export declare class BufferWriter {
    private buffer;
    private offset;
    constructor(initialLength: number);
    writeUint8(value: number): void;
    writeBoolean(bool: boolean): void;
    writeBytes(bytes: Uint8Array): void;
    getBuffer(): Uint8Array;
    getWrittenLength(): number;
    private ensureCapacity;
    private expandBuffer;
    writeUVarint(x: number): void;
    writeVarint(x: number): void;
    writeLengthPrefixedString(value: string, varint?: boolean, negativeLength?: boolean): void;
}
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