diff --git a/src/main/level/index.ts b/src/main/level/index.ts
new file mode 100644
index 00000000..90a34be3
--- /dev/null
+++ b/src/main/level/index.ts
@@ -0,0 +1,3 @@
+export { db } from "./level";
+
+export * from "./sublevels";
diff --git a/src/main/level/level.ts b/src/main/level/level.ts
new file mode 100644
index 00000000..382c61a5
--- /dev/null
+++ b/src/main/level/level.ts
@@ -0,0 +1,4 @@
+import { levelDatabasePath } from "@main/constants";
+import { Level } from "level";
+
+export const db = new Level(levelDatabasePath, { valueEncoding: "json" });
diff --git a/src/main/level/sublevels/games.ts b/src/main/level/sublevels/games.ts
new file mode 100644
index 00000000..bc0cad30
--- /dev/null
+++ b/src/main/level/sublevels/games.ts
@@ -0,0 +1,7 @@
+import { Game } from "@types";
+import { db } from "../level";
+import { levelKeys } from "./keys";
+
+export const gamesSublevel = db.sublevel<string, Game>(levelKeys.games, {
+  valueEncoding: "json",
+});
diff --git a/src/main/level/sublevels/index.ts b/src/main/level/sublevels/index.ts
new file mode 100644
index 00000000..9d316e1a
--- /dev/null
+++ b/src/main/level/sublevels/index.ts
@@ -0,0 +1 @@
+export * from "./games";
diff --git a/src/main/level/sublevels/keys.ts b/src/main/level/sublevels/keys.ts
new file mode 100644
index 00000000..6bb54c4a
--- /dev/null
+++ b/src/main/level/sublevels/keys.ts
@@ -0,0 +1,8 @@
+import type { GameShop } from "@types";
+
+export const levelKeys = {
+  games: "games",
+  game: (shop: GameShop, objectId: string) => `${shop}:${objectId}`,
+  user: "user",
+  auth: "auth",
+};
diff --git a/src/main/services/crypto.ts b/src/main/services/crypto.ts
new file mode 100644
index 00000000..63a50668
--- /dev/null
+++ b/src/main/services/crypto.ts
@@ -0,0 +1,28 @@
+import { safeStorage } from "electron";
+import { logger } from "./logger";
+
+export class Crypto {
+  public static encrypt(str: string) {
+    if (safeStorage.isEncryptionAvailable()) {
+      return safeStorage.encryptString(str).toString("base64");
+    } else {
+      logger.warn(
+        "Encrypt method returned raw string because encryption is not available"
+      );
+
+      return str;
+    }
+  }
+
+  public static decrypt(b64: string) {
+    if (safeStorage.isEncryptionAvailable()) {
+      return safeStorage.decryptString(Buffer.from(b64, "base64"));
+    } else {
+      logger.warn(
+        "Decrypt method returned raw string because encryption is not available"
+      );
+
+      return b64;
+    }
+  }
+}
diff --git a/src/types/level.types.ts b/src/types/level.types.ts
new file mode 100644
index 00000000..490ab060
--- /dev/null
+++ b/src/types/level.types.ts
@@ -0,0 +1,23 @@
+export type SubscriptionStatus = "active" | "pending" | "cancelled";
+
+export interface Subscription {
+  id: string;
+  status: SubscriptionStatus;
+  plan: { id: string; name: string };
+  expiresAt: string | null;
+  paymentMethod: "pix" | "paypal";
+}
+
+export interface Auth {
+  accessToken: string;
+  refreshToken: string;
+  tokenExpirationTimestamp: number;
+}
+
+export interface User {
+  id: string;
+  displayName: string;
+  profileImageUrl: string | null;
+  backgroundImageUrl: string | null;
+  subscription: Subscription | null;
+}