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pvf-precheck: update implementers' guide (#4612)

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This commit incorporates the changes made to the runtime in the
following PRs:

- https://github.com/paritytech/polkadot/pull/4408
- https://github.com/paritytech/polkadot/pull/4457
- https://github.com/paritytech/polkadot/pull/4540
- https://github.com/paritytech/polkadot/pull/4542
- https://github.com/paritytech/polkadot/pull/4581

Note that this PR does not include the description of the PVF
pre-checker subsystem. This should be addressed within
https://github.com/paritytech/polkadot/issues/4611

Co-authored-by: sandreim <54316454+sandreim@users.noreply.github.com>
This commit is contained in:
Sergei Shulepov
2021-12-29 14:32:08 +01:00
committed by GitHub
parent cf509bdb51
commit 1394b70d49
10 changed files with 257 additions and 29 deletions
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polkadot/roadmap/implementers-guide/src/node/utility/pvf-prechecker.md
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# PVF Pre-checker
The PVF pre-checker is a subsystem that is responsible for watching the relay chain for new PVFs that require pre-checking. Head over to [overview] for the PVF pre-checking process overview.
## Protocol
There is no dedicated input mechanism for PVF pre-checker. Instead, PVF pre-checker looks on the `ActiveLeavesUpdate` event stream for work.
This subsytem does not produce any output messages either. The subsystem will, however, send messages to the [Runtime API] subsystem to query for the pending PVFs and to submit votes. In addition to that, it will also communicate with [Candidate Validation] Subsystem to request PVF pre-check.
## Functionality
TODO: Write up the description of the functionality of the PVF pre-checker. https://github.com/paritytech/polkadot/issues/4611
[overview]: ../../pvf-prechecking.md
[Runtime API]: runtime-api.md
[Candidate Validation]: candidate-validation.md