/**
 * Incrementally decode little-endian u32 length-prefixed frames.
 *
 * Complete frames already present in an input chunk are delivered as views of
 * that chunk. Only a frame split across chunks is copied, into an accumulator
 * retained and reused for later split frames. The callback is synchronous and
 * must not retain its view after returning.
 */
export declare class LengthPrefixedFrameDecoder {
    private readonly maxFrameLength;
    private readonly onFrame;
    private pending;
    private pendingLength;
    private pendingFrameLength;
    constructor(maxFrameLength: number, onFrame: (frame: Uint8Array) => void);
    /** Returns false for an invalid or oversized frame length. */
    push(chunk: Uint8Array): boolean;
    private ensurePendingCapacity;
}
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