# (0) I Need Fuel. I decided to join the newly introduced 'Attackathon' on the [Immunefi](https://immunefi.com/boost/fuel-network-attackathon/) platform; it's a first for them, and for me. Not only is there a big prize pool to be won, but it's also introducing a new programming language, Sway, which I'm sure will be challenging and fun to learn... Here's hoping. > ## What's an Attackathon? > > Attackathons are education-based bughunting contests where whitehat hackers compete over a reward pool by submitting impactful bugs in the project's code. > > **Before the Attackathon** > Immunefi works with the project to host a security-focused education period, providing top tier education and support to security researchers. > > **During the Attackathon** > Whitehats experience ideal bughunting conditions, with direct project support, responsiveness, and duplicate rewards. > > **After the Attackathon** > Immunefi spotlights the security accomplishments, with a custom leaderboard, Attackathon findings report, bug fix reviews, and NFT awards. > > Ultimately, Attackathons serve to secure projects, develop their security ecosystem, and create new opportunities for whitehats. > > source: [Fuel Attackathon | Immunefi](https://immunefi.com/academy/fuel-network-attackathon/) Before going deep into Fuel, I thought I'd have a look and feel for the Sway programming language. Using the [documentation](https://fuellabs.github.io/sway/v0.60.0/book/index.html), I'll get setup and follow the [Developer Quickstart Quide](https://docs.fuel.network/docs/intro/quickstart/) for one of the development tutorials. --- ## Smart Contract Quickstart: Fuel Injection Installation *NB: I'm using VS Code as my editor, and I will continue my journey with Radicle and use that as my repo instead of Github. Also, I installed the Sway extension as recommended by Fuel.* We firstly create a working directory and initialise a git repo. ```bash mkdir counter-tutorial git init ``` Then we install fuel following the [instructions](https://docs.fuel.network/guides/contract-quickstart/) ```bash curl https://install.fuel.network | sh ``` Straightforward and didn't run into any issues. I then did the update steps just in case. ```bash fuelup update updating the 'latest-x86_64-unknown-linux-gnu' toolchain [00:00:00] [########################################] 4.84 KiB/4.84 KiB (0s) - Download complete Downloading: forc forc-explore forc-wallet fuel-core fuel-core-keygen latest updated updated components: - forc 0.60.0 - forc-explore 0.28.1 - forc-wallet 0.7.1 - fuel-core 0.26.0 - fuel-core-keygen 0.26.0 ``` --- ## The counter contract So the following command will generate our Sway contract, I guess this is similar to any tutorials that provide pre-built examples to use. ```bash forc template --template-name counter counter-contract ``` After this I can initialise my Radicle repo too. ```bash rad node start rad init ``` **Output:** * [The Radicle repo](https://app.radicle.xyz/nodes/seed.radicle.garden/rad:z33zCPgNNzPxBBuJMRMjhgGbZHzwt) ```bash rad init Initializing radicle 👾 repository in /home/pxng0lin/web3/immunefi/fuel/fuel-tutorials.. ✓ Name Fuel tutorials ✓ Description Fuel tutorials for development with Sway ✓ Default branch main ✓ Visibility public ✓ Passphrase: [REDACTED*] ✓ Unsealing key... ✓ Repository fuel-tutorials created. ... ``` ```bash counter-contract ├── Forc.toml └── src └── main.sw 1 directory, 2 files ``` ### Building (compiling) the contract. Following the instructions we can now build the contract ```bash forc build Creating a new `Forc.lock` file. (Cause: lock file did not match manifest) Removing core Removing counter Removing std git+https://github.com/fuellabs/sway?tag=v0.31.1#c32b0759d25c0b515cbf535f9fb9b8e6fda38ff2 Adding core Adding std git+https://github.com/fuellabs/sway?tag=v0.60.0#2f0392ee35a1e4dd80bd8034962d5b4083dfb8b6 Created new lock file at /home/pxng0lin/web3/immunefi/fuel/fuel-tutorials/counter-contract/Forc.lock Finished debug [unoptimized + fuel] target(s) in 3.56s ``` Next we will setup a local wallet, this comes along side Fuel so we shouldn't have any issues here either. ```bash forc wallet new ``` Since this is a tutorial I won't make the password complex, I'm more than likely to forget if I do. ```bash Wallet mnemonic phrase: [REDACTED] ``` We will create a new wallet account to get our fuel address using the command `forc wallet account new`. ```bash Please enter your wallet password to derive account 1: Wallet address: [REDACTED] ``` ### Deploying our contract We will now deploy to the testnet by running the command `forc deploy --testnet`. Once we've provided the password for our wallet we should receive confirmation of deployment. **Error!** What's this? So we are unable to deploy since we have 0 funds in our wallet. So in the tutorial we can get some funds from the [faucet](https://faucet-testnet.fuel.network/) After fuelling up we will try that again. ```bash forc deploy --testnet Finished release [optimized + fuel] target(s) in 3.28s Please provide the password of your encrypted wallet vault at "[REDACTED]": --------------------------------------------------------------------------- Account 1: [REDACTED] Asset ID : f8f8b6283d7fa5b672b530cbb84fcccb4ff8dc40f8176ef4544ddb1f1952ad07 Amount : 2000049 --------------------------------------------------------------------------- Please provide the index of account to use for signing: 1 Do you agree to sign this transaction with [REDACTED]? [y/N]: y Contract counter-contract Deployed! Network: https://testnet.fuel.network Contract ID: 0x71a2a7efd28e8b80388105cb3bb52ca5e100b21cb034ee6e44a5ffb135f7f361 Deployed in block 0018e86c ``` **Success!** This finished the tutorial! So I'll also wrap it up here. The next step they have are further tutorials. I'll have a read through the [Sway documentation](https://docs.fuel.network/docs/sway/) to get a better feel of what I'm looking at in the contract, and potentially move on to [Sway Program Types](https://docs.fuel.network/docs/sway/sway-program-types/) and build a Predicate following the tutorial; until the next article, thanks for reading.