{"record":{"id":"eb15cadbd0767ea9","repo":"nautechsystems/nautilus_trader","slug":"no-result-in-ticker-response","errorCode":null,"errorMessage":"No result in ticker response","messagePattern":"No result in ticker response","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/deribit/src/http/client.rs","lineNumber":1890,"sourceCode":"    /// Requests ticker data for a single instrument.\n    ///\n    /// Returns the `DeribitTicker` including its option-chain reference price.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the request fails.\n    pub async fn request_ticker(&self, instrument_name: &str) -> anyhow::Result<DeribitTicker> {\n        let params = GetTickerParams {\n            instrument_name: instrument_name.to_string(),\n        };\n        let response = self\n            .inner\n            .get_ticker(params)\n            .await\n            .map_err(|e| anyhow::anyhow!(e))?;\n        response\n            .result\n            .ok_or_else(|| anyhow::anyhow!(\"No result in ticker response\"))\n    }\n\n    /// Requests book summaries for a currency via `public/get_book_summary_by_currency`.\n    ///\n    /// Defaults to product kind `option`.\n    /// Entries include mark/IV, bid-ask, volumes, and `underlying_price` (forward) when present.\n    ///\n    /// # Errors\n    ///\n    /// Returns an error if the request fails.\n    pub async fn request_book_summaries(\n        &self,\n        currency: &str,\n    ) -> anyhow::Result<Vec<DeribitBookSummaryRaw>> {\n        self.request_book_summaries_kind(currency, Some(\"option\"))\n            .await\n    }\n","sourceCodeStart":1872,"sourceCodeEnd":1908,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/deribit/src/http/client.rs#L1872-L1908","documentation":"request_ticker requires a `result` payload from Deribit's public/ticker. The HTTP request succeeded but the JSON-RPC response contained no `result`, so no TickerData can be returned. Deribit typically omits `result` when it returns an error object instead.","triggerScenarios":"Calling request_ticker with an instrument_name the endpoint cannot resolve (typo, expired/delisted instrument, wrong kind), producing an error response with null/absent result.","commonSituations":"Querying an expired futures/options instrument, a typo'd instrument name, or using the test environment for an instrument that only exists in production.","solutions":["Validate the instrument_name against the current instrument list for the connected environment.","Check the response `error` field/logs for the JSON-RPC error code and message.","Regenerate/refresh the instrument universe periodically so delisted instruments are not requested."],"exampleFix":"// before\nresponse\n    .result\n    .ok_or_else(|| anyhow::anyhow!(\"No result in ticker response\"))\n// after\nresponse.result.ok_or_else(|| {\n    anyhow::anyhow!(\n        \"No result in ticker response for {instrument_name} (error: {:?})\",\n        response.error\n    )\n})","handlingStrategy":"validation","validationCode":"// Verify instrument exists before requesting its ticker\nlet instruments = client.request_instruments(currency, kind).await?;\nassert!(instruments.iter().any(|i| i.name == instrument_name));","typeGuard":null,"tryCatchPattern":"match client.request_ticker(instrument).await {\n    Ok(t) => handle(t),\n    Err(e) if e.to_string().contains(\"No result in ticker response\") => mark_instrument_unavailable(instrument),\n    Err(e) => return Err(e),\n}","preventionTips":["Refresh the instrument universe periodically to drop expired instruments","Match environment: testnet instruments differ from mainnet","Log the response `error` field when result is missing"],"tags":["http","api","empty-response","rust"],"backgroundTag":"empty-api-response","analyzedSha":"18893faf8b356be3320add8de2f861b0b647cf06","analyzedAt":"2026-09-08T20:49:34.690Z","contentChangedAt":"2026-09-08T20:49:34.690Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}