```typescript
import { type Buffer } from "node:node__buffer.d.ts";
```
Buffer.readBigInt64BE(offset?: number): bigint
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 = 0
Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.