Add btcln; add 2 assets to SideShift (#890)

* Add btcln; add 2 assets to SideShift

* fix regex line

* change ordering

lib/core/address_validator.dart

@@ -85,6 +85,8 @@ class AddressValidator extends TextValidator {
         return 'R[0-9a-zA-Z]{33}';
       case CryptoCurrency.pivx:
         return 'D([1-9a-km-zA-HJ-NP-Z]){33}';
+      case CryptoCurrency.btcln:
+        return '^(lnbc|LNBC)([0-9]{1,}[a-zA-Z0-9]+)';
       default:
         return '[0-9a-zA-Z]';
     }
@@ -194,6 +196,8 @@ class AddressValidator extends TextValidator {
         return [45];
       case CryptoCurrency.near:
         return [64];
+      case CryptoCurrency.btcln:
+        return null;
       default:
         return [];
     }

lib/exchange/sideshift/sideshift_exchange_provider.dart

@@ -29,9 +29,7 @@ class SideShiftExchangeProvider extends ExchangeProvider {
     CryptoCurrency.dcr,
     CryptoCurrency.kmd,
     CryptoCurrency.mkr,
-    CryptoCurrency.near,
     CryptoCurrency.oxt,
-    CryptoCurrency.paxg,
     CryptoCurrency.pivx,
     CryptoCurrency.rune,
     CryptoCurrency.rvn,
@@ -300,6 +298,8 @@ class SideShiftExchangeProvider extends ExchangeProvider {
         return 'usdcsol';
       case CryptoCurrency.maticpoly:
         return 'polygon';
+      case CryptoCurrency.btcln:
+        return 'ln';
       default:
         return currency.title.toLowerCase();
     }

lib/exchange/trocador/trocador_exchange_provider.dart

@@ -285,6 +285,8 @@ class TrocadorExchangeProvider extends ExchangeProvider {
         return 'ERC20';
       case 'TRX':
         return 'TRC20';
+      case 'LN':
+        return 'Lightning';
       default:
         return tag.toLowerCase();
     }