devtooligan

// @author original POC by @z0age


library pureConsole {

    /*********************
     * string + uint256
     ********************/

    function log(string memory errorMessage, uint256 value) internal pure {

owenThurm

// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.17;

interface ICallback {
    function beforeExecution() external;
}

/** Exploit Desc: **/
// The GasGriefer is used as a `callbackContract` on a swapOrder

cwhinfrey

ChainSwap 1

• $800k
• July 2, 2021
• Vulnerability: Smart contract bug
• Note: Users reported lost funds, ChainSwap shut down all nodes and a fix was deployed within 30 minutes.
• Source: https://chain-swap.medium.com/chainswap-post-mortem-and-compensation-plan-90cad50898ab

ChainSwap 2

• $4.4M
• July 10, 2021
• Vulnerability: Smart contract bug

patrickd-

Setup

Install virtualenv

sudo apt install virtualenv

Install virtualenvwrapper

spalladino

Falsehoods that Ethereum programmers believe

I recently stumbled upon Falsehoods programmers believe about time zones, which got a good laugh out of me. It reminded me of other great lists of falsehoods, such as about names or time, and made me look for an equivalent for Ethereum. Having found none, here is my humble contribution to this set.

About Gas

Calling estimateGas will return the gas required by my transaction

Calling estimateGas will return the gas that your transaction would require if it were mined now. The current state of the chain may be very different to the state in which your tx will get mined. So when your tx i