do not set a default GPP string. keep it backwards compat

Author: gilluminate

clients/fides-js/src/lib/fidesString.ts

@@ -3,9 +3,6 @@ import { CmpApi } from "@iabgpp/cmpapi";
 import { FIDES_SEPARATOR } from "./tcf/constants";
 import { VendorSources } from "./tcf/vendors";
 
-/** Default GPP string to use when no CmpApi is provided or when it returns no string */
-export const DEFAULT_GPP_STRING = "DBAA";
-
 export interface DecodedFidesString {
   tc: string;
   ac: string;
@@ -74,15 +71,15 @@ export const idsFromAcString = (acString: string) => {
  * Formats the fides_string with the GPP string from the CMP API.
  * In a TCF experience, appends the GPP string as the third part.
  * In a non-TCF experience, uses empty strings for TCF and AC parts.
- * @param cmpApi Optional GPP CMP API instance. If not provided, uses DEFAULT_GPP_STRING
+ * @param cmpApi Optional GPP CMP API instance.
  * @returns The formatted fides_string
  */
-export const formatFidesStringWithGpp = (cmpApi?: CmpApi): string => {
-  const gppString = cmpApi?.getGppString() || DEFAULT_GPP_STRING;
+export const formatFidesStringWithGpp = (cmpApi: CmpApi): string => {
+  const gppString = cmpApi.getGppString();
   return window.Fides.options.tcfEnabled
     ? [...(window.Fides.fides_string?.split(FIDES_SEPARATOR) || []), "", ""]
         .slice(0, 2)
-        .concat(gppString)
+        .concat(gppString || "")
         .join(FIDES_SEPARATOR)
-    : `,,${gppString}`;
+    : `,${gppString ? `,${gppString}` : ""}`;
 };

clients/fides-js/src/lib/tcf.ts

@@ -9,7 +9,6 @@ import { CmpApi, TCData } from "@iabtechlabtcf/cmpapi";
 import { GVL, Segment, TCModel, TCString } from "@iabtechlabtcf/core";
 
 import { PrivacyExperience, PrivacyExperienceMinimal } from "./consent-types";
-import { formatFidesStringWithGpp } from "./fidesString";
 import { ETHYCA_CMP_ID, FIDES_SEPARATOR } from "./tcf/constants";
 import { extractTCStringForCmpApi } from "./tcf/events";
 import { EnabledIds } from "./tcf/types";
@@ -199,14 +198,6 @@ export const initializeTcfCmpApi = () => {
   // Initialize api with TC str, we don't yet show UI, so we use false
   // see https://github.com/InteractiveAdvertisingBureau/iabtcf-es/tree/master/modules/cmpapi#dont-show-ui--tc-string-does-not-need-an-update
   window.addEventListener("FidesInitialized", (event) => {
-    // Set default GPP string if GPP is enabled. This will get updated by the GPP extension
-    if (window.Fides.experience?.gpp_settings?.enabled) {
-      window.Fides.fides_string =
-        window.Fides.fides_string ||
-        window.Fides.cookie?.fides_string ||
-        formatFidesStringWithGpp();
-    }
-
     const tcString = extractTCStringForCmpApi(event);
     cmpApi.update(tcString, false);
   });