The 2.2 release of web3j has just gone out, which contains some great enhancements. Querying the blockchain web3j now makes it really simple to query historical data from the Ethereum blockchain (and of course Quorum). Its API has been enhanced allowing you to provide a range of blocks to replay, […]
I gave a tech talk at Pivotal Labs today on developing Java applications on the Ethereum blockchain. The slides are available below. Thanks to Lawrence and Nicola at Pivotal for putting on a great event.
This article was originally published on the Oracle Technology Network. In a recent issue of Java Magazine, I provide a primer on working with the blockchain technology Ethereum using web3j to build Java applications on it. In this article, we’re going to use web3j’s reactive-functional API to shed some light on […]
Last night I gave a brief web3j 2.0 update at the Sydney Ethereum Meetup. The slides accompanying the talk are available below. Thanks to Nathan and Nick for organising a great event as always.
web3j now seamlessly integrates with the Spring Framework, thanks to the web3j Spring Boot Starter. Using Spring Boot, it's trivial to create production-ready services using web3j to work with the Ethereum blockchain. Start by creating a new Spring Boot application. Then add the web3j-spring-boot-starter to your Gradle or Maven configuration: […]
I'm happy to announce the 2.0 web3j release. This builds on the reactive-functional API added in v1.1.0 and provides a number of further enhancements, including: Transaction managers Transaction managers allow you to choose how you transact with Ethereum clients via web3j's smart contract wrappers. For instance, you can now choose […]
Head over to web3j.io to check it out. Thanks to Start Bootstrap for the awesome Creative theme.
The January/February issue of Java Magazine contains an introductory article I wrote on developing Java applications on the Ethereum blockchain with web3j. The magazine is free to read. Click preview this issue if you don't wish to provide your email address to access.
web3j's command line tools are now available on the excellent OS X package manager Homebrew. To install simply run: And away you go: For more information on using the command line tools, check out this post and the web3j documentation.
I recently purchased a Ledger Nano S which is a great little hardware wallet that caters for both Bitcoin and Ether. Prior to purchasing my hardware wallet I had a lot of Ether in Ethereum wallet files on disk, which isn't a sustainable strategy for storing any cryptocurrency. Using the […]