# Pro Hardware Guide This guide is written for professional liquidity providers to turn a powerful Mini PC into an always-on OpenDEX node. ![](/files/icBxTeBpn0DTTLDrzxdJ) Two options are available: 1. **Light setup** using [Neutrino](https://github.com/lightninglabs/neutrino) and a random open eth provider or optionally [Infura](https://infura.io/). This keeps the setup light-weight & cheap, but creates a certain dependency on other people's full nodes. 2. **Full setup** using [bitcoind](https://github.com/bitcoin/bitcoin/), [litecoind](https://github.com/litecoin-project/litecoin) and [geth](https://github.com/ethereum/go-ethereum). Requires more resources and an SSD, but keeps the setup trustless. ### Light Reference Shopping List (Europe): \~180 € * [GIGABYTE GB-BLCE-4105 BRIX](https://www.computeruniverse.net/en/gigabyte-gb-blce-4105-brix): 138 € * [4 GB RAM](https://www.computeruniverse.net/en/crucial-4gb-ddr4-so-dimm-ct4g4sfs824a-2400mhz-ram): 15 € * [120GB M.2 SSD](https://www.computeruniverse.net/en/wd-green-ssd-m2-2280-120gb): 20 € * [USB stick for backups](https://www.amazon.es/dp/B00TPG6P22/): 3,99 € * Any >1GB USB stick will do. * A NAS/Samba share works too. ### Full Reference Shopping List (Europe): \~465 € * [GIGABYTE GB-BLCE-4105 BRIX](https://www.computeruniverse.net/en/gigabyte-gb-blce-4105-brix): 138 € * Alternative: [ODROID H2+](https://www.hardkernel.com/shop/odroid-h2plus/) - same platform, features NVME, needs separate case, power supply and wifi dongle, out of stock at times * [32 GB RAM](https://www.computeruniverse.net/en/kingston-hyperx-impact-32gb-ddr4-so-dimm-ram-2): 127 € * Alternative: [List of compatible RAM](https://wiki.odroid.com/odroid-h2/hardware/ram) * [2TB SSD](https://www.computeruniverse.net/en/sandisk-ssd-plus-25-2tb): 193 € * Alternative: [1 TB M.2 SSD NVME](https://www.computeruniverse.net/en/gigabyte-ssd-nvme-m2-2280-1tb) - for Odroid H2+ * Alternative: [240GB M.2 SSD](https://www.computeruniverse.net/en/wd-green-ssd-m2-2280-240gb) + [2TB HDD](https://www.computeruniverse.net/en/seagate-firecuda-compute-st2000lx001-sshd-2tb) * [USB stick for backups](https://www.amazon.es/dp/B00TPG6P22/): 3,99 € * Any >1GB USB stick will do. * A NAS/Samba share works too. ### Setup 1. [Download Ubuntu Server 20.04 LTS](https://ubuntu.com/download/server) onto your computer. Any other linux distribution supporting docker is also fine. This guide was written using `Ubuntu Server 20.04`. 2. Insert a USB Stick into your computer and [create the a bootable USB Stick](https://ubuntu.com/tutorials/tutorial-create-a-usb-stick-on-ubuntu) with the ubuntu image you just downloaded. 3. Open your Mini PC, plug in RAM & drives, close it, connect it to your router via ethernet cable and to a power supply. Connect a screen via HDMI, a USB keyboard, the created bootable USB Stick, fire the Mini PC up and follow the the inital setup instructions. 4. Update ubuntu via `sudo apt update && sudo apt upgrade` 5. If you are using Ubuntu 20.04, install docker & docker-compose by running `sudo apt install docker.io`. Otherwise if you are using any version besides Ubuntu 20.04, follow the [official instructions](https://docs.docker.com/install/linux/docker-ce/ubuntu/) to install docker. 6. Add new user `opendex`: ```bash ubuntu@ubuntu:~$ sudo adduser opendex Adding user `opendex' ... Adding new group `opendex' (1001) ... Adding new user `opendex' (1001) with group `opendex' ... Creating home directory `/home/opendex' ... Copying files from `/etc/skel' ... New password: Retype new password: passwd: password updated successfully Changing the user information for opendexd Enter the new value, or press ENTER for the default Full Name []: Room Number []: Work Phone []: Home Phone []: Other []: Is the information correct? [Y/n] ubuntu@ubuntu:~$ Y ``` 1. Add the `opendex` user to the sudo group (advanced users can skip this and use another user to run sudo commands), the docker group and test if docker is working: ```bash ubuntu@ubuntu:~$ sudo usermod -aG sudo opendex ubuntu@ubuntu:~$ sudo usermod -aG docker opendex # switch to user opendex ubuntu@ubuntu:~$ sudo su - opendex opendex@ubuntu:~$ docker run hello-world Hello from Docker! This message shows that your installation appears to be working correctly. ``` 1. Looking good! Optionally, add an alias to enter your opendexd environment by simply typing "opendex": ```bash opendex@ubuntu:~$ sudo nano ~/.bash_aliases # add the line alias opendex='bash ~/opendex.sh' # CTRL+S, CTRL+X. Then run opendex@ubuntu:~$ source ~/.bashrc ``` 1. Connect the USB stick to your machine and set it up. It is very important to do this for a mainnet setup (given you do not want to lose money)! ```bash # check the USB stick's path with opendex@ubuntu:~$ ls -la /dev/ | grep sd crw------- 1 root root 2, 61 Dec 3 16:27 ptysd brw-rw---- 1 root disk 8, 0 Dec 3 16:27 sda brw-rw---- 1 root disk 8, 1 Dec 3 16:27 sda1 #this is your USB Stick crw------- 1 root root 3, 61 Dec 3 16:27 ttysd # set it to automount via fstab opendex@ubuntu:~$ sudo nano /etc/fstab # add the line /dev/sda1 /media/USB ext4 defaults 0 2 # CTRL+S, CTRL+X. Then mount it opendex@ubuntu:~$ sudo mkdir /media/USB opendex@ubuntu:~$ sudo mount -a # check if mounting worked opendex@ubuntu:~$ df -h # make sure opendexd can use it opendex@ubuntu:~$ sudo chown opendex:opendex /media/USB ``` **DONE!** Continue [here](/docs/liquidity-providers.md#the-setup). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://opendex.network/docs/liquidity-providers/pro-hardware.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.