diff --git a/package.json b/package.json
index bcb98ac..d4959c7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.21.1",
+  "version": "0.21.2-rc0",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/services/Aggregator/index.ts b/src/services/Aggregator/index.ts
index 9a1d53a..1acd59a 100644
--- a/src/services/Aggregator/index.ts
+++ b/src/services/Aggregator/index.ts
@@ -6,7 +6,7 @@ import cancelOrderSchema from './schemas/cancelOrderSchema.js';
 import orderBenefitsSchema from './schemas/orderBenefitsSchema.js';
 import errorSchema from './schemas/errorSchema.js';
 import placeAtomicSwapSchema from './schemas/placeAtomicSwapSchema.js';
-import { AggregatorWS } from './ws/index.js';
+import { AggregatorWS } from './ws';
 import { atomicSwapHistorySchema } from './schemas/atomicSwapHistorySchema.js';
 import type { BasicAuthCredentials, OrderSource, SignedCancelOrderRequest, SignedOrder } from '../../types.js';
 import {
@@ -209,6 +209,7 @@ class Aggregator {
     partnerId?: string,
     source?: OrderSource,
     rawExchangeRestrictions?: string | undefined,
+    widgetOwner?: string,
   ) => {
     const headers = {
       'Content-Type': 'application/json',
@@ -218,6 +219,7 @@ class Aggregator {
       },
       ...(partnerId !== undefined) && { 'X-Partner-Id': partnerId },
       ...(source !== undefined) && { 'X-Source': source },
+      ...(widgetOwner !== undefined) && { 'X-Widget-Owner': widgetOwner },
       ...this.basicAuthHeaders,
     };
 
diff --git a/src/services/ReferralSystem/index.ts b/src/services/ReferralSystem/index.ts
index 9305886..8e2aae2 100644
--- a/src/services/ReferralSystem/index.ts
+++ b/src/services/ReferralSystem/index.ts
@@ -1,4 +1,3 @@
-import { z } from 'zod';
 import { fetchWithValidation } from 'simple-typed-fetch';
 import {
   errorSchema,
@@ -41,14 +40,6 @@ type SignatureType = {
   signature: string
 };
 
-type submitTransactionDataForWidgetPayload = {
-  partner_domain: string
-  sender_address: string
-  tx_hash: string
-  chain_id: number
-  signature: string
-}
-
 class ReferralSystem {
   private readonly apiUrl: string
 
@@ -76,7 +67,6 @@ class ReferralSystem {
     this.getContractsAddresses = this.getContractsAddresses.bind(this);
     this.getClaimInfo = this.getClaimInfo.bind(this);
     this.getAggregatedHistory = this.getAggregatedHistory.bind(this);
-    this.submitTransactionDataForWidget = this.submitTransactionDataForWidget.bind(this);
   }
 
   getLink = (refererAddress: string) =>
@@ -302,20 +292,6 @@ class ReferralSystem {
       errorSchema
     );
   };
-
-  submitTransactionDataForWidget = (payload: submitTransactionDataForWidgetPayload) => {
-    return fetchWithValidation(
-      `${this.apiUrl}/referer/widget/submit`,
-      z.unknown(),
-      {
-        headers: {
-          'Content-type': 'application/json',
-        },
-        method: 'POST',
-        body: JSON.stringify(payload)
-      }
-    );
-  };
 }
 
 export * as schemas from './schemas/index.js';