Trait DatabaseProviderROFactory 

pub trait DatabaseProviderROFactory {
    type Provider;

    // Required method
    fn database_provider_ro(&self) -> Result<Self::Provider, ProviderError>;
}

Available on crate feature storage-api only.

A trait which can be used to describe any factory-like type which returns a read-only provider.

Required Associated Types

type Provider

Provider type returned by this factory.

This type is intentionally left unconstrained; constraints can be added as-needed when this is used.

Required Methods

fn database_provider_ro(&self) -> Result<Self::Provider, ProviderError>

Creates and returns a Provider.

Implementors

impl<F> DatabaseProviderROFactory for OverlayStateProviderFactory<F>

where F: DatabaseProviderFactory, <F as DatabaseProviderFactory>::Provider: TrieReader + StageCheckpointReader + PruneCheckpointReader + BlockNumReader,

type Provider = OverlayStateProvider<<F as DatabaseProviderFactory>::Provider>

impl<T> DatabaseProviderROFactory for T

where T: DatabaseProviderFactory,

type Provider = <T as DatabaseProviderFactory>::Provider