code: function readAppInfo(buf) {
    // First byte varies across installs, only the 2nd and 3rd seem consistent
    if (buf.readUInt8(1) != 0x44 || buf.readUInt8(2) != 0x56)
      throw new Error('Invalid file signature')
  
    return readAppEntries(buf.slice(8))
  }
docs: Read header and app entries from binary VDF Buffer