move FiatConversionService to newer charts api

lib/core/fiat_conversion_service.dart

@@ -1,48 +1,6 @@
-import 'package:cw_core/utils/print_verbose.dart';
-import 'package:cw_core/utils/proxy_wrapper.dart';
+import "package:cake_wallet/new-ui/model/charts/price_api_client.dart";
 import 'package:cw_core/crypto_currency.dart';
 import 'package:cake_wallet/entities/fiat_currency.dart';
-import 'dart:convert';
-import 'package:cake_wallet/.secrets.g.dart' as secrets;
-
-const _fiatApiClearNetAuthority = 'prices.cakewallet.com';
-const _fiatApiOnionAuthority = '46wisoe2uwipcj2j4og6smiq7hbmj34fkkrquwlzbbsqtgat7bf3erid.onion';
-const _fiatApiPath = '/v2/rates';
-
-Future<double> _fetchPrice(String crypto, String fiat, bool torOnly) async {
-  final Map<String, String> queryParams = {
-    'interval_count': '1',
-    'base': crypto.split(".").first,
-    'quote': fiat,
-  };
-
-  num price = 0.0;
-
-  try {
-    final onionUri = Uri.http(_fiatApiOnionAuthority, _fiatApiPath, queryParams);
-    final clearnetUri = Uri.https(_fiatApiClearNetAuthority, _fiatApiPath, queryParams);
-
-    final response = await ProxyWrapper()
-        .get(onionUri: onionUri, clearnetUri: torOnly ? onionUri : clearnetUri, headers: {
-      "x-api-key": secrets.fiatApiKey,
-    });
-
-    if (response.statusCode != 200) {
-      return 0.0;
-    }
-
-    final responseJSON = json.decode(response.body) as Map<String, dynamic>;
-    final results = responseJSON['results'] as Map<String, dynamic>;
-
-    if (results.isNotEmpty) {
-      price = results.values.first as num;
-    }
-
-    return price.toDouble();
-  } catch (e) {
-    return price.toDouble();
-  }
-}
 
 /// Override specific [CryptoCurrency] to fix its price to the price of another
 /// e.g. nDEPS should have the same price as DEPS, but only DEPS is tracked
@@ -57,5 +15,14 @@ class FiatConversionService {
     required FiatCurrency fiat,
     required bool torOnly,
   }) async =>
-      await _fetchPrice(_overrideCryptoCurrency(crypto).toString(), fiat.toString(), torOnly);
+      double.parse((await PriceApiClient.getLatestPrice(
+            LatestPriceRequest(
+              from: _overrideCryptoCurrency(crypto),
+              to: fiat,
+            ),
+            torOnly: torOnly,
+          ))
+              ?.quote
+              .toString() ??
+          "0");
 }

lib/new-ui/model/charts/price_api_client.dart

@@ -9,6 +9,21 @@ import "package:cw_core/utils/print_verbose.dart";
 import "package:cw_core/utils/proxy_wrapper.dart";
 
 const priceApiHost = "prices.cakewallet.com";
+const priceApiHostOnion = "46wisoe2uwipcj2j4og6smiq7hbmj34fkkrquwlzbbsqtgat7bf3erid.onion";
+
+class LatestPriceRequest {
+  LatestPriceRequest({required this.from, required this.to});
+
+  final Currency from;
+  final Currency to;
+
+  Uri get uri => Uri.https(priceApiHost, "/v3/rates", {
+        "base": from.apiString,
+        "quote": to.apiString,
+      });
+
+  Uri get onionUri => Uri.https(priceApiHostOnion, uri.path, uri.queryParameters);
+}
 
 class PriceRequest {
   const PriceRequest({
@@ -33,6 +48,8 @@ class PriceRequest {
         "quote": from.apiString,
         "base": to.apiString,
       });
+
+  Uri get onionUri => Uri.https(priceApiHostOnion, uri.path, uri.queryParameters);
 }
 
 class PriceApiClient {
@@ -51,10 +68,10 @@ class PriceApiClient {
     }
   }
 
-  static Future<List<PriceData>> getPrices(PriceRequest request) async {
+  static Future<List<PriceData>> getPrices(PriceRequest request, {bool torOnly = false}) async {
     final List<PriceData> ret = [];
     printV(request.uri);
-    final data = await _getJson(request.uri);
+    final data = await _getJson(torOnly ? request.onionUri : request.uri);
     if (data == null) {
       return [];
     }
@@ -75,4 +92,24 @@ class PriceApiClient {
     }
     return ret;
   }
+
+  static Future<PriceData?> getLatestPrice(
+    LatestPriceRequest request, {
+    bool torOnly = false,
+  }) async {
+    final data = await _getJson(torOnly ? request.onionUri : request.uri);
+    if (data == null) {
+      return null;
+    }
+    final results = data["results"] as Map<String, dynamic>?;
+    if (results == null) {
+      return null;
+    }
+    final result = results[results.keys.first];
+    return PriceData(
+      time: DateTime.now(),
+      base: request.from,
+      quote: Money.parse((result as num).toString(), request.to, strictParsing: false),
+    );
+  }
 }