Typeberry by Fluffy Labs - v0.8.4
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    Interface StatesDb<T>

    Interface for accessing states stored in the database.

    NOTE that the design of this interface is heavily influenced by the LMDB implementation, so that we can implement it efficiently.

    See the documentation there for more detailed reasoning.

    interface StatesDb<T extends State = State> {
        close(): Promise<void>;
        diskSizeInBytes?(): number | null;
        getState(header: OpaqueHash & WithOpaque<"HeaderHash">): T | null;
        getStateRoot(state: T): Promise<OpaqueHash & WithOpaque<"StateRootHash">>;
        markUnused(header: OpaqueHash & WithOpaque<"HeaderHash">): void;
        updateAndSetState(
            header: OpaqueHash & WithOpaque<"HeaderHash">,
            state: T,
            update: Partial<State & ServicesUpdate>,
        ): Promise<Result<typeof OK, StateUpdateError>>;
    }

    Type Parameters

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    close diskSizeInBytes? getState getStateRoot markUnused updateAndSetState

    Methods

    • Apparent on-disk size of the database in bytes, used for monitoring.

      Returns null when the size is unknown. Backends that are not persisted (e.g. in-memory) may omit the method entirely.

      Returns number | null

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