import { z } from 'zod';
export interface Reader<V = unknown> {
    /** @returns the value for a given key, or null if the key is not present. */
    get: (key: string) => V | null;
}
export interface Writer<V = unknown> {
    /** Sets a key-value pair in the store. */
    set: (key: string, value: V) => void;
}
export interface Deleter {
    /** Deletes a key-value pair from the store. */
    delete: (key: string) => void;
}
export interface KV<R = unknown, W = R> extends Reader<R>, Writer<W>, Deleter {
}
/** A readable key-value store. */
export interface AsyncReader<V = unknown> {
    /** Get the value for a given key. */
    get: (key: string) => Promise<V | null>;
}
/** A writable key-value store. */
export interface AsyncWriter<V = unknown> {
    /** Sets a key-value pair in the store. The value must be serializable. */
    set: (key: string, value: V) => Promise<void>;
}
/** A key-value store that can delete key-value pairs. */
export interface AsyncDeleter {
    /** Deletes a key-value pair from the store. */
    delete: (key: string) => Promise<void>;
}
/** A read-writable key-value store. */
export interface Async<R = unknown, W = R> extends AsyncReader<R>, AsyncWriter<W>, AsyncDeleter {
}
export declare const stringPairZ: z.ZodObject<{
    key: z.ZodString;
    value: z.ZodString;
}, z.core.$strip>;
/** A general purpose key-value pair. */
export interface Pair<V = unknown> {
    key: string;
    value: V;
}
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