diff --git a/src/wallet/monero_wallet_core.cpp b/src/wallet/monero_wallet_core.cpp
index ff0767a..358e3a0 100644
--- a/src/wallet/monero_wallet_core.cpp
+++ b/src/wallet/monero_wallet_core.cpp
@@ -2494,6 +2494,16 @@ namespace monero {
     }
   }
 
+  string monero_wallet_core::sign_txs(const string& unsigned_tx_hex) {
+    cout << "monero_wallet_core::sign_txs()" << endl;
+    throw runtime_error("Not implemented");
+  }
+
+  vector<string> monero_wallet_core::submit_txs(const string& signed_tx_hex) {
+    cout << "monero_wallet_core::submit_txs()" << endl;
+    throw runtime_error("Not implemented");
+  }
+
   string monero_wallet_core::sign(const string& msg) const {
     return m_w2->sign(msg);
   }
diff --git a/src/wallet/monero_wallet_core.h b/src/wallet/monero_wallet_core.h
index 8a02c12..af2b48f 100644
--- a/src/wallet/monero_wallet_core.h
+++ b/src/wallet/monero_wallet_core.h
@@ -226,6 +226,8 @@ namespace monero {
     monero_tx_set sweep_output(const monero_send_request& request);
     monero_tx_set sweep_dust(bool do_not_relay = false);
     monero_tx_set parse_tx_set(const monero_tx_set& tx_set);
+    string sign_txs(const string& unsigned_tx_hex);
+    vector<string> submit_txs(const string& signed_tx_hex);
     string sign(const string& msg) const;
     bool verify(const string& msg, const string& address, const string& signature) const;
     string get_tx_key(const string& tx_hash) const;