stonegao

Design for a CoinSwap Implementation for Massively Improving Bitcoin Privacy and Fungibility

25/5/2020

Abstract

Imagine a future where a user Alice has bitcoins and wants to send them with maximal privacy, so she creates a special kind of transaction. For anyone looking at the blockchain her transaction appears completely normal with her coins seemingly going from address A to address B. But in reality her coins end up in address Z which is entirely unconnected to either A or B.

Now imagine another user, Carol, who isn't too bothered by privacy and sends her bitcoin using a regular wallet which exists today. But because Carol's transaction looks exactly the same as Alice's, anybody analyzing the blockchain must now deal with the possibility that Carol's transaction actually sent her coins to a totally unconnected address. So Carol's privacy is improved even though she didn't change her behaviour, and perhaps had never even heard of this software.

stonegao

import * as anchor from "@coral-xyz/anchor";
import { PublicKey, Transaction, ComputeBudgetProgram } from "@solana/web3.js";
import * as token from "@solana/spl-token";

const provider = anchor.AnchorProvider.env();
anchor.setProvider(provider);

// Assumes your running with `anchor run closeAux --provider.cluster mainnet --provider.wallet ~/.config/solana/your-key.json`
const payer = provider.wallet["payer"];

stonegao

深入理解以太坊

目标

• 理解以太坊的底层运行机制
  • 本文主要关注为什么这么做、基本原理、实现效果，2/8法则，花 20% 的精力掌握 80% 的内容
  • 细节实现会留 reference，如果想研究，建议用以下方式：1. 走一遍 demo，搞清楚所有的细节，例如 EVM 合约的执行流程；2. 自己实现一遍，比如 MPT、EVM，甚至整个以太坊客户端。
• 概览以太坊生态全景

stonegao

# 2023-11-27 MIT LICENSE

Here's the open source version of my ChatGPT game MonkeyIslandAmsterdam.com.

It's an unofficial image+text-based adventure game edition of Monkey Island in Amsterdam, my home town.

Please use it however you want. It'd be nice to see more ChatGPT-based games appear from this. If you get inspired by it, please link back to my X https://x.com/levelsio or this Gist so more people can do the same!

Send me your ChatGPT text adventure game on X, I'd love to try it!

stonegao

Using LEB128 encoding scheme for custom abi/interface.

ERC-138128: Custom function selector and calldata encoding scheme declaration standard

• A contract SHOULD use ERC-165 standard to declare its support for ERC-138128 standard.
• A contract supporting ERC-138128 MUST have these two view functions: customSelectors() and customEncodings().

customSelectors()

This function is used to declare alternative function selectors for any number of standard function signatures. This function MUST have the following interface.

stonegao

FROM node:16-alpine as builder

RUN  apk add curl bash

# install node-prune (https://github.com/tj/node-prune)
RUN curl -sfL https://gobinaries.com/tj/node-prune | bash -s -- -b /usr/local/bin

USER node

WORKDIR /home/node

stonegao

server {
    listen 80;
    client_max_body_size 4G;

    access_log /var/sites/webapp/logs/access.maintenance.log;
    error_log /var/sites/webapp/logs/error.maintenance.log info;

    server_name api.webapp.com;

    # this guy redirects any path to /api.json

stonegao

exFAT support on macOS seems to have some bugs because my external drives with exFAT formatting will randomly get corrupted.

Disk Utility is unable to repair this at first, but the fix is this:

1. Use diskutil list to find the right drive id.
2. You want the id under the IDENTIFIER column, it should look like disk1s1
3. Run sudo fsck_exfat -d <id from above>. eg sudo fsck_exfat -d disk1s3
4. -d is debug so you'll see all your files output as they're processed.
5. Answer YES if it gives you the prompt Main boot region needs to be updated. Yes/No?

stonegao

Specs

CPU

• AMD Ryzen 9 7900X AM5, 4.70 GHz, 12-Core

RAM

• Corsair 6000-40 Vengeance 2 x 32GB 6000 MHz (DDR5)

Nvme

• WD Black SN850X 4 TB M.2 2280

stonegao

// bitcoin = "*"
// bitcoin_hashes = "*"

use bitcoin::{Address, Network, Script};
use bitcoin::util::address::Payload;
use bitcoin::util::psbt::serialize::Deserialize;
use bitcoin_hashes::{hash160, Hash};

fn main() {
    let bytes: &[u8] = &[