From 5ec515b178f92306e64700ce7d7bca4db01ffb0d Mon Sep 17 00:00:00 2001
From: Nour Alharithi <nour.alharithi@gmail.com>
Date: Thu, 18 Jan 2024 13:52:45 -0800
Subject: [PATCH 1/2] strip slot from dlob diff check

---
 src/dlob-subscriber/DLOBSubscriberIO.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/dlob-subscriber/DLOBSubscriberIO.ts b/src/dlob-subscriber/DLOBSubscriberIO.ts
index a630ada..ee984c9 100644
--- a/src/dlob-subscriber/DLOBSubscriberIO.ts
+++ b/src/dlob-subscriber/DLOBSubscriberIO.ts
@@ -96,6 +96,10 @@ export class DLOBSubscriberIO extends DLOBSubscriber {
 		const grouping = l2Args.grouping;
 		const { marketName, ...l2FuncArgs } = l2Args;
 		const l2 = this.getL2(l2FuncArgs);
+		const slot = l2.slot;
+		if (slot) {
+			delete l2.slot;
+		}
 		const marketType = isVariant(l2Args.marketType, 'perp') ? 'perp' : 'spot';
 		let l2Formatted: any;
 		if (grouping) {
@@ -119,6 +123,7 @@ export class DLOBSubscriberIO extends DLOBSubscriber {
 		l2Formatted['marketName'] = marketName?.toUpperCase();
 		l2Formatted['marketType'] = marketType?.toLowerCase();
 		l2Formatted['marketIndex'] = l2Args.marketIndex;
+		l2Formatted['slot'] = slot;
 		addOracletoResponse(
 			l2Formatted,
 			this.driftClient,

From 1d7d8754e8970445911471afd10e41d9ca6be2c0 Mon Sep 17 00:00:00 2001
From: Nour Alharithi <nour.alharithi@gmail.com>
Date: Thu, 18 Jan 2024 15:40:53 -0800
Subject: [PATCH 2/2] add market slot to response'

---
 src/dlob-subscriber/DLOBSubscriberIO.ts |  9 ++++++++-
 src/utils/utils.ts                      | 15 +++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/dlob-subscriber/DLOBSubscriberIO.ts b/src/dlob-subscriber/DLOBSubscriberIO.ts
index ee984c9..b67b1b4 100644
--- a/src/dlob-subscriber/DLOBSubscriberIO.ts
+++ b/src/dlob-subscriber/DLOBSubscriberIO.ts
@@ -10,6 +10,7 @@ import {
 import { RedisClient } from '../utils/redisClient';
 import {
 	SubscriberLookup,
+	addMarketSlotToResponse,
 	addOracletoResponse,
 	l2WithBNToStrings,
 } from '../utils/utils';
@@ -130,7 +131,13 @@ export class DLOBSubscriberIO extends DLOBSubscriber {
 			l2Args.marketType,
 			l2Args.marketIndex
 		);
-
+		addMarketSlotToResponse(
+			l2Formatted,
+			this.driftClient,
+			l2Args.marketType,
+			l2Args.marketIndex
+		);
+	
 		const l2Formatted_depth100 = Object.assign({}, l2Formatted, {
 			bids: l2Formatted.bids.slice(0, 100),
 			asks: l2Formatted.asks.slice(0, 100),
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index d8530ba..831a7fb 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -132,6 +132,21 @@ export const addOracletoResponse = (
 	}
 };
 
+export const addMarketSlotToResponse = (
+	response: L2OrderBook | L3OrderBook,
+	driftClient: DriftClient,
+	marketType: MarketType,
+	marketIndex: number
+): void => {
+	let marketSlot: number;
+	if (isVariant(marketType, 'perp')) {
+		marketSlot = driftClient.accountSubscriber.getMarketAccountAndSlot(marketIndex).slot;
+	} else {
+		marketSlot = driftClient.accountSubscriber.getSpotMarketAccountAndSlot(marketIndex).slot;
+	}
+	response['marketSlot'] = marketSlot;
+};
+
 /**
  * Takes in a req.query like: `{
  * 		marketName: 'SOL-PERP,BTC-PERP,ETH-PERP',