ethereumj | Java implementation of the Ethereum yellowpaper | Blockchain library
kandi X-RAY | ethereumj Summary
kandi X-RAY | ethereumj Summary
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. We keep EthereumJ as thin as possible. For JSON-RPC support and other client features check Ethereum Harmony.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Compiles the Ethereum contract
- Sends transaction and returns transaction
- Waits for a transaction to be received
- Converts a multiline code into a string
- Returns a mask that can be reachable by the given code
- Format the given byte data as a hex string
- Loops the block download
- Adds blocks to the queue
- Loops over the headers download request
- Add block headers
- Processes the block and returns the list of transactions that belong to
- Checks that the given block s uncle list is valid
- Compares this object to another
- Starts the client
- Generates a sequence of bytes from the output buffer
- Decode frames
- Handles a P2P command
- Re - branch block
- Produce a queue of blocks to be processed
- Loads the block from the database
- Replay a block
- Generate bytes from the given output buffer
- Dump the contents of a block
- This method will block until all headers have received
- Adds a nonce to a block
- Pads the block
ethereumj Key Features
ethereumj Examples and Code Snippets
Community Discussions
Trending Discussions on ethereumj
QUESTION
I'm trying to install the package @truffle/hdwallet-provider .
As written in the doc, I'm running:
...ANSWER
Answered 2022-Mar-08 at 14:23Actually, it's a well-known bug. https://github.com/trufflesuite/truffle/issues/2852
Using this solved the problem:
QUESTION
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.
...ANSWER
Answered 2022-Jan-23 at 09:25That 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.
QUESTION
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?
ANSWER
Answered 2022-Jan-14 at 00:51This 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.
QUESTION
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:
...ANSWER
Answered 2021-Dec-06 at 07:42uninstall webpack and install it with latest version again.Then followed webpack.js.org/migrate/5 .Updated all loader withhh configration provided in the article.
QUESTION
Overview
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.
Code
...ANSWER
Answered 2021-Sep-08 at 19:48So, 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.
QUESTION
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:
...ANSWER
Answered 2021-Sep-06 at 05:19According to this
QUESTION
OVERVIEW
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
PROBLEM
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: https://web3js.readthedocs.io/en/v1.4.0/index.html ), 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: https://rinkeby.etherscan.io/ ), the transactions are nowhere to be found in the transaction list (completed, pending, failed, outgoing and incoming transactions).
QUESTIONS
- 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?
NOTE
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.
CODE
...ANSWER
Answered 2021-Sep-02 at 22:29Ok, I've found out that the code was incomplete and I needed to implement more things. Here is the code completed and 100% working.
QUESTION
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:
...ANSWER
Answered 2021-Aug-01 at 11:29I did refactor your code, for improve it. And fixed issues you wanted to solve.
QUESTION
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:
...ANSWER
Answered 2021-Jun-14 at 08:58In order to use the .send({from: ...}) method, you need to
Have the
fromaccount unlocked on your provider.OR
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.
QUESTION
I'm trying to add Web3 to a React project. I've initalized a new project with
...ANSWER
Answered 2021-Apr-26 at 09:19Unfortunately, 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
Use a different library or approach
Add client-side package via CDN
Load client-side dependent components with loadable-components
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.
gatsby-browser.js
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install ethereumj
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 maven.apache.org. For Gradle installation, please refer gradle.org .
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
