fix decimal overflow issue

Author: DyT9qC

src/utils/token.ts

@@ -76,7 +76,7 @@ export function fetchTokenDecimals(tokenAddress: Address): BigInt {
   let contract = ERC20.bind(tokenAddress)
   // try types uint8 for decimals
   let decimalValue = null
-  let decimalResult = contract.try_decimals()
+  let decimalResult  = contract.tryCall("decimals", "decimals():(uint8)", []);
   if (!decimalResult.reverted) {
     if (decimalResult.value.kind == ethereum.ValueKind.INT || decimalResult.value.kind == ethereum.ValueKind.UINT) {
       // types(uint8).max=255