From 3f714b9dc848d28d1753fd8a673038fda4f024ed Mon Sep 17 00:00:00 2001
From: eboado <ernesto.boado.moreira@gmail.com>
Date: Wed, 28 Oct 2020 11:48:55 +0100
Subject: [PATCH] - Fixed non-initialized availableLiquidity on
 validateBorrow()

---
 contracts/lendingpool/LendingPool.sol         | 1 +
 contracts/libraries/logic/ValidationLogic.sol | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/contracts/lendingpool/LendingPool.sol b/contracts/lendingpool/LendingPool.sol
index c63ff348..b387f59f 100644
--- a/contracts/lendingpool/LendingPool.sol
+++ b/contracts/lendingpool/LendingPool.sol
@@ -844,6 +844,7 @@ contract LendingPool is VersionedInitializable, ILendingPool, LendingPoolStorage
     );
 
     ValidationLogic.validateBorrow(
+      vars.asset,
       reserve,
       vars.onBehalfOf,
       vars.amount,
diff --git a/contracts/libraries/logic/ValidationLogic.sol b/contracts/libraries/logic/ValidationLogic.sol
index 947d84ea..08f0ba35 100644
--- a/contracts/libraries/logic/ValidationLogic.sol
+++ b/contracts/libraries/logic/ValidationLogic.sol
@@ -99,6 +99,7 @@ library ValidationLogic {
 
   /**
    * @dev validates a borrow.
+   * @param asset the address of the asset to borrow
    * @param reserve the reserve state from which the user is borrowing
    * @param userAddress the address of the user
    * @param amount the amount to be borrowed
@@ -112,6 +113,7 @@ library ValidationLogic {
    */
 
   function validateBorrow(
+    address asset,
     ReserveLogic.ReserveData storage reserve,
     address userAddress,
     uint256 amount,
@@ -198,6 +200,8 @@ library ValidationLogic {
         Errors.CALLATERAL_SAME_AS_BORROWING_CURRENCY
       );
 
+      vars.availableLiquidity = IERC20(asset).balanceOf(reserve.aTokenAddress);
+
       //calculate the max available loan size in stable rate mode as a percentage of the
       //available liquidity
       uint256 maxLoanSizeStable = vars.availableLiquidity.percentMul(maxStableLoanPercent);