Protocol Upgrade Voting Start

Version 53 voting begins at 2022-05-23 15:00:00 UTC - validators will not indicate intent to upgrade to version 53 in blocks they produce until this time

Features

Include promise_batch_action_function_call_weight host function on the runtime #6285 #6536
Switch to LZ4+ZSTD compression from Snappy in RocksDB #6365
Safe DB migrations using RocksDB checkpoints #6282
NEP205: Configurable start of protocol upgrade voting #6309.
Make max_open_files, col_state_cache_size and RocksDB block_size configurable parameters #6584 #6631
Use kebab-case names for neard subcommands to make them consistent with flag names. snake_case names are still valid for existing subcommands but kebab-case will be used for new commands.

Increase deployment cost #6397
Limit the number of locals per contract to 1_000_000
Ensure caching all nodes in the chunk for which touching trie node cost was charged, reduce cost of future reads in a chunk #6628
Lower storage key limit to 2 KiB
Moved Client Actor to separate thread - should improve performance #6333
Changes the gc_fork_clean_step config field default from 1000 to 100, which should reduce garbage collection related slowdowns.
Fixes an issue where blocks containing challenges aren't rejected by the chain, leading to crashes
Avoids an expensive calculation during sync that leads to an unresponsive /status page

use_db_migration_snapshot - Enables checkpoints that let the user recover from interrupted DB migrations.
gc_fork_clean_step - Maximum blocks to go through at each garbage collection step when cleaning forks.
gc_num_epochs_to_keep - Number of epochs for which we keep store data
store.enable_statistics - Re-export storage layer statistics as prometheus metrics. Minor performance impact is expected.
store.max_open_files - Maximum number of store files being opened simultaneously.
store.col_state_cache_size - Cache size for ColState column.
store.block_size - Block size used internally in RocksDB.

CODE_COLOR: CODE_YELLOW_MAINNET
RELEASE_VERSION: 1.26.0
PROTOCOL_UPGRADE: TRUE
DATABASE_UPGRADE: FALSE
SECURITY_UPGRADE: TRUE