The transactional email provider built for Better-Auth & modern TypeScript applications

import { betterAuth } from 'better-auth';
import { SadaSend } from 'sadasend';

// Initialize SadaSend with your scoped API key
const sadasend = new SadaSend({
  apiKey: process.env.SADASEND_API_KEY!,
});

export const auth = betterAuth({
  emailAndPassword: {
    enabled: true,
    requireEmailVerification: true,
    sendVerificationEmail: async ({ user, url }) => {
      // Sub-150ms verification dispatch with in-flight bounce defense
      await sadasend.emails.send({
        from: 'auth@yourdomain.com',
        to: user.email,
        subject: 'Verify your account',
        html: `<p>Welcome! Click <a href="${url}">here</a> to verify your email address.</p>`,
        verifyBeforeSend: true,
      });
    },
    sendResetPassword: async ({ user, url }) => {
      await sadasend.emails.send({
        from: 'security@yourdomain.com',
        to: user.email,
        subject: 'Reset your password',
        html: `<p>Click <a href="${url}">here</a> to reset your account password.</p>`,
      });
    },
  },
});