Startio adding buyerid

modules/startioBidAdapter.js

@@ -51,6 +51,11 @@ const converter = ortbConverter({
       request.regs.ext.us_privacy = bidderRequest.uspConsent;
     }
 
+    const startioEid = request.user?.ext?.eids?.find(eid => eid.source === 'start.io');
+    if (startioEid?.uids?.[0]?.id) {
+      request.user.buyeruid = startioEid.uids[0].id;
+    }
+
     request.bcat = ortb?.bcat || bidParams?.bcat;
     request.badv = ortb?.badv || bidParams?.badv;
     request.bapp = ortb?.bapp || bidParams?.bapp;

modules/startioBidAdapter.md

@@ -10,6 +10,14 @@ Maintainer: prebid@start.io
 
 The Start.io Bid Adapter enables publishers to integrate with Start.io's demand sources for banner, video and native ad formats. The adapter supports OpenRTB standards and processes bid requests efficiently using the Prebid.js framework.
 
+# Build
+
+To build Prebid.js with the Start.io User ID submodule and bid adapter, include the following modules:
+
+```bash
+gulp build --modules=startioBidAdapter,userId,startioIdSystem,consentManagementTcf,consentManagementGpp,consentManagementUsp,...
+```
+
 # Test Parameters
 ```
 var adUnits = [

test/spec/modules/startioBidAdapter_spec.js

@@ -259,6 +259,41 @@ describe('Prebid Adapter: Startio', function () {
       expect(request.regs.coppa).to.equal(1);
     });
 
+    it('should set buyeruid from start.io eid', function () {
+      let bidderRequest = deepClone(DEFAULT_BIDDER_REQUEST);
+      bidderRequest.ortb2 = {
+        user: {
+          ext: {
+            eids: [
+              { source: 'start.io', uids: [{ id: 'test-startio-id', atype: 1 }] }
+            ]
+          }
+        }
+      };
+
+      const request = spec.buildRequests([DEFAULT_REQUEST_DATA], bidderRequest)[0].data;
+
+      expect(request.user).to.exist;
+      expect(request.user.buyeruid).to.equal('test-startio-id');
+    });
+
+    it('should not set buyeruid when start.io eid is absent', function () {
+      let bidderRequest = deepClone(DEFAULT_BIDDER_REQUEST);
+      bidderRequest.ortb2 = {
+        user: {
+          ext: {
+            eids: [
+              { source: 'other.com', uids: [{ id: 'other-id', atype: 1 }] }
+            ]
+          }
+        }
+      };
+
+      const request = spec.buildRequests([DEFAULT_REQUEST_DATA], bidderRequest)[0].data;
+
+      expect(request.user?.buyeruid).to.not.exist;
+    });
+
     it('should provide blocked parameters', function () {
       let bidRequest = deepClone(DEFAULT_REQUEST_DATA);
       let bidderRequest = deepClone(DEFAULT_BIDDER_REQUEST);