export declare class Writer {
    buffer: Uint8Array;
    offset: number;
    constructor(size?: number);
    ensureCapacity(size: number): void;
    append_uint8(value: number): void;
    append_uint16(value: number): void;
    append_uint32(value: number): void;
    append_uint64(value: number): void;
    append_int8(value: number): void;
    append_int16(value: number): void;
    append_int32(value: number): void;
    append_int64(value: bigint): void;
    append(value: number | string | any[]): void;
}
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