Subject unl list to consensus. (#186)

* Unl hash in consensus proposals.
* Unl syncing and sync request serving.
* Adding unl hash to the ledger block.

src/main.cpp

@@ -17,6 +17,7 @@
 #include "state/state_common.hpp"
 #include "state/state_sync.hpp"
 #include "state/state_serve.hpp"
+#include "unl.hpp"
 
 /**
  * Parses CLI args and extracts hot pocket command and parameters given.
@@ -76,6 +77,7 @@ void deinit()
     state_sync::deinit();
     state_serve::deinit();
     sc::deinit();
+    unl::deinit();
     ledger::deinit();
 }
 
@@ -197,15 +199,16 @@ int main(int argc, char **argv)
                          << (conf::cfg.operating_mode == conf::OPERATING_MODE::OBSERVER ? "Observer" : "Proposer");
                 LOG_INFO << "Public key: " << conf::cfg.pubkeyhex.substr(2); // Public key without 'ed' prefix.
 
-                if (ledger::init() ||
-                    sc::init() ||
-                    state_common::init() != 0 ||
-                    state_serve::init() != 0 ||
-                    state_sync::init() != 0 ||
-                    consensus::init() != 0 ||
-                    read_req::init() != 0 ||
-                    p2p::init() != 0 ||
-                    usr::init() != 0)
+                if (ledger::init() == -1 ||
+                    unl::init() == -1 ||
+                    sc::init() == -1 ||
+                    state_common::init() == -1 ||
+                    state_serve::init() == -1 ||
+                    state_sync::init() == -1 ||
+                    consensus::init() == -1 ||
+                    read_req::init() == -1 ||
+                    p2p::init() == -1 ||
+                    usr::init() == -1)
                 {
                     deinit();
                     return -1;