export type VariantStrategy = "random" | "round-robin" | "deterministic" | "weighted";
export type VariantItem = {
    id?: string;
} & Record<string, unknown>;
export type VariantSelectionInput = {
    strategy?: VariantStrategy;
    variants: VariantItem[];
    weights?: number[];
    seed?: string | number | null;
    roundRobinIndexProvider?: () => Promise<number> | number;
};
export declare function hashToInt(input: string): number;
export declare function selectVariant(input: VariantSelectionInput): Promise<{
    variant: VariantItem;
    index: number;
} | null>;
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