import { FetchedPayload } from '@xyo-network/huri';
import { XyoSchemaPayload } from '@xyo-network/schema-payload-plugin';
import { XyoSchemaNameToValidatorMap } from './SchemaNameToValidatorMap';
export type XyoSchemaCacheEntry = FetchedPayload<XyoSchemaPayload>;
export declare class XyoSchemaCache<T extends XyoSchemaNameToValidatorMap = XyoSchemaNameToValidatorMap> {
    /**
     * Object representing `null` since LRU Cache types
     * only allow for types that derive from object
     */
    protected static readonly NULL: XyoSchemaCacheEntry;
    private static _instance?;
    onSchemaCached?: (name: string, entry: XyoSchemaCacheEntry) => void;
    proxy?: string;
    private _cache;
    private _validators;
    private getDebounce;
    private constructor();
    static get instance(): XyoSchemaCache<XyoSchemaNameToValidatorMap>;
    /**
     * A map of cached schema (by name) to payload validators for the schema. A schema
     * must be cached via `get('schema.name')` before it's validator can be used as
     * they are compiled dynamically at runtime upon retrieval.
     */
    get validators(): T;
    get(schema?: string): Promise<XyoSchemaCacheEntry | undefined | null>;
    private cacheSchemaIfValid;
    private cacheSchemas;
    private fetchSchema;
}
//# sourceMappingURL=SchemaCache.d.ts.map