balance() and balanceDisplay() shows balance = 0.0

[HKby]

---

Expected Behavior

Example wallet has balance in both ETH / USDC
ETH balance 0.012002096113860558
USDC balance 12.60609

Actual Behavior

ETH balance 0.0
USDC balance 0.0

Using the wallet() / walletDisplay() can do expected behaviour

Steps to Reproduce the Problem

1. prepare reproduce.ts

import { CrocEnv } from '../croc';
import { ethers } from 'ethers';
import * as dotenv from 'dotenv';
// console.log({ path: __dirname+'/.env' })
dotenv.config();
const USDC = "0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48" // USDC on mainnet

// set up RPC 
    const wallet = new ethers.Wallet(KEY)
    console.log("Processing wallet", wallet.address)
    const croc = new CrocEnv("mainnet", wallet)

 // balance before swap 

    const ethBalance = await croc.tokenEth().balanceDisplay(wallet.address)
    console.log("ETH balance", ethBalance)

    const usdcBalance = await croc.token(USDC).balanceDisplay(wallet.address)
    console.log("USDC balance", usdcBalance)

2. run in terminal

ts-node reproduce.ts

## Specifications

- Version: 0.3.9-3
- Platform: Mac OS
- ts-node version: v10.9.2
- other tsconfig.json and package.json same as sdk package.