sign_txs() returns monero_tx_set instead of string

src/wallet/monero_wallet.h

@@ -941,16 +941,16 @@ namespace monero {
      * Sign unsigned transactions from a view-only wallet.
      *
      * @param unsigned_tx_hex is unsigned transaction hex from when the transactions were created
-     * @return the signed transaction hex
+     * @return the signed transaction set
      */
-    virtual std::string sign_txs(const std::string& unsigned_tx_hex) {
+    virtual monero_tx_set sign_txs(const std::string& unsigned_tx_hex) {
       throw std::runtime_error("sign_txs() not supported");
     }
 
     /**
      * Submit signed transactions from a view-only wallet.
      *
-     * @param signed_tx_hex is signed transaction hex from signTxs()
+     * @param signed_tx_hex is signed transaction hex from sign_txs()
      * @return the resulting transaction hashes
      */
     virtual std::vector<std::string> submit_txs(const std::string& signed_tx_hex) {

src/wallet/monero_wallet_full.cpp

@@ -2657,7 +2657,7 @@ namespace monero {
       int first_known_non_zero_change_index = -1;
       for (int64_t n = 0; n < tx_constructions.size(); ++n)
       {
-        // pre-initialize tx
+        // init tx
         std::shared_ptr<monero_tx_wallet> tx = std::make_shared<monero_tx_wallet>();
         tx->m_is_outgoing = true;
         tx->m_input_sum = 0;
@@ -2769,7 +2769,7 @@ namespace monero {
   }
 
   // implementation based on monero-project wallet_rpc_server.cpp::on_sign_transfer()
-  std::string monero_wallet_full::sign_txs(const std::string& unsigned_tx_hex) {
+  monero_tx_set monero_wallet_full::sign_txs(const std::string& unsigned_tx_hex) {
     if (m_w2->key_on_device()) throw std::runtime_error("command not supported by HW wallet");
     if (m_w2->watch_only()) throw std::runtime_error("command not supported by view-only wallet");
 
@@ -2780,11 +2780,28 @@ namespace monero {
     if(!m_w2->parse_unsigned_tx_from_str(blob, exported_txs)) throw std::runtime_error("cannot load unsigned_txset");
 
     std::vector<tools::wallet2::pending_tx> ptxs;
+    std::vector<std::shared_ptr<monero_tx_wallet>> txs;
     try {
       tools::wallet2::signed_tx_set signed_txs;
       std::string ciphertext = m_w2->sign_tx_dump_to_str(exported_txs, ptxs, signed_txs);
       if (ciphertext.empty()) throw std::runtime_error("Failed to sign unsigned tx");
-      return epee::string_tools::buff_to_hex_nodelimer(ciphertext);
+
+      // init tx set
+      monero_tx_set tx_set;
+      tx_set.m_signed_tx_hex = epee::string_tools::buff_to_hex_nodelimer(ciphertext);
+      for (auto &ptx : ptxs) {
+
+        // init tx
+        std::shared_ptr<monero_tx_wallet> tx = std::make_shared<monero_tx_wallet>();
+        tx->m_is_outgoing = true;
+        tx->m_hash = epee::string_tools::pod_to_hex(cryptonote::get_transaction_hash(ptx.tx));
+        tx->m_key = epee::string_tools::pod_to_hex(ptx.tx_key);
+        for (const crypto::secret_key& additional_tx_key : ptx.additional_tx_keys) {
+            tx->m_key = tx->m_key.get() += epee::string_tools::pod_to_hex(additional_tx_key);
+        }
+        tx_set.m_txs.push_back(tx);
+      }
+      return tx_set;
     } catch (const std::exception &e) {
       throw std::runtime_error(std::string("Failed to sign unsigned tx: ") + e.what());
     }

src/wallet/monero_wallet_full.h

@@ -204,7 +204,7 @@ namespace monero {
     std::vector<std::shared_ptr<monero_tx_wallet>> sweep_dust(bool relay = false) override;
     std::vector<std::string> relay_txs(const std::vector<std::string>& tx_metadatas) override;
     monero_tx_set describe_tx_set(const monero_tx_set& tx_set) override;
-    std::string sign_txs(const std::string& unsigned_tx_hex) override;
+    monero_tx_set sign_txs(const std::string& unsigned_tx_hex) override;
     std::vector<std::string> submit_txs(const std::string& signed_tx_hex) override;
     std::string sign_message(const std::string& msg, monero_message_signature_type signature_type, uint32_t account_idx = 0, uint32_t subaddress_idx = 0) const override;
     monero_message_signature_result verify_message(const std::string& msg, const std::string& address, const std::string& signature) const override;