message: Fix token check on DidUpdate
diff: @@ -479,17 +479,19 @@ class Exchange extends PureComponent<any, any> {
  componentDidUpdate(prevProps, prevState) {
  const { haveCurrency: prevHaveCurrency } = prevState
  - const { haveCurrency, isTokenSell } = this.state
  + const { haveCurrency } = this.state
  if (prevHaveCurrency !== haveCurrency) {
  - this.setState(() => ({
  - isTokenSell: ethToken.isEthToken({ name: haveCurrency }),
  - }))
  - }
  + const isTokenSell = ethToken.isEthToken({ name: haveCurrency })
  + this.setState(() => ({
  + isTokenSell,
  + }), () => {
  if (isTokenSell) {
  this.hasTokenAllowance()
  }
  + })
  + }
  }
  getInfoAboutCurrency = async () => {
  