41+export async function verifySignIn(res: AuthResponse) {
42+ const challenge = await challenges.take(res.id);
43+ if (!challenge || challenge.expiresAt < now()) {
44+ throw new SignInError("challenge_expired");
45+ }
46+ const key = await passkeys.find(res.credentialId);
47+ if (!key || key.revokedAt) {
48+ throw new SignInError("unknown_passkey");
49+ }
50+ await verifyAssertion(res, challenge, key);
51+ await passkeys.touch(key.id, { lastUsedAt: now() });
52+ return sessions.open(key.userId, { method: "passkey" });
53+}
54+
55+export async function startSignIn(email?: string) {
56+ const challenge = await challenges.create({ ttl: 120 });
57+ return { challenge: challenge.value, allowCredentials: [] };
58+}
