import type { DriverFactory, EmailDriver } from "../types.mjs";
export interface RoundRobinOptions {
	drivers: ReadonlyArray<EmailDriver>;
	/** Optional integer weights — `[2, 1, 1]` sends 2 messages to `drivers[0]`
	*  for every 1 sent to the others. Defaults to equal weighting. */
	weights?: ReadonlyArray<number>;
}
/** Cycle through drivers per-send. Unlike `fallback`, errors are *not*
*  retried on another driver — use `fallback` (or `withRetry`) for that. */
declare const roundRobin: DriverFactory<RoundRobinOptions>;
export default roundRobin;