Function verifyUnsubscribeToken

apps/sim/lib/messaging/email/unsubscribe.ts:32–57

(
  email: string,
  token: string
)

 * Verify an unsubscribe token for an email address and return email type
 */
export function verifyUnsubscribeToken(
  email: string,
  token: string
): { valid: boolean; emailType?: string } {
  try {
    const parts = token.split(':')
    if (parts.length < 2) return { valid: false }

    if (parts.length === 2) {
      const [salt, expectedHash] = parts
      const hash = sha256Hex(`${email}:${salt}:${env.BETTER_AUTH_SECRET}`)

      return { valid: hash === expectedHash, emailType: 'marketing' }
    }

    const [salt, expectedHash, emailType] = parts
    if (!salt || !expectedHash || !emailType) return { valid: false }

    const hash = sha256Hex(`${email}:${salt}:${emailType}:${env.BETTER_AUTH_SECRET}`)

    return { valid: hash === expectedHash, emailType }
  } catch (error) {
    logger.error('Error verifying unsubscribe token:', error)
    return { valid: false }
  }
}

/**
 * Check if an email type is transactional