1. Nov 12, 2020
  2. Nov 11, 2020
    • Jon Häggblad's avatar
      Companion PR for Substrate #7186 (#1816) · f4eeacc9
      Jon Häggblad authored
      * babe: backoff authoring blocks when finality lags
      
      * service: use default constructor for backoff authoring strat
      
      * slots: update to use renamed backoff strategy name
      
      * "Update Substrate"
      
      Co-authored-by: parity-processbot <>
      f4eeacc9
  3. Nov 09, 2020
  4. Nov 03, 2020
  5. Nov 02, 2020
    • Bastian Köcher's avatar
      Adder collator improvements (#1896) · 96465b04
      Bastian Köcher authored
      * Fixes bug that collator wasn't sending `Declare` message
      
      * Set authority discovery config
      
      * Fixes bug that collator wasn't sending `Declare` message
      
      * Adds real overseer feature and makes the wasm_validation fail with a
      proper error
      
      * Adds README
      
      * Remove debug stuff
      
      * Add feature
      
      * Make adder collator use the correct parent when building a new block
      96465b04
  6. Oct 31, 2020
    • asynchronous rob's avatar
    • Bastian Köcher's avatar
      Adds test parachain adder collator (#1864) · 8cadebb7
      Bastian Köcher authored
      
      
      * start working on building the real overseer
      
      Unfortunately, this fails to compile right now due to an upstream
      failure to compile which is probably brought on by a recent upgrade
      to rustc v1.47.
      
      * fill in AllSubsystems internal constructors
      
      * replace fn make_metrics with Metrics::attempt_to_register
      
      * update to account for #1740
      
      * remove Metrics::register, rename Metrics::attempt_to_register
      
      * add 'static bounds to real_overseer type params
      
      * pass authority_discovery and network_service to real_overseer
      
      It's not straightforwardly obvious that this is the best way to handle
      the case when there is no authority discovery service, but it seems
      to be the best option available at the moment.
      
      * select a proper database configuration for the availability store db
      
      * use subdirectory for av-store database path
      
      * apply Basti's patch which avoids needing to parameterize everything on Block
      
      * simplify path extraction
      
      * get all tests to compile
      
      * Fix Prometheus double-registry error
      
      for debugging purposes, added this to node/subsystem-util/src/lib.rs:472-476:
      
      ```rust
      Some(registry) => Self::try_register(registry).map_err(|err| {
      	eprintln!("PrometheusError calling {}::register: {:?}", std::any::type_name::<Self>(), err);
      	err
      }),
      ```
      
      That pointed out where the registration was failing, which led to
      this fix. The test still doesn't pass, but it now fails in a new
      and different way!
      
      * authorities must have authority discovery, but not necessarily overseer handlers
      
      * fix broken SpawnedSubsystem impls
      
      detailed logging determined that using the `Box::new` style of
      future generation, the `self.run` method was never being called,
      leading to dropped receivers / closed senders for those subsystems,
      causing the overseer to shut down immediately.
      
      This is not the final fix needed to get things working properly,
      but it's a good start.
      
      * use prometheus properly
      
      Prometheus lets us register simple counters, which aren't very
      interesting. It also allows us to register CounterVecs, which are.
      With a CounterVec, you can provide a set of labels, which can
      later be used to filter the counts.
      
      We were using them wrong, though. This pattern was repeated in a
      variety of places in the code:
      
      ```rust
      // panics with an cardinality mismatch
      let my_counter = register(CounterVec::new(opts, &["succeeded", "failed"])?, registry)?;
      my_counter.with_label_values(&["succeeded"]).inc()
      ```
      
      The problem is that the labels provided in the constructor are not
      the set of legal values which can be annotated, but a set of individual
      label names which can have individual, arbitrary values.
      
      This commit fixes that.
      
      * get av-store subsystem to actually run properly and not die on first signal
      
      * typo fix: incomming -> incoming
      
      * don't disable authority discovery in test nodes
      
      * Fix rococo-v1 missing session keys
      
      * Update node/core/av-store/Cargo.toml
      
      * try dummying out av-store on non-full-nodes
      
      * overseer and subsystems are required only for full nodes
      
      * Reduce the amount of warnings on browser target
      
      * Fix two more warnings
      
      * InclusionInherent should actually have an Inherent module on rococo
      
      * Ancestry: don't return genesis' parent hash
      
      * Update Cargo.lock
      
      * fix broken test
      
      * update test script: specify chainspec as script argument
      
      * Apply suggestions from code review
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      
      * Update node/service/src/lib.rs
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      
      * node/service/src/lib: Return error via ? operator
      
      * post-merge blues
      
      * add is_collator flag
      
      * prevent occasional av-store test panic
      
      * simplify fix; expand application
      
      * run authority_discovery in Role::Discover when collating
      
      * distinguish between proposer closed channel errors
      
      * add IsCollator enum, remove is_collator CLI flag
      
      * improve formatting
      
      * remove nop loop
      
      * Fix some stuff
      
      * Adds test parachain adder collator
      
      * Add sudo to Rococo, change session length to 30 seconds and some renaming
      
      * Update to the latest changes on master
      
      * Some fixes
      
      * Fix compilation
      
      * Update parachain/test-parachains/adder/collator/src/lib.rs
      
      Co-authored-by: default avatarSergei Shulepov <[email protected]>
      
      * Review comments
      
      * Downgrade transaction version
      
      * Fixes
      
      * MOARE
      
      * Register notification protocols
      
      * utils: remove unused error
      
      * av-store: more resilient to some errors
      
      * address review nits
      
      * address more review nits
      
      Co-authored-by: default avatarPeter Goodspeed-Niklaus <[email protected]>
      Co-authored-by: default avatarAndronik Ordian <[email protected]>
      Co-authored-by: default avatarFedor Sakharov <[email protected]>
      Co-authored-by: default avatarRobert Habermeier <[email protected]>
      Co-authored-by: default avatarPeter Goodspeed-Niklaus <[email protected]>
      Co-authored-by: default avatarMax Inden <[email protected]>
      Co-authored-by: default avatarSergey Shulepov <[email protected]>
      Co-authored-by: default avatarSergei Shulepov <[email protected]>
      8cadebb7
    • Fedor Sakharov's avatar
      A real overseer feature (#1892) · 20a8a61e
      Fedor Sakharov authored
      
      
      * A real overseer feature
      
      * Fix build without feature
      
      * Update node/service/src/lib.rs
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      
      Co-authored-by: default avatarRobert Habermeier <[email protected]>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      20a8a61e
  7. Oct 29, 2020
  8. Oct 28, 2020
    • Fedor Sakharov's avatar
      Collator protocol should choose side (#1872) · 472d62fd
      Fedor Sakharov authored
      
      
      * Collator protocol should choose side
      
      * Update node/service/src/lib.rs
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      472d62fd
    • Peter Goodspeed-Niklaus's avatar
    • Peter Goodspeed-Niklaus's avatar
      start working on building the real overseer (#1795) · 798f781f
      Peter Goodspeed-Niklaus authored
      
      
      * start working on building the real overseer
      
      Unfortunately, this fails to compile right now due to an upstream
      failure to compile which is probably brought on by a recent upgrade
      to rustc v1.47.
      
      * fill in AllSubsystems internal constructors
      
      * replace fn make_metrics with Metrics::attempt_to_register
      
      * update to account for #1740
      
      * remove Metrics::register, rename Metrics::attempt_to_register
      
      * add 'static bounds to real_overseer type params
      
      * pass authority_discovery and network_service to real_overseer
      
      It's not straightforwardly obvious that this is the best way to handle
      the case when there is no authority discovery service, but it seems
      to be the best option available at the moment.
      
      * select a proper database configuration for the availability store db
      
      * use subdirectory for av-store database path
      
      * apply Basti's patch which avoids needing to parameterize everything on Block
      
      * simplify path extraction
      
      * get all tests to compile
      
      * Fix Prometheus double-registry error
      
      for debugging purposes, added this to node/subsystem-util/src/lib.rs:472-476:
      
      ```rust
      Some(registry) => Self::try_register(registry).map_err(|err| {
      	eprintln!("PrometheusError calling {}::register: {:?}", std::any::type_name::<Self>(), err);
      	err
      }),
      ```
      
      That pointed out where the registration was failing, which led to
      this fix. The test still doesn't pass, but it now fails in a new
      and different way!
      
      * authorities must have authority discovery, but not necessarily overseer handlers
      
      * fix broken SpawnedSubsystem impls
      
      detailed logging determined that using the `Box::new` style of
      future generation, the `self.run` method was never being called,
      leading to dropped receivers / closed senders for those subsystems,
      causing the overseer to shut down immediately.
      
      This is not the final fix needed to get things working properly,
      but it's a good start.
      
      * use prometheus properly
      
      Prometheus lets us register simple counters, which aren't very
      interesting. It also allows us to register CounterVecs, which are.
      With a CounterVec, you can provide a set of labels, which can
      later be used to filter the counts.
      
      We were using them wrong, though. This pattern was repeated in a
      variety of places in the code:
      
      ```rust
      // panics with an cardinality mismatch
      let my_counter = register(CounterVec::new(opts, &["succeeded", "failed"])?, registry)?;
      my_counter.with_label_values(&["succeeded"]).inc()
      ```
      
      The problem is that the labels provided in the constructor are not
      the set of legal values which can be annotated, but a set of individual
      label names which can have individual, arbitrary values.
      
      This commit fixes that.
      
      * get av-store subsystem to actually run properly and not die on first signal
      
      * typo fix: incomming -> incoming
      
      * don't disable authority discovery in test nodes
      
      * Fix rococo-v1 missing session keys
      
      * Update node/core/av-store/Cargo.toml
      
      * try dummying out av-store on non-full-nodes
      
      * overseer and subsystems are required only for full nodes
      
      * Reduce the amount of warnings on browser target
      
      * Fix two more warnings
      
      * InclusionInherent should actually have an Inherent module on rococo
      
      * Ancestry: don't return genesis' parent hash
      
      * Update Cargo.lock
      
      * fix broken test
      
      * update test script: specify chainspec as script argument
      
      * Apply suggestions from code review
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      
      * Update node/service/src/lib.rs
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      
      * node/service/src/lib: Return error via ? operator
      
      * post-merge blues
      
      * add is_collator flag
      
      * prevent occasional av-store test panic
      
      * simplify fix; expand application
      
      * run authority_discovery in Role::Discover when collating
      
      * distinguish between proposer closed channel errors
      
      * add IsCollator enum, remove is_collator CLI flag
      
      * improve formatting
      
      * remove nop loop
      
      * Fix some stuff
      
      Co-authored-by: default avatarAndronik Ordian <[email protected]>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      Co-authored-by: default avatarFedor Sakharov <[email protected]>
      Co-authored-by: default avatarRobert Habermeier <[email protected]>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      Co-authored-by: default avatarMax Inden <[email protected]>
      798f781f
  9. Oct 27, 2020
  10. Oct 26, 2020
  11. Oct 25, 2020
  12. Oct 21, 2020
  13. Oct 15, 2020
  14. Oct 13, 2020
  15. Oct 12, 2020
  16. Oct 09, 2020
    • Bastian Köcher's avatar
      Rename `node_handles` to `overseer_handler` (#1803) · 15ba4efd
      Bastian Köcher authored
      They are not node handles anymore ;)
      15ba4efd
    • Bastian Köcher's avatar
      Remove `collating_for` argument from service (#1802) · 6b4225f5
      Bastian Köcher authored
      The collator is now enabled in a different way and we don't require this
      argument anymore.
      6b4225f5
    • Rakan Alhneiti's avatar
      Update to work with async keystore – Companion PR for #7000 (#1740) · bc7d1322
      Rakan Alhneiti authored
      
      
      * Fix keystore types
      
      * Use SyncCryptoStorePtr
      
      * Borrow keystore
      
      * Fix unused imports
      
      * Fix polkadot service
      
      * Fix bitfield-distribution tests
      
      * Fix indentation
      
      * Fix backing tests
      
      * Fix tests
      
      * Fix provisioner tests
      
      * Removed SyncCryptoStorePtr
      
      * Fix services
      
      * Address PR feedback
      
      * Address PR feedback - 2
      
      * Update CryptoStorePtr imports to be from sp_keystore
      
      * Typo
      
      * Fix CryptoStore import
      
      * Document the reason behind using filesystem keystore
      
      * Remove VALIDATORS
      
      * Fix duplicate dependency
      
      * Mark sp-keystore as optional
      
      * Fix availability distribution
      
      * Fix call to sign_with
      
      * Fix keystore usage
      
      * Remove tokio and fix parachains Cargo config
      
      * Typos
      
      * Fix keystore dereferencing
      
      * Fix CryptoStore import
      
      * Fix provisioner
      
      * Fix node backing
      
      * Update services
      
      * Cleanup dependencies
      
      * Use sync_keystore
      
      * Fix node service
      
      * Fix node service - 2
      
      * Fix node service - 3
      
      * Rename CryptoStorePtr to SyncCryptoStorePtr
      
      * "Update Substrate"
      
      * Apply suggestions from code review
      
      * Update node/core/backing/Cargo.toml
      
      * Update primitives/src/v0.rs
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      
      * Fix wasm build
      
      * Update Cargo.lock
      
      Co-authored-by: parity-processbot <>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      bc7d1322
  17. Oct 08, 2020
    • Peter Goodspeed-Niklaus's avatar
      Remove old service, 3rd try (#1776) · ba0d1a32
      Peter Goodspeed-Niklaus authored
      * Remove old service, 3rd try
      
      i.e.
      Revert "Revert "Remove Old Service, 2nd try (#1732)" (#1758)"
      
      This reverts commit c80f7b6b.
      
      Closes #1757.
      
      We now have some evidence that the polkadot validator was producing
      blocks after all; the reason the blocks_constructed metric was 0 was
      that as a new metric it hadn't yet been incorporated into that
      branch's codebase. See
      https://github.com/paritytech/polkadot/issues/1757#issuecomment-700977602
      
      
      
      As this PR is based on a newer `master` branch than the previous one,
      that should hopefully no longer be an issue.
      
      * paras trait now has an Origin type
      
      * initial work running a two node local net
      
      * use the right incantations so the nodes produce blocks together
      
      * improve internal documentation
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      ba0d1a32
  18. Sep 28, 2020
  19. Sep 18, 2020
    • Jon Häggblad's avatar
      Companion PR for #6215 (#1654) · e9a004b9
      Jon Häggblad authored
      
      
      * Companion PR for #6215
      
      * rpc: fix reviewer comments
      
      * "Update Substrate"
      
      Co-authored-by: parity-processbot <>
      Co-authored-by: default avatarAndré Silva <[email protected]>
      e9a004b9
    • Peter Goodspeed-Niklaus's avatar
      c68aee35
    • Peter Goodspeed-Niklaus's avatar
      Remove service, migrate all to service-new (#1630) · af14ea54
      Peter Goodspeed-Niklaus authored
      * import rococo into chain-spec
      
      * make a few stabs at moving forward
      
      * wip: rococo readme
      
      * remove /service crate
      
      - Move the chain-spec files to node-service
      - update sufficient cargo files that polkadot-service-new builds
      - not everything else builds yet
      
      * wip: chase down some build errors in polkadot-cli
      
      There's a lot more to go, but some progress has happened.
      
      * make more progress getting polkadot-cli to build
      
      * don't ignore polkadot.json within the res directory
      
      * don't recreate pathbufs
      
      * Prepare Polkadot to be used by Cumulus
      
      This begins to make Polkadot usable from Cumulus.
      
      * Remove old test
      
      * migrate new_chain_ops fix from /service
      
      * partially remove node/test-service
      
      * Reset some changes
      
      * Revert "partially remove node/test-service"
      
      This reverts commit 7b8f9ba5.
      
      * WIP: replace v0 ParachainHost impl with v1 for test runtime
      
      This is necessary because one of the current errors when building
      the test service boils down to:
      
      the trait bound `polkadot_test_runtime::RuntimeApiImpl<...>`:
        `polkadot_primitives::v1::ParachainHost<...>` is not satisfied
      
      This is WIP because it appears to be causing some std leakage into
      the wasm environment, or something; the compiler is currently
      complaining about duplicate definitions of `panic_handler` and `oom`.
      Presumably I have to identify all std types (Vec etc) and replace
      them with sp_std equivalents.
      
      * fix test runtime build
      
      it wasn't std leakage, after all
      
      * bump westend spec version
      
      * use service-new as service within cli
      
      * to revert: demo that forwarding the test runtime to the real impl blows up
      
      * Revert "to revert: demo that forwarding the test runtime to the real impl blows up"
      
      This reverts commit 68d2f385.
      
      * Revert "Revert "to revert: demo that forwarding the test runtime to the real impl blows up""
      
      This reverts commit 04cb1cbf.
      
      Might have just forgotten to disable default features
      
      * More reverts
      
      * MOARE
      
      * plug in the runtime as the generic instantiation
      
      This feels closer to a solution, but it still has problems: in particular,
      it's assumed that Runtime implements all appropriate Trait traits,
      which this one apparently does not.
      
      * implement necessary traits to get the test runtime compiling
      
      This is almost certainly not correct in some way; it really
      looks like I need to mess with the construct_runtime! macro
      somehow, to inject the inclusion trait's event type as a Event
      variant. Still, better lock down this changeset while it all
      compiles.
      
      * add inclusion::Event as variant into Event enum
      
      * implement unimplemented bits in kusama
      
      * implement unimplemented bits in polkadot runtime
      
      * implement unimplemented bits in westend runtime
      
      * migrate client upgrades from master
      
      * update test service with new node changes
      
      * package metadata--that wasn't intended to be removed
      
      * add parachains v1 modules to each runtime
      
      It's not clear what precisely this does, but it's probably the right
      thing to do.
      
      * enable cli to opt out of full node features
      
      * adjust rococo chainspec per example
      
      https://github.com/paritytech/polkadot/blob/26f1fa47f7836ab4bee5d4aad127ebce748320dd/service/src/chain_spec.rs#L362
      
      
      
      * try to fix Cargo.lock
      
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      Co-authored-by: default avatarAndronik Ordian <[email protected]>
      af14ea54
  20. Sep 16, 2020
  21. Sep 14, 2020
  22. Sep 01, 2020
  23. Aug 24, 2020
  24. Aug 18, 2020
    • ordian's avatar
      initial prometheus metrics (#1536) · 804958ab
      ordian authored
      * service-new: cosmetic changes
      
      * overseer: draft of prometheus metrics
      
      * metrics: update active_leaves metrics
      
      * metrics: extract into functions
      
      * metrics: resolve XXX
      
      * metrics: it's ugly, but it works
      
      * Bump Substrate
      
      * metrics: move a bunch of code around
      
      * Bumb substrate again
      
      * metrics: fix a warning
      
      * fix a warning in runtime
      
      * metrics: statements signed
      
      * metrics: statements impl RegisterMetrics
      
      * metrics: refactor Metrics trait
      
      * metrics: add Metrics assoc type to JobTrait
      
      * metrics: move Metrics trait to util
      
      * metrics: fix overseer
      
      * metrics: fix backing
      
      * metrics: fix candidate validation
      
      * metrics: derive Default
      
      * metrics: docs
      
      * metrics: add stubs for other subsystems
      
      * metrics: add more stubs and fix compilation
      
      * metrics: fix doctest
      
      * metrics: move to subsystem
      
      * metrics: fix candidate validation
      
      * metrics: bitfield signing
      
      * metrics: av store
      
      * metrics: chain API
      
      * metrics: runtime API
      
      * metrics: stub for avad
      
      * metrics: candidates seconded
      
      * metrics: ok I gave up
      
      * metrics: provisioner
      
      * metrics: remove a clone by requiring Metrics: Sync
      
      * metrics: YAGNI
      
      * metrics: remove another TODO
      
      * metrics: for later
      
      * metrics: add parachain_ prefix
      
      * metrics: s/signed_statement/signed_statements
      
      * utils: add a comment for job metrics
      
      * metrics: address review comments
      
      * metrics: oops
      
      * metrics: make sure to save files before commit 😅
      
      
      
      * use _total suffix for requests metrics
      
      Co-authored-by: default avatarMax Inden <[email protected]>
      
      * metrics: add tests for overseer
      
      * update Cargo.lock
      
      * overseer: add a test for CollationGeneration
      
      * collation-generation: impl metrics
      
      * collation-generation: use kebab-case for name
      
      * collation-generation: add a constructor
      
      Co-authored-by: default avatarGav Wood <[email protected]>
      Co-authored-by: default avatarAshley Ruglys <[email protected]>
      Co-authored-by: default avatarMax Inden <[email protected]>
      804958ab
  25. Aug 17, 2020
    • Wei Tang's avatar
      Companion PR for #6862 (#1564) · c435c187
      Wei Tang authored
      
      
      * Companion PR for #6862
      
      * Check in Cargo.lock for CI
      
      * "Update Substrate"
      
      * update substrate
      
      Co-authored-by: parity-processbot <>
      Co-authored-by: default avatarAndré Silva <[email protected]>
      c435c187
    • Peter Goodspeed-Niklaus's avatar
      implement collation generation subsystem (#1557) · e750a825
      Peter Goodspeed-Niklaus authored
      * start sketching out a collation generation subsystem
      
      * invent a basic strategy for double initialization
      
      * clean up warnings
      
      * impl util requests from runtime assuming a context instead of a FromJob sender
      
      * implement collation generation algorithm from guide
      
      * update AllMessages in tests
      
      * fix trivial review comments
      
      * remove another redundant declaration from merge
      
      * filter availability cores by para_id
      
      * handle new activations each in their own async task
      
      * update guide according to the actual current implementation
      
      * add initialization to guide
      
      * add general-purpose subsystem_test_harness helper
      
      * write first handle_new_activations test
      
      * add test that handle_new_activations filters local_validation_data requests
      
      * add (failing) test of collation distribution message sending
      
      * rustfmt
      
      * broken: work on fixing sender test
      
      Unfortunately, for reasons that are not yet clear, despite the public key
      and checked data being identical, the signer is not producing an identical
      signature. This commit produces this output (among more):
      
      signing with  Public(c4733ab0bbe3ba4c096685d1737a7f498cdbdd167a767d04a21dc7df12b8c858 (5GWHUNm5...))
      checking with Public(c4733ab0bbe3ba4c096685d1737a7f498cdbdd167a767d04a21dc7df12b8c858 (5GWHUNm5...))
      signed payload:  [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 10, 0, 0, 0, c7, e5, c0, 64, 7a, db, fe, 44, 81, e5, 51, 11, 79, 9f, a5, 63, 93, 94, 3c, c4, 36, c6, 30, 36, c2, c5, 44, a2, 1b, db, b7, 82, 3, 17, a, 2e, 75, 97, b7, b7, e3, d8, 4c, 5, 39, 1d, 13, 9a, 62, b1, 57, e7, 87, 86, d8, c0, 82, f2, 9d, cf, 4c, 11, 13, 14]
      checked payload: [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 10, 0, 0, 0, c7, e5, c0, 64, 7a, db, fe, 44, 81, e5, 51, 11, 79, 9f, a5, 63, 93, 94, 3c, c4, 36, c6, 30, 36, c2, c5, 44, a2, 1b, db, b7, 82, 3, 17, a, 2e, 75, 97, b7, b7, e3, d8, 4c, 5, 39, 1d, 13, 9a, 62, b1, 57, e7, 87, 86, d8, c0, 82, f2, 9d, cf, 4c, 11, 13, 14]
      
      * fix broken test
      
      * collation function returns commitments hash
      
      It doesn't look like we use the actual commitments data anywhere, and
      it's not obvious if there are any fields of `CandidateCommitments`
      not available to the collator, so this commit just assigns them the
      entire responsibility of generating the hash.
      
      * add missing overseer impls
      
      * calculating erasure coding is polkadot's responsibility, not cumulus
      
      * concurrentize per-relay_parent requests
      e750a825