import { type RuntimeState } from './config.js';
import { type ExternalUpgradeJob, type ExternalUpgradeOperation } from './upgrade-job.js';
import { type VersionPointer } from './version-store.js';
import { type WorkerHostDeps, type WorkerHostResult } from './worker-host.js';
export interface ExternalUpgradeResult {
    job: ExternalUpgradeJob;
    workerHost: WorkerHostResult;
}
export interface ExternalUpgradeOptions {
    targetSelection: VersionPointer;
    operation?: ExternalUpgradeOperation;
    channel: 'latest' | 'beta';
    requestId?: string;
    prepareTarget?: (job: ExternalUpgradeJob) => Promise<VersionPointer>;
    onJobCreated?: (job: ExternalUpgradeJob) => void;
    runtime?: RuntimeState;
    workerSourcePath?: string;
    workerHostDeps?: WorkerHostDeps;
    handoffTimeoutMs?: number;
    targetStartTimeoutMs?: number;
    finalizationTimeoutMs?: number;
    waitForTargetStarted?: boolean;
    waitForCompletion?: boolean;
    completionTimeoutMs?: number;
    testFailLocalHealthVersion?: string;
    now?: () => Date;
    sleep?: (milliseconds: number) => Promise<void>;
}
export declare function validateExternalUpgradeTarget(current: string, target: string, operation: ExternalUpgradeOperation): void;
export declare function startExternalWorkerUpgrade(options: ExternalUpgradeOptions): Promise<ExternalUpgradeResult>;