From 06ce33215c3e592f4ee5761048002241750d274f Mon Sep 17 00:00:00 2001
From: Mudit Gupta <guptamudit@ymail.com>
Date: Fri, 14 Dec 2018 15:49:42 +0530
Subject: [PATCH] Fix rounding off errors (#467)

* Fixed rounding off errors

* Increased tolerance

* Reduced tolerance to zero

* Comment updated

* Tolerance set to 2
---
 contracts/modules/STO/USDTieredSTO.sol | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/contracts/modules/STO/USDTieredSTO.sol b/contracts/modules/STO/USDTieredSTO.sol
index 825df2122..1d7278796 100644
--- a/contracts/modules/STO/USDTieredSTO.sol
+++ b/contracts/modules/STO/USDTieredSTO.sol
@@ -455,7 +455,7 @@ contract USDTieredSTO is USDTieredSTOStorage, ISTO, ReentrancyGuard {
             fundsRaisedUSD = fundsRaisedUSD.add(spentUSD);
         }
 
-        spentValue = DecimalMath.mul(DecimalMath.div(spentUSD, originalUSD), _investmentValue);
+        spentValue = DecimalMath.div(spentUSD, _rate);
     }
 
     /**
@@ -494,7 +494,7 @@ contract USDTieredSTO is USDTieredSTOStorage, ISTO, ReentrancyGuard {
             }
         }
 
-        spentValue = DecimalMath.mul(DecimalMath.div(spentUSD, originalUSD), _investmentValue);
+        spentValue = DecimalMath.div(spentUSD, rate);
     }
 
     function _buyTokensChecks(