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Network Bridge Refactoring (#1535)

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* rename protocol ID to network capability

* guide: `ProtocolId` -> `NetworkCapability`

* guide: remove `RegisterEventProducer`

* capabilities and expand on underlying network assumptions

* guide: create network.md types file

* guide: network bridge is aware of network messages

* revert changes in code

* Update roadmap/implementers-guide/src/SUMMARY.md

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>

* remove references to NetworkCapability

* Update roadmap/implementers-guide/src/types/network.md

Co-authored-by: Sergei Shulepov <sergei@parity.io>

Co-authored-by: Pierre Krieger <pierre.krieger1708@gmail.com>
Co-authored-by: Sergei Shulepov <sergei@parity.io>
This commit is contained in:
Robert Habermeier
2020-08-05 11:04:05 +02:00
committed by GitHub
parent 1e0ec19945
commit f554868cd4
9 changed files with 244 additions and 97 deletions
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polkadot/roadmap/implementers-guide/src/node/availability/bitfield-distribution.md
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@@ -4,22 +4,21 @@ Validators vote on the availability of a backed candidate by issuing signed bitf
## Protocol
`ProtocolId`: `b"bitd"`: `PeerSet`: `Validation`
`PeerSet`: `Validation`
Input:
[`BitfieldDistributionMessage`](../../types/overseer-protocol.md#bitfield-distribution-message) which are gossiped to all peers, no matter if validator or not.
Output:
- `NetworkBridge::RegisterEventProducer(ProtocolId)` in order to register ourself as an event provider for the protocol.
- `NetworkBridge::SendMessage([PeerId], ProtocolId, Bytes)` gossip a verified incoming bitfield on to interested subsystems within this validator node.
- `NetworkBridge::SendValidationMessage([PeerId], message)` gossip a verified incoming bitfield on to interested subsystems within this validator node.
- `NetworkBridge::ReportPeer(PeerId, cost_or_benefit)` improve or penalize the reputation of peers based on the messages that are received relative to the current view.
- `ProvisionerMessage::ProvisionableData(ProvisionableData::Bitfield(relay_parent, SignedAvailabilityBitfield))` pass
on the bitfield to the other submodules via the overseer.
## Functionality
This is implemented as a gossip system. Register a [network bridge](../utility/network-bridge.md) event producer on startup.
This is implemented as a gossip system.
It is necessary to track peer connection, view change, and disconnection events, in order to maintain an index of which peers are interested in which relay parent bitfields.