Bastian Köcher
4ef1d0df02
* sp-api: Support expanding the macro code This pr introduces the `expander` crate to expand the generated source code into a file. This gives better error reporting when trying to fix issues in the macro itself as Rustc will point to the line in this file. The feature can be enabled by setting `SP_API_EXPAND=1` at compile time. Besides that the generated code is changed to fix warnings in the exanped version. * Fixes
Substrate runtime api
The Substrate runtime api is the crucial interface between the node and the runtime.
Every call that goes into the runtime is done with a runtime api. The runtime apis are not fixed.
Every Substrate user can define its own apis with
decl_runtime_apis and implement them in
the runtime with impl_runtime_apis.
Every Substrate runtime needs to implement the [Core] runtime api. This api provides the basic
functionality that every runtime needs to export.
Besides the macros and the [Core] runtime api, this crates provides the [Metadata] runtime
api, the [ApiExt] trait, the [CallApiAt] trait and the [ConstructRuntimeApi] trait.
On a meta level this implies, the client calls the generated API from the client perspective.
License: Apache-2.0