Trait sp_api::CallApiAt

pub trait CallApiAt<Block: BlockT> {
    type StateBackend: StateBackend<HashFor<Block>> + AsTrieBackend<HashFor<Block>>;

    fn call_api_at<R: Encode + Decode + PartialEq, NC: FnOnce() -> Result<R, ApiError> + UnwindSafe>(
        &self,
        params: CallApiAtParams<'_, Block, NC, Self::StateBackend>
    ) -> Result<NativeOrEncoded<R>, ApiError>;
    fn runtime_version_at(
        &self,
        at: &BlockId<Block>
    ) -> Result<RuntimeVersion, ApiError>;
    fn state_at(
        &self,
        at: &BlockId<Block>
    ) -> Result<Self::StateBackend, ApiError>;
}

Something that can call into the an api at a given block.

Required Associated Types

type StateBackend: StateBackend<HashFor<Block>> + AsTrieBackend<HashFor<Block>>

The state backend that is used to store the block states.

Required Methods

fn call_api_at<R: Encode + Decode + PartialEq, NC: FnOnce() -> Result<R, ApiError> + UnwindSafe>(
    &self,
    params: CallApiAtParams<'_, Block, NC, Self::StateBackend>
) -> Result<NativeOrEncoded<R>, ApiError>

Calls the given api function with the given encoded arguments at the given block and returns the encoded result.

fn runtime_version_at(
    &self,
    at: &BlockId<Block>
) -> Result<RuntimeVersion, ApiError>

Returns the runtime version at the given block.

fn state_at(&self, at: &BlockId<Block>) -> Result<Self::StateBackend, ApiError>

Get the state at the given block.

Implementors