Advanced: ReserveProof: Add support for reserve proof

This change adds the ability to prove and check a reserve proof
to this existing "Prove/check" advanced menu. If the amount line has
a valid amount less than that of the current account index this input
will drive the logic for generating a reserve proof. Checking a reserve
proof is accomplished by validating the address and verifying that
signature.indexOf("ReserveProofV") === 0. The result displays the total
and spent amount of the proof.

2 files changed, 21 insertions, 0 deletions

diff --git a/src/libwalletqt/Wallet.cpp b/src/libwalletqt/Wallet.cpp
index e19a810c..6c22c91a 100644
--- a/src/libwalletqt/Wallet.cpp
+++ b/src/libwalletqt/Wallet.cpp
@@ -844,6 +844,25 @@ Q_INVOKABLE QString Wallet::checkSpendProof(const QString &txid, const QString &
     return QString::fromStdString(result);
 }
 
+Q_INVOKABLE QString Wallet::getReserveProof(bool all, quint32 account_index, quint64 amount, const QString &message) const
+{
+    qDebug("Generating reserve proof");
+    std::string result = m_walletImpl->getReserveProof(all, account_index, amount, message.toStdString());
+    if (result.empty())
+        result = "error|" + m_walletImpl->errorString();
+    return QString::fromStdString(result);
+}
+
+Q_INVOKABLE QString Wallet::checkReserveProof(const QString &address, const QString &message, const QString &signature) const
+{
+    bool good;
+    u_int64_t total;
+    u_int64_t spent;
+    bool success = m_walletImpl->checkReserveProof(address.toStdString(), message.toStdString(), signature.toStdString(), good, total, spent);
+    std::string result = std::string(success ? "true" : "false") + "|" + std::string(good ? "true" : "false") + "|" + QString::number(total).toStdString() + "|" + QString::number(spent).toStdString();
+    return QString::fromStdString(result);
+}
+
 QString Wallet::signMessage(const QString &message, bool filename) const
 {
   if (filename) {
diff --git a/src/libwalletqt/Wallet.h b/src/libwalletqt/Wallet.h
index 9b5bdd46..a81b4555 100644
--- a/src/libwalletqt/Wallet.h
+++ b/src/libwalletqt/Wallet.h
@@ -318,6 +318,8 @@ public:
     Q_INVOKABLE QString getSpendProof(const QString &txid, const QString &message) const;
     Q_INVOKABLE void getSpendProofAsync(const QString &txid, const QString &message, const QJSValue &callback);
     Q_INVOKABLE QString checkSpendProof(const QString &txid, const QString &message, const QString &signature) const;
+    Q_INVOKABLE QString getReserveProof(bool all, quint32 account_index, quint64 amount, const QString &message) const;
+    Q_INVOKABLE QString checkReserveProof(const QString &address, const QString &message, const QString &signature) const;
     // Rescan spent outputs
     Q_INVOKABLE bool rescanSpent();