ethereumj | Ethereum pure Java implementation | Blockchain library

 by   ethereumj Java Version: Current License: MIT

kandi X-RAY | ethereumj Summary

kandi X-RAY | ethereumj Summary

ethereumj is a Java library typically used in Blockchain, Ethereum applications. ethereumj has no bugs, it has a Permissive License and it has high support. However ethereumj has 1 vulnerabilities and it build file is not available. You can download it from GitHub.

Ethereum pure Java implementation.

            kandi-support Support

              ethereumj has a highly active ecosystem.
              It has 26 star(s) with 24 fork(s). There are 7 watchers for this library.
              It had no major release in the last 6 months.
              ethereumj has no issues reported. There are no pull requests.
              It has a positive sentiment in the developer community.
              The latest version of ethereumj is current.

            kandi-Quality Quality

              ethereumj has 0 bugs and 0 code smells.

            kandi-Security Security

              ethereumj has 1 vulnerability issues reported (1 critical, 0 high, 0 medium, 0 low).
              ethereumj code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              ethereumj is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              ethereumj releases are not available. You will need to build from source code and install.
              ethereumj has no build file. You will be need to create the build yourself to build the component from source.
              ethereumj saves you 12310 person hours of effort in developing the same functionality from scratch.
              It has 24820 lines of code, 2055 functions and 198 files.
              It has high code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed ethereumj and discovered the below as its top functions. This is intended to give you an instant insight into ethereumj implemented functionality, and help decide if they suit your requirements.
            • Create title panel
            • Gets the public key
            • Creates the transaction panel
            • Fill the block
            • Gets the first token generated from a text segment
            • Adds the given token to the document
            • Create the tool bar
            • Compiles an assembly into a machine
            • Returns a list of tokens representing a piece of text
            • Checks if the token is found
            • Returns true if this object equals another
            • Display the slider
            • Decode the RLP data
            • Called when the user selects the block
            • Runs the monitor
            • Initializes a new channel
            • Load wallet file
            • Processes an ELif statement
            • Loads the database
            • Handles a P2P message
            • Validates input
            • Create the block panel
            • Populates the contract details
            • Returns a TokenMap that includes the reserved words to be used in Windows batch files
            • Save wallet file to disk
            • Handles messages
            Get all kandi verified functions for this library.

            ethereumj Key Features

            No Key Features are available at this moment for ethereumj.

            ethereumj Examples and Code Snippets

            No Code Snippets are available at this moment for ethereumj.

            Community Discussions


            Cannot Install NPM Package - Code 128 An unknown git error occurred
            Asked 2022-Mar-08 at 14:23

            I'm trying to install the package @truffle/hdwallet-provider .

            As written in the doc, I'm running:



            Answered 2022-Mar-08 at 14:23

            Actually, it's a well-known bug.

            Using this solved the problem:



            How to create React App including Web3 using create-react-app? I am getting Module not found Error. BREAKING CHANGE: webpack < 5 used
            Asked 2022-Jan-23 at 12:51

            I am new to Web3 and I am trying to create a react app integrated with web3. Below are the steps I followed in Ubuntu.



            Answered 2022-Jan-23 at 09:25

            That is because Webpack 5 no longer does auto-polyfilling for node core modules.

            Simply in order to modify the webpack.config.js in Create React App, you have to run

            npm run eject

            this will create a config directory and inside you will have webpack.config.js.



            Updated using yarn upgrade command but getting warnings to update more
            Asked 2022-Jan-14 at 00:51

            I ran yarn upgrade --latest and I got the below. But I thought I just upgraded why the below is asking me to update again? If so, should I and how to?



            Answered 2022-Jan-14 at 00:51

            This is caused because the latest version of @walletconnect/web3-provider package depends on packages of deprecated version. So even though you upgrade the packages listed in package.json, the package's dependencies are not upgraded, causing the warning. However, upgrading all of them is not recommended because dependency version mismatch can cause issues with the dependent package. The best way is to create PR at the dependency repo to upgrade deps.



            Aafter Upgrade to Webpack 5 yarn start failing
            Asked 2021-Dec-06 at 07:42

            I have upgaded m project Node version with all dependancies now I am attempting upgrade to Webpack 4 to Webpack 5. However when I run npm start I get this error. Strange thing is I don't use applyWebpackOptionsDefaults anywhere and after scouring the node_modules I see that it is used in the webpack lib quite a few times. Can anyone tell me what I am doing wrong? Is there a package I haven't updated? What am I missing?

            Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.

            • options has an unknown property 'before'. These properties are valid: object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, static?, watchFiles?, webSocketServer? }

            Here is the package.json:



            Answered 2021-Dec-06 at 07:42

            uninstall webpack and install it with latest version again.Then followed .Updated all loader withhh configration provided in the article.



            Web3 sending EIP-1559 Transaction Completed Successfully but got back an Error: invalid remainder
            Asked 2021-Sep-08 at 19:48


            I am able to send an EIP-1559 transaction through Rinkeby Testnet with Web3, the transaction completes without any trouble and I do get my Ether in my Metamask Rinkeby Account. The thing is that I am getting an Error: invalid remainder after the transaction completes and my program stops immediately.




            Answered 2021-Sep-08 at 19:48

            So, I've managed to find a solution to this question thanks to Rakz's comment. Here is a working code for a EIP-1559 Transaction.



            Gatsby Cloud fails with npm install error: cannot run ssh: No such file or directory
            Asked 2021-Sep-06 at 05:19

            I have been working on a gatsby website and just now wanted to host it. I have been trying to deploy the site on gatsby cloud but it keeps failing with the error:



            Answered 2021-Sep-06 at 05:19


            Web3 SendSignedTransaction through Infura doesn't appear in the Etherscan transactions list
            Asked 2021-Sep-02 at 22:29


            Hello everyone, I am neither a developer nor a programmer, but I've started this Udacity Blockchain Nanodegree Program and I started programming some blockchain applications.

            From the course I started to code a simple program to send some Ether from one Metamask account to another one, both accounts are in the same testnet (Rinkeby).

            This is what I am using for program so far:

            • Metamask with the 2 accounts in the Rinkeby Testnet.
            • Web3 version 1.5.1
            • ethereumjs-tx version 2.1.2
            • Infura Rinkeby Endpoint


            The problem is that the course is outdated and most of their code doesn't work anymore. So, I started implementing my code after 3 days of searching through the Web3 website ( link: ), I managed to write the code that you can see in the snippet.

            The code throws no errors on my end, and when I check the number of transactions (including the pending ones), the number of transactions keeps increasing each time I run my code. But, when I check the Rinkeby Etherscan website ( link: ), the transactions are nowhere to be found in the transaction list (completed, pending, failed, outgoing and incoming transactions).


            • What is/are the problem/s with my code? How can I solve it/them?
            • How do I calculate the GasPrice and how do I determine the GasLimit? I only want to make a transaction to send X amount of Ether with no data.
            • I tried to use the same GasPrice and GasLimit as Metamask, but it throw me the error "Intrinsic gas too low". Why does it happen? Because, I had no problems using those values with Metamask, and the transaction to send some ether from one of my metamask account to the other took less than 3 minutes to completed (I sent the transaction from the Metamask Plugin).
            • Does the chain's fork has anything to do with this problem? If so, How do I check the correct fork for my two accounts in Metamask?


            I am sharing through the code the private key for the senderAccount because these 2 accounts are only for testing this particular code in the Rinkeby Testnet. I am not planning to use them as wallets.




            Answered 2021-Sep-02 at 22:29

            Ok, I've found out that the code was incomplete and I needed to implement more things. Here is the code completed and 100% working.



            Scroll of "overflow-y" and Dropdown bar doesn't work correctly
            Asked 2021-Aug-01 at 11:29

            My code has two navigation bars. One in vertical and other in horizontal format.

            The first issue:

            I set the vertical bar such that it's scroll is active by this CSS code:



            Answered 2021-Aug-01 at 11:29

            I did refactor your code, for improve it. And fixed issues you wanted to solve.



            BEP-20 Token Transaction on NodeJs
            Asked 2021-Jun-14 at 08:58

            Hi I'm just confused that how to transact BEP-20 Token(e.g: Binance-Peg BUSD-T). I have simply transact bnb in Binance Smart Chain with this code:



            Answered 2021-Jun-14 at 08:58

            In order to use the .send({from: ...}) method, you need to

            • Have the from account unlocked on your provider.


            • Add its private key to the web3 account wallet (docs)

            Ulocked provider account

            This approach is mostly used on local providers (e.g. Ganache) that fund and unlock some accounts by default.

            Keeping an unlocked account on a production provider is unwise, because anyone who queries the provider can send transactions.

            Web3 account wallet

            You need to pass the private key that generates the from address.



            Cannot add web3 to React project
            Asked 2021-Jun-03 at 00:31

            I'm trying to add Web3 to a React project. I've initalized a new project with



            Answered 2021-Apr-26 at 09:19

            Unfortunately, most of the Web3 stack relies heavily on window, browser and external, crypto dependencies which aren't available on server-side. This isn't just an issue with Gatsby, but other SSR and static site generators (e.g. Next.js) as well.

            There are a few workarounds though. See Using Client-Side Only Packages on Gatsby

            1. Use a different library or approach

            2. Add client-side package via CDN

            3. Load client-side dependent components with loadable-components

            4. Use React.lazy and Suspense on client-side only

            Depending on your requirements #1 is likely not an option. I've had better success using ethers, instead of web3. But you'll likely run into similar issues with other packages at some point.

            A combination of #2 and 3/4 will be the way to go. First, remove the packages (web3) that are causing issues and load them either from gatsby-browser.js or using react-helmet on the page/component that's using it.



            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            An issue was discovered in EthereumJ 1.8.2. There is Unsafe Deserialization in ois.readObject in mine/ and decoder.readObject in crypto/ When a node syncs and mines a new block, arbitrary OS commands can be run on the server.

            Install ethereumj

            You can download it from GitHub.
            You can use ethereumj like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the ethereumj component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer For Gradle installation, please refer .


            To start you can visit and if you are looking for more information on the concept, the ethereum white paper is a good place to start as it outlines the vision. For the more technical minded, a protocol description can be found in the yellow paper by Gavin Wood.
            Find more information at:

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          • CLI

            gh repo clone ethereumj/ethereumj

          • sshUrl


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