Polygon-Wallet-fixes (#1222)

* fix: Fix issues surrounding polygon release

* Add polygon generation command to pubspec script

* Remove unnecesary cast

* fix: Remove unneeded code

* fix: Adjust workflow file to pick polygonScan apikey

* fix: Issues noticed while testing

* fix: Issues noticed while testing

* fix: Transaction should reflect the token name

* fix: Remove unused import

* feat: Add alchemy node to default migration settings

* Fix sending Polygon delay
Remove alchemy node
Minor Enhancements

* Remove scrolling from multiple choices settings row and make them fill the whole space [skip ci]

* Add USDT poly
Add icon for USDC.e

* Fix ERC20 tokens overriding old wallets
Add USDC.e to exchange

* - Remove unnecessary code
- Minor Enhancements

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>

cw_polygon/lib/polygon_client.dart

@@ -3,8 +3,30 @@ import 'dart:convert';
 import 'package:cw_ethereum/ethereum_client.dart';
 import 'package:cw_polygon/polygon_transaction_model.dart';
 import 'package:cw_ethereum/.secrets.g.dart' as secrets;
+import 'package:flutter/foundation.dart';
+import 'package:web3dart/web3dart.dart';
 
 class PolygonClient extends EthereumClient {
+  @override
+  Transaction createTransaction({
+    required EthereumAddress from,
+    required EthereumAddress to,
+    required EtherAmount amount,
+    EtherAmount? maxPriorityFeePerGas,
+  }) {
+    return Transaction(
+      from: from,
+      to: to,
+      value: amount,
+    );
+  }
+
+  @override
+  Uint8List prepareSignedTransactionForSending(Uint8List signedTransaction) => signedTransaction;
+
+  @override
+  int get chainId => 137;
+
   @override
   Future<List<PolygonTransactionModel>> fetchTransactions(String address,
       {String? contractAddress}) async {
@@ -27,7 +49,6 @@ class PolygonClient extends EthereumClient {
 
       return [];
     } catch (e) {
-      print(e);
       return [];
     }
   }