message: fix counting getAmount
diff: @@ -1057,7 +1057,8 @@ class Exchange extends PureComponent<any, any> {
  setAmountOnState = (maxAmount, getAmount, buyAmount) => {
  const { getCurrency, haveAmount } = this.state
  - const decimalPlaces = constants.tokenDecimals[getCurrency.toLowerCase()]
  + const {coin: getCurrencyName } = getCoinInfo(getCurrency)
  + const decimalPlaces = constants.tokenDecimals[getCurrencyName.toLowerCase()]
  this.setState(() => ({
  maxAmount: Number(maxAmount),
  