src/qt/paymentserver.h

   1 // Copyright (c) 2011-2016 The Bitcoin Core developers
   2 // Distributed under the MIT software license, see the accompanying
   3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   4
   5 #ifndef BITCOIN_QT_PAYMENTSERVER_H
   6 #define BITCOIN_QT_PAYMENTSERVER_H
   7
   8 // This class handles payment requests from clicking on
   9 // bitcoin: URIs
  10 //
  11 // This is somewhat tricky, because we have to deal with
  12 // the situation where the user clicks on a link during
  13 // startup/initialization, when the splash-screen is up
  14 // but the main window (and the Send Coins tab) is not.
  15 //
  16 // So, the strategy is:
  17 //
  18 // Create the server, and register the event handler,
  19 // when the application is created. Save any URIs
  20 // received at or during startup in a list.
  21 //
  22 // When startup is finished and the main window is
  23 // shown, a signal is sent to slot uiReady(), which
  24 // emits a receivedURI() signal for any payment
  25 // requests that happened during startup.
  26 //
  27 // After startup, receivedURI() happens as usual.
  28 //
  29 // This class has one more feature: a static
  30 // method that finds URIs passed in the command line
  31 // and, if a server is running in another process,
  32 // sends them to the server.
  33 //
  34
  35 #include "paymentrequestplus.h"
  36 #include "walletmodel.h"
  37
  38 #include <QObject>
  39 #include <QString>
  40
  41 class OptionsModel;
  42
  43 class CWallet;
  44
  45 QT_BEGIN_NAMESPACE
  46 class QApplication;
  47 class QByteArray;
  48 class QLocalServer;
  49 class QNetworkAccessManager;
  50 class QNetworkReply;
  51 class QSslError;
  52 class QUrl;
  53 QT_END_NAMESPACE
  54
  55 // BIP70 max payment request size in bytes (DoS protection)
  56 static const qint64 BIP70_MAX_PAYMENTREQUEST_SIZE = 50000;
  57
  58 class PaymentServer : public QObject
  59 {
  60     Q_OBJECT
  61
  62 public:
  63     // Parse URIs on command line
  64     // Returns false on error
  65     static void ipcParseCommandLine(int argc, char *argv[]);
  66
  67     // Returns true if there were URIs on the command line
  68     // which were successfully sent to an already-running
  69     // process.
  70     // Note: if a payment request is given, SelectParams(MAIN/TESTNET)
  71     // will be called so we startup in the right mode.
  72     static bool ipcSendCommandLine();
  73
  74     // parent should be QApplication object
  75     explicit PaymentServer(QObject* parent, bool startLocalServer = true);
  76     ~PaymentServer();
  77
  78     // Load root certificate authorities. Pass nullptr (default)
  79     // to read from the file specified in the -rootcertificates setting,
  80     // or, if that's not set, to use the system default root certificates.
  81     // If you pass in a store, you should not X509_STORE_free it: it will be
  82     // freed either at exit or when another set of CAs are loaded.
  83     static void LoadRootCAs(X509_STORE* store = nullptr);
  84
  85     // Return certificate store
  86     static X509_STORE* getCertStore();
  87
  88     // OptionsModel is used for getting proxy settings and display unit
  89     void setOptionsModel(OptionsModel *optionsModel);
  90
  91     // Verify that the payment request network matches the client network
  92     static bool verifyNetwork(const payments::PaymentDetails& requestDetails);
  93     // Verify if the payment request is expired
  94     static bool verifyExpired(const payments::PaymentDetails& requestDetails);
  95     // Verify the payment request size is valid as per BIP70
  96     static bool verifySize(qint64 requestSize);
  97     // Verify the payment request amount is valid
  98     static bool verifyAmount(const CAmount& requestAmount);
  99
 100 Q_SIGNALS:
 101     // Fired when a valid payment request is received
 102     void receivedPaymentRequest(SendCoinsRecipient);
 103
 104     // Fired when a valid PaymentACK is received
 105     void receivedPaymentACK(const QString &paymentACKMsg);
 106
 107     // Fired when a message should be reported to the user
 108     void message(const QString &title, const QString &message, unsigned int style);
 109
 110 public Q_SLOTS:
 111     // Signal this when the main window's UI is ready
 112     // to display payment requests to the user
 113     void uiReady();
 114
 115     // Submit Payment message to a merchant, get back PaymentACK:
 116     void fetchPaymentACK(CWallet* wallet, const SendCoinsRecipient& recipient, QByteArray transaction);
 117
 118     // Handle an incoming URI, URI with local file scheme or file
 119     void handleURIOrFile(const QString& s);
 120
 121 private Q_SLOTS:
 122     void handleURIConnection();
 123     void netRequestFinished(QNetworkReply*);
 124     void reportSslErrors(QNetworkReply*, const QList<QSslError> &);
 125     void handlePaymentACK(const QString& paymentACKMsg);
 126
 127 protected:
 128     // Constructor registers this on the parent QApplication to
 129     // receive QEvent::FileOpen and QEvent:Drop events
 130     bool eventFilter(QObject *object, QEvent *event);
 131
 132 private:
 133     static bool readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request);
 134     bool processPaymentRequest(const PaymentRequestPlus& request, SendCoinsRecipient& recipient);
 135     void fetchRequest(const QUrl& url);
 136
 137     // Setup networking
 138     void initNetManager();
 139
 140     bool saveURIs;                      // true during startup
 141     QLocalServer* uriServer;
 142
 143     QNetworkAccessManager* netManager;  // Used to fetch payment requests
 144
 145     OptionsModel *optionsModel;
 146 };
 147
 148 #endif // BITCOIN_QT_PAYMENTSERVER_H