an-ivannikov

Protonmail on Ubuntu 20.04 and Debian 10 server

#protonmail #debian #linux

Before you start

Currently protonmail bridge for linux is distributed as part of an open beta program, but soon it will be made public (https://protonmail.com/bridge/install).

Consider that the bridge linux client requires a paid protonmail account to work.

Get the protonmail bridge linux installer

an-ivannikov

pragma solidity ^0.4.18;

contract QuickSort {
    
    function sort(uint[] data) public constant returns(uint[]) {
       quickSort(data, int(0), int(data.length - 1));
       return data;
    }
    
    function quickSort(uint[] memory arr, int left, int right) internal{

an-ivannikov

const ValueswapV2Pair = artifacts.require('ValueswapV2Pair.sol');


module.exports = async (callback) => {
  console.log(
    'ValueswapV2Pair bytecode hash (Look for INIT_CODE_HASH):\n%s',
    (web3.utils.keccak256(ValueswapV2Pair.bytecode)).substring(2)
  );
  callback();
}

an-ivannikov

Overview

Geth (Go-Ethereum) as of January 2022 takes about 500 GiB of space on a fast/snap sync, and then grows by ~ 10 GiB/week. This will fill a 1TB SSD in ~6 months, to the point where space usage should be brought down again with an offline prune.

Happily, Geth 1.10.x introduces "snapshot offline prune", which brings it back down to about its original size. It takes roughly 4 hours to prune the Geth database, and this has to be done while Geth is not running.

Caveat that while several folx have used offline pruning successfully, there is risk associated with it. The two failure modes we have seen already are:

• There is 25 GiB or less of free disk space

an-ivannikov

https://abi.hashex.org/

an-ivannikov

The problem is that you first need to compile the `uniswap-v2-core` contracts

Next, you need to get `INIT_CODE_HASH` from the bytecode of the `UniswapV2Pair.sol`

```js
// file ./get-init-code-hash.js
const UniswapV2Pair = artifacts.require('UniswapV2Pair.sol');
module.exports = async (callback) => {
  console.log(
    'UniswapV2Pair bytecode hash (Look for INIT_CODE_HASH):\n%s',

an-ivannikov

> https://www.codebales.com/cannot-find-in-scope

```
Clean build folder (shift + command + k)
Close Xcode completely
Delete 'DerivedData' content (/Library/Developer/Xcode/DerivedData)
Open Xcode and your project again
Try to build and run it again
```

an-ivannikov

# VirtualBox Mac - Kernel driver not installed (rc=-1908)

> https://vc.ru/dev/287597-virtualbox-na-mac-kernel-driver-not-installed-rc-1908-proverennoe-reshenie

an-ivannikov

import * as React from 'react';
import { useLocation, useHistory } from 'react-router-dom';
import queryString from 'query-string';



export default function Component(props) {
  const history = useHistory();
  const location = useLocation();
  const initSearch = location.search;

an-ivannikov

const { createHash, createHmac } = require('crypto');



function checkTelegramAuthData({ token, hash, ...data }) {
  const secret = createHash('sha256')
    .update(token)
    .digest();

  const stringToCheck = Object.keys(data)