fix: flashloan disabled guard for debt-swap and repay + do not allow permit for SC wallets (#2797)

Author: mgrabina

src/components/transactions/Swap/actions/approval/useSwapTokenApproval.ts

@@ -5,6 +5,7 @@ import { defaultAbiCoder, splitSignature } from 'ethers/lib/utils';
 import { Dispatch, useEffect, useMemo, useRef, useState } from 'react';
 import { MOCK_SIGNED_HASH } from 'src/helpers/useTransactionHandler';
 import { calculateSignedAmount } from 'src/hooks/paraswap/common';
+import { useGetConnectedWalletType } from 'src/hooks/useGetConnectedWalletType';
 import { useModalContext } from 'src/hooks/useModal';
 import { useWeb3Context } from 'src/libs/hooks/useWeb3Context';
 import { useRootStore } from 'src/store/root';
@@ -104,6 +105,8 @@ export const useSwapTokenApproval = ({
   const { sendTx, signTxData } = useWeb3Context();
   const [loadingPermitData, setLoadingPermitData] = useState(true);
 
+  const { isSmartContractWallet } = useGetConnectedWalletType();
+
   const [
     user,
     generateApproval,
@@ -256,7 +259,7 @@ export const useSwapTokenApproval = ({
     };
   }, [chainId, token]);
 
-  const tryPermit = allowPermit && permitSupported === true;
+  const tryPermit = allowPermit && permitSupported === true && !isSmartContractWallet;
   const usePermit = tryPermit && walletApprovalMethodPreference === ApprovalMethod.PERMIT;
 
   const approval = async () => {

src/components/transactions/Swap/errors/shared/FlashLoanDisabledBlockingGuard.tsx

@@ -10,11 +10,11 @@ export const hasFlashLoanDisabled = (state: SwapState): boolean => {
     return false;
   }
 
-  if (
-    state.useFlashloan === true &&
-    state.sourceReserve?.reserve &&
-    !state.sourceReserve.reserve.flashLoanEnabled
-  ) {
+  const reserve = !state.isInvertedSwap
+    ? state.sourceReserve?.reserve
+    : state.destinationReserve?.reserve;
+
+  if (state.useFlashloan === true && reserve && !reserve.flashLoanEnabled) {
     return true;
   }
 
@@ -70,6 +70,7 @@ export const FlashLoanDisabledBlockingGuard = ({
     state.provider,
     state.useFlashloan,
     state.sourceReserve?.reserve?.flashLoanEnabled,
+    state.destinationReserve?.reserve?.flashLoanEnabled,
     state.error,
   ]);