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Manish

•Created by Manish on 4/20/2025 in #help

Cookies not saved in production

I have a node/express backend and a vite react frontend. They are on different urls: Backend: http://my-backend.vercel.app/ auth.ts looks like this:

import { betterAuth } from "better-auth";
import { prismaAdapter } from "better-auth/adapters/prisma";
import { PrismaClient } from "@prisma/client";
 
const prisma = new PrismaClient();
export const auth = betterAuth({
    database: prismaAdapter(prisma, {
        provider: "postgresql",
    }),
    emailAndPassword: {  
      enabled: true
    },
    trustedOrigins: ["http://localhost:5173", "https://my-frontend.vercel.app"],
    cookies: {
        sameSite: "lax",
        path: "/",
        secure: process.env.NODE_ENV === "production",
        httpOnly: true
    }
});

import { betterAuth } from "better-auth";
import { prismaAdapter } from "better-auth/adapters/prisma";
import { PrismaClient } from "@prisma/client";
 
const prisma = new PrismaClient();
export const auth = betterAuth({
    database: prismaAdapter(prisma, {
        provider: "postgresql",
    }),
    emailAndPassword: {  
      enabled: true
    },
    trustedOrigins: ["http://localhost:5173", "https://my-frontend.vercel.app"],
    cookies: {
        sameSite: "lax",
        path: "/",
        secure: process.env.NODE_ENV === "production",
        httpOnly: true
    }
});

Frontend: https://my-frontend.vercel.app

import { createAuthClient } from "better-auth/react"

const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || "http://localhost:3000";

export const authClient = createAuthClient({
    baseURL: API_BASE_URL,
})

import { createAuthClient } from "better-auth/react"

const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || "http://localhost:3000";

export const authClient = createAuthClient({
    baseURL: API_BASE_URL,
})

On local it works fine. But on production, it calls the api, but the session cookie doesn't get saved. Can you please help with what's wrong here?

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