From adad8d0a567b34c43796e9d06082423a04277e35 Mon Sep 17 00:00:00 2001
From: woodser <woodser@protonmail.com>
Date: Tue, 2 Jul 2019 12:29:14 -0400
Subject: [PATCH] implement sign() and verify()

---
 src/wallet/MoneroWallet.cpp | 29 +++++++++++++++++++++++++++++
 src/wallet/MoneroWallet.h   | 36 ++++++++++++++++++------------------
 2 files changed, 47 insertions(+), 18 deletions(-)

diff --git a/src/wallet/MoneroWallet.cpp b/src/wallet/MoneroWallet.cpp
index 17e446b..e4a9c86 100644
--- a/src/wallet/MoneroWallet.cpp
+++ b/src/wallet/MoneroWallet.cpp
@@ -1322,6 +1322,35 @@ namespace monero {
     }
   }
 
+  string MoneroWallet::sign(const string& msg) const {
+    return wallet2->sign(msg);
+  }
+
+  bool MoneroWallet::verify(const string& msg, const string& address, const string& signature) const {
+
+    // validate and parse address or url
+    cryptonote::address_parse_info info;
+    string err;
+    if (!get_account_address_from_str_or_url(info, wallet2->nettype(), address,
+      [&err](const std::string &url, const std::vector<std::string> &addresses, bool dnssec_valid)->std::string {
+        if (!dnssec_valid) {
+          err = std::string("Invalid DNSSEC for ") + url;
+          return {};
+        }
+        if (addresses.empty()) {
+          err = std::string("No Monero address found at ") + url;
+          return {};
+        }
+        return addresses[0];
+      }))
+    {
+      throw runtime_error(err);
+    }
+
+    // verify and return result
+    return wallet2->verify(msg, info.address, signature);
+  }
+
   string MoneroWallet::createPaymentUri(const MoneroSendRequest& request) const {
     cout << "createPaymentUri()" << endl;
 
diff --git a/src/wallet/MoneroWallet.h b/src/wallet/MoneroWallet.h
index f6a5324..5b3c87b 100644
--- a/src/wallet/MoneroWallet.h
+++ b/src/wallet/MoneroWallet.h
@@ -791,24 +791,24 @@ namespace monero {
      */
     void setTxNotes(const vector<string>& txIds, const vector<string>& notes);
 
-//    /**
-//     * Sign a message.
-//     *
-//     * @param msg is the message to sign
-//     * @return the signature
-//     */
-//    public string sign(string msg);
-//
-//    /**
-//     * Verify a signature on a message.
-//     *
-//     * @param msg is the signed message
-//     * @param address is the signing address
-//     * @param signature is the signature
-//     * @return true if the signature is good, false otherwise
-//     */
-//    public boolean verify(string msg, string address, string signature);
-//
+    /**
+     * Sign a message.
+     *
+     * @param msg is the message to sign
+     * @return the signature
+     */
+    string sign(const string& msg) const;
+
+    /**
+     * Verify a signature on a message.
+     *
+     * @param msg is the signed message
+     * @param address is the signing address
+     * @param signature is the signature
+     * @return true if the signature is good, false otherwise
+     */
+    bool verify(const string& msg, const string& address, const string& signature) const;
+
 //    /**
 //     * Get a transaction's secret key from its id.
 //     *