mohamedhayibor

// Based on https://github.com/ethereum/EIPs/blob/master/assets/eip-712/Example.js

const ethers = require('ethers');

function abiRawEncode(encTypes, encValues) {
  const hexStr = ethers.utils.defaultAbiCoder.encode(encTypes, encValues);
  return Buffer.from(hexStr.slice(2, hexStr.length), 'hex');
}

function keccak256(arg) {

mohamedhayibor

Notes on Governance Minimization

The most widely used protocols will trend towards governance minimization.

1. Coz that allows stakeholders (ie programmers...) to depend on a protocol.
2. That creates a virtuous cycle of adoption allowing otherwise unachievable scale.
3. Allows to set standards everyone depends on, leads to a synergy greater than the sum of its parts.

Yet Governance is important

mohamedhayibor

Notes on Credible Neutrality

Mechanism is an algorithm plus incentives.

A mechanism is a tool that takes inputs from multiple people and uses these inputs as a way to determine things about its participants' values, so as to make some kind of decision people care about.

In a well functioning mechanism, the decision made is both efficient (the best possible outcome given the participant's preferences, and incentive-compatible, meaning that people have the incentive to participate "honestly". Private property is as effective as it is: not because it is a god given right, but because it's credibly neutral mechanism that solves a lot of problems in society, far from all but still a lot.

It's easier to agree that a neutral mechanism treats everyone reasonably fairly than it is to convince a diverse group of people that some particular blacklist of unallowed political viewpoints is correct.

mohamedhayibor

Profitable

Our empirical results show that an adversary can achieve an average daily revenue of 3,414 USD.

Double edge sword

However, AMM DEXs also exacerbate malpractices by quoting asset prices in a fully deterministic way, providing relative certainty over the expected price impact of a trade. This enables a frontrunning adversary to perform attacks with predictable outcomes.

The fundamental intuition is that the delay in the time taken for a transaction to execute allows an adversary to profit by exploiting the knowledge of the direction of a price change. The attacks are called sandwich attacks because a victim transaction is sandwiched between adversarial transactions.

mohamedhayibor

1. Re-create contractless contracts using zksync create2

mohamedhayibor

The best:

• Sapiens: A Brief History of Humankind - one of the most interesting books I have ever read
• Superforecasting: The Art and Science of Prediction - absolutely fascinating. actionable advice that has been unreasonably well tested and proven.
• The Better Angels of Our Nature - another one for the list of most interesting books ever
• Feeling Good: The New Mood Therapy - highly recommended for anyone who struggles with depression. takes a very data-centric approach to correcting your own warped perceptions of reality. made a world of difference for me.
• A Small Matter of Programming: Perspectives on End User Computing - incredibly useful, espec

mohamedhayibor

const cbor = require('cbor')

const bytecode = '70656e6420696e707574206e6f7465415a54454320617272617920696e646578206973206f7574206f6620626f756e6473a265627a7a7231582011639b922cf661bed862dc70ef7a0a62211ae58261383916450efb20b2fd6a4164736f6c63430005100032'

// last two bytes are 0032, interpreted in hex is 50, so length in hex is 100
// the metadata bytes are the last 100 chars, excluding the last 4 which are the size
const metadata = bytecode.slice(bytecode.length - 104, bytecode.length - 4)

const { solc } = cbor.decode(metadata)

mohamedhayibor

Hold ctrl + option + shift

mohamedhayibor

pragma solidity ^0.4.26;

library CheckOverflows {
    function add(uint256 n1, uint256 n2) internal pure returns(uint256 n3) {
        n3 = n1 + n2;
        require(n3 >= n1);
        return n3;
    }

    function sub(uint256 n1, uint256 n2) internal pure returns(uint256) {

mohamedhayibor

Temp notes