Taras Filatov: Tech & Product challenges and solutions of NFT launches NFT Tech Conference Website - https://nftconf.org/ Youtube - https://www.youtube.com/channel/UCeHtPZ_ZLZ-nHFMUCXY81RQ/featured FB - https://www.facebook.com/nftconference

1. Tech & Product
challenges and solutions
of NFT launches
https://nftconf.org/
Taras Filatov (taras@dappros.com)
11th Feb 2022

2. Outline
● Randomization challenges
● Metaverse ready NFTs
● Mobile & Unity integration issues
● In-Chat / Social interactions with NFTs
● NFTs on a sidechain
● Non-repetitive randomness
● Land/Property NFT and ownership protections
● Code style

3. Randomization - Pseudo randomness
“Determinism plagues randomness”
Example 1:
function randomNumber() internal view returns (uint) {
return uint(blockhash(block.number - 1));
}
Example 2:
function random() private view returns (uint8) {
return uint8(uint256(keccak256(block.timestamp, block.difficulty))%251);
}

4. Randomization - VRF & Chainlink (1/2)
VRF Coordinator - on-chain
randomness verification

5. Randomization - Chainlink (2/2)
Pros:
● “true” randomness
Cons:
● costs $LINK // 2 mitigation
options
● time delay (requestRandomness
-> fulfillRandomness) - impacts
UX (2-step process) // mitigation
via VRF v2

6. Rich or Metaverse-ready NFTs
These NFTs normally would have one or more of the following features:
● Metadata entries pointing to 3D models and textures or a ready bundle compatible
with Unity, Unreal Engine, Decentraland, Sandbox, Spatial etc
● May also include or support: full-poly and low-poly (lightweight) 3D models, video
and sounds, AR/VR features, file for 3D printing at home etc
● Mutable parameters impacted by object's exploitation in the Metaverse (for a digital
car, for example, that would be mileage, how much fuel left etc)
● Additional/Custom parameters improving the compatibility with certain applications
and metaverse platforms
● Rich NFTs would often be based on advanced NFT standards allowing more flexibility
and combinations of fungible + non-fungible tokens. ERC-1155 offers greater
flexibility in creating such composable tokens corresponding to real needs of
metaverse objects. E.g. limited edition car (1 / 1,000), unique aerography created by an
artist (1/1), fungible token for fuel tank etc.

7. Metaverse -
ready NFTs (1/2)

8. Metaverse -
ready NFTs (2/2)

9. Unity + Mobile + Web3 issues (1/2)
Reading

10. Unity + Mobile + Web3 issues (2/2)

11. Using WebGL
Demo: https://cyber-cars-dev.herokuapp.com/

12. Chat transfers / p2p social marketplace (1/2)

13. Chat transfers / p2p social marketplace (2/2)
https://github.com/dappros/ethora/
https://ethora.com/

14. NFTs on Sidechain

15. Non-repetitive random number generation (1/4)

16. Non-repetitive random number generation (2/4)
https://ethereum.stackexchange.com/questions/118934/want-to-generate-non-repeative-random-
number-in-a-particular-range/119121

17. Non-repetitive random number generation (3/4)
https://ethereum.stackexchange.com/questions/118934/want-to-generate-non-repeative-random-
number-in-a-particular-range/119121

18. Non-repetitive random number generation (4/4)
https://ethereum.stackexchange.com/questions/118934/want-to-generate-non-repeative-random-
number-in-a-particular-range/119121
1
2
3
4
5
1
2
5
4
5
3,
1
2
5
4
3, 2
1
4
5
4
1
4
5
3 2 3
3, 2, 5

19. Land/Property NFTs and ownership protections
https://satoshi-island.com/
● Land NFTs
● Citizenship NFTs
● Lands/Blocks allocation
● Build
● MiniDAO mechanism
Land protections
Rights and duties of “citizens”

20. Code style

21. Land/Property NFTs and ownership protections
Satoshi Island - Land NFTs: expanding standard ERC-721 with rights and protections.

22. Thank you! (Q&A)
taras@dappros.com
@tarasfilatov