Built-in branded-number custom type: a DateTime crossing the wire as epoch
milliseconds. Emits the TypeScript brand EpochMillis
(a number & { readonly __brand: "EpochMillis" }), so callers can't
accidentally pass a bare number where an instant is expected.
Use per-field as RpcElixir.UnixMillis.t(), or map every DateTime in a router
to it via use RpcElixir.Router, wire_aliases: [{DateTime, RpcElixir.UnixMillis}].
Summary
Types
@type t() :: DateTime.t()
Functions
Deserializes integer epoch milliseconds to {:ok, DateTime.t()} | {:error, atom}.
Serializes a DateTime to integer epoch milliseconds.
TypeScript brand name emitted for this type.
Wire format: a JSON integer (epoch milliseconds).