Trait polkadot_service::ExecuteWithClient

pub trait ExecuteWithClient {
    type Output;

    fn execute_with_client<Client, Api, Backend>(
        self,
        client: Arc<Client>
    ) -> Self::Output
    where
        <Api as ApiExt<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>::StateBackend: Backend<BlakeTwo256>,
        Backend: 'static + Backend<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>,
        <Backend as Backend<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>::State: Backend<BlakeTwo256>,
        Api: RuntimeApiCollection<StateBackend = <Backend as Backend<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>::State>,
        Client: 'static + AbstractClient<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>, Backend, Api = Api>;
}

Execute something with the client instance.

As there exist multiple chains inside Polkadot, like Polkadot itself, Kusama, Westend etc, there can exist different kinds of client types. As these client types differ in the generics that are being used, we can not easily return them from a function. For returning them from a function there exists Client. However, the problem on how to use this client instance still exists. This trait “solves” it in a dirty way. It requires a type to implement this trait and than the execute_with_client function can be called with any possible client instance.

In a perfect world, we could make a closure work in this way.

Required Associated Types

type Output

The return type when calling this instance.

Required Methods

fn execute_with_client<Client, Api, Backend>(
    self,
    client: Arc<Client>
) -> Self::Outputwhere
    <Api as ApiExt<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>::StateBackend: Backend<BlakeTwo256>,
    Backend: 'static + Backend<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>,
    <Backend as Backend<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>::State: Backend<BlakeTwo256>,
    Api: RuntimeApiCollection<StateBackend = <Backend as Backend<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>>>::State>,
    Client: 'static + AbstractClient<Block<Header<u32, BlakeTwo256>, OpaqueExtrinsic>, Backend, Api = Api>,

Execute whatever should be executed with the given client instance.

Implementors