jun-lsh

#!/usr/bin/env python3
import argparse
import concurrent.futures
import functools
import hashlib
import math
import os
import re
import struct
import subprocess

jun-lsh

"""2bird2can — voyage: wind-pump + leapfrog relay in one process.

The loop (the original strategy, just with correct boat-id tracking):
  1. spawn a boat; let it ride the leaked wind until it gets STUCK
  2. spawn a NEW boat (BOTH alive now -> the new one anchors to the old frontier,
     spawning ~10u away via GetSpawnPositionForJoin)
  3. after a short delay (--handoff-ms), during which we LEARN the new boat's id,
     kill the old boat (so the new one becomes the oldest and the NEXT spawn
     anchors to it -> the frontier walks forward)
  4. the new boat is now the frontier; let it ride until it stucks; repeat

jun-lsh

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#include <stdint.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sys/ioctl.h>

jun-lsh

What Exactly Are TEEs?

Before we can discuss the application of TEEs for blockchain related programs, we first have to establish what Trusted Execution Environments (TEEs) are.

At a high level, TEEs can be described as an isolated processing environment found on the CPU, a sort of separate secure area where whatever code and data enters remains confidential, where processes outside of a TEE cannot read or tamper with the data within it. These private regions of memory are known as enclaves.

By running code in this isolated, tamper-resistant processing environment, it "guarantees the authenticity of the executed code", where remote attestation can be provided to prove its trustworthiness to a third-party and untrusted code should not be able to interfere with the execution of a program within the TEE.

Ref: "Trusted Execution Environment: What It is, and What It is Not", Sabt et al.

Remote Attestation

jun-lsh

#include <Windows.h>
#include <ExDisp.h>
#include <atlbase.h>
#include <Shlwapi.h>
#include <atlalloc.h>
#include <ShlObj.h>
#include <cmath>
#include <vector>
#include <algorithm>
#include <string>