[GUI] Implement transaction broadcasting

Still need to set expiration, so none of the transactions I broadcast
work yet... :( Sadly there is no testnet so I can't finish this. Oh well.
I'm sure it'll be much easier on Monday.

libraries/app/api.cpp

@@ -564,7 +564,7 @@ namespace graphene { namespace app {
        _app.p2p_node()->broadcast_transaction(trx);
     }
 
-    void network_broadcast_api::broadcast_transaction_with_callback( confirmation_callback cb, const signed_transaction& trx)
+    void network_broadcast_api::broadcast_transaction_with_callback(confirmation_callback cb, const signed_transaction& trx)
     {
        trx.validate();
        _callbacks[trx.id()] = cb;

programs/light_client/Account.hpp

@@ -35,6 +35,9 @@ public:
       m_account.name = name.toStdString();
    }
    void setAccountObject(const account_object& obj);
+   const account_object& accountObject()const {
+      return m_account;
+   }
 
    QString name()const { return QString::fromStdString(m_account.name); }
    QString memoKey()const;

programs/light_client/ChainDataModel.cpp

@@ -1,6 +1,7 @@
 #include "ChainDataModel.hpp"
 #include "Balance.hpp"
 #include "Operations.hpp"
+#include "Transaction.hpp"
 
 #include <graphene/app/api.hpp>
 #include <graphene/chain/protocol/protocol.hpp>
@@ -26,11 +27,35 @@ void ChainDataModel::setDatabaseAPI(fc::api<database_api> dbapi) {
    m_db_api = dbapi;
    m_rpc_thread->async([this] {
       m_global_properties = m_db_api->get_global_properties();
-      m_db_api->subscribe_to_objects([this](const variant& v) { m_global_properties = v.as<global_property_object>(); },
-                                     {m_global_properties.id});
+      m_db_api->subscribe_to_objects([this](const variant& v) {
+         m_global_properties = v.as<global_property_object>();
+      }, {m_global_properties.id});
+
+      m_dynamic_global_properties = m_db_api->get_dynamic_global_properties();
+      m_db_api->subscribe_to_objects([this](const variant& d) {
+         m_dynamic_global_properties = d.as<dynamic_global_property_object>();
+      }, {m_dynamic_global_properties.id});
    });
 }
 
+void ChainDataModel::setNetworkAPI(fc::api<network_broadcast_api> napi)
+{
+   m_net_api = napi;
+}
+
+void ChainDataModel::broadcast(Transaction* transaction)
+{
+   try {
+      m_net_api->broadcast_transaction_with_callback([transaction](const fc::variant&) {
+         transaction->setStatus(Transaction::Complete);
+      }, transaction->internalTransaction());
+      transaction->setStatus(Transaction::Pending);
+   } catch (const fc::exception& e) {
+      transaction->setStatus(Transaction::Failed);
+      Q_EMIT exceptionThrown(QString::fromStdString(e.to_string()));
+   }
+}
+
 Asset* ChainDataModel::getAsset(ObjectId id)
 {
    auto& by_id_idx = m_assets.get<by_id>();

programs/light_client/ChainDataModel.hpp

@@ -34,6 +34,7 @@ typedef multi_index_container<
    >
 > account_multi_index_type;
 
+class Transaction;
 class ChainDataModel : public QObject {
    Q_OBJECT
 
@@ -52,8 +53,13 @@ public:
    ChainDataModel(fc::thread& t, QObject* parent = nullptr);
 
    void setDatabaseAPI(fc::api<graphene::app::database_api> dbapi);
+   void setNetworkAPI(fc::api<graphene::app::network_broadcast_api> napi);
 
    const graphene::chain::global_property_object& global_properties() const { return m_global_properties; }
+   const graphene::chain::dynamic_global_property_object& dynamic_global_properties() const { return m_dynamic_global_properties; }
+
+public Q_SLOTS:
+   void broadcast(Transaction* transaction);
 
 Q_SIGNALS:
    void queueExecute(const std::function<void()>&);
@@ -63,8 +69,10 @@ private:
    fc::thread* m_rpc_thread = nullptr;
    std::string m_api_url;
    fc::api<graphene::app::database_api> m_db_api;
+   fc::api<graphene::app::network_broadcast_api> m_net_api;
 
    graphene::chain::global_property_object m_global_properties;
+   graphene::chain::dynamic_global_property_object m_dynamic_global_properties;
 
    ObjectId m_account_query_num = -1;
    account_multi_index_type m_accounts;

programs/light_client/GrapheneApplication.cpp

@@ -64,10 +64,12 @@ void GrapheneApplication::start(QString apiurl, QString user, QString pass)
          Q_EMIT loginFailed();
          return;
       }
+      auto net_api = remote_api->network_broadcast();
 
       ilog("connecting...");
       queueExecute([=](){
          m_model->setDatabaseAPI(db_api);
+         m_model->setNetworkAPI(net_api);
       });
 
       queueExecute([=](){ setIsConnected(true); });
@@ -87,6 +89,26 @@ Transaction* GrapheneApplication::createTransaction() const
    return new Transaction;
 }
 
+void GrapheneApplication::signTransaction(Transaction* transaction) const
+{
+   if (transaction == nullptr) return;
+
+   auto getActiveAuth = [this](graphene::chain::account_id_type id) {
+      return &model()->getAccount(id.instance.value)->accountObject().active;
+   };
+   auto getOwnerAuth = [this](graphene::chain::account_id_type id) {
+      return &model()->getAccount(id.instance.value)->accountObject().owner;
+   };
+
+   auto& trx = transaction->internalTransaction();
+   trx.set_reference_block(model()->dynamic_global_properties().head_block_id);
+   flat_set<public_key_type> pubKeys = wallet()->getAvailablePrivateKeys();
+   auto requiredKeys = trx.get_required_signatures(pubKeys, getActiveAuth, getOwnerAuth);
+   trx.signatures = wallet()->signDigest(trx.digest(), requiredKeys);
+   idump((trx));
+}
+
+
 Q_SLOT void GrapheneApplication::execute(const std::function<void()>& func)const
 {
    func();

programs/light_client/GrapheneApplication.hpp

@@ -68,6 +68,7 @@ public:
 
    /// Convenience method to get a Transaction in QML. Caller takes ownership of the new Transaction.
    Q_INVOKABLE Transaction* createTransaction() const;
+   Q_INVOKABLE void signTransaction(Transaction* transaction) const;
 
 Q_SIGNALS:
    void exceptionThrown(QString message);

programs/light_client/Wallet.cpp

@@ -352,16 +352,6 @@ QList<QPair<QString,QString>> Wallet::getAllPublicKeys(bool only_if_private)cons
    return result;
 }
 
-void Wallet::sign(Transaction* transaction) const
-{
-   if (transaction == nullptr) return;
-
-   auto& trx = transaction->internalTransaction();
-   flat_set<public_key_type> pubKeys = getAvailablePrivateKeys();
-   trx.signatures = signDigest(trx.digest(), set<public_key_type>(pubKeys.begin(), pubKeys.end()));
-   idump((trx));
-}
-
 QString Wallet::getPublicKey(QString label)
 {
    if( !isOpen() ) return QString::null;

programs/light_client/Wallet.hpp

@@ -127,7 +127,6 @@ class Wallet : public QObject
       /**
        * @pre !isLocked()
        */
-      Q_INVOKABLE void sign(Transaction* transaction) const;
       vector<signature_type>           signDigest(const digest_type& d,
                                                   const set<public_key_type>& keys)const;
 

programs/light_client/qml/TransactionConfirmationForm.qml

@@ -65,6 +65,7 @@ FormBase {
    UnlockingFinishButtons {
       app: base.app
       Layout.fillWidth: true
+      rightButtonText: qsTr("Commit")
       onLeftButtonClicked: {
          canceled({})
          trx = null
@@ -73,7 +74,8 @@ FormBase {
          if (app.wallet.isLocked)
             app.wallet.unlock(passwordField.text)
          else {
-            app.wallet.sign(trx)
+            app.signTransaction(trx)
+            app.model.broadcast(trx)
             completed(trx)
          }
       }