nautilus_bitmex/http/
error.rs

1// -------------------------------------------------------------------------------------------------
2//  Copyright (C) 2015-2025 Nautech Systems Pty Ltd. All rights reserved.
3//  https://nautechsystems.io
4//
5//  Licensed under the GNU Lesser General Public License Version 3.0 (the "License");
6//  You may not use this file except in compliance with the License.
7//  You may obtain a copy of the License at https://www.gnu.org/licenses/lgpl-3.0.en.html
8//
9//  Unless required by applicable law or agreed to in writing, software
10//  distributed under the License is distributed on an "AS IS" BASIS,
11//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12//  See the License for the specific language governing permissions and
13//  limitations under the License.
14// -------------------------------------------------------------------------------------------------
15
16//! Error structures and enumerations for the BitMEX integration.
17
18use nautilus_network::http::HttpClientError;
19use reqwest::StatusCode;
20use serde::{Deserialize, Serialize};
21use thiserror::Error;
22
23/// Build error for query parameter validation.
24#[derive(Debug, Clone, Error)]
25pub enum BitmexBuildError {
26    /// Missing required symbol.
27    #[error("Missing required symbol")]
28    MissingSymbol,
29    /// Invalid count value.
30    #[error("Invalid count: must be between 1 and 500")]
31    InvalidCount,
32    /// Invalid start value.
33    #[error("Invalid start: must be non-negative")]
34    InvalidStart,
35    /// Invalid time range: `start_time` should be less than `end_time`.
36    #[error(
37        "Invalid time range: start_time ({start_time}) must be less than end_time ({end_time})"
38    )]
39    InvalidTimeRange { start_time: i64, end_time: i64 },
40    /// Both orderID and clOrdID specified.
41    #[error("Cannot specify both 'orderID' and 'clOrdID'")]
42    BothOrderIds,
43    /// Missing required order identifier.
44    #[error("Missing required order identifier (orderID or clOrdID)")]
45    MissingOrderId,
46}
47
48/// Represents the JSON structure of an error response returned by the BitMEX API.
49#[derive(Clone, Debug, Deserialize, Serialize)]
50pub struct BitmexErrorResponse {
51    /// The top-level error object included in the BitMEX error response.
52    pub error: BitmexErrorMessage,
53}
54
55/// Contains the specific error details provided by the BitMEX API.
56#[derive(Clone, Debug, Deserialize, Serialize)]
57pub struct BitmexErrorMessage {
58    /// A human-readable explanation of the error condition.
59    pub message: String,
60    /// A short identifier or category for the error, as returned by BitMEX.
61    pub name: String,
62}
63
64/// A typed error enumeration for the BitMEX HTTP client.
65#[derive(Debug, Clone, Error)]
66pub enum BitmexHttpError {
67    /// Error variant when credentials are missing but the request is authenticated.
68    #[error("Missing credentials for authenticated request")]
69    MissingCredentials,
70    /// Errors returned directly by BitMEX.
71    #[error("BitMEX error {error_name}: {message}")]
72    BitmexError { error_name: String, message: String },
73    /// Failure during JSON serialization/deserialization.
74    #[error("JSON error: {0}")]
75    JsonError(String),
76    /// Parameter validation error.
77    #[error("Parameter validation error: {0}")]
78    ValidationError(String),
79    /// Build error for query parameters.
80    #[error("Build error: {0}")]
81    BuildError(#[from] BitmexBuildError),
82    /// Generic network error (for retries, cancellations, etc).
83    #[error("Network error: {0}")]
84    NetworkError(String),
85    /// Any unknown HTTP status or unexpected response from BitMEX.
86    #[error("Unexpected HTTP status code {status}: {body}")]
87    UnexpectedStatus { status: StatusCode, body: String },
88}
89
90impl From<HttpClientError> for BitmexHttpError {
91    fn from(error: HttpClientError) -> Self {
92        Self::NetworkError(error.to_string())
93    }
94}
95
96impl From<String> for BitmexHttpError {
97    fn from(error: String) -> Self {
98        Self::ValidationError(error)
99    }
100}
101
102// Allow use of the `?` operator on `serde_json` results inside the HTTP
103// client implementation by converting them into our typed error.
104impl From<serde_json::Error> for BitmexHttpError {
105    fn from(error: serde_json::Error) -> Self {
106        Self::JsonError(error.to_string())
107    }
108}
109
110impl From<BitmexErrorResponse> for BitmexHttpError {
111    fn from(error: BitmexErrorResponse) -> Self {
112        Self::BitmexError {
113            error_name: error.error.name,
114            message: error.error.message,
115        }
116    }
117}
118
119#[cfg(test)]
120mod tests {
121    use rstest::rstest;
122
123    use super::*;
124
125    #[rstest]
126    fn test_bitmex_build_error_display() {
127        let error = BitmexBuildError::MissingSymbol;
128        assert_eq!(error.to_string(), "Missing required symbol");
129
130        let error = BitmexBuildError::InvalidCount;
131        assert_eq!(
132            error.to_string(),
133            "Invalid count: must be between 1 and 500"
134        );
135
136        let error = BitmexBuildError::InvalidTimeRange {
137            start_time: 100,
138            end_time: 50,
139        };
140        assert_eq!(
141            error.to_string(),
142            "Invalid time range: start_time (100) must be less than end_time (50)"
143        );
144    }
145
146    #[rstest]
147    fn test_bitmex_error_response_from_json() {
148        let json = r#"{
149            "error": {
150                "message": "Invalid API Key.",
151                "name": "HTTPError"
152            }
153        }"#;
154
155        let error_response: BitmexErrorResponse = serde_json::from_str(json).unwrap();
156        assert_eq!(error_response.error.message, "Invalid API Key.");
157        assert_eq!(error_response.error.name, "HTTPError");
158    }
159
160    #[rstest]
161    fn test_bitmex_http_error_from_error_response() {
162        let error_response = BitmexErrorResponse {
163            error: BitmexErrorMessage {
164                message: "Rate limit exceeded".to_string(),
165                name: "RateLimitError".to_string(),
166            },
167        };
168
169        let http_error: BitmexHttpError = error_response.into();
170        assert_eq!(
171            http_error.to_string(),
172            "BitMEX error RateLimitError: Rate limit exceeded"
173        );
174    }
175
176    #[rstest]
177    fn test_bitmex_http_error_from_json_error() {
178        let json_err = serde_json::from_str::<BitmexErrorResponse>("invalid json").unwrap_err();
179        let http_error: BitmexHttpError = json_err.into();
180        assert!(http_error.to_string().contains("JSON error"));
181    }
182
183    #[rstest]
184    fn test_bitmex_http_error_from_string() {
185        let error_msg = "Invalid parameter value".to_string();
186        let http_error: BitmexHttpError = error_msg.into();
187        assert_eq!(
188            http_error.to_string(),
189            "Parameter validation error: Invalid parameter value"
190        );
191    }
192
193    #[rstest]
194    fn test_unexpected_status_error() {
195        let error = BitmexHttpError::UnexpectedStatus {
196            status: StatusCode::BAD_GATEWAY,
197            body: "Server error".to_string(),
198        };
199        assert_eq!(
200            error.to_string(),
201            "Unexpected HTTP status code 502 Bad Gateway: Server error"
202        );
203    }
204}
nautilus_bitmex/http/error.rs

nautilus_bitmex/http/
error.rs
