From a5276b2fe97c7817c4b1b7864092aee9563be916 Mon Sep 17 00:00:00 2001
From: jayy04 <103467857+jayy04@users.noreply.github.com>
Date: Thu, 28 Mar 2024 20:32:31 -0400
Subject: [PATCH] [CT-712] send updates for both normal order matches and
 liquidation (#1280) (#1281)

---
 protocol/x/clob/abci.go | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/protocol/x/clob/abci.go b/protocol/x/clob/abci.go
index da97274adf..a22606f18a 100644
--- a/protocol/x/clob/abci.go
+++ b/protocol/x/clob/abci.go
@@ -174,10 +174,18 @@ func PrepareCheckState(
 		// Send an update for reverted local operations.
 		for _, operation := range localValidatorOperationsQueue {
 			if match := operation.GetMatch(); match != nil {
-				orderIdsToSend[match.GetMatchOrders().TakerOrderId] = true
-
-				for _, fill := range match.GetMatchOrders().Fills {
-					orderIdsToSend[fill.MakerOrderId] = true
+				// For normal order matches, we send an update for the taker and maker orders.
+				if matchedOrders := match.GetMatchOrders(); matchedOrders != nil {
+					orderIdsToSend[matchedOrders.TakerOrderId] = true
+					for _, fill := range matchedOrders.Fills {
+						orderIdsToSend[fill.MakerOrderId] = true
+					}
+				}
+				// For liquidation matches, we send an update for the maker orders.
+				if matchedLiquidation := match.GetMatchPerpetualLiquidation(); matchedLiquidation != nil {
+					for _, fill := range matchedLiquidation.Fills {
+						orderIdsToSend[fill.MakerOrderId] = true
+					}
 				}
 			}
 		}