getResendClient (src/server.ts)

Module exposing: getResendClient, isResendConfigured, getResendTopicId, createResendContactProperties, createResendContactPayload, addSubscriberContact, isAlreadyExistsError

// Source: https://github.com/thedaviddias/Front-End-Checklist | License: MIT | Copyright 2017-2026 David Dias
// Provided via justclaw.it.com; keep this notice with the code.
import { Resend } from 'resend'

let resendClient: Resend | null | undefined

const DEFAULT_RESEND_TOPIC_ID = 'cdb0d440-4825-412a-8152-29681e8155b7'
const DEFAULT_CONTACT_LANGUAGE = 'en'
const DEFAULT_CONTACT_SOURCE_DOMAIN = 'frontendchecklist.io'
const DEFAULT_CONTACT_BRAND = 'frontendchecklist'

type ResendContactSegment = {
  id: string
}

type ResendContactTopic = {
  id: string
  subscription: 'opt_in'
}

type ResendContactProperties = {
  product: 'newsletter' | 'waitlist'
  user_type: 'subscriber' | 'waitlist'
  language: string
  source_domain: string
  brand: string
}

type ResendContactKind = 'subscriber' |

... (truncated -- full source via MCP)