virattt

DanielVF

Impact

CRITICAL! Almost all USDC liquidity on the REKT/USDC uniswap pool can be stolen, due to an authorization issue with burnFrom() on the REKT token.

Background

Uniswap v2 pools get the prices for their swaps by comparing the relative amounts of each of the two tokens that they hold. If the pool holds very little of token A, and a lot of token B, then it only takes a little of token A to buy a lot of token B.

Currently REKT and USDC are fairly priced in the pool. If there were to suddenly be very little REKT in the pool, but the same amount of USDC, then very little REKT would be able to buy a lot of USDC.

miohtama

-- Get all approve() transaction
--  Web3.utils.keccak256("approve(address,uint256)").slice(0, 10);
-- '0x095ea7b3'
WITH txdata as (
    SELECT tx.hash as txid, tx.block_timestamp as block_timestamp, cast(tx.receipt_gas_used as numeric) * cast(tx.gas_price as numeric) as cost FROM
        bigquery-public-data.crypto_ethereum.transactions as tx
    where 
        tx.input 
    LIKE  "0x095ea7b3%") 
SELECT (SUM(cost) / POWER(10, 18)) as eth_cost from txdata;

buddies2705

{
  ethereum {
    smartContractCalls(options: {desc: "block.height", limit: 10}, smartContractMethod: {is: "Contract Creation"}, smartContractType: {is: Token}) {
      block {
        height
        timestamp {
          time
        }
      }
      smartContract {

rauschma

Cheat sheet: classes in JavaScript

Basic members of classes

class OtherClass {}

class MyClass1 extends OtherClass {

  publicInstanceField = 1;

harding

A description of known problems in Satoshi Nakamoto's paper, "Bitcoin: A Peer-to-Peer Electronic Cash System", as well as notes on terminology changes and how Bitcoin's implementation differs from that described in the paper.

Abstract

The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power.

rootslab

var log = console.log
    , Kombo = require( '../' )   
    , test = function ( mbytes ) {
        var mb = Math.max( mbytes, 1 )
            , b = new Buffer( mb * 1024 * 1024 )
            , stime = -1
            , etime= -1
            , i = 0
            ;

smhanov

#!/usr/bin/python3
# By Steve Hanov, 2011. Released to the public domain.
# Please see http://stevehanov.ca/blog/index.php?id=115 for the accompanying article.
#
# Based on Daciuk, Jan, et al. "Incremental construction of minimal acyclic finite-state automata." 
# Computational linguistics 26.1 (2000): 3-16.
#
# Updated 2014 to use DAWG as a mapping; see 
# Kowaltowski, T.; CL. Lucchesi (1993), "Applications of finite automata representing large vocabularies", 
# Software-Practice and Experience 1993

labnol

Learning Google Apps Script

Find the best resources for learning Google Apps Script, the glue that connects all GSuite services including Gmail, Google Drive, Calendar, Google Sheets, Forms, Maps, Analytics and more.

A good place to learn more about Google Apps Script is the official documentation available at developers.google.com. Here are other Apps Script resources that will help you get up to speed.

1. Google Apps Script Code Samples by Amit Agarwal
2. Google Apps Script Development - Create Google Apps Script projects locally inside VS Code - video tutorial
3. Awesome Google Scripts by Amit Agarwal
4. Google Developer Experts - Follow Apps Scr

wavded

"use strict"
var Promise = function () {
  this.state = 'pending'
  this.thenables = []
}

Promise.prototype.resolve = function (value) {
  if (this.state != 'pending') return

  this.state = 'fulfilled'