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Buffer.writeBigUInt64BE - buffer - Node documentation
method Buffer.writeBigUInt64BE

Usage in Deno

import { type Buffer } from "node:buffer";
Buffer.writeBigUInt64BE(
value: bigint,
offset?: number,
): number

Writes value to buf at the specified offset as big-endian.

This function is also available under the writeBigUint64BE alias.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigUInt64BE(0xdecafafecacefaden, 0);

console.log(buf);
// Prints: <Buffer de ca fa fe ca ce fa de>

Parameters

value: bigint

Number to be written to buf.

optional
offset: number = 0

Number of bytes to skip before starting to write. Must satisfy: 0 <= offset <= buf.length - 8.

Return Type

number

offset plus the number of bytes written.