nautechsystems/nautilus_trader · error

No result in book summary response

Error message

No result in book summary response

What it means

request_book_summaries_kind requires a `result` array from public/get_book_summary_by_currency. The call succeeded at HTTP level but the response had no `result`, so no book summaries can be returned. Deribit omits `result` when it returns an error object.

Source

Thrown at crates/adapters/deribit/src/http/client.rs:1932

    ///
    /// Returns an error if the request fails.
    pub async fn request_book_summaries_kind(
        &self,
        currency: &str,
        kind: Option<&str>,
    ) -> anyhow::Result<Vec<DeribitBookSummaryRaw>> {
        let params = GetBookSummaryByCurrencyParams {
            currency: currency.to_string(),
            kind: kind.map(str::to_string),
        };
        let full_response = self
            .inner
            .get_book_summary_by_currency(params)
            .await
            .map_err(|e| anyhow::anyhow!(e))?;
        full_response
            .result
            .ok_or_else(|| anyhow::anyhow!("No result in book summary response"))
    }

    /// Requests traded option expirations for a settlement currency.
    ///
    /// # Errors
    ///
    /// Returns an error if the request fails.
    pub async fn request_option_expirations(
        &self,
        currency: DeribitCurrency,
    ) -> anyhow::Result<Vec<String>> {
        let params = GetExpirationsParams::new(currency.as_str(), DeribitExpirationKind::Option);
        let full_response = self
            .inner
            .get_expirations(params)
            .await
            .map_err(|e| anyhow::anyhow!(e))?;
        let response = full_response

View on GitHub (pinned to 18893faf8b)

Solutions

1. Confirm the currency code is exact and supported on this environment (test vs main).
2. Check the response `error` field for the JSON-RPC error code.
3. If the currency legitimately has no books, treat empty as expected rather than an error in caller logic.

Example fix

// before
full_response
    .result
    .ok_or_else(|| anyhow::anyhow!("No result in book summary response"))
// after
full_response.result.ok_or_else(|| {
    anyhow::anyhow!(
        "No result in book summary response for {currency} (error: {:?})",
        full_response.error
    )
})

// Ensure currency is supported on this environment before querying
let currencies = ["BTC", "ETH", "SOL", "USDT", "USDC"];
assert!(currencies.contains(&currency.to_uppercase().as_str()));

match client.request_book_summaries(currency).await {
    Ok(s) if s.is_empty() => info!("no books for {currency}"),
    Ok(s) => handle(s),
    Err(e) if e.to_string().contains("No result in book summary") => treat_as_no_market(currency),
    Err(e) => return Err(e),
}

When it happens

Trigger: Calling request_book_summaries/request_book_summaries_kind with a currency that has no instruments or an invalid currency code, yielding an error response with null result.

Common situations: Typo'd or lowercase currency code, querying a currency not listed on the connected environment, or brand-new currency with no published summaries yet.

Understand the failure class

Background: "empty response", "returned no data", "empty embeddings": what HTTP 200-with-empty-body errors mean across libraries — this error's family across 36 libraries.

Related errors

• No result in ticker response
• No result in expirations response
• failed to request AX whoami: {e}
• {e}
• No option expirations for {currency}

AI-assisted analysis of nautechsystems/nautilus_trader@18893faf8b (2026-09-08). Data as JSON: /api/errors/5a360acde5109708. Report an issue: GitHub.