import type { ClientFrame, ServerFrame } from "./frames.js";
import type { TimelineEvent, TimelinePartial } from "./schema.js";
export declare const DECODE_ERROR_CODES: {
    readonly invalid: "invalid";
    readonly unsupported: "unsupported";
    readonly version: "version";
    readonly schema: "schema";
    readonly size: "size";
    readonly direction: "direction";
};
export type DecodeErrorCode = (typeof DECODE_ERROR_CODES)[keyof typeof DECODE_ERROR_CODES];
export declare class DecodeError extends Error {
    readonly code: DecodeErrorCode;
    readonly name = "DecodeError";
    constructor(code: DecodeErrorCode, message: string, options?: {
        cause?: unknown;
    });
}
export declare function isRecord(value: unknown): value is Record<string, unknown>;
export declare function getUtf8ByteLengthV2(value: unknown): number;
export declare function parseProtocolJsonV2(raw: unknown, maxBytes?: number): unknown;
export declare function decodeClientFrameV2(raw: unknown): ClientFrame;
export declare function decodeServerFrameV2(raw: unknown): ServerFrame;
export declare function encodeClientFrameV2(frame: ClientFrame): Uint8Array;
export declare function encodeServerFrameV2(frame: ServerFrame): Uint8Array;
export declare function encodeClientFrameTextV2(frame: ClientFrame): string;
export declare function encodeServerFrameTextV2(frame: ServerFrame): string;
export declare function validateFragmentSizeV2(fragment: unknown): number;
export declare function validateHistoryChunkSizeV2(chunk: unknown): number;
export declare function validateWindowSizeV2(events: readonly unknown[]): number;
export declare function validateEncodedSizeV2(value: unknown, maxBytes?: number): number;
export declare function parseTimelineEventV2(raw: unknown): TimelineEvent;
export declare function parseTimelinePartialV2(raw: unknown): TimelinePartial;
export declare function validateFrameSizeV2(raw: unknown, maxBytes?: number): number;
export declare const validateTimelineEventFragmentV2: typeof validateFragmentSizeV2;
export declare const validateSessionHistoryChunkV2: typeof validateHistoryChunkSizeV2;
export declare const validateTimelineWindowV2: typeof validateWindowSizeV2;
export declare const validateFrameSize: typeof validateFrameSizeV2;
export declare const validateFragmentSize: typeof validateFragmentSizeV2;
export declare const validateSessionHistoryChunkSize: typeof validateHistoryChunkSizeV2;
export declare const validateWindowSize: typeof validateWindowSizeV2;