Decentralized Exchange to Swap ERC20 tokens for ETH using Automated Market Makers. Deposit / Withdraw Liquidity.
This is a PoC decentralized exchange (like uniswap) that serves to exchange ERC20 tokes for eth. Currently version is working with a single token (injected in the constructor at deploying time). This project have the purpose of learning how about how DApps work. By building this project I learned:
- How to code a ERC20 Token
- How to sent ERC20 tokens
- How Liquidity Pools Work
- How Automated Market Makers work
- How to use payable functions
- How to interact with metamask
- How to interact with Smart Contracts from a webapp
- How to deploy contracts to a public testnet
It is structured in two main folders: UI and Contracts.
The UI folder has a frontend project vite + tailwind and the web3 library is implemented twice: one implementation using ether.js and the other one using web3.js.
On the other side the Contracts folder contain a truffle project with the Token.sol and Dex.sol contracts.
Make sure you have truffle installed.
You will need a Infura key if you want to order to deploy the contracts, but if you want to run a local blockchain (e.g ganache) you only have to make sure your the port it is running is the same as in the truffle-config.js (e.g port: 7545).
Deploy the Contracts
npm install
truflle compile
truflle deploy --network developmentAfter deploying the contracts your deployer address will have a ton of ERC20 tokens that were minted at deploying stage.
Run the frontend DApp
go to the UI folder and follow the README instructions.
NOTE: You have to put the deployed addresses in the following file:
/ui/packages/dapp-final/src/config/ping-contract.js