sudo pallet ported as local pallet

Signed-off-by: Uncle Stinky <uncle.stinky@ghostchain.io>

pallets/sudo/src/extension.rs

@@ -0,0 +1,82 @@
+use crate::{Config, Key};
+use codec::{Decode, Encode};
+use frame_support::{dispatch::DispatchInfo, ensure};
+use scale_info::TypeInfo;
+use sp_runtime::{
+	traits::{DispatchInfoOf, Dispatchable, SignedExtension},
+	transaction_validity::{
+		InvalidTransaction, TransactionPriority, TransactionValidity, TransactionValidityError,
+		UnknownTransaction, ValidTransaction,
+	},
+};
+use sp_std::{fmt, marker::PhantomData};
+
+#[derive(Clone, Eq, PartialEq, Encode, Decode, TypeInfo)]
+#[scale_info(skip_type_params(T))]
+pub struct CheckOnlySudoAccount<T: Config + Send + Sync>(PhantomData<T>);
+
+impl<T: Config + Send + Sync> Default for CheckOnlySudoAccount<T> {
+	fn default() -> Self {
+		Self(Default::default())
+	}
+}
+
+impl<T: Config + Send + Sync> fmt::Debug for CheckOnlySudoAccount<T> {
+	#[cfg(feature = "std")]
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "CheckOnlySudoAccount")
+	}
+
+	#[cfg(not(feature = "std"))]
+	fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
+		Ok(())
+	}
+}
+
+impl<T: Config + Send + Sync> CheckOnlySudoAccount<T> {
+	/// Creates new `SignedExtension` to check sudo key.
+	pub fn new() -> Self {
+		Self::default()
+	}
+}
+
+impl<T: Config + Send + Sync> SignedExtension for CheckOnlySudoAccount<T>
+where
+	<T as Config>::RuntimeCall: Dispatchable<Info = DispatchInfo>,
+{
+	const IDENTIFIER: &'static str = "CheckOnlySudoAccount";
+	type AccountId = T::AccountId;
+	type Call = <T as Config>::RuntimeCall;
+	type AdditionalSigned = ();
+	type Pre = ();
+
+	fn additional_signed(&self) -> Result<Self::AdditionalSigned, TransactionValidityError> {
+		Ok(())
+	}
+
+	fn validate(
+		&self,
+		who: &Self::AccountId,
+		_call: &Self::Call,
+		info: &DispatchInfoOf<Self::Call>,
+		_len: usize,
+	) -> TransactionValidity {
+		let sudo_key: T::AccountId = Key::<T>::get().ok_or(UnknownTransaction::CannotLookup)?;
+		ensure!(*who == sudo_key, InvalidTransaction::BadSigner);
+
+		Ok(ValidTransaction {
+			priority: info.weight.ref_time() as TransactionPriority,
+			..Default::default()
+		})
+	}
+
+	fn pre_dispatch(
+		self,
+		who: &Self::AccountId,
+		call: &Self::Call,
+		info: &DispatchInfoOf<Self::Call>,
+		len: usize,
+	) -> Result<Self::Pre, TransactionValidityError> {
+		self.validate(who, call, info, len).map(|_| ())
+	}
+}