import { internal } from '@launchdarkly/js-sdk-common';
import { ItemDescriptor } from './ItemDescriptor';
/**
 * FlagStore used to store flag data in memory.
 */
export default interface FlagStore {
    /**
     * Initializes the flag store with the given flags.
     */
    init(newFlags: {
        [key: string]: ItemDescriptor;
    }): void;
    /**
     * Inserts or updates the flag with the given key and update.
     */
    insertOrUpdate(key: string, update: ItemDescriptor): void;
    /**
     * Gets the flag with the given key.
     */
    get(key: string): ItemDescriptor | undefined;
    /**
     * Gets all the flags in the flag store.
     */
    getAll(): {
        [key: string]: ItemDescriptor;
    };
    /**
     * Applies a changeset to the store without version checks.
     * - `'full'`: replaces all flags.
     * - `'partial'`: merges updates into existing flags.
     * - `'none'`: no-op.
     */
    applyChanges(updates: {
        [key: string]: ItemDescriptor;
    }, type: internal.PayloadType): void;
}
/**
 * Creates the default implementation of the flag store.
 */
export declare function createDefaultFlagStore(): FlagStore;
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