Cw 657 new buy sell flow (#1553)

* init commit

* onramper

* moonPay

* dfx provider

* meld

* dfx payment methods

* fiat buy credentials

* moonpay payment method

* payment loading state

* dfx sell quote

* onramper launch trade

* meld launch trade

* country picker

* update option tile

* buy/sell action

* meld refactor

* update pr_test_build.yml

* ui fixes

* revert country picker commit

* update the ui

* recommended providers

* payment method [skip ci]

* provider option tile

* remove buy action

* minor fixes

* update the best rate when the amount is changed

* fixes for currency title

* fix icons

* code refactoring

* null issue

* code review fixes

* Update pr_test_build_linux.yml

* Update meld_buy_provider.dart

* Update meld_buy_provider.dart

* add show wallets action

* remove default sell / buy provider setting

* localisation

* providerTypes

* icons

* remove duplicate file [skip ci]

* minor changes [skip ci]

* fixes from review

* disable dfx for non eur/chf currencies
fix providers to be fetched with the selected currency

* fix breaking from loop if one element failed

* fix minor naming issue from merging conflicts

* add fiat check for moonpay

* fix address validation

* merge conflict

* fix destination and source currency

* minor fix

* minor fix

* update the flow

* fix bch address format

* fix wallet addresses

* fix initial fetching amount.

* Update address_validator.dart

* review comments

* revert switch case to return null

* minor fix

---------

Co-authored-by: OmarHatem <[email protected]>

.github/workflows/pr_test_build_android.yml

@@ -194,6 +194,8 @@ jobs:
           echo "const nanoNowNodesApiKey = '${{ secrets.NANO_NOW_NODES_API_KEY }}';" >> cw_nano/lib/.secrets.g.dart
           echo "const tronGridApiKey = '${{ secrets.TRON_GRID_API_KEY }}';" >> cw_tron/lib/.secrets.g.dart
           echo "const tronNowNodesApiKey = '${{ secrets.TRON_NOW_NODES_API_KEY }}';" >> cw_tron/lib/.secrets.g.dart
+          echo "const meldTestApiKey = '${{ secrets.MELD_TEST_API_KEY }}';" >> lib/.secrets.g.dart
+          echo "const meldTestPublicKey = '${{ secrets.MELD_TEST_PUBLIC_KEY}}';" >> lib/.secrets.g.dar
           echo "const letsExchangeBearerToken = '${{ secrets.LETS_EXCHANGE_TOKEN }}';" >> lib/.secrets.g.dart
           echo "const letsExchangeAffiliateId = '${{ secrets.LETS_EXCHANGE_AFFILIATE_ID }}';" >> lib/.secrets.g.dart
           echo "const stealthExBearerToken = '${{ secrets.STEALTH_EX_BEARER_TOKEN }}';" >> lib/.secrets.g.dart

.github/workflows/pr_test_build_linux.yml

@@ -175,6 +175,8 @@ jobs:
           echo "const nanoNowNodesApiKey = '${{ secrets.NANO_NOW_NODES_API_KEY }}';" >> cw_nano/lib/.secrets.g.dart
           echo "const tronGridApiKey = '${{ secrets.TRON_GRID_API_KEY }}';" >> cw_tron/lib/.secrets.g.dart
           echo "const tronNowNodesApiKey = '${{ secrets.TRON_NOW_NODES_API_KEY }}';" >> cw_tron/lib/.secrets.g.dart
+          echo "const meldTestApiKey = '${{ secrets.MELD_TEST_API_KEY }}';" >> lib/.secrets.g.dart
+          echo "const meldTestPublicKey = '${{ secrets.MELD_TEST_PUBLIC_KEY}}';" >> lib/.secrets.g.dar
           echo "const letsExchangeBearerToken = '${{ secrets.LETS_EXCHANGE_TOKEN }}';" >> lib/.secrets.g.dart
           echo "const letsExchangeAffiliateId = '${{ secrets.LETS_EXCHANGE_AFFILIATE_ID }}';" >> lib/.secrets.g.dart
           echo "const stealthExBearerToken = '${{ secrets.STEALTH_EX_BEARER_TOKEN }}';" >> lib/.secrets.g.dart