diff --git a/src/controllers/api/giveStartingGearController.ts b/src/controllers/api/giveStartingGearController.ts
index ef9be78f..118664b3 100644
--- a/src/controllers/api/giveStartingGearController.ts
+++ b/src/controllers/api/giveStartingGearController.ts
@@ -39,7 +39,7 @@ const awakeningRewards = [
 export const addStartingGear = async (
     inventory: HydratedDocument<IInventoryDatabase, InventoryDocumentProps>,
     startingGear: TPartialStartingGear | undefined = undefined
-) => {
+): Promise<IInventoryChanges> => {
     const { LongGuns, Pistols, Suits, Melee } = startingGear || {
         LongGuns: [{ ItemType: "/Lotus/Weapons/Tenno/Rifle/Rifle" }],
         Pistols: [{ ItemType: "/Lotus/Weapons/Tenno/Pistol/Pistol" }],
diff --git a/src/controllers/api/infestedFoundryController.ts b/src/controllers/api/infestedFoundryController.ts
index f79587b5..acce1508 100644
--- a/src/controllers/api/infestedFoundryController.ts
+++ b/src/controllers/api/infestedFoundryController.ts
@@ -249,7 +249,7 @@ export const infestedFoundryController: RequestHandler = async (req, res) => {
             const suit = inventory.Suits.id(request.SuitId.$oid)!;
             inventory.Suits.pull(suit);
             const consumedSuit: IConsumedSuit = { s: suit.ItemType };
-            if (suit.Configs && suit.Configs[0] && suit.Configs[0].pricol) {
+            if (suit.Configs[0] && suit.Configs[0].pricol) {
                 consumedSuit.c = suit.Configs[0].pricol;
             }
             if ((inventory.InfestedFoundry!.XP ?? 0) < 73125_00) {
diff --git a/src/controllers/api/projectionManagerController.ts b/src/controllers/api/projectionManagerController.ts
index 90c07f45..1f2554fb 100644
--- a/src/controllers/api/projectionManagerController.ts
+++ b/src/controllers/api/projectionManagerController.ts
@@ -50,6 +50,7 @@ const qualityKeywordToNumber: Record<VoidProjectionQuality, number> = {
 // e.g. "/Lotus/Types/Game/Projections/T2VoidProjectionProteaPrimeDBronze" -> ["Lith", "W5", "VPQ_BRONZE"]
 const parseProjection = (typeName: string): [string, string, VoidProjectionQuality] => {
     const relic: IRelic | undefined = ExportRelics[typeName];
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (!relic) {
         throw new Error(`Unknown projection ${typeName}`);
     }
diff --git a/src/controllers/custom/getItemListsController.ts b/src/controllers/custom/getItemListsController.ts
index 57792dd4..86488d12 100644
--- a/src/controllers/custom/getItemListsController.ts
+++ b/src/controllers/custom/getItemListsController.ts
@@ -39,17 +39,11 @@ const getItemListsController: RequestHandler = (req, response) => {
     res.miscitems = [];
     res.Syndicates = [];
     for (const [uniqueName, item] of Object.entries(ExportWarframes)) {
-        if (
-            item.productCategory == "Suits" ||
-            item.productCategory == "SpaceSuits" ||
-            item.productCategory == "MechSuits"
-        ) {
-            res[item.productCategory].push({
-                uniqueName,
-                name: getString(item.name, lang),
-                exalted: item.exalted
-            });
-        }
+        res[item.productCategory].push({
+            uniqueName,
+            name: getString(item.name, lang),
+            exalted: item.exalted
+        });
     }
     for (const [uniqueName, item] of Object.entries(ExportSentinels)) {
         if (item.productCategory == "Sentinels") {
diff --git a/src/index.ts b/src/index.ts
index acf55bdb..8bf614ef 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -25,8 +25,10 @@ mongoose
             cert: fs.readFileSync("static/certs/cert.pem")
         };
 
+        // eslint-disable-next-line @typescript-eslint/no-misused-promises
         http.createServer(app).listen(httpPort, () => {
             logger.info("HTTP server started on port " + httpPort);
+            // eslint-disable-next-line @typescript-eslint/no-misused-promises
             https.createServer(options, app).listen(httpsPort, () => {
                 logger.info("HTTPS server started on port " + httpsPort);
 
diff --git a/src/models/inventoryModels/inventoryModel.ts b/src/models/inventoryModels/inventoryModel.ts
index af50028f..0e82181c 100644
--- a/src/models/inventoryModels/inventoryModel.ts
+++ b/src/models/inventoryModels/inventoryModel.ts
@@ -808,7 +808,7 @@ detailsSchema.set("toJSON", {
 const EquipmentSchema = new Schema<IEquipmentDatabase>(
     {
         ItemType: String,
-        Configs: [ItemConfigSchema],
+        Configs: { type: [ItemConfigSchema], default: [] },
         UpgradeVer: { type: Number, default: 101 },
         XP: { type: Number, default: 0 },
         Features: Number,
@@ -1303,7 +1303,7 @@ inventorySchema.set("toJSON", {
         if (inventoryDatabase.GuildId) {
             inventoryResponse.GuildId = toOid(inventoryDatabase.GuildId);
         }
-        if (inventoryResponse.BlessingCooldown) {
+        if (inventoryDatabase.BlessingCooldown) {
             inventoryResponse.BlessingCooldown = toMongoDate(inventoryDatabase.BlessingCooldown);
         }
     }
diff --git a/src/services/importService.ts b/src/services/importService.ts
index 94fa1ef0..979221c8 100644
--- a/src/services/importService.ts
+++ b/src/services/importService.ts
@@ -50,6 +50,7 @@ const convertEquipment = (client: IEquipmentClient): IEquipmentDatabase => {
         UpgradesExpiry: convertOptionalDate(client.UpgradesExpiry),
         CrewMembers: client.CrewMembers ? convertCrewShipMembers(client.CrewMembers) : undefined,
         Details: client.Details ? convertKubrowDetails(client.Details) : undefined,
+        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
         Configs: client.Configs
             ? client.Configs.map(obj =>
                   Object.fromEntries(
diff --git a/src/services/inboxService.ts b/src/services/inboxService.ts
index 895699f1..fa7a3812 100644
--- a/src/services/inboxService.ts
+++ b/src/services/inboxService.ts
@@ -27,7 +27,7 @@ export const deleteAllMessagesRead = async (accountId: string): Promise<void> =>
     await Inbox.deleteMany({ ownerId: accountId, r: true });
 };
 
-export const createNewEventMessages = async (req: Request) => {
+export const createNewEventMessages = async (req: Request): Promise<void> => {
     const account = await getAccountForRequest(req);
     const latestEventMessageDate = account.LatestEventMessageDate;
 
diff --git a/src/services/inventoryService.ts b/src/services/inventoryService.ts
index 597a4bb7..12ea2b25 100644
--- a/src/services/inventoryService.ts
+++ b/src/services/inventoryService.ts
@@ -203,6 +203,7 @@ export const addItem = async (
             const inventoryChanges = {
                 ...addCrewShip(inventory, typeName),
                 // fix to unlock railjack modding, item bellow supposed to be obtained from archwing quest
+                // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
                 ...(!inventory.CrewShipHarnesses?.length
                     ? addCrewShipHarness(inventory, "/Lotus/Types/Game/CrewShip/RailJack/DefaultHarness")
                     : {})
@@ -522,12 +523,14 @@ export const addSentinel = (
     sentinelName: string,
     inventoryChanges: IInventoryChanges = {}
 ): IInventoryChanges => {
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (ExportSentinels[sentinelName]?.defaultWeapon) {
         addSentinelWeapon(inventory, ExportSentinels[sentinelName].defaultWeapon, inventoryChanges);
     }
 
     const modsToGive: IRawUpgrade[] = [];
     const configs: IItemConfig[] = [];
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (ExportSentinels[sentinelName]?.defaultUpgrades) {
         const upgrades = [];
         for (const defaultUpgrade of ExportSentinels[sentinelName].defaultUpgrades) {
diff --git a/src/services/missionInventoryUpdateService.ts b/src/services/missionInventoryUpdateService.ts
index 2fd25030..1901f2d3 100644
--- a/src/services/missionInventoryUpdateService.ts
+++ b/src/services/missionInventoryUpdateService.ts
@@ -80,7 +80,7 @@ export const creditBundles: Record<string, number> = {
 export const addMissionInventoryUpdates = (
     inventory: HydratedDocument<IInventoryDatabase, InventoryDocumentProps>,
     inventoryUpdates: IMissionInventoryUpdateRequest
-) => {
+): Partial<IInventoryDatabase> | undefined => {
     //TODO: type this properly
     const inventoryChanges: Partial<IInventoryDatabase> = {};
     if (inventoryUpdates.MissionFailed === true) {
@@ -287,7 +287,7 @@ export const addMissionRewards = async (
 
         //node based credit rewards for mission completion
         if (node.missionIndex !== 28) {
-            const levelCreditReward = getLevelCreditRewards(missions?.Tag);
+            const levelCreditReward = getLevelCreditRewards(missions.Tag);
             missionCompletionCredits += levelCreditReward;
             inventory.RegularCredits += levelCreditReward;
             logger.debug(`levelCreditReward ${levelCreditReward}`);
@@ -393,7 +393,7 @@ function getRandomMissionDrops(RewardInfo: IRewardInfo): IRngResult[] {
     const drops: IRngResult[] = [];
     if (RewardInfo.node in ExportRegions) {
         const region = ExportRegions[RewardInfo.node];
-        const rewardManifests = region.rewardManifests ?? [];
+        const rewardManifests = region.rewardManifests;
 
         let rotations: number[] = [];
         if (RewardInfo.VaultsCracked) {
diff --git a/src/services/questService.ts b/src/services/questService.ts
index 65d7e509..d0bdd9db 100644
--- a/src/services/questService.ts
+++ b/src/services/questService.ts
@@ -15,6 +15,7 @@ import { logger } from "@/src/utils/logger";
 import { HydratedDocument } from "mongoose";
 import { ExportKeys } from "warframe-public-export-plus";
 import { addFixedLevelRewards } from "./missionInventoryUpdateService";
+import { IInventoryChanges } from "../types/purchaseTypes";
 
 export interface IUpdateQuestRequest {
     QuestKeys: Omit<IQuestKeyDatabase, "CompletionDate">[];
@@ -64,6 +65,7 @@ export const updateQuestStage = (
 
     const questStage = quest.Progress[ChainStage];
 
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     if (!questStage) {
         const questStageIndex = quest.Progress.push(questStageUpdate) - 1;
         if (questStageIndex !== ChainStage) {
@@ -86,6 +88,7 @@ export const addQuestKey = (inventory: TInventoryDatabaseDocument, questKey: IQu
 };
 
 export const completeQuest = async (inventory: TInventoryDatabaseDocument, questKey: string) => {
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
     const chainStages = ExportKeys[questKey]?.chainStages;
 
     if (!chainStages) {
@@ -164,7 +167,10 @@ export const completeQuest = async (inventory: TInventoryDatabaseDocument, quest
     //TODO: handle quest completion items
 };
 
-export const giveKeyChainItem = async (inventory: TInventoryDatabaseDocument, keyChainInfo: IKeyChainRequest) => {
+export const giveKeyChainItem = async (
+    inventory: TInventoryDatabaseDocument,
+    keyChainInfo: IKeyChainRequest
+): Promise<IInventoryChanges> => {
     const inventoryChanges = await addKeyChainItems(inventory, keyChainInfo);
 
     if (isEmptyObject(inventoryChanges)) {
@@ -189,7 +195,7 @@ export const giveKeyChainMessage = async (
     inventory: TInventoryDatabaseDocument,
     accountId: string,
     keyChainInfo: IKeyChainRequest
-) => {
+): Promise<void> => {
     const keyChainMessage = getKeyChainMessage(keyChainInfo);
 
     const message = {
diff --git a/src/services/saveLoadoutService.ts b/src/services/saveLoadoutService.ts
index 188b06ae..63533e43 100644
--- a/src/services/saveLoadoutService.ts
+++ b/src/services/saveLoadoutService.ts
@@ -148,7 +148,7 @@ export const handleInventoryItemConfigChange = async (
 
                     const itemEntries = equipment as IItemEntry;
                     for (const [itemId, itemConfigEntries] of Object.entries(itemEntries)) {
-                        const inventoryItem = inventory[equipmentName].find(item => item._id?.toString() === itemId);
+                        const inventoryItem = inventory[equipmentName].id(itemId);
 
                         if (!inventoryItem) {
                             throw new Error(`inventory item ${equipmentName} not found with id ${itemId}`);
diff --git a/src/services/statsService.ts b/src/services/statsService.ts
index d520e842..a247a181 100644
--- a/src/services/statsService.ts
+++ b/src/services/statsService.ts
@@ -58,6 +58,7 @@ export const updateStats = async (playerStats: TStatsDatabaseDocument, payload:
                                         break;
                                     default:
                                         if (!ignoredCategories.includes(category)) {
+                                            // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
                                             if (!unknownCategories[action]) {
                                                 unknownCategories[action] = [];
                                             }
@@ -229,6 +230,7 @@ export const updateStats = async (playerStats: TStatsDatabaseDocument, payload:
 
                         default:
                             if (!ignoredCategories.includes(category)) {
+                                // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
                                 if (!unknownCategories[action]) {
                                     unknownCategories[action] = [];
                                 }
diff --git a/src/types/inventoryTypes/inventoryTypes.ts b/src/types/inventoryTypes/inventoryTypes.ts
index f6e0c85a..e93f6b3c 100644
--- a/src/types/inventoryTypes/inventoryTypes.ts
+++ b/src/types/inventoryTypes/inventoryTypes.ts
@@ -51,7 +51,7 @@ export interface IInventoryDatabase
     GuildId?: Types.ObjectId;
     PendingRecipes: IPendingRecipe[];
     QuestKeys: IQuestKeyDatabase[];
-    BlessingCooldown: Date;
+    BlessingCooldown?: Date;
     Ships: Types.ObjectId[];
     WeaponSkins: IWeaponSkinDatabase[];
     Upgrades: IUpgradeDatabase[];
@@ -300,7 +300,7 @@ export interface IInventoryClient extends IDailyAffiliations, InventoryClientEqu
     PlayedParkourTutorial: boolean;
     SubscribedToEmailsPersonalized: number;
     InfestedFoundry?: IInfestedFoundryClient;
-    BlessingCooldown: IMongoDate;
+    BlessingCooldown?: IMongoDate;
     CrewShipRawSalvage: IConsumable[];
     CrewMembers: ICrewMember[];
     LotusCustomization: ILotusCustomization;
@@ -309,7 +309,7 @@ export interface IInventoryClient extends IDailyAffiliations, InventoryClientEqu
     LastInventorySync: IOid;
     NextRefill: IMongoDate; // Next time argon crystals will have a decay tick
     FoundToday?: IMiscItem[]; // for Argon Crystals
-    CustomMarkers: ICustomMarkers[];
+    CustomMarkers?: ICustomMarkers[];
     ActiveLandscapeTraps: any[];
     EvolutionProgress?: IEvolutionProgress[];
     RepVotes: any[];
diff --git a/src/utils/logger.ts b/src/utils/logger.ts
index 52000727..f3873591 100644
--- a/src/utils/logger.ts
+++ b/src/utils/logger.ts
@@ -33,9 +33,9 @@ const consolelogFormat = format.printf(info => {
             colors: true
         });
 
-        return `${info.timestamp} [${info.version}] ${info.level}: ${info.message} ${metadataString}`;
+        return `${info.timestamp as string} [${info.version as string}] ${info.level}: ${info.message as string} ${metadataString}`;
     }
-    return `${info.timestamp} [${info.version}] ${info.level}: ${info.message}`;
+    return `${info.timestamp as string} [${info.version as string}] ${info.level}: ${info.message as string}`;
 });
 
 const fileFormat = format.combine(