cre-sync/lib/ghl/errors.ts

export class GHLError extends Error {
  constructor(
    public statusCode: number,
    message: string,
    public responseBody?: string
  ) {
    super(message);
    this.name = 'GHLError';
  }

  static isRateLimitError(error: unknown): boolean {
    return error instanceof GHLError && error.statusCode === 429;
  }

  static isAuthError(error: unknown): boolean {
    return error instanceof GHLError &&
      (error.statusCode === 401 || error.statusCode === 403);
  }

  static isNotFoundError(error: unknown): boolean {
    return error instanceof GHLError && error.statusCode === 404;
  }
}