Modification JsonBuilder

Author: cherubrock-seb

include/core/Version.hpp

@@ -4,7 +4,7 @@
 #include <string>
 
 namespace core {
-    const std::string PRMERS_VERSION = "4.15.59-alpha";
+    const std::string PRMERS_VERSION = "4.15.60-alpha";
 } // namespace core
 
 #endif // VERSION_HPP

src/io/JsonBuilder.cpp

@@ -394,7 +394,7 @@ static std::string generatePrimeNetJson(
         if (isEdw) canon << "E";                                 // sigma
         if (opts.sigma192) {
             canon << opts.sigma192;                              // *** TODO: not sure where this value comes from ***
-        } else if (opts.sigma_hex) {
+        } else if (!opts.sigma_hex.empty()) {
             canon << "0x" << toLower(opts.sigma_hex);
         } else if (opts.sigma) {
             canon << opts.sigma;