From 666809041a58131413813684e4fafedb194cf285 Mon Sep 17 00:00:00 2001
From: Mike Pope <mpope@computer.org>
Date: Mon, 13 Jan 2020 14:27:52 +1030
Subject: [PATCH] Check gold before buying from natives.

---
 src/net/sf/freecol/client/control/InGameController.java | 3 ++-
 src/net/sf/freecol/server/control/InGameController.java | 3 +++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/net/sf/freecol/client/control/InGameController.java b/src/net/sf/freecol/client/control/InGameController.java
index 91727881a..8c2cf1e30 100644
--- a/src/net/sf/freecol/client/control/InGameController.java
+++ b/src/net/sf/freecol/client/control/InGameController.java
@@ -3987,7 +3987,8 @@ public final class InGameController extends FreeColClientHolder {
                     nt.setItem(nti);
                 }
                 TradeBuyAction tba = getGUI().getBuyChoice(unit, is,
-                    nti.getGoods(), nti.getPrice(), true);
+                    nti.getGoods(), nti.getPrice(),
+                    unit.getOwner().checkGold(nti.getPrice()));
                 if (tba == TradeBuyAction.BUY) {
                     askServer().nativeTrade(NativeTradeAction.BUY, nt);
                     return;
diff --git a/src/net/sf/freecol/server/control/InGameController.java b/src/net/sf/freecol/server/control/InGameController.java
index b5fd38b7e..6f29eba29 100644
--- a/src/net/sf/freecol/server/control/InGameController.java
+++ b/src/net/sf/freecol/server/control/InGameController.java
@@ -3118,6 +3118,9 @@ public final class InGameController extends Controller {
                             item.goodsMatcher()) == null) {
                 return serverPlayer.clientError("Item missing for "
                     + action + ": " + nt);
+            } else if (!serverPlayer.checkGold(item.getPrice())) {
+                return serverPlayer.clientError("Player can not afford item: "
+                    + nt);
             }
             nt.setItem(item);
             cs.add(See.only(otherPlayer),