fix types

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.83-rc1",
+  "version": "0.20.83-rc2",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",

src/services/BlockchainService/index.ts

@@ -273,7 +273,7 @@ class BlockchainService {
 
   getReferralData = (walletAddress: string) => fetchWithValidation(
     `${this.apiUrl}/api/referral-data/${walletAddress}`,
-    referralDataSchema,
+    z.number().nonnegative(),
     { headers: this.basicAuthHeaders }
   );