use dummyNetwork for stellar

libs/stellar-util/stellar-util.js

@@ -5,5 +5,12 @@ window.stellarUtil = {
     getKeypair: function (path, seed) {
         const result = edHd.derivePath(path, seed);
         return StellarBase.Keypair.fromRawEd25519Seed(result.key);
-    }
+    },
+    dummyNetwork: {
+        bip32: {public: 0, private: 0},
+        messagePrefix: '',
+        pubKeyHash: 0,
+        scriptHash: 0,
+        wif: 0,
+    },
 }