Token warning updates (#614)

* update for token routing

* fix imports

src/components/ExchangePage/index.jsx

@@ -7,7 +7,7 @@ import { useTranslation } from 'react-i18next'
 
 import { useWeb3React } from '../../hooks'
 import { brokenTokens } from '../../constants'
-import { amountFormatter, calculateGasMargin } from '../../utils'
+import { amountFormatter, calculateGasMargin, isAddress } from '../../utils'
 
 import { useExchangeContract } from '../../hooks'
 import { useTokenDetails, INITIAL_TOKENS_CONTEXT } from '../../contexts/Tokens'
@@ -258,6 +258,9 @@ export default function ExchangePage({ initialCurrency, sending = false, params
   if (params.outputCurrency) {
     urlAddedTokens[params.outputCurrency] = true
   }
+  if (isAddress(initialCurrency)) {
+    urlAddedTokens[initialCurrency] = true
+  }
 
   // BigNumber.js instance
   const ethPrice = useETHPriceInUSD()