SteemRandomDraw is application that automate the draw.
Сonnecting the app with steemconnect seemed like something beyond possibilities. But thanks to steem developer portal, steemconnect sdk and this example I wrote test version of connection to steemconnect that was finalized by 
It is steemlogin.js where I wrote all that needed to connection.
+function getQueryVariable(variable)
+{
+ var query = window.location.search.substring(1);
+ var vars = query.split("&");
+ for (var i=0;i<vars.length;i++) {
+ var pair = vars[i].split("=");
+ if(pair[0] == variable){return pair[1];}
+ }
+ return(false);
+}
+
+sc2.init({
+ app:'delayed-upvotes',
+ callbackURL: 'https://deadz.github.io/SteemRandomDraw/',
+ accessToken: 'access_token',
+ scope: ['comment']
+})
+
+//authentication
+var link = sc2.getLoginURL();
+if (window.location.search == "")
+ window.location.replace(link);
+//
+
+sc2.setAccessToken(getQueryVariable('access_token'));
+
+function commentWinnerList(author, authorPermlink, winners)
+{
+ var permlink = steem.formatter.commentPermlink(author, authorPermlink);
+ console.log(permlink);
+ console.log(winners);
+ var message = "test";
+ sc2.comment(author, authorPermlink, author, permlink, '', message, '', function(err, result) {
+ console.log(err, result);
+ });
+}
This bug appeared when you enter two different links in one session like with different authors or/and different permlink. The winner from the first contest was keeped in the list as well as the winner from second contest was added to the same list.
I added two boolean variables flag1 and flag2 one for sessionStorage.author and other for sessionStorage.permlink.
var flag1 = true;
var flag2 = true;
In the function getAuthorPermlink I added this lines:
flag1 = (sessionStorage.author == link_split.split(regex_v2)[0]);
flag2 = (sessionStorage.permlink == link_split.split(regex_v2)[1]);
Here I check if previous value of sessionStorage.author and sessionStorage.permlink were the same as in new contest link.
And finally:
if (!(flag1 && flag2))
{
win_list = [];
number_of_draws="1";
}
Here I set variables to their init value.
if you have some suggestions write it here or contact me on discord CleverShovel#7855