feat(p2p/krypto-tour): add workshop

p2p/3.foundry/SETUP.md

@@ -2,7 +2,7 @@
 
 ## Install foundry
 
-Please follow the instructions given [here](https://github.com/foundry-rs/foundry#installation).
+Please follow the instructions given [here](https://book.getfoundry.sh/getting-started/installation).
 
 After the installation, run the following command to ensure it has been properly installed on your computer:
 
@@ -17,7 +17,7 @@ It should print your current version.
 Now we will initialize the project:
 
 ```shell
-forge init workshop --no-commit
+forge init workshop
 ```
 
 ## Back to the workshop

p2p/krypto-tour/HelloWorld.sol

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: UNLICENSED 
+pragma solidity ^0.8.25;
+
+contract HelloWorld {
+    function hello() public pure returns(string memory) {
+        return "Hello world";
+    }
+}

p2p/krypto-tour/README.md

@@ -0,0 +1,148 @@
+# Workshop - Discover Blockchain Development and Tools
+
+✔ 📖 **Discover Foundry**  
+✔ 🛠️ **Deploy a Smart-Contract on a Local Blockchain**  
+✔ 🚀 **Call this Smart-Contract**
+
+## Introduction
+
+This workshop introduces blockchain development and the tools you'll need to deploy and interact with smart contracts. We’ll guide you through deploying your first smart contract using Foundry on a local blockchain, and calling it to see how it works.
+
+### What is a Smart Contract?
+A smart contract is a self-executing contract with the terms directly written into code. Once deployed on a blockchain, it can be interacted with like any other piece of software, but it's decentralized, meaning no one can alter it once it's live.
+
+## Prerequisites
+
+This workshop requires **no prior knowledge**. All you need is a computer and an internet connection.
+
+## Step 1 - Install VSCode
+
+VSCode is a text editor that developers use to write code. Think of it like a digital notebook where you'll be writing your smart contract.
+
+1. Go to the [official website](https://code.visualstudio.com/download) and download the version of VSCode for your operating system.
+2. Follow the installation instructions on the site, and once installed, open it up. You'll use it to write your smart contract later.
+
+## Step 2 - Install Foundry
+
+Foundry is a set of tools that helps you develop and test smart contracts quickly.
+
+1. Follow the instructions given [here](https://book.getfoundry.sh/getting-started/installation) to install Foundry. The guide walks you through installing it on your system.
+2. After installation, run the following command in your terminal to make sure it's installed correctly:
+   To open a terminal in vscode, click on the **Terminal** tab in the top menu and then click on **New Terminal**
+   ```shell
+   forge --version
+   ```
+   If everything went well, you should see the current version of Foundry printed out.
+
+
+## Step 3 - Initialize Your Project
+
+### What is Initialization?
+Initialization sets up the basic structure of your project.
+
+1. In your terminal, navigate to the folder where you want to create your project. Then, run the following command to initialize the project:
+
+   ```shell
+   forge init workshop
+   ```
+
+   This will create a new project folder called `workshop` with some starter files.
+
+### Delete Unnecessary Files
+Some of the files that come with the starter project aren’t needed for this workshop.
+
+1. Delete the following folders and file:
+   - `test` folder
+   - `script` folder
+   - `Counter.sol` file in the `src` folder
+
+2. Now, add the file `HelloWorld.sol` in the `src` folder. This is the smart contract you'll be deploying.
+   - The smart contract have only one function `hello()` that returns the message `Hello world`.
+
+## Step 4 - Start the Local Blockchain
+
+### What is a Local Blockchain?
+A local blockchain is like a blockchain simulator running on your computer. It allows you to test your smart contracts without using real money or interacting with a public blockchain.
+
+1. To start your local blockchain, run the following command in the terminal:
+
+   ```shell
+   anvil
+   ```
+
+   Anvil will start up a local blockchain and give you a list of pre-created wallets. Each wallet has some fake cryptocurrency in it so that you can deploy smart contracts without needing real money.
+
+2. **Copy one of the private keys** from the list. You will use this key to deploy your smart contract in the next step.
+
+## Step 5 - Deploy the Smart Contract
+
+### What Does Deploying Mean?
+When you deploy a smart contract, you're publishing it on a blockchain so it can be used. Once deployed, it's live and ready for interaction.
+
+1. To deploy your smart contract, run the following command:
+
+   ```shell
+   forge create --private-key PRIVATE_KEY src/HelloWorld.sol:HelloWorld
+   ```
+
+   Replace `PRIVATE_KEY` with the private key you copied earlier from the local blockchain. 
+
+2. After running the command, you'll see some information about the deployment. Look for the part that says `deployed to`, followed by an address. **Copy this address**, as it is where your smart contract is located on the blockchain, and you'll need it in the next step.
+
+## Step 6 - Call the Smart Contract
+
+### What Does Calling a Smart Contract Mean?
+Calling a smart contract means interacting with it by executing one of its functions. For this workshop, you’ll call the `hello()` function of the smart contract, which will return a message.
+
+1. Run the following command to call the `hello()` function:
+
+   ```shell
+   cast call CONTRACT_ADDRESS "hello()" | tr -d '\n' | cast to-ascii
+   ```
+
+   Replace `CONTRACT_ADDRESS` with the address of the smart contract that you copied earlier.
+
+2. You should see the output `Hello world`. 
+
+   Here's what each part of the command does:
+   - `cast call` is used to call a function in the smart contract.
+   - The first argument is the address of the smart contract.
+   - The second argument is the function to call (`hello()` in this case).
+   - `tr -d '\n'` removes the newline character at the end of the output.
+   - `cast to-ascii` converts the output from hexadecimal to readable text (ASCII).
+
+## Conclusion
+
+Congratulations! You've just deployed and called a smart contract on a local blockchain. You've taken your first steps into blockchain development, and I hope this workshop has given you a taste of how powerful this technology can be.
+
+Feel free to explore more, modify the smart contract, and dive deeper into Foundry and blockchain!
+
+
+## Authors 👋
+
+| [<img src="https://github.com/Intermarch3.png" width=120><br><sub>Lucas LECLERC</sub>](https://github.com/Intermarch3) |
+| :--------------------------------------------------------------------------------------------------------------------: |
+
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