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3 votes
1 answer
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My NFT image doesn't appear on etherscan

I've created a simple ERC721 contract and minted some NFTs, as I mint the images are visible on opensea but not on etherscan. here is my contract, https://goerli.etherscan.io/address/...
Nishant Pacharne's user avatar
2 votes
0 answers
261 views

How does Opensea fetch Cryptokitties' metadata?

As far as know CryptoKitties doesn't have metadatas on blockchain, they generating images from kitty's genes. Am I right? But here is the real question: If they don't have metadata on blockchain how ...
Fatih Furkan's user avatar
2 votes
0 answers
402 views

Retrieving contracts metadata given swarm hash file

How can I retrieve the contract's metadata referred by Swarm Source at Etherscan page for this contract? https://etherscan.io/address/0x1f9840a85d5af5bf1d1762f925bdaddc4201f984#code It says the bzzr://...
Saulo Ricci's user avatar
1 vote
1 answer
25 views

How do projects create huge NFT collections?

Working with ERC20 is simple, but when it comes to NFTs, how can I manage bigger collections? For example I wanna launch a collection of 2k NFTs. The problems are: To upload the 2k images (This is ...
Solidity Nerd's user avatar
1 vote
0 answers
13 views

Opensea Metadata Line Break

I'd like to add a line break to my NFT's description, but export const metadata = ["NFT Name", "Hi! \nThis is my NFT"]; \n would straight up not show break and not show metadata. ...
antuK3n's user avatar
  • 11
1 vote
0 answers
40 views

does opensea treats differently ERC721 and ERC721URIStorage? What about using pinata vs custom IPFS server?

I developed a contract and uploaded it to the polygon chain. I wanted to use my own IPFS node to be as "decentralized as possible", so I used URIStorage. It costs more gas but because in ...
Erik Skibinsky's user avatar
1 vote
1 answer
980 views

Upload metadata as JSON to IPFS

I am uploading NFT-metadata files to the IPFS using Pinata-API and axios: var metadata = { "title": "Asset Metadata", "type": "object", &...
Luex's user avatar
  • 61
1 vote
0 answers
248 views

Extracting metadata from IPFS URI in contract

I have the IPFS URI that contains the metadata of an NFT. I need to access attributes from the metadata inside the smart contract. How would I go about doing that? I've tried using provable api 0.5 ...
zerb's user avatar
  • 31
1 vote
1 answer
129 views

There is a way to implement a breed system with a ERC-721 on IPFS?

I'm having a question on how can works a Breed System on ERC-721. What I know I understand well who to make a smart contract with limited supply and how to import all images and metadata to IPFS ...
Arthur's user avatar
  • 194
1 vote
0 answers
226 views

User side metadata reveals for ERC-721 tokens

I'm helping a friend create a project where the project slowly mints and reveals over time. What's the best way to ensure no metadata is leaked? Here's how it'll work user mints a NFT, user calls a ...
kmao's user avatar
  • 21
1 vote
0 answers
337 views

Two metadata hashes at the end of the bytecoe

doing my own research i saw that the metadata hash is added to the end of the bytecode and i can extract and decode it with cbor. I know that we can identify them by different ways, in this case with ...
Víctor Hernández's user avatar
1 vote
1 answer
145 views

MIgrate a NFT to IPFS after minting?

Hi I would like to know if it is possible to migrate my NFT from a standard webserver to IPFS after minting it? I already generated and minted my NFTs and now I would like to call the basetokeURI and ...
Lorenzo's user avatar
  • 11
1 vote
1 answer
1k views

How to fix "Unidentified Contract" on metamask NFT viewer

I've deployed a few ERC721s to ethereum and polygon, but they all show as "Unidentified Contract" in the mobile metamask nft tab. I feel dumb for not being able to figure out why - any ...
Jim Rubenstein's user avatar
0 votes
0 answers
32 views

Efficient Storage Strategies for ERC721 with Editable Content

I'm just starting to learn about smart contracts, Ethereum and NFTs. It's all new and I need your help with managing editable NFTs. I want to create a NFT with content that is easy to modify while ...
user9541033's user avatar
0 votes
1 answer
107 views

NFT metadata for property ownership ERC721 token

Hey everyone I'm new to NFT development and I'm trying to develop a simple property ownership and marketplace using the ERC721 token standard. since I'm so unfamiliar with json I have some problems ...
emtothed's user avatar
0 votes
0 answers
42 views

Do ERC721 BatchMetadataUpdate token ranges have to be consecutive token ID numbers?

I am implementing a ERC721 contract with NFT metadata on-chain and will have a function that can update the metadata if needed. Therefore I would like to emit the BatchMetadataUpdate event after this ...
Vince Reid's user avatar
0 votes
0 answers
71 views

ERC721 Smart Contract: Best Strategy for Handling Token Metadata when Minting Partially with IPFS Storage

I would like to create a ERC721 contract for a situation in which I don't have all the tokens ready upfront. Let say I would like to mint 100 tokens but I have only 10 at the moment of deploying the ...
Iván's user avatar
  • 181
0 votes
1 answer
110 views

Can Opensea pull and read standard metadata URI from ERC1155 NFT?

For example https://token-cdn-domain/{id}.json. Can Opensea and other similar clients read this kind of metadata link? Or I should override the uri() function like this function uri(uint256 _tokenId) ...
dtnwen's user avatar
  • 33
0 votes
1 answer
62 views

Missing Metadata Files

When uploading the metadata & images to IPFS, some files(json) and images (png) were deleted from the initial file upload due to poor art output. Example: 100 NFTs Deleted: 3, 17, 88 Uploaded: 97 ...
Still_Learning's user avatar
0 votes
1 answer
103 views

How to setup metadata on IPFS for newly generated metadata?

I've been studying on how devs usually go about handling the metadata for NFT collections and from what I've seen, this reply on this post sums up the whole process: Best way to set metadata in ERC721 ...
Rohac's user avatar
  • 1
0 votes
0 answers
328 views

Metadata not showing up in opensea testnet

I have encountered a very annoying problem for me. OpenSea and LooksRare (testnets) don't want to display my nft metadata. I'll attach pictures below. Contract constructor: Deploy script: Metadata: ...
MetaverseM4ster's user avatar
0 votes
2 answers
3k views

How do I download an entire NFT collection, including metadata

I want to download an entire collection, including the metadata. Any help would be appreciated.
Raamiana's user avatar
0 votes
1 answer
226 views

How to Use 2 NFTS metadata to create a new NFT (Breed) with Metadata JSON that they choose from the 2 NFTs

How to Use 2 NFTS metadata to create a new NFT (Breed) with Metadata JSON that they choose from the 2 NFTs.
new programmer's user avatar
0 votes
0 answers
148 views

What's the most efficient way to generate metadata for lots of non-generative NFTs?

I know that there are tutorials to generate metadata as part of generative art (i.e. layered art for example using the Hashlips Engine), but what about for art that isn't generated by layering traits ...
gboxentertainment's user avatar
0 votes
0 answers
259 views

Help with Metadata not working

I've been playing with trying to mint NFTs partly for my own learning, and partly because I'd like to NFT my company's public memos/docs to make accountability to my investors as easy as pointing to a ...
Dananddog's user avatar
0 votes
1 answer
58 views

Transaction History/ Metada of NFT'S on Etherum blockchain

Currently I am working on project and I want to detect different frauds about NFT's, so I need the transaction history of NFT's and NFT related events. I want to compare different marketplaces and ...
max's user avatar
  • 1
0 votes
1 answer
202 views

Where is 'uint256[] memory tokenTraits' defined in this NFT contract?

I'm looking into NFT contracts and I am analyzing the infamous CREEPZ INVASION GROUNDS contract. Viewable at https://etherscan.io/address/0xc3503192343eae4b435e4a1211c5d28bf6f6a696#code On line 307 of ...
RustBucket45's user avatar
0 votes
1 answer
58 views

Changung the metadata of an NFT i own

Is it possible for me to change the metadata of an nft that i own but am not the creator of? Like can i change the image it is linked to and the attributes along with then freezing the metadata?
gshea's user avatar
  • 1
0 votes
0 answers
474 views

Token URI not found on Opensea

I ran brownie run scripts/rizer_incept/set_tokenuri.py --network rinkeby and I got this error TransactionError: Tx dropped without known replacement: ...
ChristianOConnor's user avatar