Remove BIP70 Support

21 files changed, 6 insertions, 1822 deletions

diff --git a/src/qt/README.md b/src/qt/README.md
index 0eb18f7cd5..30c68db15b 100644
--- a/src/qt/README.md
+++ b/src/qt/README.md
@@ -50,7 +50,7 @@ Various dialogs, e.g. to open a URL. Inherit from [QDialog](https://doc.qt.io/qt
 
 ### paymentserver.(h/cpp)
 
-Used to process BIP21 and BIP70 (see https://github.com/bitcoin/bitcoin/pull/11622) payment URI / requests. Also handles URI based application switching (e.g. when following a bitcoin:... link from a browser).
+Used to process BIP21 payment URI requests. Also handles URI based application switching (e.g. when following a bitcoin:... link from a browser).
 
 ### walletview.(h/cpp)
 
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index f548dc9fe3..02a2a01bdd 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -337,10 +337,6 @@ void BitcoinApplication::initializeResult(bool success)
             window->setWalletController(m_wallet_controller);
             if (paymentServer) {
                 paymentServer->setOptionsModel(optionsModel);
-#ifdef ENABLE_BIP70
-                PaymentServer::LoadRootCAs();
-                connect(m_wallet_controller, &WalletController::coinsSent, paymentServer, &PaymentServer::fetchPaymentACK);
-#endif
             }
         }
 #endif // ENABLE_WALLET
@@ -396,14 +392,10 @@ WId BitcoinApplication::getMainWinId() const
 
 static void SetupUIArgs()
 {
-#if defined(ENABLE_WALLET) && defined(ENABLE_BIP70)
-    gArgs.AddArg("-allowselfsignedrootcertificates", strprintf("Allow self signed root certificates (default: %u)", DEFAULT_SELFSIGNED_ROOTCERTS), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::GUI);
-#endif
     gArgs.AddArg("-choosedatadir", strprintf("Choose data directory on startup (default: %u)", DEFAULT_CHOOSE_DATADIR), ArgsManager::ALLOW_ANY, OptionsCategory::GUI);
     gArgs.AddArg("-lang=<lang>", "Set language, for example \"de_DE\" (default: system locale)", ArgsManager::ALLOW_ANY, OptionsCategory::GUI);
     gArgs.AddArg("-min", "Start minimized", ArgsManager::ALLOW_ANY, OptionsCategory::GUI);
     gArgs.AddArg("-resetguisettings", "Reset all settings changed in the GUI", ArgsManager::ALLOW_ANY, OptionsCategory::GUI);
-    gArgs.AddArg("-rootcertificates=<file>", "Set SSL root certificates for payment request (default: -system-)", ArgsManager::ALLOW_ANY, OptionsCategory::GUI);
     gArgs.AddArg("-splash", strprintf("Show splash screen on startup (default: %u)", DEFAULT_SPLASHSCREEN), ArgsManager::ALLOW_ANY, OptionsCategory::GUI);
     gArgs.AddArg("-uiplatform", strprintf("Select platform to customize UI for (one of windows, macosx, other; default: %s)", BitcoinGUI::DEFAULT_UIPLATFORM), ArgsManager::ALLOW_ANY | ArgsManager::DEBUG_ONLY, OptionsCategory::GUI);
 }
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
index d047a82475..d74d0dbfeb 100644
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -18,7 +18,7 @@
 #include <netbase.h>
 #include <txdb.h> // for -dbcache defaults
 
-#include <QNetworkProxy>
+#include <QDebug>
 #include <QSettings>
 #include <QStringList>
 
@@ -483,24 +483,6 @@ void OptionsModel::setDisplayUnit(const QVariant &value)
     }
 }
 
-bool OptionsModel::getProxySettings(QNetworkProxy& proxy) const
-{
-    // Directly query current base proxy, because
-    // GUI settings can be overridden with -proxy.
-    proxyType curProxy;
-    if (m_node.getProxy(NET_IPV4, curProxy)) {
-        proxy.setType(QNetworkProxy::Socks5Proxy);
-        proxy.setHostName(QString::fromStdString(curProxy.proxy.ToStringIP()));
-        proxy.setPort(curProxy.proxy.GetPort());
-
-        return true;
-    }
-    else
-        proxy.setType(QNetworkProxy::NoProxy);
-
-    return false;
-}
-
 void OptionsModel::setRestartRequired(bool fRequired)
 {
     QSettings settings;
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
index b1231b7c7d..5791b47f28 100644
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -13,10 +13,6 @@ namespace interfaces {
 class Node;
 }
 
-QT_BEGIN_NAMESPACE
-class QNetworkProxy;
-QT_END_NAMESPACE
-
 extern const char *DEFAULT_GUI_PROXY_HOST;
 static constexpr unsigned short DEFAULT_GUI_PROXY_PORT = 9050;
 
@@ -73,7 +69,6 @@ public:
     bool getMinimizeOnClose() const { return fMinimizeOnClose; }
     int getDisplayUnit() const { return nDisplayUnit; }
     QString getThirdPartyTxUrls() const { return strThirdPartyTxUrls; }
-    bool getProxySettings(QNetworkProxy& proxy) const;
     bool getCoinControlFeatures() const { return fCoinControlFeatures; }
     const QString& getOverriddenByCommandLine() { return strOverriddenByCommandLine; }
 
diff --git a/src/qt/paymentrequest.proto b/src/qt/paymentrequest.proto
deleted file mode 100644
index d2721a34bd..0000000000
--- a/src/qt/paymentrequest.proto
+++ /dev/null
@@ -1,48 +0,0 @@
-//
-// Simple Bitcoin Payment Protocol messages
-//
-// Use fields 100+ for extensions;
-// to avoid conflicts, register extensions at:
-// https://en.bitcoin.it/wiki/Payment_Request
-//
-
-syntax = "proto2";
-
-package payments;
-option java_package = "org.bitcoin.protocols.payments";
-option java_outer_classname = "Protos";
-
-// Generalized form of "send payment to this/these bitcoin addresses"
-message Output {
-	optional uint64 amount = 1 [default = 0]; // amount is integer-number-of-satoshis
-	required bytes script = 2; // usually one of the standard Script forms
-}
-message PaymentDetails {
-        optional string network = 1 [default = "main"]; // "main" or "test"
-        repeated Output outputs = 2;        // Where payment should be sent
-        required uint64 time = 3;           // Timestamp; when payment request created
-        optional uint64 expires = 4;        // Timestamp; when this request should be considered invalid
-        optional string memo = 5;           // Human-readable description of request for the customer
-        optional string payment_url = 6;    // URL to send Payment and get PaymentACK
-        optional bytes merchant_data = 7;   // Arbitrary data to include in the Payment message
-}
-message PaymentRequest {
-        optional uint32 payment_details_version = 1 [default = 1];
-        optional string pki_type = 2 [default = "none"];  // none / x509+sha256 / x509+sha1
-        optional bytes pki_data = 3;                      // depends on pki_type
-        required bytes serialized_payment_details = 4;    // PaymentDetails
-        optional bytes signature = 5;                     // pki-dependent signature
-}
-message X509Certificates {
-        repeated bytes certificate = 1;    // DER-encoded X.509 certificate chain
-}
-message Payment {
-        optional bytes merchant_data = 1;  // From PaymentDetails.merchant_data
-        repeated bytes transactions = 2;   // Signed transactions that satisfy PaymentDetails.outputs
-        repeated Output refund_to = 3;     // Where to send refunds, if a refund is necessary
-        optional string memo = 4;          // Human-readable message for the merchant
-}
-message PaymentACK {
-        required Payment payment = 1;      // Payment message that triggered this ACK
-        optional string memo = 2;          // human-readable message for customer
-}
diff --git a/src/qt/paymentrequestplus.cpp b/src/qt/paymentrequestplus.cpp
deleted file mode 100644
index b962ab1ef2..0000000000
--- a/src/qt/paymentrequestplus.cpp
+++ /dev/null
@@ -1,213 +0,0 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-//
-// Wraps dumb protocol buffer paymentRequest
-// with some extra methods
-//
-
-#include <qt/paymentrequestplus.h>
-
-#include <util/system.h>
-
-#include <stdexcept>
-
-#include <openssl/x509_vfy.h>
-
-#include <QDateTime>
-#include <QDebug>
-#include <QSslCertificate>
-
-class SSLVerifyError : public std::runtime_error
-{
-public:
-    explicit SSLVerifyError(std::string err) : std::runtime_error(err) { }
-};
-
-bool PaymentRequestPlus::parse(const QByteArray& data)
-{
-    bool parseOK = paymentRequest.ParseFromArray(data.data(), data.size());
-    if (!parseOK) {
-        qWarning() << "PaymentRequestPlus::parse: Error parsing payment request";
-        return false;
-    }
-    if (paymentRequest.payment_details_version() > 1) {
-        qWarning() << "PaymentRequestPlus::parse: Received up-version payment details, version=" << paymentRequest.payment_details_version();
-        return false;
-    }
-
-    parseOK = details.ParseFromString(paymentRequest.serialized_payment_details());
-    if (!parseOK)
-    {
-        qWarning() << "PaymentRequestPlus::parse: Error parsing payment details";
-        paymentRequest.Clear();
-        return false;
-    }
-    return true;
-}
-
-bool PaymentRequestPlus::SerializeToString(std::string* output) const
-{
-    return paymentRequest.SerializeToString(output);
-}
-
-bool PaymentRequestPlus::IsInitialized() const
-{
-    return paymentRequest.IsInitialized();
-}
-
-bool PaymentRequestPlus::getMerchant(X509_STORE* certStore, QString& merchant) const
-{
-    merchant.clear();
-
-    if (!IsInitialized())
-        return false;
-
-    // One day we'll support more PKI types, but just
-    // x509 for now:
-    const EVP_MD* digestAlgorithm = nullptr;
-    if (paymentRequest.pki_type() == "x509+sha256") {
-        digestAlgorithm = EVP_sha256();
-    }
-    else if (paymentRequest.pki_type() == "x509+sha1") {
-        digestAlgorithm = EVP_sha1();
-    }
-    else if (paymentRequest.pki_type() == "none") {
-        qWarning() << "PaymentRequestPlus::getMerchant: Payment request: pki_type == none";
-        return false;
-    }
-    else {
-        qWarning() << "PaymentRequestPlus::getMerchant: Payment request: unknown pki_type " << QString::fromStdString(paymentRequest.pki_type());
-        return false;
-    }
-
-    payments::X509Certificates certChain;
-    if (!certChain.ParseFromString(paymentRequest.pki_data())) {
-        qWarning() << "PaymentRequestPlus::getMerchant: Payment request: error parsing pki_data";
-        return false;
-    }
-
-    std::vector<X509*> certs;
-    const QDateTime currentTime = QDateTime::currentDateTime();
-    for (int i = 0; i < certChain.certificate_size(); i++) {
-        QByteArray certData(certChain.certificate(i).data(), certChain.certificate(i).size());
-        QSslCertificate qCert(certData, QSsl::Der);
-        if (currentTime < qCert.effectiveDate() || currentTime > qCert.expiryDate()) {
-            qWarning() << "PaymentRequestPlus::getMerchant: Payment request: certificate expired or not yet active: " << qCert;
-            return false;
-        }
-        if (qCert.isBlacklisted()) {
-            qWarning() << "PaymentRequestPlus::getMerchant: Payment request: certificate blacklisted: " << qCert;
-            return false;
-        }
-        const unsigned char *data = (const unsigned char *)certChain.certificate(i).data();
-        X509 *cert = d2i_X509(nullptr, &data, certChain.certificate(i).size());
-        if (cert)
-            certs.push_back(cert);
-    }
-    if (certs.empty()) {
-        qWarning() << "PaymentRequestPlus::getMerchant: Payment request: empty certificate chain";
-        return false;
-    }
-
-    // The first cert is the signing cert, the rest are untrusted certs that chain
-    // to a valid root authority. OpenSSL needs them separately.
-    STACK_OF(X509) *chain = sk_X509_new_null();
-    for (int i = certs.size() - 1; i > 0; i--) {
-        sk_X509_push(chain, certs[i]);
-    }
-    X509 *signing_cert = certs[0];
-
-    // Now create a "store context", which is a single use object for checking,
-    // load the signing cert into it and verify.
-    X509_STORE_CTX *store_ctx = X509_STORE_CTX_new();
-    if (!store_ctx) {
-        qWarning() << "PaymentRequestPlus::getMerchant: Payment request: error creating X509_STORE_CTX";
-        return false;
-    }
-
-    char *website = nullptr;
-    bool fResult = true;
-    try
-    {
-        if (!X509_STORE_CTX_init(store_ctx, certStore, signing_cert, chain))
-        {
-            int error = X509_STORE_CTX_get_error(store_ctx);
-            throw SSLVerifyError(X509_verify_cert_error_string(error));
-        }
-
-        // Now do the verification!
-        int result = X509_verify_cert(store_ctx);
-        if (result != 1) {
-            int error = X509_STORE_CTX_get_error(store_ctx);
-            // For testing payment requests, we allow self signed root certs!
-            if (!(error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT && gArgs.GetBoolArg("-allowselfsignedrootcertificates", DEFAULT_SELFSIGNED_ROOTCERTS))) {
-                throw SSLVerifyError(X509_verify_cert_error_string(error));
-            } else {
-               qDebug() << "PaymentRequestPlus::getMerchant: Allowing self signed root certificate, because -allowselfsignedrootcertificates is true.";
-            }
-        }
-        X509_NAME *certname = X509_get_subject_name(signing_cert);
-
-        // Valid cert; check signature:
-        payments::PaymentRequest rcopy(paymentRequest); // Copy
-        rcopy.set_signature(std::string(""));
-        std::string data_to_verify;                     // Everything but the signature
-        rcopy.SerializeToString(&data_to_verify);
-
-#if HAVE_DECL_EVP_MD_CTX_NEW
-        EVP_MD_CTX *ctx = EVP_MD_CTX_new();
-        if (!ctx) throw SSLVerifyError("Error allocating OpenSSL context.");
-#else
-        EVP_MD_CTX _ctx;
-        EVP_MD_CTX *ctx;
-        ctx = &_ctx;
-#endif
-        EVP_PKEY *pubkey = X509_get_pubkey(signing_cert);
-        EVP_MD_CTX_init(ctx);
-        if (!EVP_VerifyInit_ex(ctx, digestAlgorithm, nullptr) ||
-            !EVP_VerifyUpdate(ctx, data_to_verify.data(), data_to_verify.size()) ||
-            !EVP_VerifyFinal(ctx, (const unsigned char*)paymentRequest.signature().data(), (unsigned int)paymentRequest.signature().size(), pubkey)) {
-            throw SSLVerifyError("Bad signature, invalid payment request.");
-        }
-#if HAVE_DECL_EVP_MD_CTX_NEW
-        EVP_MD_CTX_free(ctx);
-#endif
-
-        // OpenSSL API for getting human printable strings from certs is baroque.
-        int textlen = X509_NAME_get_text_by_NID(certname, NID_commonName, nullptr, 0);
-        website = new char[textlen + 1];
-        if (X509_NAME_get_text_by_NID(certname, NID_commonName, website, textlen + 1) == textlen && textlen > 0) {
-            merchant = website;
-        }
-        else {
-            throw SSLVerifyError("Bad certificate, missing common name.");
-        }
-        // TODO: detect EV certificates and set merchant = business name instead of unfriendly NID_commonName ?
-    }
-    catch (const SSLVerifyError& err) {
-        fResult = false;
-        qWarning() << "PaymentRequestPlus::getMerchant: SSL error: " << err.what();
-    }
-
-    delete[] website;
-    X509_STORE_CTX_free(store_ctx);
-    for (unsigned int i = 0; i < certs.size(); i++)
-        X509_free(certs[i]);
-
-    return fResult;
-}
-
-QList<std::pair<CScript,CAmount> > PaymentRequestPlus::getPayTo() const
-{
-    QList<std::pair<CScript,CAmount> > result;
-    for (int i = 0; i < details.outputs_size(); i++)
-    {
-        const unsigned char* scriptStr = (const unsigned char*)details.outputs(i).script().data();
-        CScript s(scriptStr, scriptStr+details.outputs(i).script().size());
-
-        result.append(std::make_pair(s, details.outputs(i).amount()));
-    }
-    return result;
-}
diff --git a/src/qt/paymentrequestplus.h b/src/qt/paymentrequestplus.h
deleted file mode 100644
index 3014628807..0000000000
--- a/src/qt/paymentrequestplus.h
+++ /dev/null
@@ -1,52 +0,0 @@
-// Copyright (c) 2011-2018 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef BITCOIN_QT_PAYMENTREQUESTPLUS_H
-#define BITCOIN_QT_PAYMENTREQUESTPLUS_H
-
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-#include <qt/paymentrequest.pb.h>
-#pragma GCC diagnostic pop
-
-#include <amount.h>
-#include <script/script.h>
-
-#include <openssl/x509.h>
-
-#include <QByteArray>
-#include <QList>
-#include <QString>
-
-static const bool DEFAULT_SELFSIGNED_ROOTCERTS = false;
-
-//
-// Wraps dumb protocol buffer paymentRequest
-// with extra methods
-//
-
-class PaymentRequestPlus
-{
-public:
-    PaymentRequestPlus() { }
-
-    bool parse(const QByteArray& data);
-    bool SerializeToString(std::string* output) const;
-
-    bool IsInitialized() const;
-    // Returns true if merchant's identity is authenticated, and
-    // returns human-readable merchant identity in merchant
-    bool getMerchant(X509_STORE* certStore, QString& merchant) const;
-
-    // Returns list of outputs, amount
-    QList<std::pair<CScript,CAmount> > getPayTo() const;
-
-    const payments::PaymentDetails& getDetails() const { return details; }
-
-private:
-    payments::PaymentRequest paymentRequest;
-    payments::PaymentDetails details;
-};
-
-#endif // BITCOIN_QT_PAYMENTREQUESTPLUS_H
diff --git a/src/qt/paymentserver.cpp b/src/qt/paymentserver.cpp
index 806cc3c41e..64fb3d6060 100644
--- a/src/qt/paymentserver.cpp
+++ b/src/qt/paymentserver.cpp
@@ -23,8 +23,6 @@
 #include <cstdlib>
 #include <memory>
 
-#include <openssl/x509_vfy.h>
-
 #include <QApplication>
 #include <QByteArray>
 #include <QDataStream>
@@ -36,28 +34,11 @@
 #include <QList>
 #include <QLocalServer>
 #include <QLocalSocket>
-#include <QNetworkAccessManager>
-#include <QNetworkProxy>
-#include <QNetworkReply>
-#include <QNetworkRequest>
-#include <QSslCertificate>
-#include <QSslConfiguration>
-#include <QSslError>
 #include <QStringList>
-#include <QTextDocument>
 #include <QUrlQuery>
 
 const int BITCOIN_IPC_CONNECT_TIMEOUT = 1000; // milliseconds
 const QString BITCOIN_IPC_PREFIX("bitcoin:");
-#ifdef ENABLE_BIP70
-// BIP70 payment protocol messages
-const char* BIP70_MESSAGE_PAYMENTACK = "PaymentACK";
-const char* BIP70_MESSAGE_PAYMENTREQUEST = "PaymentRequest";
-// BIP71 payment protocol media types
-const char* BIP71_MIMETYPE_PAYMENT = "application/bitcoin-payment";
-const char* BIP71_MIMETYPE_PAYMENTACK = "application/bitcoin-paymentack";
-const char* BIP71_MIMETYPE_PAYMENTREQUEST = "application/bitcoin-paymentrequest";
-#endif
 
 //
 // Create a name that is unique for:
@@ -125,32 +106,6 @@ void PaymentServer::ipcParseCommandLine(interfaces::Node& node, int argc, char*
                 }
             }
         }
-#ifdef ENABLE_BIP70
-        else if (QFile::exists(arg)) // Filename
-        {
-            if (savedPaymentRequests.contains(arg)) continue;
-            savedPaymentRequests.insert(arg);
-
-            PaymentRequestPlus request;
-            if (readPaymentRequestFromFile(arg, request))
-            {
-                if (request.getDetails().network() == "main")
-                {
-                    node.selectParams(CBaseChainParams::MAIN);
-                }
-                else if (request.getDetails().network() == "test")
-                {
-                    node.selectParams(CBaseChainParams::TESTNET);
-                }
-            }
-        }
-        else
-        {
-            // Printing to debug.log is about the best we can do here, the
-            // GUI hasn't started yet so we can't pop up a message box.
-            qWarning() << "PaymentServer::ipcSendCommandLine: Payment request file does not exist: " << arg;
-        }
-#endif
     }
 }
 
@@ -198,16 +153,7 @@ PaymentServer::PaymentServer(QObject* parent, bool startLocalServer) :
     saveURIs(true),
     uriServer(nullptr),
     optionsModel(nullptr)
-#ifdef ENABLE_BIP70
-    ,netManager(nullptr)
-#endif
 {
-#ifdef ENABLE_BIP70
-    // Verify that the version of the library that we linked against is
-    // compatible with the version of the headers we compiled against.
-    GOOGLE_PROTOBUF_VERIFY_VERSION;
-#endif
-
     // Install global event filter to catch QFileOpenEvents
     // on Mac: sent when you click bitcoin: links
     // other OSes: helpful when dealing with payment request files
@@ -230,18 +176,12 @@ PaymentServer::PaymentServer(QObject* parent, bool startLocalServer) :
         }
         else {
             connect(uriServer, &QLocalServer::newConnection, this, &PaymentServer::handleURIConnection);
-#ifdef ENABLE_BIP70
-            connect(this, &PaymentServer::receivedPaymentACK, this, &PaymentServer::handlePaymentACK);
-#endif
         }
     }
 }
 
 PaymentServer::~PaymentServer()
 {
-#ifdef ENABLE_BIP70
-    google::protobuf::ShutdownProtobufLibrary();
-#endif
 }
 
 //
@@ -266,10 +206,6 @@ bool PaymentServer::eventFilter(QObject *object, QEvent *event)
 
 void PaymentServer::uiReady()
 {
-#ifdef ENABLE_BIP70
-    initNetManager();
-#endif
-
     saveURIs = false;
     for (const QString& s : savedPaymentRequests)
     {
@@ -294,40 +230,12 @@ void PaymentServer::handleURIOrFile(const QString& s)
     else if (s.startsWith(BITCOIN_IPC_PREFIX, Qt::CaseInsensitive)) // bitcoin: URI
     {
         QUrlQuery uri((QUrl(s)));
-#ifdef ENABLE_BIP70
-        if (uri.hasQueryItem("r")) // payment request URI
-        {
-            Q_EMIT message(tr("URI handling"),
-                tr("You are using a BIP70 URL which will be unsupported in the future."),
-                CClientUIInterface::ICON_WARNING);
-            QByteArray temp;
-            temp.append(uri.queryItemValue("r"));
-            QString decoded = QUrl::fromPercentEncoding(temp);
-            QUrl fetchUrl(decoded, QUrl::StrictMode);
-
-            if (fetchUrl.isValid())
-            {
-                qDebug() << "PaymentServer::handleURIOrFile: fetchRequest(" << fetchUrl << ")";
-                fetchRequest(fetchUrl);
-            }
-            else
-            {
-                qWarning() << "PaymentServer::handleURIOrFile: Invalid URL: " << fetchUrl;
-                Q_EMIT message(tr("URI handling"),
-                    tr("Payment request fetch URL is invalid: %1").arg(fetchUrl.toString()),
-                    CClientUIInterface::ICON_WARNING);
-            }
-            return;
-        }
-        else
-#endif
         // normal URI
         {
             SendCoinsRecipient recipient;
             if (GUIUtil::parseBitcoinURI(s, &recipient))
             {
                 if (!IsValidDestinationString(recipient.address.toStdString())) {
-#ifndef ENABLE_BIP70
                     if (uri.hasQueryItem("r")) {  // payment request
                         Q_EMIT message(tr("URI handling"),
                             tr("Cannot process payment request because BIP70 support was not compiled in.")+
@@ -335,7 +243,6 @@ void PaymentServer::handleURIOrFile(const QString& s)
                             tr("If you are receiving this error you should request the merchant provide a BIP21 compatible URI."),
                             CClientUIInterface::ICON_WARNING);
                     }
-#endif
                     Q_EMIT message(tr("URI handling"), tr("Invalid payment address %1").arg(recipient.address),
                         CClientUIInterface::MSG_ERROR);
                 }
@@ -353,26 +260,11 @@ void PaymentServer::handleURIOrFile(const QString& s)
 
     if (QFile::exists(s)) // payment request file
     {
-#ifdef ENABLE_BIP70
-        PaymentRequestPlus request;
-        SendCoinsRecipient recipient;
-        if (!readPaymentRequestFromFile(s, request))
-        {
-            Q_EMIT message(tr("Payment request file handling"),
-                tr("Payment request file cannot be read! This can be caused by an invalid payment request file."),
-                CClientUIInterface::ICON_WARNING);
-        }
-        else if (processPaymentRequest(request, recipient))
-            Q_EMIT receivedPaymentRequest(recipient);
-
-        return;
-#else
         Q_EMIT message(tr("Payment request file handling"),
             tr("Cannot process payment request because BIP70 support was not compiled in.")+
             tr("Due to widespread security flaws in BIP70 it's strongly recommended that any merchant instructions to switch wallets be ignored.")+
             tr("If you are receiving this error you should request the merchant provide a BIP21 compatible URI."),
             CClientUIInterface::ICON_WARNING);
-#endif
     }
 }
 
@@ -400,440 +292,3 @@ void PaymentServer::setOptionsModel(OptionsModel *_optionsModel)
 {
     this->optionsModel = _optionsModel;
 }
-
-#ifdef ENABLE_BIP70
-struct X509StoreDeleter {
-      void operator()(X509_STORE* b) {
-          X509_STORE_free(b);
-      }
-};
-
-struct X509Deleter {
-      void operator()(X509* b) { X509_free(b); }
-};
-
-namespace // Anon namespace
-{
-    std::unique_ptr<X509_STORE, X509StoreDeleter> certStore;
-}
-
-static void ReportInvalidCertificate(const QSslCertificate& cert)
-{
-    qDebug() << QString("%1: Payment server found an invalid certificate: ").arg(__func__) << cert.serialNumber() << cert.subjectInfo(QSslCertificate::CommonName) << cert.subjectInfo(QSslCertificate::DistinguishedNameQualifier) << cert.subjectInfo(QSslCertificate::OrganizationalUnitName);
-}
-
-//
-// Load OpenSSL's list of root certificate authorities
-//
-void PaymentServer::LoadRootCAs(X509_STORE* _store)
-{
-    // Unit tests mostly use this, to pass in fake root CAs:
-    if (_store)
-    {
-        certStore.reset(_store);
-        return;
-    }
-
-    // Normal execution, use either -rootcertificates or system certs:
-    certStore.reset(X509_STORE_new());
-
-    // Note: use "-system-" default here so that users can pass -rootcertificates=""
-    // and get 'I don't like X.509 certificates, don't trust anybody' behavior:
-    QString certFile = QString::fromStdString(gArgs.GetArg("-rootcertificates", "-system-"));
-
-    // Empty store
-    if (certFile.isEmpty()) {
-        qDebug() << QString("PaymentServer::%1: Payment request authentication via X.509 certificates disabled.").arg(__func__);
-        return;
-    }
-
-    QList<QSslCertificate> certList;
-
-    if (certFile != "-system-") {
-            qDebug() << QString("PaymentServer::%1: Using \"%2\" as trusted root certificate.").arg(__func__).arg(certFile);
-
-        certList = QSslCertificate::fromPath(certFile);
-        // Use those certificates when fetching payment requests, too:
-        QSslConfiguration::defaultConfiguration().setCaCertificates(certList);
-    } else
-        certList = QSslConfiguration::systemCaCertificates();
-
-    int nRootCerts = 0;
-    const QDateTime currentTime = QDateTime::currentDateTime();
-
-    for (const QSslCertificate& cert : certList) {
-        // Don't log NULL certificates
-        if (cert.isNull())
-            continue;
-
-        // Not yet active/valid, or expired certificate
-        if (currentTime < cert.effectiveDate() || currentTime > cert.expiryDate()) {
-            ReportInvalidCertificate(cert);
-            continue;
-        }
-
-        // Blacklisted certificate
-        if (cert.isBlacklisted()) {
-            ReportInvalidCertificate(cert);
-            continue;
-        }
-
-        QByteArray certData = cert.toDer();
-        const unsigned char *data = (const unsigned char *)certData.data();
-
-        std::unique_ptr<X509, X509Deleter> x509(d2i_X509(0, &data, certData.size()));
-        if (x509 && X509_STORE_add_cert(certStore.get(), x509.get()))
-        {
-            // Note: X509_STORE increases the reference count to the X509 object,
-            // we still have to release our reference to it.
-            ++nRootCerts;
-        }
-        else
-        {
-            ReportInvalidCertificate(cert);
-            continue;
-        }
-    }
-    qInfo() << "PaymentServer::LoadRootCAs: Loaded " << nRootCerts << " root certificates";
-
-    // Project for another day:
-    // Fetch certificate revocation lists, and add them to certStore.
-    // Issues to consider:
-    //   performance (start a thread to fetch in background?)
-    //   privacy (fetch through tor/proxy so IP address isn't revealed)
-    //   would it be easier to just use a compiled-in blacklist?
-    //    or use Qt's blacklist?
-    //   "certificate stapling" with server-side caching is more efficient
-}
-
-void PaymentServer::initNetManager()
-{
-    if (!optionsModel)
-        return;
-    delete netManager;
-
-    // netManager is used to fetch paymentrequests given in bitcoin: URIs
-    netManager = new QNetworkAccessManager(this);
-
-    QNetworkProxy proxy;
-
-    // Query active SOCKS5 proxy
-    if (optionsModel->getProxySettings(proxy)) {
-        netManager->setProxy(proxy);
-
-        qDebug() << "PaymentServer::initNetManager: Using SOCKS5 proxy" << proxy.hostName() << ":" << proxy.port();
-    }
-    else
-        qDebug() << "PaymentServer::initNetManager: No active proxy server found.";
-
-    connect(netManager, &QNetworkAccessManager::finished, this, &PaymentServer::netRequestFinished);
-    connect(netManager, &QNetworkAccessManager::sslErrors, this, &PaymentServer::reportSslErrors);
-}
-
-//
-// Warning: readPaymentRequestFromFile() is used in ipcSendCommandLine()
-// so don't use "Q_EMIT message()", but "QMessageBox::"!
-//
-bool PaymentServer::readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request)
-{
-    QFile f(filename);
-    if (!f.open(QIODevice::ReadOnly)) {
-        qWarning() << QString("PaymentServer::%1: Failed to open %2").arg(__func__).arg(filename);
-        return false;
-    }
-
-    // BIP70 DoS protection
-    if (!verifySize(f.size())) {
-        return false;
-    }
-
-    QByteArray data = f.readAll();
-
-    return request.parse(data);
-}
-
-bool PaymentServer::processPaymentRequest(const PaymentRequestPlus& request, SendCoinsRecipient& recipient)
-{
-    if (!optionsModel)
-        return false;
-
-    if (request.IsInitialized()) {
-        // Payment request network matches client network?
-        if (!verifyNetwork(optionsModel->node(), request.getDetails())) {
-            Q_EMIT message(tr("Payment request rejected"), tr("Payment request network doesn't match client network."),
-                CClientUIInterface::MSG_ERROR);
-
-            return false;
-        }
-
-        // Make sure any payment requests involved are still valid.
-        // This is re-checked just before sending coins in WalletModel::sendCoins().
-        if (verifyExpired(request.getDetails())) {
-            Q_EMIT message(tr("Payment request rejected"), tr("Payment request expired."),
-                CClientUIInterface::MSG_ERROR);
-
-            return false;
-        }
-    } else {
-        Q_EMIT message(tr("Payment request error"), tr("Payment request is not initialized."),
-            CClientUIInterface::MSG_ERROR);
-
-        return false;
-    }
-
-    recipient.paymentRequest = request;
-    recipient.message = GUIUtil::HtmlEscape(request.getDetails().memo());
-
-    request.getMerchant(certStore.get(), recipient.authenticatedMerchant);
-
-    QList<std::pair<CScript, CAmount> > sendingTos = request.getPayTo();
-    QStringList addresses;
-
-    for (const std::pair<CScript, CAmount>& sendingTo : sendingTos) {
-        // Extract and check destination addresses
-        CTxDestination dest;
-        if (ExtractDestination(sendingTo.first, dest)) {
-            // Append destination address
-            addresses.append(QString::fromStdString(EncodeDestination(dest)));
-        }
-        else if (!recipient.authenticatedMerchant.isEmpty()) {
-            // Unauthenticated payment requests to custom bitcoin addresses are not supported
-            // (there is no good way to tell the user where they are paying in a way they'd
-            // have a chance of understanding).
-            Q_EMIT message(tr("Payment request rejected"),
-                tr("Unverified payment requests to custom payment scripts are unsupported."),
-                CClientUIInterface::MSG_ERROR);
-            return false;
-        }
-
-        // Bitcoin amounts are stored as (optional) uint64 in the protobuf messages (see paymentrequest.proto),
-        // but CAmount is defined as int64_t. Because of that we need to verify that amounts are in a valid range
-        // and no overflow has happened.
-        if (!verifyAmount(sendingTo.second)) {
-            Q_EMIT message(tr("Payment request rejected"), tr("Invalid payment request."), CClientUIInterface::MSG_ERROR);
-            return false;
-        }
-
-        // Extract and check amounts
-        CTxOut txOut(sendingTo.second, sendingTo.first);
-        if (IsDust(txOut, optionsModel->node().getDustRelayFee())) {
-            Q_EMIT message(tr("Payment request error"), tr("Requested payment amount of %1 is too small (considered dust).")
-                .arg(BitcoinUnits::formatWithUnit(optionsModel->getDisplayUnit(), sendingTo.second)),
-                CClientUIInterface::MSG_ERROR);
-
-            return false;
-        }
-
-        recipient.amount += sendingTo.second;
-        // Also verify that the final amount is still in a valid range after adding additional amounts.
-        if (!verifyAmount(recipient.amount)) {
-            Q_EMIT message(tr("Payment request rejected"), tr("Invalid payment request."), CClientUIInterface::MSG_ERROR);
-            return false;
-        }
-    }
-    // Store addresses and format them to fit nicely into the GUI
-    recipient.address = addresses.join("<br />");
-
-    if (!recipient.authenticatedMerchant.isEmpty()) {
-        qDebug() << "PaymentServer::processPaymentRequest: Secure payment request from " << recipient.authenticatedMerchant;
-    }
-    else {
-        qDebug() << "PaymentServer::processPaymentRequest: Insecure payment request to " << addresses.join(", ");
-    }
-
-    return true;
-}
-
-void PaymentServer::fetchRequest(const QUrl& url)
-{
-    QNetworkRequest netRequest;
-    netRequest.setAttribute(QNetworkRequest::User, BIP70_MESSAGE_PAYMENTREQUEST);
-    netRequest.setUrl(url);
-    netRequest.setRawHeader("User-Agent", CLIENT_NAME.c_str());
-    netRequest.setRawHeader("Accept", BIP71_MIMETYPE_PAYMENTREQUEST);
-    netManager->get(netRequest);
-}
-
-void PaymentServer::fetchPaymentACK(WalletModel* walletModel, const SendCoinsRecipient& recipient, QByteArray transaction)
-{
-    const payments::PaymentDetails& details = recipient.paymentRequest.getDetails();
-    if (!details.has_payment_url())
-        return;
-
-    QNetworkRequest netRequest;
-    netRequest.setAttribute(QNetworkRequest::User, BIP70_MESSAGE_PAYMENTACK);
-    netRequest.setUrl(QString::fromStdString(details.payment_url()));
-    netRequest.setHeader(QNetworkRequest::ContentTypeHeader, BIP71_MIMETYPE_PAYMENT);
-    netRequest.setRawHeader("User-Agent", CLIENT_NAME.c_str());
-    netRequest.setRawHeader("Accept", BIP71_MIMETYPE_PAYMENTACK);
-
-    payments::Payment payment;
-    payment.set_merchant_data(details.merchant_data());
-    payment.add_transactions(transaction.data(), transaction.size());
-
-    // Create a new refund address, or re-use:
-    CTxDestination dest;
-    const OutputType change_type = walletModel->wallet().getDefaultChangeType() != OutputType::CHANGE_AUTO ? walletModel->wallet().getDefaultChangeType() : walletModel->wallet().getDefaultAddressType();
-    if (walletModel->wallet().getNewDestination(change_type, "", dest)) {
-        // BIP70 requests encode the scriptPubKey directly, so we are not restricted to address
-        // types supported by the receiver. As a result, we choose the address format we also
-        // use for change. Despite an actual payment and not change, this is a close match:
-        // it's the output type we use subject to privacy issues, but not restricted by what
-        // other software supports.
-        std::string label = tr("Refund from %1").arg(recipient.authenticatedMerchant).toStdString();
-        walletModel->wallet().setAddressBook(dest, label, "refund");
-
-        CScript s = GetScriptForDestination(dest);
-        payments::Output* refund_to = payment.add_refund_to();
-        refund_to->set_script(&s[0], s.size());
-    } else {
-        // This should never happen, because sending coins should have
-        // just unlocked the wallet and refilled the keypool.
-        qWarning() << "PaymentServer::fetchPaymentACK: Error getting refund key, refund_to not set";
-    }
-
-    int length = payment.ByteSize();
-    netRequest.setHeader(QNetworkRequest::ContentLengthHeader, length);
-    QByteArray serData(length, '\0');
-    if (payment.SerializeToArray(serData.data(), length)) {
-        netManager->post(netRequest, serData);
-    }
-    else {
-        // This should never happen, either.
-        qWarning() << "PaymentServer::fetchPaymentACK: Error serializing payment message";
-    }
-}
-
-void PaymentServer::netRequestFinished(QNetworkReply* reply)
-{
-    reply->deleteLater();
-
-    // BIP70 DoS protection
-    if (!verifySize(reply->size())) {
-        Q_EMIT message(tr("Payment request rejected"),
-            tr("Payment request %1 is too large (%2 bytes, allowed %3 bytes).")
-                .arg(reply->request().url().toString())
-                .arg(reply->size())
-                .arg(BIP70_MAX_PAYMENTREQUEST_SIZE),
-            CClientUIInterface::MSG_ERROR);
-        return;
-    }
-
-    if (reply->error() != QNetworkReply::NoError) {
-        QString msg = tr("Error communicating with %1: %2")
-            .arg(reply->request().url().toString())
-            .arg(reply->errorString());
-
-        qWarning() << "PaymentServer::netRequestFinished: " << msg;
-        Q_EMIT message(tr("Payment request error"), msg, CClientUIInterface::MSG_ERROR);
-        return;
-    }
-
-    QByteArray data = reply->readAll();
-
-    QString requestType = reply->request().attribute(QNetworkRequest::User).toString();
-    if (requestType == BIP70_MESSAGE_PAYMENTREQUEST)
-    {
-        PaymentRequestPlus request;
-        SendCoinsRecipient recipient;
-        if (!request.parse(data))
-        {
-            qWarning() << "PaymentServer::netRequestFinished: Error parsing payment request";
-            Q_EMIT message(tr("Payment request error"),
-                tr("Payment request cannot be parsed!"),
-                CClientUIInterface::MSG_ERROR);
-        }
-        else if (processPaymentRequest(request, recipient))
-            Q_EMIT receivedPaymentRequest(recipient);
-
-        return;
-    }
-    else if (requestType == BIP70_MESSAGE_PAYMENTACK)
-    {
-        payments::PaymentACK paymentACK;
-        if (!paymentACK.ParseFromArray(data.data(), data.size()))
-        {
-            QString msg = tr("Bad response from server %1")
-                .arg(reply->request().url().toString());
-
-            qWarning() << "PaymentServer::netRequestFinished: " << msg;
-            Q_EMIT message(tr("Payment request error"), msg, CClientUIInterface::MSG_ERROR);
-        }
-        else
-        {
-            Q_EMIT receivedPaymentACK(GUIUtil::HtmlEscape(paymentACK.memo()));
-        }
-    }
-}
-
-void PaymentServer::reportSslErrors(QNetworkReply* reply, const QList<QSslError> &errs)
-{
-    Q_UNUSED(reply);
-
-    QString errString;
-    for (const QSslError& err : errs) {
-        qWarning() << "PaymentServer::reportSslErrors: " << err;
-        errString += err.errorString() + "\n";
-    }
-    Q_EMIT message(tr("Network request error"), errString, CClientUIInterface::MSG_ERROR);
-}
-
-void PaymentServer::handlePaymentACK(const QString& paymentACKMsg)
-{
-    // currently we don't further process or store the paymentACK message
-    Q_EMIT message(tr("Payment acknowledged"), paymentACKMsg, CClientUIInterface::ICON_INFORMATION | CClientUIInterface::MODAL);
-}
-
-bool PaymentServer::verifyNetwork(interfaces::Node& node, const payments::PaymentDetails& requestDetails)
-{
-    bool fVerified = requestDetails.network() == node.getNetwork();
-    if (!fVerified) {
-        qWarning() << QString("PaymentServer::%1: Payment request network \"%2\" doesn't match client network \"%3\".")
-            .arg(__func__)
-            .arg(QString::fromStdString(requestDetails.network()))
-            .arg(QString::fromStdString(node.getNetwork()));
-    }
-    return fVerified;
-}
-
-bool PaymentServer::verifyExpired(const payments::PaymentDetails& requestDetails)
-{
-    bool fVerified = (requestDetails.has_expires() && (int64_t)requestDetails.expires() < GetTime());
-    if (fVerified) {
-        const QString requestExpires = QString::fromStdString(FormatISO8601DateTime((int64_t)requestDetails.expires()));
-        qWarning() << QString("PaymentServer::%1: Payment request expired \"%2\".")
-            .arg(__func__)
-            .arg(requestExpires);
-    }
-    return fVerified;
-}
-
-bool PaymentServer::verifySize(qint64 requestSize)
-{
-    bool fVerified = (requestSize <= BIP70_MAX_PAYMENTREQUEST_SIZE);
-    if (!fVerified) {
-        qWarning() << QString("PaymentServer::%1: Payment request too large (%2 bytes, allowed %3 bytes).")
-            .arg(__func__)
-            .arg(requestSize)
-            .arg(BIP70_MAX_PAYMENTREQUEST_SIZE);
-    }
-    return fVerified;
-}
-
-bool PaymentServer::verifyAmount(const CAmount& requestAmount)
-{
-    bool fVerified = MoneyRange(requestAmount);
-    if (!fVerified) {
-        qWarning() << QString("PaymentServer::%1: Payment request amount out of allowed range (%2, allowed 0 - %3).")
-            .arg(__func__)
-            .arg(requestAmount)
-            .arg(MAX_MONEY);
-    }
-    return fVerified;
-}
-
-X509_STORE* PaymentServer::getCertStore()
-{
-    return certStore.get();
-}
-#endif
diff --git a/src/qt/paymentserver.h b/src/qt/paymentserver.h
index 30b5bc3b6d..8b2533508d 100644
--- a/src/qt/paymentserver.h
+++ b/src/qt/paymentserver.h
@@ -36,9 +36,6 @@
 #include <config/bitcoin-config.h>
 #endif
 
-#ifdef ENABLE_BIP70
-#include <qt/paymentrequestplus.h>
-#endif
 #include <qt/walletmodel.h>
 
 #include <QObject>
@@ -50,15 +47,9 @@ QT_BEGIN_NAMESPACE
 class QApplication;
 class QByteArray;
 class QLocalServer;
-class QNetworkAccessManager;
-class QNetworkReply;
-class QSslError;
 class QUrl;
 QT_END_NAMESPACE
 
-// BIP70 max payment request size in bytes (DoS protection)
-static const qint64 BIP70_MAX_PAYMENTREQUEST_SIZE = 50000;
-
 class PaymentServer : public QObject
 {
     Q_OBJECT
@@ -82,27 +73,6 @@ public:
     // OptionsModel is used for getting proxy settings and display unit
     void setOptionsModel(OptionsModel *optionsModel);
 
-#ifdef ENABLE_BIP70
-    // Load root certificate authorities. Pass nullptr (default)
-    // to read from the file specified in the -rootcertificates setting,
-    // or, if that's not set, to use the system default root certificates.
-    // If you pass in a store, you should not X509_STORE_free it: it will be
-    // freed either at exit or when another set of CAs are loaded.
-    static void LoadRootCAs(X509_STORE* store = nullptr);
-
-    // Return certificate store
-    static X509_STORE* getCertStore();
-
-    // Verify that the payment request network matches the client network
-    static bool verifyNetwork(interfaces::Node& node, const payments::PaymentDetails& requestDetails);
-    // Verify if the payment request is expired
-    static bool verifyExpired(const payments::PaymentDetails& requestDetails);
-    // Verify the payment request size is valid as per BIP70
-    static bool verifySize(qint64 requestSize);
-    // Verify the payment request amount is valid
-    static bool verifyAmount(const CAmount& requestAmount);
-#endif
-
 Q_SIGNALS:
     // Fired when a valid payment request is received
     void receivedPaymentRequest(SendCoinsRecipient);
@@ -110,11 +80,6 @@ Q_SIGNALS:
     // Fired when a message should be reported to the user
     void message(const QString &title, const QString &message, unsigned int style);
 
-#ifdef ENABLE_BIP70
-    // Fired when a valid PaymentACK is received
-    void receivedPaymentACK(const QString &paymentACKMsg);
-#endif
-
 public Q_SLOTS:
     // Signal this when the main window's UI is ready
     // to display payment requests to the user
@@ -123,18 +88,8 @@ public Q_SLOTS:
     // Handle an incoming URI, URI with local file scheme or file
     void handleURIOrFile(const QString& s);
 
-#ifdef ENABLE_BIP70
-    // Submit Payment message to a merchant, get back PaymentACK:
-    void fetchPaymentACK(WalletModel* walletModel, const SendCoinsRecipient& recipient, QByteArray transaction);
-#endif
-
 private Q_SLOTS:
     void handleURIConnection();
-#ifdef ENABLE_BIP70
-    void netRequestFinished(QNetworkReply*);
-    void reportSslErrors(QNetworkReply*, const QList<QSslError> &);
-    void handlePaymentACK(const QString& paymentACKMsg);
-#endif
 
 protected:
     // Constructor registers this on the parent QApplication to
@@ -145,16 +100,6 @@ private:
     bool saveURIs;                      // true during startup
     QLocalServer* uriServer;
     OptionsModel *optionsModel;
-
-#ifdef ENABLE_BIP70
-    static bool readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request);
-    bool processPaymentRequest(const PaymentRequestPlus& request, SendCoinsRecipient& recipient);
-    void fetchRequest(const QUrl& url);
-
-    // Setup networking
-    void initNetManager();
-    QNetworkAccessManager* netManager;  // Used to fetch payment requests
-#endif
 };
 
 #endif // BITCOIN_QT_PAYMENTSERVER_H
diff --git a/src/qt/sendcoinsdialog.cpp b/src/qt/sendcoinsdialog.cpp
index 80ea6cd2e6..8edcca684d 100644
--- a/src/qt/sendcoinsdialog.cpp
+++ b/src/qt/sendcoinsdialog.cpp
@@ -291,9 +291,6 @@ void SendCoinsDialog::on_sendButton_clicked()
 
         QString recipientElement;
 
-#ifdef ENABLE_BIP70
-        if (!rcp.paymentRequest.IsInitialized()) // normal payment
-#endif
         {
             if(rcp.label.length() > 0) // label with address
             {
@@ -305,17 +302,6 @@ void SendCoinsDialog::on_sendButton_clicked()
                 recipientElement.append(tr("%1 to %2").arg(amount, address));
             }
         }
-#ifdef ENABLE_BIP70
-        else if(!rcp.authenticatedMerchant.isEmpty()) // authenticated payment request
-        {
-            recipientElement.append(tr("%1 to '%2'").arg(amount, rcp.authenticatedMerchant));
-        }
-        else // unauthenticated payment request
-        {
-            recipientElement.append(tr("%1 to %2").arg(amount, address));
-        }
-#endif
-
         formatted.append(recipientElement);
     }
 
diff --git a/src/qt/sendcoinsentry.cpp b/src/qt/sendcoinsentry.cpp
index 7324d759fb..be417655b4 100644
--- a/src/qt/sendcoinsentry.cpp
+++ b/src/qt/sendcoinsentry.cpp
@@ -137,12 +137,6 @@ bool SendCoinsEntry::validate(interfaces::Node& node)
     // Check input validity
     bool retval = true;
 
-#ifdef ENABLE_BIP70
-    // Skip checks for payment request
-    if (recipient.paymentRequest.IsInitialized())
-        return retval;
-#endif
-
     if (!model->validateAddress(ui->payTo->text()))
     {
         ui->payTo->setValid(false);
@@ -172,13 +166,6 @@ bool SendCoinsEntry::validate(interfaces::Node& node)
 
 SendCoinsRecipient SendCoinsEntry::getValue()
 {
-#ifdef ENABLE_BIP70
-    // Payment request
-    if (recipient.paymentRequest.IsInitialized())
-        return recipient;
-#endif
-
-    // Normal payment
     recipient.address = ui->payTo->text();
     recipient.label = ui->addAsLabel->text();
     recipient.amount = ui->payAmount->value();
@@ -203,29 +190,6 @@ QWidget *SendCoinsEntry::setupTabChain(QWidget *prev)
 void SendCoinsEntry::setValue(const SendCoinsRecipient &value)
 {
     recipient = value;
-
-#ifdef ENABLE_BIP70
-    if (recipient.paymentRequest.IsInitialized()) // payment request
-    {
-        if (recipient.authenticatedMerchant.isEmpty()) // unauthenticated
-        {
-            ui->payTo_is->setText(recipient.address);
-            ui->memoTextLabel_is->setText(recipient.message);
-            ui->payAmount_is->setValue(recipient.amount);
-            ui->payAmount_is->setReadOnly(true);
-            setCurrentWidget(ui->SendCoins_UnauthenticatedPaymentRequest);
-        }
-        else // authenticated
-        {
-            ui->payTo_s->setText(recipient.authenticatedMerchant);
-            ui->memoTextLabel_s->setText(recipient.message);
-            ui->payAmount_s->setValue(recipient.amount);
-            ui->payAmount_s->setReadOnly(true);
-            setCurrentWidget(ui->SendCoins_AuthenticatedPaymentRequest);
-        }
-    }
-    else // normal payment
-#endif
     {
         // message
         ui->messageTextLabel->setText(recipient.message);
diff --git a/src/qt/test/compattests.cpp b/src/qt/test/compattests.cpp
index 6750c543da..cf86a5bc1e 100644
--- a/src/qt/test/compattests.cpp
+++ b/src/qt/test/compattests.cpp
@@ -6,10 +6,6 @@
 #include <config/bitcoin-config.h>
 #endif
 
-#if defined(ENABLE_WALLET) && defined(ENABLE_BIP70)
-#include <qt/paymentrequestplus.h> // this includes protobuf's port.h which defines its own bswap macos
-#endif
-
 #include <qt/test/compattests.h>
 
 #include <compat/byteswap.h>
diff --git a/src/qt/test/paymentrequestdata.h b/src/qt/test/paymentrequestdata.h
deleted file mode 100644
index 7f45d30973..0000000000
--- a/src/qt/test/paymentrequestdata.h
+++ /dev/null
@@ -1,465 +0,0 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef BITCOIN_QT_TEST_PAYMENTREQUESTDATA_H
-#define BITCOIN_QT_TEST_PAYMENTREQUESTDATA_H
-
-//
-// Data for paymentservertests.cpp
-//
-
-// Base64/DER-encoded fake certificate authority certificates.
-// Convert pem to base64/der with:
-// openssl x509 -in cert.pem -inform PEM -outform DER | openssl enc -base64
-
-// Serial Number: 10302349811211485352 (0x8ef94c91b112c0a8)
-// Issuer: CN=PaymentRequest Test CA
-// Subject: CN=PaymentRequest Test CA
-// Not Valid After : Dec  8 16:37:24 2022 GMT
-//
-const char* caCert1_BASE64 =
-"\
-MIIB0DCCATmgAwIBAgIJAI75TJGxEsCoMA0GCSqGSIb3DQEBCwUAMCExHzAdBgNV\
-BAMTFlBheW1lbnRSZXF1ZXN0IFRlc3QgQ0EwHhcNMTIxMjEwMTYzNzI0WhcNMjIx\
-MjA4MTYzNzI0WjAhMR8wHQYDVQQDExZQYXltZW50UmVxdWVzdCBUZXN0IENBMIGf\
-MA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCvua59nX9radoqDYyplcns5qdVDTN1\
-7tmcGixmMYOYU3UYMU55VSsJs0dWKnMm3COQDY+N63c0XSbRqarBcsLTkaNASuPX\
-FCv1VWuEKSyy5xe4zeoDU7CVSzlxtQD9wbZW/s3ISjgaXBpwn6eVmntb0JwYxxPc\
-M1u/hrMD8BDbSQIDAQABoxAwDjAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEBCwUA\
-A4GBADSaRgK5xe47XxycXBhHhr0Wgl4pAsFsufqA9aB9r8KNEHJ0yUvvbD/jaJJM\
-RtQcf0AJ9olzUMY4syehxbzUJP6aeXhZEYiMvdvcv9D55clq6+WLLlNT3jBgAaVn\
-p3waRjPD4bUX3nv+ojz5s4puw7Qq5QUZlhGsMzPvwDGCmZkL\
-";
-
-// Serial Number: f0:da:97:e4:38:d7:64:16
-// Issuer: CN=PaymentRequest Test CA
-// Subject: CN=PaymentRequest Test CA
-// Not Valid After : Jan  8 18:21:06 2025 GMT
-//
-const char* caCert2_BASE64 =
-"\
-MIIC1TCCAb2gAwIBAgIJAPDal+Q412QWMA0GCSqGSIb3DQEBCwUAMCExHzAdBgNV\
-BAMMFlBheW1lbnRSZXF1ZXN0IFRlc3QgQ0EwHhcNMTUwMTExMTgyMTA2WhcNMjUw\
-MTA4MTgyMTA2WjAhMR8wHQYDVQQDDBZQYXltZW50UmVxdWVzdCBUZXN0IENBMIIB\
-IjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1S9wVLfTplJuT/1OaaBgl/Mb\
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-xDw0kuNehfz1ycaGedlFFtFHTNXqLyIUF3dlwHhQwaomM6RXoJmxLny5BhYHEcmk\
-yWwr3Cdjd9gAZpblugVJB9C1e40uyL8ao4PHdLzOqO27iSe6riP8SwwisJZEbMaz\
-AZpgNEEMbIXPJEFvm5HTRXSMtQCOTSZYMFF0M2yrtmlECnz7hWP19b9bcoDzZQB4\
-ylIsFG/7q2jV7MC/e2STZv+niJiHL08RUdoFpAgzaxMgqj63C7B55HgNDNHJYQID\
-AQABoxAwDjAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEBCwUAA4IBAQBGejPxLxj9\
-+crv6gUeEBMZPiUx7pUgcI22Wm5yymP96B4fwI3Y0DBehq20d76vbWGPN17Z6pH3\
-ge7PVY1SYqXtS6hXTo4olCm/BZADli+2Bs2xCiaa+Ltve4ufVej+bKJXN/YnrhvO\
-Kq+klQkuuHywU+GJV/NQeBqToIrSOBgi477NgLFCCCmmx2QWsxHoCFGfuRCBVseT\
-z2k/tMuALCDXGeZBRPTsGHu1y4cj84swAeoDK5QSQcI+Ub7GKc+zkoj02sdDLiMo\
-3wokYPcIy47oclhmb4xubHc+y7nF610yZBoC/zgbhbawnZ65hDDWkdQ/SVAnWZD7\
-9PFfmNnYPTQH\
-";
-
-//
-// This payment request validates directly against the
-// caCert1 certificate authority.
-//
-const char* paymentrequest1_cert1_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrxAwruAzCCAeowggFToAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAxMWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xMjEyMTAx\
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-cmcxJjAkBgNVBAoMHVBheW1lbnQgUmVxdWVzdCBUZXN0IE1lcmNoYW50MIGfMA0G\
-CSqGSIb3DQEBAQUAA4GNADCBiQKBgQDHkMy8W1u6HsWlSqdWTmMKf54gICxNfxbY\
-+rcMtAftr62hCYx2d2QiSRd1pCUzmo12IiSX3WxSHwaTnT3MFD6jRx6+zM6XdGar\
-I2zpYle11ANzu4gAthN17uRQHV2O5QxVtzNaMdKeJLXT2L9tfEdyL++9ZUqoQmdA\
-YG9ix330hQIDAQABoxAwDjAMBgNVHRMEBTADAQH/MA0GCSqGSIb3DQEBCwUAA4GB\
-AIkyO99KC68bi9PFRyQQ7nvn5GlQEb3Ca1bRG5+AKN9N5vc8rZ9G2hejtM8wEXni\
-eGBP+chVMsbTPEHKLrwREn7IvcyCcbAStaklPC3w0B/2idQSHskb6P3X13OR2bTH\
-a2+6wuhsOZRUrVNr24rM95DKx/eCC6JN1VW+qRPU6fqzIjQSHwiw2wYSGXapFJVg\
-igPI+6XpExtNLO/i1WFV8ZmoiKwYsuHFiwUqC1VuaXRUZXN0T25lKoABS0j59iMU\
-Uc9MdIfwsO1BskIET0eJSGNZ7eXb9N62u+qf831PMpEHkmlGpk8rHy92nPcgua/U\
-Yt8oZMn3QaTZ5A6HjJbc3A73eLylp1a0SwCl+KDMEvDQhqMn1jAVu2v92AH3uB7n\
-SiWVbw0tX/68iSQEGGfh9n6ee/8Myb3ICdw=\
-";
-
-//
-// Signed, but expired, merchant cert in the request
-//
-const char* paymentrequest2_cert1_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrsAwrpAzCCAeUwggFOoAMCAQICAQMwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAxMWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xMzAyMjMy\
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-tdQDc7uIALYTde7kUB1djuUMVbczWjHSniS109i/bXxHci/vvWVKqEJnQGBvYsd9\
-9IUCAwEAAaMQMA4wDAYDVR0TBAUwAwEB/zANBgkqhkiG9w0BAQsFAAOBgQAaU137\
-j53rvSjlmYZpZ4RWTP7EdD6fl5ZxBeXHytN6DQL33H0eD7OFHt+ofc7E6D7keubl\
-UfCu+jOvt/MvvPUmtCI9yXZ0dNC4sjyETv+wQpxO0UNZwOM4uegdCzlo6Bi3pD4/\
-KKLdMkWuUfuPBmoammny74lZaOVr5deKXztTuCI0Eh8IsNsGEhl2qRSVYIoDyPul\
-6RMbTSzv4tVhVfGZqIisGLLhxYsFKgtVbml0VGVzdFR3byqAAXHuo4nZEPniLpkd\
-y30TkwBxVgprWJ18a9z/7Py35Qss/JMbOXbnBhJtmJCdIowHRI0aa+zqt3KKKAXi\
-mm+V4seMgxTcxMS+eDDkiTcB/RtWWSyRcS2ANjFeY0T4SLMwiCL9qWPi03hr8j96\
-tejrSPOBNSJ3Mi/q5u2Yl4gJZY2b\
-";
-
-//
-// 10-long certificate chain, all intermediates valid
-//
-const char* paymentrequest3_cert1_BASE64 =
-"\
-Egt4NTA5K3NoYTI1Nhq8JAr/AzCCAfswggFkoAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwPzEUMBIGA1UEAwwLdGVzdGNhOC5vcmcxJzAlBgNVBAoMHlBheW1lbnQgUmVx\
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-664NuWA9WtsK7QCFrK2K95PnVCRmWl0=\
-";
-
-//
-// Long certificate chain, with an expired certificate in the middle
-//
-const char* paymentrequest4_cert1_BASE64 =
-"\
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-FAyZblLik9A7ZvF+UsjeFQiHB5wzWQvbqk5wQ4yabHIXoYv/E0q+eQ==\
-";
-
-//
-// Validly signed, but by a CA not in our root CA list
-//
-const char* paymentrequest5_cert1_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrxAwruAzCCAeowggFToAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAxMWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xMzA0MTkx\
-NzIwMDZaFw0yMzA0MTcxNzIwMDZaMEMxGTAXBgNVBAMMEHRlc3RtZXJjaGFudC5v\
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-CSqGSIb3DQEBAQUAA4GNADCBiQKBgQDhV6Yn47aEEmbl50YLvXoqGEJA51I/40wr\
-Z6VQGdXYaRqYktagrWDlgYY9h0JQ1bQhm8HgW7ju0R4NaDTXUqxg4HjprF0z3Mfm\
-/6mmebkLOOptfkVD7ceAteNI7cyuqWGIAZA7D9mV97mXoCAtTlBUycvkmoiClCCS\
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-5/4wL4ClPRPVnOHgij0bEg+y0tGESqmF1rfOfXDszlo2U92wCxS07kq79YAZJ1Zo\
-XYh860/Q4wvc7lfiTe+dXBzPKAKhMy91yETY\
-";
-
-//
-// Contains a testnet paytoaddress, so payment request network doesn't match client network
-//
-const char* paymentrequest1_cert2_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrQBArNBDCCAkkwggExoAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAwwWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xNTAxMTEx\
-ODIxMDhaFw0yNTAxMDgxODIxMDhaMCExHzAdBgNVBAMMFlBheW1lbnRSZXF1ZXN0\
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-KoZIhvcNAQELBQADggEBABUJpl3QCqsoDSxAsQdV6zKT4VGV76AzoGj7etQsQY+r\
-+S26VfWh/fMobEzuxFChr0USgLJ6FoK78hAtoZvt1lrye9yqFv/ig3WLWsJKWHHb\
-3RT6oR03CIwZXFSUasi08QDVLxafwsU5OMcPLucF3a1lRL1ccYrNgVCCx1+X7Bos\
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-yyKLagc4owyXBZYkQmkeHWCNqnuRmO5vUsfVb0UUrkD64o7Th/NjwooA7SCiUXl6\
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-Ehl2qRQErGqUUwSsaMpDvWIaGnJGNQqi8oisGNeMy6UFKgxKdXN0IFRlc3Rpbmcq\
-gAFwThsozZxkZxzCn4R8WxNiLFV6m0ye9fEtSbolfaW+EjBMpO03lr/dwNnrclhg\
-ew+A05xfZztrAt16XKEY7qKJ/eY2nLd0fVAIu/nIt+7/VYVXT83zLrWc150aRS7W\
-AdJbL3JOJLs6Eyp5zrPbfI8faRttFAdONKDrJgIpuW1E3g==\
-";
-
-//
-// Expired payment request (expires is set to 1 = 1970-01-01 00:00:01)
-//
-const char* paymentrequest2_cert2_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrQBArNBDCCAkkwggExoAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAwwWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xNTAxMTEx\
-ODIxMDhaFw0yNTAxMDgxODIxMDhaMCExHzAdBgNVBAMMFlBheW1lbnRSZXF1ZXN0\
-IFRlc3QgQ0EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMsZqzkzeBGo+i2N\
-mUak3Ciodr1V7S062VOy7N0OQYNDQHYkgDFAUET7cEb5VJaHPv5m3ppTBpU9xBcf\
-wbHHUt4VjA+mhRmYrl1khjvZM+X8kEqvWn20BtcM9R6r0yIYec8UERDDHBleL/P8\
-RkxEnVLjYTV9zigCXfMsgYb3EQShAgMBAAGjEDAOMAwGA1UdEwQFMAMBAf8wDQYJ\
-KoZIhvcNAQELBQADggEBABUJpl3QCqsoDSxAsQdV6zKT4VGV76AzoGj7etQsQY+r\
-+S26VfWh/fMobEzuxFChr0USgLJ6FoK78hAtoZvt1lrye9yqFv/ig3WLWsJKWHHb\
-3RT6oR03CIwZXFSUasi08QDVLxafwsU5OMcPLucF3a1lRL1ccYrNgVCCx1+X7Bos\
-tIgDGRQQ4AyoHTcfVd2hEGeUv7k14mOxFsAp6851yosHq9Q2kwmdH+rHEJbjof87\
-yyKLagc4owyXBZYkQmkeHWCNqnuRmO5vUsfVb0UUrkD64o7Th/NjwooA7SCiUXl6\
-dfygT1b7ggpx7GC+sP2DsIM47IAZ55drjqX5u2f+Ba0iQgoEdGVzdBIgCICt4gQS\
-GXapFASsapRTBKxoykO9YhoackY1CqLyiKwYiNLUpQUgASoQVGVzdGluZyB0ZXN0\
-bmV0ISqAATXq9A5nmJgtmee/bQTeHeif4w1YYFPBlKghwx6qbVgXTWnwBJtOQhhV\
-sZdzbTl95ENR7/Y7VJupW9kDWobCK7zUUhLAzUlwmLlcx6itHw8LTUF5HK+AwsZm\
-Zs85lISGvOS0NZW/ENa6l+oQRnL87oqVZr/EDGiuqjz6T0ThQi0l\
-";
-
-//
-// Unexpired payment request (expires is set to 0x7FFFFFFFFFFFFFFF = max. int64_t)
-//
-const char* paymentrequest3_cert2_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrQBArNBDCCAkkwggExoAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAwwWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xNTAxMTEx\
-ODIxMDhaFw0yNTAxMDgxODIxMDhaMCExHzAdBgNVBAMMFlBheW1lbnRSZXF1ZXN0\
-IFRlc3QgQ0EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMsZqzkzeBGo+i2N\
-mUak3Ciodr1V7S062VOy7N0OQYNDQHYkgDFAUET7cEb5VJaHPv5m3ppTBpU9xBcf\
-wbHHUt4VjA+mhRmYrl1khjvZM+X8kEqvWn20BtcM9R6r0yIYec8UERDDHBleL/P8\
-RkxEnVLjYTV9zigCXfMsgYb3EQShAgMBAAGjEDAOMAwGA1UdEwQFMAMBAf8wDQYJ\
-KoZIhvcNAQELBQADggEBABUJpl3QCqsoDSxAsQdV6zKT4VGV76AzoGj7etQsQY+r\
-+S26VfWh/fMobEzuxFChr0USgLJ6FoK78hAtoZvt1lrye9yqFv/ig3WLWsJKWHHb\
-3RT6oR03CIwZXFSUasi08QDVLxafwsU5OMcPLucF3a1lRL1ccYrNgVCCx1+X7Bos\
-tIgDGRQQ4AyoHTcfVd2hEGeUv7k14mOxFsAp6851yosHq9Q2kwmdH+rHEJbjof87\
-yyKLagc4owyXBZYkQmkeHWCNqnuRmO5vUsfVb0UUrkD64o7Th/NjwooA7SCiUXl6\
-dfygT1b7ggpx7GC+sP2DsIM47IAZ55drjqX5u2f+Ba0iSgoEdGVzdBIgCICt4gQS\
-GXapFASsapRTBKxoykO9YhoackY1CqLyiKwYyNfZpQUg//////////9/KhBUZXN0\
-aW5nIHRlc3RuZXQhKoABNwi8WnMW4aMvbmvorTiiWJLFhofLFnsoWCJnj3rWLnLh\
-n3w6q/fZ26p50ERL/noxdTUfeFsKnlECkUu/fOcOrqyYDiwvxI0SZ034DleVyFU1\
-Z3T+X0zcL8oe7bX01Yf+s2V+5JXQXarKnKBrZCGgv2ARjFNSZe7E7vGg5K4Q6Q8=\
-";
-
-//
-// Unexpired payment request (expires is set to 0x8000000000000000 > max. int64_t, allowed uint64)
-//
-const char* paymentrequest4_cert2_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrQBArNBDCCAkkwggExoAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAwwWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xNTAxMTEx\
-ODIxMDhaFw0yNTAxMDgxODIxMDhaMCExHzAdBgNVBAMMFlBheW1lbnRSZXF1ZXN0\
-IFRlc3QgQ0EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMsZqzkzeBGo+i2N\
-mUak3Ciodr1V7S062VOy7N0OQYNDQHYkgDFAUET7cEb5VJaHPv5m3ppTBpU9xBcf\
-wbHHUt4VjA+mhRmYrl1khjvZM+X8kEqvWn20BtcM9R6r0yIYec8UERDDHBleL/P8\
-RkxEnVLjYTV9zigCXfMsgYb3EQShAgMBAAGjEDAOMAwGA1UdEwQFMAMBAf8wDQYJ\
-KoZIhvcNAQELBQADggEBABUJpl3QCqsoDSxAsQdV6zKT4VGV76AzoGj7etQsQY+r\
-+S26VfWh/fMobEzuxFChr0USgLJ6FoK78hAtoZvt1lrye9yqFv/ig3WLWsJKWHHb\
-3RT6oR03CIwZXFSUasi08QDVLxafwsU5OMcPLucF3a1lRL1ccYrNgVCCx1+X7Bos\
-tIgDGRQQ4AyoHTcfVd2hEGeUv7k14mOxFsAp6851yosHq9Q2kwmdH+rHEJbjof87\
-yyKLagc4owyXBZYkQmkeHWCNqnuRmO5vUsfVb0UUrkD64o7Th/NjwooA7SCiUXl6\
-dfygT1b7ggpx7GC+sP2DsIM47IAZ55drjqX5u2f+Ba0iSwoEdGVzdBIgCICt4gQS\
-GXapFASsapRTBKxoykO9YhoackY1CqLyiKwYt+HZpQUggICAgICAgICAASoQVGVz\
-dGluZyB0ZXN0bmV0ISqAAXSQG8+GFA18VaKarlYrOz293rNMIub0swKGcQm8jAGX\
-HSLaRgHfUDeEPr4hydy4dtfu59KNwe2xsHOHu/SpO4L8SrA4Dm9A7SlNBVWdcLbw\
-d2hj739GDLz0b5KuJ2SG6VknMRQM976w/m2qlq0ccVGaaZ2zMIGfpzL3p6adwx/5\
-";
-
-//
-// Payment request with amount overflow (amount is set to 21000001 BTC)
-//
-const char* paymentrequest5_cert2_BASE64 =
-"\
-Egt4NTA5K3NoYTI1NhrQBArNBDCCAkkwggExoAMCAQICAQEwDQYJKoZIhvcNAQEL\
-BQAwITEfMB0GA1UEAwwWUGF5bWVudFJlcXVlc3QgVGVzdCBDQTAeFw0xNTAxMTEx\
-ODIxMDhaFw0yNTAxMDgxODIxMDhaMCExHzAdBgNVBAMMFlBheW1lbnRSZXF1ZXN0\
-IFRlc3QgQ0EwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAMsZqzkzeBGo+i2N\
-mUak3Ciodr1V7S062VOy7N0OQYNDQHYkgDFAUET7cEb5VJaHPv5m3ppTBpU9xBcf\
-wbHHUt4VjA+mhRmYrl1khjvZM+X8kEqvWn20BtcM9R6r0yIYec8UERDDHBleL/P8\
-RkxEnVLjYTV9zigCXfMsgYb3EQShAgMBAAGjEDAOMAwGA1UdEwQFMAMBAf8wDQYJ\
-KoZIhvcNAQELBQADggEBABUJpl3QCqsoDSxAsQdV6zKT4VGV76AzoGj7etQsQY+r\
-+S26VfWh/fMobEzuxFChr0USgLJ6FoK78hAtoZvt1lrye9yqFv/ig3WLWsJKWHHb\
-3RT6oR03CIwZXFSUasi08QDVLxafwsU5OMcPLucF3a1lRL1ccYrNgVCCx1+X7Bos\
-tIgDGRQQ4AyoHTcfVd2hEGeUv7k14mOxFsAp6851yosHq9Q2kwmdH+rHEJbjof87\
-yyKLagc4owyXBZYkQmkeHWCNqnuRmO5vUsfVb0UUrkD64o7Th/NjwooA7SCiUXl6\
-dfygT1b7ggpx7GC+sP2DsIM47IAZ55drjqX5u2f+Ba0iTAoEdGVzdBIkCIDC9P+F\
-vt0DEhl2qRQErGqUUwSsaMpDvWIaGnJGNQqi8oisGLzcrKYFKhhUZXN0aW5nIGFt\
-b3VudCBvdmVyZmxvdyEqgAG8S7WEDUC6tCL6q2CTBjop/AitgEy31RL9IqYruytR\
-iEBFUrBDJZU+UEezGwr7/zoECjo5ZY3PmtZcM2sILNjyweJF6XVzGqTxUw6pN6sW\
-XR2T3Gy2LzRvhVA25QgGqpz0/juS2BtmNbsZPkN9gMMwKimgzc+PuCzmEKwPK9cQ\
-YQ==\
-";
-
-#endif // BITCOIN_QT_TEST_PAYMENTREQUESTDATA_H
diff --git a/src/qt/test/paymentservertests.cpp b/src/qt/test/paymentservertests.cpp
deleted file mode 100644
index ef0808054d..0000000000
--- a/src/qt/test/paymentservertests.cpp
+++ /dev/null
@@ -1,215 +0,0 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#include <qt/test/paymentservertests.h>
-
-#include <qt/optionsmodel.h>
-#include <qt/test/paymentrequestdata.h>
-
-#include <amount.h>
-#include <interfaces/node.h>
-#include <random.h>
-#include <script/script.h>
-#include <script/standard.h>
-#include <test/setup_common.h>
-#include <util/strencodings.h>
-
-#include <openssl/ssl.h>
-#include <openssl/x509.h>
-#include <openssl/x509_vfy.h>
-
-#include <QFileOpenEvent>
-#include <QTemporaryFile>
-
-X509 *parse_b64der_cert(const char* cert_data)
-{
-    std::vector<unsigned char> data = DecodeBase64(cert_data);
-    assert(data.size() > 0);
-    const unsigned char* dptr = data.data();
-    X509 *cert = d2i_X509(nullptr, &dptr, data.size());
-    assert(cert);
-    return cert;
-}
-
-//
-// Test payment request handling
-//
-
-static SendCoinsRecipient handleRequest(PaymentServer* server, std::vector<unsigned char>& data)
-{
-    RecipientCatcher sigCatcher;
-    QObject::connect(server, &PaymentServer::receivedPaymentRequest,
-        &sigCatcher, &RecipientCatcher::getRecipient);
-
-    // Write data to a temp file:
-    QTemporaryFile f;
-    f.open();
-    f.write((const char*)data.data(), data.size());
-    f.close();
-
-    // Create a QObject, install event filter from PaymentServer
-    // and send a file open event to the object
-    QObject object;
-    object.installEventFilter(server);
-    QFileOpenEvent event(f.fileName());
-    // If sending the event fails, this will cause sigCatcher to be empty,
-    // which will lead to a test failure anyway.
-    QCoreApplication::sendEvent(&object, &event);
-
-    QObject::disconnect(server, &PaymentServer::receivedPaymentRequest,
-        &sigCatcher, &RecipientCatcher::getRecipient);
-
-    // Return results from sigCatcher
-    return sigCatcher.recipient;
-}
-
-void PaymentServerTests::paymentServerTests()
-{
-    SSL_library_init();
-    BasicTestingSetup testing_setup(CBaseChainParams::MAIN);
-    auto node = interfaces::MakeNode();
-    OptionsModel optionsModel(*node);
-    PaymentServer* server = new PaymentServer(nullptr, false);
-    X509_STORE* caStore = X509_STORE_new();
-    X509_STORE_add_cert(caStore, parse_b64der_cert(caCert1_BASE64));
-    PaymentServer::LoadRootCAs(caStore);
-    server->setOptionsModel(&optionsModel);
-    server->uiReady();
-
-    std::vector<unsigned char> data;
-    SendCoinsRecipient r;
-    QString merchant;
-
-    // Now feed PaymentRequests to server, and observe signals it produces
-
-    // This payment request validates directly against the
-    // caCert1 certificate authority:
-    data = DecodeBase64(paymentrequest1_cert1_BASE64);
-    r = handleRequest(server, data);
-    r.paymentRequest.getMerchant(caStore, merchant);
-    QCOMPARE(merchant, QString("testmerchant.org"));
-
-    // Signed, but expired, merchant cert in the request:
-    data = DecodeBase64(paymentrequest2_cert1_BASE64);
-    r = handleRequest(server, data);
-    r.paymentRequest.getMerchant(caStore, merchant);
-    QCOMPARE(merchant, QString(""));
-
-    // 10-long certificate chain, all intermediates valid:
-    data = DecodeBase64(paymentrequest3_cert1_BASE64);
-    r = handleRequest(server, data);
-    r.paymentRequest.getMerchant(caStore, merchant);
-    QCOMPARE(merchant, QString("testmerchant8.org"));
-
-    // Long certificate chain, with an expired certificate in the middle:
-    data = DecodeBase64(paymentrequest4_cert1_BASE64);
-    r = handleRequest(server, data);
-    r.paymentRequest.getMerchant(caStore, merchant);
-    QCOMPARE(merchant, QString(""));
-
-    // Validly signed, but by a CA not in our root CA list:
-    data = DecodeBase64(paymentrequest5_cert1_BASE64);
-    r = handleRequest(server, data);
-    r.paymentRequest.getMerchant(caStore, merchant);
-    QCOMPARE(merchant, QString(""));
-
-    // Try again with no root CA's, verifiedMerchant should be empty:
-    caStore = X509_STORE_new();
-    PaymentServer::LoadRootCAs(caStore);
-    data = DecodeBase64(paymentrequest1_cert1_BASE64);
-    r = handleRequest(server, data);
-    r.paymentRequest.getMerchant(caStore, merchant);
-    QCOMPARE(merchant, QString(""));
-
-    // Load second root certificate
-    caStore = X509_STORE_new();
-    X509_STORE_add_cert(caStore, parse_b64der_cert(caCert2_BASE64));
-    PaymentServer::LoadRootCAs(caStore);
-
-    QByteArray byteArray;
-
-    // For the tests below we just need the payment request data from
-    // paymentrequestdata.h parsed + stored in r.paymentRequest.
-    //
-    // These tests require us to bypass the following normal client execution flow
-    // shown below to be able to explicitly just trigger a certain condition!
-    //
-    // handleRequest()
-    // -> PaymentServer::eventFilter()
-    //   -> PaymentServer::handleURIOrFile()
-    //     -> PaymentServer::readPaymentRequestFromFile()
-    //       -> PaymentServer::processPaymentRequest()
-
-    // Contains a testnet paytoaddress, so payment request network doesn't match client network:
-    data = DecodeBase64(paymentrequest1_cert2_BASE64);
-    byteArray = QByteArray((const char*)data.data(), data.size());
-    r.paymentRequest.parse(byteArray);
-    // Ensure the request is initialized, because network "main" is default, even for
-    // uninitialized payment requests and that will fail our test here.
-    QVERIFY(r.paymentRequest.IsInitialized());
-    QCOMPARE(PaymentServer::verifyNetwork(*node, r.paymentRequest.getDetails()), false);
-
-    // Expired payment request (expires is set to 1 = 1970-01-01 00:00:01):
-    data = DecodeBase64(paymentrequest2_cert2_BASE64);
-    byteArray = QByteArray((const char*)data.data(), data.size());
-    r.paymentRequest.parse(byteArray);
-    // Ensure the request is initialized
-    QVERIFY(r.paymentRequest.IsInitialized());
-    // compares 1 < GetTime() == false (treated as expired payment request)
-    QCOMPARE(PaymentServer::verifyExpired(r.paymentRequest.getDetails()), true);
-
-    // Unexpired payment request (expires is set to 0x7FFFFFFFFFFFFFFF = max. int64_t):
-    // 9223372036854775807 (uint64), 9223372036854775807 (int64_t) and -1 (int32_t)
-    // -1 is 1969-12-31 23:59:59 (for a 32 bit time values)
-    data = DecodeBase64(paymentrequest3_cert2_BASE64);
-    byteArray = QByteArray((const char*)data.data(), data.size());
-    r.paymentRequest.parse(byteArray);
-    // Ensure the request is initialized
-    QVERIFY(r.paymentRequest.IsInitialized());
-    // compares 9223372036854775807 < GetTime() == false (treated as unexpired payment request)
-    QCOMPARE(PaymentServer::verifyExpired(r.paymentRequest.getDetails()), false);
-
-    // Unexpired payment request (expires is set to 0x8000000000000000 > max. int64_t, allowed uint64):
-    // 9223372036854775808 (uint64), -9223372036854775808 (int64_t) and 0 (int32_t)
-    // 0 is 1970-01-01 00:00:00 (for a 32 bit time values)
-    data = DecodeBase64(paymentrequest4_cert2_BASE64);
-    byteArray = QByteArray((const char*)data.data(), data.size());
-    r.paymentRequest.parse(byteArray);
-    // Ensure the request is initialized
-    QVERIFY(r.paymentRequest.IsInitialized());
-    // compares -9223372036854775808 < GetTime() == true (treated as expired payment request)
-    QCOMPARE(PaymentServer::verifyExpired(r.paymentRequest.getDetails()), true);
-
-    // Test BIP70 DoS protection:
-    auto randdata = FastRandomContext().randbytes(BIP70_MAX_PAYMENTREQUEST_SIZE + 1);
-
-    // Write data to a temp file:
-    QTemporaryFile tempFile;
-    tempFile.open();
-    tempFile.write((const char*)randdata.data(), randdata.size());
-    tempFile.close();
-    // compares 50001 <= BIP70_MAX_PAYMENTREQUEST_SIZE == false
-    QCOMPARE(PaymentServer::verifySize(tempFile.size()), false);
-
-    // Payment request with amount overflow (amount is set to 21000001 BTC):
-    data = DecodeBase64(paymentrequest5_cert2_BASE64);
-    byteArray = QByteArray((const char*)data.data(), data.size());
-    r.paymentRequest.parse(byteArray);
-    // Ensure the request is initialized
-    QVERIFY(r.paymentRequest.IsInitialized());
-    // Extract address and amount from the request
-    QList<std::pair<CScript, CAmount> > sendingTos = r.paymentRequest.getPayTo();
-    for (const std::pair<CScript, CAmount>& sendingTo : sendingTos) {
-        CTxDestination dest;
-        if (ExtractDestination(sendingTo.first, dest))
-            QCOMPARE(PaymentServer::verifyAmount(sendingTo.second), false);
-    }
-
-    delete server;
-}
-
-void RecipientCatcher::getRecipient(const SendCoinsRecipient& r)
-{
-    recipient = r;
-}
diff --git a/src/qt/test/paymentservertests.h b/src/qt/test/paymentservertests.h
deleted file mode 100644
index 7ef7a0a641..0000000000
--- a/src/qt/test/paymentservertests.h
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright (c) 2009-2018 The Bitcoin Core developers
-// Distributed under the MIT software license, see the accompanying
-// file COPYING or http://www.opensource.org/licenses/mit-license.php.
-
-#ifndef BITCOIN_QT_TEST_PAYMENTSERVERTESTS_H
-#define BITCOIN_QT_TEST_PAYMENTSERVERTESTS_H
-
-#include <qt/paymentserver.h>
-
-#include <QObject>
-#include <QTest>
-
-class PaymentServerTests : public QObject
-{
-    Q_OBJECT
-
-private Q_SLOTS:
-    void paymentServerTests();
-};
-
-// Dummy class to receive paymentserver signals.
-// If SendCoinsRecipient was a proper QObject, then
-// we could use QSignalSpy... but it's not.
-class RecipientCatcher : public QObject
-{
-    Q_OBJECT
-
-public Q_SLOTS:
-    void getRecipient(const SendCoinsRecipient& r);
-
-public:
-    SendCoinsRecipient recipient;
-};
-
-#endif // BITCOIN_QT_TEST_PAYMENTSERVERTESTS_H
diff --git a/src/qt/test/test_main.cpp b/src/qt/test/test_main.cpp
index c39266a397..f272627f96 100644
--- a/src/qt/test/test_main.cpp
+++ b/src/qt/test/test_main.cpp
@@ -16,9 +16,6 @@
 
 #ifdef ENABLE_WALLET
 #include <qt/test/addressbooktests.h>
-#ifdef ENABLE_BIP70
-#include <qt/test/paymentservertests.h>
-#endif // ENABLE_BIP70
 #include <qt/test/wallettests.h>
 #endif // ENABLE_WALLET
 
@@ -79,12 +76,6 @@ int main(int argc, char *argv[])
     if (QTest::qExec(&test1) != 0) {
         fInvalid = true;
     }
-#if defined(ENABLE_WALLET) && defined(ENABLE_BIP70)
-    PaymentServerTests test2;
-    if (QTest::qExec(&test2) != 0) {
-        fInvalid = true;
-    }
-#endif
     RPCNestedTests test3;
     if (QTest::qExec(&test3) != 0) {
         fInvalid = true;
diff --git a/src/qt/transactiondesc.cpp b/src/qt/transactiondesc.cpp
index 44ce5265cd..318b0756c7 100644
--- a/src/qt/transactiondesc.cpp
+++ b/src/qt/transactiondesc.cpp
@@ -48,7 +48,6 @@ QString TransactionDesc::FormatTxStatus(const interfaces::WalletTx& wtx, const i
     }
 }
 
-#ifndef ENABLE_BIP70
 // Takes an encoded PaymentRequest as a string and tries to find the Common Name of the X.509 certificate
 // used to sign the PaymentRequest.
 bool GetPaymentRequestMerchant(const std::string& pr, QString& merchant)
@@ -76,7 +75,6 @@ bool GetPaymentRequestMerchant(const std::string& pr, QString& merchant)
     }
     return false;
 }
-#endif
 
 QString TransactionDesc::toHTML(interfaces::Node& node, interfaces::Wallet& wallet, TransactionRecord *rec, int unit)
 {
@@ -294,19 +292,11 @@ QString TransactionDesc::toHTML(interfaces::Node& node, interfaces::Wallet& wall
         if (r.first == "PaymentRequest")
         {
             QString merchant;
-#ifdef ENABLE_BIP70
-            PaymentRequestPlus req;
-            req.parse(QByteArray::fromRawData(r.second.data(), r.second.size()));
-            if (!req.getMerchant(PaymentServer::getCertStore(), merchant)) {
-                merchant.clear();
-            }
-#else
             if (!GetPaymentRequestMerchant(r.second, merchant)) {
                 merchant.clear();
             } else {
                 merchant += tr(" (Certificate was not verified)");
             }
-#endif
             if (!merchant.isNull()) {
                 strHTML += "<b>" + tr("Merchant") + ":</b> " + GUIUtil::HtmlEscape(merchant) + "<br>";
             }
diff --git a/src/qt/utilitydialog.cpp b/src/qt/utilitydialog.cpp
index 6509a701f3..095c98d26f 100644
--- a/src/qt/utilitydialog.cpp
+++ b/src/qt/utilitydialog.cpp
@@ -11,9 +11,6 @@
 #include <qt/forms/ui_helpmessagedialog.h>
 
 #include <qt/bitcoingui.h>
-#ifdef ENABLE_BIP70
-#include <qt/paymentrequestplus.h>
-#endif
 
 #include <clientversion.h>
 #include <init.h>
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index 5bc72125f6..08ea1c2409 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -143,31 +143,6 @@ WalletModel::SendCoinsReturn WalletModel::prepareTransaction(WalletModelTransact
     {
         if (rcp.fSubtractFeeFromAmount)
             fSubtractFeeFromAmount = true;
-
-#ifdef ENABLE_BIP70
-        if (rcp.paymentRequest.IsInitialized())
-        {   // PaymentRequest...
-            CAmount subtotal = 0;
-            const payments::PaymentDetails& details = rcp.paymentRequest.getDetails();
-            for (int i = 0; i < details.outputs_size(); i++)
-            {
-                const payments::Output& out = details.outputs(i);
-                if (out.amount() <= 0) continue;
-                subtotal += out.amount();
-                const unsigned char* scriptStr = (const unsigned char*)out.script().data();
-                CScript scriptPubKey(scriptStr, scriptStr+out.script().size());
-                CAmount nAmount = out.amount();
-                CRecipient recipient = {scriptPubKey, nAmount, rcp.fSubtractFeeFromAmount};
-                vecSend.push_back(recipient);
-            }
-            if (subtotal <= 0)
-            {
-                return InvalidAmount;
-            }
-            total += subtotal;
-        }
-        else
-#endif
         {   // User-entered bitcoin address / amount:
             if(!validateAddress(rcp.address))
             {
@@ -240,21 +215,6 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
         std::vector<std::pair<std::string, std::string>> vOrderForm;
         for (const SendCoinsRecipient &rcp : transaction.getRecipients())
         {
-#ifdef ENABLE_BIP70
-            if (rcp.paymentRequest.IsInitialized())
-            {
-                // Make sure any payment requests involved are still valid.
-                if (PaymentServer::verifyExpired(rcp.paymentRequest.getDetails())) {
-                    return PaymentRequestExpired;
-                }
-
-                // Store PaymentRequests in wtx.vOrderForm in wallet.
-                std::string value;
-                rcp.paymentRequest.SerializeToString(&value);
-                vOrderForm.emplace_back("PaymentRequest", std::move(value));
-            }
-            else
-#endif
             if (!rcp.message.isEmpty()) // Message from normal bitcoin:URI (bitcoin:123...?message=example)
                 vOrderForm.emplace_back("Message", rcp.message.toStdString());
         }
@@ -271,10 +231,6 @@ WalletModel::SendCoinsReturn WalletModel::sendCoins(WalletModelTransaction &tran
     // and emit coinsSent signal for each recipient
     for (const SendCoinsRecipient &rcp : transaction.getRecipients())
     {
-        // Don't touch the address book when we have a payment request
-#ifdef ENABLE_BIP70
-        if (!rcp.paymentRequest.IsInitialized())
-#endif
         {
             std::string strAddress = rcp.address.toStdString();
             CTxDestination dest = DecodeDestination(strAddress);
diff --git a/src/qt/walletmodel.h b/src/qt/walletmodel.h
index d180c9f8c4..5181d1c83b 100644
--- a/src/qt/walletmodel.h
+++ b/src/qt/walletmodel.h
@@ -5,18 +5,15 @@
 #ifndef BITCOIN_QT_WALLETMODEL_H
 #define BITCOIN_QT_WALLETMODEL_H
 
+#if defined(HAVE_CONFIG_H)
+#include <config/bitcoin-config.h>
+#endif
+
 #include <amount.h>
 #include <key.h>
 #include <serialize.h>
 #include <script/standard.h>
 
-#if defined(HAVE_CONFIG_H)
-#include <config/bitcoin-config.h>
-#endif
-
-#ifdef ENABLE_BIP70
-#include <qt/paymentrequestplus.h>
-#endif
 #include <qt/walletmodeltransaction.h>
 
 #include <interfaces/wallet.h>
@@ -67,15 +64,9 @@ public:
     CAmount amount;
     // If from a payment request, this is used for storing the memo
     QString message;
-
-#ifdef ENABLE_BIP70
-    // If from a payment request, paymentRequest.IsInitialized() will be true
-    PaymentRequestPlus paymentRequest;
-#else
     // If building with BIP70 is disabled, keep the payment request around as
     // serialized string to ensure load/store is lossless
     std::string sPaymentRequest;
-#endif
     // Empty if no authentication or invalid signature/cert/etc.
     QString authenticatedMerchant;
 
@@ -91,11 +82,6 @@ public:
         std::string sAddress = address.toStdString();
         std::string sLabel = label.toStdString();
         std::string sMessage = message.toStdString();
-#ifdef ENABLE_BIP70
-        std::string sPaymentRequest;
-        if (!ser_action.ForRead() && paymentRequest.IsInitialized())
-            paymentRequest.SerializeToString(&sPaymentRequest);
-#endif
         std::string sAuthenticatedMerchant = authenticatedMerchant.toStdString();
 
         READWRITE(this->nVersion);
@@ -111,10 +97,6 @@ public:
             address = QString::fromStdString(sAddress);
             label = QString::fromStdString(sLabel);
             message = QString::fromStdString(sMessage);
-#ifdef ENABLE_BIP70
-            if (!sPaymentRequest.empty())
-                paymentRequest.parse(QByteArray::fromRawData(sPaymentRequest.data(), sPaymentRequest.size()));
-#endif
             authenticatedMerchant = QString::fromStdString(sAuthenticatedMerchant);
         }
     }
diff --git a/src/qt/walletmodeltransaction.cpp b/src/qt/walletmodeltransaction.cpp
index d00ccf70d9..eba95bd27c 100644
--- a/src/qt/walletmodeltransaction.cpp
+++ b/src/qt/walletmodeltransaction.cpp
@@ -48,25 +48,6 @@ void WalletModelTransaction::reassignAmounts(int nChangePosRet)
     for (QList<SendCoinsRecipient>::iterator it = recipients.begin(); it != recipients.end(); ++it)
     {
         SendCoinsRecipient& rcp = (*it);
-
-#ifdef ENABLE_BIP70
-        if (rcp.paymentRequest.IsInitialized())
-        {
-            CAmount subtotal = 0;
-            const payments::PaymentDetails& details = rcp.paymentRequest.getDetails();
-            for (int j = 0; j < details.outputs_size(); j++)
-            {
-                const payments::Output& out = details.outputs(j);
-                if (out.amount() <= 0) continue;
-                if (i == nChangePosRet)
-                    i++;
-                subtotal += walletTransaction->vout[i].nValue;
-                i++;
-            }
-            rcp.amount = subtotal;
-        }
-        else // normal recipient (no payment request)
-#endif
         {
             if (i == nChangePosRet)
                 i++;