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OpenDAX Trading Platform

OpenDAX

OpenDAX is an open-source cloud-native multi-service platform for building a Blockchain/FinTech exchange of digital assets, cryptocurrency and security tokens.

Getting started with OpenDAX

1. Get a VM

Minimum VM requirements for OpenDAX:

• 8GB of RAM (12GB recommended)
• 4 cores vCPU (6 cores recommended)
• 300GB disk space (SSD recommended)

A VM from any cloud provider like DigitalOcean, Vultr, GCP, AWS as well as any dedicated server with Ubuntu, Debian or Centos would work

2. Prepare the VM

2.1 Create Unix user

SSH using root user, then create new user for the application

useradd -g users -s `which bash` -m app

2.2 Install Docker and docker compose

We highly recommend using docker and compose from docker.com install guide instead of the system provided package, which would most likely be deprecated.

Docker follow instruction here: docker Docker compose follow steps: docker compose

2.3 Install ruby in user app

2.3.1 Change user using

su - app

2.3.2 Clone OpenDAX

git clone https://github.com/openware/opendax.git

2.3.3 Install RVM

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
curl -sSL https://get.rvm.io | bash -s stable
cd opendax
rvm install .

3. Bundle install dependencies

bundle install
rake -T # To see if ruby and lib works

Using rake -T you can see all available commands, and can create new ones in lib/tasks

4. Run everything

4.1 Configure your domain

If using a VM you can point your domain name to the VM ip address before this stage. Recommended if you enabled SSL, for local development edit the /etc/hosts

Insert in file /etc/hosts

0.0.0.0 www.app.local

4.2 Bring everything up

rake service:all

You can login on www.app.local with the following default users from seeds.yaml

Seeded users:
Email: admin@barong.io, password: 0lDHd9ufs9t@
Email: john@barong.io, password: Am8icnzEI3d!

[Optional] KYCAID

In order to accelerate customer interaction, reduce risks and simplify business processes you can use KYC Verification Service from KYCaid. KYC goal is to prevent fraud and to decline users that don’t fulfill certain standards of credibility. To learn more about KYCaid and pricing you can visit their website - kycaid.com

How to configure KYCAID on the platform?

KYCAID is already integrated into our stack, to use it you'd need to create an account on kycaid.com, and set up authentification creds there and the callback url: https://example.com/api/v2/barong/public/kyc

After that all you have to do is to change several lines in config/app.yml:

kyc:
  provider: kycaid
  authorization_token: changeme             # your production API token from the 'Settings' section of kycaid.com
  sandbox_mode: true                        # 'true' for test environments - documents will be verified/rejected automatically, without payment for verification
  api_endpoint: https://api.kycaid.com/

Additional settings for KYCAID

• Be sure to check BARONG_REQUIRED_DOCS_EXPIRE ENV value inside config/barong.env to be false if you want to include address verification in your KYC process. You can set it to true if you need the document check only.
• Check if you have the correct list of document_types in the config/barong/barong.yml file:
  • Passport
  • Identity card
  • Driver license
  • Address
• Frontend KYC steps can be configured in templates/config/frontend/env.js.erb via the kycSteps field
• Tower KYC labels can be configured in templates/config/frontend/tower.js.erb via the labelSwitcher field

Usage

Initial configuration

All the OpenDAX deployment files have their confguration stored in config/app.yml.

app.yml

The following table lists the configurable parameters of the config/app.yml configuration file and its default values.

utils.yml

The following table lists configurable parameters of the config/utils.yml file:

Once you're done with the configuration, render the files using rake render:config. You can easily apply your changes at any time by running this command.

Note: be sure to append all the subdomains based on app.domain to your
/etc/hosts file if you're running OpenDax locally

Bringing up the stack

The OpenDAX stack can be brought up using two ways:

1. Bootstrap all the components at once using rake service:all[start]
2. Start every component one-by-one using rake service:*component*[start]

The components included in the stack are:

• proxy - Traefik, a robust cloud-native edge router/reverse proxy written in Go
• backend - Vault, MySQL, Redis and RabbitMQ grouped together
• cryptonodes - cryptocurrency nodes such as parity [Optional]
• daemons - Peatio and Ranger daemons [Optional]
• setup - setup hooks for Peatio and Barong to run before the application starts (DB migration etc.)
• app - Peatio is the crypto exchange software, Barong and the Ambassador API gateway
• frontend - the frontend application located at vendor/frontend
• tower - the Tower admin panel application located at vendor/tower
• monitoring - cAdvisor and Node Exporter monitoring tools [Optional]

For example, to start the backend services, you'll simply need to run rake service:backend[start]

Note: all the components marked as [Optional] need to be installed using
rake service:*component*[start] explicitly

Go ahead and try your own OpenDAX exchange deployment!

Stopping and restarting components

Any component from the stack can be easily stopped or restarted using rake service:*component*[stop] and rake service:*component*[restart].

For example, rake service:frontend[stop] would stop the frontend application container and rake service:proxy[restart] would completely restart the reverse proxy container.

Managing component deployments

Each component has a config file (ex. config/frontend/tower.js) and a compose file (ex. compose/frontend.yaml).

All config files are mounted into respective component container, except from config/app.yml - this file contains all the neccessary configuration of opendax deployment

Compose files contain component images, environment configuration etc.

These files get rendered from their respective templates that are located under templates directory.

How to update component image?

Modify config/app.yml with correct image and run rake service:all This will rerender all the files from templates directory and restart all the running services.

Alternitavely you can update the following files:

• config/app.yml
• templates/compose/*component*.yml
• compose/*component*.yml And run rake service:component[start]

How to update component config?

Modify config/*component*/*config* and run rake service:component[start], if you want the changes to be persistent, you also need to update templates/config/*components*/*config*

Render compose file

# Delete all generated files
git clean -fdx

# Re-generate config from config/app.yml values
rake render:config

# Restart the container you need to reload config
docker-compose up frontend -Vd

Clone the vendors and start

source ./bin/set-env.sh
rake vendor:clone
docker-compose -f compose/vendor.yaml up -d

Vault management

Opendax uses Vault Policies to restrict components' access to sensitive data. Each component has its own Vault token which allows granular access only to the data required.

OpenDAX has 2 rake tasks for Vault management:

rake vault:setup # Initial Vault configuration (root token generation, unseal, endpoints configuration)
rake vault:load_policies # Components' Vault token generation

Troubleshooting

Vault is sealed

In case of such error:

1. Run rake vault:setup
2. Restart the component

Make sure you're not using an existing Docker volume for Vault(i.e. one left after a different Vault container deployment):

docker volume ls | grep vault

In case there are existing volumes, remove the running Vault container via docker rm -f *id* and run docker volume rm -f *volume name* Afterward, run docker-compose up -Vd vault and re-run rake vault:setup.

Vault permission denied

Usually, this means that one of your Vault tokens has expired.

To fix the issue:

1. Run rake vault:load_policies
2. Run rake render:config

3. Restart Vault dependant components:

   docker-compose up -Vd barong peatio cron_job deposit deposit_coin_address withdraw_coin upstream
   
   # If you are using Finex
   docker-compose up -Vd finex-engine
   
   # If you are using Peatio Matching Engine
   docker-compose up -Vd matching order_processor trade_executor

Terraform Infrastructure as Code Provisioning

You can easily deploy OpenDAX from scratch on Google Cloud Platform using Terraform!

To do this, just follow these simple steps:

• Fill app.yml with correct values
• Run rake terraform:apply
• Access your VM from the GCP Cloud Console

To destroy the provisioned infrastructure, just run rake terraform:destroy

Installer tool

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/openware/opendax/master/bin/install)"

Using an OpenDAX deployment for local frontend development

If you'd like to use a real API from an existing OpenDAX deployment when developing frontend components(e.g. baseapp), modify templates/config/gateway/envoy.yaml.erb file the following way:

1. Set allow_origin as "*"

2. Configure all the needed HTTP methods in allow_methods. For example: allow_methods: "PUT, GET, POST, DELETE, PATCH"

3. Add 'total, page, x-csrf-token' to allow_headers value

4. Configure expose_headers in a similar way expose_headers: "total, page, x-csrf-token"

5. Add allow_credentials: true to your CORS configuration

After completing these steps, you should have the following config:

cors:
  allow_origin:
  - "*"
  allow_methods: "PUT, GET, POST, DELETE, PATCH"
  allow_headers: "content-type, x-grpc-web, total, page, x-csrf-token"
  expose_headers: "total, page, x-csrf-token"
  allow_credentials: true

Afterwards, apply the config onto your deployment:

rake render:config
docker-compose up -Vd gateway

Happy trading with OpenDAX!

If you have any comments, feedback and suggestions, we are happy to hear from you here at GitHub or here: crypto exchange software

2.6 Migration guide

To migrate from 2.5 to 2.6, do the following:

1. Pull 2-6-stable branch While rebasing, rename your vault.token to vault.root_token in config/app.yml
2. Run rake render:config
3. Run dc up -Vd vault
4. Run rake service:all