declare abstract class Fnv64Base<T> {
    #private;
    constructor();
    protected _updateState([newStateHi, newStateLo]: [number, number]): void;
    reset(): void;
    abstract write(data: Uint8Array): T;
    size(): number;
    blockSize(): number;
    sum64(): [number, number];
    sum(): Uint8Array;
}
/** Fnv64 hash */
export declare class Fnv64 extends Fnv64Base<Fnv64> {
    write(data: Uint8Array): Fnv64;
}
/** Fnv64a hash */
export declare class Fnv64a extends Fnv64Base<Fnv64a> {
    write(data: Uint8Array): Fnv64;
}
export {};