#### Current implementation of ReplicaAccountInfo restricts
possibilities for inflight account filtration
Current implementation includes transaction signature in
ReplicaAccountInfo. This approach does not allow to filter accounts by
matching other accounts in transaction in-flight (e. g. accept only
those accounts included in transactions for specific programs). Current
implementation forces to collect ALL accounts and transactions for some
period of time and perform such complex filtration afterwards.
#### Pass reference to transaction object instead of transaction
signature into ReplicaAccountInfo
Advanced in-flight filtration can be implemented in plugins by passing
reference to transaction for every update_account event. This change
doesn't bring any overhead comparing to current implementation (only
data type of reference is changed) and brings only minor changes in
source code.
Problem
The plugins need to know when all transactions for a block have been all notified to serve getBlock request correctly. As block and transaction notifications are sent asynchronously to each other it will be difficult.
Summary of Changes
Include the executed transaction count in block notification which can be used to check if all transactions have been notified.
* Define shuffle to prep using same shuffle for multiple slices
* Determine transaction indexes and plumb to execute_batch
* Pair transaction_index with transaction in TransactionStatusService
* Add new ReplicaTransactionInfoVersion
* Plumb transaction_indexes through BankingStage
* Prepare BankingStage to receive transaction indexes from PohRecorder
* Determine transaction indexes in PohRecorder; add field to WorkingBank
* Add PohRecorder::record unit test
* Only pass starting_transaction_index around PohRecorder
* Add helper structs to simplify test DashMap
* Pass entry and starting-index into process_entries_with_callback together
* Add tx-index checks to test_rebatch_transactions
* Revert shuffle definition and use zip/unzip
* Only zip/unzip if randomize
* Add confirm_slot_entries test
* Review nits
* Add type alias to make sender docs more clear
There's no direct linkage between account-update events and transaction-events
Issue is linked with geyser plugin interface
Currently, there's no straightforward way to determine what notify_transaction call is related to particular update_account call. So, there's no simple way to determine what transaction caused what changes in accounts. This issue is especially valuable in case when several transactions modifies single account in the same slot.
Add txn_signature field to ReplicaTransactionInfo structure
This additional field will contain the signature of transaction which caused this account update event. This modification is not bringing significant overhead because all necessary information for such linkage already available inside Accounts::collect_accounts_to_store method
Yihau Chen
Lijun Wang
Kirill Fomichev
Tyera
Nick Garfield
ivandzen
ivandzen
Chao Xu