feat: Reliable Peer Discovery (#408)

* feat(swap): Allow discovery at multiple rendezvous points, request quotes from locally stored peers

- Ensure uniqueness of the peer_addresses table (no duplicate entries)
- Add peer to local database even if we just request a quote, and no swap (call to list_sellers)
- Refactor list_sellers to take multiple rendezvous points
- Allow db to be passed into list_sellers, if so request quote from all locally stored peers

* feat: editable list of rendezvous points in settings, new maker box on help page

* Recover old commits

* fix small compile errors due to rebase

* amend

* fixes

* fix(gui): Do not display "Core components are loading..." spinner

* fix(gui): Prefer makers with m.minSwapAmount > 0 BTC

* feat(cli, gui): Fetch version of maker

* feat: display progress bar

src-gui/src/renderer/background.ts

@@ -20,6 +20,7 @@ import {
   checkContextAvailability,
   getSwapInfo,
   initializeContext,
+  listSellersAtRendezvousPoint,
   updateAllNodeStatuses,
 } from "./rpc";
 import { store } from "./store/storeRenderer";
@@ -30,6 +31,9 @@ const TAURI_UNIFIED_EVENT_CHANNEL_NAME = "tauri-unified-event";
 // Update the public registry every 5 minutes
 const PROVIDER_UPDATE_INTERVAL = 5 * 60 * 1_000;
 
+// Discover peers every 5 minutes
+const DISCOVER_PEERS_INTERVAL = 5 * 60 * 1_000;
+
 // Update node statuses every 2 minutes
 const STATUS_UPDATE_INTERVAL = 2 * 60 * 1_000;
 
@@ -50,6 +54,11 @@ export async function setupBackgroundTasks(): Promise<void> {
   setIntervalImmediate(updateAllNodeStatuses, STATUS_UPDATE_INTERVAL);
   setIntervalImmediate(updateRates, UPDATE_RATE_INTERVAL);
   setIntervalImmediate(fetchAllConversations, FETCH_CONVERSATIONS_INTERVAL);
+  setIntervalImmediate(
+    () =>
+      listSellersAtRendezvousPoint(store.getState().settings.rendezvousPoints),
+    DISCOVER_PEERS_INTERVAL,
+  );
 
   // Fetch all alerts
   updateAlerts();