This document discusses NFTs on StarkNet, including what NFTs are, how they differ from copying digital files, the author's experience with NFTs since 2017, NFT economics, marketplaces, genres, use cases, considerations around plagiarism and scalability, and how StarkNet addresses scalability issues. It provides a demo NFT collection on StarkNet and helpful links for building NFT contracts on StarkNet.

1. NFTs on StarkNet
Sean from Aspect.co & Starkscan.co
Oct 2022

2. What is an NFT? Bitcoin Analogy
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● Bitcoin blockchain is numbers tied to an address on the blockchain.
● Instead of numbers, NFTs are URLs and other metadata.

3. Can’t I copy and paste the JPEG?
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● You can take a picture of the Mona Lisa, but do you own it?
● NFTs are the only verifiable version of the digital asset, as minted by the
original artist
● The value of the NFT is attached to the ownership on the blockchain.

4. My Journey with NFTs
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● 2017 - University of Waterloo interns building Crypto Punk only marketplace
● End of 2017 - CryptoKitties
● Bored Ape Yacht Club took over a ranking site we built

5. Economics
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● Artists set & earn royalties in perpetuity: ~10% on every secondary sale
● Marketplaces earn 2 - 5% on every sale
● NFTs peaked in 2021

6. Marketplace Overview
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● General marketplaces (Aspect, MS, OS, RARI, LR, X2Y2, ME)
● Aggregators (Gem, Genie, Hyperspace)
● Art (SuperRare, Foundation)
● NFT AMM (SudoSwap, NFTx)

7. NFT Genres
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● Art & 1 of 1s
● 10k PFP
● Generative Art
● Physical Goods & Services
● DAO Tokens
● Brands & Celebs
● Virtual Goods
● Loot

8. Use Cases
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9. 9
Games

10. 10
Signaling

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Digital Monetization and Creator Tools

12. Considerations
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13. Plagiarism
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● Anyone can mint any digital file as an NFT
● Wallet addresses are mostly verified on Twitter
● Marketplaces also try to verify

14. Scalability
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● Txs were costing over $200+ for NFTs during bull market
● Limits for high supply collections and games

15. How does StarkNet solve scalability?
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16. 16
Batching transactions into single proof

17. Up to 100x Transaction Fee Savings vs. ETH
100x
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18. NFT StarkNet considerations
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● Currently does not support long strings
● Need to use Array of felts for tokenURI
● Use a proxy pattern to migrate for Regenesis and Cairo 1.0

19. Demo NFT Collection
Link: https://testnet.aspect.co/collection/0x1416d82dd293e0d6bec7b501a2d9c6c3891a8912f723c58040d48ae3cf9f72f
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20. Helpful Links
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● https://github.com/0xs34n/ERC721-StarkNet-workshop
● https://github.com/starknet-edu/starknet-erc721
● https://github.com/OpenZeppelin/cairo-contracts/blob/main/src/openzeppe
lin/token/erc721/presets/ERC721MintablePausable.cairo
● https://github.com/immutable/imx-starknet/blob/main/immutablex/starkne
t/token/erc721/presets/ERC721_Full.cairo

21. Thank You
https:/aspect.co
https://starkscan.co
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