import { Signature } from "@solana/kit";
import { SenderRegion } from "./types";
/**
 * POST a base‑64 transaction to the chosen Sender region.
 * Sender mandates skipPreflight = true and maxRetries = 0
 *
 * Returns the transaction signature
 */
export declare const sendViaSender: (tx64: string, region?: SenderRegion, swqosOnly?: boolean) => Promise<Signature>;
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