Fix: Use correct function for listing payment token cache (#1831)

The listing payment token cache was incorrectly using getOfferPaymentToken()
instead of getListingPaymentToken(). This caused the wrong token address to
be cached for listings.

This bug could lead to issues when listing payment tokens differ from offer
payment tokens on certain chains.

Author: madisoncarter1234

src/sdk.ts

@@ -28,6 +28,7 @@ import {
 import {
   getDefaultConduit,
   getOfferPaymentToken,
+  getListingPaymentToken,
   getSeaportAddress,
 } from "./utils/utils";
 
@@ -101,7 +102,9 @@ export class OpenSeaSDK {
 
     // Cache decimals for offer and listing payment tokens to skip network request
     const offerPaymentToken = getOfferPaymentToken(this.chain).toLowerCase();
-    const listingPaymentToken = getOfferPaymentToken(this.chain).toLowerCase();
+    const listingPaymentToken = getListingPaymentToken(
+      this.chain,
+    ).toLowerCase();
     this._cachedPaymentTokenDecimals[offerPaymentToken] = 18;
     this._cachedPaymentTokenDecimals[listingPaymentToken] = 18;