export declare class Sha256 {
    private state;
    private buffer;
    private bufferLength;
    private bytesLow;
    private bytesHigh;
    private finished;
    constructor();
    reset(): void;
    update(data: Uint8Array): void;
    digestBytes(): Uint8Array;
    private serializeState;
    private addBytes;
    private processChunk;
}
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