Check balance overflow

Author: icodezjb

frame/evm/src/runner/stack.rs

@@ -19,7 +19,7 @@
 
 use crate::{
 	chainx_value_shrink, runner::Runner as RunnerT, AccountCodes, AccountStorages, AddressMapping,
-	BlockHashMapping, Config, Error, Event, FeeCalculator, OnChargeEVMTransaction, Pallet,
+	BlockHashMapping, Config, Error, Event, FeeCalculator, OnChargeEVMTransaction, Pallet, BalanceOf
 };
 use evm::{
 	backend::Backend as BackendT,
@@ -41,7 +41,10 @@ pub struct Runner<T: Config> {
 	_marker: PhantomData<T>,
 }
 
-impl<T: Config> Runner<T> {
+impl<T: Config> Runner<T>
+where
+	BalanceOf<T>: TryFrom<U256> + Into<U256>,
+{
 	/// Execute an EVM operation.
 	pub fn execute<'config, 'precompiles, F, R>(
 		source: H160,
@@ -223,7 +226,10 @@ impl<T: Config> Runner<T> {
 	}
 }
 
-impl<T: Config> RunnerT<T> for Runner<T> {
+impl<T: Config> RunnerT<T> for Runner<T>
+where
+	BalanceOf<T>: TryFrom<U256> + Into<U256>,
+{
 	type Error = Error<T>;
 
 	fn call(
@@ -521,6 +527,8 @@ impl<'vicinity, 'config, T: Config> BackendT for SubstrateStackState<'vicinity,
 
 impl<'vicinity, 'config, T: Config> StackStateT<'config>
 	for SubstrateStackState<'vicinity, 'config, T>
+where
+	BalanceOf<T>: TryFrom<U256> + Into<U256>,
 {
 	fn metadata(&self) -> &StackSubstateMetadata<'config> {
 		self.substate.metadata()
@@ -611,10 +619,12 @@ impl<'vicinity, 'config, T: Config> StackStateT<'config>
 		T::Currency::transfer(
 			&source,
 			&target,
-			value.low_u128().unique_saturated_into(),
+			value
+				.try_into()
+				.map_err(|_| ExitError::OutOfFund)?,
 			ExistenceRequirement::AllowDeath,
 		)
-		.map_err(|_| ExitError::OutOfFund)
+			.map_err(|_| ExitError::OutOfFund)
 	}
 
 	fn reset_balance(&mut self, _address: H160) {