huffswap AMM •

A Huff implementation of UniswapV1.

Why Uniswap V1 and not V2?

This is a proof of concept for a hackathon; because we only have a limited amount of time, we chose to reimplement V1 because it is simpler than V2.

Security concerns

To make it comparable to uniswap V1 i have to avoid using a Reentrancy guard this is just a POC of a minimal AMM with low gas consumptions build for the ETH Denver hackaton. DO NOT USE IT IN PRODUCTION.

Gas Savings

method	Uniswap	Huffswap	delta	percent cheaper
createExchange	227994	106858	121136	53,13%
addLiquidity	99367	91304	8063	8,11%
removeLiquidity	18150	14286	3864	21,29%
swapEthToken	16250	12953	3297	20,29%
swapTokenEth	16999	13595	3404	20,02%
swapTokenToToken	28406	20098	8308	29,25%

Lets make a gas budget, lets imagine 1 create pair, 5 add liquidity, 5 remove liquidity and 30 swaps (per each type of swap);

• Uniswap: 1432129
• Huffswap: 1101268

Gas savings, around 30%

Huffswap frontend

The Huffswap frontend is a fork of Uniswap frontend, you could find it in: https://github.com/nicobevilacqua/huffswap-frontend

Deployment

Huffswap has been deployed so far on

• Mantle
• Scroll
• Neon EVM
• Filecoin EVM
• Polygon

Mantle

Factory: 0xD9D26e61D8F02AF7e1Dd8A72313770E6B00EAabB exchange: 0x8d867eC6107763cbfcCc71a98Cf3689E73d49C74

Deployed via created2 using this contract: https://explorer.testnet.mantle.xyz/address/0xC26ab96b8d2Ad4E2e7e097025308Fe06d82255A1

Scroll

Factory: 0x420fAd7011A85cc6C308941A7245b7c0E695Fe85
Exchange: 0x7a479AAe93f97F00117571ee1e61bacaB2C780A1

NEON EVM

factory: 0xfF6AE961405b4f3e3169e6640Cd1cA3083D58a7b
exchange: 0x2Ca416EA2F4bb26ff448823EB38e533b60875C81

Filecoin EVM

factory: address 0xacBC672c3612b4417588f98e783f30694b8f83Cb
exchange: 0x77bA1c193661EeF8653C69F8f7f825DF47614518

Polygon

factory: address 0x420fAd7011A85cc6C308941A7245b7c0E695Fe85
exchange: 0x7a479AAe93f97F00117571ee1e61bacaB2C780A1

Getting Started

Requirements

The following will need to be installed in order to use this template. Please follow the links and instructions.

• Git
  • You'll know you've done it right if you can run git --version
• Foundry / Foundryup
  • This will install forge, cast, and anvil
  • You can test you've installed them right by running forge --version and get an output like: forge 0.2.0 (92f8951 2022-08-06T00:09:32.96582Z)
  • To get the latest of each, just run foundryup
• Huff Compiler
  • You'll know you've done it right if you can run huffc --version and get an output like: huffc 0.3.0

Quickstart

1. Clone this repo or use template

Click "Use this template" on GitHub to create a new repository with this repo as the initial state.

Or run:

git clone https://github.com/huff-language/huff-project-template
cd huff-project-template

2. Install dependencies

Once you've cloned and entered into your repository, you need to install the necessary dependencies. In order to do so, simply run:

forge install

3. Build & Test

To build and test your contracts, you can run:

forge build
forge test

For more information on how to use Foundry, check out the Foundry Github Repository and the foundry-huff library repository.

Blueprint

scripts
├─ Deploy.s.sol — Deployment Script
src
├─ Exchange — LP token implementation
├─ Factory  — Factory of LP Tokens

License

The Unlicense

Acknowledgements

• forge-template
• femplate
• huffmate

Disclaimer

These smart contracts are being provided as is. No guarantee, representation or warranty is being made, express or implied, as to the safety or correctness of the user interface or the smart contracts. They have not been audited and as such there can be no assurance they will work as intended, and users may experience delays, failures, errors, omissions, loss of transmitted information or loss of funds. The creators are not liable for any of the foregoing. Users should proceed with caution and use at their own risk.