import type { SharedValue } from 'react-native-reanimated';
export type TransitionState = 'ENTERING' | 'ENTERED' | 'EXITING' | 'EXITED';
export interface TransitionOptions {
    /** Whether the component is transitioning in (visible). */
    in: boolean;
    /** Duration in ms or per-direction object. Defaults to 300. */
    timeout?: number | {
        enter: number;
        exit: number;
    };
    /** If true, don't mount children until `in` becomes true for the first time. */
    mountOnEnter?: boolean;
    /** If true, unmount children after they have fully exited. */
    unmountOnExit?: boolean;
}
export interface TransitionResult {
    /** Current transition state. */
    state: TransitionState;
    /**
     * Animated progress value: 0 = fully exited, 1 = fully entered.
     * Use this inside `useAnimatedStyle()` in each consumer to derive transforms.
     */
    progress: SharedValue<number>;
    /** Whether the children should currently be in the React tree. */
    shouldMount: boolean;
}
/**
 * Shared transition state-machine hook consumed by Fade, Grow, Slide, Zoom, Collapse.
 *
 * Manages:
 * - ENTERING / ENTERED / EXITING / EXITED state machine
 * - Reanimated `progress` SharedValue (0 → 1) driven by `withTiming` worklets
 * - `reduceMotion` short-circuit (instant jump when the OS setting is active)
 * - `mountOnEnter` / `unmountOnExit` lifecycle flags
 *
 * Each consumer derives its own `useAnimatedStyle()` from `progress.value`.
 */
export declare function useTransition(options: TransitionOptions): TransitionResult;
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