Method parseUnits

tests/helpers/FiatToken.ts:138–140

* parseUnits parse the ERC20 string amount to subunits. * @param amount {string} - the USDC ERC20 string amount, e.g. "0.000001" * @returns

(amount: string)

   * @returns
   */
  static parseUnits(amount: string): bigint {
    return parseUnits(amount, USDC.decimals)
  }

  /**
   * formatUnits convert the subunits to ERC20 string amount.