fix(ts): make expires serializable externally

src/server/routes/session.js

@@ -87,7 +87,7 @@ export default async function session(req, res) {
             image: user.image,
           },
           accessToken: session.accessToken,
-          expires: session.expires,
+          expires: session.expires.toISOString(),
         }
 
         // Pass Session through to the session callback

types/adapters.d.ts

@@ -6,6 +6,10 @@ export interface AdapterUser extends User {
   emailVerified?: Date | null
 }
 
+export interface AdapterSession extends Omit<Session, "expires"> {
+  expires: Date
+}
+
 /**
  * Using a custom adapter you can connect to any database backend or even several different databases.
  * Custom adapters created and maintained by our community can be found in the adapters repository.
@@ -70,9 +74,12 @@ export interface Adapter {
     providerId: string,
     providerAccountId: string
   ): Awaitable<void>
-  createSession(user: AdapterUser): Awaitable<Session>
-  getSession(sessionId: string): Awaitable<Session | null>
-  updateSession(session: Session, force?: boolean): Awaitable<Session | null>
+  createSession(user: AdapterUser): Awaitable<AdapterSession>
+  getSession(sessionId: string): Awaitable<AdapterSession | null>
+  updateSession(
+    session: AdapterSession,
+    force?: boolean
+  ): Awaitable<AdapterSession | null>
   deleteSession(sessionId: string): Awaitable<void>
   createVerificationRequest?(
     identifier: string,

types/index.d.ts

@@ -1,7 +1,3 @@
-// Minimum TypeScript Version: 3.6
-
-/// <reference types="node" />
-
 import { Adapter } from "./adapters"
 import { JWTOptions, JWT } from "./jwt"
 import { AppProviders, Credentials } from "./providers"
@@ -431,13 +427,15 @@ export interface PagesOptions {
   newUser: string
 }
 
+export type ISODateString = string
+
 export interface DefaultSession extends Record<string, unknown> {
   user?: {
     name?: string | null
     email?: string | null
     image?: string | null
   }
-  expires: Date
+  expires: ISODateString
 }
 
 /**

types/tests/react.test.ts

@@ -8,7 +8,7 @@ const clientSession = {
     image: "path/to/img",
   },
   accessToken: "123z",
-  expires: new Date(),
+  expires: "1234",
 }
 
 /**
@@ -90,7 +90,7 @@ client.SessionProvider({
 client.SessionProvider({
   children: null,
   session: {
-    expires: new Date(),
+    expires: "1234",
   },
   baseUrl: "https://foo.com",
   basePath: "/",

types/tests/server.test.ts

@@ -1,5 +1,5 @@
 import Providers, { OAuthConfig } from "next-auth/providers"
-import { Adapter } from "next-auth/adapters"
+import { Adapter, AdapterSession, AdapterUser } from "next-auth/adapters"
 import NextAuth, * as NextAuthTypes from "next-auth"
 import { IncomingMessage, ServerResponse } from "http"
 import { Socket } from "net"
@@ -40,13 +40,13 @@ const simpleConfig = {
   ],
 }
 
-const exampleUser: NextAuthTypes.User = {
+const exampleUser: AdapterUser = {
   name: "",
   image: "",
   email: "",
 }
 
-const exampleSession: NextAuthTypes.Session = {
+const exampleSession: AdapterSession = {
   expires: new Date(),
 }