From 7a819f4955a43f9bbdfbb87ebd111c3c95af249e Mon Sep 17 00:00:00 2001
From: cyan317 <120398799+cindyyan317@users.noreply.github.com>
Date: Wed, 8 Mar 2023 15:08:20 +0000
Subject: [PATCH] Gateway balance fix (#535)

Fixes #464
---
 src/rpc/handlers/GatewayBalances.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/rpc/handlers/GatewayBalances.cpp b/src/rpc/handlers/GatewayBalances.cpp
index 27d60c30..7cf874f5 100644
--- a/src/rpc/handlers/GatewayBalances.cpp
+++ b/src/rpc/handlers/GatewayBalances.cpp
@@ -151,7 +151,17 @@ doGatewayBalances(Context const& context)
                     bal = -balance;
                 }
                 else
-                    bal -= balance;
+                {  // when overflow happens, insert a flag to indicate
+                   // https://github.com/XRPLF/rippled/pull/4355
+                    try
+                    {
+                        bal -= balance;
+                    }
+                    catch (std::runtime_error& e)
+                    {
+                        response["overflow"] = true;
+                    }
+                }
             }
         }
         return true;