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/src/screens/exchange/widgets/exchange_card.dart

@@ -511,17 +511,16 @@ class ExchangeCardState extends State<ExchangeCard> {
 
   void _presentPicker(BuildContext context) {
     showPopUp<void>(
-        builder: (_) => CurrencyPicker(
-            selectedAtIndex: widget.currencies.indexOf(_selectedCurrency),
-            items: widget.currencies,
-            hintText: S.of(context).search_currency,
-            isMoneroWallet: _isMoneroWallet,
-            isConvertFrom: widget.hasRefundAddress,
-            onItemSelected: (Currency item) =>
-                widget.onCurrencySelected != null
-                    ? widget.onCurrencySelected(item as CryptoCurrency)
-                    : null),
-        context: context);
+      context: context,
+      builder: (_) => CurrencyPicker(
+        selectedAtIndex: widget.currencies.indexOf(_selectedCurrency),
+        items: widget.currencies,
+        hintText: S.of(context).search_currency,
+        isMoneroWallet: _isMoneroWallet,
+        isConvertFrom: widget.hasRefundAddress,
+        onItemSelected: (Currency item) => widget.onCurrencySelected(item as CryptoCurrency),
+      ),
+    );
   }
 
   void _showAmountPopup(BuildContext context, PaymentRequest paymentRequest) {