import type { IncomingMessage, ServerResponse } from 'node:http';
import type { RpcUsageCumulativeSnapshot } from '@origintrail-official/dkg-chain';
export declare const RPC_USAGE_SNAPSHOT_PATH = "/api/diagnostics/rpc-usage";
export declare function isLoopbackAddress(address: string | undefined): boolean;
/**
 * Serve the already-authenticated, loopback-only accounting snapshot. Keeping
 * the route outside `/api/status` prevents public health polling from exposing
 * diagnostics or changing the status contract.
 */
export declare function handleRpcUsageSnapshotRequest(input: {
    readonly req: IncomingMessage;
    readonly res: ServerResponse;
    readonly url: URL;
    readonly authenticated: boolean;
    readonly snapshot: () => RpcUsageCumulativeSnapshot;
}): boolean;
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