From b86ef2f3f76ac5df667f6f760bc2e7175d75147d Mon Sep 17 00:00:00 2001
From: adriafolchmrf <adria.folch@marfeel.com>
Date: Fri, 15 Mar 2019 13:27:36 +0100
Subject: [PATCH] Use aliases in userSync endpoint for PrebidServerAdapter

---
 modules/prebidServerBidAdapter/index.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/modules/prebidServerBidAdapter/index.js b/modules/prebidServerBidAdapter/index.js
index fdcab82d247..1a9b9cc3260 100644
--- a/modules/prebidServerBidAdapter/index.js
+++ b/modules/prebidServerBidAdapter/index.js
@@ -687,7 +687,10 @@ export function PrebidServer() {
 
     if (_s2sConfig && _s2sConfig.syncEndpoint) {
       let consent = (Array.isArray(bidRequests) && bidRequests.length > 0) ? bidRequests[0].gdprConsent : undefined;
-      queueSync(_s2sConfig.bidders, consent);
+      let syncBidders = _s2sConfig.bidders.map((bidder) => adaptermanager.aliasRegistry[bidder] || bidder);
+
+      syncBidders = syncBidders.filter((bidder, index) => (syncBidders.indexOf(bidder) === index));
+      queueSync(syncBidders, consent);
     }
 
     const request = protocolAdapter().buildRequest(s2sBidRequest, bidRequests, adUnitsWithSizes);