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method Buffer.prototype.readBigInt64BE
import { Buffer } from "https://deno.land/std@0.177.0/node/buffer.ts";

Reads a signed, big-endian 64-bit integer from buf at the specified offset.

Integers read from a Buffer are interpreted as two's complement signed values.

Parameters

optional
offset: number

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

Returns

bigint