create-farcaster-mini-app/src/app/.well-known/frames.json/route.ts

export async function GET() {
  const appUrl = process.env.NEXT_PUBLIC_URL;

  const config = {
    accountAssociation: {
      header:
        "eyJmaWQiOjM2MjEsInR5cGUiOiJjdXN0b2R5Iiwia2V5IjoiMHgyY2Q4NWEwOTMyNjFmNTkyNzA4MDRBNkVBNjk3Q2VBNENlQkVjYWZFIn0",
      payload: "eyJkb21haW4iOiJmcmFtZXMtdjIudmVyY2VsLmFwcCJ9",
      signature:
        "MHhiNDIwMzQ1MGZkNzgzYTExZjRiOTllZTFlYjA3NmMwOTdjM2JkOTY1NGM2ODZjYjkyZTAyMzk2Y2Q0YjU2MWY1MjY5NjI5ZGQ5NTliYjU0YzEwOGI4OGVmNjdjMTVlZTdjZDc2YTRiMGU5NzkzNzA3YzkxYzFkOWFjNTg0YmQzNjFi",
    },
    frame: {
      version: "0.0.0",
      name: "Frames v2 Demo",
      icon: `${appUrl}/icon.png`,
      splashImage: `${appUrl}/splash.png`,
      splashBackgroundColor: "#f7f7f7",
      homeUrl: appUrl,
    },
  };

  return Response.json(config);
}