Tutorial Campaign

The last few months have been hard. You never thought you could learn so much, but your teachers have been relentless. Only the best and the brightest have what it takes to become a Node Guardian. But while others have washed out, you’re still standing. Nothing is going to stop you from achieving your dream. And now, at last, you face the final test…

In this tutorial, you will learn how to embark on Capture-the-Flag quests!

Some other quests live on Ethereum's Goerli testnet. These quests will require you to study and 'hack' deployed smart contracts. Let us walk through how we can complete such a quest.

lightBulb

First, scroll to the bottom of this page. There, you will see code to the <code class="richtext rt-inlinecode">BanditCamp</code> contract.

Set <code class="richtext rt-inlinecode">bandits</code> in <code class="richtext rt-inlinecode">BanditCamp</code> to <code class="richtext rt-inlinecode">0</code> .

Capturing the Flag

After deploying <code class="richtext rt-inlinecode">BanditCamp</code> onto Goerli, you will need to interact with it. Specifically, you will need to invoke the function <code class="richtext rt-inlinecode">clearCamp()</code>.

Below, we present how to use Hardhat in Questplay to do so.

First, you will need to add your developer account's private key to Questplay. This allows you to sign transactions on the testnet with Hardhat. 

To do so, add the following variables to the <code class="richtext rt-inlinecode">.env</code> file created in the previous quest. The key should be a private key to any testnet account with adequate Goerli-ETH funds.

shieldWarning

If you look at the downloaded <code class="richtext rt-inlinecode">hardhat.config.js</code>, your <code class="richtext rt-inlinecode">.env</code> variables are parsed into Hardhat's configuration to allow you to interact with Goerli. This is a popular approach to private key management in open-source Web3 repositories. Since <code class="richtext rt-inlinecode">.env</code> is in <code class="richtext rt-inlinecode">.gitignore</code>, your private key is not exposed published onto the public repository.

In the quest directory, create a Hardhat script to interact with the deployed <code class="richtext rt-inlinecode">BanditCamp</code>.

Let us save this script in the quest directory, for instance, at <code class="richtext rt-inlinecode">./script/clearcamp.js</code>. After which, run it!

Notice that we specify that we want to run the script on the Goerli testnet, with the flag <code class="richtext rt-inlinecode">--network goerli</code>.

If you have Foundry installed, you can use it just as easily. In the quest directory, create another <code class="richtext rt-inlinecode">.env</code> file to safely hold your private key. 

Then create a Foundry script to interact with the deployed <code class="richtext rt-inlinecode">BanditCamp</code>.

Let us save this script in the quest directory, for instance, at <code class="richtext rt-inlinecode">./script/clearcamp.s.sol</code>. After which, run it!

Notice that we specify that we want to run the script on the Goerli testnet, with the flag <code class="richtext rt-inlinecode">--rpc-url goerli</code>.

In the hours before dawn, your party sneaks up the hill into the bandit camp, catching them completely by surprise. 

You find the bandits awake and having breakfast. They look up at you in shock, but before they even have a chance to reach for their weapons, you cast a simple fear spell. You feel it settle upon their minds, and in seconds they are fleeing in all directions. 

Searching the camp, you discover the goods the bandits have been stealing. The townsfolk will certainly be happy to have all of this back. Packing it all on the bandit's horses, you make your way back to report your success. 

Well done. I never doubted you for a minute, Guardian.

Congratulations, recruit. You have completed your training with flying colors! Now, march onward as a mage of the Order and take on more exciting adventures. Your journey has only just begun...

After weeks of training and studying, your time as an apprentice is almost at an end. You've worked hard and have finally mastered the skills required to become a full-fledged member of the Order of the Node Guardians. 

However, before you can take that title, you must complete one final task to prove yourself worthy. 

This is it! Time to prove that you have been paying attention to what I've taught you. Now is when you show me what you're really made of!&nbsp;

A town a couple of days ride from the city has been complaining of repeated bandit raids for the last few weeks. The Guards had located the camp the bandits have been using, but it's going to be your job to clear it out. 

Can you believe it? We are this close to earning our stripes. How tough can a couple of small-time bandits be?

Clear out the bandit camp and final graduate as a mage of the Order of the Node Guardians!

You have just embarked a simple Capture-the-Flag (CTF) quest on the Goerli testnet.

To recap, CTF quests are generally played in the following manner:

There are many ways to interact with Goerli. If you do not have a strong preference, then we recommend that you use Questplay and Hardhat to do so. This way, you can:

Tutorial 2: CTF

prelude