availability-recovery.md 714 Bytes
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# Availability Recovery

> TODO: <https://github.com/paritytech/polkadot/issues/1597>

This subsystem is the inverse of the [Availability Distribution](availability-distribution.md) subsystem: validators will serve the availability chunks kept in the availability store to nodes who connect to them. And the subsystem will also implement the other side: the logic for nodes to connect to validators, request availability pieces, and reconstruct the `AvailableData`.

## Protocol

`PeerSet`: `Validation`


- NetworkBridgeUpdateV1(update)
- TODO: input message to request a fetch.


- NetworkBridge::SendValidationMessage
- NetworkBridge::ReportPeer
- AvailabilityStore::QueryChunk

## Functionality