At-home watchtowers
Steps to run a Witness Chain watchtower client to validate location claims
The PoL Watchtower Client Node participates in the Proof-of-Location (PoL) protocol by verifying location claims made by DePIN (Decentralized Physical Infrastructure Network) Nodes.
You can read about DePIN networks here
Watchtower nodes can run on community members' laptops, desktops, or cloud instances. Nodes are selected to participate in PoL challenges via a probabilistic algorithm.
Prerequisites
Docker: Version 23.0.0 or higher (Install Docker).
Instance: Minimum t2.micro equivalent (1 vCPU, 1GB RAM, 5GB disk). Recommended: 2 cores, 4GB RAM, 10GB disk.
ECDSA KeyPair ( This video demonstrates how you can use MetaMask to export one ). This will be used for registration & signing purposes.
Ports to Open (for public IP only)
Incoming (TCP & UDP): 11112, 22223, 33334-33336, 44445-44447, 55556
Outgoing: Allow all.
Witness Chain Explorer: https://blue-orangutan-blockscout.eu-north-2.gateway.fm/
Our chain is gasless, so you do NOT have to fund either or the operator or watchtower account with tokens.
Running the Watchtower Client
1. Installing and registering the Watchtower Key
Download and install the witness CLI:
After the installation is completed, register your watchtower key on WitnessChain's Layer 2 Chain: Use the KeyPair that you would have exported or created using Metamask or any other wallet.
Why should I register?
Registration helps with identification of your watchtower inside Witness Chain's watchtower network
2. Configuring watchtower.env File
Create a
watchtower.env
configuration file with the following example entries.If you are running this at home and DON'T have a public IP, you need to change the following entries only in the watchtower.env file
latitude, longitude, country, region, city, privateKey, walletPublicKey
You can get detailed explanation about these parameters here
3. Running the Watchtower Client
Start the challenger client:
Verify the client is running:
If you see an error about "registration required on DCL contract," make sure to complete the watchtower key registration.
Post-Setup
Check logs using:
Once the client is ready, you're part of Witness Chain's Watchtower family!
Troubleshooting
The days might be rainy or snowy, but we've got umbrellas and sweaters!. For support, join our Discord or reach out on Telegram.
FAQs
What do the parameters in watchtower.env mean ?
What do the parameters in the docker run mean?
docker run -d
: Runs the container in detached mode (in the background).
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