make tx keys available to the user

They are also stored in the cache file, to be retrieved using
a new get_tx_key command.

1 files changed, 11 insertions, 3 deletions

diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index ffe9ad0e5..abda1c54a 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -120,6 +120,7 @@ namespace tools
       cryptonote::tx_destination_entry change_dts;
       std::list<transfer_container::iterator> selected_transfers;
       std::string key_images;
+      crypto::secret_key tx_key;
     };
 
     struct keys_file_data
@@ -251,6 +252,9 @@ namespace tools
       if(ver < 7)
         return;
       a & m_payments;
+      if(ver < 8)
+        return;
+      a & m_tx_keys;
     }
 
     /*!
@@ -278,6 +282,8 @@ namespace tools
     bool always_confirm_transfers() const { return m_always_confirm_transfers; }
     void always_confirm_transfers(bool always) { m_always_confirm_transfers = always; }
 
+    bool get_tx_key(const crypto::hash &txid, crypto::secret_key &tx_key) const;
+
   private:
     /*!
      * \brief  Stores wallet information to wallet file.
@@ -316,6 +322,7 @@ namespace tools
     std::vector<crypto::hash> m_blockchain;
     std::atomic<uint64_t> m_local_bc_height; //temporary workaround
     std::unordered_map<crypto::hash, unconfirmed_transfer_details> m_unconfirmed_txs;
+    std::unordered_map<crypto::hash, crypto::secret_key> m_tx_keys;
 
     transfer_container m_transfers;
     payment_container m_payments;
@@ -334,7 +341,7 @@ namespace tools
     bool m_always_confirm_transfers;
   };
 }
-BOOST_CLASS_VERSION(tools::wallet2, 7)
+BOOST_CLASS_VERSION(tools::wallet2, 8)
 
 namespace boost
 {
@@ -565,7 +572,8 @@ namespace tools
       splitted_dsts.push_back(cryptonote::tx_destination_entry(dust, dust_policy.addr_for_dust));
     }
 
-    bool r = cryptonote::construct_tx(m_account.get_keys(), sources, splitted_dsts, extra, tx, unlock_time);
+    crypto::secret_key tx_key;
+    bool r = cryptonote::construct_tx(m_account.get_keys(), sources, splitted_dsts, extra, tx, unlock_time, tx_key);
     THROW_WALLET_EXCEPTION_IF(!r, error::tx_not_constructed, sources, splitted_dsts, unlock_time, m_testnet);
     THROW_WALLET_EXCEPTION_IF(m_upper_transaction_size_limit <= get_object_blobsize(tx), error::tx_too_big, tx, m_upper_transaction_size_limit);
 
@@ -584,7 +592,7 @@ namespace tools
     ptx.tx = tx;
     ptx.change_dts = change_dts;
     ptx.selected_transfers = selected_transfers;
-
+    ptx.tx_key = tx_key;
   }