Chain API

The Chain API subsystem is responsible for providing a single point of access to chain state data via a set of pre-determined queries.

Protocol

Input: ChainApiMessage

Output: None

Functionality

On receipt of ChainApiMessage, answer the request and provide the response to the side-channel embedded within the request.

Currently, the following requests are supported:

• Block hash to number
• Block hash to header
• Block weight
• Finalized block number to hash
• Last finalized block number
• Ancestors