feat: search by txn hash in UI

ui/src/app/bundles/page.tsx

@@ -1,14 +1,57 @@
 "use client";
 
 import Link from "next/link";
-import { useEffect, useState } from "react";
+import { useCallback, useEffect, useRef, useState } from "react";
 import type { Bundle } from "@/app/api/bundles/route";
 
 export default function BundlesPage() {
   const [liveBundles, setLiveBundles] = useState<Bundle[]>([]);
   const [allBundles, setAllBundles] = useState<string[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
+  const [searchHash, setSearchHash] = useState<string>("");
+  const [filteredLiveBundles, setFilteredLiveBundles] = useState<Bundle[]>([]);
+  const [filteredAllBundles, setFilteredAllBundles] = useState<string[]>([]);
+  const debounceTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+
+  const filterBundles = useCallback(
+    async (searchTerm: string, live: Bundle[], all: string[]) => {
+      if (!searchTerm.trim()) {
+        setFilteredLiveBundles(live);
+        setFilteredAllBundles(all);
+        return;
+      }
+
+      // Filter live bundles immediately for better UX
+      const liveBundlesWithTx = live.filter((bundle) =>
+        bundle.txnHashes?.some((hash) =>
+          hash.toLowerCase().includes(searchTerm.toLowerCase()),
+        ),
+      );
+
+      let allBundlesWithTx: string[] = [];
+
+      try {
+        const response = await fetch(`/api/txn/${searchTerm.trim()}`);
+
+        if (response.ok) {
+          const txnData = await response.json();
+          const bundleIds = txnData.bundle_ids || [];
+
+          allBundlesWithTx = all.filter((bundleId) =>
+            bundleIds.includes(bundleId),
+          );
+        }
+      } catch (err) {
+        console.error("Error filtering bundles:", err);
+      }
+
+      // Batch all state updates together to prevent jitter
+      setFilteredLiveBundles(liveBundlesWithTx);
+      setFilteredAllBundles(allBundlesWithTx);
+    },
+    [],
+  );
 
   useEffect(() => {
     const fetchLiveBundles = async () => {
@@ -56,6 +99,28 @@ export default function BundlesPage() {
     return () => clearInterval(interval);
   }, []);
 
+  useEffect(() => {
+    if (debounceTimeoutRef.current) {
+      clearTimeout(debounceTimeoutRef.current);
+    }
+
+    if (!searchHash.trim()) {
+      // No debounce for clearing search
+      filterBundles(searchHash, liveBundles, allBundles);
+    } else {
+      // Debounce API calls for non-empty search
+      debounceTimeoutRef.current = setTimeout(() => {
+        filterBundles(searchHash, liveBundles, allBundles);
+      }, 300);
+    }
+
+    return () => {
+      if (debounceTimeoutRef.current) {
+        clearTimeout(debounceTimeoutRef.current);
+      }
+    };
+  }, [searchHash, liveBundles, allBundles, filterBundles]);
+
   if (loading) {
     return (
       <div className="flex flex-col gap-4 p-8">
@@ -68,18 +133,36 @@ export default function BundlesPage() {
   return (
     <div className="flex flex-col gap-8 p-8">
       <div className="flex flex-col gap-2">
-        <h1 className="text-2xl font-bold">BundleStore (fka Mempool)</h1>
+        <div className="flex items-center justify-between">
+          <h1 className="text-2xl font-bold">BundleStore (fka Mempool)</h1>
+          <div className="flex items-center gap-2">
+            <input
+              type="text"
+              placeholder="Search by transaction hash..."
+              value={searchHash}
+              onChange={(e) => setSearchHash(e.target.value)}
+              className="px-3 py-2 border rounded-lg bg-white/5 border-gray-300 dark:border-gray-600 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-transparent placeholder-gray-500 dark:placeholder-gray-400 text-sm min-w-[300px]"
+            />
+          </div>
+        </div>
         {error && (
           <div className="text-sm text-red-600 dark:text-red-400">{error}</div>
         )}
       </div>
 
       <div className="flex flex-col gap-6">
         <section>
-          <h2 className="text-xl font-semibold mb-4">Live Bundles</h2>
-          {liveBundles.length > 0 ? (
+          <h2 className="text-xl font-semibold mb-4">
+            Live Bundles
+            {searchHash.trim() && (
+              <span className="text-sm font-normal text-gray-500 ml-2">
+                ({filteredLiveBundles.length} found)
+              </span>
+            )}
+          </h2>
+          {filteredLiveBundles.length > 0 ? (
             <ul className="space-y-2">
-              {liveBundles.map((bundle) => (
+              {filteredLiveBundles.map((bundle) => (
                 <li key={bundle.id}>
                   <Link
                     href={`/bundles/${bundle.id}`}
@@ -110,16 +193,25 @@ export default function BundlesPage() {
             </ul>
           ) : (
             <p className="text-gray-600 dark:text-gray-400">
-              No live bundles found.
+              {searchHash.trim()
+                ? "No live bundles found matching this transaction hash."
+                : "No live bundles found."}
             </p>
           )}
         </section>
 
         <section>
-          <h2 className="text-xl font-semibold mb-4">All Bundles</h2>
-          {allBundles.length > 0 ? (
+          <h2 className="text-xl font-semibold mb-4">
+            All Bundles
+            {searchHash.trim() && (
+              <span className="text-sm font-normal text-gray-500 ml-2">
+                ({filteredAllBundles.length} found)
+              </span>
+            )}
+          </h2>
+          {filteredAllBundles.length > 0 ? (
             <ul className="space-y-2">
-              {allBundles.map((bundleId) => (
+              {filteredAllBundles.map((bundleId) => (
                 <li key={bundleId}>
                   <Link
                     href={`/bundles/${bundleId}`}
@@ -132,7 +224,9 @@ export default function BundlesPage() {
             </ul>
           ) : (
             <p className="text-gray-600 dark:text-gray-400">
-              No bundles found in S3.
+              {searchHash.trim()
+                ? "No bundles found in S3 matching this transaction hash."
+                : "No bundles found in S3."}
             </p>
           )}
         </section>