import type { NormalizedBleError } from '../backend-contract/errors.js';
import type { StreamTerminalNotice } from '../backend-contract/streams.js';
import type { ScanStateEvent } from './ble-manager.js';
type ScanSourceTerminalError = NormalizedBleError | null | undefined;
type ScanSourceTerminalObserver = (reason: StreamTerminalNotice['reason'], error?: ScanSourceTerminalError) => void;
export interface ScanStateController {
    readonly stream: AsyncIterable<ScanStateEvent>;
    emit(event: ScanStateEvent): void;
    close(): void;
}
/**
 * Projects a source/host terminal into public scan state.
 *
 * This is ended delivery, not physical cleanup: `source-failed`,
 * `connection-lost`, and `overflow` become `failed`; ordinary close becomes
 * `stopped`. `stop()` still reports remaining native/session cleanup.
 */
export declare function projectScanDeliveryTerminal(reason: StreamTerminalNotice['reason']): ScanStateEvent;
/** Observes producer-side terminal methods so state updates without an iterator. */
export declare function bindScanSourceTerminal(source: object, onTerminal: ScanSourceTerminalObserver): void;
export declare function createScanState(): ScanStateController;
export {};
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