import { type BriefingConfig } from "./config.js";
/**
 * Generate a machine fingerprint from hostname + username + salt.
 * Returns the first 16 hex chars of a SHA-256 digest.
 */
export declare function generateFingerprint(): string;
/**
 * Check whether `key` matches the expected UUID format.
 */
export declare function isValidKeyFormat(key: string): boolean;
export interface ActivationResult {
    success: boolean;
    message: string;
}
/**
 * Activate a license key via Lemon Squeezy License API.
 *
 * Flow:
 *   1. Validate key format (UUID)
 *   2. POST /v1/licenses/activate with key + machine fingerprint
 *   3. Verify store_id / product_id ownership
 *   4. Save key + instanceId to local config
 *
 * Falls back to offline activation if the network is unreachable,
 * storing the key locally for later online validation.
 */
export declare function activateLicense(key: string, config: BriefingConfig): Promise<ActivationResult>;
/**
 * Returns `true` if the config contains a license whose key is present and
 * whose fingerprint matches the current machine.
 * Synchronous — no network calls. Used on every briefing run.
 */
export declare function isLicensed(config: BriefingConfig): boolean;
/**
 * Guard: if the user is not licensed, print an upgrade prompt and exit with
 * code 3 so callers can distinguish "not licensed" from other errors.
 */
export declare function requireLicense(config: BriefingConfig, feature: string): void;
/**
 * Return a human-readable license status object.
 *
 * Attempts online validation via Lemon Squeezy (5 s timeout).
 * Falls back to local state on network failure.
 */
export declare function checkLicenseStatus(config: BriefingConfig): Promise<Record<string, any>>;
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