Do not make empty queries to coingecko (#1285)

typescript/sdk/src/gas/token-prices.ts

@@ -104,11 +104,13 @@ export class CoinGeckoTokenPriceGetter implements TokenPriceGetter {
     }
 
     const toQuery = chains.filter((c) => !this.cache.isFresh(c));
+    if (toQuery.length > 0) {
       try {
         await this.queryTokenPrices(toQuery);
       } catch (e) {
         warn('Failed to query token prices', e);
       }
+    }
     return chains.map((chain) => this.cache.fetch(chain));
   }