function readExactimport { readExact } from "https://deno.land/std@0.166.0/encoding/binary.ts"; readExact(r: Deno.Reader, b: Uint8Array)Reads the exact number of bytes from r required to fill b. Throws Deno.errors.UnexpectedEof if n bytes cannot be read. Parametersr: Deno.Readerb: Uint8Array