https://jeiwan.net/tags/defi/ Recent content in DeFi on Going the distance Hugo -- gohugo.io en Sun, 24 Apr 2022 00:00:00 +0000 https://jeiwan.net/posts/programming-defi-uniswapv2-4/ Sun, 24 Apr 2022 00:00:00 +0000 https://jeiwan.net/posts/programming-defi-uniswapv2-4/ Photo by British Library on Unsplash Introduction Welcome to the final part of this series! Yes, we’ve almost done implementing a Uniswap V2 clone from scratch, and today we’re going to fill missing gaps. There’s a lot of things to do, so let’s get straight to business. You can find full source code of this part here: source code, part 4. LP-tokens burning bug We’ll begin with finishing the Router contract. https://jeiwan.net/posts/evaluating-defi-strategy-in-foundry/ Mon, 11 Apr 2022 00:00:00 +0000 https://jeiwan.net/posts/evaluating-defi-strategy-in-foundry/ Photo by Brett Jordan on Unsplash Introduction Nowadays, the ecosystem of Ethereum is quite rich and complex. There are multitudes of DeFi applications: decentralized exchanges, staking protocols, money markets, yield farming vaults, derivatives, leverages, etc. As DeFi protocol evolve, they become more and more intertwined, allowing for new complex strategies. In this article, I’ll show you how to program a custom DeFi strategy that interacts with several DeFi platforms to produce a leveraged position that earns passive income. https://jeiwan.net/posts/programming-defi-uniswapv2-3/ Tue, 15 Mar 2022 00:00:00 +0000 https://jeiwan.net/posts/programming-defi-uniswapv2-3/ Photo by C Dustin on Unsplash Introduction Another month, another blog post! 🙈 So far, our UniswapV2 implementation had the most crucial part done–the pair contract. We haven’t yet implemented protocol fees (the fee Uniswap takes from each liquidity deposit) but we’ll do this a little bit later since this is not a critical part of the exchange. Today, we’ll move forward and implement the factory contract, which serves as a registry of all deployed pair contracts. https://jeiwan.net/posts/programming-defi-uniswapv2-2/ Mon, 31 Jan 2022 00:00:00 +0000 https://jeiwan.net/posts/programming-defi-uniswapv2-2/ Photo by Jon Cellier on Unsplash Introduction Welcome back! Today we’ll add the core functionality to our clone of Uniswap V2–swapping. Decentralized tokens exchanging is what Uniswap was created for, and today we’ll see how it’s done. We’re still working on the core pair contract, which means that our implementation will be very low-level and minimal. There’s no convenient interface and we won’t even have price calculation at this point! https://jeiwan.net/posts/programming-defi-uniswapv2-1/ Tue, 11 Jan 2022 00:00:00 +0000 https://jeiwan.net/posts/programming-defi-uniswapv2-1/ Photo by Evangelos Mpikakis on Unsplash Introduction Uniswap is a decentralized exchange running on the Ethereum blockchain. It’s fully automated, not managed, and decentralized. It has come through multiple iterations of development: first version was launched in November 2018; second version–in May 2020; and final, third, version was launched in March 2021. In my previous series on Uniswap V1, I showed how to build it from scratch and explained its core mechanics. https://jeiwan.net/posts/analysis-titan-fall/ Sun, 20 Jun 2021 18:29:26 +0700 https://jeiwan.net/posts/analysis-titan-fall/ Photo by Sigmund on Unsplash Updated on June 21: Added low ECR as another cause of the incident. Added a reference to Frax Finance. Added an explanation of arbitraging. Fixed a bug in arbitraging profits calculations, which caused lower values. Updated on June 22: Added ‘The full picture’ section. The analysis is now complete. Introduction This is an analysis of an incident that happened to Iron.