Make CheckNonce refuse transactions signed by accounts with no providers

paritytech · Sep 14, 2023 · 3d637c3 · 3d637c3
1 parent 49c4b20
commit 3d637c3
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/substrate/frame/system/src/extensions/check_nonce.rs b/substrate/frame/system/src/extensions/check_nonce.rs
@@ -20,7 +20,7 @@ use codec::{Decode, Encode};
 use frame_support::dispatch::DispatchInfo;
 use scale_info::TypeInfo;
 use sp_runtime::{
-	traits::{DispatchInfoOf, Dispatchable, One, SignedExtension},
+	traits::{DispatchInfoOf, Dispatchable, One, SignedExtension, Zero},
 	transaction_validity::{
 		InvalidTransaction, TransactionLongevity, TransactionValidity, TransactionValidityError,
 		ValidTransaction,
@@ -80,6 +80,10 @@ where
 		_len: usize,
 	) -> Result<(), TransactionValidityError> {
 		let mut account = crate::Account::<T>::get(who);
+		if account.providers.is_zero() && account.sufficients.is_zero() {
+			// Nonce storage not paid for
+			return Err(InvalidTransaction::Payment.into())
+		}
 		if self.0 != account.nonce {
 			return Err(if self.0 < account.nonce {
 				InvalidTransaction::Stale