import { Hmac as LDHmac } from '@launchdarkly/js-server-sdk-common';
import { SupportedHashAlgorithm, SupportedOutputEncoding } from './types';
export default class CryptoJSHmac implements LDHmac {
    private _cryptoJSHmac;
    constructor(algorithm: SupportedHashAlgorithm, key: string);
    digest(encoding: SupportedOutputEncoding): string;
    update(data: string): this;
}
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