From 6b0879e59a3e5156fde88f4c90d0029aa31b3786 Mon Sep 17 00:00:00 2001
From: kree-dotcom <kree2311@protonmail.com>
Date: Thu, 15 Dec 2022 18:51:15 +0000
Subject: [PATCH] partial loan payback under minOpeningMargin

---
 contracts/Vault_Synths.sol | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/contracts/Vault_Synths.sol b/contracts/Vault_Synths.sol
index 3557494..958962a 100644
--- a/contracts/Vault_Synths.sol
+++ b/contracts/Vault_Synths.sol
@@ -212,7 +212,7 @@ contract Vault_Synths is Vault_Base_ERC20 {
             _USDToVault = isoUSDdebt;
         }
         uint256 outstandingisoUSD = isoUSDdebt - _USDToVault;
-        if(outstandingisoUSD > 0){ //check for leftover debt
+        if((outstandingisoUSD > 0) && (_collateralToUser > 0)){ //check for leftover debt
             uint256 collateralLeft = collateralPosted[_collateralAddress][msg.sender] - _collateralToUser;
             uint256 colInUSD = priceCollateralToUSD(currencyKey, collateralLeft); 
             uint256 borrowMargin = (outstandingisoUSD * minOpeningMargin) / LOAN_SCALE;