buffer.Buffer.writeBigInt64BE

writeBigInt64BE(

value: bigint,

offset?: number

): number;

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

value is interpreted and written as a two's complement signed integer.

import { Buffer } from 'node:buffer';

const buf = Buffer.allocUnsafe(8);

buf.writeBigInt64BE(0x0102030405060708n, 0);

console.log(buf);
// Prints: <Buffer 01 02 03 04 05 06 07 08>

@param value

Number to be written to buf.

@param offset

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

@returns

offset plus the number of bytes written.