export default class Salsa20 {
    private readonly fixed;
    private readonly key;
    private readonly nonce;
    private counter;
    private state;
    private block;
    private position;
    constructor(key: Uint8Array, nonce: Uint8Array);
    private QR;
    private generateBlock;
    process(input: Uint8Array): Uint8Array;
}
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