export interface CallbackResult {
    token: string;
    error?: string;
}
export interface CallbackServer {
    port: number;
    waitForCallback(timeoutMs?: number): Promise<CallbackResult>;
    stop(): Promise<void>;
}
export interface CallbackServerOptions {
    expectedState?: string;
}
export declare function startCallbackServer(preferredPort?: number, options?: CallbackServerOptions): Promise<CallbackServer>;
export declare function getCallbackUrl(port: number): string;
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