desktop app creates offers with floating market price

core/src/main/java/bisq/core/offer/CreateOfferService.java

@@ -133,6 +133,12 @@ public class CreateOfferService {
                 minAmount,
                 buyerSecurityDepositAsDouble);
 
+        // verify fixed price xor market price with margin
+        if (price != null) {
+            if (useMarketBasedPrice) throw new IllegalArgumentException("Can create offer with fixed price or floating market price but not both");
+            if (marketPriceMargin != 0) throw new IllegalArgumentException("Cannot set market price margin with fixed price");
+        }
+
         long creationTime = new Date().getTime();
         NodeAddress makerAddress = p2PService.getAddress();
         boolean useMarketBasedPriceValue = price == null &&

desktop/src/main/java/bisq/desktop/main/offer/MutableOfferDataModel.java

@@ -293,7 +293,7 @@ public abstract class MutableOfferDataModel extends OfferDataModel {
                 tradeCurrencyCode.get(),
                 amount.get(),
                 minAmount.get(),
-                price.get(),
+                useMarketBasedPrice.get() ? null : price.get(),
                 Coin.ZERO,
                 useMarketBasedPrice.get(),
                 marketPriceMargin,

desktop/src/main/java/bisq/desktop/main/offer/MutableOfferViewModel.java

@@ -676,11 +676,8 @@ public abstract class MutableOfferViewModel<M extends MutableOfferDataModel> ext
     // On focus out we do validation and apply the data to the model
     void onFocusOutAmountTextField(boolean oldValue, boolean newValue) {
         if (oldValue && !newValue) {
-            System.out.println("Checking if input valid: " + amount.get());
             InputValidator.ValidationResult result = isXmrInputValid(amount.get());
             amountValidationResult.set(result);
-            System.out.println("Result is valid: " + result.isValid);
-            System.out.println("Result error: " + result.errorMessage);
             if (result.isValid) {
                 setAmountToModel();
                 ignoreAmountStringListener = true;