Small fixes

src/transaction/NavButton.tsx

@@ -3,7 +3,7 @@ import { transactionURL } from "../url";
 
 // TODO: extract common component with block/NavButton
 type NavButtonProps = {
-  txHash: string | undefined;
+  txHash: string | null | undefined;
   disabled?: boolean;
 };
 
@@ -12,7 +12,7 @@ const NavButton: React.FC<NavButtonProps> = ({
   disabled,
   children,
 }) => {
-  if (disabled || txHash === undefined) {
+  if (disabled || txHash === null || txHash === undefined) {
     return (
       <span className="bg-link-blue bg-opacity-10 text-gray-300 rounded px-2 py-1 text-xs">
         {children}

src/useErigonHooks.ts

@@ -530,7 +530,7 @@ const getTransactionBySenderAndNonceFetcher = async ({
   provider,
   sender,
   nonce,
-}: TransactionBySenderAndNonceKey): Promise<string | undefined> => {
+}: TransactionBySenderAndNonceKey): Promise<string | null | undefined> => {
   if (nonce < 0) {
     return undefined;
   }
@@ -541,10 +541,6 @@ const getTransactionBySenderAndNonceFetcher = async ({
   ])) as string;
 
   // Empty or success
-  if (result === "0x") {
-    return undefined;
-  }
-
   return result;
 };
 
@@ -564,9 +560,9 @@ export const useTransactionBySenderAndNonce = (
   provider: JsonRpcProvider | undefined,
   sender: ChecksummedAddress | undefined,
   nonce: number | undefined
-): string | undefined => {
+): string | null | undefined => {
   const { data, error } = useSWR<
-    string | undefined,
+    string | null | undefined,
     any,
     TransactionBySenderAndNonceKey | null
   >(