/// <reference types="node" />
export declare class XdeltaAlgorithm {
    cancelGeneration(encoderId: number): {
        code: number;
        message: string;
    } | undefined;
    generateDelta(oldData: Buffer, newData: Buffer, maxDeltaSize: number, speed: BlockMatchSpeed, callback: DeltaGenerationCallback): number | undefined;
    generateDeltaAsync(oldData: Buffer, newData: Buffer, maxDeltaSize: number, speed: BlockMatchSpeed): Promise<Buffer>;
    applyDelta(oldData: Buffer, delta: Buffer, maxResultSize: number, callback: DeltaGenerationCallback): void;
}
export declare type DeltaGenerationCallbackArg = {
    result: Buffer;
    error?: undefined;
} | {
    result?: undefined;
    error: {
        code: number;
        message: string;
    };
};
export declare type DeltaGenerationCallback = (deltaOperationCallbackArg: DeltaGenerationCallbackArg) => void;
export declare enum BlockMatchSpeed {
    Default = 0,
    Slow = 1,
    Fast = 2,
    Faster = 3,
    Fastest = 4,
    Custom = 5
}
export declare enum DeltaGenerationErrorCodes {
    ENOSPC = 28,
    XD3_CANCELLED = -17715
}