import { Commitment, Connection, ConnectionConfig } from "@solana/web3.js";
export declare class Sequential {
    private connections;
    private next;
    constructor(connections: Connection[]);
    start(): void;
    getConnection(): IterableIterator<Connection>;
}
declare class AdvancedConnection extends Connection {
    private readonly connections;
    private readonly strategy;
    private readonly overrides;
    constructor(endpoints: string[], commitmentOrConfig?: Commitment | ConnectionConfig);
    private executeWithCallback;
}
export default AdvancedConnection;