{"id":13757662,"url":"https://github.com/ethereum/ethereumj","last_synced_at":"2025-08-01T16:34:11.189Z","repository":{"id":16967936,"uuid":"19730456","full_name":"ethereum/ethereumj","owner":"ethereum","description":"DEPRECATED! Java implementation of the Ethereum yellowpaper. 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If you have any question or would like to contribute find us on [Gitter](https://gitter.im/ethereum/ethereumj).\n\n\n# About\nEthereumJ is a pure-Java implementation of the Ethereum protocol. For high-level information about Ethereum and its goals, visit [ethereum.org](https://ethereum.org). The [ethereum white paper](https://github.com/ethereum/wiki/wiki/White-Paper) provides a complete conceptual overview, and the [yellow paper](http://gavwood.com/Paper.pdf) provides a formal definition of the protocol.\n\nWe keep EthereumJ as thin as possible. For [JSON-RPC](https://github.com/ethereum/wiki/wiki/JSON-RPC) support and other client features check [Ethereum Harmony](https://github.com/ether-camp/ethereum-harmony).\n\n# Running EthereumJ\n\n##### Adding as a dependency to your Maven project: \n\n```\n   \u003cdependency\u003e\n     \u003cgroupId\u003eorg.ethereum\u003c/groupId\u003e\n     \u003cartifactId\u003eethereumj-core\u003c/artifactId\u003e\n     \u003cversion\u003e1.12.0-RELEASE\u003c/version\u003e\n   \u003c/dependency\u003e\n```\n\n##### or your Gradle project: \n\n```\n   repositories {\n       mavenCentral()\n       jcenter()\n       maven { url \"https://dl.bintray.com/ethereum/maven/\" }\n   }\n   implementation \"org.ethereum:ethereumj-core:1.9.+\"\n```\n\nAs a starting point for your own project take a look at https://github.com/ether-camp/ethereumj.starter\n\n##### Building an executable JAR\n```\ngit clone https://github.com/ethereum/ethereumj\ncd ethereumj\ncp ethereumj-core/src/main/resources/ethereumj.conf ethereumj-core/src/main/resources/user.conf\nvim ethereumj-core/src/main/resources/user.conf # adjust user.conf to your needs\n./gradlew clean fatJar\njava -jar ethereumj-core/build/libs/ethereumj-core-*-all.jar\n```\n\n##### Running from command line:\n```\n\u003e git clone https://github.com/ethereum/ethereumj\n\u003e cd ethereumj\n\u003e ./gradlew run [-PmainClass=\u003csample class\u003e]\n```\n\n##### Optional samples to try:\n```\n./gradlew run -PmainClass=org.ethereum.samples.BasicSample\n./gradlew run -PmainClass=org.ethereum.samples.FollowAccount\n./gradlew run -PmainClass=org.ethereum.samples.PendingStateSample\n./gradlew run -PmainClass=org.ethereum.samples.PriceFeedSample\n./gradlew run -PmainClass=org.ethereum.samples.PrivateMinerSample\n./gradlew run -PmainClass=org.ethereum.samples.TestNetSample\n./gradlew run -PmainClass=org.ethereum.samples.TransactionBomb\n```\n\n##### For snapshot builds:\nPlease, note, snapshots are not stable and are currently in development! If you still want to try it:\n\n - Add https://oss.jfrog.org/libs-snapshot/ as a repository to your build script\n - Add a dependency on `org.ethereum:ethereumj-core:${VERSION}`, where `${VERSION}` is of the form `1.13.0-SNAPSHOT`.\n\nExample:\n\n    \u003crepository\u003e\n        \u003cid\u003ejfrog-snapshots\u003c/id\u003e\n        \u003cname\u003eoss.jfrog.org\u003c/name\u003e\n        \u003curl\u003ehttps://oss.jfrog.org/libs-snapshot/\u003c/url\u003e\n        \u003csnapshots\u003e\u003cenabled\u003etrue\u003c/enabled\u003e\u003c/snapshots\u003e\n    \u003c/repository\u003e\n    \u003c!-- ... --\u003e\n    \u003cdependency\u003e\n       \u003cgroupId\u003eorg.ethereum\u003c/groupId\u003e\n       \u003cartifactId\u003eethereumj-core\u003c/artifactId\u003e\n       \u003cversion\u003e1.13.0-SNAPSHOT\u003c/version\u003e\n    \u003c/dependency\u003e\n\n##### Importing project to IntelliJ IDEA: \n```\n\u003e git clone https://github.com/ethereum/ethereumj\n\u003e cd ethereumj\n\u003e gradlew build\n```\n  IDEA: \n* File -\u003e New -\u003e Project from existing sources…\n* Select ethereumj/build.gradle\n* Dialog “Import Project from gradle”: press “OK”\n* After building run either `org.ethereum.Start`, one of `org.ethereum.samples.*` or create your own main. \n\n# Configuring EthereumJ\n\nFor reference on all existing options, their description and defaults you may refer to the default config `ethereumj.conf` (you may find it in either the library jar or in the source tree `ethereum-core/src/main/resources`) \nTo override needed options you may use one of the following ways: \n* put your options to the `\u003cworking dir\u003e/config/ethereumj.conf` file\n* put `user.conf` to the root of your classpath (as a resource) \n* put your options to any file and supply it via `-Dethereumj.conf.file=\u003cyour config\u003e`, accepts several configs, separated by comma applied in provided order: `-Dethereumj.conf.file=\u003cconfig1\u003e,\u003cconfig2\u003e`\n* programmatically by using `SystemProperties.CONFIG.override*()`\n* programmatically using by overriding Spring `SystemProperties` bean \n\nNote that don’t need to put all the options to your custom config, just those you want to override. \n\n# Special thanks\nYourKit for providing us with their nice profiler absolutely for free.\n\nYourKit supports open source projects with its full-featured Java Profiler.\nYourKit, LLC is the creator of \u003ca href=\"https://www.yourkit.com/java/profiler/\"\u003eYourKit Java Profiler\u003c/a\u003e\nand \u003ca href=\"https://www.yourkit.com/.net/profiler/\"\u003eYourKit .NET Profiler\u003c/a\u003e,\ninnovative and intelligent tools for profiling Java and .NET applications.\n\n![YourKit Logo](https://www.yourkit.com/images/yklogo.png)\n\n# Contact\nChat with us via [Gitter](https://gitter.im/ethereum/ethereumj)\n\n# License\nethereumj is released under the [LGPL-V3 license](LICENSE).\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fethereum%2Fethereumj","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fethereum%2Fethereumj","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fethereum%2Fethereumj/lists"}