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3 answers
3k views

Metadata not showing up for ERC-721 OpenSea NFT

I made NFT's, following this tutorial I deployed the smart contract via Remix to my Metamask on the Rinkeby Testnet. OpenSea detected the assets in my wallet after they were minted, but the pictures ...
1 vote
2 answers
128 views

What is the best option for mutable NFTs (ERC721 or ERC1155)?

I am researching on the best option to have mutable metadata for NFTs (ERC721 and ERC1155). What is the best option? Is anybody already using any approach to this? Tableland has just come to my ...
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 ...
0 votes
1 answer
12 views

Opeansea does not preview gltf animations of gltf files stored in ipfs

In theory opeansea supports gltf and gtb files using the animation_url in json file. However they don't render the animation and just display the text of the the gltf file and does not render it (see ...
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.
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 ...
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", &...
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. ...
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 ...
0 votes
1 answer
119 views

Can't see the metadata for my sepolia nft on opensea's testnet or ehterscan testnet

I'm following a tutorial on how to create an ERC721 contract and I've ran into a problem. I can't see the image for an NFT I've minted on Opensea's testnet. none of the metadata will load after almost ...
1 vote
1 answer
58 views

Why is ERC-5185 in "Stagnant" status?

I work for a gaming company and we are looking for options to managing mutable metadata for in-game assets. I would like to use ERC-5185 to implement this. Does anybody know why it is in that status? ...
0 votes
1 answer
102 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 ...
0 votes
1 answer
106 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 ...
0 votes
3 answers
1k views

Reveal NFT image/metadata after mint

I would like to adapt my current contract to include a post mint image/metadata reveal feature. i.e. after an NFT is minted I would only then like the image/metadata to be revealed for that particular ...
1 vote
1 answer
195 views

Returning new {id}.json URI after setting a new URI in ERC1155

I understand that for OpenSea to read our metadata JSON file, we need the function below. function uri(uint256 _tokenid) override public pure returns (string memory) { return string( abi....
0 votes
0 answers
41 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 ...
2 votes
2 answers
401 views

using image_data for opensea's metadata instead of image

I understand it is not recommended, but I was curious about including the code for an SVG in image_data which would replace image per opensea's metadata standards page. This: { "description&...
0 votes
1 answer
13 views

Is there a problem with Pinata Discord Server?

I want to access their server but I am not able to do it. The link they have on their website keeps failing: https://discord.com/invite/pinata. Does anybody have a valid invite I can use?
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 ...
0 votes
1 answer
109 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) ...
2 votes
1 answer
298 views

Is there a tool to verify that the metadata of my NFT is correct?

I am creating a collection of NFTs and I want to test that the metadata and the media files are correct. I am setting tokenURI on chain. How can I do this? I am using Polygon Mumbai.
1 vote
1 answer
328 views

How to avoid user to get metadata from non-minted ERC721 token?

I'm building ERC721 and ERC1155 tokens but I have something I didn't understand.. My Tokens represent characters with attributes, where every attributes have a different rarity. So every character are ...
2 votes
1 answer
2k views

my nft image not showing in opensea testnet

when ever i mint an nft with my frontend dapp and check it on opensea i will just see the name without the nft image. here is my deploy.js file. this is the tutorial i am following https://dev.to/...
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 ...
3 votes
1 answer
1k views

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/...
1 vote
1 answer
221 views

Decreasing size of the images, fetched from IPFS, before rendering

In my project, there is a section where dozens of NFTCards get rendered, including NFT's pictures and other information. Since the quality of those images is high and their sizes are usually too large ...
1 vote
2 answers
677 views

Metadata isnt showing for opensea

Hey so I'm new to nft dev and decided I'll give it a try. I'm following the Hashlips NFT tutorial however it seems I am not getting the same results as him. For some reason the "hidden"/&...
0 votes
2 answers
141 views

search NFT collection by name

i am new to this world of web3. I scrapped opensea.io TOP NFT collections in mongo and now I want to know is there any web3 method that takes NFT name only and returns metadata. My collection in ...
0 votes
1 answer
438 views

How to read ERC-1155 NFT metadata without 'uri()' method implemented

I need to read an ERC-1155 NFT token metadata. The smart contract code does not implement the 'uri()' method. How can we retrieve it's metadata, or at least the metadata's url/URI? The smart contract ...
1 vote
1 answer
330 views

How to create many ERC721 tokens sharing the same metadata tokenURI but different TokenId?

I'm actually trying to create an NFT Marketplace, where a user can upload his NFT (create/mint new NFT) and other users can give some Ether and mint the same NFT. Trying to achieve this with the ...
2 votes
1 answer
32 views

How does Ethereum / the EVM know not to execute metadata/auxdata?

I have a contract as such: // SPDX-License-Identifier: MIT pragma solidity 0.8.15; contract SSimpleStorage { uint256 storedNumber; function storeNumber(uint256 newNumber) external { ...
0 votes
1 answer
250 views

How to decode and update input data of a specific transaction?

So, I've decoded the input-data and fetched it via block-hash, Now what I want to do is that, I want to update the input data and post that updated input data back to the same transaction of the same ...
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 ...
0 votes
2 answers
894 views

Updatable attributes for ERC721 Tokens without touching to immutable rarity attributes

I'm trying to implement an ERC721 smart contract with some NonFungible token. Some attribute will never change, about "layout/traits" composition, and others will evolve like XP. Immutable ...
1 vote
2 answers
70 views

ERC-721 metadata doesn't show up for rinkeby but does show up for mumbai?

This is not rendering despite .tokenURI() returning the correct JSON blob. URI Argument: let metadata = { "description": "Tester", "image": "https://upload....
0 votes
1 answer
1k views

ERC721 Contract: Adding Contract Level Metadata?

I am trying to implement contract level metadata so "description", "image", external_link": etc show up on marketplaces, particularly OpenSea. I have done an extensive search ...
0 votes
0 answers
327 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: ...
2 votes
1 answer
874 views

How to Download Metadata for an ERC721 NFT Collection

As the question states, I'm trying to figure out how to best download all the data for an NFT collection, including images and metadata. Is there a good API to achieve this? Any resources would be ...
1 vote
2 answers
9k views

Updated token metadata not refreshing on OpenSea

I've deployed a contract that lets users mint NFTs, which will have a "coming soon" artwork that will then be updated to reveal the real artwork at a later time. This was due to the fact ...
5 votes
1 answer
2k views

Reveal NFT metadata after buy

We would like to publish our collection on OpenSea, the artwork is done, and would like to do so using Haslips' smart contract. This smart contract already has a similar thing that we are looking for, ...
2 votes
2 answers
5k views

Can I delete, change or add a new metadata?

Suppose I have uploaded metadata + images to IPFS through pinata. Next, I deploy an ERC-721 contract and paste a token URL. The main question is: can I change, delete or add metadata
1 vote
1 answer
217 views

Is it possible to write protect an IPFS base url?

Imaging you have an ERC721 contract with an infinite max supply. Usually, the metadata IPFS url will be the base url concatenated with the token ID: ipfs://[base-url]/[token-id]. Say we are up to ...
0 votes
1 answer
466 views

How to upload NFT Metadata of multiple images after you get base-URI of folder using coding instead of manually doing it?

How to upload NFT Metadata of multiple images after you get base-URI of folder using coding instead of manually doing it ? So, After I upload my Image through Pinata/IPFS, I get a Base-URI. Now I want ...
0 votes
1 answer
225 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.
2 votes
3 answers
784 views

Why metadata is not valid "token_uri": null

I've been testing a smart contract using remix with validated metadata that I have used in one of the NFT smart contracts that I deployed on mainnet and everything worked well, but this time when used ...
0 votes
0 answers
258 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 ...
0 votes
1 answer
29 views

Is it a problem If I keep my nft meta data ipfs link public?

So I have deployed a nft smart contract. And I kept my ipfs metadata address public. Is it a major issue? Should I verify my samart contract?
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 ...
0 votes
1 answer
191 views

What is this CDN in NFT marketplace ? it this the replacement for IPFS.? any leads or links related to the same would be great help

I would like to know what exactly this CDN is? I know that we can deploy and publish the metadata through IPFS. But would like to know the alternatives for it and recently came across this CDN. Since ...
1 vote
1 answer
886 views

How to tell if a transaction is contract creation?

How can one tell if a contract creation took place during a particular transaction? In other words, what is the pattern that I should be looking for? In some cases I have seen the null address being ...