Finally implement the "sticky" chain node

src/hz.erl

@@ -582,7 +582,7 @@ next_nonce(AccountID) ->
 %       {ok, #{"reason" := Reason}}              -> {error, Reason};
 %       Error                                    -> Error
 %   end.
-    case request(["/v3/accounts/", AccountID]) of
+    case request_sticky(["/v3/accounts/", AccountID]) of
         {ok, #{"nonce"  := Nonce}}               -> {ok, Nonce + 1};
         {ok, #{"reason" := "Account not found"}} -> {ok, 1};
         {ok, #{"reason" := Reason}}              -> {error, Reason};
@@ -729,7 +729,7 @@ tx_info(ID) ->
 
 post_tx(Data) when is_binary(Data) ->
     JSON = zj:binary_encode(#{tx => Data}),
-    request("/v3/transactions", JSON);
+    request_sticky("/v3/transactions", JSON);
 post_tx(Data) when is_list(Data) ->
     post_tx(list_to_binary(Data)).
 
@@ -841,6 +841,14 @@ status_chainends() ->
     request("/v3/status/chain-ends").
 
 
+request_sticky(Path) ->
+    hz_man:request_sticky(unicode:characters_to_list(Path)).
+
+
+request_sticky(Path, Payload) ->
+    hz_man:request_sticky(unicode:characters_to_list(Path), Payload).
+
+
 request(Path) ->
     hz_man:request(unicode:characters_to_list(Path)).