/**
 * `@nifrajs/web-react/fn` - React binding for a server function's pending/error state.
 *
 * Calling a server function needs no hook: the client stub is `(input) => Promise<Output>`. This adds
 * the part a component usually wants around it - in flight, last result, last error - and nothing more.
 *
 * The state machine is `@nifrajs/web`'s `createServerFnStore`, shared with every other adapter, so
 * "is it pending" has one answer rather than five that drift. This file contributes only the `useSyncExternalStore` subscription.
 */
import type { ServerFnReference } from "@nifrajs/web/fn";
import { type ServerFnState } from "@nifrajs/web/fn-state";
/** A server function's state plus the call itself. */
export interface ServerFnHandle<Input, Output> extends ServerFnState<Output> {
    /** Invoke it. Records state, and rejects on failure - attach `.catch` if you only render state. */
    readonly call: (input: Input) => Promise<Output>;
    /** Back to idle. */
    readonly reset: () => void;
}
/**
 * Track one server function's call state.
 *
 *     const addTodo = useServerFn(fns.addTodo)
 *     <button disabled={addTodo.pending} onClick={() => addTodo.call({ text }).catch(() => {})}>
 *
 * The store is per component instance and created once; `fn` is read on the first render only, so a
 * freshly-created inline function neither resets the state nor goes stale.
 */
export declare function useServerFn<Input, Output>(fn: ServerFnReference<Input, Output>): ServerFnHandle<Input, Output>;
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