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Eventeum

Useful Eventeum articles

Eventeum

3

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craig
Beginner

Listening to Ethereum Events with Eventeum

What is Eventeum? Eventeum is an Ethereum event listener service that provides a bridge between your smart contracts and middleware layer. Events subscriptions can be registered dynamically, and on emission, a message containing the details of the event are broadcast onto a message bus (currently either Kafka or RabbitMQ) which can then be consumed by your backend services. It was developed by the kauri.io team, and the source code is freely available under the Apache 2.0 license. Click here to

Craig Williams

5 min read

06 Aug 19

Listening for Ethereum Transactions with Eventeum

In this tutorial we will walk through how to use Eventeum to be notified when certain transactions have been mined within the Ethereum network. What is Eventeum? Eventeum is an Ethereum event listener service that provides a bridge between the Ethereum network and your middleware layer. Eventeum supports both smart contract event and transaction subscriptions. These subscriptions can be registered dynamically, and when the subscribed event occurs, a message containing the details of the event ar

Craig Williams

6 min read

26 Sep 19

Intermediate

Using Eventeum to Build a Java Smart Contract Data Cache

In this tutorial, I am going to walk you through how to build a service that caches data emitted via smart contract events, so that this data can be consumed by other services in your system. Why would I want to do this? It all boils down to usability of your dApp. Web3 applications with no middleware layer at all generally do not provide the kind of user experience that end users are familiar with in the traditional web2 world. Operations such as complex searches across data stored within smart

Craig Williams

10 min read

14 Apr 19