[][src]Macro sc_executor::native_executor_instance

macro_rules! native_executor_instance {
    ( $pub:vis $name:ident, $dispatcher:path, $version:path $(,)?) => { ... };
    ( $pub:vis $name:ident, $dispatcher:path, $version:path, $custom_host_functions:ty $(,)?) => { ... };
    (IMPL $name:ident, $dispatcher:path, $version:path, $custom_host_functions:ty) => { ... };
}

Implements a NativeExecutionDispatch for provided parameters.

Example

sc_executor::native_executor_instance!(
    pub MyExecutor,
    substrate_test_runtime::api::dispatch,
    substrate_test_runtime::native_version,
);

With custom host functions

When you want to use custom runtime interfaces from within your runtime, you need to make the executor aware of the host functions for these interfaces.

#[runtime_interface]
trait MyInterface {
    fn say_hello_world(data: &str) {
        println!("Hello world from: {}", data);
    }
}

sc_executor::native_executor_instance!(
    pub MyExecutor,
    substrate_test_runtime::api::dispatch,
    substrate_test_runtime::native_version,
    my_interface::HostFunctions,
);

When you have multiple interfaces, you can give the host functions as a tuple e.g.: (my_interface::HostFunctions, my_interface2::HostFunctions)