tx fixes

ui/address/contract/ContractWrite.tsx

@@ -15,7 +15,7 @@ import { useContractContext } from './context';
 import ContractConnectWallet from './ContractConnectWallet';
 import ContractMethodCallable from './ContractMethodCallable';
 import ContractWriteResult from './ContractWriteResult';
-import { getNativeCoinValue } from './utils';
+import { getNativeCoinValue, isExtendedError } from './utils';
 
 interface Props {
   isProxy?: boolean;
@@ -68,11 +68,11 @@ const ContractWrite = ({ isProxy }: Props) => {
 
       return { hash: result.hash as string };
     } catch (error) {
-      if (error instanceof Error) {
+      if (isExtendedError(error)) {
         if ('reason' in error && error.reason === 'underlying network changed') {
 
-          if ('detectedNetwork' in error) {
-            const networkName = (error.detectedNetwork as { name: string }).name;
+          if ('detectedNetwork' in error && typeof error.detectedNetwork === 'object' && error.detectedNetwork !== null) {
+            const networkName = error.detectedNetwork.name;
             if (networkName) {
               throw new Error(
                 // eslint-disable-next-line max-len

ui/address/contract/utils.ts

@@ -6,3 +6,20 @@ export const getNativeCoinValue = (value: string | Array<string>) => {
   const _value = Array.isArray(value) ? value[0] : value;
   return BigNumber(_value).times(10 ** config.network.currency.decimals).toString();
 };
+
+interface ExtendedError extends Error {
+  detectedNetwork?: {
+    chain: number;
+    name: string;
+  };
+  reason?: string;
+}
+
+export function isExtendedError(error: unknown): error is ExtendedError {
+  return (
+    typeof error === 'object' &&
+    error !== null &&
+    'message' in error &&
+    typeof (error as Record<string, unknown>).message === 'string'
+  );
+}