import { FlagsClient } from '@vercel/flags-core';
import { FlagDeclaration, Adapter, ProviderData } from 'flags';
import { KeyedFlagDefinitionType } from 'flags/next';

type VercelAdapterDeclaration<ValueType, EntitiesType> = Omit<FlagDeclaration<ValueType, EntitiesType>, 'decide' | 'origin'>;
/**
 * Allows creating a custom Vercel adapter for feature flags
 */
declare function createVercelAdapter(sdkKeyOrFlagsClient?: string | FlagsClient): <ValueType, EntitiesType>() => Adapter<ValueType, EntitiesType>;
/**
 * Internal function for testing purposes
 */
declare function resetDefaultVercelAdapter(): void;
/**
 * A default Vercel adapter for feature flags
 *
 */
declare function vercelAdapter<ValueType, EntitiesType>(): Adapter<ValueType, EntitiesType>;
declare function getProviderData(flags: Record<string, KeyedFlagDefinitionType | readonly unknown[]>): Promise<ProviderData>;

export { type VercelAdapterDeclaration, createVercelAdapter, getProviderData, resetDefaultVercelAdapter, vercelAdapter };