SystemOrigin trait

frame/support/src/origin.rs

@@ -215,6 +215,7 @@ macro_rules! impl_outer_origin {
 		impl $crate::traits::OriginTrait for $name {
 			type Call = <$runtime as $system::Trait>::Call;
 			type PalletsOrigin = $caller_name;
+			type AccountId = <$runtime as $system::Trait>::AccountId;
 
 			fn add_filter(&mut self, filter: impl Fn(&Self::Call) -> bool + 'static) {
 				let f = self.filter.clone();
@@ -279,6 +280,20 @@ macro_rules! impl_outer_origin {
 			}
 		}
 
+		impl $crate::traits::SystemOrigin for $name {
+			type AccountId = <$runtime as $system::Trait>::AccountId;
+
+			fn none() -> Self {
+				$system::RawOrigin::None.into()
+			}
+			fn root() -> Self {
+				$system::RawOrigin::Root.into()
+			}
+			fn signed(by: <$runtime as $system::Trait>::AccountId) -> Self {
+				$system::RawOrigin::Signed(by).into()
+			}
+		}
+
 		impl From<$system::Origin<$runtime>> for $caller_name {
 			fn from(x: $system::Origin<$runtime>) -> Self {
 				$caller_name::system(x)

frame/support/src/traits.rs

@@ -1613,6 +1613,19 @@ pub trait UnfilteredDispatchable {
 	fn dispatch_bypass_filter(self, origin: Self::Origin) -> crate::dispatch::DispatchResultWithPostInfo;
 }
 
+/// Basic origin construction and AccountId type.
+pub trait SystemOrigin {
+	/// The type of account identifiers used by the system.
+	type AccountId;
+
+	/// Create with system none origin and `frame-system::Trait::BaseCallFilter`.
+	fn none() -> Self;
+	/// Create with system root origin and no filter.
+	fn root() -> Self;
+	/// Create with system signed origin and `frame-system::Trait::BaseCallFilter`.
+	fn signed(by: Self::AccountId) -> Self;
+}
+
 /// Methods available on `frame_system::Trait::Origin`.
 pub trait OriginTrait: Sized {
 	/// Runtime call type, as in `frame_system::Trait::Call`
@@ -1621,6 +1634,9 @@ pub trait OriginTrait: Sized {
 	/// The caller origin, overarching type of all pallets origins.
 	type PalletsOrigin;
 
+	/// The AccountId used across the system.
+	type AccountId;
+
 	/// Add a filter to the origin.
 	fn add_filter(&mut self, filter: impl Fn(&Self::Call) -> bool + 'static);