Fix: recovery phrase (#201)

app/src/types/mnemonic.ts

@@ -0,0 +1,26 @@
+export interface Mnemonic {
+  /**
+   *  The mnemonic phrase of 12, 15, 18, 21 or 24 words.
+   *
+   *  Use the [[wordlist]] ``split`` method to get the individual words.
+   */
+  readonly phrase: string;
+
+  /**
+   *  The password used for this mnemonic. If no password is used this
+   *  is the empty string (i.e. ``""``) as per the specification.
+   */
+  readonly password: string;
+
+  /**
+   *  The wordlist for this mnemonic.
+   */
+  readonly wordlist: {
+    readonly locale: string;
+  };
+
+  /**
+   *  The underlying entropy which the mnemonic encodes.
+   */
+  readonly entropy: string;
+}