Build event-driven applications on the Blockchain with ease. Respond dynamically when participants on your chain submit state changes, or transactions that require coordination between multiple parties to complete.
Connect your on-chain data, to your off-chain systems of record. Drive updates into your systems of record as the state changes in the shared ledger, triggering business processes, applications and notifications.
Build an off-chain cache of on-chain data, for end-user Mobile and Web experiences that perform high-volume data query to the on-chain data. Stream data to your analytics data-lake, or real-time analytics platform, to drive actionable insights from your consortium shared ledger.
Kaleido Event Streams perform at-least once delivery of Ethereum events from your blockchain node, to any REST HTTPS endpoint.
The events are delivered as simple JSON payloads, with all of the complexities of Ethereum topics, RLP encoding and type mapping handled for you. Just provide a simple service that delivers the payload to your chosen backend, pre-batched by the event stream.
The subscription interface is integrated with the REST API Gateway, so subscribing to events is a simple API call. You can subscribe to events on a contract instance, by instance basis. Or subscribe to all events of a given signature on the chain.
Define the target to deliver the events to, and we take care of the rest
Use the Event Streams service within the REST API Gateway to consume and log events emitted from your deployed smart contracts and send them to a target of your choice. In order to leverage the Kaleido Event Streams Service, your smart contract requires an event interface which is used to specify contract parameters for indexing.
The indexed arguments of an event will be stored on-chain in the transaction’s log when a function with the applied event is invoked, and the event payload can then be consumed by a client side app or streaming service that is subscribed to the contract. Kaleido simplifies events by allowing you to specify your own custom event destination URL along with an organizational-controlled API bearer token for added security protections.