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impl guide: Collator Generation #6938
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impl guide: Collator Generation #6938
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mrcnski/async-backing-impl-guide-collator-generation
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* initial stab at candidate_context * fmt * docs & more TODOs * some cleanups * reframe as inclusion_emulator * documentations yes * update types * add constraint modifications * watermark * produce modifications * v2 primitives: re-export all v1 for consistency * vstaging primitives * emulator constraints: handle code upgrades * produce outbound HRMP modifications * stack. * method for applying modifications * method just for sanity-checking modifications * fragments produce modifications, not prospectives * make linear * add some TODOs * remove stacking; handle code upgrades * take `fragment` private * reintroduce stacking. * fragment constructor * add TODO * allow validating fragments against future constraints * docs * relay-parent number and min code size checks * check code upgrade restriction * check max hrmp per candidate * fmt * remove GoAhead logic because it wasn't helpful * docs on code upgrade failure * test stacking * test modifications against constraints * fmt * test fragments * descending or duplicate test * fmt * remove unused imports in vstaging * wrong primitives * spellcheck
…ech/polkadot into rh-async-backing-feature
* inclusion: utility for allowed relay-parents * inclusion: use prev number instead of prev hash * track most recent context of paras * inclusion: accept previous relay-parents * update dmp advancement rule for async backing * fmt * add a comment about validation outputs * clean up a couple of TODOs * weights * fix weights * fmt * Resolve dmp todo * Restore inclusion tests * Restore paras_inherent tests * MostRecentContext test * Benchmark for new paras dispatchable * Prepare check_validation_outputs for upgrade * cargo run --quiet --profile=production --features=runtime-benchmarks -- benchmark --chain=kusama-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --header=./file_header.txt --output=./runtime/kusama/src/weights/runtime_parachains_paras.rs * cargo run --quiet --profile=production --features=runtime-benchmarks -- benchmark --chain=westend-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --header=./file_header.txt --output=./runtime/westend/src/weights/runtime_parachains_paras.rs * cargo run --quiet --profile=production --features=runtime-benchmarks -- benchmark --chain=polkadot-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --header=./file_header.txt --output=./runtime/polkadot/src/weights/runtime_parachains_paras.rs * cargo run --quiet --profile=production --features=runtime-benchmarks -- benchmark --chain=rococo-dev --steps=50 --repeat=20 --pallet=runtime_parachains::paras --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --header=./file_header.txt --output=./runtime/rococo/src/weights/runtime_parachains_paras.rs * Implementers guide changes * More tests for allowed relay parents * Add a github issue link * Compute group index based on relay parent * Storage migration * Move allowed parents tracker to shared * Compile error * Get group assigned to core at the next block * Test group assignment * fmt * Error instead of panic * Update guide * Extend doc-comment * Update runtime/parachains/src/shared.rs Co-authored-by: Robert Habermeier <rphmeier@gmail.com> Co-authored-by: Chris Sosnin <chris125_@live.com> Co-authored-by: Parity Bot <admin@parity.io> Co-authored-by: Chris Sosnin <48099298+slumber@users.noreply.github.com>
…ech/polkadot into rh-async-backing-feature
* docs and skeleton * subsystem skeleton * main loop * fragment tree basics & fmt * begin fragment trees & view * flesh out more of view update logic * further flesh out update logic * some refcount functions for fragment trees * add fatal/non-fatal errors * use non-fatal results * clear up some TODOs * ideal format for scheduling info * add a bunch of TODOs * some more fluff * extract fragment graph to submodule * begin fragment graph API * trees, not graphs * improve docs * scope and constructor for trees * add some test TODOs * limit max ancestors and store constraints * constructor * constraints: fix bug in HRMP watermarks * fragment tree population logic * set::retain * extract population logic * implement add_and_populate * fmt * add some TODOs in tests * implement child-selection * strip out old stuff based on wrong assumptions * use fatality * implement pruning * remove unused ancestor constraints * fragment tree instantiation * remove outdated comment * add message/request types and skeleton for handling * fmt * implement handle_candidate_seconded * candidate storage: handle backed * implement handle_candidate_backed * implement answer_get_backable_candidate * remove async where not needed * implement fetch_ancestry * add logic for run_iteration * add some docs * remove global allow(unused), fix warnings * make spellcheck happy (despite English) * fmt * bump Cargo.lock * replace tracing with gum * introduce PopulateFrom trait * implement GetHypotheticalDepths * revise docs slightly * first fragment tree scope test * more scope tests * test add_candidate * fmt * test retain * refactor test code * test populate is recursive * test contiguity of depth 0 is maintained * add_and_populate tests * cycle tests * remove PopulateFrom trait * fmt * test hypothetical depths (non-recursive) * have CandidateSeconded return membership * tree membership requests * Add a ProspectiveParachainsSubsystem struct * add a staging API for base constraints * add a `From` impl * add runtime API for staging_validity_constraints * implement fetch_base_constraints * implement `fetch_upcoming_paras` * remove reconstruction of candidate receipt; no obvious usecase * fmt * export message to broader module * remove last TODO * correctly export * fix compilation and add GetMinimumRelayParent request * make provisioner into a real subsystem with proper mesage bounds * fmt * fix ChannelsOut in overseer test * fix overseer tests * fix again * fmt
* BEGIN ASYNC candidate-backing CHANGES * rename & document modes * answer prospective validation data requests * GetMinimumRelayParents request is now plural * implement an implicit view utility for backing subsystems * implicit-view: get allowed relay parents * refactorings and improvements to implicit view * add some TODOs for tests * split implicit view updates into 2 functions * backing: define State to prepare for functional refactor * add some docs * backing: implement bones of new leaf activation logic * backing: create per-relay-parent-states * use new handle_active_leaves_update * begin extracting logic from CandidateBackingJob * mostly extract statement import from job logic * handle statement imports outside of job logic * do some TODO planning for prospective parachains integration * finish rewriting backing subsystem in functional style * add prospective parachains mode to relay parent entries * fmt * add a RejectedByProspectiveParachains error * notify prospective parachains of seconded and backed candidates * always validate candidates exhaustively in backing. * return persisted_validation_data from validation * handle rejections by prospective parachains * implement seconding sanity check * invoke validate_and_second * Alter statement table to allow multiple seconded messages per validator * refactor backing to have statements carry PVD * clean up all warnings * Add tests for implicit view * Improve doc comments * Prospective parachains mode based on Runtime API version * Add a TODO * Rework seconding_sanity_check * Iterate over responses * Update backing tests * collator-protocol: load PVD from runtime * Fix validator side tests * Update statement-distribution to fetch PVD * Fix statement-distribution tests * Backing tests with prospective paras #1 * fix per_relay_parent pruning in backing * Test multiple leaves * Test seconding sanity check * Import statement order Before creating an entry in `PerCandidateState` map wait for the approval from the prospective parachains * Add a test for correct state updates * Second multiple candidates per relay parent test * Add backing tests with prospective paras * Second more than one test without prospective paras * Add a test for prospective para blocks * Update malus * typos Co-authored-by: Chris Sosnin <chris125_@live.com>
* Provisioner changes for async backing * Select candidates based on prospective paras mode * Revert naming * Update tests * Update TODO comment * review
* Provisioner changes for async backing * Select candidates based on prospective paras mode * Revert naming * Update tests * Update TODO comment * review
… rh-async-backing-feature
…o handle versioned packets (#5991) * BEGIN STATEMENT DISTRIBUTION WORK create a vstaging network protocol which is the same as v1 * mostly make network bridge amenable to vstaging * network-bridge: fully adapt to vstaging * add some TODOs for tests * fix fallout in bitfield-distribution * bitfield distribution tests + TODOs * fix fallout in gossip-support * collator-protocol: fix message fallout * collator-protocol: load PVD from runtime * add TODO for vstaging tests * make things compile * set used network protocol version using a feature * fmt * get approval-distribution building * fix approval-distribution tests * spellcheck * nits * approval distribution net protocol test * bitfield distribution net protocol test * Revert "collator-protocol: fix message fallout" This reverts commit 07cc887. * Network bridge tests Co-authored-by: Chris Sosnin <chris125_@live.com>
* remove max_pov_size requirement from prospective pvd request * fmt
* add compatibility type to v2 statement distribution message * warning cleanup * handle compatibility layer for v2 * clean up an unimplemented!() block * circulate statements based on version * extract legacy v1 code into separate module * remove unimplemented * clean up naming of from_requester/responder * remove TODOs * have backing share seconded statements with PVD * fmt * fix warning * Quick fix unused warning for not yet implemented/used staging messages. * Fix network bridge test * Fix wrong merge. We now have 23 subsystems (network bridge split + prospective parachains) Co-authored-by: Robert Klotzner <robert.klotzner@gmx.at>
* Fix backing tests * Fix warnings.
* Draft collator side changes * Start working on collations management * Handle peer's view change * Versioning on advertising * Versioned collation fetching request * Handle versioned messages * Improve docs for collation requests * Add spans * Add request receiver to overseer * Fix collator side tests * Extract relay parent mode to lib * Validator side draft * Add more checks for advertisement * Request pvd based on async backing mode * review * Validator side improvements * Make old tests green * More fixes * Collator side tests draft * Send collation test * fmt * Collator side network protocol versioning * cleanup * merge artifacts * Validator side net protocol versioning * Remove fragment tree membership request * Resolve todo * Collator side core state test * Improve net protocol compatibility * Validator side tests * more improvements * style fixes * downgrade log * Track implicit assignments * Limit the number of seconded candidates per para * Add a sanity check * Handle fetched candidate * fix tests * Retry fetch * Guard against dequeueing while already fetching * Reintegrate connection management * Timeout on advertisements * fmt * spellcheck * update tests after merge
* start on handling incoming * split off session info into separate map * start in on a knowledge tracker * address some grumbles * format * missed comment * some docs for direct * add note on slashing * amend * simplify 'direct' code * finish up the 'direct' logic * add a bunch of tests for the direct-in-group logic * rename 'direct' to 'cluster', begin a candidate_entry module * distill candidate_entry * start in on a statement-store module * some utilities for the statement store * rewrite 'send_statement_direct' using new tools * filter sending logic on peers which have the relay-parent in their view. * some more logic for handling incoming statements * req/res: BackedCandidatePacket -> AttestedCandidate + tweaks * add a `validated_in_group` bitfield to BackedCandidateInventory * BackedCandidateInventory -> Manifest * start in on requester module * add outgoing request for attested candidate * add a priority mechanism for requester * some request dispatch logic * add seconded mask to tagged-request * amend manifest to hold group index * handle errors and set up scaffold for response validation * validate attested candidate responses * requester -> requests * add some utilities for manipulating requests * begin integrating requester * start grid module * tiny * refactor grid topology to expose more info to subsystems * fix grid_topology test * fix overseer test * implement topology group-based view construction logic * fmt * flesh out grid slightly more * add indexed groups utility * integrate Groups into per-session info * refactor statement store to borrow Groups * implement manifest knowledge utility * add a test for topology setup * don't send to group members * test for conflicting manifests * manifest knowledge tests * fmt * rename field * garbage collection for grid tracker * routines for finding correct/incorrect advertisers * add manifest import logic * tweak naming * more tests for manifest import * add comment * rework candidates into a view-wide tracker * fmt * start writing boilerplate for grid sending * fmt * some more group boilerplate * refactor handling of topology and authority IDs * fmt * send statements directly to grid peers where possible * send to cluster only if statement belongs to cluster * improve handling of cluster statements * handle incoming statements along the grid * API for introduction of candidates into the tree * backing: use new prospective parachains API * fmt prospective parachains changes * fmt statement-dist * fix condition * get ready for tracking importable candidates * prospective parachains: add Cow logic * incomplete and complete hypothetical candidates * remove keep_if_unneeded * fmt * implement more general HypotheticalFrontier * fmt, cleanup * add a by_parent_hash index to candidate tracker * more framework for future code * utilities for getting all hypothetical candidates for frontier * track origin in statement store * fmt * requests should return peer * apply post-confirmation reckoning * flesh out import/announce/circulate logic on new statements * adjust * adjust TODO comment * fix backing tests * update statement-distribution to use new indexedvec * fmt * query hypothetical candidates * implement `note_importable_under` * extract common utility of fragment tree updates * add a helper function for getting statements unknown by backing * import fresh statements to backing * send announcements and acknowledgements over grid * provide freshly importable statements also avoid tracking backed candidates in statement distribution * do not issue requests on newly importable candidates * add TODO for later when confirming candidate * write a routine for handling backed candidate notifications * simplify grid substantially * add some test TODOs * handle confirmed candidates & grid announcements * finish implementing manifest handling, including follow up statements * send follow-up statements when acknowledging freshly backed * fmt * handle incoming acknowledgements * a little DRYing * wire up network messages to handlers * fmt * some skeleton code for peer view update handling * more peer view skeleton stuff * Fix async backing statement distribution tests (#6621) * Fix compile errors in tests * Cargo fmt * Resolve some todos in async backing statement-distribution branch (#6482) * Implement `remove_by_relay_parent` * Extract `minimum_votes` to shared primitives. * Add `can_send_statements_received_with_prejudice` test * Fix test * Update docstrings * Cargo fmt * Fix compile error * Fix compile errors in tests * Cargo fmt * Add module docs; write `test_priority_ordering` (first draft) * Fix `test_priority_ordering` * Move `insert_or_update_priority`: `Drop` -> `set_cluster_priority` * Address review comments * Remove `Entry::get_mut` * fix test compilation * add a TODO for a test * clean up a couple of TODOs * implement sending pending cluster statements * refactor utility function for sending acknowledgement and statements * mostly implement catching peers up via grid * Fix clippy error * alter grid to track all pending statements * fix more TODOs and format * tweak a TODO in requests * some logic for dispatching requests * fmt * skeleton for response receiving * Async backing statement distribution: cluster tests (#6678) * Add `pending_statements_set_when_receiving_fresh_statements` * Add `pending_statements_updated_when_sending_statements` test * fix up * fmt * update TODO * rework seconded mask in requests * change doc * change unhandledresponse not to borrow request manager * only accept responses sufficient to back * finish implementing response handling * extract statement filter to protocol crate * rework requests: use statement filter in network protocol * dispatch cluster requests correctly * rework cluster statement sending * implement request answering * fmt * only send confirmed candidate statement messages on unified relay-parent * Fix Tests In Statement Distribution Branch * Async Backing: Integrate `vstaging` of statement distribution into `lib.rs` (#6715) * Integrate `handle_active_leaves_update` * Integrate `share_local_statement`/`handle_backed_candidate_message` * Start hooking up request/response flow * Finish hooking up request/response flow * Limit number of parallel requests in responder * Fix test compilation errors * Fix missing check for prospective parachains mode * Fix some more compile errors * clean up some review comments * clean up warnings * Async backing statement distribution: grid tests (#6673) * Add `manifest_import_returns_ok_true` test * cargo fmt * Add pending_communication_receiving_manifest_on_confirmed_candidate * Add `senders_can_provide_manifests_in_acknowledgement` test * Add a couple of tests for pending statements * Add `pending_statements_cleared_when_sending` test * Add `pending_statements_respect_remote_knowledge` test * Refactor group creation in tests * Clarify docs * Address some review comments * Make some clarifications * Fix post-merge errors * Clarify test `senders_can_provide_manifests_in_acknowledgement` * Try writing `pending_statements_are_updated_after_manifest_exchange` * Document "seconding limit" and `reject_overflowing_manifests` test * Test that seconding counts are not updated for validators on error * Fix tests * Fix manifest exchange test * Add more tests in `requests.rs` (#6707) This resolves remaining TODOs in this file. * remove outdated inventory terminology * Async backing statement distribution: `Candidates` tests (#6658) * Async Backing: Fix clippy errors in statement distribution branch (#6720) * Integrate `handle_active_leaves_update` * Integrate `share_local_statement`/`handle_backed_candidate_message` * Start hooking up request/response flow * Finish hooking up request/response flow * Limit number of parallel requests in responder * Fix test compilation errors * Fix missing check for prospective parachains mode * Fix some more compile errors * Async Backing: Fix clippy errors in statement distribution branch * Fix some more clippy lints * add tests module * fix warnings in existing tests * create basic test harness * create a test state struct * fmt * create empty cluster & grid modules for tests * some TODOs for cluster test suite * describe test-suite for grid logic * describe request test suite * fix seconding-limit bug * Remove extraneous `pub` This somehow made it into my clippy PR. * Fix some test compile warnings * Remove some unneeded `allow`s * adapt some new test helpers from Marcin * add helper for activating a gossip topology * add utility for signing statements * helpers for connecting/disconnecting peers * round out network utilities * fmt * fix bug in initializing validator-meta * fix compilation * implement first cluster test * TODOs for incoming request tests * Remove unneeded `make_committed_candidate` helper * fmt * Hook up request sender * Add `valid_statement_without_prior_seconded_is_ignored` test * Fix `valid_statement_without_prior_seconded_is_ignored` test * some more tests for cluster * add a TODO about grid senders * integrate inbound req/res into test harness * polish off initial cluster test suite * keep introduce candidate request * fix tests after introduce candidate request * fmt * Add grid protocol to module docs * Remove obsolete test * Fix comments * Test `backed_in_path_only: true` * Update node/network/protocol/src/lib.rs Co-authored-by: Chris Sosnin <48099298+slumber@users.noreply.github.com> * Update node/network/protocol/src/request_response/mod.rs Co-authored-by: Chris Sosnin <48099298+slumber@users.noreply.github.com> * Mark receiver with `vstaging` * First draft of `ensure_seconding_limit_is_respected` test * validate grid senders based on manifest kind * fix mask_seconded/valid * fix unwanted-mask check * fix build * resolve todo on leaf mode * Unify protocol naming to vstaging * Fix `ensure_seconding_limit_is_respected` test * Start `backed_candidate_leads_to_advertisement` test * fmt, fix grid test after topology change * Send Backed notification * Finish `backed_candidate_leads_to_advertisement` test * Finish `peer_reported_for_duplicate_statements` test * Finish `received_advertisement_before_confirmation_leads_to_request` * Add `advertisements_rejected_from_incorrect_peers` test * Add `manifest_rejected_*` tests * Add `manifest_rejected_when_group_does_not_match_para` test * Add `local_node_sanity_checks_incoming_requests` test * Add `local_node_respects_statement_mask` test * Add tests where peer is reported for providing invalid signatures * Add `cluster_peer_allowed_to_send_incomplete_statements` test * Add `received_advertisement_after_backing_leads_to_acknowledgement` * Add `received_advertisement_after_confirmation_before_backing` test * peer_reported_for_advertisement_conflicting_with_confirmed_candidate * Add `peer_reported_for_not_enough_statements` test * Add `peer_reported_for_providing_statements_meant_to_be_masked_out` * Add `additional_statements_are_shared_after_manifest_exchange` * Add `grid_statements_imported_to_backing` test * Add `relay_parent_entering_peer_view_leads_to_advertisement` test * Add `advertisement_not_re_sent_when_peer_re_enters_view` test * Update node/network/statement-distribution/src/vstaging/tests/grid.rs Co-authored-by: asynchronous rob <rphmeier@gmail.com> * Resolve TODOs, update test * Address unused code * Add check after every test for unhandled requests * Refactor (`make_dummy_leaf` and `handle_sent_request`) * Refactor (`make_dummy_topology`) * Minor refactor --------- Co-authored-by: Robert Habermeier <rphmeier@gmail.com> Co-authored-by: Chris Sosnin <48099298+slumber@users.noreply.github.com> Co-authored-by: Chris Sosnin <chris125_@live.com>
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An interesting read! Found a couple nits that would make things more clear to me.
roadmap/implementers-guide/src/node/collators/collation-generation.md
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…tion.md Co-authored-by: Bradley Olson <34992650+BradleyOlson64@users.noreply.github.com>
…tion.md Co-authored-by: Bradley Olson <34992650+BradleyOlson64@users.noreply.github.com>
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mrcnski
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Async backing: impl guide: Collator Generation
impl guide: Collator Generation
May 18, 2023
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May 18, 2023
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Some notes I started taking on this subsystem.