* reimplement rpc pubsub with a broadcast queue
* update tests for new pubsub implementation
* fix: fix review suggestions
* chore(rpc): add additional pubsub metrics
* integrate max subscriptions check into SubscriptionTracker to reduce locking
* separate subscription control from tracker
* limit memory usage of items in pubsub broadcast queue, improve error handling
* add more pubsub metrics
* add final count metrics to pubsub
* add metric for total number of subscriptions
* fix small review suggestions
* remove by_params from SubscriptionTracker and add node_progress_watchers map instead
* add subscription tracker tests
* add metrics for number of pubsub notifications as a counter
* ignore clippy lint in TokenCounter
* fix underflow in token counter
* reduce queue capacity in pubsub tests
* fix(rpc): fix test timeouts
* fix race in account subscription test
* Add RpcSubscriptions::new_for_tests
Co-authored-by: Pavel Strakhov <p.strakhov@iconic.vc>
Co-authored-by: Nikita Podoliako <n.podoliako@zubr.io>
Co-authored-by: Tyera Eulberg <tyera@solana.com>
* Add TestValidator::new_with_fees constructor, and warning for low bootstrap_validator_lamports
* Add logging to solana-tokens integration test to help catch low bootstrap_validator_lamports in the future
* Reasonable TestValidator mint_lamports
* Add service to track the most recent optimistically confirmed bank
* Plumb service into ClusterInfoVoteListener and ReplayStage
* Clean up test
* Use OptimisticallyConfirmedBank in RPC
* Remove superfluous notifications from RpcSubscriptions
* Use crossbeam to avoid mpsc recv_timeout panic
* Review comments
* Remove superfluous last_checked_slots, but pass in OptimisticallyConfirmedBank for complete correctness
* Use untagged RpcSignatureResult enum to avoid breaking downstream consumers of current signature subscriptions
* Clean up client duplication
* Clippy
* Remove Blockstore member variable from BlockCommitmentCache
* Hoist is_confirmed_rooted() to its only caller
BlockCommitmentCache no longer depends on Blockstore
* Move BlockCommitmentCache to solana_runtime
* Switch subscriptions to use commitment instead of confirmations
* Add bank method to return account and last-modified slot
* Add last_modified_slot to subscription data and use to filter account subscriptions
* Update tests to non-zero last_notified_slot
* Add accounts subscriptions to test; fails at higher tx load
* Pass BankForks to RpcSubscriptions
* Use BankForks on add_account_subscription to properly initialize last_notified_slot
* Bundle subscriptions
* Check for non-equality
* Use commitment to initialize last_notified_slot; revert context.slot chage
* Add largest_confirmed_root to BlockCommitmentCache
* clippy
* Add blockstore to BlockCommitmentCache to check root
* Add rooted_stake helper fn and test
* Nodes that are behind should correctly id confirmed roots
* Simplify rooted_stake collector
* Add runtime methods to simply get status and slot
* Add helper function to get slot confirmation_count from BlockCommitmentCache
* Return cluster confirmations in getSignatureStatus
* Remove use of invalid get_signature_confirmation_status
* Remove unused methods
* Update pubsub to use cluster confirmations
* Fix test_check_signature_subscribe failure
* Refactor confirmations to read commitment cache only once
* Review comments
* Use bank, root from BlockCommitmentCache
* Update docs
* Add metric for block-commitment aggregations
Co-authored-by: Justin Starry <justin@solana.com>