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Add some message types from subsystem definitions (#1265)

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* introduce polkadot-node-primitives

* guide: change statement distribution message types

* guide: remove variant from `CandidateSelectionMessage`

* add a few more message types

* add TODOs

* Almost all messages

* NewBackedCandidate notification

* Formatting

* Use AttestedCandidate as BackedCandidate

* Update node/primitives/src/lib.rs

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

* Fix the tests

* Bring in types from #1242

* Adds network bridge messages

* More message types from doc

* use fn pointer type

* Fixes from the review

* Add missing Runtime subsystem message

* rename to CandidateValidationMessage and fix tests

Co-authored-by: Fedor Sakharov <fedor.sakharov@gmail.com>
Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>
This commit is contained in:
Robert Habermeier
2020-06-17 19:49:17 -04:00
committed by GitHub
parent 87ae6e42f5
commit c226c4403d
13 changed files with 477 additions and 52 deletions
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polkadot/roadmap/implementors-guide/src/node/backing/statement-distribution.md
+3 -1
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@@ -38,7 +38,9 @@ The Statement Distribution subsystem sends statements to peer nodes and detects
There is a very simple state machine which governs which messages we are willing to receive from peers. Not depicted in the state machine: on initial receipt of any [`SignedStatement`](../../types/backing.html#signed-statement-type), validate that the provided signature does in fact sign the included data. Note that each individual parablock candidate gets its own instance of this state machine; it is perfectly legal to receive a `Valid(X)` before a `Seconded(Y)`, as long as a `Seconded(X)` has been received.
A: Initial State. Receive `SignedStatement(Statement::Second)`: extract `Statement`, forward to Candidate Backing, proceed to B. Receive any other `SignedStatement` variant: drop it.
B: Receive any `SignedStatement`: extract `Statement`, forward to Candidate Backing. Receive `OverseerMessage::StopWork`: proceed to C.
B: Receive any `SignedStatement`: check signature, forward to Candidate Backing. Receive `OverseerMessage::StopWork`: proceed to C.
C: Receive any message for this block: drop it.
## Peer Knowledge Tracking