GetCallIndex trait (#13558)

* GetCallIndex trait

* final impl

* ".git/.scripts/commands/fmt/fmt.sh"

* Docs

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* One more test

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Doc

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

---------

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: command-bot <>
Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

substrate/frame/support/src/dispatch.rs

@@ -29,7 +29,8 @@ pub use crate::{
 		result,
 	},
 	traits::{
-		CallMetadata, GetCallMetadata, GetCallName, GetStorageVersion, UnfilteredDispatchable,
+		CallMetadata, GetCallIndex, GetCallMetadata, GetCallName, GetStorageVersion,
+		UnfilteredDispatchable,
 	},
 };
 #[cfg(feature = "std")]

substrate/frame/support/src/traits.rs

@@ -74,8 +74,8 @@ pub use randomness::Randomness;
 
 mod metadata;
 pub use metadata::{
-	CallMetadata, CrateVersion, GetCallMetadata, GetCallName, GetStorageVersion, PalletInfo,
-	PalletInfoAccess, PalletInfoData, PalletsInfoAccess, StorageVersion,
+	CallMetadata, CrateVersion, GetCallIndex, GetCallMetadata, GetCallName, GetStorageVersion,
+	PalletInfo, PalletInfoAccess, PalletInfoData, PalletsInfoAccess, StorageVersion,
 	STORAGE_VERSION_STORAGE_KEY_POSTFIX,
 };
 

substrate/frame/support/src/traits/metadata.rs

@@ -101,12 +101,20 @@ pub struct CallMetadata {
 
 /// Gets the function name of the Call.
 pub trait GetCallName {
-	/// Return all function names.
+	/// Return all function names in the same order as [`GetCallIndex`].
 	fn get_call_names() -> &'static [&'static str];
 	/// Return the function name of the Call.
 	fn get_call_name(&self) -> &'static str;
 }
 
+/// Gets the function index of the Call.
+pub trait GetCallIndex {
+	/// Return all call indices in the same order as [`GetCallName`].
+	fn get_call_indices() -> &'static [u8];
+	/// Return the index of this Call.
+	fn get_call_index(&self) -> u8;
+}
+
 /// Gets the metadata for the Call - function name and pallet name.
 pub trait GetCallMetadata {
 	/// Return all module names.