/**
 * OAuth callback result
 */
export interface CallbackResult {
    code?: string;
    state?: string;
    error?: string;
    error_description?: string;
}
export interface CallbackServerHandle {
    waitForCallback: () => Promise<CallbackResult>;
    close: () => void;
}
/**
 * Start a local HTTP server to handle OAuth callback
 * Returns a promise that resolves when server is listening, with a handle to wait for callback
 * If the requested port is in use, will automatically try ports +1, +2, +3, etc. up to 10 attempts
 *
 * @param port - The desired callback port
 * @param serverUrl - The URL of the server under test (to avoid port conflicts)
 */
export declare function startCallbackServer(port: number, serverUrl?: string, additionalUrlsToAvoid?: string[]): Promise<CallbackServerHandle & {
    actualPort: number;
}>;
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