import type { LedgerEntry } from '../core/types.js';
/**
 * SQLite-backed append-only ledger store.
 * Each entry is stored as a row with JSON-serialized input/output fields.
 */
export declare class LedgerStore {
    private db;
    constructor(storagePath?: string);
    private init;
    append(entry: LedgerEntry): void;
    getHead(): LedgerEntry | null;
    getAll(): LedgerEntry[];
    getRecent(count: number): LedgerEntry[];
    query(filter: {
        agent?: string;
        sessionId?: string;
        model?: string;
        operation?: string;
        since?: string;
        until?: string;
        limit?: number;
    }): LedgerEntry[];
    /**
     * Tamper with an entry (for demo/testing purposes ONLY).
     * Simulates an attacker modifying a recorded entry.
     */
    _tamper(sequence: number, field: string, value: string): boolean;
    close(): void;
    private rowToEntry;
}
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