export type PdfGateApiErrorOptions = {
    statusCode?: number;
    responseBody?: string;
    cause?: unknown;
};
export declare class PdfGateApiError extends Error {
    statusCode?: number;
    responseBody?: string;
    cause?: unknown;
    constructor(message: string, options?: PdfGateApiErrorOptions);
}
export declare class PdfGateSignatureVerificationError extends Error {
    constructor(message: string);
}
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