import type { SourceRequest } from './contract.js';
import type { Transport } from './transport.js';
export interface BurstCoalescingOptions {
    ttlMs: number;
    shouldCache(req: SourceRequest): boolean;
    now?: () => number;
}
export declare function createBurstCoalescingTransport(inner: Transport, opts: BurstCoalescingOptions): Transport;