Struct StoragesHistory 

pub struct StoragesHistory { /* private fields */ }

Stores pointers to block number changeset with changes for each storage key.

Last shard key of the storage will contain u64::MAX BlockNumber, this would allows us small optimization on db access when change is in plain state.

Imagine having shards as:

• Address | StorageKey | 100
• Address | StorageKey | u64::MAX

What we need to find is number that is one greater than N. Db seek function allows us to fetch the shard that equal or more than asked. For example:

• For N=50 we would get first shard.
• for N=150 we would get second shard.
• If max block number is 200 and we ask for N=250 we would fetch last shard and know that needed entry is in StoragePlainState.
• If there were no shard we would get None entry or entry of different storage key.

Marker type representing a database table mapping StorageShardedKey to BlockNumberList.

Trait Implementations

impl Debug for StoragesHistory

fn fmt(&self, _: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Table for StoragesHistory

where IntegerList: Value + 'static,

const NAME: &'static str = table_names::StoragesHistory

The table’s name.

const DUPSORT: bool = false

Whether the table is also a DUPSORT table.

const TABLE: Option<Tables>

The Tables entry this table is stored in, or None for tables defined outside of Tables.

type Key = StorageShardedKey

Key element of Table.

type Value = IntegerList

Value element of Table.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 0 bytes