import type { PrefixPostTarget, PrefixUploadTransportControl } from './control-v2.mts';
import { type PrefixTransportIdentity } from './keys.mts';
export interface PrefixPostSigner {
    signPost(keyPrefix: string, ttlSeconds: number, maxObjectBytes: number): Promise<PrefixPostTarget>;
}
export interface MintPrefixUploadOptions {
    readonly ttlSeconds?: number;
    readonly maxObjectBytes?: number;
    readonly now?: () => Date;
}
export declare const DEFAULT_TRANSPORT_TTL_SECONDS = 14400;
export declare function transportExpiresAt(options: MintPrefixUploadOptions): string;
export declare function mintPrefixUploadControl(value: PrefixTransportIdentity, signer: PrefixPostSigner, options?: MintPrefixUploadOptions): Promise<PrefixUploadTransportControl>;