Let's make a simple NFT/memecoin on the Algorand TestNet! We'll use the Purestake API, NFT Storage, and the Algorand Python SDK to programmatically create some coins/nfts/assets. 1
Tip: If you want to speedrun through this tutorial, just read each heading and the
tl;drs at the end of the section.
- You should hopefully know how to open the terminal and use a code editor. On MacOS or Ubuntu (any Linux-based OS), just open up your terminal. If you are on Windows, I recommend you install WSL, and you will be able to run a Ubuntu terminal on your machine.
- Your machine should have
gitandpythoninstalled.
Open up your terminal and paste the following commands:
git clone https://github.com/algochoi/simple-nft-tutorial.git
cd simple-nft-tutorial
python -m venv .venv # optional
source .venv/bin/activate # optional
pip install -r requirements.txt
Create your first Algorand account
An account consists of a public key and a private key.
- The
public key(akawallet address, orAlgorand address, which is an encoded form of the public key) is like your banking number/etransfer/venmo handle that people can use to send you money. This is okay to share with your friends. - The
private key(akasecret, or sometimesmnemonic, which refers to a set of English words that can be translated into a private key) is like your banking PIN/password. It's probably not a good idea to share your PIN/passwords in real life either, so DO NOT share yourprivate keywith anyone!2
If you run python create_account.py, it will automatically generate your address and secret in a private .env file. Do not share or upload this file anywhere (by default, .env is listed in this repo's .gitignore). We will also use this file later to put our API keys. Please just run the script once, or else it will overwrite all your secrets.
tl;dr run
python create_account.pyin this directory and it should generate a.envfile with your address and secret. DO NOT share your secret with anyone.
For TestNet, we have a bank/faucet that gives you free Algos to test out your program. Go to the faucet, enter your address and get some free money. The funds may take ~10 seconds to settle, but you can check out your funds on the blockchain using AlgoExplorer when the money is loaded. Enter your address in the search bar and confirm that your balances are set to 10.
tl;dr Go to the faucet, enter your
addressand get some free money.
We are going to use an external API to make requests to the blockchain. Sign up for a free Purestake account. When you log on, you should see your API key (where the greyed out box is in the screenshot below).
Don't expose that to the world either - write it down in your .env file in the PURESTAKE_KEY field.
There are many ways of uploading your data or image, but we will use NFT.storage, which will store your image in decentralized IPFS. This way, the file should be able to live for a long time in public storage 3. Sign up for a free account, click on Files, and upload your beautiful image!
Copy the CID from the site and note it down somewhere as we will use it in the next step!
Open create_nft.py with your favorite editor, navigate to the top where it says # Configurable parameters, and customize your asset by changing the TOTAL_SUPPLY (1 means it is a NFT, more than 1 is a custom token/coin/asset), YOUR_UNIT_NAME, YOUR_ASSET_NAME, and YOUR_CID 4. When you're done, save your editor and run python3 create_nft.py. It should take 5~10 seconds to confirm and finalize your transaction on the blockchain 5.
When the transaction goes through, the Python script should output a link to your new asset! e.g. Go to Algoexplorer to look at your beautiful asset: https://testnet.algoexplorer.io/asset/your-asset-here
You should be able to see your new coin/nft on the blockchain! You can view asset information on Algoexplorer by clicking Technical Information and then Creation Tx, which should show you details about your shiny coin. You can access an ipfs url anytime by copying the CID to the end of https://ipfs.io/ipfs/, i.e. https://ipfs.io/ipfs/YOUR_CID_HERE. Here's a dummy example.
tl;dr Edit
create_nft.pywith your token params and runpython3 create_nft.py. It should generate two links for you to look at your shiny asset.
Now that you have created your asset, you might want to send it to someone else. To do this, the receiver needs to opt-in to the asset, have a minimum balance of 0.1 Algo (per asset opted-in), and sign with their private_key to confirm this. Then, the owner of the asset can transfer the asset to the receiver.
todo: add section/script on asset transfers?
Footnotes
-
As a disclaimer, the opinions expressed are solely my own and do not express the views or opinions of my employer. This is meant to be a short, fun, and somewhat insecure guide to NFTs for complete beginners in a hackathon setting. ↩
-
Note that in this tutorial, we care more about speed so we may do potentially unsafe stuff with your
private key. If you are using real funds, make sure you are using kmd or some other secure way for storing your secrets. ↩ -
There are certain best practices when using IPFS because it is a decentralized store. If you are very serious about storing your image/data, you should pin the data against a machine that you also own in addition to relying on other machines. ↩
-
The more technical convention for NFTs, as described by EIP1155 or ARC-0003, is to have a link to your metadata JSON file here. But I've abstracted that layer away from this tutorial. A "NFT" is essentially a link to a JSON that contains a link to your data/image/file. ↩
-
On a more technical note, different blockchains have different block times and different finality times. Block time, imo, does not really matter compared to transaction finality times because the user only cares whether their transaction went through or not rather than individual blocks. According to this source, Ethereum has ~5 minute finality time, Solana is ~13s, Algorand is ~5s, while Avalanche is ~3s. ↩