export declare enum Operator {
    Empty = "EMPTY",
    True = "TRUE",
    StrEqual = "STR_EQUAL",
    StrEqualSoft = "STR_EQUAL_SOFT",
    StrStartsWith = "STR_STARTS_WITH",
    StrEndsWith = "STR_ENDS_WITH",
    StrContains = "STR_CONTAINS",
    Percentage = "PERCENTAGE",
    ArrOverlap = "ARR_OVERLAP",
    RegExp = "REGEXP",
    StrBefore = "STR_BEFORE",
    StrAfter = "STR_AFTER",
    Eq = "EQ",
    Lt = "LT",
    Gt = "GT",
    DateAfter = "DATE_AFTER",
    DateBefore = "DATE_BEFORE",
    SemverEq = "SEMVER_EQ",
    SemverGte = "SEMVER_GTE",
    SemverLte = "SEMVER_LTE"
}
export type Rule = {
    key: string;
    operator: Operator.Empty | Operator.True;
    negate: boolean;
} | {
    key: string;
    operator: Operator.Percentage;
    rangeStart: number;
    rangeEnd: number;
    seed: number;
    negate?: boolean;
} | {
    key: string;
    operator: Operator.StrEqual | Operator.StrEqualSoft | Operator.StrStartsWith | Operator.StrEndsWith | Operator.StrContains | Operator.ArrOverlap;
    values: string[];
    negate: boolean;
} | {
    key: string;
    operator: Operator.RegExp;
    value: string;
    negate: boolean;
} | {
    key: string;
    operator: Operator.StrBefore | Operator.StrAfter;
    value: string;
    negate?: boolean;
} | {
    key: string;
    operator: Operator.SemverEq | Operator.SemverGte | Operator.SemverLte;
    version: number[];
    negate: boolean;
} | {
    key: string;
    operator: Operator.Eq | Operator.Lt | Operator.Gt;
    value: number;
    negate: boolean;
} | {
    key: string;
    operator: Operator.DateAfter | Operator.DateBefore;
    timestamp: number;
    iso: string;
    negate?: boolean;
};
export type Variation = {
    active: boolean;
    value: any;
};
export type Condition = {
    rules: Rule[];
    variation: Variation;
};
export type Flag = {
    defaultVariation: Variation;
    conditions: Condition[];
};
export declare const evalFlag: (context: Record<string, any>, flag: Flag) => any;
export declare const evalRules: (context: Record<string, any>, rules: Rule[]) => boolean;
export declare const evalRule: (rule: Rule, value: unknown) => boolean;