import type { SdkFrame } from "./types";
export declare const REVERSE_HEARTBEAT_MS = 5000;
export declare const REVERSE_LEASE_TTL_MS = 15000;
export declare const REVERSE_RECLAIM_GRACE_MS = 15000;
export declare const MAX_REVERSE_OUTSTANDING = 64;
export declare const MAX_REVERSE_PAYLOAD_BYTES: number;
/**
 * Matches the raw WebSocket frame ceiling in crates/gjc-sdk/src/server.rs.
 * Reverse responses must fit after their protocol envelope is serialized.
 */
export declare function assertReverseResponseFrame(frame: SdkFrame): void;
export declare class ReverseLeaseError extends Error {
    readonly code: "lease_unavailable" | "lease_expired" | "provider_lease_conflict" | "provider_required" | "not_lease_owner" | "payload_too_large" | "too_many_outstanding" | "unknown_request" | "idempotency_conflict";
    constructor(code: "lease_unavailable" | "lease_expired" | "provider_lease_conflict" | "provider_required" | "not_lease_owner" | "payload_too_large" | "too_many_outstanding" | "unknown_request" | "idempotency_conflict", message?: "idempotency_conflict" | "lease_expired" | "lease_unavailable" | "not_lease_owner" | "payload_too_large" | "provider_lease_conflict" | "provider_required" | "too_many_outstanding" | "unknown_request");
}
export interface ProviderLease {
    leaseId: string;
    connectionId: string;
    capability: string;
    definitions: unknown;
    expiresAt: number;
    graceUntil?: number;
    active: boolean;
}
export interface ReverseLeaseOptions {
    now?: () => number;
    leaseTtlMs?: number;
    sendFrame: (connectionId: string, frame: SdkFrame) => unknown;
    installDefinitions?: (capability: string, definitions: unknown) => void;
    onCancel?: (requestId: string, reason: "provider_disconnected" | "lease_released") => void;
    onDefinitionsRemoved?: (capability: string) => void;
}
/** Session-local directed reverse RPC lease registry. */
export declare class ReverseLeaseRuntime {
    #private;
    constructor(options: ReverseLeaseOptions);
    registerProvider(connectionId: string, capability: string, definitions: unknown, expectedLeaseId?: string, idempotencyKey?: string): ProviderLease;
    heartbeat(connectionId: string, leaseId: string): ProviderLease;
    release(connectionId: string, leaseId: string, handoffTo?: string): ProviderLease;
    disconnect(connectionId: string): void;
    request(capability: string, method: string, payload: unknown, signal?: AbortSignal): Promise<unknown>;
    respond(connectionId: string, id: string, leaseId: string, result: unknown, error?: {
        code: string;
        message: string;
    }): void;
    getLease(capability: string): ProviderLease | undefined;
    /** Installed definitions are observable only while their provider lease is live. */
    getInstalledDefinitions(capability: string): unknown | undefined;
    dispose(): void;
}