0x-launch-kit-frontend

⚠️ Deprecation Warning ️️⚠️

This project is no longer being actively maintained. To fork or run a Standard Relayer API instance, you can use the 0x API instead.

This is an example implementation of a dApp that interacts with a 0x relayer. To use it, you need to have the URL of an existing relayer, or you can start one locally for use during development.

This version of Launch Kit supports 0x v3. If you're looking for v2 it is available on this branch.

This repo ships with both an ERC-20 token trading interface and an ERC-721 marketplace interface.

ERC-20	ERC-721

Usage

Clone this repository and install its dependencies:

git clone [email protected]:0xProject/0x-launch-kit-frontend.git
cd 0x-launch-kit-frontend
yarn

Using an existing relayer

If you have the URL of an existing relayer, you can use this frontend against it. After installing the dependencies, start the application with this command, replacing RELAYER_URL and RELAYER_WS_URL with the proper value:

REACT_APP_RELAYER_URL='https://RELAYER_URL/' REACT_APP_RELAYER_WS_URL='wss://RELAYER_URL/' yarn start

A browser tab will open in the http://localhost:3001 address. You'll need to connect MetaMask to the network used by the relayer.

You can optionally pass in any relayer endpoint that complies with the 0x Standard Relayer API. For example, if you want to show liquidity from 0x API:

REACT_APP_RELAYER_URL='https://api.0x.org/sra/v3' REACT_APP_RELAYER_WS_URL='wss://api.0x.org/sra/v3' REACT_APP_NETWORK_ID=1 REACT_APP_CHAIN_ID=1 yarn start

Creating a relayer for development

If you don't have a relayer, you can start one locally for development by running 0x-api directly, or by using docker-compose.
For docker-compose, first create a docker-compose.yml file like this:

version: '3'
services:
    ganache:
        image: 0xorg/ganache-cli
        ports:
            - '8545:8545'
    postgres:
        image: postgres:9.6
        environment:
            - POSTGRES_USER=api
            - POSTGRES_PASSWORD=api
            - POSTGRES_DB=api
        ports:
            - '5432:5432'
    backend:
        image: 0xorg/0x-api:latest
        depends_on:
            - postgres
            - mesh
        environment:
            CHAIN_ID: '1337'
            WHITELIST_ALL_TOKENS: 'true'
            FEE_RECIPIENT: '0x0000000000000000000000000000000000000001'
            MAKER_FEE_UNIT_AMOUNT: '0'
            TAKER_FEE_UNIT_AMOUNT: '0'
            MESH_WEBSOCKET_URI: 'ws://mesh:60557'
            MESH_HTTP_URI: 'http://mesh:60556'
            POSTGRES_URI: 'postgresql://api:api@postgres/api'
            ETHEREUM_RPC_URL: 'http://ganache:8545'
        ports:
            - '3000:3000'
    mesh:
        image: 0xorg/mesh:9.0.1
        depends_on:
            - ganache
        environment:
            ETHEREUM_RPC_URL: 'http://ganache:8545'
            ETHEREUM_CHAIN_ID: 1337
            VERBOSITY: 3
            WS_RPC_ADDR: '0.0.0.0:60557'
            HTTP_RPC_ADDR: '0.0.0.0:60556'
            # You can decrease the BLOCK_POLLING_INTERVAL for test networks to
            # improve performance. See https://0x-org.gitbook.io/mesh/ for more
            # Documentation about Mesh and its environment variables.
            BLOCK_POLLING_INTERVAL: '5s'
        ports:
            - '60556:60556'
            - '60557:60557'
            - '60558:60558'
            - '60559:60559'

and then run docker-compose up. This will create four containers: one is a Postgres database, one has a ganache with the 0x contracts deployed and some test tokens, another one has an instance of 0x-api implementation of a relayer that connects to that ganache and finally a container for 0x-mesh for order sharing and discovery on a p2p network.

After starting those containers, you can run the following in another terminal. A browser tab will open in the http://localhost:3001 address. You'll need to connect MetaMask to localhost:8545.

REACT_APP_RELAYER_URL='http://localhost:3000/sra/v3' REACT_APP_RELAYER_WS_URL='ws://localhost:3000/sra/v3' yarn start

Note: the state of the relayer will be kept between runs. If you want to start from scratch, use docker-compose up --force-recreate

Environment variables

You can create a .env file to set environment variables and configure the behavior of the dApp. Start by copying the example file (cp .env.example .env) and modify the ones you want. Some things you can configure are:

REACT_APP_RELAYER_URL: The URL of the relayer used by the dApp. Defaults to http://localhost:3000/v3
REACT_APP_RELAYER_WS_URL: The Websocket URL of the relayer used by the dApp. Defaults to http://localhost:3000/
REACT_APP_FEE_PERCENTAGE: The fee percentage amount charged on 0x orders filled via the Forwarder. Note this is limited to */WETH orders for the taker.
REACT_APP_FEE_RECIPIENT: The address which receives the fees from the Forwarder.
REACT_APP_NETWORK_ID: The network id to build the front end for. E.g 42 for Kovan, 50 for Ganache
REACT_APP_CHAIN_ID: The chain id to build the front end for. E.g 42 for Kovan, 1337 for Ganache
REACT_APP_DEFAULT_ORDER_EXPIRY_SECONDS: The expiration time for an order. Defaults to 1 day.