export interface EventTrackingIntegration<InEvent, OutEvent, CommonEventInfo> {
    name: string;
    transformEvent?: EventTransformer<InEvent, OutEvent>;
    init?: () => Promise<void>;
    sendEvent?: (infos: OutEvent, commonInfos: CommonEventInfo) => Promise<void>;
}
export interface UserPropertiesTrackingIntegration<InUserInfo, OutUserInfo> {
    name: string;
    init?: () => Promise<void>;
    transformUserProperties?: UserPropertyTransformer<InUserInfo, OutUserInfo>;
    updateUserProperties?: (userId: string, userInfo: InUserInfo) => Promise<void>;
}
export declare type TrackingIntegration<InEvent, OutEvent, CommonEventInfo, InUserInfo, OutUserInfo> = EventTrackingIntegration<InEvent, OutEvent, CommonEventInfo> & UserPropertiesTrackingIntegration<InUserInfo, OutUserInfo>;
export declare type DelayFunction = () => Promise<void>;
export declare type Logger = {
    info: Function;
    warn: Function;
    error: Function;
};
export declare type CreateSendEventOptions<InEvent, OutEvent, CommonEventInfo> = {
    integrations: readonly EventTrackingIntegration<InEvent, OutEvent, CommonEventInfo>[];
    logger?: Logger;
    delayFunction?: DelayFunction;
};
export declare type CreateUpdateUserProperties<UserProperties> = {
    integrations: UserPropertiesTrackingIntegration<UserProperties, unknown>[];
    logger?: Logger;
};
export declare type EventTransformer<InEvent, OutEvent> = (event: InEvent) => OutEvent | OutEvent[];
export declare type UserPropertyTransformer<InUserInfo, OutUserInfo> = (userInfo: InUserInfo) => OutUserInfo | null;