# `CCXT.WS.Auth.Sha384Nonce`
[🔗](https://github.com/ZenHive/ccxt_client/blob/main/lib/ccxt/ws/auth/sha384_nonce.ex#L1)

SHA384 Nonce auth pattern — bitfinex.

Signs `"AUTH{nonce}"` (nonce = `timestamp_ms`) with HMAC-SHA384 hex and
builds a flat auth frame — no nested `args`.

## Example Frame (bitfinex)

    %{
      "event" => "auth",
      "apiKey" => "api_key",
      "authSig" => "hex_signature",
      "authNonce" => 1699999999999,
      "authPayload" => "AUTH1699999999999"
    }

## Config

| Key | Default | Purpose |
|---|---|---|
| `:event_value` | `"auth"` | Top-level event field |
| `:timestamp_ms_override` | (unset) | Test-only — freezes the nonce |

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