prevent upgrade if we are using a nonce

state-chain/pallets/cf-environment/src/lib.rs

@@ -20,8 +20,8 @@ use cf_primitives::{
 	NetworkEnvironment, SemVer,
 };
 use cf_traits::{
-	CompatibleCfeVersions, GetBitcoinFeeInfo, KeyProvider, NetworkEnvironmentProvider, SafeMode,
-	SolanaNonceWatch,
+	CompatibleCfeVersions, ExecutionCondition, GetBitcoinFeeInfo, KeyProvider,
+	NetworkEnvironmentProvider, SafeMode, SolanaNonceWatch,
 };
 use frame_support::{pallet_prelude::*, traits::StorageVersion};
 use frame_system::pallet_prelude::*;
@@ -752,3 +752,11 @@ impl<T: Config> NetworkEnvironmentProvider for Pallet<T> {
 		Self::network_environment()
 	}
 }
+
+pub struct NoUsedNonce<T: Config>(PhantomData<T>);
+
+impl<T: Config> ExecutionCondition for NoUsedNonce<T> {
+	fn is_satisfied() -> bool {
+		SolanaAvailableNonceAccounts::<T>::get().len() == 10
+	}
+}

state-chain/runtime/src/lib.rs

@@ -724,6 +724,7 @@ impl pallet_cf_governance::Config for Runtime {
 	type UpgradeCondition = (
 		pallet_cf_validator::NotDuringRotation<Runtime>,
 		pallet_cf_swapping::NoPendingSwaps<Runtime>,
+		pallet_cf_environment::NoUsedNonce<Runtime>,
 	);
 	type RuntimeUpgrade = chainflip::RuntimeUpgradeManager;
 	type CompatibleCfeVersions = Environment;

state-chain/traits/src/lib.rs

@@ -638,13 +638,14 @@ pub trait ExecutionCondition {
 	fn is_satisfied() -> bool;
 }
 
-impl<A, B> ExecutionCondition for (A, B)
+impl<A, B, C> ExecutionCondition for (A, B, C)
 where
 	A: ExecutionCondition,
 	B: ExecutionCondition,
+	C: ExecutionCondition,
 {
 	fn is_satisfied() -> bool {
-		A::is_satisfied() && B::is_satisfied()
+		A::is_satisfied() && B::is_satisfied() && C::is_satisfied()
 	}
 }