Token pasting fix (#584)

* fix for null value

* remove logs

src/components/CurrencyInputPanel/index.js

@@ -490,20 +490,23 @@ function CurrencySelectModal({ isOpen, onDismiss, onTokenSelect }) {
   const tokenList = useMemo(() => {
     return Object.keys(allTokens)
       .sort((a, b) => {
+        if (allTokens[a].symbol && allTokens[b].symbol) {
           const aSymbol = allTokens[a].symbol.toLowerCase()
           const bSymbol = allTokens[b].symbol.toLowerCase()
 
+          // pin ETH to top
           if (aSymbol === 'ETH'.toLowerCase() || bSymbol === 'ETH'.toLowerCase()) {
             return aSymbol === bSymbol ? 0 : aSymbol === 'ETH'.toLowerCase() ? -1 : 1
           }
 
+          // then tokens with balance
           if (usdAmounts[a] && !usdAmounts[b]) {
             return -1
           } else if (usdAmounts[b] && !usdAmounts[a]) {
             return 1
           }
 
-        // check for balance - sort by value
+          // sort by balance
           if (usdAmounts[a] && usdAmounts[b]) {
             const aUSD = usdAmounts[a]
             const bUSD = usdAmounts[b]
@@ -511,7 +514,11 @@ function CurrencySelectModal({ isOpen, onDismiss, onTokenSelect }) {
             return aUSD.gt(bUSD) ? -1 : aUSD.lt(bUSD) ? 1 : 0
           }
 
+          // sort alphabetically
           return aSymbol < bSymbol ? -1 : aSymbol > bSymbol ? 1 : 0
+        } else {
+          return 0
+        }
       })
       .map(k => {
         let balance