Fixed token symbol formatting

src/tokenPriceOracle.ts

@@ -46,7 +46,7 @@ export class TokenPriceOracle {
     return prices.reduce((acc, price, index) => {
       const tokenPriceInwei = (price * BigInt(10 ** tokens[index].decimals)) / BigInt(10 ** 18);
 
-      acc[tokens[index].symbol] = tokenPriceInwei.toString();
+      acc[tokens[index].symbol.toLowerCase()] = tokenPriceInwei.toString();
 
       return acc;
     }, {} as TokenPrices);