Add application version compatibility check.

src/device/device_ledger.cpp

@@ -302,8 +302,24 @@ namespace hw {
     }
 
     bool device_ledger::reset() {
-        send_simple(INS_RESET);
-        return true;
+      reset_buffer();
+      int offset = set_command_header_noopt(INS_RESET);
+      memmove(this->buffer_send+offset, MONERO_VERSION, strlen(MONERO_VERSION));
+      offset += strlen(MONERO_VERSION);
+      this->buffer_send[4] = offset-5;
+      this->length_send = offset;
+      this->exchange();
+
+      ASSERT_X(this->length_recv>=3, "Communication error, less than three bytes received. Check your application version.");
+
+      unsigned int device_version = 0;
+      device_version = VERSION(this->buffer_recv[0], this->buffer_recv[1], this->buffer_recv[2]);
+  
+      ASSERT_X (device_version >= MINIMAL_APP_VERSION,  
+                "Unsupported device application version: " << VERSION_MAJOR(device_version)<<"."<<VERSION_MINOR(device_version)<<"."<<VERSION_MICRO(device_version) << 
+                " At least " << MINIMAL_APP_VERSION_MAJOR<<"."<<MINIMAL_APP_VERSION_MINOR<<"."<<MINIMAL_APP_VERSION_MICRO<<" is required.");
+     
+      return true;
     }
      
     unsigned int device_ledger::exchange(unsigned int ok, unsigned int mask) {

src/device/device_ledger.hpp

@@ -41,6 +41,18 @@ namespace hw {
 
     namespace ledger {
 
+    /* Minimal supported version */
+    #define MINIMAL_APP_VERSION_MAJOR    1
+    #define MINIMAL_APP_VERSION_MINOR    3
+    #define MINIMAL_APP_VERSION_MICRO    1
+
+    #define VERSION(M,m,u)       ((M)<<16|(m)<<8|(u))
+    #define VERSION_MAJOR(v)     (((v)>>16)&0xFF)
+    #define VERSION_MINOR(v)     (((v)>>8)&0xFF)
+    #define VERSION_MICRO(v)     (((v)>>0)&0xFF)
+    
+    #define MINIMAL_APP_VERSION   VERSION(MINIMAL_APP_VERSION_MAJOR, MINIMAL_APP_VERSION_MINOR, MINIMAL_APP_VERSION_MICRO)
+
     void register_all(std::map<std::string, std::unique_ptr<device>> &registry);
 
     #ifdef WITH_DEVICE_LEDGER