Add to_string functions to the classes asc_pull_req and asc_pull_ack (#4255)

Adding ::to_string methods to asc_pull_req and asc_pull_ack messages.

nano/node/messages.cpp

@@ -23,7 +23,9 @@
 #include <sstream>
 #include <stdexcept>
 #include <string>
+#include <type_traits>
 #include <utility>
+#include <variant>
 #include <vector>
 
 /*
@@ -1656,6 +1658,35 @@ bool nano::asc_pull_req::verify_consistency () const
 	return true; // Just for convenience of calling from asserts
 }
 
+std::string nano::asc_pull_req::to_string () const
+{
+	std::string s = header.to_string () + "\n";
+
+	std::visit ([&s] (auto && arg) {
+		using T = std::decay_t<decltype (arg)>;
+
+		if constexpr (std::is_same_v<T, nano::empty_payload>)
+		{
+			s += "missing payload";
+		}
+
+		else if constexpr (std::is_same_v<T, nano::asc_pull_req::blocks_payload>)
+		{
+			s += "acc:" + arg.start.to_string ();
+			s += " max block count:" + to_string_hex (static_cast<uint16_t> (arg.count));
+			s += " hash type:" + to_string_hex (static_cast<uint16_t> (arg.start_type));
+		}
+
+		else if constexpr (std::is_same_v<T, nano::asc_pull_req::account_info_payload>)
+		{
+			s += "target:" + arg.target.to_string ();
+			s += " hash type:" + to_string_hex (static_cast<uint16_t> (arg.target_type));
+		}
+	},
+	payload);
+
+	return s;
+}
 /*
  * asc_pull_req::blocks_payload
  */
@@ -1809,6 +1840,45 @@ bool nano::asc_pull_ack::verify_consistency () const
 	return true; // Just for convenience of calling from asserts
 }
 
+std::string nano::asc_pull_ack::to_string () const
+{
+	std::string s = header.to_string () + "\n";
+
+	std::visit ([&s] (auto && arg) {
+		using T = std::decay_t<decltype (arg)>;
+
+		if constexpr (std::is_same_v<T, nano::empty_payload>)
+		{
+			s += "missing payload";
+		}
+
+		else if constexpr (std::is_same_v<T, nano::asc_pull_ack::blocks_payload>)
+		{
+			auto block = std::begin (arg.blocks);
+			auto end_block = std::end (arg.blocks);
+
+			while (block != end_block)
+			{
+				s += (*block)->to_json ();
+				++block;
+			}
+		}
+
+		else if constexpr (std::is_same_v<T, nano::asc_pull_ack::account_info_payload>)
+		{
+			s += "account public key:" + arg.account.to_account ();
+			s += " account open:" + arg.account_open.to_string ();
+			s += " account head:" + arg.account_head.to_string ();
+			s += " block count:" + to_string_hex (arg.account_block_count);
+			s += " confirmation frontier:" + arg.account_conf_frontier.to_string ();
+			s += " confirmation height:" + to_string_hex (arg.account_conf_height);
+		}
+	},
+	payload);
+
+	return s;
+}
+
 /*
  * asc_pull_ack::blocks_payload
  */

nano/node/messages.hpp

@@ -429,6 +429,7 @@ public:
 
 	void serialize_payload (nano::stream &) const;
 	void deserialize_payload (nano::stream &);
+	std::string to_string () const;
 
 private: // Debug
 	/**
@@ -504,6 +505,7 @@ public:
 
 	void serialize_payload (nano::stream &) const;
 	void deserialize_payload (nano::stream &);
+	std::string to_string () const;
 
 private: // Debug
 	/**
@@ -613,4 +615,4 @@ public:
 	}
 	virtual void default_handler (nano::message const &){};
 };
-}
+}