import { LegacyProvider, Subprovider, Omit, RpcError } from '../interfaces';
export declare type Adapted<T extends LegacyProvider> = Omit<T, 'sendAsync'> & Subprovider;
export declare const legacyProviderAdapter: <T extends LegacyProvider>(legacyProvider: T) => Adapted<T>;
export declare class JsonRpcError extends Error {
    readonly code: number;
    constructor(err: RpcError);
}