import type { FingerprintContextV3 } from "./canonical.js";
export declare const FINGERPRINT_KEY_STORE_RELATIVE_PATH: ".harnery/private/fingerprint-keys.json";
export interface FingerprintKeyEpochV3 {
    epoch_id: `pep_${string}`;
    key_base64url: string;
    created_at: string;
}
export interface FingerprintKeyStoreV3 {
    format: "harnery-v3-fingerprint-keys";
    format_version: 1;
    active_epoch_id: `pep_${string}`;
    epochs: FingerprintKeyEpochV3[];
}
export interface RotateFingerprintEpochV3Options {
    activeGenerationCount: number;
    now?: () => Date;
}
export declare function fingerprintKeyStorePathV3(coordRoot: string): string;
/** Load the private key store, creating its first epoch under an exclusive publication lock. */
export declare function loadOrCreateFingerprintKeyStoreV3(coordRoot: string, now?: () => Date): FingerprintKeyStoreV3;
export declare function readFingerprintKeyStoreV3(coordRoot: string): FingerprintKeyStoreV3;
/** Start a new comparison epoch only when no generation can still emit under the prior key. */
export declare function rotateFingerprintEpochV3(coordRoot: string, options: RotateFingerprintEpochV3Options): FingerprintKeyStoreV3;
export declare function fingerprintContextV3(coordRoot: string, rootId: `root_${string}`, generationId?: `gen_${string}`, epochId?: `pep_${string}`): FingerprintContextV3;
//# sourceMappingURL=fingerprint-keys.d.ts.map