* Change confidence parameters
* Add status_cache_ancestors to get all relevant ancestors of a bank including roots from status cache
* Fix and add tests
* Clippy
* require vote account to be exempt
* make stake account rent exempt
* add rent exempted system instruction
* use rent exemption instruction in vote and stake api
* use rent exempted account while creating executable account
* updating chacha golden hash as instruction data has changed
* rent will be initialized for genesis bank too
* rename rent.rs to rent_calculator.rs
* add rent sysvar
* integrate rent_calculator with bank
* rent_calculator integration with genesis
* add test for rent sysvar
Summary of Changes:
This change adds functionality to randomize tx execution for every entry. It does this by implementing OrderedIterator that iterates tx slice as per the order specified. The order is generated randomly for every entry.
* Remove unnecessary entry_height from BankInfo
* Refactor process_blocktree to support process_blocktree_from_root
* Refactor to process blocktree after loading from snapshot
* On restart make sure bank_forks contains all the banks between the root and the tip of each fork, not just the head of each fork
* Account for 1 tick_per_slot in bank 0 so that blockhash of bank0 matches the tick
* Rate limit transaction counters
* @sakridge feedback
* Set default high metrics rate for multinode demo
* Fix tests
* Swap defaults and fix env var tests
* Only set metrics rate if not already set
* change paths to something accounts_db (the singleton) owns, fixes SIGILL
* fail deserialize if paths don't work
serialize paths, too
* test that paths are populated from a bank snapshot
* Implement CreditOnlyLocks
* Update credit-only atomic on account load
* Update credit-only atomic after bank.freeze_lock; store credits if all credit-only lock references are dropped
* Commit credit-only credits on bank freeze
* Update core to CreditAccountLocks
* Impl credit-only in System Transfer
* Rework CreditAccountLocks, test, and fix bugs
* Review comments: Pass CreditAccountLocks by reference; Tighten up insert block
* Only store credits on completed slot
* Check balance in bench_exchange funding to ensure commit_credits has completed
* Add is_debitable info to KeyedAccount meta to pass into programs
* Reinstate CreditOnlyLocks check on lock_account
* Rework CreditAccountLocks to remove strong_count usage
* Add multi-threaded credit-only locks test
* Improve RwLocks usage
* Review comments: panic if bad things happen; tighter code
* Assert lock_accounts race does not happen
* Revert panic if bad things happen; not a bad thing
