State Keeper State

Access to the VM storage for the state keeper. The state keeper itself is a part of the zksync_core crate; it is a component responsible for handling transaction execution and creating L2 blocks and L1 batches.

All state keeper data is currently stored in Postgres. (Beside it, we provide an in-memory implementation for benchmarking / testing purposes.) We also keep a secondary copy for part of it in RocksDB for performance reasons. Currently, we only duplicate the data needed by the multivm crate.