feat: support multiple relays in auth command

src/commands/auth.ts

@@ -4,6 +4,7 @@ import { existsSync, mkdirSync, rmSync, writeFileSync } from "node:fs";
 import { homedir } from "node:os";
 import { join } from "node:path";
 import {
+  DEFAULT_RELAY_URLS,
   getConnectionSecretPath,
   getPendingConnectionRelayPath,
   getPendingConnectionSecretPath,
@@ -28,8 +29,9 @@ export function registerAuthCommand(program: Command) {
     )
     .option(
       "--relay-url <url>",
-      "Relay URL for the pending connection",
-      "wss://relay.getalby.com/v1",
+      `Relay URL for the pending connection (repeat to use multiple relays, default: ${DEFAULT_RELAY_URLS.join(", ")})`,
+      (value: string, previous: string[]) => previous.concat([value]),
+      [] as string[],
     )
     .option("--force", "Overwrite existing connection secret")
     .option("--remove-pending", "Remove a pending connection and start fresh")
@@ -39,7 +41,7 @@ export function registerAuthCommand(program: Command) {
         options: {
           appName?: string;
           force?: boolean;
-          relayUrl: string;
+          relayUrl: string[];
           removePending?: boolean;
         },
       ) => {
@@ -83,6 +85,11 @@ export function registerAuthCommand(program: Command) {
             process.exit(1);
           }
 
+          const relayUrls =
+            options.relayUrl.length > 0
+              ? options.relayUrl
+              : DEFAULT_RELAY_URLS;
+
           const secret = bytesToHex(generateSecretKey());
           const pubkey = getPublicKey(hexToBytes(secret));
 
@@ -97,7 +104,11 @@ export function registerAuthCommand(program: Command) {
             mkdirSync(dir, { recursive: true });
           }
           writeFileSync(pendingSecretPath, secret, { mode: 0o600 });
-          writeFileSync(pendingRelayPath, options.relayUrl, { mode: 0o600 });
+          // Store one relay per line so multiple relays survive the
+          // round-trip to the completion step.
+          writeFileSync(pendingRelayPath, relayUrls.join("\n"), {
+            mode: 0o600,
+          });
 
           console.log(
             "Click the following URL to approve the connection in your wallet:\n" +

src/utils.ts

@@ -12,6 +12,11 @@ import {
 import { homedir } from "node:os";
 import { join } from "node:path";
 
+export const DEFAULT_RELAY_URLS = [
+  "wss://relay.getalby.com",
+  "wss://relay2.getalby.com",
+];
+
 function sanitizeWalletName(name: string): string {
   return name.replace(/[^a-zA-Z0-9_-]/g, "_");
 }
@@ -67,21 +72,28 @@ export async function testAndLogConnection(client: NWCClient) {
 export async function completePendingConnection(
   pendingSecretPath: string,
   connectionSecretPath: string,
-  relayUrl: string | undefined,
+  relayUrls: string[] | undefined,
   verbose: boolean,
   pendingRelayPath?: string,
 ): Promise<NWCClient> {
   const secret = readFileSync(pendingSecretPath, "utf-8").trim();
 
-  const DEFAULT_RELAY = "wss://relay.getalby.com/v1";
-  if (!relayUrl && pendingRelayPath && existsSync(pendingRelayPath)) {
-    relayUrl = readFileSync(pendingRelayPath, "utf-8").trim();
+  if (
+    (!relayUrls || relayUrls.length === 0) &&
+    pendingRelayPath &&
+    existsSync(pendingRelayPath)
+  ) {
+    relayUrls = readFileSync(pendingRelayPath, "utf-8")
+      .split("\n")
+      .map((line) => line.trim())
+      .filter((line) => line.length > 0);
   }
-  const resolvedRelay = relayUrl ?? DEFAULT_RELAY;
+  const resolvedRelays =
+    relayUrls && relayUrls.length > 0 ? relayUrls : DEFAULT_RELAY_URLS;
 
   const nwaClient = new NWAClient({
     appSecretKey: secret,
-    relayUrls: [resolvedRelay],
+    relayUrls: resolvedRelays,
     requestMethods: [],
   });