4 files changed, 40 insertions, 0 deletions
diff --git a/backend/src/types/database.ts b/backend/src/types/database.ts
new file mode 100644
index 0000000..fff88a1
--- /dev/null
+++ b/backend/src/types/database.ts
@@ -0,0 +1,7 @@
+export interface PostgresError extends Error {
+    code: string;
+    detail?: string;
+    schema?: string;
+    table?: string;
+    constraint?: string;
+}
diff --git a/backend/src/types/express.d.ts b/backend/src/types/express.d.ts
new file mode 100644
index 0000000..7ac6ca0
--- /dev/null
+++ b/backend/src/types/express.d.ts
@@ -0,0 +1,11 @@
+import type { AuthorizedUser } from "./user.js";
+
+declare global {
+    namespace Express {
+        interface Request {
+            user?: AuthorizedUser;
+        }
+    }
+}
+
+export {};
diff --git a/backend/src/types/request.ts b/backend/src/types/request.ts
new file mode 100644
index 0000000..ef80738
--- /dev/null
+++ b/backend/src/types/request.ts
@@ -0,0 +1,4 @@
+export type LoginRequest = {
+    email: string;
+    password: string;
+};
diff --git a/backend/src/types/user.ts b/backend/src/types/user.ts
new file mode 100644
index 0000000..875072c
--- /dev/null
+++ b/backend/src/types/user.ts
@@ -0,0 +1,18 @@
+export type AdminCreationResult = {
+    id: string;
+    email: string;
+    created_at: Date;
+};
+
+export type AuthorizedUser = {
+    id: string;
+    email: string;
+    createdAt: Date;
+};
+
+export type DatabaseUser = {
+    id: string;
+    email: string;
+    password_hash: string;
+    created_at: Date;
+};