• Several backend db migrations that fix the state of the chain: bumping StorageVersion for pallets Balances, Scheduler, Staking
• Migrating all contracts from V8 to V9 version
• Update to Substrate v0.9.38, which is ink4 compatible
• Setting storage per one byte of contract storage: 4*10^{-5} AZERO per byte
• Increase total memory to 256MB, decrease call stack to 16 and enforce heap pages limit at cli.
  minor improvements to the finalization network