import { type S3Config } from '../../resource/s3/config.ts';
import { SessionStore, type SessionFields } from './store.ts';
/**
 * SessionStore backed by per-session S3 objects.
 *
 * One object per session at `{keyPrefix}sessions/{session_id}.json`
 * (the store appends the `sessions/` segment, mirroring the Redis
 * store's `{keyPrefix}sessions` hash). Conditional writes (If-Match
 * on the compare-read's ETag) give the same generation-CAS contract
 * as the Redis Lua script, so the S3 control plane is safe for the
 * same multi-process sharing. Works on any S3-compatible backend that
 * honors conditional PUTs. Mirrors the Python S3SessionStore.
 */
export declare class S3SessionStore extends SessionStore {
    private readonly records;
    constructor(config: S3Config);
    load(): Promise<Map<string, SessionFields>>;
    set(sessionId: string, fields: SessionFields): Promise<void>;
    casSet(sessionId: string, fields: SessionFields, expectedGeneration: number): Promise<boolean>;
    delete(sessionIds: readonly string[]): Promise<void>;
    replaceAll(entries: Map<string, SessionFields>): Promise<void>;
    clear(): Promise<void>;
    close(): Promise<void>;
}
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