Add new section with translation and refactoring of the old code.

Trust/Core/Formatters/CurrencyFormatter.swift

@@ -5,10 +5,10 @@ import Foundation
 class CurrencyFormatter {
     static var formatter: NumberFormatter {
         let formatter = NumberFormatter()
-        //TODO: use current locale when available this feature
-        formatter.locale = Locale(identifier: "en_US")
+       
         formatter.minimumFractionDigits = 2
         formatter.maximumFractionDigits = 2
+        formatter.currencyCode = Config().currency.rawValue
         formatter.numberStyle = .currency
         return formatter
     }

Trust/EtherClient/CoinMarket/CoinMarketClient.swift

@@ -3,10 +3,6 @@
 import Foundation
 import Moya
 
-enum Currency: String {
-    case USD
-}
-
 enum TrustMarketService {
     case prices(currency: Currency, symbols: [String])
 }

Trust/Localization/en.lproj/Localizable.strings

@@ -62,6 +62,7 @@
 "settings.feedback.email.title" = "Trust Feedback";
 "settings.navigation.title" = "Settings";
 "settings.network.button.title" = "Network";
+"settings.currency.button.title" = "Currency";
 "settings.openSourceDevelopment.label.title" = "Open Source Development";
 "settings.privacyPolicy.button.title" = "Privacy Policy";
 "settings.pushNotifications.button.title" = "Push Notifications";

Trust/Localization/es.lproj/Localizable.strings

@@ -62,6 +62,7 @@
 "settings.feedback.email.title" = "Comentarios sobre Trust";
 "settings.navigation.title" = "Configuración";
 "settings.network.button.title" = "Red";
+"settings.currency.button.title" = "Moneda";
 "settings.openSourceDevelopment.label.title" = "Desarrollo en abierto";
 "settings.privacyPolicy.button.title" = "Política de privacidad";
 "settings.pushNotifications.button.title" = "Notificaciones Push";

Trust/Localization/ru.lproj/Localizable.strings

@@ -63,6 +63,7 @@
 "settings.feedback.email.title" = "Trust - Обратная связь ";
 "settings.navigation.title" = "Настройки";
 "settings.network.button.title" = "Сеть";
+"settings.currency.button.title" = "Валюта";
 "settings.openSourceDevelopment.label.title" = "Разработка с открытым исходным кодом";
 "settings.privacyPolicy.button.title" = "Политика Конфиденциальности";
 "settings.pushNotifications.button.title" = "Push-Уведомления";

Trust/Settings/Coordinators/ExchangeRateCoordinator.swift

@@ -19,7 +19,7 @@ class ExchangeRateCoordinator: NSObject {
     }
     
     func fetch() {
-        provider.request(.prices(currency: .USD, symbols:["ETH"])) { (result) in
+        provider.request(.prices(currency: Config().currency, symbols:["ETH"])) { (result) in
             guard  case .success(let response) = result else { return }
             do {
                 guard let ticker = try response.map([CoinTicker].self, atKeyPath: "response", using: JSONDecoder()).first else { return }

Trust/Settings/Coordinators/SettingsCoordinator.swift

@@ -62,6 +62,7 @@ extension SettingsCoordinator: SettingsViewControllerDelegate {
         case .wallets:
             showAccounts()
         case .RPCServer: break
+        case .currency: break
         case .donate: break
         case .pushNotifications(let enabled):
             switch enabled {

Trust/Settings/Types/SettingsAction.swift

@@ -5,6 +5,7 @@ import Foundation
 enum SettingsAction {
     case wallets
     case RPCServer
+    case currency
     case donate(address: Address)
     case pushNotifications(enabled: Bool)
 }

Trust/Settings/ViewControllers/SettingsViewController.swift

@@ -77,6 +77,24 @@ class SettingsViewController: FormViewController {
             }.cellSetup { cell, _ in
                 cell.imageView?.image = R.image.settings_server()
             }
+            
+            +++ Section(NSLocalizedString("settings.currency.button.title", value: "Currency", comment: ""))
+            
+            <<< PushRow<String> {
+                $0.title = NSLocalizedString("settings.currency.button.title", value: "Currency", comment: "")
+                $0.options = viewModel.currency
+                $0.value = config.currency.rawValue
+                $0.displayValueFor = { value in
+                    return value
+                }
+            }.onChange { row in
+                self.config.currency = Currency(rawValue: row.value ?? "USD")!
+                self.run(action: .currency)
+            }.onPresent { _, selectorController in
+                selectorController.enableDeselection = false
+            }.cellSetup { cell, _ in
+                cell.imageView?.image = R.image.settings_server()
+            }
 
             <<< AppFormAppearance.button { button in
                 button.cellStyle = .value1

Trust/Settings/ViewModels/SettingsViewModel.swift

@@ -20,6 +20,10 @@ struct SettingsViewModel {
             RPCServer.ropsten,
         ]
     }
+    
+    var currency: [String] {
+        return Currency.allValues.map{$0.rawValue}.sorted()
+    }
 
     var passcodeTitle: String {
         switch BiometryAuthenticationType.current {

Trust/Tokens/Types/TokensDataStore.swift

@@ -154,7 +154,7 @@ class TokensDataStore {
     func updatePrices() {
         var symbols = objects.map { $0.symbol }
         symbols.append("ETH")
-        provider.request(.prices(currency: .USD, symbols: symbols)) { result in
+        provider.request(.prices(currency: Config().currency, symbols: symbols)) { result in
             guard  case .success(let response) = result else { return }
             do {
                 let tickers = try response.map([CoinTicker].self, atKeyPath: "response", using: JSONDecoder())