get coin images for coins we support

lib/pages/buy_view/sub_widgets/crypto_selection_view.dart

@@ -208,8 +208,7 @@ class _CryptoSelectionViewState extends State<CryptoSelectionView> {
                                         placeholderBuilder: (_) =>
                                             const LoadingIndicator(),
                                       )
-                                  : null,
+                                    : getIconForTicker(_coins[index].ticker)),
-                            ),
                             const SizedBox(
                               width: 10,
                             ),
@@ -250,3 +249,16 @@ class _CryptoSelectionViewState extends State<CryptoSelectionView> {
     );
   }
 }
+
+Widget? getIconForTicker(String ticker) {
+  print(ticker);
+  if (!isCoinSupportedByTicker(ticker)) {
+    return null;
+  }
+  Coin? coin = coinFromTickerCaseInsensitive(ticker);
+  String iconAsset = Assets.svg.iconFor(coin: coin);
+  if (iconAsset != null) {
+    return SvgPicture.asset(iconAsset, height: 20, width: 20);
+  }
+  return null;
+}

lib/utilities/enums/coin_enum.dart

@@ -330,3 +330,29 @@ Coin coinFromTickerCaseInsensitive(String ticker) {
           ticker, "name", "No Coin enum value with that ticker");
   }
 }
+
+// This was added for the Buy view.I would use coinFromTickerCaseInsensitive
+// however I need it to return null or something else to indicate failure
+// instead of throwing an exception
+bool isCoinSupportedByTicker(String ticker) {
+  switch (ticker.toLowerCase()) {
+    case "btc":
+    case "ltc":
+    case "bch":
+    case "doge":
+    case "epic":
+    case "firo":
+    case "xmr":
+    case "nmc":
+    case "part":
+    case "tltc":
+    case "tbtc":
+    case "tbch":
+    case "tfiro":
+    case "tdoge":
+    case "wow":
+      return true;
+    default:
+      return false;
+  }
+}