Update Perp artifacts to 1.0.1 (#175)

* Update Perp artifacts to v1.0.2
* Add _getNetQuoteBalance method (to replace removed Perp getter)

Author: cgewecke

contracts/protocol/modules/PerpV2LeverageModule.sol

@@ -697,7 +697,6 @@ contract PerpV2LeverageModule is ModuleBase, ReentrancyGuard, Ownable, IModuleIs
      */
     function getAccountInfo(ISetToken _setToken) public view returns (AccountInfo memory accountInfo) {
         (int256 owedRealizedPnl,, ) =  perpAccountBalance.getPnlAndPendingFee(address(_setToken));
-        (int256 netQuoteBalance, ) =  perpAccountBalance.getNetQuoteBalanceAndPendingFee(address(_setToken));
 
         // NOTE: pendingFundingPayments are represented as in the Perp system as "funding owed"
         // e.g a positive number is a debt which gets subtracted from owedRealizedPnl on settlement.
@@ -706,7 +705,7 @@ contract PerpV2LeverageModule is ModuleBase, ReentrancyGuard, Ownable, IModuleIs
             collateralBalance: _getCollateralBalance(_setToken),
             owedRealizedPnl: owedRealizedPnl,
             pendingFundingPayments: perpExchange.getAllPendingFundingPayment(address(_setToken)).mul(-1),
-            netQuoteBalance: netQuoteBalance
+            netQuoteBalance: _getNetQuoteBalance(_setToken)
         });
     }
 
@@ -1204,6 +1203,15 @@ contract PerpV2LeverageModule is ModuleBase, ReentrancyGuard, Ownable, IModuleIs
         return _toPreciseUnitsFromDecimals(balance, collateralDecimals);
     }
 
+    // @dev Retrieves net quote balance of all open positions
+    function _getNetQuoteBalance(ISetToken _setToken) internal view returns (int256 netQuoteBalance) {
+        for (uint256 i = 0; i < positions[_setToken].length; i++) {
+            netQuoteBalance = netQuoteBalance.add(
+                perpAccountBalance.getQuote(address(_setToken), positions[_setToken][i])
+            );
+        }
+    }
+
     /**
      * @dev Returns issuance or redemption adjustments in the format expected by `SlippageIssuanceModule`.
      * The last recorded externalPositionUnit (current) is subtracted from a dynamically generated
@@ -1290,4 +1298,4 @@ contract PerpV2LeverageModule is ModuleBase, ReentrancyGuard, Ownable, IModuleIs
     function _abs(int x) internal pure returns (int) {
         return x >= 0 ? x : x.mul(-1);
     }
-}
+}