* node/approval-voting: test for invalid validator index in assignments

This commit adds a unit test to show that, currently, validator indexes
greater than n_validators (or the length of the approvals bitvector) are
counted in n_assignments. In the subsequent commit we will correct this
behavior.

* node/approval-voting: ignore invalid validator indexes in n_assignments

This commit ignores any validator assignments whose index is beyond
n_validators. Without this check, an improperly crafted assignment would
be counted towards the approval.

It still remains that n_assignments and count_no_shows inspect the
number of validators and approvals, respectively. Ideally we would
add greater safety around ensuring these two values cannot differ.

* gossip-support: gossip topology

* some fixes

* handle view update for newly added gossip peers

* fix neighbors calculation

* fix test

* resolve TODOs

* typo

* guide updates

* spaces in the guide

* sneaky spaces

* hash randomness

* address some review nits

* use unbounded in bridge for subsystem msg

* Set staking limits

* Set westend limits as well

* Update runtime/kusama/src/lib.rs

Co-authored-by: Gavin Wood <[email protected]>

Co-authored-by: Gavin Wood <[email protected]>

Bumps [derive_more](https://github.com/JelteF/derive_more) from 0.99.11 to 0.99.14.
- [Release notes](https://github.com/JelteF/derive_more/releases)
- [Changelog](https://github.com/JelteF/derive_more/blob/master/CHANGELOG.md)
- [Commits](https://github.com/JelteF/derive_more/compare/v0.99.11...v0.99.14)

---
updated-dependencies:
- dependency-name: derive_more
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

* node/approval-voting: extract and test count_no_shows method

This commit extracts no_show computation into a pure function so that it can be
extensively unit tested.

* node/approval-voting: ignore invalid validator indexes in count_no_show

Previously indexes that were past the length of the approvals bitvector
would contribute to the no_show count or the next_no_show value. This
commit changes the behavior to ignore garbage values.

* node/approval-voting: add comment for next_no_show adding clock_drift

* cleanup more tests and spaces

* oops

* Companion #9019 (max rpc payload override)

* update Substrate

Co-authored-by: parity-processbot <>

* high-level discussion of fork-choice and chain selection

* notes on chain-selection subsystem

* send `Approve` messages from approval-voting

* remove references to candidate-selection

* adjust grandpa voting rule docs

* Update roadmap/implementers-guide/src/node/grandpa-voting-rule.md

Co-authored-by: Lldenaurois <[email protected]>

* Update roadmap/implementers-guide/src/protocol-chain-selection.md

Co-authored-by: Lldenaurois <[email protected]>

* Update roadmap/implementers-guide/src/protocol-chain-selection.md

Co-authored-by: Lldenaurois <[email protected]>

Co-authored-by: Lldenaurois <[email protected]>

* Add XCM Decode Limit of 256

* use `decode_all_*`

* Update xcm/src/double_encoded.rs

* Allow council to use scheduler

* westend doesnt have council

* extract determine_new_blocks into a separate utility

* rework docs

* node/approval_checking: break out filled_tranch_iterator method

In the subsequent commit, we will begin to test this method in
isolation.

* node/approval-voting: fix tranche back-filling algorithm

Previously, this algorithm would generate duplicate, empty entries for
tranches (1..pre_end). This is caused because the initial value (0) for
gap_end is treated as the end of a prior tranche that wasn't actually
processed. The first pass thus would add (1..tranche) empty entries, in
addition to the (0..pre_end) empty entries chained at the end of the
method.

This is fixed by using the current tranche as the gap_start for the
first iteration, ensuring that the approval_entries_filled only produces
entries in the range (pre_end..post_start).

* Address feedback

* bridges: update finality-grandpa

* update Substrate

Co-authored-by: parity-processbot <>

* update weight apis

* update Substrate

Co-authored-by: parity-processbot <>

* Remove Call part imports of the offences and authority discovery pallets

* Remove non-existent Call enum variants

* Move ValidateUnsigned impl to be under #[pallet::validate_unsigned] in claims pallet

* Remove unused imports

* Remove Call part import for randomness collective flip pallet

* update Substrate

Co-authored-by: parity-processbot <>

* Drop guard for detecting stale approvals

* address nits with different API

* update apis

* fix api

* rename to `KillStorageResult`

* update Substrate

Co-authored-by: parity-processbot <>

* bump spec_version and version

* bump substrate

* remove migrations

* Revert "remove migrations"

This reverts commit ceeab924d1cd5c2d3d05f24ab28315f0566f89d8.

* remove stale migration for kusama + westend

* implement dispute participation subsystem

* guide: minor fix in dispute participation

* Update node/core/dispute-participation/src/lib.rs

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

* dispute: add comments to participation logic

* dispute-coordinator: fix test compilation

* implementers-guide: update dispute participation

* dispute-participation: add error for missing validation code

* dispute-participation: add tests

* Update node/core/dispute-participation/src/lib.rs

Co-authored-by: Robert Habermeier <[email protected]>

* guide: update overseer protocol dispute participation message

* dispute-participation: remove duplication in tests

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

* add more information about what's happening during approval work

* record assignment tranches in histogram

* companion

* update Substrate

Co-authored-by: parity-processbot <>

* migrate pallet-randomness-collective-flip to new pallet attr macro

Signed-off-by: koushiro <[email protected]>

* fix some nits

Signed-off-by: koushiro <[email protected]>

* fix

Signed-off-by: koushiro <[email protected]>

* some nits

Signed-off-by: koushiro <[email protected]>

* update Substrate

Co-authored-by: parity-processbot <>

* approval-voting: logs for invalid votes

* proper errors for assignment checks

* proper errors for approval checks

* skeleton for dispute-coordinator

* add coordinator and participation message types

* begin dispute-coordinator DB

* functions for loading

* implement strongly-typed DB transaction

* add some tests for DB transaction

* core logic for pruning

* guide: update candidate-votes key for coordinator

* update candidate-votes key

* use big-endian encoding for session, and implement upper bound generator

* finish implementing pruning

* add a test for note_current_session

* define state of the subsystem itself

* barebones subsystem definition

* control flow

* more control flow

* implement session-updating logic

* trace

* control flow for message handling

* Update node/core/dispute-coordinator/src/lib.rs

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

* Update node/subsystem/src/messages.rs

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

* some more control flow

* guide: remove overlay

* more control flow

* implement some DB getters

* make progress on importing statements

* add SignedDisputeStatement struct

* move ApprovalVote to shared primitives

* add a signing-payload API to explicit dispute statements

* add signing-payload to CompactStatement

* add relay-parent hash to seconded/valid dispute variatns

* correct import

* type-safe wrapper around dispute statements

* use checked dispute statement in message type

* extract rolling session window cache to subsystem-util

* extract session window tests

* approval-voting: use rolling session info cache

* reduce dispute window to match runtime in practice

* add byzantine_threshold and supermajority_threshold utilities to primitives

* integrate rolling session window

* Add PartialOrd to CandidateHash

* add Ord to CandidateHash

* implement active dispute update

* add dispute messages to AllMessages

* add dispute stubs to overseer

* inform dispute participation to participate

* implement issue_local_statement

* implement `determine_undisputed_chain`

* fix warnings

* test harness for dispute coordinator tests

* add more helpers to test harness

* add some more helpers

* some tests for dispute coordinator

* ignore wrong validator indices

* test finality voting rule constraint

* add more tests

* add variants to network bridge

* fix test compilation

* remove most dispute coordinator functionality

as of #3222 we can do most of the work within the approval voting subsystem

* Revert "remove most dispute coordinator functionality"

This reverts commit 9cd615e8eb6ca0b382cbaff525d813e753d6004e.

* Use thiserror

Co-authored-by: Bernhard Schuster <[email protected]>

* Update node/core/dispute-coordinator/src/lib.rs

Co-authored-by: Bernhard Schuster <[email protected]>

* extract tests to separate module

* address nit

* adjust run_iteration API

Co-authored-by: André Silva <[email protected]>
Co-authored-by: Bernhard Schuster <[email protected]>

* update to use pub dispatchables

* update Substrate

* Update claims.rs

* remove warning

Co-authored-by: parity-processbot <>

* create newtype for ValidationCodeHash

* pvf: fix tests compilation

* primitives: fix test compilation