Welcome to EthereumJ for Android

About

EthereumJ is a pure-Java implementation of the Ethereum protocol. For high-level information about Ethereum and its goals, visit ethereum.org. The ethereum white paper provides a complete conceptual overview, and the yellow paper provides a formal definition of the protocol.

This is an Android-optimized fork of EthereumJ.

This repository consists of:

• ethereum-core: a android compatible library of ethereumj-core .
• [app]: a simple mockup GUI for exploring Ethereum functionality and usage.

Deviations from EthereumJ

Code:

• replaced Spring Framework Dependency Injection with Dagger 2 DI;
• replaced org.springframework.util.FileSystemUtils with org.apache.commons.io.FileUtils;
• replaced some worldManager injections with specific item injections from worldManager which were used;
• replaced org.springframework.util.StringUtils.isEmpty with String.isEmpty();
• replaced @PostConstruct annotation with explicit method invocation in contructor;
• replaced java.nio.file.Files with org.apache.commons.io.FileUtils;
• replaced javax.xml.bind.DatatypeConverter.hexStringToByteArray with custom implementation;
• commented javax.swing references in Utils.java;

Gradle:

• changed from java build to android build;
• updated netty-all from 4.0.23 to 4.0.28;
• disabled org.antlr:antlr4-runtime:4.5 ( use 4.0 from com.yuvalshavit:antlr-denter:1.1 );
• replaced org.slf4j:slf4j-api:1.7.7 with org.slf4j:slf4j-android:1.7.12
• removed org.javassist:javassist:3.15.0-GA;
• removed log4j:log4j:${log4jVersion};
• removed org.hibernate:hibernate-core:${hibernateVersion};
• removed org.hibernate:hibernate-entitymanager:${hibernateVersion};
• removed commons-dbcp:commons-dbcp:1.4;
• removed redis.clients:jedis:2.6.0;
• removed org.slf4j:slf4j-log4j12:${slf4jVersion};
• removed log4j:apache-log4j-extras:${log4jVersion};

Todo

• Android-specific BlockStore Implementation
• Unit Tests

This is a work in progress.

Gotchas

Old devices will fail to auth in time and will be rejected by peers, please use modern devices.

Building from source

• Clone this repository and run (make sure clean from previous builds) ./gradlew build
• Install onto Android Device adb install -r app/build/outputs/apk/app-debug.apk

License

EthereumJ is released under the MIT license.