fb
(Frank Buss)
August 19, 2021, 6:04pm
1
I’ve watched this live minting (Stephen Wolfram’s Picks of Cellular Automata from the Computational Universe): https://youtu.be/pMfrRFNCKhE
and looks like it uses the Cardano blockchain, but I can’t find it in the Cardano blockchain explorer. I asked for it on the Youtube video, I sent a question about it to SUPPORT and I asked a question on the Tweet at Henry King on X: "@frank_buss @stephen_wolfram Same. I enjoyed the youtube livemint event but admit I was drawn in by the prospect of a commemorative NFT. No answer yet. @liveminting" / X
but so far all messages from me are ignored. Does someone here have the information where I can find the NFT, and maybe even buy it?
christianp
(Christian Pasquel)
August 19, 2021, 11:41pm
2
Hi Frank,
Thanks for your interest and sorry we missed your tweet.
We are working on having them available at an auction site but this is the list of transaction IDs for each NFT:
<|"Crashing Waves" ->
"21cfb19008ab171a1acdf7f3f35fd348e8f0424a59e94b4b24ec5ab3c394342c",
"Downarrows" ->
"03d3d435653d1f240710b89c2fa55bde904a7cac11ba187073bfe365297f28fe",
"Infinite Willow" ->
"51ed7abe524f98b8337861610368a51bc89367d81ce09a68f94f77e91feaa0d4",
"Organic Power Tie" ->
"8d178487fafac0aae5a200c11afc60640792cfa4af4bcb84e930341a253fb947",
"The Tracks Emerge" ->
"00d972c54850b7c0c35d917a759610c636659b9d12fdeaa830cd193002084bfc",
"Circuit Seaweed" ->
"60334b0d59a47eb276236bde674476445cc686f3feb32d2316afb4bcf7520836",
"Crystal Queen" ->
"c7ee4c34918fe2ecf9216dbdc617c5206545e055c90db07441570754e130ddc3",
"Plant City" ->
"a26fbf37a65d541a74b393c4ca5a4cde61b340cb337a882e9df77a60bba449a4",
"The Irreducible Carpet" ->
"c31ce9da388d70cc7e3ae50158883612901bd54a00b66ceb17cbbd1d3909cd4e",
"The Never-Ending Jungle Gym" ->
"95b03d5877524451094a9b66312a4b3b14e7a2ef74dfc6cef231263511d63b5e"|>
You can inspect the NFT from a Cardano explorer or directly from Wolfram Language using BlockchainTransactionData. In particular, check the Metadata field e.g.
BlockchainTransactionData["a26fbf37a65d541a74b393c4ca5a4cde61b340cb337a882e9df77a60bba449a4",BlockchainBase->"Cardano"]["Metadata"]
The IPFS CIDs are stored in the src field. You can use the CID to download the image from IPFS using ExternalStorageDownload, e.g.
ExternalStorageDownload["QmPcagFCTfrScHkncxzF5V1vx1tvxdi1RQk1Xby2T1wbWY",ExternalStorageBase->"IPFS"]
Please let me know if you have more questions!
fb
(Frank Buss)
August 20, 2021, 1:52am
3
Thanks, I can see it in the blockchain explorer, and ExternalStorageDownload works in Mathematica. But I can’t download the ifps image files with the ipfs.io gateway. For example, the ipfs readme works:
https://ipfs.io/ipfs/QmQPeNsJPyVWPFDVHb77w8G42Fvo15z4bG2X8D2GhfbSXc/readme
But one of the NFT images spins forever in the browser and doesn’t download anything:
https://ipfs.io/ipfs/QmPcagFCTfrScHkncxzF5V1vx1tvxdi1RQk1Xby2T1wbWY
ExternalStorageDownload does download both immediately.
I’m not sure how IPFS works in detail, but shouldn’t the official gateway deliver any file stored on IPFS?
fb
(Frank Buss)
August 20, 2021, 5:45am
4
PS: I found a NFT explorer for Cardano:
But looks like the NFTs have a different format. For example this is one of the NFTs from the website:
Is there a standard how to encode NFTs on the Cardano blockchain?
averyd
(Avery Davis)
August 20, 2021, 4:33pm
5
Worked fine for me? Import["https://ipfs.io/ipfs/\ QmPcagFCTfrScHkncxzF5V1vx1tvxdi1RQk1Xby2T1wbWY"]
Here’s this one as an animated gif for fun https://www.wolframcloud.com/env/averyd/CAanimations/Plant_City
fb
(Frank Buss)
August 20, 2021, 6:27pm
6
Looks like the ipfs.io website is not very stable. Right now the site doesn’t work at all.
christianp
(Christian Pasquel)
August 21, 2021, 12:54am
7
Different IPFS nodes can be configured differently and that kind of goes beyond our control. The IPFS gateway is working fine for me though.
You can also try the Pinata gateway, e.g.
https://gateway.pinata.cloud/ipfs/QmPcagFCTfrScHkncxzF5V1vx1tvxdi1RQk1Xby2T1wbWY
christianp
(Christian Pasquel)
August 21, 2021, 12:57am
8
There’s no “official standard” per se but we followed the structure suggested by IOHK that you can see in this CIP:
---
CIP:
Title: NFT Metadata Standard
Authors: Alessandro Konrad <alessandro.konrad@live.de>, Smaug <smaug@pool.pm>
Comments-URI:
Status: Draft
Type: Informational
Created: 2021-04-08
Post-History: https://forum.cardano.org/t/cip-nft-metadata-standard/45687 and https://www.reddit.com/r/CardanoDevelopers/comments/mkhlv8/nft_metadata_standard/
License: CC-BY-4.0
---
## Abstract
This proposal defines an NFT Metadata Standard for Native Tokens.
## Motivation
Tokens on Cardano are a part of the ledger. Unlike on Ethereum, where metadata can be attached to a token through a smart contract, this isn't possible on Cardano because tokens are native and Cardano uses a UTxO ledger, which makes it hard to directly attach metadata to a token.
So the link to the metadata needs to be established differently.
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