diff --git a/src/Achievements/Achievements.ts b/src/Achievements/Achievements.ts
index acbf35dd8..fa6a33e79 100644
--- a/src/Achievements/Achievements.ts
+++ b/src/Achievements/Achievements.ts
@@ -20,7 +20,6 @@ import { SpecialServers } from "../Server/data/SpecialServers";
 import { Server } from "../Server/Server";
 import { Router } from "../ui/GameRoot";
 import { Page } from "../ui/Router";
-import { IMap } from "../types";
 import * as data from "./AchievementData.json";
 import { FactionNames } from "../Faction/data/FactionNames";
 import { BlackOperationNames } from "../Bladeburner/data/BlackOperationNames";
@@ -47,7 +46,7 @@ export interface PlayerAchievement {
 }
 
 export interface AchievementDataJson {
-  achievements: IMap<AchievementData>;
+  achievements: Record<string, AchievementData>;
 }
 
 export interface AchievementData {
@@ -87,7 +86,7 @@ function sfAchievement(): Achievement[] {
   return achs;
 }
 
-export const achievements: IMap<Achievement> = {
+export const achievements: Record<string, Achievement> = {
   [FactionNames.CyberSec.toUpperCase()]: {
     ...achievementData[FactionNames.CyberSec.toUpperCase()],
     Icon: "CSEC",
diff --git a/src/Alias.ts b/src/Alias.ts
index ee2801564..aa65642a1 100644
--- a/src/Alias.ts
+++ b/src/Alias.ts
@@ -1,8 +1,7 @@
-import { IMap } from "./types";
 import { Terminal } from "./Terminal";
 
-export let Aliases: IMap<string> = {};
-export let GlobalAliases: IMap<string> = {};
+export let Aliases: Record<string, string> = {};
+export let GlobalAliases: Record<string, string> = {};
 
 export function loadAliases(saveString: string): void {
   if (saveString === "") {
diff --git a/src/Augmentation/StaticAugmentations.ts b/src/Augmentation/StaticAugmentations.ts
index 768e52770..68ea0046a 100644
--- a/src/Augmentation/StaticAugmentations.ts
+++ b/src/Augmentation/StaticAugmentations.ts
@@ -1,4 +1,3 @@
 import { Augmentation } from "./Augmentation";
-import { IMap } from "../types";
 
-export const StaticAugmentations: IMap<Augmentation> = {};
+export const StaticAugmentations: Record<string, Augmentation> = {};
diff --git a/src/BitNode/BitNode.tsx b/src/BitNode/BitNode.tsx
index 2abb4eea6..ade41b3e0 100644
--- a/src/BitNode/BitNode.tsx
+++ b/src/BitNode/BitNode.tsx
@@ -1,7 +1,6 @@
 import React from "react";
 import { Player } from "../Player";
 import { BitNodeMultipliers, IBitNodeMultipliers } from "./BitNodeMultipliers";
-import { IMap } from "../types";
 import { FactionNames } from "../Faction/data/FactionNames";
 import { CityName } from "../Locations/data/CityNames";
 
@@ -29,7 +28,7 @@ class BitNode {
   }
 }
 
-export const BitNodes: IMap<BitNode> = {};
+export const BitNodes: Record<string, BitNode> = {};
 export function initBitNodes() {
   BitNodes["BitNode1"] = new BitNode(
     1,
diff --git a/src/Bladeburner/BlackOperations.tsx b/src/Bladeburner/BlackOperations.tsx
index 588543c23..b369ce2f6 100644
--- a/src/Bladeburner/BlackOperations.tsx
+++ b/src/Bladeburner/BlackOperations.tsx
@@ -1,8 +1,7 @@
 import { BlackOperation } from "./BlackOperation";
-import { IMap } from "../types";
 import { BlackOperationNames } from "./data/BlackOperationNames";
 
-export const BlackOperations: IMap<BlackOperation> = {};
+export const BlackOperations: Record<string, BlackOperation> = {};
 
 (function () {
   BlackOperations[BlackOperationNames.OperationTyphoon] = new BlackOperation({
diff --git a/src/Bladeburner/GeneralActions.tsx b/src/Bladeburner/GeneralActions.tsx
index dfe5b3d8e..d41973ed6 100644
--- a/src/Bladeburner/GeneralActions.tsx
+++ b/src/Bladeburner/GeneralActions.tsx
@@ -1,7 +1,6 @@
 import { Action } from "./Action";
-import { IMap } from "../types";
 
-export const GeneralActions: IMap<Action> = {};
+export const GeneralActions: Record<string, Action> = {};
 
 const actionNames: Array<string> = [
   "Training",
diff --git a/src/Bladeburner/Skills.ts b/src/Bladeburner/Skills.ts
index a8bc0810c..df56154d2 100644
--- a/src/Bladeburner/Skills.ts
+++ b/src/Bladeburner/Skills.ts
@@ -1,8 +1,7 @@
 import { Skill } from "./Skill";
 import { SkillNames } from "./data/SkillNames";
-import { IMap } from "../types";
 
-export const Skills: IMap<Skill> = {};
+export const Skills: Record<string, Skill> = {};
 
 (function () {
   Skills[SkillNames.BladesIntuition] = new Skill({
diff --git a/src/CodingContracts.ts b/src/CodingContracts.ts
index 0ffa743aa..caf8cba1d 100644
--- a/src/CodingContracts.ts
+++ b/src/CodingContracts.ts
@@ -1,7 +1,5 @@
 import { codingContractTypesMetadata, DescriptionFunc, GeneratorFunc, SolverFunc } from "./data/codingcontracttypes";
 
-import { IMap } from "./types";
-
 import { Generic_fromJSON, Generic_toJSON, IReviverValue, Reviver } from "./utils/JSONReviver";
 import { CodingContractEvent } from "./ui/React/CodingContractModal";
 
@@ -58,7 +56,7 @@ class CodingContractType {
 
 /* Contract Types */
 // tslint:disable-next-line
-export const CodingContractTypes: IMap<CodingContractType> = {};
+export const CodingContractTypes: Record<string, CodingContractType> = {};
 
 for (const md of codingContractTypesMetadata) {
   // tslint:disable-next-line
diff --git a/src/Company/Companies.ts b/src/Company/Companies.ts
index 7ad6d9d39..37721fc81 100644
--- a/src/Company/Companies.ts
+++ b/src/Company/Companies.ts
@@ -1,10 +1,9 @@
 // Constructs all CompanyPosition objects using the metadata in data/companypositions.ts
 import { companiesMetadata } from "./data/CompaniesMetadata";
 import { Company, IConstructorParams } from "./Company";
-import { IMap } from "../types";
 import { Reviver } from "../utils/JSONReviver";
 
-export let Companies: IMap<Company> = {};
+export let Companies: Record<string, Company> = {};
 
 function addCompany(params: IConstructorParams): void {
   if (Companies[params.name] != null) {
diff --git a/src/Company/Company.ts b/src/Company/Company.ts
index 492ed4ad3..70081eaf3 100644
--- a/src/Company/Company.ts
+++ b/src/Company/Company.ts
@@ -2,14 +2,12 @@ import { CompanyPosition } from "./CompanyPosition";
 import * as posNames from "./data/companypositionnames";
 import { favorToRep, repToFavor } from "../Faction/formulas/favor";
 
-import { IMap } from "../types";
-
 import { Generic_fromJSON, Generic_toJSON, IReviverValue, Reviver } from "../utils/JSONReviver";
 
 export interface IConstructorParams {
   name: string;
   info: string;
-  companyPositions: IMap<boolean>;
+  companyPositions: Record<string, boolean>;
   expMultiplier: number;
   salaryMultiplier: number;
   jobStatReqOffset: number;
@@ -48,7 +46,7 @@ export class Company {
    *
    * Must match names of Company Positions, defined in data/companypositionnames.ts
    */
-  companyPositions: IMap<boolean>;
+  companyPositions: Record<string, boolean>;
 
   /**
    * Company-specific multiplier for earnings
diff --git a/src/Company/CompanyPositions.ts b/src/Company/CompanyPositions.ts
index 3075808a4..b4147e116 100644
--- a/src/Company/CompanyPositions.ts
+++ b/src/Company/CompanyPositions.ts
@@ -1,9 +1,8 @@
 // Constructs all CompanyPosition objects using the metadata in data/companypositions.ts
 import { companyPositionMetadata } from "./data/CompanyPositionsMetadata";
 import { CompanyPosition, IConstructorParams } from "./CompanyPosition";
-import { IMap } from "../types";
 
-export const CompanyPositions: IMap<CompanyPosition> = {};
+export const CompanyPositions: Record<string, CompanyPosition> = {};
 
 function addCompanyPosition(params: IConstructorParams): void {
   if (CompanyPositions[params.name] != null) {
diff --git a/src/Company/data/CompaniesMetadata.ts b/src/Company/data/CompaniesMetadata.ts
index 74acb3d6b..85af9e2ca 100644
--- a/src/Company/data/CompaniesMetadata.ts
+++ b/src/Company/data/CompaniesMetadata.ts
@@ -1,30 +1,29 @@
 import * as posNames from "./companypositionnames";
 import { IConstructorParams } from "../Company";
 
-import { IMap } from "../../types";
 import { LocationName } from "../../Locations/data/LocationNames";
 
 // Create Objects containing Company Positions by category
 // Will help in metadata construction later
-const AllSoftwarePositions: IMap<boolean> = {};
-const AllITPositions: IMap<boolean> = {};
-const AllNetworkEngineerPositions: IMap<boolean> = {};
-const SecurityEngineerPositions: IMap<boolean> = {};
-const AllTechnologyPositions: IMap<boolean> = {};
-const AllBusinessPositions: IMap<boolean> = {};
-const AllAgentPositions: IMap<boolean> = {};
-const AllSecurityPositions: IMap<boolean> = {};
-const AllSoftwareConsultantPositions: IMap<boolean> = {};
-const AllBusinessConsultantPositions: IMap<boolean> = {};
-const SoftwarePositionsUpToHeadOfEngineering: IMap<boolean> = {};
-const SoftwarePositionsUpToLeadDeveloper: IMap<boolean> = {};
-const BusinessPositionsUpToOperationsManager: IMap<boolean> = {};
-const WaiterOnly: IMap<boolean> = {};
-const EmployeeOnly: IMap<boolean> = {};
-const PartTimeWaiterOnly: IMap<boolean> = {};
-const PartTimeEmployeeOnly: IMap<boolean> = {};
-const OperationsManagerOnly: IMap<boolean> = {};
-const CEOOnly: IMap<boolean> = {};
+const AllSoftwarePositions: Record<string, boolean> = {};
+const AllITPositions: Record<string, boolean> = {};
+const AllNetworkEngineerPositions: Record<string, boolean> = {};
+const SecurityEngineerPositions: Record<string, boolean> = {};
+const AllTechnologyPositions: Record<string, boolean> = {};
+const AllBusinessPositions: Record<string, boolean> = {};
+const AllAgentPositions: Record<string, boolean> = {};
+const AllSecurityPositions: Record<string, boolean> = {};
+const AllSoftwareConsultantPositions: Record<string, boolean> = {};
+const AllBusinessConsultantPositions: Record<string, boolean> = {};
+const SoftwarePositionsUpToHeadOfEngineering: Record<string, boolean> = {};
+const SoftwarePositionsUpToLeadDeveloper: Record<string, boolean> = {};
+const BusinessPositionsUpToOperationsManager: Record<string, boolean> = {};
+const WaiterOnly: Record<string, boolean> = {};
+const EmployeeOnly: Record<string, boolean> = {};
+const PartTimeWaiterOnly: Record<string, boolean> = {};
+const PartTimeEmployeeOnly: Record<string, boolean> = {};
+const OperationsManagerOnly: Record<string, boolean> = {};
+const CEOOnly: Record<string, boolean> = {};
 
 posNames.SoftwareCompanyPositions.forEach((e) => {
   AllSoftwarePositions[e] = true;
diff --git a/src/Corporation/Actions.ts b/src/Corporation/Actions.ts
index 3b65654a7..5cdfc5e9f 100644
--- a/src/Corporation/Actions.ts
+++ b/src/Corporation/Actions.ts
@@ -14,6 +14,7 @@ import { Cities } from "../Locations/Cities";
 import { EmployeePositions } from "./EmployeePositions";
 import { ResearchMap } from "./ResearchMap";
 import { isRelevantMaterial } from "./ui/Helpers";
+import { checkObjContainsValue } from "../utils/helpers/checkObjContains";
 
 export function NewIndustry(corporation: Corporation, industry: string, name: string): void {
   if (corporation.divisions.find(({ type }) => industry == type))
@@ -303,16 +304,13 @@ export function BuyBackShares(corporation: Corporation, numShares: number): bool
 
 export function AssignJob(office: OfficeSpace, employeeName: string, job: string): void {
   const employee = office.employees.find((e) => e.name === employeeName);
-
   if (!employee) throw new Error(`Could not find employee '${name}'.`);
-  if (!Object.values(EmployeePositions).includes(job)) throw new Error(`'${job}' is not a valid job.`);
-
+  if (!checkObjContainsValue(EmployeePositions, job)) throw new Error(`'${job}' is not a valid job.`)
   office.assignSingleJob(employee, job);
 }
 
 export function AutoAssignJob(office: OfficeSpace, job: string, count: number): boolean {
-  if (!Object.values(EmployeePositions).includes(job)) throw new Error(`'${job}' is not a valid job.`);
-
+  if (!checkObjContainsValue(EmployeePositions, job)) throw new Error(`'${job}' is not a valid job.`)
   return office.autoAssignJob(job, count);
 }
 
diff --git a/src/Corporation/EmployeePositions.ts b/src/Corporation/EmployeePositions.ts
index ed7d524cd..e560314c6 100644
--- a/src/Corporation/EmployeePositions.ts
+++ b/src/Corporation/EmployeePositions.ts
@@ -1,6 +1,4 @@
-import { IMap } from "../types";
-
-export const EmployeePositions: IMap<string> = {
+export const EmployeePositions = {
   Operations: "Operations",
   Engineer: "Engineer",
   Business: "Business",
@@ -8,4 +6,4 @@ export const EmployeePositions: IMap<string> = {
   RandD: "Research & Development",
   Training: "Training",
   Unassigned: "Unassigned",
-};
+} as const;
diff --git a/src/Corporation/MaterialSizes.ts b/src/Corporation/MaterialSizes.ts
index 74a19cb7e..b7e402a54 100644
--- a/src/Corporation/MaterialSizes.ts
+++ b/src/Corporation/MaterialSizes.ts
@@ -1,7 +1,5 @@
-import { IMap } from "../types";
-
 // Map of material (by name) to their sizes (how much space it takes in warehouse)
-export const MaterialSizes: IMap<number> = {
+export const MaterialSizes: Record<string, number> = {
   Water: 0.05,
   Energy: 0.01,
   Food: 0.03,
diff --git a/src/Corporation/Product.ts b/src/Corporation/Product.ts
index e85380372..1700f683f 100644
--- a/src/Corporation/Product.ts
+++ b/src/Corporation/Product.ts
@@ -4,7 +4,6 @@ import { Industry } from "./Industry";
 import { ProductRatingWeights, IProductRatingWeight } from "./ProductRatingWeights";
 
 import { createCityMap } from "../Locations/createCityMap";
-import { IMap } from "../types";
 
 import { Generic_fromJSON, Generic_toJSON, IReviverValue, Reviver } from "../utils/JSONReviver";
 import { getRandomInt } from "../utils/helpers/getRandomInt";
@@ -25,7 +24,7 @@ interface IConstructorParams {
   features?: number;
   loc?: string;
   size?: number;
-  req?: IMap<number>;
+  req?: Record<string, number>;
 }
 
 export class Product {
@@ -81,7 +80,7 @@ export class Product {
   // Data refers to the production, sale, and quantity of the products
   // These values are specific to a city
   // For each city, the data is [qty, prod, sell]
-  data: IMap<number[]> = createCityMap<number[]>([0, 0, 0]);
+  data: Record<string, number[]> = createCityMap<number[]>([0, 0, 0]);
 
   // Location of this Product
   // Only applies for location-based products like restaurants/hospitals
@@ -93,18 +92,18 @@ export class Product {
 
   // Material requirements. An object that maps the name of a material to how much it requires
   // to make 1 unit of the product.
-  reqMats: IMap<number> = {};
+  reqMats: Record<string, number> = {};
 
   // Data to keep track of whether production/sale of this Product is
   // manually limited. These values are specific to a city
   //  [Whether production/sale is limited, limit amount]
-  prdman: IMap<any[]> = createCityMap<any[]>([false, 0]);
-  sllman: IMap<any[]> = createCityMap<any[]>([false, 0]);
+  prdman: Record<string, any[]> = createCityMap<any[]>([false, 0]);
+  sllman: Record<string, any[]> = createCityMap<any[]>([false, 0]);
 
   // Flags that signal whether automatic sale pricing through Market TA is enabled
   marketTa1 = false;
   marketTa2 = false;
-  marketTa2Price: IMap<number> = createCityMap<number>(0);
+  marketTa2Price: Record<string, number> = createCityMap<number>(0);
 
   // Determines the maximum amount of this product that can be sold in one market cycle
   maxsll = 0;
diff --git a/src/Corporation/ProductRatingWeights.ts b/src/Corporation/ProductRatingWeights.ts
index 667a59f0b..01997180f 100644
--- a/src/Corporation/ProductRatingWeights.ts
+++ b/src/Corporation/ProductRatingWeights.ts
@@ -1,5 +1,4 @@
 import { Industries } from "./IndustryData";
-import { IMap } from "../types";
 
 export interface IProductRatingWeight {
   Aesthetics?: number;
@@ -10,7 +9,7 @@ export interface IProductRatingWeight {
   Reliability?: number;
 }
 
-export const ProductRatingWeights: IMap<any> = {
+export const ProductRatingWeights: Record<string, IProductRatingWeight> = {
   [Industries.Food]: {
     Quality: 0.7,
     Durability: 0.1,
diff --git a/src/Corporation/ResearchMap.ts b/src/Corporation/ResearchMap.ts
index 7b2ab3928..606faf3d7 100644
--- a/src/Corporation/ResearchMap.ts
+++ b/src/Corporation/ResearchMap.ts
@@ -2,9 +2,8 @@
 // as values. They are identified by their names
 import { Research, IConstructorParams } from "./Research";
 import { researchMetadata } from "./data/ResearchMetadata";
-import { IMap } from "../types";
 
-export const ResearchMap: IMap<Research> = {};
+export const ResearchMap: Record<string, Research> = {};
 
 function addResearch(p: IConstructorParams): void {
   if (ResearchMap[p.name] != null) {
diff --git a/src/Corporation/ResearchTree.ts b/src/Corporation/ResearchTree.ts
index a76d2aaa1..82313d107 100644
--- a/src/Corporation/ResearchTree.ts
+++ b/src/Corporation/ResearchTree.ts
@@ -6,8 +6,6 @@
 import { Research } from "./Research";
 import { ResearchMap } from "./ResearchMap";
 
-import { IMap } from "../types";
-
 interface IConstructorParams {
   children?: Node[];
   cost: number;
@@ -86,7 +84,7 @@ export class Node {
 // The root node in a Research Tree must always be the "Hi-Tech R&D Laboratory"
 export class ResearchTree {
   // Object containing names of all acquired Research by name
-  researched: IMap<boolean> = {};
+  researched: Record<string, boolean> = {};
 
   // Root Node
   root: Node | null = null;
diff --git a/src/Corporation/Warehouse.ts b/src/Corporation/Warehouse.ts
index 874651399..8edbe3cfa 100644
--- a/src/Corporation/Warehouse.ts
+++ b/src/Corporation/Warehouse.ts
@@ -2,7 +2,6 @@ import { Material } from "./Material";
 import { Corporation } from "./Corporation";
 import { Industry } from "./Industry";
 import { MaterialSizes } from "./MaterialSizes";
-import { IMap } from "../types";
 import { Generic_fromJSON, Generic_toJSON, IReviverValue, Reviver } from "../utils/JSONReviver";
 import { exceptionAlert } from "../utils/helpers/exceptionAlert";
 
@@ -21,7 +20,7 @@ export class Warehouse {
   loc: string;
 
   // Map of Materials held by this Warehouse
-  materials: IMap<Material>;
+  materials: Record<string, Material>;
 
   // Maximum amount warehouse can hold
   size: number;
diff --git a/src/Crime/Crimes.ts b/src/Crime/Crimes.ts
index d1f24b646..b3cf29060 100644
--- a/src/Crime/Crimes.ts
+++ b/src/Crime/Crimes.ts
@@ -1,11 +1,10 @@
 import { Crime } from "./Crime";
 
 import { CONSTANTS } from "../Constants";
-import { IMap } from "../types";
 
 import { CrimeType } from "../utils/WorkType";
 
-export const Crimes: IMap<Crime> = {
+export const Crimes: Record<string, Crime> = {
   Shoplift: new Crime("Shoplift", "to shoplift", CrimeType.SHOPLIFT, 2e3, 15e3, 1 / 20, 0.1, {
     dexterity_success_weight: 1,
     agility_success_weight: 1,
diff --git a/src/DarkWeb/DarkWebItems.ts b/src/DarkWeb/DarkWebItems.ts
index 191540fbf..1af0c4226 100644
--- a/src/DarkWeb/DarkWebItems.ts
+++ b/src/DarkWeb/DarkWebItems.ts
@@ -1,8 +1,7 @@
 import { DarkWebItem } from "./DarkWebItem";
-import { IMap } from "../types";
 import { Programs, initPrograms } from "../Programs/Programs";
 
-export const DarkWebItems: IMap<DarkWebItem> = {};
+export const DarkWebItems: Record<string, DarkWebItem> = {};
 export function initDarkWebItems() {
   initPrograms();
   Object.assign(DarkWebItems, {
diff --git a/src/DevMenu/ui/SaveFile.tsx b/src/DevMenu/ui/SaveFile.tsx
index 8f7d9003b..0d2ff3391 100644
--- a/src/DevMenu/ui/SaveFile.tsx
+++ b/src/DevMenu/ui/SaveFile.tsx
@@ -7,7 +7,7 @@ import ExpandMoreIcon from "@mui/icons-material/ExpandMore";
 
 import Typography from "@mui/material/Typography";
 import { saveObject } from "../../SaveObject";
-import { SnackbarEvents, ToastVariant } from "../../ui/React/Snackbar";
+import { SnackbarEvents } from "../../ui/React/Snackbar";
 import { Upload } from "@mui/icons-material";
 import { Button } from "@mui/material";
 import { OptionSwitch } from "../../ui/React/OptionSwitch";
@@ -25,7 +25,7 @@ export function SaveFile(): React.ReactElement {
       const save = atob(base64Save);
       setSaveFile(save);
     } catch (e: unknown) {
-      SnackbarEvents.emit(String(e), ToastVariant.ERROR, 5000);
+      SnackbarEvents.emit(String(e), "error", 5000);
     }
   }
 
diff --git a/src/Electron.tsx b/src/Electron.tsx
index a07621afc..89d61112c 100644
--- a/src/Electron.tsx
+++ b/src/Electron.tsx
@@ -3,7 +3,7 @@ import { Router } from "./ui/GameRoot";
 import { removeLeadingSlash } from "./Terminal/DirectoryHelpers";
 import { Terminal } from "./Terminal";
 import { SnackbarEvents, ToastVariant } from "./ui/React/Snackbar";
-import { IMap, IReturnStatus } from "./types";
+import { IReturnStatus } from "./types";
 import { GetServer } from "./Server/AllServers";
 import { ImportPlayerData, SaveData, saveObject } from "./SaveObject";
 import { Settings } from "./Settings/Settings";
@@ -125,7 +125,7 @@ function initWebserver(): void {
 function initAppNotifier(): void {
   const funcs = {
     terminal: (message: string, type?: string) => {
-      const typesFn: IMap<(s: string) => void> = {
+      const typesFn: Record<string, (s: string) => void> = {
         info: Terminal.info,
         warn: Terminal.warn,
         error: Terminal.error,
@@ -151,7 +151,7 @@ function initSaveFunctions(): void {
         saveObject.exportGame();
       } catch (error) {
         console.error(error);
-        SnackbarEvents.emit("Could not export game.", ToastVariant.ERROR, 2000);
+        SnackbarEvents.emit("Could not export game.", "error", 2000);
       }
     },
     triggerScriptsExport: (): void => exportScripts("*", Player.getHomeComputer()),
@@ -203,7 +203,7 @@ function initElectronBridge(): void {
       })
       .catch((error: unknown) => {
         console.error(error);
-        SnackbarEvents.emit("Could not save game.", ToastVariant.ERROR, 2000);
+        SnackbarEvents.emit("Could not save game.", "error", 2000);
       });
   });
   bridge.receive("trigger-game-export", () => {
@@ -211,7 +211,7 @@ function initElectronBridge(): void {
       window.appSaveFns.triggerGameExport();
     } catch (error) {
       console.error(error);
-      SnackbarEvents.emit("Could not export game.", ToastVariant.ERROR, 2000);
+      SnackbarEvents.emit("Could not export game.", "error", 2000);
     }
   });
   bridge.receive("trigger-scripts-export", () => {
@@ -219,7 +219,7 @@ function initElectronBridge(): void {
       window.appSaveFns.triggerScriptsExport();
     } catch (error) {
       console.error(error);
-      SnackbarEvents.emit("Could not export scripts.", ToastVariant.ERROR, 2000);
+      SnackbarEvents.emit("Could not export scripts.", "error", 2000);
     }
   });
 }
diff --git a/src/Faction/FactionInfo.tsx b/src/Faction/FactionInfo.tsx
index 0a63d868d..1dfd62b5a 100644
--- a/src/Faction/FactionInfo.tsx
+++ b/src/Faction/FactionInfo.tsx
@@ -1,5 +1,4 @@
 import React from "react";
-import { IMap } from "../types";
 import { FactionNames } from "./data/FactionNames";
 import { Router } from "../ui/GameRoot";
 import { Option } from "./ui/Option";
@@ -81,7 +80,7 @@ export class FactionInfo {
  * A map of all factions and associated info to them.
  */
 // tslint:disable-next-line:variable-name
-export const FactionInfos: IMap<FactionInfo> = {
+export const FactionInfos: Record<string, FactionInfo> = {
   // Endgame
   [FactionNames.Illuminati]: new FactionInfo({
     infoText: (
diff --git a/src/Faction/Factions.ts b/src/Faction/Factions.ts
index 7469dee72..f0dd88620 100644
--- a/src/Faction/Factions.ts
+++ b/src/Faction/Factions.ts
@@ -5,11 +5,9 @@
 import { Faction } from "./Faction";
 import { FactionInfos } from "./FactionInfo";
 
-import { IMap } from "../types";
-
 import { Reviver } from "../utils/JSONReviver";
 
-export let Factions: IMap<Faction> = {};
+export let Factions: Record<string, Faction> = {};
 
 export function loadFactions(saveString: string): void {
   Factions = JSON.parse(saveString, Reviver);
diff --git a/src/GameOptions/ui/GameOptionsSidebar.tsx b/src/GameOptions/ui/GameOptionsSidebar.tsx
index 5c8d707ff..2cfc90f77 100644
--- a/src/GameOptions/ui/GameOptionsSidebar.tsx
+++ b/src/GameOptions/ui/GameOptionsSidebar.tsx
@@ -19,7 +19,7 @@ import { StyleEditorButton } from "../../Themes/ui/StyleEditorButton";
 import { ThemeEditorButton } from "../../Themes/ui/ThemeEditorButton";
 import { ConfirmationModal } from "../../ui/React/ConfirmationModal";
 import { DeleteGameButton } from "../../ui/React/DeleteGameButton";
-import { SnackbarEvents, ToastVariant } from "../../ui/React/Snackbar";
+import { SnackbarEvents } from "../../ui/React/Snackbar";
 import { SoftResetButton } from "../../ui/React/SoftResetButton";
 import { Router } from "../../ui/GameRoot";
 import { convertTimeMsToTimeElapsedString } from "../../utils/StringHelperFunctions";
@@ -72,7 +72,7 @@ export const GameOptionsSidebar = (props: IProps): React.ReactElement => {
       setImportData(data);
       setImportSaveOpen(true);
     } catch (e: unknown) {
-      SnackbarEvents.emit(String(e), ToastVariant.ERROR, 5000);
+      SnackbarEvents.emit(String(e), "error", 5000);
     }
   }
 
@@ -82,7 +82,7 @@ export const GameOptionsSidebar = (props: IProps): React.ReactElement => {
     try {
       await saveObject.importGame(importData.base64);
     } catch (e: unknown) {
-      SnackbarEvents.emit(String(e), ToastVariant.ERROR, 5000);
+      SnackbarEvents.emit(String(e), "error", 5000);
     }
 
     setImportSaveOpen(false);
diff --git a/src/Hacknet/HashManager.ts b/src/Hacknet/HashManager.ts
index 8d12051d4..85d3ecd0a 100644
--- a/src/Hacknet/HashManager.ts
+++ b/src/Hacknet/HashManager.ts
@@ -9,7 +9,6 @@
 import { HashUpgrades } from "./HashUpgrades";
 import { HashUpgrade } from "./HashUpgrade";
 
-import { IMap } from "../types";
 import { Generic_fromJSON, Generic_toJSON, IReviverValue, Reviver } from "../utils/JSONReviver";
 
 export class HashManager {
@@ -21,7 +20,7 @@ export class HashManager {
   hashes = 0;
 
   // Map of Hash Upgrade Name -> levels in that upgrade
-  upgrades: IMap<number> = {};
+  upgrades: Record<string, number> = {};
 
   constructor() {
     for (const name of Object.keys(HashUpgrades)) {
diff --git a/src/Hacknet/HashUpgrades.ts b/src/Hacknet/HashUpgrades.ts
index 59b8644dd..6b817824b 100644
--- a/src/Hacknet/HashUpgrades.ts
+++ b/src/Hacknet/HashUpgrades.ts
@@ -4,9 +4,8 @@
  */
 import { HashUpgrade, IConstructorParams } from "./HashUpgrade";
 import { HashUpgradesMetadata } from "./data/HashUpgradesMetadata";
-import { IMap } from "../types";
 
-export const HashUpgrades: IMap<HashUpgrade> = {};
+export const HashUpgrades: Record<string, HashUpgrade> = {};
 
 function createHashUpgrade(p: IConstructorParams): void {
   HashUpgrades[p.name] = new HashUpgrade(p);
diff --git a/src/Literature/Literatures.ts b/src/Literature/Literatures.ts
index 8f923edf7..3df893a24 100644
--- a/src/Literature/Literatures.ts
+++ b/src/Literature/Literatures.ts
@@ -1,10 +1,9 @@
 import { CityName } from "./../Locations/data/CityNames";
 import { Literature } from "./Literature";
 import { LiteratureNames } from "./data/LiteratureNames";
-import { IMap } from "../types";
 import { FactionNames } from "../Faction/data/FactionNames";
 
-export const Literatures: IMap<Literature> = {};
+export const Literatures: Record<string, Literature> = {};
 
 (function () {
   let title, fn, txt;
diff --git a/src/Literature/data/LiteratureNames.ts b/src/Literature/data/LiteratureNames.ts
index 4d1a2c49e..712134bd5 100644
--- a/src/Literature/data/LiteratureNames.ts
+++ b/src/Literature/data/LiteratureNames.ts
@@ -1,6 +1,4 @@
-import { IMap } from "../../types";
-
-export const LiteratureNames: IMap<string> = {
+export const LiteratureNames = {
   HackersStartingHandbook: "hackers-starting-handbook.lit",
   CorporationManagementHandbook: "corporation-management-handbook.lit",
   HistoryOfSynthoids: "history-of-synthoids.lit",
@@ -22,4 +20,4 @@ export const LiteratureNames: IMap<string> = {
   TheNewGod: "the-new-god.lit",
   NewTriads: "new-triads.lit",
   TheSecretWar: "the-secret-war.lit",
-};
+} as const;
diff --git a/src/Locations/Cities.ts b/src/Locations/Cities.ts
index 1ec9d970a..058108950 100644
--- a/src/Locations/Cities.ts
+++ b/src/Locations/Cities.ts
@@ -3,6 +3,5 @@
  * Key = City Name, Value = City object
  */
 import { City } from "./City";
-import { IMap } from "../types";
 
-export const Cities: IMap<City> = {};
+export const Cities: Record<string, City> = {};
diff --git a/src/Locations/Locations.ts b/src/Locations/Locations.ts
index 33da0eade..9171f893f 100644
--- a/src/Locations/Locations.ts
+++ b/src/Locations/Locations.ts
@@ -8,9 +8,7 @@ import { Location, IConstructorParams } from "./Location";
 import { CityName } from "./data/CityNames";
 import { LocationsMetadata } from "./data/LocationsMetadata";
 
-import { IMap } from "../types";
-
-export const Locations: IMap<Location> = {};
+export const Locations: Record<string, Location> = {};
 
 /**
  * Here, we'll initialize both Locations and Cities data. These can both
diff --git a/src/Locations/createCityMap.ts b/src/Locations/createCityMap.ts
index 590da9305..91b4cbf5b 100644
--- a/src/Locations/createCityMap.ts
+++ b/src/Locations/createCityMap.ts
@@ -5,10 +5,9 @@
  * This map uses the official name of the city, NOT its key in the 'Cities' object
  */
 import { Cities } from "./Cities";
-import { IMap } from "../types";
 
-export function createCityMap<T>(initValue: T): IMap<T> {
-  const map: IMap<T> = {};
+export function createCityMap<T>(initValue: T): Record<string, T> {
+  const map: Record<string, T> = {};
   const cities = Object.keys(Cities);
   for (let i = 0; i < cities.length; ++i) {
     map[cities[i]] = initValue;
diff --git a/src/Locations/ui/SpecialLocation.tsx b/src/Locations/ui/SpecialLocation.tsx
index 0b12edf82..e003cd1f7 100644
--- a/src/Locations/ui/SpecialLocation.tsx
+++ b/src/Locations/ui/SpecialLocation.tsx
@@ -25,7 +25,7 @@ import { Router } from "../../ui/GameRoot";
 import { Player } from "../../Player";
 
 import { dialogBoxCreate } from "../../ui/React/DialogBox";
-import { SnackbarEvents, ToastVariant } from "../../ui/React/Snackbar";
+import { SnackbarEvents } from "../../ui/React/Snackbar";
 import { N00dles } from "../../utils/helpers/N00dles";
 import { Exploit } from "../../Exploits/Exploit";
 import { applyAugmentation } from "../../Augmentation/AugmentationHelpers";
@@ -95,7 +95,7 @@ export function SpecialLocation(props: IProps): React.ReactElement {
 
   function renderNoodleBar(): React.ReactElement {
     function EatNoodles(): void {
-      SnackbarEvents.emit("You ate some delicious noodles and feel refreshed", ToastVariant.SUCCESS, 2000);
+      SnackbarEvents.emit("You ate some delicious noodles and feel refreshed", "success", 2000);
       N00dles(); // This is the true power of the noodles.
       if (Player.sourceFiles.length > 0) Player.giveExploit(Exploit.N00dles);
       if (Player.sourceFileLvl(5) > 0 || Player.bitNodeN === 5) {
diff --git a/src/Netscript/RamCostGenerator.ts b/src/Netscript/RamCostGenerator.ts
index c6b04629f..280c3b417 100644
--- a/src/Netscript/RamCostGenerator.ts
+++ b/src/Netscript/RamCostGenerator.ts
@@ -1,5 +1,4 @@
 import { Player } from "../Player";
-import { IMap } from "../types";
 
 import { NS as INS } from "../ScriptEditor/NetscriptDefinitions";
 import { INetscriptExtra } from "../NetscriptFunctions/Extra";
@@ -15,7 +14,7 @@ type RamCostTree<API> = {
 // TODO remember to update RamCalculations.js and WorkerScript.js
 
 // RAM costs for Netscript functions
-export const RamCostConstants: IMap<number> = {
+export const RamCostConstants: Record<string, number> = {
   ScriptBaseRamCost: 1.6,
   ScriptDomRamCost: 25,
   ScriptCorporationRamCost: 1024 - 1.6,
@@ -604,7 +603,7 @@ const SourceRamCosts = {
   },
 };
 
-export const RamCosts: IMap<any> = SourceRamCosts;
+export const RamCosts: Record<string, any> = SourceRamCosts;
 
 // This line in particular is there so typescript typechecks that we are not missing any static ram cost.
 // eslint-disable-next-line @typescript-eslint/no-unused-vars
diff --git a/src/Netscript/WorkerScript.ts b/src/Netscript/WorkerScript.ts
index 3ef23d884..238b0be43 100644
--- a/src/Netscript/WorkerScript.ts
+++ b/src/Netscript/WorkerScript.ts
@@ -13,7 +13,6 @@ import { RunningScript } from "../Script/RunningScript";
 import { Script } from "../Script/Script";
 import { GetServer } from "../Server/AllServers";
 import { BaseServer } from "../Server/BaseServer";
-import { IMap } from "../types";
 import { NS } from "../ScriptEditor/NetscriptDefinitions";
 import { ScriptDeath } from "./ScriptDeath";
 import { ScriptArg } from "./ScriptArg";
@@ -43,14 +42,14 @@ export class WorkerScript {
   /**
    * Stores names of all functions that have logging disabled
    */
-  disableLogs: IMap<boolean> = {};
+  disableLogs: Record<string, boolean> = {};
 
   /**
    * Used for dynamic RAM calculation. Stores names of all functions that have
    * already been checked by this script.
    * TODO: Could probably just combine this with loadedFns?
    */
-  dynamicLoadedFns: IMap<boolean> = {};
+  dynamicLoadedFns: Record<string, boolean> = {};
 
   /**
    * Tracks dynamic RAM usage
@@ -71,7 +70,7 @@ export class WorkerScript {
    * Used for static RAM calculation. Stores names of all functions that have
    * already been checked by this script
    */
-  loadedFns: IMap<boolean> = {};
+  loadedFns: Record<string, boolean> = {};
 
   /**
    * Filename of script
diff --git a/src/NetscriptFunctions.ts b/src/NetscriptFunctions.ts
index 143515678..c15235c54 100644
--- a/src/NetscriptFunctions.ts
+++ b/src/NetscriptFunctions.ts
@@ -71,7 +71,7 @@ import { NetscriptSingularity } from "./NetscriptFunctions/Singularity";
 
 import { dialogBoxCreate } from "./ui/React/DialogBox";
 import { SnackbarEvents, ToastVariant } from "./ui/React/Snackbar";
-import { checkEnum } from "./utils/helpers/checkEnum";
+import { checkObjContainsValue } from "./utils/helpers/checkObjContains";
 
 import { Flags } from "./NetscriptFunctions/Flags";
 import { calculateIntelligenceBonus } from "./PersonObjects/formulas/intelligence";
@@ -80,7 +80,17 @@ import { recentScripts } from "./Netscript/RecentScripts";
 import { InternalAPI, NetscriptContext, wrapAPI } from "./Netscript/APIWrapper";
 import { INetscriptExtra } from "./NetscriptFunctions/Extra";
 import { ScriptDeath } from "./Netscript/ScriptDeath";
+import { TypeEquality, ValuesFrom } from "./types";
 
+// "Enums" as object
+export const enums = {
+  toast: {
+    SUCCESS: "success",
+    WARNING: "warning",
+    ERROR: "error",
+    INFO: "info",
+  } as const,
+};
 export type NSFull = NS & INetscriptExtra;
 
 export function NetscriptFunctions(workerScript: WorkerScript): NSFull {
@@ -89,10 +99,8 @@ export function NetscriptFunctions(workerScript: WorkerScript): NSFull {
 
 const base: InternalAPI<NS> = {
   args: [],
-  enums: {
-    toast: ToastVariant,
-  },
-
+  //The next line will error if enums does not match the definition in NetscriptDefinitions.d.ts
+  enums,
   singularity: NetscriptSingularity(),
   gang: NetscriptGang(),
   bladeburner: NetscriptBladeburner(),
@@ -1782,12 +1790,12 @@ const base: InternalAPI<NS> = {
     },
   toast:
     (ctx: NetscriptContext) =>
-    (_message: unknown, _variant: unknown = ToastVariant.SUCCESS, _duration: unknown = 2000): void => {
+    (_message: unknown, _variant: unknown = enums.toast.SUCCESS, _duration: unknown = 2000): void => {
       const message = helpers.string(ctx, "message", _message);
       const variant = helpers.string(ctx, "variant", _variant);
       const duration = _duration === null ? null : helpers.number(ctx, "duration", _duration);
-      if (!checkEnum(ToastVariant, variant))
-        throw new Error(`variant must be one of ${Object.values(ToastVariant).join(", ")}`);
+      if (!checkObjContainsValue(enums.toast, variant))
+        throw new Error(`variant must be one of ${Object.values(enums.toast).join(", ")}`);
       SnackbarEvents.emit(message, variant, duration);
     },
   prompt:
diff --git a/src/NetscriptFunctions/Corporation.ts b/src/NetscriptFunctions/Corporation.ts
index 8c0940245..23c82bf0e 100644
--- a/src/NetscriptFunctions/Corporation.ts
+++ b/src/NetscriptFunctions/Corporation.ts
@@ -66,6 +66,7 @@ import { Factions } from "../Faction/Factions";
 import { BitNodeMultipliers } from "../BitNode/BitNodeMultipliers";
 import { InternalAPI, NetscriptContext } from "../Netscript/APIWrapper";
 import { helpers } from "../Netscript/NetscriptHelpers";
+import { checkObjContainsValue } from "../utils/helpers/checkObjContains";
 
 export function NetscriptCorporation(): InternalAPI<NSCorporation> {
   function createCorporation(corporationName: string, selfFund = true): boolean {
@@ -711,7 +712,7 @@ export function NetscriptCorporation(): InternalAPI<NSCorporation> {
         const employeeName = helpers.string(ctx, "employeeName", _employeeName);
         const job = helpers.string(ctx, "job", _job);
 
-        if (!Object.values(EmployeePositions).includes(job)) throw new Error(`'${job}' is not a valid job.`);
+        if (!checkObjContainsValue(EmployeePositions, job)) throw new Error(`'${job}' is not a valid job.`);
         const office = getOffice(divisionName, cityName);
 
         AssignJob(office, employeeName, job);
@@ -725,7 +726,7 @@ export function NetscriptCorporation(): InternalAPI<NSCorporation> {
         const amount = helpers.number(ctx, "amount", _amount);
         const job = helpers.string(ctx, "job", _job);
 
-        if (!Object.values(EmployeePositions).includes(job)) throw new Error(`'${job}' is not a valid job.`);
+        if (!checkObjContainsValue(EmployeePositions,job)) throw new Error(`'${job}' is not a valid job.`);
         const office = getOffice(divisionName, cityName);
 
         return AutoAssignJob(office, job, amount);
diff --git a/src/NetscriptFunctions/Infiltration.ts b/src/NetscriptFunctions/Infiltration.ts
index 620e5a4bf..dd419a11c 100644
--- a/src/NetscriptFunctions/Infiltration.ts
+++ b/src/NetscriptFunctions/Infiltration.ts
@@ -14,7 +14,7 @@ import {
 import { FactionNames } from "../Faction/data/FactionNames";
 import { Factions } from "../Faction/Factions";
 import { InternalAPI, NetscriptContext } from "../Netscript/APIWrapper";
-import { checkEnum } from "../utils/helpers/checkEnum";
+import { checkObjContainsValue } from "../utils/helpers/checkObjContains";
 import { LocationName } from "../Locations/data/LocationNames";
 import { helpers } from "../Netscript/NetscriptHelpers";
 
@@ -24,7 +24,7 @@ export function NetscriptInfiltration(): InternalAPI<IInfiltration> {
   );
 
   const calculateInfiltrationData = (ctx: NetscriptContext, locationName: string): InfiltrationLocation => {
-    if (!checkEnum(LocationName, locationName)) throw new Error(`Location '${locationName}' does not exists.`);
+    if (!checkObjContainsValue(LocationName, locationName)) throw new Error(`Location '${locationName}' does not exists.`);
     const location = Locations[locationName];
     if (location === undefined) throw helpers.makeRuntimeErrorMsg(ctx, `Location '${location}' does not exists.`);
     if (location.infiltrationData === undefined)
diff --git a/src/NetscriptFunctions/Sleeve.ts b/src/NetscriptFunctions/Sleeve.ts
index db24151dd..1359b36d6 100644
--- a/src/NetscriptFunctions/Sleeve.ts
+++ b/src/NetscriptFunctions/Sleeve.ts
@@ -11,7 +11,7 @@ import {
   SleeveSkills,
   SleeveTask,
 } from "../ScriptEditor/NetscriptDefinitions";
-import { checkEnum } from "../utils/helpers/checkEnum";
+import { checkObjContainsValue } from "../utils/helpers/checkObjContains";
 import { InternalAPI, NetscriptContext } from "../Netscript/APIWrapper";
 import { isSleeveBladeburnerWork } from "../PersonObjects/Sleeve/Work/SleeveBladeburnerWork";
 import { isSleeveFactionWork } from "../PersonObjects/Sleeve/Work/SleeveFactionWork";
@@ -102,7 +102,7 @@ export function NetscriptSleeve(): InternalAPI<ISleeve> {
         const cityName = helpers.string(ctx, "cityName", _cityName);
         checkSleeveAPIAccess(ctx);
         checkSleeveNumber(ctx, sleeveNumber);
-        if (checkEnum(CityName, cityName)) {
+        if (checkObjContainsValue(CityName, cityName)) {
           return Player.sleeves[sleeveNumber].travel(cityName);
         } else {
           throw helpers.makeRuntimeErrorMsg(ctx, `Invalid city name: '${cityName}'.`);
diff --git a/src/PersonObjects/Player/PlayerObject.ts b/src/PersonObjects/Player/PlayerObject.ts
index 6d5e31182..faa16699d 100644
--- a/src/PersonObjects/Player/PlayerObject.ts
+++ b/src/PersonObjects/Player/PlayerObject.ts
@@ -6,7 +6,6 @@ import * as generalMethods from "./PlayerObjectGeneralMethods";
 import * as serverMethods from "./PlayerObjectServerMethods";
 import * as workMethods from "./PlayerObjectWorkMethods";
 
-import { IMap } from "../../types";
 import { Sleeve } from "../Sleeve/Sleeve";
 import { PlayerOwnedSourceFile } from "../../SourceFile/PlayerOwnedSourceFile";
 import { Exploit } from "../../Exploits/Exploit";
@@ -43,7 +42,7 @@ export class PlayerObject extends Person {
   hashManager = new HashManager();
   hasTixApiAccess = false;
   hasWseAccount = false;
-  jobs: IMap<string> = {};
+  jobs: Record<string, string> = {};
   karma = 0;
   numPeopleKilled = 0;
   location = LocationName.TravelAgency;
diff --git a/src/PersonObjects/Player/PlayerObjectGeneralMethods.ts b/src/PersonObjects/Player/PlayerObjectGeneralMethods.ts
index 21dde3745..bc378cfa9 100644
--- a/src/PersonObjects/Player/PlayerObjectGeneralMethods.ts
+++ b/src/PersonObjects/Player/PlayerObjectGeneralMethods.ts
@@ -39,7 +39,7 @@ import { numeralWrapper } from "../../ui/numeralFormat";
 import { MoneySourceTracker } from "../../utils/MoneySourceTracker";
 import { dialogBoxCreate } from "../../ui/React/DialogBox";
 
-import { SnackbarEvents, ToastVariant } from "../../ui/React/Snackbar";
+import { SnackbarEvents } from "../../ui/React/Snackbar";
 import { achievements } from "../../Achievements/Achievements";
 import { FactionNames } from "../../Faction/data/FactionNames";
 
@@ -257,7 +257,7 @@ export function takeDamage(this: PlayerObject, amt: number): boolean {
 
 export function hospitalize(this: PlayerObject): number {
   const cost = getHospitalizationCost();
-  SnackbarEvents.emit(`You've been Hospitalized for ${numeralWrapper.formatMoney(cost)}`, ToastVariant.WARNING, 2000);
+  SnackbarEvents.emit(`You've been Hospitalized for ${numeralWrapper.formatMoney(cost)}`, "warning", 2000);
 
   this.loseMoney(cost, "hospitalization");
   this.hp.current = this.hp.max;
@@ -1193,7 +1193,7 @@ export function canAccessGrafting(this: PlayerObject): boolean {
 export function giveExploit(this: PlayerObject, exploit: Exploit): void {
   if (!this.exploits.includes(exploit)) {
     this.exploits.push(exploit);
-    SnackbarEvents.emit("SF -1 acquired!", ToastVariant.SUCCESS, 2000);
+    SnackbarEvents.emit("SF -1 acquired!", "success", 2000);
   }
 }
 
@@ -1202,7 +1202,7 @@ export function giveAchievement(this: PlayerObject, achievementId: string): void
   if (!achievement) return;
   if (!this.achievements.map((a) => a.ID).includes(achievementId)) {
     this.achievements.push({ ID: achievementId, unlockedOn: new Date().getTime() });
-    SnackbarEvents.emit(`Unlocked Achievement: "${achievement.Name}"`, ToastVariant.SUCCESS, 2000);
+    SnackbarEvents.emit(`Unlocked Achievement: "${achievement.Name}"`, "success", 2000);
   }
 }
 
diff --git a/src/Programs/Programs.ts b/src/Programs/Programs.ts
index c6885dbaa..5c457de21 100644
--- a/src/Programs/Programs.ts
+++ b/src/Programs/Programs.ts
@@ -1,8 +1,7 @@
 import { Program } from "./Program";
 import { programsMetadata } from "./data/ProgramsMetadata";
-import { IMap } from "../types";
 
-export const Programs: IMap<Program> = {};
+export const Programs: Record<string, Program> = {};
 export function initPrograms() {
   for (const params of programsMetadata) {
     Programs[params.key] = new Program(params.name, params.create, params.run);
diff --git a/src/RemoteFileAPI/Remote.ts b/src/RemoteFileAPI/Remote.ts
index ed83fbc21..5a5806a65 100644
--- a/src/RemoteFileAPI/Remote.ts
+++ b/src/RemoteFileAPI/Remote.ts
@@ -1,6 +1,6 @@
 import { RFAMessage } from "./MessageDefinitions";
 import { RFARequestHandler } from "./MessageHandlers";
-import { SnackbarEvents, ToastVariant } from "../ui/React/Snackbar";
+import { SnackbarEvents } from "../ui/React/Snackbar";
 
 export class Remote {
   connection?: WebSocket;
@@ -22,18 +22,18 @@ export class Remote {
     this.connection = new WebSocket(address);
 
     this.connection.addEventListener("error", (e: Event) =>
-      SnackbarEvents.emit(`Error with websocket ${address}, details: ${JSON.stringify(e)}`, ToastVariant.ERROR, 5000),
+      SnackbarEvents.emit(`Error with websocket ${address}, details: ${JSON.stringify(e)}`, "error", 5000),
     );
     this.connection.addEventListener("message", handleMessageEvent);
     this.connection.addEventListener("open", () =>
       SnackbarEvents.emit(
         `Remote API connection established on ${this.ipaddr}:${this.port}`,
-        ToastVariant.SUCCESS,
+        "success",
         2000,
       ),
     );
     this.connection.addEventListener("close", () =>
-      SnackbarEvents.emit("Remote API connection closed", ToastVariant.WARNING, 2000),
+      SnackbarEvents.emit("Remote API connection closed", "warning", 2000),
     );
   }
 }
diff --git a/src/SaveObject.tsx b/src/SaveObject.tsx
index 8262f1faf..9b1c47faf 100755
--- a/src/SaveObject.tsx
+++ b/src/SaveObject.tsx
@@ -16,7 +16,7 @@ import { Settings } from "./Settings/Settings";
 import { loadStockMarket, StockMarket } from "./StockMarket/StockMarket";
 import { staneksGift, loadStaneksGift } from "./CotMG/Helper";
 
-import { SnackbarEvents, ToastVariant } from "./ui/React/Snackbar";
+import { SnackbarEvents } from "./ui/React/Snackbar";
 
 import * as ExportBonus from "./ExportBonus";
 
@@ -120,7 +120,7 @@ class BitburnerSaveObject {
           pushGameSaved(saveData);
 
           if (emitToastEvent) {
-            SnackbarEvents.emit("Game Saved!", ToastVariant.INFO, 2000);
+            SnackbarEvents.emit("Game Saved!", "info", 2000);
           }
           return resolve();
         })
@@ -707,13 +707,9 @@ function loadGame(saveString: string): boolean {
   }
   if (saveObj.hasOwnProperty("SettingsSave")) {
     try {
+      // Try to set saved settings. 
       Settings.load(saveObj.SettingsSave);
-    } catch (e) {
-      console.error("ERROR: Failed to parse Settings. Re-initing default values");
-      Settings.init();
-    }
-  } else {
-    Settings.init();
+    } catch (e) {}
   }
   if (saveObj.hasOwnProperty("LastExportBonus")) {
     try {
diff --git a/src/Script/RunningScript.ts b/src/Script/RunningScript.ts
index c51cd83c6..78af0583b 100644
--- a/src/Script/RunningScript.ts
+++ b/src/Script/RunningScript.ts
@@ -5,7 +5,6 @@
 import { Script } from "./Script";
 import { ScriptUrl } from "./ScriptUrl";
 import { Settings } from "../Settings/Settings";
-import { IMap } from "../types";
 import { Terminal } from "../Terminal";
 
 import { Generic_fromJSON, Generic_toJSON, IReviverValue, Reviver } from "../utils/JSONReviver";
@@ -18,7 +17,7 @@ export class RunningScript {
 
   // Map of [key: hostname] -> Hacking data. Used for offline progress calculations.
   // Hacking data format: [MoneyStolen, NumTimesHacked, NumTimesGrown, NumTimesWeaken]
-  dataMap: IMap<number[]> = {};
+  dataMap: Record<string, number[]> = {};
 
   // Script filename
   filename = "";
diff --git a/src/ScriptEditor/NetscriptDefinitions.d.ts b/src/ScriptEditor/NetscriptDefinitions.d.ts
index 7599e4fc8..a6efb5bd4 100644
--- a/src/ScriptEditor/NetscriptDefinitions.d.ts
+++ b/src/ScriptEditor/NetscriptDefinitions.d.ts
@@ -6573,22 +6573,16 @@ export interface NS {
   enums: NSEnums;
 }
 
-/** @public */
-export enum ToastVariant {
-  SUCCESS = "success",
-  WARNING = "warning",
-  ERROR = "error",
-  INFO = "info",
-}
-
-/** @public */
-export type ToastVariantValues = `${ToastVariant}`;
-
-/** @public */
-export interface NSEnums {
-  toast: typeof ToastVariant;
-}
+export const enums = {
+  toast: {
+    SUCCESS: "success",
+    WARNING: "warning",
+    ERROR: "error",
+    INFO: "info",
+  },
+} as const;
 
+export type NSEnums = typeof enums;
 /**
  * Corporation Office API
  * @remarks
diff --git a/src/Server/AllServers.ts b/src/Server/AllServers.ts
index 580213bc5..13727c4da 100644
--- a/src/Server/AllServers.ts
+++ b/src/Server/AllServers.ts
@@ -4,7 +4,7 @@ import { serverMetadata } from "./data/servers";
 
 import { HacknetServer } from "../Hacknet/HacknetServer";
 
-import { IMap, IMinMaxRange } from "../types";
+import { IMinMaxRange } from "../types";
 import { createRandomIp } from "../utils/IPAddress";
 import { getRandomInt } from "../utils/helpers/getRandomInt";
 import { Reviver } from "../utils/JSONReviver";
@@ -17,7 +17,7 @@ import { BitNodeMultipliers } from "../BitNode/BitNodeMultipliers";
  *  Key (string) = IP
  *  Value = Server object
  */
-let AllServers: IMap<Server | HacknetServer> = {};
+let AllServers: Record<string, Server | HacknetServer> = {};
 
 function GetServerByIP(ip: string): BaseServer | undefined {
   for (const key of Object.keys(AllServers)) {
diff --git a/src/Settings/Settings.ts b/src/Settings/Settings.ts
index d477ba6e3..7846aad23 100644
--- a/src/Settings/Settings.ts
+++ b/src/Settings/Settings.ts
@@ -1,303 +1,98 @@
-import { ISelfInitializer, ISelfLoading } from "../types";
 import { OwnedAugmentationsOrderSetting, PurchaseAugmentationsOrderSetting } from "./SettingEnums";
-import { defaultTheme, ITheme } from "../Themes/Themes";
+import { defaultTheme } from "../Themes/Themes";
 import { defaultStyles } from "../Themes/Styles";
 import { WordWrapOptions } from "../ScriptEditor/ui/Options";
-import { OverviewSettings } from "../ui/React/Overview";
-import { IStyleSettings } from "../ScriptEditor/NetscriptDefinitions";
-import { defaultMonacoTheme, IScriptEditorTheme } from "../ScriptEditor/ui/themes";
+import { defaultMonacoTheme } from "../ScriptEditor/ui/themes";
 
-/**
- * Represents the default settings the player could customize.
- */
-interface IDefaultSettings {
-  /**
-   * How many servers per page
-   */
-  ActiveScriptsServerPageSize: number;
-  /**
-   * How many scripts per page
-   */
-  ActiveScriptsScriptPageSize: number;
-  /**
-   * How often the game should autosave the player's progress, in seconds.
-   */
-  AutosaveInterval: number;
-
-  /**
-   * How many milliseconds between execution points for Netscript 1 statements.
-   */
-  CodeInstructionRunTime: number;
-
-  /**
-   * Render city as list of buttons.
-   */
-  DisableASCIIArt: boolean;
-
-  /**
-   * Whether global keyboard shortcuts should be recognized throughout the game.
-   */
-  DisableHotkeys: boolean;
-
-  /**
-   * Whether text effects such as corruption should be visible.
-   */
-  DisableTextEffects: boolean;
-
-  /**
-   * Whether overview progress bars should be visible.
-   */
-  DisableOverviewProgressBars: boolean;
-
-  /**
-   * Enable bash hotkeys
-   */
-  EnableBashHotkeys: boolean;
-
-  /**
-   * Timestamps format
-   */
-  TimestampsFormat: string;
-
-  /**
-   * Locale used for display numbers
-   */
-  Locale: string;
-
-  /**
-   * Limit the number of recently killed script entries being tracked.
-   */
-  MaxRecentScriptsCapacity: number;
-
-  /**
-   * Limit the number of log entries for each script being executed on each server.
-   */
-  MaxLogCapacity: number;
-
-  /**
-   * Limit how many entries can be written to a Netscript Port before entries start to get pushed out.
-   */
-  MaxPortCapacity: number;
-
-  /**
-   * Limit the number of entries in the terminal.
-   */
-  MaxTerminalCapacity: number;
-
-  /**
-   * Port the Remote File API client will try to connect to.
-   */
-  RemoteFileApiPort: number;
-
-  /**
-   * Save the game when you save any file.
-   */
-  SaveGameOnFileSave: boolean;
-
-  /**
-   * Whether the player should be asked to confirm purchasing each and every augmentation.
-   */
-  SuppressBuyAugmentationConfirmation: boolean;
-
-  /**
-   * Whether the user should be prompted to join each faction via a dialog box.
-   */
-  SuppressFactionInvites: boolean;
-
-  /**
-   * Whether the user should be shown a dialog box whenever they receive a new message file.
-   */
-  SuppressMessages: boolean;
-
-  /**
-   * Whether the user should be asked to confirm travelling between cities.
-   */
-  SuppressTravelConfirmation: boolean;
-
-  /**
-   * Whether the user should be displayed a popup message when his Bladeburner actions are cancelled.
-   */
-  SuppressBladeburnerPopup: boolean;
-
-  /**
-   * Whether the user should be displayed a popup message on stock market actions.
-   */
-  SuppressTIXPopup: boolean;
-
-  /**
-   * Whether the user should be displayed a toast alert when the game is saved.
-   */
-  SuppressSavedGameToast: boolean;
-
-  /**
-   * Whether the user should be displayed a toast warning when the autosave is disabled.
-   */
-  SuppressAutosaveDisabledWarnings: boolean;
-
-  /*
-   * Whether the game should skip saving the running scripts for late game
-   */
-  ExcludeRunningScriptsFromSave: boolean;
-
-  /*
-   * Theme colors
-   */
-  theme: ITheme;
-
-  /*
-   * Interface styles
-   */
-  styles: IStyleSettings;
-
-  /*
-   * Use GiB instead of GB
-   */
-  UseIEC60027_2: boolean;
-
-  /*
-   * Display intermediary time unit when their value is null
-   */
-  ShowMiddleNullTimeUnit: boolean;
-
-  /*
-   * Character overview settings
-   */
-  overview: OverviewSettings;
-
-  /**
-   *  If the game's sidebar is opened
-   */
-  IsSidebarOpened: boolean;
-
-  /**
-   *  Script editor theme data
-   */
-  EditorTheme: IScriptEditorTheme;
-}
-
-/**
- * Represents all possible settings the player wants to customize to their play style.
- */
-interface ISettings extends IDefaultSettings {
-  /**
-   * What order the player's owned Augmentations/Source Files should be displayed in
-   */
-  OwnedAugmentationsOrder: OwnedAugmentationsOrderSetting;
-
-  /**
-   * What order the Augmentations should be displayed in when purchasing from a Faction
-   */
-  PurchaseAugmentationsOrder: PurchaseAugmentationsOrderSetting;
-
-  MonacoTheme: string;
-
-  MonacoInsertSpaces: boolean;
-
-  MonacoFontSize: number;
-
-  MonacoVim: boolean;
-
-  MonacoWordWrap: WordWrapOptions;
-}
-
-export const defaultSettings: IDefaultSettings = {
+/** The current options the player has customized to their play style. */
+export const Settings = {
+  /** How many servers per page */
   ActiveScriptsServerPageSize: 10,
+  /** How many scripts per page */
   ActiveScriptsScriptPageSize: 10,
+  /** How often the game should autosave the player's progress, in seconds. */
   AutosaveInterval: 60,
-  CodeInstructionRunTime: 50,
-  DisableASCIIArt: false,
-  DisableHotkeys: false,
-  DisableTextEffects: false,
-  DisableOverviewProgressBars: false,
-  EnableBashHotkeys: false,
-  TimestampsFormat: "",
-  Locale: "en",
-  MaxRecentScriptsCapacity: 50,
-  MaxLogCapacity: 50,
-  MaxPortCapacity: 50,
-  MaxTerminalCapacity: 500,
-  RemoteFileApiPort: 0,
-  SaveGameOnFileSave: true,
-  SuppressBuyAugmentationConfirmation: false,
-  SuppressFactionInvites: false,
-  SuppressMessages: false,
-  SuppressTravelConfirmation: false,
-  SuppressBladeburnerPopup: false,
-  SuppressTIXPopup: false,
-  SuppressSavedGameToast: false,
-  SuppressAutosaveDisabledWarnings: false,
-  UseIEC60027_2: false,
-  ShowMiddleNullTimeUnit: false,
-  ExcludeRunningScriptsFromSave: false,
-  IsSidebarOpened: true,
-
-  theme: defaultTheme,
-  styles: defaultStyles,
-  overview: { x: 0, y: 0, opened: true },
-
-  EditorTheme: defaultMonacoTheme,
-};
-
-/**
- * The current options the player has customized to their play style.
- */
-// tslint:disable-next-line:variable-name
-export const Settings: ISettings & ISelfInitializer & ISelfLoading = {
-  ActiveScriptsServerPageSize: defaultSettings.ActiveScriptsServerPageSize,
-  ActiveScriptsScriptPageSize: defaultSettings.ActiveScriptsScriptPageSize,
-  AutosaveInterval: defaultSettings.AutosaveInterval,
+  /** How many milliseconds between execution points for Netscript 1 statements. */
   CodeInstructionRunTime: 25,
-  DisableASCIIArt: defaultSettings.DisableASCIIArt,
-  DisableHotkeys: defaultSettings.DisableHotkeys,
-  DisableTextEffects: defaultSettings.DisableTextEffects,
-  DisableOverviewProgressBars: defaultSettings.DisableOverviewProgressBars,
-  EnableBashHotkeys: defaultSettings.EnableBashHotkeys,
-  TimestampsFormat: defaultSettings.TimestampsFormat,
+  /** Whether to render city as list of buttons. */
+  DisableASCIIArt: false,
+  /** Whether global keyboard shortcuts should be disabled throughout the game. */
+  DisableHotkeys: false,
+  /** Whether text effects such as corruption should be disabled. */
+  DisableTextEffects: false,
+  /** Whether overview progress bars should be visible. */
+  DisableOverviewProgressBars: false,
+  /** Whether to enable bash hotkeys */
+  EnableBashHotkeys: false,
+  /** Timestamps format string */
+  TimestampsFormat: "",
+  /** Locale used for display numbers. */
   Locale: "en",
-  MaxRecentScriptsCapacity: defaultSettings.MaxRecentScriptsCapacity,
-  MaxLogCapacity: defaultSettings.MaxLogCapacity,
-  MaxPortCapacity: defaultSettings.MaxPortCapacity,
-  MaxTerminalCapacity: defaultSettings.MaxTerminalCapacity,
+  /** Limit the number of recently killed script entries being tracked. */
+  MaxRecentScriptsCapacity: 50,
+  /** Limit the number of log entries for each script being executed on each server. */
+  MaxLogCapacity: 50,
+  /** Limit how many entries can be written to a Netscript Port before entries start to get pushed out. */
+  MaxPortCapacity: 50,
+  /** Limit the number of entries in the terminal. */
+  MaxTerminalCapacity: 500,
+  /** Port the Remote File API client will try to connect to. 0 to disable. */
+  RemoteFileApiPort: 0,
+  /** Whether to save the game when the player saves any file. */
+  SaveGameOnFileSave: true,
+  /** Whether to hide the confirmation dialog for augmentation purchases. */
+  SuppressBuyAugmentationConfirmation: false,
+  /** Whether to hide the dialog showing new faction invites. */
+  SuppressFactionInvites: false,
+  /** Whether to hide the dialog when the player receives a new message file. */
+  SuppressMessages: false,
+  /** Whether to hide the confirmation dialog when the player attempts to travel between cities. */
+  SuppressTravelConfirmation: false,
+  /** Whether to hide the dialog when the player's Bladeburner actions are cancelled. */
+  SuppressBladeburnerPopup: false,
+  /** Whether to hide dialogs for stock market actions. */
+  SuppressTIXPopup: false,
+  /** Whether to hide the toast alert when the game is saved. */
+  SuppressSavedGameToast: false,
+  /** Whether to hide the toast warning when the autosave is disabled. */
+  SuppressAutosaveDisabledWarnings: false,
+  /** Whether to GiB instead of GB. */
+  UseIEC60027_2: false,
+  /** Whether to display intermediary time unit when their value is null */
+  ShowMiddleNullTimeUnit: false,
+  /** Whether the game should skip saving the running scripts to the save file. */
+  ExcludeRunningScriptsFromSave: false,
+  /**  Whether the game's sidebar is opened. */
+  IsSidebarOpened: true,
+  /** Theme colors. */
+  theme: {...defaultTheme},
+  /** Interface styles. */
+  styles: {...defaultStyles},
+  /** Character overview settings. */
+  overview: { x: 0, y: 0, opened: true },
+  /**  Script editor theme data. */
+  EditorTheme: {...defaultMonacoTheme},
+  /** Order to display the player's owned Augmentations/Source Files. */
   OwnedAugmentationsOrder: OwnedAugmentationsOrderSetting.AcquirementTime,
+  /** What order the Augmentations should be displayed in when purchasing from a Faction. */
   PurchaseAugmentationsOrder: PurchaseAugmentationsOrderSetting.Default,
-  RemoteFileApiPort: defaultSettings.RemoteFileApiPort,
-  SaveGameOnFileSave: defaultSettings.SaveGameOnFileSave,
-  SuppressBuyAugmentationConfirmation: defaultSettings.SuppressBuyAugmentationConfirmation,
-  SuppressFactionInvites: defaultSettings.SuppressFactionInvites,
-  SuppressMessages: defaultSettings.SuppressMessages,
-  SuppressTravelConfirmation: defaultSettings.SuppressTravelConfirmation,
-  SuppressBladeburnerPopup: defaultSettings.SuppressBladeburnerPopup,
-  SuppressTIXPopup: defaultSettings.SuppressTIXPopup,
-  SuppressSavedGameToast: defaultSettings.SuppressSavedGameToast,
-  SuppressAutosaveDisabledWarnings: defaultSettings.SuppressAutosaveDisabledWarnings,
-  UseIEC60027_2: defaultSettings.UseIEC60027_2,
-  ShowMiddleNullTimeUnit: defaultSettings.ShowMiddleNullTimeUnit,
-  ExcludeRunningScriptsFromSave: defaultSettings.ExcludeRunningScriptsFromSave,
-  IsSidebarOpened: defaultSettings.IsSidebarOpened,
-
+  /** Script editor theme. */
   MonacoTheme: "monokai",
   MonacoInsertSpaces: false,
+  /** Text size for script editor. */
   MonacoFontSize: 20,
+  /** Whether to use Vim mod by default in the script editor */
   MonacoVim: false,
-  MonacoWordWrap: "off",
-
-  theme: { ...defaultTheme },
-  styles: { ...defaultStyles },
-  overview: defaultSettings.overview,
-  EditorTheme: { ...defaultMonacoTheme },
-  init() {
-    Object.assign(Settings, defaultSettings);
-  },
+  /** Word wrap setting for Script Editor. */
+  MonacoWordWrap: "off" as WordWrapOptions,
+  
   load(saveString: string) {
     const save = JSON.parse(saveString);
-    Object.assign(Settings.theme, save.theme);
-    delete save.theme;
-    Object.assign(Settings.styles, save.styles);
-    delete save.styles;
-    Object.assign(Settings.overview, save.overview);
-    delete save.overview;
-    Object.assign(Settings.EditorTheme, save.EditorTheme);
-    delete save.EditorTheme;
+    save.theme && Object.assign(Settings.theme, save.theme);
+    save.styles && Object.assign(Settings.styles, save.styles);
+    save.overview && Object.assign(Settings.overview, save.overview);
+    save.EditorTheme && Object.assign(Settings.EditorTheme, save.EditorTheme);
+    delete save.theme, save.styles, save.overview, save.EditorTheme;
     Object.assign(Settings, save);
   },
 };
diff --git a/src/SourceFile/SourceFiles.tsx b/src/SourceFile/SourceFiles.tsx
index 8d8f23818..086a58abd 100644
--- a/src/SourceFile/SourceFiles.tsx
+++ b/src/SourceFile/SourceFiles.tsx
@@ -1,9 +1,8 @@
 import React from "react";
 import { SourceFile } from "./SourceFile";
-import { IMap } from "../types";
 import { initBitNodes, initBitNodeMultipliers } from "../BitNode/BitNode";
 
-export const SourceFiles: IMap<SourceFile> = {};
+export const SourceFiles: Record<string, SourceFile> = {};
 /** Engine initializer for SourceFiles, BitNodes, and BitNodeMultipliers. Run once at engine load. */
 export function initSourceFiles() {
   initBitNodes();
diff --git a/src/StockMarket/OrderProcessing.tsx b/src/StockMarket/OrderProcessing.tsx
index 7c5ba6bcb..51d14a0bd 100644
--- a/src/StockMarket/OrderProcessing.tsx
+++ b/src/StockMarket/OrderProcessing.tsx
@@ -11,8 +11,6 @@ import { Stock } from "./Stock";
 import { OrderTypes } from "./data/OrderTypes";
 import { PositionTypes } from "./data/PositionTypes";
 
-import { IMap } from "../types";
-
 import { numeralWrapper } from "../ui/numeralFormat";
 import { Money } from "../ui/React/Money";
 
@@ -23,7 +21,7 @@ import * as React from "react";
 
 export interface IProcessOrderRefs {
   stockMarket: IStockMarket;
-  symbolToStockMap: IMap<Stock>;
+  symbolToStockMap: Record<string, Stock>;
 }
 
 /**
diff --git a/src/StockMarket/StockMarket.tsx b/src/StockMarket/StockMarket.tsx
index ae80b9a0d..dabc29afd 100644
--- a/src/StockMarket/StockMarket.tsx
+++ b/src/StockMarket/StockMarket.tsx
@@ -10,8 +10,6 @@ import { PositionTypes } from "./data/PositionTypes";
 import { StockSymbols } from "./data/StockSymbols";
 
 import { CONSTANTS } from "../Constants";
-import { IMap } from "../types";
-
 import { numeralWrapper } from "../ui/numeralFormat";
 
 import { dialogBoxCreate } from "../ui/React/DialogBox";
@@ -25,7 +23,7 @@ export let StockMarket: IStockMarket = {
   storedCycles: 0,
   ticksUntilCycle: 0,
 } as IStockMarket; // Maps full stock name -> Stock object
-export const SymbolToStockMap: IMap<Stock> = {}; // Maps symbol -> Stock object
+export const SymbolToStockMap: Record<string, Stock> = {}; // Maps symbol -> Stock object
 
 export function placeOrder(
   stock: Stock,
@@ -172,7 +170,7 @@ export function initStockMarket(): void {
 }
 
 export function initSymbolToStockMap(): void {
-  for (const name of Object.keys(StockSymbols)) {
+  for (const name of Object.keys(StockSymbols) as Array<keyof typeof StockSymbols>) {
     if (StockSymbols.hasOwnProperty(name)) {
       const stock = StockMarket[name];
       if (stock == null) {
diff --git a/src/StockMarket/data/StockSymbols.ts b/src/StockMarket/data/StockSymbols.ts
index 707f47ca6..d41ddcf69 100644
--- a/src/StockMarket/data/StockSymbols.ts
+++ b/src/StockMarket/data/StockSymbols.ts
@@ -1,41 +1,40 @@
-import { IMap } from "../../types";
 import { LocationName } from "../../Locations/data/LocationNames";
 
-export const StockSymbols: IMap<string> = {};
+export const StockSymbols = {
+  // Stocks for companies at which you can work
+  [LocationName.AevumECorp]: "ECP",
+  [LocationName.Sector12MegaCorp]: "MGCP",
+  [LocationName.Sector12BladeIndustries]: "BLD",
+  [LocationName.AevumClarkeIncorporated]: "CLRK",
+  [LocationName.VolhavenOmniTekIncorporated]: "OMTK",
+  [LocationName.Sector12FourSigma]: "FSIG",
+  [LocationName.ChongqingKuaiGongInternational]: "KGI",
+  [LocationName.AevumFulcrumTechnologies]: "FLCM",
+  [LocationName.IshimaStormTechnologies]: "STM",
+  [LocationName.NewTokyoDefComm]: "DCOMM",
+  [LocationName.VolhavenHeliosLabs]: "HLS",
+  [LocationName.NewTokyoVitaLife]: "VITA",
+  [LocationName.Sector12IcarusMicrosystems]: "ICRS",
+  [LocationName.Sector12UniversalEnergy]: "UNV",
+  [LocationName.AevumAeroCorp]: "AERO",
+  [LocationName.VolhavenOmniaCybersystems]: "OMN",
+  [LocationName.ChongqingSolarisSpaceSystems]: "SLRS",
+  [LocationName.NewTokyoGlobalPharmaceuticals]: "GPH",
+  [LocationName.IshimaNovaMedical]: "NVMD",
+  [LocationName.AevumWatchdogSecurity]: "WDS",
+  [LocationName.VolhavenLexoCorp]: "LXO",
+  [LocationName.AevumRhoConstruction]: "RHOC",
+  [LocationName.Sector12AlphaEnterprises]: "APHE",
+  [LocationName.VolhavenSysCoreSecurities]: "SYSC",
+  [LocationName.VolhavenCompuTek]: "CTK",
+  [LocationName.AevumNetLinkTechnologies]: "NTLK",
+  [LocationName.IshimaOmegaSoftware]: "OMGA",
+  [LocationName.Sector12FoodNStuff]: "FNS",
+  [LocationName.Sector12JoesGuns]: "JGN",
 
-// Stocks for companies at which you can work
-StockSymbols[LocationName.AevumECorp] = "ECP";
-StockSymbols[LocationName.Sector12MegaCorp] = "MGCP";
-StockSymbols[LocationName.Sector12BladeIndustries] = "BLD";
-StockSymbols[LocationName.AevumClarkeIncorporated] = "CLRK";
-StockSymbols[LocationName.VolhavenOmniTekIncorporated] = "OMTK";
-StockSymbols[LocationName.Sector12FourSigma] = "FSIG";
-StockSymbols[LocationName.ChongqingKuaiGongInternational] = "KGI";
-StockSymbols[LocationName.AevumFulcrumTechnologies] = "FLCM";
-StockSymbols[LocationName.IshimaStormTechnologies] = "STM";
-StockSymbols[LocationName.NewTokyoDefComm] = "DCOMM";
-StockSymbols[LocationName.VolhavenHeliosLabs] = "HLS";
-StockSymbols[LocationName.NewTokyoVitaLife] = "VITA";
-StockSymbols[LocationName.Sector12IcarusMicrosystems] = "ICRS";
-StockSymbols[LocationName.Sector12UniversalEnergy] = "UNV";
-StockSymbols[LocationName.AevumAeroCorp] = "AERO";
-StockSymbols[LocationName.VolhavenOmniaCybersystems] = "OMN";
-StockSymbols[LocationName.ChongqingSolarisSpaceSystems] = "SLRS";
-StockSymbols[LocationName.NewTokyoGlobalPharmaceuticals] = "GPH";
-StockSymbols[LocationName.IshimaNovaMedical] = "NVMD";
-StockSymbols[LocationName.AevumWatchdogSecurity] = "WDS";
-StockSymbols[LocationName.VolhavenLexoCorp] = "LXO";
-StockSymbols[LocationName.AevumRhoConstruction] = "RHOC";
-StockSymbols[LocationName.Sector12AlphaEnterprises] = "APHE";
-StockSymbols[LocationName.VolhavenSysCoreSecurities] = "SYSC";
-StockSymbols[LocationName.VolhavenCompuTek] = "CTK";
-StockSymbols[LocationName.AevumNetLinkTechnologies] = "NTLK";
-StockSymbols[LocationName.IshimaOmegaSoftware] = "OMGA";
-StockSymbols[LocationName.Sector12FoodNStuff] = "FNS";
-StockSymbols[LocationName.Sector12JoesGuns] = "JGN";
-
-// Stocks for other companies
-StockSymbols["Sigma Cosmetics"] = "SGC";
-StockSymbols["Catalyst Ventures"] = "CTYS";
-StockSymbols["Microdyne Technologies"] = "MDYN";
-StockSymbols["Titan Laboratories"] = "TITN";
+  // Stocks for other companies
+  ["Sigma Cosmetics"]: "SGC",
+  ["Catalyst Ventures"]: "CTYS",
+  ["Microdyne Technologies"]: "MDYN",
+  ["Titan Laboratories"]: "TITN",
+} as const;
diff --git a/src/StockMarket/data/TickerHeaderFormatData.ts b/src/StockMarket/data/TickerHeaderFormatData.ts
index 42664268b..1ad7e8f49 100644
--- a/src/StockMarket/data/TickerHeaderFormatData.ts
+++ b/src/StockMarket/data/TickerHeaderFormatData.ts
@@ -5,7 +5,7 @@ export const TickerHeaderFormatData = {
   longestSymbol: 0,
 };
 
-for (const key of Object.keys(StockSymbols)) {
+for (const key of Object.keys(StockSymbols) as Array<keyof typeof StockSymbols>) {
   TickerHeaderFormatData.longestName = Math.max(key.length, TickerHeaderFormatData.longestName);
   TickerHeaderFormatData.longestSymbol = Math.max(StockSymbols[key].length, TickerHeaderFormatData.longestSymbol);
 }
diff --git a/src/Terminal/HelpText.ts b/src/Terminal/HelpText.ts
index f9c85a92b..f1fff1696 100644
--- a/src/Terminal/HelpText.ts
+++ b/src/Terminal/HelpText.ts
@@ -1,5 +1,4 @@
 /* tslint:disable:max-line-length completed-docs variable-name*/
-import { IMap } from "../types";
 
 export const TerminalHelpText: string[] = [
   "Type 'help name' to learn more about the command ",
@@ -47,7 +46,7 @@ export const TerminalHelpText: string[] = [
   " ",
 ];
 
-const TemplatedHelpTexts: IMap<(command: string) => string[]> = {
+const TemplatedHelpTexts: Record<string, (command: string) => string[]> = {
   scriptEditor: (command) => {
     return [
       `Usage: ${command} [file ...] | [glob]`,
@@ -70,7 +69,7 @@ const TemplatedHelpTexts: IMap<(command: string) => string[]> = {
   },
 };
 
-export const HelpTexts: IMap<string[]> = {
+export const HelpTexts: Record<string, string[]> = {
   alias: [
     'Usage: alias [-g] [name="value"] ',
     " ",
diff --git a/src/Terminal/commands/cat.ts b/src/Terminal/commands/cat.ts
index 0807e8a84..b8fcc9dd0 100644
--- a/src/Terminal/commands/cat.ts
+++ b/src/Terminal/commands/cat.ts
@@ -3,7 +3,7 @@ import { BaseServer } from "../../Server/BaseServer";
 import { MessageFilenames, showMessage } from "../../Message/MessageHelpers";
 import { showLiterature } from "../../Literature/LiteratureHelpers";
 import { dialogBoxCreate } from "../../ui/React/DialogBox";
-import { checkEnum } from "../../utils/helpers/checkEnum";
+import { checkObjContainsValue } from "../../utils/helpers/checkObjContains";
 
 export function cat(args: (string | number | boolean)[], server: BaseServer): void {
   if (args.length !== 1) {
@@ -35,7 +35,7 @@ export function cat(args: (string | number | boolean)[], server: BaseServer): vo
       } else if (filename.endsWith(".msg")) {
         const file = server.messages[i];
         if (file !== filename) continue;
-        if (!checkEnum(MessageFilenames, file)) return;
+        if (!checkObjContainsValue(MessageFilenames, file)) return;
         showMessage(file);
         return;
       }
diff --git a/src/Themes/Themes.ts b/src/Themes/Themes.ts
index 847c6fb3e..d5ec62f41 100644
--- a/src/Themes/Themes.ts
+++ b/src/Themes/Themes.ts
@@ -1,4 +1,3 @@
-import { IMap } from "../types";
 import * as predefined from "./data";
 
 export interface ITheme {
@@ -51,6 +50,6 @@ export const defaultTheme: ITheme = {
   ...predefined.Default.colors,
 };
 
-export const getPredefinedThemes = (): IMap<IPredefinedTheme> => ({
+export const getPredefinedThemes = (): Record<string, IPredefinedTheme> => ({
   ...predefined,
 });
diff --git a/src/Themes/ui/ThemeBrowser.tsx b/src/Themes/ui/ThemeBrowser.tsx
index e8cee63c7..d7d9275bb 100644
--- a/src/Themes/ui/ThemeBrowser.tsx
+++ b/src/Themes/ui/ThemeBrowser.tsx
@@ -10,7 +10,7 @@ import { StyleEditorButton } from "./StyleEditorButton";
 import { ThemeEntry } from "./ThemeEntry";
 import { ThemeCollaborate } from "./ThemeCollaborate";
 import { Modal } from "../../ui/React/Modal";
-import { SnackbarEvents, ToastVariant } from "../../ui/React/Snackbar";
+import { SnackbarEvents } from "../../ui/React/Snackbar";
 
 // Everything dies when the theme gets reloaded, so we'll keep the current scroll to not jump around.
 let previousScrollY = 0;
@@ -49,7 +49,7 @@ export function ThemeBrowser(): React.ReactElement {
           UNDO
         </Button>
       </>,
-      ToastVariant.INFO,
+      "info",
       30000,
     );
   }
diff --git a/src/Themes/ui/ThemeEditorModal.tsx b/src/Themes/ui/ThemeEditorModal.tsx
index f8fd3d823..e70db847a 100644
--- a/src/Themes/ui/ThemeEditorModal.tsx
+++ b/src/Themes/ui/ThemeEditorModal.tsx
@@ -12,7 +12,7 @@ import PaletteSharpIcon from "@mui/icons-material/PaletteSharp";
 import HistoryIcon from "@mui/icons-material/History";
 import { Color, ColorPicker } from "material-ui-color";
 import { ThemeEvents } from "./Theme";
-import { Settings, defaultSettings } from "../../Settings/Settings";
+import { Settings } from "../../Settings/Settings";
 import { defaultTheme } from "../Themes";
 import { UserInterfaceTheme } from "../../ScriptEditor/NetscriptDefinitions";
 import { Router } from "../../ui/GameRoot";
@@ -150,19 +150,19 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="primarylight"
           onColorChange={onColorChange}
           color={customTheme["primarylight"]}
-          defaultColor={defaultSettings.theme["primarylight"]}
+          defaultColor={defaultTheme["primarylight"]}
         />
         <ColorEditor
           name="primary"
           onColorChange={onColorChange}
           color={customTheme["primary"]}
-          defaultColor={defaultSettings.theme["primary"]}
+          defaultColor={defaultTheme["primary"]}
         />
         <ColorEditor
           name="primarydark"
           onColorChange={onColorChange}
           color={customTheme["primarydark"]}
-          defaultColor={defaultSettings.theme["primarydark"]}
+          defaultColor={defaultTheme["primarydark"]}
         />
 
         <br />
@@ -170,19 +170,19 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="successlight"
           onColorChange={onColorChange}
           color={customTheme["successlight"]}
-          defaultColor={defaultSettings.theme["successlight"]}
+          defaultColor={defaultTheme["successlight"]}
         />
         <ColorEditor
           name="success"
           onColorChange={onColorChange}
           color={customTheme["success"]}
-          defaultColor={defaultSettings.theme["success"]}
+          defaultColor={defaultTheme["success"]}
         />
         <ColorEditor
           name="successdark"
           onColorChange={onColorChange}
           color={customTheme["successdark"]}
-          defaultColor={defaultSettings.theme["successdark"]}
+          defaultColor={defaultTheme["successdark"]}
         />
 
         <br />
@@ -190,19 +190,19 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="errorlight"
           onColorChange={onColorChange}
           color={customTheme["errorlight"]}
-          defaultColor={defaultSettings.theme["errorlight"]}
+          defaultColor={defaultTheme["errorlight"]}
         />
         <ColorEditor
           name="error"
           onColorChange={onColorChange}
           color={customTheme["error"]}
-          defaultColor={defaultSettings.theme["error"]}
+          defaultColor={defaultTheme["error"]}
         />
         <ColorEditor
           name="errordark"
           onColorChange={onColorChange}
           color={customTheme["errordark"]}
-          defaultColor={defaultSettings.theme["errordark"]}
+          defaultColor={defaultTheme["errordark"]}
         />
 
         <br />
@@ -210,19 +210,19 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="secondarylight"
           onColorChange={onColorChange}
           color={customTheme["secondarylight"]}
-          defaultColor={defaultSettings.theme["secondarylight"]}
+          defaultColor={defaultTheme["secondarylight"]}
         />
         <ColorEditor
           name="secondary"
           onColorChange={onColorChange}
           color={customTheme["secondary"]}
-          defaultColor={defaultSettings.theme["secondary"]}
+          defaultColor={defaultTheme["secondary"]}
         />
         <ColorEditor
           name="secondarydark"
           onColorChange={onColorChange}
           color={customTheme["secondarydark"]}
-          defaultColor={defaultSettings.theme["secondarydark"]}
+          defaultColor={defaultTheme["secondarydark"]}
         />
 
         <br />
@@ -230,19 +230,19 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="warninglight"
           onColorChange={onColorChange}
           color={customTheme["warninglight"]}
-          defaultColor={defaultSettings.theme["warninglight"]}
+          defaultColor={defaultTheme["warninglight"]}
         />
         <ColorEditor
           name="warning"
           onColorChange={onColorChange}
           color={customTheme["warning"]}
-          defaultColor={defaultSettings.theme["warning"]}
+          defaultColor={defaultTheme["warning"]}
         />
         <ColorEditor
           name="warningdark"
           onColorChange={onColorChange}
           color={customTheme["warningdark"]}
-          defaultColor={defaultSettings.theme["warningdark"]}
+          defaultColor={defaultTheme["warningdark"]}
         />
 
         <br />
@@ -250,19 +250,19 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="infolight"
           onColorChange={onColorChange}
           color={customTheme["infolight"]}
-          defaultColor={defaultSettings.theme["infolight"]}
+          defaultColor={defaultTheme["infolight"]}
         />
         <ColorEditor
           name="info"
           onColorChange={onColorChange}
           color={customTheme["info"]}
-          defaultColor={defaultSettings.theme["info"]}
+          defaultColor={defaultTheme["info"]}
         />
         <ColorEditor
           name="infodark"
           onColorChange={onColorChange}
           color={customTheme["infodark"]}
-          defaultColor={defaultSettings.theme["infodark"]}
+          defaultColor={defaultTheme["infodark"]}
         />
 
         <br />
@@ -270,43 +270,43 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="welllight"
           onColorChange={onColorChange}
           color={customTheme["welllight"]}
-          defaultColor={defaultSettings.theme["welllight"]}
+          defaultColor={defaultTheme["welllight"]}
         />
         <ColorEditor
           name="well"
           onColorChange={onColorChange}
           color={customTheme["well"]}
-          defaultColor={defaultSettings.theme["well"]}
+          defaultColor={defaultTheme["well"]}
         />
         <ColorEditor
           name="white"
           onColorChange={onColorChange}
           color={customTheme["white"]}
-          defaultColor={defaultSettings.theme["white"]}
+          defaultColor={defaultTheme["white"]}
         />
         <ColorEditor
           name="black"
           onColorChange={onColorChange}
           color={customTheme["black"]}
-          defaultColor={defaultSettings.theme["black"]}
+          defaultColor={defaultTheme["black"]}
         />
         <ColorEditor
           name="backgroundprimary"
           onColorChange={onColorChange}
           color={customTheme["backgroundprimary"]}
-          defaultColor={defaultSettings.theme["backgroundprimary"]}
+          defaultColor={defaultTheme["backgroundprimary"]}
         />
         <ColorEditor
           name="backgroundsecondary"
           onColorChange={onColorChange}
           color={customTheme["backgroundsecondary"]}
-          defaultColor={defaultSettings.theme["backgroundsecondary"]}
+          defaultColor={defaultTheme["backgroundsecondary"]}
         />
         <ColorEditor
           name="button"
           onColorChange={onColorChange}
           color={customTheme["button"]}
-          defaultColor={defaultSettings.theme["button"]}
+          defaultColor={defaultTheme["button"]}
         />
 
         <br />
@@ -314,49 +314,49 @@ export function ThemeEditorModal(props: IProps): React.ReactElement {
           name="hp"
           onColorChange={onColorChange}
           color={customTheme["hp"]}
-          defaultColor={defaultSettings.theme["hp"]}
+          defaultColor={defaultTheme["hp"]}
         />
         <ColorEditor
           name="money"
           onColorChange={onColorChange}
           color={customTheme["money"]}
-          defaultColor={defaultSettings.theme["money"]}
+          defaultColor={defaultTheme["money"]}
         />
         <ColorEditor
           name="hack"
           onColorChange={onColorChange}
           color={customTheme["hack"]}
-          defaultColor={defaultSettings.theme["hack"]}
+          defaultColor={defaultTheme["hack"]}
         />
         <ColorEditor
           name="combat"
           onColorChange={onColorChange}
           color={customTheme["combat"]}
-          defaultColor={defaultSettings.theme["combat"]}
+          defaultColor={defaultTheme["combat"]}
         />
         <ColorEditor
           name="cha"
           onColorChange={onColorChange}
           color={customTheme["cha"]}
-          defaultColor={defaultSettings.theme["cha"]}
+          defaultColor={defaultTheme["cha"]}
         />
         <ColorEditor
           name="int"
           onColorChange={onColorChange}
           color={customTheme["int"]}
-          defaultColor={defaultSettings.theme["int"]}
+          defaultColor={defaultTheme["int"]}
         />
         <ColorEditor
           name="rep"
           onColorChange={onColorChange}
           color={customTheme["rep"]}
-          defaultColor={defaultSettings.theme["rep"]}
+          defaultColor={defaultTheme["rep"]}
         />
         <ColorEditor
           name="disabled"
           onColorChange={onColorChange}
           color={customTheme["disabled"]}
-          defaultColor={defaultSettings.theme["disabled"]}
+          defaultColor={defaultTheme["disabled"]}
         />
       </Paper>
 
diff --git a/src/engine.tsx b/src/engine.tsx
index 78f3d7bb5..81380c1a6 100644
--- a/src/engine.tsx
+++ b/src/engine.tsx
@@ -46,7 +46,7 @@ import { calculateAchievements } from "./Achievements/Achievements";
 import React from "react";
 import { setupUncaughtPromiseHandler } from "./UncaughtPromiseHandler";
 import { Button, Typography } from "@mui/material";
-import { SnackbarEvents, ToastVariant } from "./ui/React/Snackbar";
+import { SnackbarEvents } from "./ui/React/Snackbar";
 
 const Engine: {
   _lastUpdate: number;
@@ -431,7 +431,7 @@ function warnAutosaveDisabled(): void {
       </Button>
     </>
   );
-  SnackbarEvents.emit(warningToast, ToastVariant.WARNING, 5000);
+  SnackbarEvents.emit(warningToast, "warning", 5000);
 }
 
 export { Engine };
diff --git a/src/types.ts b/src/types.ts
index 86bcfdead..9a5388765 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -1,35 +1,8 @@
-/**
- * Performs an equality check between two instances of the same type.
- */
-export type EqualityFunc<T> = (a: T, b: T) => boolean;
+/** Construct a type using the values from an object. Requires object to be defined "as const" */
+export type ValuesFrom<T> = T[keyof T];
 
-/**
- * A map is an object that holds a mapping between string keys and some consistent type.
- */
-export interface IMap<T> {
-  [key: string]: T;
-}
-
-/**
- * Contains a method to initialize itself to a known state.
- */
-export interface ISelfInitializer {
-  /**
-   * Initialize/reset the object to a known, default state.
-   */
-  init(): void;
-}
-
-/**
- * Contains a method to repopulate itself based on a JSON string.
- */
-export interface ISelfLoading {
-  /**
-   * Loads the save state onto the current object.
-   * @param saveState JSON string representing the save state.
-   */
-  load(saveState: string): void;
-}
+/** Only allowed to be true if the types are equal. */
+export type TypeEquality<T1, T2> = [T1] extends [T2] ? ([T2] extends [T1] ? true : false) : false;
 
 /**
  * Status object for functions that return a boolean indicating success/failure
diff --git a/src/ui/React/Snackbar.tsx b/src/ui/React/Snackbar.tsx
index 1f3087a5a..c851129bb 100644
--- a/src/ui/React/Snackbar.tsx
+++ b/src/ui/React/Snackbar.tsx
@@ -2,7 +2,7 @@ import React, { useEffect } from "react";
 import { useSnackbar, SnackbarProvider as SB } from "notistack";
 import makeStyles from "@mui/styles/makeStyles";
 import { EventEmitter } from "../../utils/EventEmitter";
-import Alert from "@mui/material/Alert";
+import Alert, { AlertColor } from "@mui/material/Alert";
 import Paper from "@mui/material/Paper";
 import { logBoxBaseZIndex } from "./LogBoxManager";
 
@@ -10,12 +10,7 @@ interface IProps {
   children: React.ReactNode | React.ReactNode[];
 }
 
-export enum ToastVariant {
-  SUCCESS = "success",
-  WARNING = "warning",
-  ERROR = "error",
-  INFO = "info",
-}
+export type ToastVariant = AlertColor;
 
 const useStyles = makeStyles(() => ({
   snackbar: {
diff --git a/src/utils/StringHelperFunctions.ts b/src/utils/StringHelperFunctions.ts
index eecf5db15..94133e3aa 100644
--- a/src/utils/StringHelperFunctions.ts
+++ b/src/utils/StringHelperFunctions.ts
@@ -1,5 +1,4 @@
 import { Settings } from "../Settings/Settings";
-import { EqualityFunc } from "../types";
 import { isString } from "./helpers/isString";
 
 /*
@@ -65,7 +64,7 @@ function longestCommonStart(strings: string[]): string {
   const a2: string = A[A.length - 1];
   const L: number = a1.length;
   let i = 0;
-  const areEqualCaseInsensitive: EqualityFunc<string> = (a: string, b: string) => a.toUpperCase() === b.toUpperCase();
+  const areEqualCaseInsensitive = (a: string, b: string) => a.toUpperCase() === b.toUpperCase();
   while (i < L && areEqualCaseInsensitive(a1.charAt(i), a2.charAt(i))) {
     i++;
   }
diff --git a/src/utils/helpers/checkEnum.ts b/src/utils/helpers/checkEnum.ts
deleted file mode 100644
index db61323fe..000000000
--- a/src/utils/helpers/checkEnum.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-export function checkEnum<T extends string, TEnumValue extends string>(
-  enumVariable: { [key in T]: TEnumValue },
-  value: string,
-): value is TEnumValue {
-  return Object.values(enumVariable).includes(value);
-}
diff --git a/src/utils/helpers/checkObjContains.ts b/src/utils/helpers/checkObjContains.ts
new file mode 100644
index 000000000..a0df51d7a
--- /dev/null
+++ b/src/utils/helpers/checkObjContains.ts
@@ -0,0 +1,7 @@
+// This works for both enums and regular objects.
+export function checkObjContainsValue<T extends Record<string, string>>(
+  obj: T,
+  value: string,
+): value is T[keyof T] {
+  return Object.values(obj).includes(value);
+}
diff --git a/test/jest/StockMarket.test.ts b/test/jest/StockMarket.test.ts
index 7b1e03df4..debd53885 100644
--- a/test/jest/StockMarket.test.ts
+++ b/test/jest/StockMarket.test.ts
@@ -1,6 +1,5 @@
 import { CONSTANTS } from "../../src/Constants";
 import { Player } from "../../src/Player";
-import { IMap } from "../../src/types";
 
 import { Company } from "../../src/Company/Company";
 import { Server } from "../../src/Server/Server";
@@ -457,7 +456,7 @@ describe("Stock Market Tests", function () {
 
       it("should trigger a price update when it has enough cycles", function () {
         // Get the initial prices
-        const initialValues: IMap<any> = {};
+        const initialValues: Record<string, any> = {};
         for (const stockName in StockMarket) {
           const stock = StockMarket[stockName];
           if (!(stock instanceof Stock)) {