global: private xpub support part 2

website_next/wallets/add/source.js

@@ -0,0 +1,23 @@
+import { isOutputDescriptor } from "../derive/index.js";
+
+const EXTENDED_PUBLIC_KEY_PATTERN =
+  /\b(?:xpub|ypub|zpub|tpub|upub|vpub)[1-9A-HJ-NP-Za-km-z]{20,}\b/;
+
+/**
+ * @param {string} text
+ */
+export function readWalletSourceText(text) {
+  const value = text.trim();
+
+  if (isOutputDescriptor(value)) {
+    return value;
+  }
+
+  const match = value.match(EXTENDED_PUBLIC_KEY_PATTERN);
+
+  if (match) {
+    return match[0];
+  }
+
+  throw new Error("Expected an xpub or descriptor");
+}