This repository provides a basic scaffold for building a Decentralized Exchange (DEX) on the Ethereum blockchain. Follow the guides to learn how to:
- Setup an open source, fully modifyable decentralized exchange on your local server
- Send Ethereum transactions
- Make changes to the front-end UI
- Customize all parts of a DeFi application: change fees, parameters, adding markets, etc.
It should take less than 10 minutes to get your DEX running.
Launching the Scaffold App
The easiest way to launch the scaffold dex is via
If you don't already have them installed, you can follow this link to install them (free).
Clone this repo
git clone https://github.com/hydroprotocol/hydro-scaffold-dex.git
Change your working directory
Build and launch your hydro relayer
docker-compose pull && docker-compose up -d
This step may takes a few minutes. When complete, it will start all necessary services.
Note: It will use ports
8545on your computer. Please make sure these ports are available.
Check out your relayer
Open http://localhost:3000/ on your browser to see your exchange in action!
Testdrive Your DEX
Now that your DEX is up on your local server, let's try it out a bit.
Connect a wallet
You can connect to a wallet by clicking the button at right-top corner. The demo is running a localhost ethereum instance, with a pre-configured wallet address:
You can find it under the
Browser Wallettype. The address is:
- public key:
- private key:
Test out the trading flow
You might have noticed that we setup a simple market making bot on the HOT-DAI market. Try to make some trades on this active market.
Configuring Your DEX
Our Hydro Scaffolds come with a powerful API and easy Command Line Interface (CLI) for configuring your DEX.
Login to the CLI
docker-compose exec admin sh
View the CLI manual to see a list of functions you can perform
See admin cli manual
Try creating a new market
hydro-dex-ctl market new HOT-WWW \ --baseTokenAddress=0x4c4fa7e8ea4cfcfc93deae2c0cff142a1dd3a218 \ --quoteTokenAddress=0xbc3524faa62d0763818636d5e400f112279d6cc0
The base token is the first symbol (HOT above), the quote token is the second symbol (WWW above).
You could try this with different token symbols and contract addresses.
This creates a market with "default parameters" for fees, decimals, etc.
hydro-dex-ctl market publish HOT-WWW
This makes the market viewable on the frontend
Exit the CLI
This will exit out of the CLI and go back to the original terminal.
You now have a fully functioning DEX on your local system, complete with a CLI for easy customization.
Please open an Github Issue for questions, requests, or bugs.
Deploying your DEX
Check out our Developer Documentation.
Useful Docker Commands
Display the status of all services running
This command displays the status of all services running in docker. It's helpful for troubleshooting and for understanding the combination of components that goes into running your DEX.
Stopping your DEX
This command will stop all of the current services running in docker.
Restarting your DEX
docker-compose pull && docker-compose up -d
The same command that you ran to start it the first time can be used for subsequent restarts. Always run the pull command first, as the docker-compose up command will not run without an image.
# view logs of the service that defined in docker-compose.yml services # e.g. view watcher log docker-compose logs --tail=20 -f watcher # e.g. view api log docker-compose logs --tail=20 -f api
Much like the status, viewing the logs can give you an idea of the specific details involved in each service.
Update this repo
git pull origin master
Completely clean the old state (data will be deleted)
docker-compose down -v
What all comes in this Scaffold?
- A Basic Exchange Web UI
- A modular Ethereum Wallet interface
- API Server
- Websocket Server to handle keepalive connections and serve realtime data
- Matching Engine to send matching orders to the hydro smart contracts on Ethereum
- Monitoring processes to watch for transaction changes on the blockchain
- Examples of market making bots, including a Uniswap-like constant price AMM
- PostgresSQL database
- ganache-cli to run a local ethereum node and support for ropsten and mainnet
How to setup environment for local development
See setup dev env manual.
This project is licensed under the Apache 2.0 License - see the LICENSE file for details