CWA-199 | changed possibility to enter amount in the deposit card only (exchange page); changed request for XMRTOExchangeProvider in the createTrade() (exchange_store); fixed calculation limits for XMR in the fetchLimits(), fixed post body in the createTrade() (xmrto_exchange_provider); created limits_format

lib/src/domain/exchange/limits_format.dart

@@ -0,0 +1,7 @@
+import 'package:intl/intl.dart';
+
+final amountFormat = NumberFormat()
+  ..maximumFractionDigits = 3
+  ..minimumFractionDigits = 1;
+
+double limitsFormat(double limit) => double.parse(amountFormat.format(limit));

lib/src/domain/exchange/xmrto/xmrto_exchange_provider.dart

@@ -12,6 +12,7 @@ import 'package:cake_wallet/src/domain/exchange/xmrto/xmrto_trade_request.dart';
 import 'package:cake_wallet/src/domain/exchange/trade_not_created_exeption.dart';
 import 'package:cake_wallet/src/domain/exchange/exchange_provider_description.dart';
 import 'package:cake_wallet/src/domain/exchange/trade_not_found_exeption.dart';
+import 'package:cake_wallet/src/domain/exchange/limits_format.dart';
 
 class XMRTOExchangeProvider extends ExchangeProvider {
   XMRTOExchangeProvider()
@@ -54,14 +55,31 @@ class XMRTOExchangeProvider extends ExchangeProvider {
   Future<Limits> fetchLimits({CryptoCurrency from, CryptoCurrency to}) async {
     final url = await getApiUri() + _orderParameterUriSufix;
     final response = await get(url);
+    final correction = 0.001;
 
     if (response.statusCode != 200) {
       return Limits(min: 0, max: 0);
     }
 
     final responseJSON = json.decode(response.body) as Map<String, dynamic>;
-    final min = responseJSON['lower_limit'] as double;
+    double min = responseJSON['lower_limit'] as double;
-    final max = responseJSON['upper_limit'] as double;
+    double max = responseJSON['upper_limit'] as double;
+    final price = responseJSON['price'] as double;
+
+    if (price > 0) {
+      try {
+        min /= price;
+        min = limitsFormat(min) + correction;
+        max /= price;
+        max = limitsFormat(max);
+      } catch (e) {
+        min = 0;
+        max = 0;
+      }
+    } else {
+      min = 0;
+      max = 0;
+    }
 
     return Limits(min: min, max: max);
   }
@@ -71,7 +89,7 @@ class XMRTOExchangeProvider extends ExchangeProvider {
     final _request = request as XMRTOTradeRequest;
     final url = await getApiUri() + _orderCreateUriSufix;
     final body = {
-      'btc_amount': _request.amount,
+      'xmr_amount': _request.amount,
       'btc_dest_address': _request.address
     };
     final response = await post(url,
@@ -168,8 +186,7 @@ class XMRTOExchangeProvider extends ExchangeProvider {
       final response =
           await get(url, headers: {'Content-Type': 'application/json'});
       final responseJSON = json.decode(response.body) as Map<String, dynamic>;
-      final btcprice = responseJSON['price'] as double;
+      final price = responseJSON['price'] as double;
-      final price = 1 / btcprice;
 
       return price;
     } catch (e) {

lib/src/screens/exchange/exchange_page.dart

@@ -168,12 +168,9 @@ class ExchangeFormState extends State<ExchangeForm> {
                       exchangeStore.depositCurrency == walletStore.type
                           ? walletStore.address
                           : null,
-                  initialIsAmountEditable:
+                  initialIsAmountEditable: true,
-                      !(exchangeStore.provider is XMRTOExchangeProvider),
+                  initialIsAddressEditable: true,
-                  initialIsAddressEditable:
+                  isAmountEstimated: false,
-                      !(exchangeStore.provider is XMRTOExchangeProvider),
-                  isAmountEstimated:
-                      exchangeStore.provider is XMRTOExchangeProvider,
                   currencies: CryptoCurrency.all,
                   onCurrencySelected: (currency) =>
                       exchangeStore.changeDepositCurrency(currency: currency),
@@ -209,12 +206,9 @@ class ExchangeFormState extends State<ExchangeForm> {
                               exchangeStore.receiveCurrency == walletStore.type
                                   ? walletStore.address
                                   : null,
-                          initialIsAmountEditable:
+                          initialIsAmountEditable: false,
-                              exchangeStore.provider is XMRTOExchangeProvider,
+                          initialIsAddressEditable: true,
-                          initialIsAddressEditable:
+                          isAmountEstimated: true,
-                              exchangeStore.provider is XMRTOExchangeProvider,
-                          isAmountEstimated: !(exchangeStore.provider
-                              is XMRTOExchangeProvider),
                           currencies: CryptoCurrency.all,
                           onCurrencySelected: (currency) => exchangeStore
                               .changeReceiveCurrency(currency: currency),
@@ -321,8 +315,7 @@ class ExchangeFormState extends State<ExchangeForm> {
       final max = limitsState.limits.max != null
           ? limitsState.limits.max.toString()
           : null;
-      final key =
+      final key = depositKey;
-          store.provider is XMRTOExchangeProvider ? receiveKey : depositKey;
       key.currentState.changeLimits(min: min, max: max);
     }
 
@@ -363,22 +356,12 @@ class ExchangeFormState extends State<ExchangeForm> {
     });
 
     reaction((_) => store.provider, (ExchangeProvider provider) {
-      final isReversed = provider is XMRTOExchangeProvider;
-
-      if (isReversed) {
-        receiveKey.currentState.isAddressEditable(isEditable: true);
-        receiveKey.currentState.isAmountEditable(isEditable: true);
-        depositKey.currentState.isAddressEditable(isEditable: false);
-        depositKey.currentState.isAmountEditable(isEditable: false);
-      } else {
         receiveKey.currentState.isAddressEditable(isEditable: true);
         receiveKey.currentState.isAmountEditable(isEditable: false);
         depositKey.currentState.isAddressEditable(isEditable: true);
         depositKey.currentState.isAmountEditable(isEditable: true);
-      }
 
-      depositKey.currentState.changeIsAmountEstimated(isReversed);
+        receiveKey.currentState.changeIsAmountEstimated(true);
-      receiveKey.currentState.changeIsAmountEstimated(!isReversed);
     });
 
     reaction((_) => store.tradeState, (ExchangeTradeState state) {
@@ -406,7 +389,6 @@ class ExchangeFormState extends State<ExchangeForm> {
     });
 
     reaction((_) => store.limitsState, (LimitsState state) {
-      final isXMRTO = store.provider is XMRTOExchangeProvider;
       String min;
       String max;
 
@@ -425,13 +407,8 @@ class ExchangeFormState extends State<ExchangeForm> {
         max = '...';
       }
 
-      final depositMin = isXMRTO ? null : min;
+      depositKey.currentState.changeLimits(min: min, max: max);
-      final depositMax = isXMRTO ? null : max;
+      receiveKey.currentState.changeLimits(min: null, max: null);
-      final receiveMin = isXMRTO ? min : null;
-      final receiveMax = isXMRTO ? max : null;
-
-      depositKey.currentState.changeLimits(min: depositMin, max: depositMax);
-      receiveKey.currentState.changeLimits(min: receiveMin, max: receiveMax);
     });
 
     depositAddressController.addListener(

lib/src/stores/exchange/exchange_store.dart

@@ -157,13 +157,13 @@ abstract class ExchangeStoreBase with Store {
 
     if (provider is XMRTOExchangeProvider) {
       request = XMRTOTradeRequest(
-          to: receiveCurrency,
           from: depositCurrency,
-          amount: receiveAmount,
+          to: receiveCurrency,
+          amount: depositAmount,
           address: receiveAddress,
           refundAddress: depositAddress);
-      amount = receiveAmount;
+      amount = depositAmount;
-      currency = receiveCurrency;
+      currency = depositCurrency;
     }
 
     if (provider is ChangeNowExchangeProvider) {