import type { UsageInfo } from "./license.js";
export type UsageCacheState = "valid" | "invalid_sig" | "missing";
export declare function getUsageCacheState(): UsageCacheState;
export declare function readUsageCache(expectedInstallationId: string, filePath?: string): UsageInfo | null;
export declare function writeUsageCache(usage: UsageInfo, verdictSig: string, installationId: string, filePath?: string): void;
//# sourceMappingURL=usageCache.d.ts.map