Choose your own block explorer; flatten How it works

- Settings → Block explorer: pick mempool.space (default, with
  blockstream.info as a silent failover), blockstream.info only, or a
  custom Esplora/electrs REST URL (e.g. your own node). The realtime
  WebSocket only applies to mempool.space; other explorers fall back to
  polling. Switching rebuilds the API and rescans. Replaces the old
  undocumented explorer-proxy hack.
- How it works: merge the "For the technically curious" disclosure into
  the main body so it's all visible under "The basics", and dedupe the
  overlapping no-server/offline sentences. Mentions the new explorer
  setting.

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

1 files changed, 16 insertions, 1 deletions

diff --git a/src/wallet.js b/src/wallet.js
index 111fb92..0f71454 100644
--- a/src/wallet.js
+++ b/src/wallet.js
@@ -148,6 +148,19 @@ export class Wallet {
     this.emit();
   }
 
+  // Rebuild the Api against the currently-configured explorer, then rescan and
+  // reconnect realtime (called when the user switches explorer in Settings).
+  async reloadExplorer() {
+    this.stopRealtime();
+    this.api = new Api(this.netName);
+    this.api.offline = this.offline;
+    if (this.offline) return;
+    try {
+      await this.scan();
+    } catch {}
+    this.startRealtime();
+  }
+
   get netCfg() {
     return NETS[this.netName];
   }
@@ -683,7 +696,9 @@ export class Wallet {
     // Periodic full scan: reconciles everything refreshLive can't see on its own
     // — pending→confirmed history, spends, and stale cache/relay state.
     this._deepTimer = setInterval(() => this.scan({ silent: true }).catch(() => {}), 120000);
-    if (typeof WebSocket === 'undefined') return;
+    // Only mempool.space has a live socket; other explorers rely on the poll
+    // and deep scan above (wsUrl returns null → no socket).
+    if (typeof WebSocket === 'undefined' || !this.wsUrl()) return;
     this._wsWant = true;
 
     // Heartbeat: ping every 15s; if no message (incl. pong) for 45s the socket