Fix sending erc20

fix block explorer issue

cw_ethereum/lib/ethereum_wallet.dart

@@ -175,6 +175,9 @@ abstract class EthereumWalletBase
       gas: _priorityFees[_credentials.priority!.raw],
       priority: _credentials.priority!,
       currency: _credentials.currency,
+      contractAddress: _credentials.currency is Erc20Token
+          ? (_credentials.currency as Erc20Token).contractAddress
+          : null,
     );
 
     return pendingEthereumTransaction;

lib/core/address_validator.dart

@@ -2,6 +2,7 @@ import 'package:bitcoin_flutter/bitcoin_flutter.dart' as bitcoin;
 import 'package:cake_wallet/generated/i18n.dart';
 import 'package:cake_wallet/core/validator.dart';
 import 'package:cw_core/crypto_currency.dart';
+import 'package:cw_core/erc20_token.dart';
 
 class AddressValidator extends TextValidator {
   AddressValidator({required CryptoCurrency type})
@@ -14,6 +15,9 @@ class AddressValidator extends TextValidator {
             length: getLength(type));
 
   static String getPattern(CryptoCurrency type) {
+    if (type is Erc20Token) {
+      return '0x[0-9a-zA-Z]';
+    }
     switch (type) {
       case CryptoCurrency.xmr:
         return '^4[0-9a-zA-Z]{94}\$|^8[0-9a-zA-Z]{94}\$|^[0-9a-zA-Z]{106}\$';
@@ -117,17 +121,14 @@ class AddressValidator extends TextValidator {
   }
 
   static List<int>? getLength(CryptoCurrency type) {
+    if (type is Erc20Token) {
+      return [42];
+    }
     switch (type) {
       case CryptoCurrency.xmr:
         return null;
       case CryptoCurrency.ada:
         return null;
-      case CryptoCurrency.avaxc:
-        return [42];
-      case CryptoCurrency.bch:
-        return [42];
-      case CryptoCurrency.bnb:
-        return [42];
       case CryptoCurrency.btc:
         return null;
       case CryptoCurrency.dash:
@@ -168,6 +169,9 @@ class AddressValidator extends TextValidator {
       case CryptoCurrency.dydx:
       case CryptoCurrency.steth:
       case CryptoCurrency.shib:
+      case CryptoCurrency.avaxc:
+      case CryptoCurrency.bch:
+      case CryptoCurrency.bnb:
         return [42];
       case CryptoCurrency.ltc:
         return [34, 43, 63];
@@ -205,11 +209,8 @@ class AddressValidator extends TextValidator {
       case CryptoCurrency.xusd:
         return [98, 99, 106];
       case CryptoCurrency.btt:
-        return [34];
       case CryptoCurrency.bttc:
-        return [34];
       case CryptoCurrency.doge:
-        return [34];
       case CryptoCurrency.firo:
         return [34];
       case CryptoCurrency.hbar:
@@ -260,6 +261,8 @@ class AddressValidator extends TextValidator {
         return '([^0-9a-zA-Z]|^)^L[a-zA-Z0-9]{26,33}([^0-9a-zA-Z]|\$)'
             '|([^0-9a-zA-Z]|^)[LM][a-km-zA-HJ-NP-Z1-9]{26,33}([^0-9a-zA-Z]|\$)'
             '|([^0-9a-zA-Z]|^)ltc[a-zA-Z0-9]{26,45}([^0-9a-zA-Z]|\$)';
+      case CryptoCurrency.eth:
+        return '0x[0-9a-zA-Z]{42}';
       default:
         return null;
     }

lib/view_model/transaction_details_view_model.dart

@@ -114,6 +114,8 @@ abstract class TransactionDetailsViewModelBase with Store {
         return 'https://blockchair.com/litecoin/transaction/${txId}';
       case WalletType.haven:
         return 'https://explorer.havenprotocol.org/search?value=${txId}';
+      case WalletType.ethereum:
+        return 'https://etherscan.io/tx/${txId}';
       default:
         return '';
     }
@@ -129,6 +131,8 @@ abstract class TransactionDetailsViewModelBase with Store {
         return S.current.view_transaction_on + 'Blockchair.com';
       case WalletType.haven:
         return S.current.view_transaction_on + 'explorer.havenprotocol.org';
+      case WalletType.ethereum:
+        return S.current.view_transaction_on + 'etherscan.io';
       default:
         return '';
     }