{"record":{"id":"862dbdf4ac78f07b","repo":"nautechsystems/nautilus_trader","slug":"invalid-type-for-mmp-value-expected-bool","errorCode":null,"errorMessage":"invalid type for 'mmp': {value}, expected bool","messagePattern":"invalid type for 'mmp': (.+?), expected bool","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"crates/adapters/bybit/src/common/parse.rs","lineNumber":1901,"sourceCode":"    if result.sl_limit_price.is_some() && result.sl_order_type != Some(BybitOrderType::Limit) {\n        anyhow::bail!(\"'sl_limit_price' requires 'sl_order_type' to be 'Limit'\");\n    }\n\n    result.close_on_trigger = params.get_bool(\"close_on_trigger\");\n\n    if let Some(value) = params.get(\"order_iv\") {\n        match get_price_str(params, \"order_iv\") {\n            Some(s) => result.order_iv = Some(s),\n            None => {\n                anyhow::bail!(\"invalid type for 'order_iv': {value}, expected string or number\")\n            }\n        }\n    }\n\n    if let Some(value) = params.get(\"mmp\") {\n        match value.as_bool() {\n            Some(b) => result.mmp = Some(b),\n            None => anyhow::bail!(\"invalid type for 'mmp': {value}, expected bool\"),\n        }\n    }\n\n    if let Some(value) = params.get(\"smp_type\") {\n        let smp_type = value.as_str().ok_or_else(|| {\n            anyhow::anyhow!(\"invalid type for 'smp_type': {value}, expected string\")\n        })?;\n        result.smp_type = Some(parse_smp_type(smp_type)?);\n    }\n\n    if let Some(value) = params.get(\"position_idx\") {\n        let idx = value.as_i64().ok_or_else(|| {\n            anyhow::anyhow!(\"invalid type for 'position_idx': {value}, expected integer\")\n        })?;\n        result.position_idx = Some(match idx {\n            0 => BybitPositionIdx::OneWay,\n            1 => BybitPositionIdx::BuyHedge,\n            2 => BybitPositionIdx::SellHedge,","sourceCodeStart":1883,"sourceCodeEnd":1919,"githubUrl":"https://github.com/nautechsystems/nautilus_trader/blob/18893faf8b356be3320add8de2f861b0b647cf06/crates/adapters/bybit/src/common/parse.rs#L1883-L1919","documentation":"Type validation in parse_bybit_tp_sl_params: the 'mmp' order param exists but its value is not a JSON bool. Bybit requires mmp (market-maker protection) to be a boolean flag, so the raw value is rejected.","triggerScenarios":"Passing 'mmp' as the string \"true\"/\"false\", a number 0/1, or any other non-bool type in params.","commonSituations":"Environment/config-driven flags read as strings; JSON payloads where mmp was serialized as \"true\" instead of true.","solutions":["Pass 'mmp' as an actual boolean (true/false), not a string or number","Coerce the source value with a bool parse before setting it in params"],"exampleFix":"// before\nparams.set(\"mmp\", \"true\");\n// after\nparams.set(\"mmp\", true);","handlingStrategy":"type-guard","validationCode":"fn validate_mmp(params: &Params) -> Result<(), String> {\n    if let Some(v) = params.get(\"mmp\") {\n        if !v.is_bool() {\n            return Err(format!(\"mmp must be bool, got {v}\"));\n        }\n    }\n    Ok(())\n}","typeGuard":"fn as_bool(v: &Value) -> Option<bool> {\n    v.as_bool()\n}","tryCatchPattern":"match parse_bybit_tp_sl_params(&params) {\n    Ok(p) => submit(p),\n    Err(e) if e.to_string().contains(\"invalid type for 'mmp'\") => {\n        log::warn(\"mmp must be a JSON bool, not a string or number\");\n    }\n    Err(e) => return Err(e),\n}","preventionTips":["Pass booleans as JSON true/false, not \"true\"/\"false\" strings","Coerce string flags with a strict parser (\"true\" => true) before setting params","Type-check mmp at config deserialization time"],"tags":["bybit","type-mismatch","bool","params-validation"],"backgroundTag":"type-mismatch","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"}