Aisland Crosschain Dex (Decentralised Exchange)

This package is a Crosschain DEX that is supporting natively 8 different blockchains:

• Ethereum
• Polygon
• Binance Smart Chain
• Optimism
• Fantom
• Celo
• Avalanche
• Arbitrum

official Results

You can use the on-line version clicking here:
https://dex.aisland.io

With > 4000 tokens listed.

Under the hood, it uses the great 0x protocol
and the list of tradable tokens is filtered out from https://tokenlists.org/ (an Uniswap Project).

You can easily make your own DEX with a minimal effort, just changing the logo and colors in a few html/css files inside the html folder.

Installation Requirements:

Operating System:

• Debian/Ubuntu Linux Operating System
  (it work in any Linux OS with small changes to the installation steps)

Packages to be installed:

• Nodejs v.20.x.
• Mariadb Server.
• Nginx used as reverse proxy for https connections.
• Git
• Curl

Hardware Requirements:
4 GB RAM, 10 GB disk for the OS and couple of CPU.
A virtual machine from any cloud provider will work perfectly.

Installation Debian/Ubuntu:

Install Mariadb, Git, Curl and Nginx:

apt-get -y install mariadb-server git nginx curl

The version in the package of the OS is quite old so following the instructions from the official website: https://nodejs.org to install the version >= 20.x.

From command line, clone this repository in the folder /usr/src/:

 cd /usr/src/  
 git clone https://github.com/aisland-dao/dex/  

Install the required packages using npm:

npm install  

Create a database with:

mysql   
create database dex;  

create the database tables with:

mysql dex <dump.sql  

• customise all the files .sh
• configure the Nginx reverse proxy to reach port tcp/3000

Run

Execute:

/usr/src/dex-server.sh

to let it work in background, use systemctl

Tokens Update

There is an utility to load/update the tokens list reading the data from https://tokenlists.org/. You should configure the database parameters editing the text file:

dex-load-coingecko-tokens.sh  

and launch it from the standard folder:

/usr/src/dex/dex-load-main-tokens-coingecko.sh

You should run automatically the app one time a week from crontab. You can add the automatic job with:

crontab -e

and add the following line:

15 0 * * 0 /usr/src/dex/dex-load-main-tokens-coingecko.sh >>/tmp/dex-load-main-tokens-coingecko.log

It will be executed every Sunday at 15 minutes past Midnight

Tokens Ranking

There is an utility to update the ranking from coingecko api. You should configure the database parameters editing the text file:

dex-update-tokens-ranking-coingecko.sh

and launch it from the standard folder:

/usr/src/dex/dex-update-tokens-ranking-coingecko.sh

You should run automatically the app one time a week from crontab. You can add the automatic job with:

crontab -e

and add the following line:

0 0 * * 0 /usr/src/dex/dex-update-tokens-ranking-coingecko.sh >>/tmp/dex-update-tokens-ranking-coingecko.log

It will be executed every Sunday at Midnight.

Protocol Fees

You can customise the protocol fees and address to receive them, changing the following variable values in "dex-server.sh":

export WALLET='0xbec1Ed0dFc75955486977cc843293fe03ecA657D'
export FEES=0.001

You can leave our wallet if you wish to contribute to our efforts or place yours. 0.001 = 0.1% of fees, 1 = 100%.

Code Changes

Remember to execute:

cd /usr/src/dex/react/
./build.sh
to update the bundle.js

if you change dex.js, since it's bundled together with some open source libraries.

Contribution

• Code contribution are welcome, please feel free to make a pull request.
• You give a good financial help to make more features, using our public app https://dex.aisland.io, the protocol will forward us 0.01% on the transaction value.