Trait frame::runtime::apis::CallApiAt

pub trait CallApiAt<Block>where
    Block: Block,{
    type StateBackend: Backend<<<Block as Block>::Header as Header>::Hashing> + AsTrieBackend<<<Block as Block>::Header as Header>::Hashing, LocalTrieCache<<<Block as Block>::Header as Header>::Hashing>>;

    // Required methods
    fn call_api_at(
        &self,
        params: CallApiAtParams<'_, Block>
    ) -> Result<Vec<u8, Global>, ApiError>;
    fn runtime_version_at(
        &self,
        at_hash: <Block as Block>::Hash
    ) -> Result<RuntimeVersion, ApiError>;
    fn state_at(
        &self,
        at: <Block as Block>::Hash
    ) -> Result<Self::StateBackend, ApiError>;
    fn initialize_extensions(
        &self,
        at: <Block as Block>::Hash,
        extensions: &mut Extensions
    ) -> Result<(), ApiError>;
}

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

Required Associated Types

type StateBackend: Backend<<<Block as Block>::Header as Header>::Hashing> + AsTrieBackend<<<Block as Block>::Header as Header>::Hashing, LocalTrieCache<<<Block as Block>::Header as Header>::Hashing>>

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

Required Methods

fn call_api_at( &self, params: CallApiAtParams<'_, Block> ) -> Result<Vec<u8, Global>, 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_hash: <Block as Block>::Hash ) -> Result<RuntimeVersion, ApiError>

Returns the runtime version at the given block.

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

Get the state at the given block.

fn initialize_extensions( &self, at: <Block as Block>::Hash, extensions: &mut Extensions ) -> Result<(), ApiError>

Initialize the extensions for the given block at by using the global extensions factory.

Implementors