feat: initialize Kurdistan SDK - independent fork of Polkadot SDK

substrate/frame/system/src/extensions/check_non_zero_sender.rs

@@ -0,0 +1,126 @@
+// This file is part of Substrate.
+
+// Copyright (C) Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: Apache-2.0
+
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::Config;
+use codec::{Decode, DecodeWithMemTracking, Encode};
+use core::marker::PhantomData;
+use frame_support::{pallet_prelude::TransactionSource, traits::OriginTrait, DefaultNoBound};
+use scale_info::TypeInfo;
+use sp_runtime::{
+	impl_tx_ext_default,
+	traits::{DispatchInfoOf, TransactionExtension},
+	transaction_validity::InvalidTransaction,
+};
+
+/// Check to ensure that the sender is not the zero address.
+#[derive(Encode, Decode, DecodeWithMemTracking, DefaultNoBound, Clone, Eq, PartialEq, TypeInfo)]
+#[scale_info(skip_type_params(T))]
+pub struct CheckNonZeroSender<T>(PhantomData<T>);
+
+impl<T: Config + Send + Sync> core::fmt::Debug for CheckNonZeroSender<T> {
+	#[cfg(feature = "std")]
+	fn fmt(&self, f: &mut core::fmt::Formatter) -> core::fmt::Result {
+		write!(f, "CheckNonZeroSender")
+	}
+
+	#[cfg(not(feature = "std"))]
+	fn fmt(&self, _: &mut core::fmt::Formatter) -> core::fmt::Result {
+		Ok(())
+	}
+}
+
+impl<T: Config + Send + Sync> CheckNonZeroSender<T> {
+	/// Create new `TransactionExtension` to check runtime version.
+	pub fn new() -> Self {
+		Self(core::marker::PhantomData)
+	}
+}
+
+impl<T: Config + Send + Sync> TransactionExtension<T::RuntimeCall> for CheckNonZeroSender<T> {
+	const IDENTIFIER: &'static str = "CheckNonZeroSender";
+	type Implicit = ();
+	type Val = ();
+	type Pre = ();
+
+	fn weight(&self, _: &T::RuntimeCall) -> sp_weights::Weight {
+		<T::ExtensionsWeightInfo as super::WeightInfo>::check_non_zero_sender()
+	}
+
+	fn validate(
+		&self,
+		origin: <T as Config>::RuntimeOrigin,
+		_call: &T::RuntimeCall,
+		_info: &DispatchInfoOf<T::RuntimeCall>,
+		_len: usize,
+		_self_implicit: Self::Implicit,
+		_inherited_implication: &impl Encode,
+		_source: TransactionSource,
+	) -> sp_runtime::traits::ValidateResult<Self::Val, T::RuntimeCall> {
+		if let Some(who) = origin.as_signer() {
+			if who.using_encoded(|d| d.iter().all(|x| *x == 0)) {
+				return Err(InvalidTransaction::BadSigner.into());
+			}
+		}
+		Ok((Default::default(), (), origin))
+	}
+	impl_tx_ext_default!(T::RuntimeCall; prepare);
+}
+
+#[cfg(test)]
+mod tests {
+	use super::*;
+	use crate::mock::{new_test_ext, Test, CALL};
+	use frame_support::{assert_ok, dispatch::DispatchInfo};
+	use sp_runtime::{
+		traits::{AsTransactionAuthorizedOrigin, DispatchTransaction, TxBaseImplication},
+		transaction_validity::{TransactionSource::External, TransactionValidityError},
+	};
+
+	#[test]
+	fn zero_account_ban_works() {
+		new_test_ext().execute_with(|| {
+			let info = DispatchInfo::default();
+			let len = 0_usize;
+			assert_eq!(
+				CheckNonZeroSender::<Test>::new()
+					.validate_only(Some(0).into(), CALL, &info, len, External, 0)
+					.unwrap_err(),
+				TransactionValidityError::from(InvalidTransaction::BadSigner)
+			);
+			assert_ok!(CheckNonZeroSender::<Test>::new().validate_only(
+				Some(1).into(),
+				CALL,
+				&info,
+				len,
+				External,
+				0,
+			));
+		})
+	}
+
+	#[test]
+	fn unsigned_origin_works() {
+		new_test_ext().execute_with(|| {
+			let info = DispatchInfo::default();
+			let len = 0_usize;
+			let (_, _, origin) = CheckNonZeroSender::<Test>::new()
+				.validate(None.into(), CALL, &info, len, (), &TxBaseImplication(CALL), External)
+				.unwrap();
+			assert!(!origin.is_transaction_authorized());
+		})
+	}
+}