{
  RecordType = [| 'A, 'AAAA, 'CNAME, 'MX, 'TXT, 'SRV, 'CAA, 'NS |],

  RecordSource = [|
    'manual,
    'external_dns,
    'provider_ptr,
  |],

  DnsRecord = {
    zone     | String,
    name     | String,
    type     | RecordType,
    value    | String,
    ttl      | Number,
    priority | Number | optional,
    proxied  | Bool | default = false,
    source   | RecordSource | default = 'manual,
  },

  DnsZone = {
    name        | String,
    provider    | [| 'cloudflare, 'hetzner, 'aws |],
    account_ref | String,
    zone_id     | String | optional,
  },

  DnsChallenge = {
    name      | String,
    token     | String,
    record_id | String | optional,
  },

  RecordKey = { zone | String, name | String, type | RecordType },
}