type BaseMutation<T, P> = {
    error: null;
    isPending: true;
    pendingParams: P;
    value: null;
} | {
    error: Error;
    isPending: false;
    pendingParams: P;
    value: null;
} | {
    error: null;
    isPending: false;
    pendingParams: null;
    value: null;
} | {
    error: null;
    isPending: false;
    pendingParams: null;
    value: T;
};
export type Mutation<T, P extends any[]> = BaseMutation<T, P> & {
    mutate: (...args: P) => Promise<T>;
    subscribe: () => () => void;
};
export declare function mutation<T, P extends any[]>(mutator: (...args: P) => Promise<T>): Mutation<T, P>;
export {};