+import com.isharkfly.ethereumj.listeners.EthListener;
 import org.ethereum.core.Block;
 import org.ethereum.facade.Ethereum;
 import org.ethereum.facade.EthereumFactory;
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/config/EthConfig.java b/ethereum/src/main/java/com/isharkfly/ethereumj/config/EthConfig.java
similarity index 81%
rename from ethereum/src/main/java/com/baeldung/ethereumj/config/EthConfig.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/config/EthConfig.java
index 8180cc3ce2..c9e8b3782b 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/config/EthConfig.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/config/EthConfig.java
@@ -1,6 +1,6 @@
-package com.baeldung.ethereumj.config;
+package com.isharkfly.ethereumj.config;
 
-import com.baeldung.ethereumj.beans.EthBean;
+import com.isharkfly.ethereumj.beans.EthBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/controllers/EthController.java b/ethereum/src/main/java/com/isharkfly/ethereumj/controllers/EthController.java
similarity index 86%
rename from ethereum/src/main/java/com/baeldung/ethereumj/controllers/EthController.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/controllers/EthController.java
index 8240d60e30..64c3af49a3 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/controllers/EthController.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/controllers/EthController.java
@@ -1,8 +1,8 @@
-package com.baeldung.ethereumj.controllers;
+package com.isharkfly.ethereumj.controllers;
 
-import com.baeldung.ethereumj.Constants;
-import com.baeldung.ethereumj.beans.EthBean;
-import com.baeldung.ethereumj.transfer.EthResponse;
+import com.isharkfly.ethereumj.Constants;
+import com.isharkfly.ethereumj.beans.EthBean;
+import com.isharkfly.ethereumj.transfer.EthResponse;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/listeners/EthListener.java b/ethereum/src/main/java/com/isharkfly/ethereumj/listeners/EthListener.java
similarity index 98%
rename from ethereum/src/main/java/com/baeldung/ethereumj/listeners/EthListener.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/listeners/EthListener.java
index c3a5143fdb..e53ea5d367 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/listeners/EthListener.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/listeners/EthListener.java
@@ -1,4 +1,4 @@
-package com.baeldung.ethereumj.listeners;
+package com.isharkfly.ethereumj.listeners;
 
 import org.ethereum.core.Block;
 import org.ethereum.core.TransactionReceipt;
diff --git a/ethereum/src/main/java/com/baeldung/ethereumj/transfer/EthResponse.java b/ethereum/src/main/java/com/isharkfly/ethereumj/transfer/EthResponse.java
similarity index 83%
rename from ethereum/src/main/java/com/baeldung/ethereumj/transfer/EthResponse.java
rename to ethereum/src/main/java/com/isharkfly/ethereumj/transfer/EthResponse.java
index e8cfb3113b..5c352dd99b 100644
--- a/ethereum/src/main/java/com/baeldung/ethereumj/transfer/EthResponse.java
+++ b/ethereum/src/main/java/com/isharkfly/ethereumj/transfer/EthResponse.java
@@ -1,4 +1,4 @@
-package com.baeldung.ethereumj.transfer;
+package com.isharkfly.ethereumj.transfer;
 
 public class EthResponse {
 
diff --git a/ethereum/src/main/java/com/baeldung/web3j/Template.java b/ethereum/src/main/java/com/isharkfly/web3j/Template.java
similarity index 94%
rename from ethereum/src/main/java/com/baeldung/web3j/Template.java
rename to ethereum/src/main/java/com/isharkfly/web3j/Template.java
index 7d4867bf21..f9c1e80ad0 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/Template.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/Template.java
@@ -1,6 +1,6 @@
-package com.baeldung.web3j;
+package com.isharkfly.web3j;
 
-import com.baeldung.web3j.contracts.Greeting;
+import com.isharkfly.web3j.contracts.Greeting;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.web3j.crypto.Credentials;
diff --git a/ethereum/src/main/java/com/baeldung/web3j/config/AppConfig.java b/ethereum/src/main/java/com/isharkfly/web3j/config/AppConfig.java
similarity index 96%
rename from ethereum/src/main/java/com/baeldung/web3j/config/AppConfig.java
rename to ethereum/src/main/java/com/isharkfly/web3j/config/AppConfig.java
index 75ef948f7a..7d17bd0f5e 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/config/AppConfig.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/config/AppConfig.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.config;
+package com.isharkfly.web3j.config;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
@@ -18,7 +18,7 @@ import java.util.concurrent.Executor;
 @Configuration
 @EnableWebMvc
 @EnableAsync
-@ComponentScan("com.baeldung.web3j")
+@ComponentScan("com.isharkfly.web3j")
 public class AppConfig implements WebMvcConfigurer {
 
     public void addViewControllers(ViewControllerRegistry registry) {
diff --git a/ethereum/src/main/java/com/baeldung/web3j/config/WebAppInitializer.java b/ethereum/src/main/java/com/isharkfly/web3j/config/WebAppInitializer.java
similarity index 94%
rename from ethereum/src/main/java/com/baeldung/web3j/config/WebAppInitializer.java
rename to ethereum/src/main/java/com/isharkfly/web3j/config/WebAppInitializer.java
index 8a9a8cf8c1..7e22633830 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/config/WebAppInitializer.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/config/WebAppInitializer.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.config;
+package com.isharkfly.web3j.config;
 
 import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
 
diff --git a/ethereum/src/main/java/com/baeldung/web3j/constants/Constants.java b/ethereum/src/main/java/com/isharkfly/web3j/constants/Constants.java
similarity index 94%
rename from ethereum/src/main/java/com/baeldung/web3j/constants/Constants.java
rename to ethereum/src/main/java/com/isharkfly/web3j/constants/Constants.java
index 005e4263cd..09c17f4ae2 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/constants/Constants.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/constants/Constants.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.constants;
+package com.isharkfly.web3j.constants;
 
 public class Constants {
 
diff --git a/ethereum/src/main/java/com/baeldung/web3j/contracts/Example.java b/ethereum/src/main/java/com/isharkfly/web3j/contracts/Example.java
similarity index 98%
rename from ethereum/src/main/java/com/baeldung/web3j/contracts/Example.java
rename to ethereum/src/main/java/com/isharkfly/web3j/contracts/Example.java
index 6909ca3e0c..75922829c9 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/contracts/Example.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/contracts/Example.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.contracts;
+package com.isharkfly.web3j.contracts;
 
 import java.math.BigInteger;
 import java.util.Arrays;
diff --git a/ethereum/src/main/java/com/baeldung/web3j/contracts/Greeting.java b/ethereum/src/main/java/com/isharkfly/web3j/contracts/Greeting.java
similarity index 99%
rename from ethereum/src/main/java/com/baeldung/web3j/contracts/Greeting.java
rename to ethereum/src/main/java/com/isharkfly/web3j/contracts/Greeting.java
index f4f4f90760..59b94b0a9c 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/contracts/Greeting.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/contracts/Greeting.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.contracts;
+package com.isharkfly.web3j.contracts;
 
 import java.math.BigInteger;
 import java.util.Arrays;
diff --git a/ethereum/src/main/java/com/baeldung/web3j/controllers/EthereumRestController.java b/ethereum/src/main/java/com/isharkfly/web3j/controllers/EthereumRestController.java
similarity index 92%
rename from ethereum/src/main/java/com/baeldung/web3j/controllers/EthereumRestController.java
rename to ethereum/src/main/java/com/isharkfly/web3j/controllers/EthereumRestController.java
index 3238a19ff9..f65e01768a 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/controllers/EthereumRestController.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/controllers/EthereumRestController.java
@@ -1,9 +1,9 @@
-package com.baeldung.web3j.controllers;
+package com.isharkfly.web3j.controllers;
 
-import com.baeldung.web3j.constants.Constants;
-import com.baeldung.web3j.helpers.TimeHelper;
-import com.baeldung.web3j.services.Web3Service;
-import com.baeldung.web3j.transfers.ResponseTransfer;
+import com.isharkfly.web3j.constants.Constants;
+import com.isharkfly.web3j.helpers.TimeHelper;
+import com.isharkfly.web3j.services.Web3Service;
+import com.isharkfly.web3j.transfers.ResponseTransfer;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
@@ -17,7 +17,7 @@ import java.time.Instant;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Future;
 
-import static com.baeldung.web3j.constants.Constants.GENERIC_EXCEPTION;
+import static com.isharkfly.web3j.constants.Constants.GENERIC_EXCEPTION;
 
 @RestController
 public class EthereumRestController {
diff --git a/ethereum/src/main/java/com/baeldung/web3j/helpers/TimeHelper.java b/ethereum/src/main/java/com/isharkfly/web3j/helpers/TimeHelper.java
similarity index 88%
rename from ethereum/src/main/java/com/baeldung/web3j/helpers/TimeHelper.java
rename to ethereum/src/main/java/com/isharkfly/web3j/helpers/TimeHelper.java
index 360fe088ba..7bdef5b776 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/helpers/TimeHelper.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/helpers/TimeHelper.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.helpers;
+package com.isharkfly.web3j.helpers;
 
 import java.time.Duration;
 import java.time.Instant;
diff --git a/ethereum/src/main/java/com/baeldung/web3j/services/Web3Service.java b/ethereum/src/main/java/com/isharkfly/web3j/services/Web3Service.java
similarity index 93%
rename from ethereum/src/main/java/com/baeldung/web3j/services/Web3Service.java
rename to ethereum/src/main/java/com/isharkfly/web3j/services/Web3Service.java
index 4b7d01e52b..441e74a520 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/services/Web3Service.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/services/Web3Service.java
@@ -1,6 +1,6 @@
-package com.baeldung.web3j.services;
+package com.isharkfly.web3j.services;
 
-import com.baeldung.web3j.contracts.Example;
+import com.isharkfly.web3j.contracts.Example;
 import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 import org.web3j.abi.FunctionEncoder;
@@ -22,11 +22,10 @@ import java.io.File;
 import java.math.BigInteger;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.CompletableFuture;
 
-import static com.baeldung.web3j.constants.Constants.DEFAULT_ADDRESS;
-import static com.baeldung.web3j.constants.Constants.GENERIC_EXCEPTION;
-import static com.baeldung.web3j.constants.Constants.PLEASE_SUPPLY_REAL_DATA;
+import static com.isharkfly.web3j.constants.Constants.DEFAULT_ADDRESS;
+import static com.isharkfly.web3j.constants.Constants.GENERIC_EXCEPTION;
+import static com.isharkfly.web3j.constants.Constants.PLEASE_SUPPLY_REAL_DATA;
 
 @Service
 public class Web3Service {
diff --git a/ethereum/src/main/java/com/baeldung/web3j/transfers/ResponseTransfer.java b/ethereum/src/main/java/com/isharkfly/web3j/transfers/ResponseTransfer.java
similarity index 92%
rename from ethereum/src/main/java/com/baeldung/web3j/transfers/ResponseTransfer.java
rename to ethereum/src/main/java/com/isharkfly/web3j/transfers/ResponseTransfer.java
index 9c5d1799ff..c8fb4c5ddc 100644
--- a/ethereum/src/main/java/com/baeldung/web3j/transfers/ResponseTransfer.java
+++ b/ethereum/src/main/java/com/isharkfly/web3j/transfers/ResponseTransfer.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.transfers;
+package com.isharkfly.web3j.transfers;
 
 import java.time.Duration;
 
diff --git a/ethereum/src/test/java/com/baeldung/ethereumj/controllers/EthControllerLiveTest.java b/ethereum/src/test/java/com/isharkfly/ethereumj/controllers/EthControllerLiveTest.java
similarity index 93%
rename from ethereum/src/test/java/com/baeldung/ethereumj/controllers/EthControllerLiveTest.java
rename to ethereum/src/test/java/com/isharkfly/ethereumj/controllers/EthControllerLiveTest.java
index 7676b99224..f6fae941f1 100644
--- a/ethereum/src/test/java/com/baeldung/ethereumj/controllers/EthControllerLiveTest.java
+++ b/ethereum/src/test/java/com/isharkfly/ethereumj/controllers/EthControllerLiveTest.java
@@ -1,4 +1,4 @@
-package com.baeldung.ethereumj.controllers;
+package com.isharkfly.ethereumj.controllers;
 
 import static junit.framework.TestCase.assertTrue;
 import static org.junit.Assert.assertNotNull;
@@ -17,9 +17,9 @@ import org.springframework.test.context.TestPropertySource;
 import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.web.client.RestTemplate;
 
-import com.baeldung.ethereumj.ApplicationMain;
-import com.baeldung.ethereumj.Constants;
-import com.baeldung.ethereumj.transfer.EthResponse;
+import com.isharkfly.ethereumj.ApplicationMain;
+import com.isharkfly.ethereumj.Constants;
+import com.isharkfly.ethereumj.transfer.EthResponse;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = ApplicationMain.class, webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
diff --git a/ethereum/src/test/java/com/baeldung/web3j/controllers/EthereumRestControllerIntegrationTest.java b/ethereum/src/test/java/com/isharkfly/web3j/controllers/EthereumRestControllerIntegrationTest.java
similarity index 94%
rename from ethereum/src/test/java/com/baeldung/web3j/controllers/EthereumRestControllerIntegrationTest.java
rename to ethereum/src/test/java/com/isharkfly/web3j/controllers/EthereumRestControllerIntegrationTest.java
index ee78ab17c2..12b94a2441 100644
--- a/ethereum/src/test/java/com/baeldung/web3j/controllers/EthereumRestControllerIntegrationTest.java
+++ b/ethereum/src/test/java/com/isharkfly/web3j/controllers/EthereumRestControllerIntegrationTest.java
@@ -1,8 +1,8 @@
-package com.baeldung.web3j.controllers;
+package com.isharkfly.web3j.controllers;
 
 
-import com.baeldung.web3j.config.AppConfig;
-import com.baeldung.web3j.constants.Constants;
+import com.isharkfly.web3j.config.AppConfig;
+import com.isharkfly.web3j.constants.Constants;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/ethereum/src/test/java/com/baeldung/web3j/controllers/EthereumRestControllerUnitTest.java b/ethereum/src/test/java/com/isharkfly/web3j/controllers/EthereumRestControllerUnitTest.java
similarity index 93%
rename from ethereum/src/test/java/com/baeldung/web3j/controllers/EthereumRestControllerUnitTest.java
rename to ethereum/src/test/java/com/isharkfly/web3j/controllers/EthereumRestControllerUnitTest.java
index 4ceed870f8..dc2b1cdedc 100644
--- a/ethereum/src/test/java/com/baeldung/web3j/controllers/EthereumRestControllerUnitTest.java
+++ b/ethereum/src/test/java/com/isharkfly/web3j/controllers/EthereumRestControllerUnitTest.java
@@ -1,7 +1,7 @@
-package com.baeldung.web3j.controllers;
+package com.isharkfly.web3j.controllers;
 
-import com.baeldung.web3j.constants.Constants;
-import com.baeldung.web3j.services.Web3Service;
+import com.isharkfly.web3j.constants.Constants;
+import com.isharkfly.web3j.services.Web3Service;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/ethereum/src/test/java/com/baeldung/web3j/services/EthereumContractUnitTest.java b/ethereum/src/test/java/com/isharkfly/web3j/services/EthereumContractUnitTest.java
similarity index 93%
rename from ethereum/src/test/java/com/baeldung/web3j/services/EthereumContractUnitTest.java
rename to ethereum/src/test/java/com/isharkfly/web3j/services/EthereumContractUnitTest.java
index ff02659bd5..30028ca27b 100644
--- a/ethereum/src/test/java/com/baeldung/web3j/services/EthereumContractUnitTest.java
+++ b/ethereum/src/test/java/com/isharkfly/web3j/services/EthereumContractUnitTest.java
@@ -1,4 +1,4 @@
-package com.baeldung.web3j.services;
+package com.isharkfly.web3j.services;
 
 import org.junit.After;
 import org.junit.Before;
diff --git a/pom.xml b/pom.xml
index c0ee250fd5..deea60dd64 100644
--- a/pom.xml
+++ b/pom.xml
@@ -41,6 +41,7 @@
     <modules>
         <module>apache</module>
         <module>core-java-modules</module>
+        <module>ethereum</module>
         <module>image-compressing</module>
         <module>image-processing</module>
         <module>libraries-jackson</module>
@@ -75,8 +76,6 @@
         <commons-cli.version>1.4</commons-cli.version>
         <commons-io.version>2.11.0</commons-io.version>
 
-
-
         <!-- UTILS -->
         <guava.version>31.1-jre</guava.version>
         <lombok.version>1.18.28</lombok.version>
@@ -84,6 +83,7 @@
         <colt.version>1.2.0</colt.version>
         <trove4j.version>3.0.3</trove4j.version>
         <fastutil.version>5.0.9</fastutil.version>
+        <jstl.version>1.2</jstl.version>
 
         <!-- Hibernate / JPA -->
         <jakarta.persistence.version>3.2.0-M2</jakarta.persistence.version>