SVCB

SVCB adds a Service Binding record to a domain. The name should be the relative label for the record. Use @ for the domain apex.

The priority must be a positive number, the address should be an ip address, either a string, or a numeric value obtained via IP.

The params may be configured to specify the alpn, ipv4hint, ipv6hint, ech or port setting. Several params may be joined by a space. Not existing params may be specified as an empty string ""

Modifiers can be any number of record modifiers or JSON objects, which will be merged into the record's metadata.

dnsconfig.js

D("example.com", REG_MY_PROVIDER, DnsProvider(DSP_MY_PROVIDER),
  SVCB("@", 1, ".", "ipv4hint=123.123.123.123 alpn=h3,h2 port=443"),
);