EMX Adding Schain forwarding (prebid#5946)

* adding ccpa support for emx_digital adapter

* emx_digital ccpa compliance: lint fix

* emx 3.0 compliance update

* fix outstream renderer issue, update test spec

* refactor formatVideoResponse function to use core-js/find

* Add support for schain forwarding

Co-authored-by: Nick Colletti <nick.colletti@emxdigital.com>
Co-authored-by: Nick Colletti <gnomish@gmail.com>
Co-authored-by: Kiyoshi Hara <Kiyoshi.Hara@emxdigital.com>
Co-authored-by: Dan Bogdan <daniel.bogdan@emxdigital.com>
Co-authored-by: Jherez Taylor <jherez.taylor@emxdigital.com>
Co-authored-by: EMXDigital <emxdigital@emxdigital.com>

modules/emx_digitalBidAdapter.js

@@ -156,6 +156,17 @@ export const emxAdapter = {
       };
     }
 
+    return emxData;
+  },
+  getSupplyChain: (bidRequests, emxData) => {
+    if (bidRequests.schain) {
+      emxData.source = {
+        ext: {
+          schain: bidRequests.schain
+        }
+      };
+    }
+
     return emxData;
   }
 };
@@ -237,6 +248,7 @@ export const spec = {
     };
 
     emxData = emxAdapter.getGdpr(bidderRequest, Object.assign({}, emxData));
+    emxData = emxAdapter.getSupplyChain(bidderRequest, Object.assign({}, emxData));
     if (bidderRequest && bidderRequest.uspConsent) {
       emxData.us_privacy = bidderRequest.uspConsent
     }

test/spec/modules/emx_digitalBidAdapter_spec.js

@@ -367,6 +367,27 @@ describe('emx_digital Adapter', function () {
       expect(request.us_privacy).to.exist;
       expect(request.us_privacy).to.exist.and.to.equal(consentString);
     });
+
+    it('should add schain object to request', function() {
+      const schainBidderRequest = utils.deepClone(bidderRequest);
+      schainBidderRequest.schain = {
+        'complete': 1,
+        'ver': '1.0',
+        'nodes': [
+          {
+            'asi': 'testing.com',
+            'sid': 'abc',
+            'hp': 1
+          }
+        ]
+      };
+      let request = spec.buildRequests(schainBidderRequest.bids, schainBidderRequest);
+      request = JSON.parse(request.data);
+      expect(request.source.ext.schain).to.exist;
+      expect(request.source.ext.schain).to.have.property('complete', 1);
+      expect(request.source.ext.schain).to.have.property('ver', '1.0');
+      expect(request.source.ext.schain.nodes[0].asi).to.equal(schainBidderRequest.schain.nodes[0].asi);
+    });
   });
 
   describe('interpretResponse', function () {