Clean code.

Author: gorankarlic

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
+artifacts/
 node_modules/

README.md

@@ -1,240 +1,14 @@
-# ⛓️ Blockchain Lab
+# 📧 Crypto Lab
 
-## 1. Download and Install Docker
-
-https://www.docker.com/get-started
-
-Start the newly installed **Docker** application.
-
-## 2. Run Debian linux
-
-### 2.1 Mac
-
-Open the Terminal (`Terminal`) app and run:
-
-```sh
-docker run -it debian
-```
-
-### 2.2 Windows
-
-#### 2.2.1 Instal Terminal app
-
-It is recommended that you install the Terminal app for Windows available at:
-
-[https://www.microsoft.com/en-us/p/windows-terminal/9n0dx20hk701](https://www.microsoft.com/en-us/p/windows-terminal/9n0dx20hk701)
-
-Open the Terminal (`Terminal`) app and run:
-
-```sh
-docker run -it debian
-```
-
-> ### Reuse a previous container
-> 
-> Or to reuse your a previously started container run:
->
->```sh
->docker attach $(docker start $(docker ps -l -q))
-> ```
-
-### 2.3 Command prompt
-
-You will evenutually see a line similar to this:
-
-```sh
-root@5555b7f58ebe:/#
-```
-
-This is the _command prompt_ of the Debian operating system that is now running within a container on your computer.
-
-#### 2.3.1 Verify
- 
-Type the following command to show the Debian version:
-
-```sh
-cat /etc/os-release
-```
-
-It should output `Debian GNU/Linux 12 (bookworm)` amongt other information.
-
-## 3. Install Ethereum client
-
-### 3.1 Install `wget`
-
-`wget` is a utility which can download files from the internet. To install `wget` run:
-
-```sh
-apt-get update && apt-get install -y wget
-```
-
-### 3.2 Download `geth`
-
-`geth ` is the most popular Ethereum client. It is written in the _Go_ programming language.
-
-To download `geth`,
-
-if you have processor with an x64 architecture (e.g., AMD, Intel), run:
-
-```sh
-cd && wget -O geth.tar.gz https://gethstore.blob.core.windows.net/builds/geth-alltools-linux-amd64-1.13.4-3f907d6a.tar.gz
-```
-
-if you have processor with an ARM architecture (e.g., Apple M1), run:
-
-```sh
-cd && wget -O geth.tar.gz https://gethstore.blob.core.windows.net/builds/geth-alltools-linux-arm64-1.13.4-3f907d6a.tar.gz
-```
-
-### 3.3 Install `geth`
-
-To unpack and install then downloaded program files run:
-
-```sh
-cd && tar -xvf geth.tar.gz --exclude=COPYING --strip-components=1 && rm geth.tar.gz && chmod u+x * && mv * /usr/bin
-```
-
-### 3.4 Verify result
-
-Type the following command to show the location of the `geth` program:
-
-```sh
-which geth
-```
-
-It should output `/usr/bin/geth`.
-
-## 4. 🥨 "Look ma, I gots them blockchains!"
-
-### 4.1 Run your own Ethereum node
-
-You are now ready to participate in the Ethereum network. To start you local node run:
-
-```sh
-geth
-```
-
-If you follow the output, you will notice that your node will do the following:
-
-1. Find _peers_ 
-2. Once found, it will start downloading a local copy of the blockchain
-
-> If it fails to find any peers, it might be because your operating system firewall or the network is blocking the connections.
-> 
-> Try following:
->
-> 1. Connect to a less restrictive network, like your mobile phone hotspot
-> 1. ⚠️ Temporarily disable the firewall in the operating system settings (do not forget to enable the firewall after lab session)
-
-If you want to stop your node press `CTRL+C`.
-
-### 4.2 Interact with the blockchain using your Ethereum node CLI
-
-To interact with the blockchain using your Ethereum node's CLI (command line interface a.k.a. console) run:
-
-```sh
-geth --syncmode light --verbosity 1 console
-```
-
-> You can find the reference for the console commands in the [Web3 documentation](https://web3js.readthedocs.io/en/v1.2.11/).
-
-### 4.2.1 View peers
-
-To view the peer nodes that you are currently connected to:
-
-```js
-admin.peers
-```
-
-You will notice that each peer has a remote IP address (here the IP address is `94.176.237.140`):
-
-```js
-remoteAddress: "94.176.237.140:30303"
-```
-
-You can query the peer's IP address using a [Geolocation tool](https://tools.keycdn.com/geo) to find out where they are.
-
-### 4.2.2 View blocks
-
-Take a look at block number `3`:
-
-```js
-eth.getBlock(3)
-```
-
-Take a look at the latest block number:
-
-```js
-eth.blockNumber
-```
-
-Take a look at the latest block:
-
-```js
-eth.getBlock(eth.blockNumber)
-```
-
-### 4.2.3 View some funny stuff in block number 14000
-
-Block number `14000` has an interesting message in it's _extra data_:
-
-```js
-web3.toAscii(eth.getBlock(14000).extraData)
-```
-
-Now take look at the _extra data_ in the latest block:
-
-```js
-web3.toAscii(eth.getBlock(eth.blockNumber).extraData)
-```
-
-### 4.2.4 Dive deeper into block transactions
-
-Take a look at block `1000000`:
-
-```js
-eth.getBlock(1000000)
-```
-
-Block `1000000` has two transactions. Take a look at the first transaction in that block:
-
-```js
-eth.getTransaction("0xea1093d492a1dcb1bef708f771a99a96ff05dcab81ca76c31940300177fcf49f")
-```
-
-Take a look at how much Ether the account that mined the last block has:
-
-```js
-web3.fromWei(eth.getBalance(eth.getBlock(eth.blockNumber).miner), "Ether")
-```
-
-### 4.2.5 Create a new account
-
-Create a new account:
-
-```js
-personal.newAccount()
-```
-
-## 4.2.6 Exit the Geth console
-
-Exit the console:
-
-```js
-exit
-```
-
-# ✉️ Crypto Lab
-
-## 1. Install Docker
+## 1. Install Docker Desktop
 
 On Mac:
 
-[https://download.docker.com/mac/stable/Docker.dmg](https://download.docker.com/mac/stable/Docker.dmg)
+[https://docs.docker.com/desktop/setup/install/mac-install/](https://docs.docker.com/desktop/setup/install/mac-install/)
 
 On Windows:
 
-[https://download.docker.com/win/stable/Docker%20Desktop%20Installer.exe](https://download.docker.com/win/stable/Docker%20Desktop%20Installer.exe)
+[https://docs.docker.com/desktop/setup/install/windows-install/](https://docs.docker.com/desktop/setup/install/windows-install/)
 
 ## 2. Run Debian linux
 
@@ -357,6 +131,7 @@ Create a private key:
 ```sh
 openssl genpkey -algorithm RSA -out private.txt
 ```
+
 #### 4.2.1 View the private key
 
 View the created private key:
@@ -372,6 +147,7 @@ Derive a public key:
 ```sh
 openssl rsa -pubout -in private.txt -out public.txt
 ```
+
 #### 4.2.4 View the public key
 
 View the created public key:

contracts/README.md

@@ -0,0 +1,3 @@
+# 📜 Smart Contracts
+
+Minimal smart contract examples.

auction/Auction.sol renamed to contracts/auction/Auction.sol

@@ -37,7 +37,7 @@ <h4 class="ui dividing header">System log</h4>
             <br/>
         </div>
         <script type="module">
-            const node = "https://eth-mainnet.gateway.pokt.network/v1/lb/29934f7f10137fb45e8609a0";
+            const node = "https://ethereum-rpc.publicnode.com";
             const provider = new ethers.JsonRpcProvider(node);
 
             document.querySelector("#getBlockNumber").addEventListener("click", async () =>