Crate sp_externalities

Substrate externalities abstraction

The externalities mainly provide access to storage and to registered extensions. Extensions are for example the keystore or the offchain externalities. These externalities are used to access the node from the runtime via the runtime interfaces.

This crate exposes the main Externalities trait.

Macros

• decl_extension
  Macro for declaring an extension that usable with Extensions.

Structs

• Extensions
  Stores extensions that should be made available through the externalities.
• MultiRemovalResults
  Results concerning an operation to remove many keys.

Enums

• Error
  Externalities error.

Traits

• Extension
  Marker trait for types that should be registered as Externalities extension.
• ExtensionStore
  Something that provides access to the Extensions store.
• Externalities
  The Substrate externalities.
• ExternalitiesExt
  Extension for the Externalities trait.

Functions

• set_and_run_with_externalities
  Set the given externalities while executing the given closure. To get access to the externalities while executing the given closure with_externalities grants access to them. The externalities are only set for the same thread this function was called from.
• with_externalities
  Execute the given closure with the currently set externalities.