export declare class StreamWriter {
    private _buffer;
    private concat;
    private append;
    private view;
    writeBytes(value: Uint8Array): this;
    writeBuffer(value: Uint8Array): this;
    writeBool(value: boolean): this;
    writeUint8(value: number): this;
    writeInt32LE(value: number): this;
    writeUint32LE(value: number): this;
    writeInt64LE(value: bigint): this;
    writeUint64LE(value: bigint): this;
    writeInt128(value: string | Uint8Array): this;
    writeInt256(value: string | Uint8Array): this;
    get buffer(): Uint8Array;
}