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a4195326b9
Closes #1591. The purpose of this PR is filter out backing statements from the network signed by disabled validators. This is just an optimization, since we will do filtering in the runtime in #1863 to avoid nodes to filter garbage out at block production time. - [x] Ensure it's ok to fiddle with the mask of manifests - [x] Write more unit tests - [x] Test locally - [x] simple zombienet test - [x] PRDoc --------- Co-authored-by: Tsvetomir Dimitrov <tsvetomir@parity.io>
Backing Subsystems
The backing subsystems, when conceived as a black box, receive an arbitrary quantity of parablock candidates and associated proofs of validity from arbitrary untrusted collators. From these, they produce a bounded quantity of backable candidates which relay chain block authors may choose to include in a subsequent block.
In broad strokes, the flow operates like this:
- Candidate Selection winnows the field of parablock candidates, selecting up to one of them to second.
- Candidate Backing ensures that a seconding candidate is valid, then generates the appropriate
Statement. It also keeps track of which candidates have received the backing of a quorum of other validators. - Statement Distribution is the networking component which ensures that all validators receive each others' statements.
- PoV Distribution is the networking component which ensures that validators considering a candidate can get the appropriate PoV.