# `DatadeftAuth.PowChallenge`

Proof-of-work challenge in the shipping browser client's wire shape:
serialize it as JSON for the client verbatim. Every field is public data
the client already sees; the HMAC `tag` binds the tuple so none of it can
be altered.

# `t`

```elixir
@type t() :: %DatadeftAuth.PowChallenge{
  chg: String.t(),
  dif: pos_integer(),
  tag: String.t(),
  tim: String.t()
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*