diff --git a/dist/index.d.ts b/dist/index.d.ts
index 696ee7b..13488d4 100644
--- a/dist/index.d.ts
+++ b/dist/index.d.ts
@@ -9,5 +9,6 @@ export declare class PeerDiscovery {
     registerSource(name: string, source: PeerSource): boolean;
     removeSource(name: string): boolean;
     removeAllSources(): void;
+    sourceExists(name: string): boolean;
     discover(pubkey: string | Buffer, options?: {}): Promise<Peer | boolean>;
 }
diff --git a/dist/index.js b/dist/index.js
index 48758de..c45a9c3 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -24,6 +24,9 @@ class PeerDiscovery {
     removeAllSources() {
         this._sources.clear();
     }
+    sourceExists(name) {
+        return this._sources.has(name);
+    }
     async discover(pubkey, options = {}) {
         if (!b4a_1.default.isBuffer(pubkey)) {
             pubkey = b4a_1.default.from(pubkey, "hex");