perf(relays): local-first queries with short timeouts; fallback to remote if needed

src/utils/helpers.ts

@@ -63,3 +63,34 @@ export const hasRemoteRelay = (relayUrls: string[]): boolean => {
   return relayUrls.some(url => !isLocalRelay(url))
 }
 
+/**
+ * Splits relay URLs into local and remote groups
+ */
+export const partitionRelays = (
+  relayUrls: string[]
+): { local: string[]; remote: string[] } => {
+  const local: string[] = []
+  const remote: string[] = []
+  for (const url of relayUrls) {
+    if (isLocalRelay(url)) local.push(url)
+    else remote.push(url)
+  }
+  return { local, remote }
+}
+
+/**
+ * Returns relays ordered with local first while keeping uniqueness
+ */
+export const prioritizeLocalRelays = (relayUrls: string[]): string[] => {
+  const { local, remote } = partitionRelays(relayUrls)
+  const seen = new Set<string>()
+  const out: string[] = []
+  for (const url of [...local, ...remote]) {
+    if (!seen.has(url)) {
+      seen.add(url)
+      out.push(url)
+    }
+  }
+  return out
+}
+