Method extractErrorMessage

core/src/utils/error-mapper.ts:272–356

* Extracts error message from various error formats

(error: unknown)

     * Extracts error message from various error formats
     */
    protected extractErrorMessage(error: unknown): string {
        // Axios error with response data
        if (axios.isAxiosError(error) && error.response?.data) {
            const data: unknown = error.response.data;

            // Try various common error message paths
            if (typeof data === 'string') {
                return data;
            }

            if (typeof data === 'object' && data !== null) {
                const obj = data as Record<string, unknown>;

                if (obj.error) {
                    if (typeof obj.error === 'string') {
                        return obj.error;
                    }
                    if (typeof obj.error === 'object' && obj.error !== null && 'message' in obj.error) {
                        return String((obj.error as Record<string, unknown>).message);
                    }
                }

                if (typeof obj.message === 'string') {
                    return obj.message;
                }

                if (typeof obj.errorMsg === 'string') {
                    return obj.errorMsg;
                }
            }

            // Fallback to stringified data
            return JSON.stringify(data);
        }

        // Plain object with status and data (e.g., Polymarket clob-client errors)
        // These aren't AxiosError instances but have similar structure
        if (isPlainErrorObject(error)) {
            const data: unknown = error.data;

            if (data) {
                const extracted = this.extractFromData(data);
                if (extracted) {
                    return extracted;
                }
            }

            // Check for message at top level
            if (error.message && typeof error.message === 'string') {
                return error.message;
            }

            if (error.statusText && typeof error.statusText === 'string') {
                return error.statusText;
            }
        }

        // Standard Error object - check for attached response data from third-party SDKs