| 1 | import { Checksum, SourceData } from "@aws-sdk/types";
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| 2 | export declare class Sha256 implements Checksum {
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| 3 | private readonly secret?;
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| 4 | private operation;
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| 5 | constructor(secret?: SourceData);
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| 6 | update(toHash: SourceData): void;
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| 7 | digest(): Promise<Uint8Array>;
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| 8 | reset(): void;
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| 9 | }
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