Cw 78 ethereum (#862)

* Add initial flow for ethereum

* Add initial create Eth wallet flow

* Complete Ethereum wallet creation flow

* Fix web3dart versioning issue

* Add primary receive address extracted from private key

* Implement open wallet functionality

* Implement restore wallet from seed functionality

* Fixate web3dart version as higher versions cause some issues

* Add Initial Transaction priorities for eth
Add estimated gas price

* Rename priority value to tip

* Re-order wallet types

* Change ethereum node
Fix connection issues

* Fix estimating gas for priority

* Add case for ethereum to fetch it's seeds

* Add case for ethereum to request node

* Fix Exchange screen initial pairs

* Add initial send transaction flow

* Add missing configure for ethereum class

* Add Eth address initial setup

* Fix Private key for Ethereum wallets

* Change sign/send transaction flow

* - Fix Conflicts with main
- Remove unused function from Haven configure.dart

* Add build command for ethereum package

* Add missing Node list file to pubspec

* - Fix balance display
- Fix parsing of Ethereum amount
- Add more Ethereum Nodes 

* - Fix extracting Ethereum Private key from seeds
- Integrate signing/sending transaction with the send view model

* - Update and Fix Conflicts with main

* Add Balances for ERC20 tokens

* Fix conflicts with main

* Add erc20 abi json

* Add send erc20 tokens initial function

* add missing getHeightByDate in Haven

* Allow contacts and wallets from the same tag

* Add Shiba Inu icon

* Add send ERC-20 tokens initial flow

* Add missing import in generated file

* Add initial approach for transaction sending for ERC-20 tokens

* Refactor signing/sending transactions

* Add initial flow for transactions subscription

* Refactor signing/sending transactions

* Add home settings icon

* Fix conflicts with main

* Initial flow for home settings

* Add logic flow for adding erc20 tokens

* Fix initial UI

* Finalize UI for Tokens

* Integrate UI with Ethereum flow

* Add "Enable/Disable" feature for ERC20 tokens

* Add initial Erc20 tokens

* Add Sorting and Pin Native Token features

* Fix price sorting

* Sort tokens list as well when Sort criteria changes

* - Improve sorting balances flow
- Add initial add token from search bar flow

* Fix Accounts Popup UI

* Fix Pin native token

* Fix Enabling/Disabling tokens
Fix sorting by fiat once app is opened
Improve token availability mechanism

* Fix deleting token
Fix renaming tokens

* Fix issue with search

* Add more tokens

* - Fix scroll issue
- Add ERC20 tokens placeholder image in picker

* - Separate and organize default erc20 tokens
- Fix scrolling
- Add token placeholder images in picker
- Sort disabled tokens alphabetically

* Change BNB token initial availability

* Fix Conflicts with main

* Fix Conflicts with main

* Add Verse ERC20 token to the initial tokens list

* Add rename wallet to Ethereum

* Integrate EtherScan API for fetching address transactions
Generate Ethereum specific secrets in Ethereum package

* Adjust transactions fiat price for ERC20 tokens

* Free Up GitHub Actions Ubuntu Runner Disk Space

* Free Up GitHub Actions Ubuntu Runner Disk space (trial 2)

* Fix Transaction Fee display

* Save transaction history

* Enhance loading time for erc20 tokens transactions

* Minor Fixes and Enhancements

* Fix sending erc20
fix block explorer issue

* Fix int overflow

* Fix transaction amount conversions

* Minor: `slow` -> `Slow` 

* Update build guide

* Fix fetching fiat rate taking a lot of time by only fetching enabled tokens only and making the API calls in parallel not sequential

* Update transactions on a periodic basis

* For fee, use ETH spot price, not ERC-20 spot price

* Add Etherscan History privacy option to enable/disable Etherscan API

* Show estimated fee amounts in the send screen

* fix send fiat fields parsing issue

* Fix transactions estimated fee less than actual fee

* handle balance sorting when balance is disabled
Handle empty transactions list

* Fix Delete Ethereum wallet
Fix balance < 0.01

* Fix Decimal place for Ethereum amount
Fix sending amount issue

* Change words count

* Remove balance hint and Full balance row from Ethereum wallets

* support changing the asset type in send templates

* Fix Templates for ERC tokens issues

* Fix conflicts in send templates

* Disable batch sending in Ethereum

* Fix Fee calculation with different priorities

* Fix Conflicts with main

* Add offline error to ignored exceptions

---------

Co-authored-by: Justin Ehrenhofer <justin.ehrenhofer@gmail.com>

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}\$';
@@ -56,6 +60,7 @@ class AddressValidator extends TextValidator {
       case CryptoCurrency.zrx:
       case CryptoCurrency.dydx:
       case CryptoCurrency.steth:
+      case CryptoCurrency.shib:
         return '0x[0-9a-zA-Z]';
       case CryptoCurrency.xrp:
         return '^[0-9a-zA-Z]{34}\$|^X[0-9a-zA-Z]{46}\$';
@@ -116,17 +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:
@@ -166,6 +168,10 @@ class AddressValidator extends TextValidator {
       case CryptoCurrency.zrx:
       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];
@@ -203,11 +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:
@@ -258,6 +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/core/backup_service.dart

@@ -240,6 +240,9 @@ class BackupService {
         data[PreferencesKey.shouldRequireTOTP2FAForCreatingNewWallets] as bool?;
     final shouldRequireTOTP2FAForAllSecurityAndBackupSettings =
         data[PreferencesKey.shouldRequireTOTP2FAForAllSecurityAndBackupSettings] as bool?;
+    final sortBalanceTokensBy = data[PreferencesKey.sortBalanceBy] as int?;
+    final pinNativeTokenAtTop = data[PreferencesKey.pinNativeTokenAtTop] as bool?;
+    final useEtherscan = data[PreferencesKey.useEtherscan] as bool?;
 
     await _sharedPreferences.setString(PreferencesKey.currentWalletName, currentWalletName);
 
@@ -349,6 +352,15 @@ class BackupService {
           PreferencesKey.shouldRequireTOTP2FAForAllSecurityAndBackupSettings,
           shouldRequireTOTP2FAForAllSecurityAndBackupSettings);
 
+    if (sortBalanceTokensBy != null)
+      await _sharedPreferences.setInt(PreferencesKey.sortBalanceBy, sortBalanceTokensBy);
+
+    if (pinNativeTokenAtTop != null)
+      await _sharedPreferences.setBool(PreferencesKey.pinNativeTokenAtTop, pinNativeTokenAtTop);
+
+    if (useEtherscan != null)
+      await _sharedPreferences.setBool(PreferencesKey.useEtherscan, useEtherscan);
+
     await preferencesFile.delete();
   }
 
@@ -492,6 +504,12 @@ class BackupService {
           _sharedPreferences.getBool(PreferencesKey.shouldRequireTOTP2FAForCreatingNewWallets),
       PreferencesKey.shouldRequireTOTP2FAForAllSecurityAndBackupSettings: _sharedPreferences
           .getBool(PreferencesKey.shouldRequireTOTP2FAForAllSecurityAndBackupSettings),
+      PreferencesKey.sortBalanceBy:
+          _sharedPreferences.getInt(PreferencesKey.sortBalanceBy),
+      PreferencesKey.pinNativeTokenAtTop:
+          _sharedPreferences.getBool(PreferencesKey.pinNativeTokenAtTop),
+      PreferencesKey.useEtherscan:
+          _sharedPreferences.getBool(PreferencesKey.useEtherscan),
     };
 
     return json.encode(preferences);

lib/core/fiat_conversion_service.dart

@@ -5,21 +5,20 @@ import 'package:flutter/foundation.dart';
 import 'package:http/http.dart';
 import 'package:cake_wallet/.secrets.g.dart' as secrets;
 
-
 const _fiatApiClearNetAuthority = 'fiat-api.cakewallet.com';
 const _fiatApiOnionAuthority = 'n4z7bdcmwk2oyddxvzaap3x2peqcplh3pzdy7tpkk5ejz5n4mhfvoxqd.onion';
 const _fiatApiPath = '/v2/rates';
 
 Future<double> _fetchPrice(Map<String, dynamic> args) async {
-  final crypto = args['crypto'] as CryptoCurrency;
-  final fiat = args['fiat'] as FiatCurrency;
+  final crypto = args['crypto'] as String;
+  final fiat = args['fiat'] as String;
   final torOnly = args['torOnly'] as bool;
 
   final Map<String, String> queryParams = {
     'interval_count': '1',
-    'base': crypto.toString(),
-    'quote': fiat.toString(),
-    'key' : secrets.fiatApiKey,
+    'base': crypto,
+    'quote': fiat,
+    'key': secrets.fiatApiKey,
   };
 
   double price = 0.0;
@@ -52,7 +51,11 @@ Future<double> _fetchPrice(Map<String, dynamic> args) async {
 }
 
 Future<double> _fetchPriceAsync(CryptoCurrency crypto, FiatCurrency fiat, bool torOnly) async =>
-    compute(_fetchPrice, {'fiat': fiat, 'crypto': crypto, 'torOnly': torOnly});
+    compute(_fetchPrice, {
+      'fiat': fiat.toString(),
+      'crypto': crypto.toString(),
+      'torOnly': torOnly,
+    });
 
 class FiatConversionService {
   static Future<double> fetchPrice({

lib/core/seed_validator.dart

@@ -1,4 +1,5 @@
 import 'package:cake_wallet/bitcoin/bitcoin.dart';
+import 'package:cake_wallet/ethereum/ethereum.dart';
 import 'package:cake_wallet/haven/haven.dart';
 import 'package:cake_wallet/core/validator.dart';
 import 'package:cake_wallet/entities/mnemonic_item.dart';
@@ -25,6 +26,8 @@ class SeedValidator extends Validator<MnemonicItem> {
         return monero!.getMoneroWordList(language);
       case WalletType.haven:
         return haven!.getMoneroWordList(language);
+      case WalletType.ethereum:
+        return ethereum!.getEthereumWordList(language);
       default:
         return [];
     }