Creating and verifying zero-knowledge proofs in solidity — Zero Knowledge Proofs enable a Prover to demonstrate knowledge of something to a Verifier without revealing that knowledge. For example, if we want to prove that we have solved a puzzle without giving away the solution, we can use Zero Knowledge Proofs. How does this relate to Smart Contracts? Imagine a Solidity smart contract called Sudoku …

The Invariant test suite we created for the security audit mentioned in this article is available on GitHub. To learn more about smart contract security and smart contract audits, visit Cyfrin.io. A list of our public audit reports can be found here. Neo taught us that there are two realities: …

Gas Golfing by Optimizing Storage — This article is a write-up of a talk presented at SmartCon #1. Gas golfing is the process of optimizing the existing functionality of a smart contract without actually changing what it does. Specifically, optimising a contract’s use of storage is where some of the biggest wins can be found. With…

Cheat Sheet — 1. Definitions // Set A contains elements 1,2 and 3 A = {1,2,3} // 2 is an element of A 2∈A // 4 is not an element of A 4∉A 2. Number Sets Naturals N = {1,2,3,4,...} Integers Z = {...,-2,-1,0,1,2,...} Rationals Q = Ratio of 2 integers. example…

The do’s and don’ts — “It’s super exciting right now. Prices will likely never be as low as they were just a few months ago. The more I analyse the trends, the more I am confident that I know where Bitcoin is going. The news consistently speaks of institutional investment, and it’s clear to me…

The Math Behind The Madness — Recently, Patrick Collins and I entered into the EthGlobal hackathon and created Tweether, an on-chain governance protocol that anyone can use to submit and vote on tweets. When we were planning the project, we split the work into two parts: The governance protocol, for which I was responsible for. And…

Does it work yet? — The 18th of September was like any other day for the first few hours. Get up, have breakfast, check Twitter… wait, why is Uniswap trending? It didn’t take long to discover the reason for the explosion in Uniswap tweets was due to the sudden announcement of Uniswap’s own token: $UNI…

Get crypto prices in a single function call — The price of a LINK token has all but doubled in the past month, moving from around a steady $4 to a whopping $8 in a very short time. This is in no small part down to the Chainlink Oracle network, which provides a platform to call any external API…

Earn interest using the Aave protocol: a JavaScript tutorial — Editor’s note: This article is provided for entertainment and educational purposes only and is not intended as financial advice. Any investment actions taken related to or referencing this article are solely your own and by continuing to read this, you implicitly agree to such terms. Prerequisite: This walkthrough assumes a…