Subsystems are now able to receive and send requests and responses via
the overseer.

Request multiplexer is moved to bridge, as there the implementation is
more straight forward as we can specialize on `AllMessages` for the
multiplexing target.

Sending of requests is mostly complete, apart from a few `From`
instances. Receiving is also almost done, initializtion needs to be
fixed and the multiplexer needs to be invoked.

WIP: Does not compile.

It is not protocol related at all, it is in fact only part of the
subsystem communication as it gets wrapped into messages of each
subsystem.

* Conpanion for Substrate#7127

* Use sp_session::OneSessionHandler

* .

* Fix pallet_session::OneSessionHandler

* OneSessionHandler is in frame_support now

* "Update Substrate"

Co-authored-by: parity-processbot <>

* PVD: `block_number`->`relay_parent_number`

* ValidationParams: `relay_chain_height`->`relay_parent_number`

* Expose DMQ MQC hash as a well-known-key

This way the relay storage merkle proofs will be able to obtain the DMQ
MQC hash and we will be able to remove the it from the
PersistedValidationData struct.

* PersistedValidationData: Remove HRMP MQC heads

* PersistedValidationData: Remove `dmq_mqc_head`

* Expose the HRMP ingress channel index as a well-known-key

This way a parachain (PVF and collator) can find all the parachains that
have an outbound channel to the given one. That allows in turn to find
all the inbound channels for the given para.

Having access to that allows the parachain to get the same information
as the hrmp_mqc_heads now provide.

* Rename `relay_storage_root` to `relay_parent_storage_root`

* DMP

* HRMP

* Update runtime/parachains/src/dmp.rs

Co-authored-by: Bastian Köcher <[email protected]>

* grab guide updates from approval-voting branch

* focus on control flow and behavior, not functions

* add approval voting preamble info

* tabs -> spaces

* upgrade codec and bitvec

* "Update Substrate"

Co-authored-by: parity-processbot <>

* Adapt code to changes in substrate

* WIP

* "Update Substrate"

Co-authored-by: parity-processbot <>

* Telemetry API struct renamed

* "Update Substrate"

Co-authored-by: parity-processbot <>

* Companion for #7997

https://github.com/paritytech/substrate/pull/7997



* rename slot_number to slot

* rename SlotNumber type in overseer docs

* "Update Substrate"

Co-authored-by: André Silva <[email protected]>
Co-authored-by: parity-processbot <>

* use executor cache in polkadot-parachain executor

* Update parachain/src/wasm_executor/mod.rs

Co-authored-by: Bastian Köcher <[email protected]>

Co-authored-by: Bastian Köcher <[email protected]>

* use proper descriptive generic type names

* cleanup

* Table stores a list of detected misbehavior per authority

* add Table::drain_misbehaviors_for

* WIP: unify misbehavior types; report multiple misbehaviors per validator

Code checks, but tests don't yet pass.

* update drain_misbehaviors: return authority id as well as specific misbehavior

* enable unchecked construction of Signed structs in tests

* remove test-features feature & unnecessary generic

* fix backing tests

This took a while to figure out, because where we'd previously been
passing around `SignedFullStatement`s, we now needed to construct
those on the fly within the test, to take advantage of the signature-
checking in the constructor. That, in turn, necessitated changing the
iterable type of `drain_misbehaviors` to return the validator index,
and passing that validator index along within the misbehavior report.

Once that was sorted, however, it became relatively straightforward:
just needed to add appropriate methods to deconstruct the misbehavior
reports, and then we could construct the signed statements directly.

* fix bad merge

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.121 to 1.0.123.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.121...v1.0.123

)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps [rand](https://github.com/rust-random/rand) from 0.8.2 to 0.8.3.
- [Release notes](https://github.com/rust-random/rand/releases)
- [Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-random/rand/commits

)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* bump tx version for westend and test-runtime

& bump substrate

* Update runtime/test-runtime/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.120 to 1.0.121.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.120...v1.0.121

)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Use extensible multiaddress

* copy pasta

* Rococo V2

* Do it again!

* Rename

* Companion for #7953: remove runtime checks in prove_finality

* "Update Substrate"

Co-authored-by: parity-processbot <>
Co-authored-by: André Silva <[email protected]>

* Add memory-lru cache to runtime-api

* Add cache.rs

* Adds MallocSizeOf

* Review nits

* Add a cached requests metric

* More review nits

* Some more review nits

* bump version in prep for release

* bump substrate

* bump substrate

* Refact proposal pallet

* Update runtime/rococo/src/propose_parachain.rs

Co-authored-by: Andronik Ordian <[email protected]>

* Fix

* Apply suggestions from code review

Co-authored-by: Andronik Ordian <[email protected]>

* AHH

Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: Andronik Ordian <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>

* update release-bot.yml github action

* fix release-bot.yml

* configure channels

* start graphing message flow between subsystems

This commit includes messages originating from the first three subsystems
(alphabetically).

* use standard arrowhead names

* add messages from bitfield distribution && use circo layout

* finish adding all subsystem message traffic to graph

* reduce line spam

* start work on graphing v1 types

* finish graphing candidate-related structs

* show hash relations, format

* show provenance of ValidityAttestation

* add the rest of the v1 polkadot primitives

* add type diagram from polkadot::parachain::primitives

* start work digramming the path to backing

* diagram message flow from collation generation -> candidate selection

* document flow through CandidateBacking, CandidateValidation

* graph data flow through StatementDistribution

* trace data flow through PoVDistribution to Backing

* finish documenting node side subsystem data flow

* initial impl approval distribution

* initial tests and fixes

* batching seems difficult: different peers have different needs

* bridge: fix test after merge

* some guide updates

* only send assignments to peers who know about the block

* fix a test, add approvals test

* simplify

* do not send assignment to peers for finalized blocks

* guide: protocol input and output

* one more test

* more comments, logs, initial metrics

* fix a typo

* one more thing: early return when reimporting a thing locally

* Add a `convert_payload` function to `Signed`

* Review feedback

* removes old bootnodes from kusama chainspec

* removes old bootnodes from polkadot chainspec