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Andronik Ordian
21 lines
571 B
Markdown
21 lines
571 B
Markdown
# Chain API
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The Chain API subsystem is responsible for providing a single point of access to chain state data via a set of pre-determined queries.
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## Protocol
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Input: [`ChainApiMessage`](../../types/overseer-protocol.md#chain-api-message)
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Output: None
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## Functionality
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On receipt of `ChainApiMessage`, answer the request and provide the response to the side-channel embedded within the request.
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Currently, the following requests are supported:
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* Block hash to number
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* Block hash to header
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* Finalized block number to hash
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* Last finalized block number
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* Ancestors
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