implemented modify order size (global and per trader)

app/src/main/java/com/example/dcav2gui/InstanceInterface.java

@@ -7,6 +7,7 @@ import android.util.Log;
 import androidx.annotation.NonNull;
 
 import com.example.dcav2gui.ui.exchanges.WorkerData;
+import com.google.gson.Gson;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
@@ -21,8 +22,10 @@ import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.CompletableFuture;
 
+import okhttp3.MediaType;
 import okhttp3.OkHttpClient;
 import okhttp3.Request;
+import okhttp3.RequestBody;
 import okhttp3.Response;
 
 
@@ -379,6 +382,45 @@ public class InstanceInterface {
         }
     }
 
+
+    public static JsonObject modDefaultOrderSize(String exchange, double newOrderSize, boolean retry) throws IOException {
+        Gson gson = new Gson();
+        JsonObject jsonPayload = new JsonObject();
+        jsonPayload.addProperty("amount", String.valueOf(newOrderSize));
+        String jsonPayloadString = gson.toJson(jsonPayload);
+
+        RequestBody requestBody = RequestBody.create(jsonPayloadString, MediaType.get("application/json; charset=utf-8"));
+        Request modDefaultOrderSizeRequest = new Request.Builder()
+                .url(API_BASE_URL + "/" + exchange + "/mod_default_order_size")
+                .header("X-API-KEY", API_KEY)
+                .post(requestBody)
+                .build();
+
+        try (Response modDefaultOrderSizeResponse = httpClient.newCall(modDefaultOrderSizeRequest).execute()) {
+            if (!modDefaultOrderSizeResponse.isSuccessful()) {
+                if (modDefaultOrderSizeResponse.code() == 503 && retry) {
+                    return modDefaultOrderSize(exchange, newOrderSize,false);
+                }
+                throw new IOException("Unexpected code " + modDefaultOrderSizeResponse);
+            }
+            String modDefaultOrderSizeResponseBody = modDefaultOrderSizeResponse.body().string();
+            JsonElement jsonElement = JsonParser.parseString(modDefaultOrderSizeResponseBody);
+            if (!jsonElement.isJsonObject()) {
+                System.err.println("The parsed JSON response is not a JsonObject.");
+                return null;
+            }
+            JsonObject jsonObject = jsonElement.getAsJsonObject();
+            if (jsonObject.has("Error")) {
+                System.err.println("The parsed JSON response contains Error");
+                return jsonObject;
+            }
+
+            //If no error, the response is {"Success": f"Success. Default order size modified to $amount}"}
+            return jsonObject;
+        }
+    }
+
+
     public static String getAllLogs(String exchange, boolean retry) throws IOException {
         //200 lines hard limit
         Request logRequest = new Request.Builder()

app/src/main/java/com/example/dcav2gui/WorkerInterface.java

@@ -694,6 +694,50 @@ public class WorkerInterface {
     }
 
 
+    public static JsonObject modOrderSize(String exchange, String pair, double newOrderSize, boolean retry) throws IOException {
+        String[] pairBaseAndQuote = pair.split("/");
+        String base = pairBaseAndQuote[0];
+        String quote = pairBaseAndQuote[1];
+
+        Gson gson = new Gson();
+        JsonObject jsonPayload = new JsonObject();
+        jsonPayload.addProperty("base", base);
+        jsonPayload.addProperty("quote", quote);
+        jsonPayload.addProperty("amount", String.valueOf(newOrderSize));
+        String jsonPayloadString = gson.toJson(jsonPayload);
+
+        RequestBody requestBody = RequestBody.create(jsonPayloadString, MediaType.get("application/json; charset=utf-8"));
+        Request modOrderSizeRequest = new Request.Builder()
+                .url(API_BASE_URL + "/" + exchange + "/mod_order_size")
+                .header("X-API-KEY", API_KEY)
+                .post(requestBody)
+                .build();
+
+        try (Response modOrderSizeResponse = httpClient.newCall(modOrderSizeRequest).execute()) {
+            if (!modOrderSizeResponse.isSuccessful()) {
+                if (modOrderSizeResponse.code() == 503 && retry) {
+                    return modOrderSize(exchange, pair, newOrderSize,false);
+                }
+                throw new IOException("Unexpected code " + modOrderSizeResponse);
+            }
+            String modOrderSizeResponseBody = modOrderSizeResponse.body().string();
+            JsonElement jsonElement = JsonParser.parseString(modOrderSizeResponseBody);
+            if (!jsonElement.isJsonObject()) {
+                System.err.println("The parsed JSON response is not a JsonObject.");
+                return null;
+            }
+            JsonObject jsonObject = jsonElement.getAsJsonObject();
+            if (jsonObject.has("Error")) {
+                System.err.println("The parsed JSON response contains Error");
+                return jsonObject;
+            }
+
+            //If no error, the response is {"Success": "Success. The change will take effect when the next deal is started"}
+            return jsonObject;
+        }
+    }
+
+
     public static JsonObject addSafetyOrders(String exchange, String pair, int amount, boolean retry) throws IOException {
         String[] pairBaseAndQuote = pair.split("/");
         String base = pairBaseAndQuote[0];
@@ -1113,6 +1157,42 @@ public class WorkerInterface {
     }
 
 
+    public static void sendModifyOrderSizeCall(String exchange, String pair, Context context) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle("Modify order size of  "+ pair);
+
+        final EditText input = new EditText(context);
+        input.setInputType(InputType.TYPE_CLASS_NUMBER);
+        input.setTextAlignment(View.TEXT_ALIGNMENT_CENTER);
+        builder.setView(input);
+
+        builder.setPositiveButton("Modify", (dialog, which) -> {
+            final double newOrderSize = Double.parseDouble(input.getText().toString());
+            new Thread(() -> {
+                try {
+                    JsonObject response = WorkerInterface.modOrderSize(exchange, pair, newOrderSize, true);
+                    new Handler(Looper.getMainLooper()).post(() -> {
+                        showToggleDialog(response, context);
+                    });
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    // Show an error dialog on the main thread
+                    new Handler(Looper.getMainLooper()).post(() -> {
+                        AlertDialog.Builder errorBuilder = new AlertDialog.Builder(context);
+                        errorBuilder.setTitle("Error");
+                        errorBuilder.setMessage("Failed to modify order size: " + e.getMessage());
+                        errorBuilder.setPositiveButton("OK", null);
+                        errorBuilder.show();
+                    });
+                }
+            }).start();
+        });
+
+        builder.setNegativeButton("Cancel", (dialog, which) -> dialog.cancel());
+        builder.show();
+    }
+
+
     public static void sendAddSafetyOrdersCall(String exchange, String pair, Context context) {
         AlertDialog.Builder builder = new AlertDialog.Builder(context);
         builder.setTitle("Add safety orders to  "+ pair);

app/src/main/java/com/example/dcav2gui/ui/exchanges/BinanceFragment.java

@@ -103,6 +103,9 @@ public class BinanceFragment extends Fragment implements WorkerCardAdapter.OnCar
                     } else if (item.getItemId() == R.id.modConcurrentSafetyOrders) {
                         WorkerInterface.sendModifyConcurrentSafetyOrdersCall("binance", pair, getContext());
                         return true;
+                    } else if (item.getItemId() == R.id.modOrderSize) {
+                        WorkerInterface.sendModifyOrderSizeCall("binance", pair, getContext());
+                        return true;
                     } else if (item.getItemId() == R.id.addSafetyOrders) {
                         WorkerInterface.sendAddSafetyOrdersCall("binance", pair, getContext());
                         return true;

app/src/main/java/com/example/dcav2gui/ui/exchanges/GateioFragment.java

@@ -100,7 +100,10 @@ public class GateioFragment extends Fragment implements WorkerCardAdapter.OnCard
                         WorkerInterface.sendSwitchQuoteCurrencyCall("gateio", pair, getContext());
                         return true;
                     } else if (item.getItemId() == R.id.modConcurrentSafetyOrders) {
-                        WorkerInterface.sendModifyConcurrentSafetyOrdersCall("binance", pair, getContext());
+                        WorkerInterface.sendModifyConcurrentSafetyOrdersCall("gateio", pair, getContext());
+                        return true;
+                    } else if (item.getItemId() == R.id.modOrderSize) {
+                        WorkerInterface.sendModifyOrderSizeCall("gateio", pair, getContext());
                         return true;
                     } else if (item.getItemId() == R.id.addSafetyOrders) {
                         WorkerInterface.sendAddSafetyOrdersCall("gateio", pair, getContext());

app/src/main/java/com/example/dcav2gui/ui/exchanges/KucoinFragment.java

@@ -100,7 +100,10 @@ public class KucoinFragment extends Fragment implements WorkerCardAdapter.OnCard
                         WorkerInterface.sendSwitchQuoteCurrencyCall("kucoin", pair, getContext());
                         return true;
                     } else if (item.getItemId() == R.id.modConcurrentSafetyOrders) {
-                        WorkerInterface.sendModifyConcurrentSafetyOrdersCall("binance", pair, getContext());
+                        WorkerInterface.sendModifyConcurrentSafetyOrdersCall("kucoin", pair, getContext());
+                        return true;
+                    } else if (item.getItemId() == R.id.modOrderSize) {
+                        WorkerInterface.sendModifyOrderSizeCall("kucoin", pair, getContext());
                         return true;
                     } else if (item.getItemId() == R.id.addSafetyOrders) {
                         WorkerInterface.sendAddSafetyOrdersCall("kucoin", pair, getContext());

app/src/main/java/com/example/dcav2gui/ui/exchanges/OkxFragment.java

@@ -100,7 +100,10 @@ public class OkxFragment extends Fragment implements WorkerCardAdapter.OnCardLon
                         WorkerInterface.sendSwitchQuoteCurrencyCall("okex", pair, getContext());
                         return true;
                     } else if (item.getItemId() == R.id.modConcurrentSafetyOrders) {
-                        WorkerInterface.sendModifyConcurrentSafetyOrdersCall("binance", pair, getContext());
+                        WorkerInterface.sendModifyConcurrentSafetyOrdersCall("okex", pair, getContext());
+                        return true;
+                    } else if (item.getItemId() == R.id.modOrderSize) {
+                        WorkerInterface.sendModifyOrderSizeCall("okex", pair, getContext());
                         return true;
                     } else if (item.getItemId() == R.id.addSafetyOrders) {
                         WorkerInterface.sendAddSafetyOrdersCall("okex", pair, getContext());

app/src/main/java/com/example/dcav2gui/ui/home/HomeFragment.java

@@ -1,13 +1,16 @@
 package com.example.dcav2gui.ui.home;
 
 import static com.example.dcav2gui.InstanceInterface.getLastNTrades;
+import static com.example.dcav2gui.WorkerInterface.showToggleDialog;
 
 import android.annotation.SuppressLint;
 import android.app.AlertDialog;
+import android.content.Context;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
+import android.text.InputType;
 import android.text.Spannable;
 import android.text.SpannableString;
 import android.text.SpannableStringBuilder;
@@ -16,6 +19,7 @@ import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.EditText;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.PopupMenu;
@@ -34,6 +38,7 @@ import com.example.dcav2gui.InstanceInterface;
 import com.example.dcav2gui.MainActivity;
 import com.example.dcav2gui.R;
 import com.example.dcav2gui.TickerTracker;
+import com.example.dcav2gui.WorkerInterface;
 import com.example.dcav2gui.ui.exchanges.adapters.WorkerCardAdapter;
 import com.google.gson.JsonObject;
 
@@ -348,6 +353,9 @@ public class HomeFragment extends Fragment {
                 } else if (item.getItemId() == R.id.exchangeMenuConfigFile) {
                     fetchExchangeConfig(exchange, true);
                     return true;
+                } else if (item.getItemId() == R.id.exchangeModDefaultOrderSize) {
+                    sendModifyDefaultOrderSizeCall(exchange, getContext());
+                    return true;
                 }
                 return false;
             }
@@ -540,6 +548,43 @@ public class HomeFragment extends Fragment {
         return shortWorkers;
     }
 
+
+    public static void sendModifyDefaultOrderSizeCall(String exchange, Context context) {
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle("Modify default order size of "+ exchange);
+
+        final EditText input = new EditText(context);
+        input.setInputType(InputType.TYPE_CLASS_NUMBER);
+        input.setTextAlignment(View.TEXT_ALIGNMENT_CENTER);
+        builder.setView(input);
+
+        builder.setPositiveButton("Modify", (dialog, which) -> {
+            final double newOrderSize = Double.parseDouble(input.getText().toString());
+            new Thread(() -> {
+                try {
+                    JsonObject response = InstanceInterface.modDefaultOrderSize(exchange, newOrderSize, true);
+                    new Handler(Looper.getMainLooper()).post(() -> {
+                        showToggleDialog(response, context);
+                    });
+                } catch (IOException e) {
+                    e.printStackTrace();
+                    // Show an error dialog on the main thread
+                    new Handler(Looper.getMainLooper()).post(() -> {
+                        AlertDialog.Builder errorBuilder = new AlertDialog.Builder(context);
+                        errorBuilder.setTitle("Error");
+                        errorBuilder.setMessage("Failed to modify default order size: " + e.getMessage());
+                        errorBuilder.setPositiveButton("OK", null);
+                        errorBuilder.show();
+                    });
+                }
+            }).start();
+        });
+
+        builder.setNegativeButton("Cancel", (dialog, which) -> dialog.cancel());
+        builder.show();
+    }
+
+
     private void showLastTradesDetailsDialog(List<InstanceInterface.DealData> result) {
         AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
         List<String> shortWorkers = new ArrayList<>();

app/src/main/res/menu/exchange_popup_menu.xml

@@ -12,4 +12,6 @@
         android:title="View paused traders" />
     <item android:id="@+id/exchangeMenuConfigFile"
         android:title="View config file" />
+    <item android:id="@+id/exchangeModDefaultOrderSize"
+        android:title="Modify default order size" />
 </menu>

app/src/main/res/menu/worker_popup_menu.xml

@@ -42,6 +42,8 @@
     <item android:id="@+id/workerMenuAdd"
         android:title="Add...">
         <menu>
+            <item android:id="@+id/modOrderSize"
+                android:title="Modify order size"/>
             <item android:id="@+id/modConcurrentSafetyOrders"
                 android:title="Modify concurrent safety orders"/>
             <item android:id="@+id/addSafetyOrders"

app/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <resources>
     <string name="app_name" translatable="false">DCAv2GUI</string>
     <string name="nav_header_title" translatable="false">DCAv2</string>
-    <string name="nav_header_subtitle">Version 2025.09.05</string>
+    <string name="nav_header_subtitle">Version 2025.09.06</string>
     <string name="navigation_drawer_open">Open navigation drawer</string>
     <string name="navigation_drawer_close">Close navigation drawer</string>
     <string name="nav_header_desc">Navigation header</string>