Questions tagged [meta-data]

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How does explorer get tokenURI?

Is there a standard method that blockchain explorers will retrieve tokenURI? the only potential thing I found in a limited search was _baseURI function I'm currently using function tokenURI(uint256 ...
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1 answer
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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/...
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2 answers
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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"/&...
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Editing TokenURI/BaseURI for User Metadata Change

I am doing some research into editable metadata. In my case, this is as simple as having a second URI string and allowing it to be toggled between two possibilities based on a mapping value. If I was ...
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29 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 ...
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Choosing the best tool to upload NFT metadata on IPFS

I am working on an NFT creation user interface. I have recently encountered a crucial situation where I need to choose between the available tools to utilize the most efficient one to host my NFT ...
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2 answers
29 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 ...
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56 views

Updating Metadata in Opensea

I am trying with updating the metadata listed in opensea. WHen I tried from their UI, metadata is updating succesfully. But when I used https://testnets-api.opensea.io/api/v1/asset/...
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Why doesn't a token that belongs to an upgradeable contract get upgraded on opensea?

I upgraded a contract and thereby added a contractURI function to a contract on Goerli, and calling the function returns the URI, but the test NFT on Opensea still doesn't have any of the contract ...
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20 views

Claim. How to allow claiming nft tokens only to owners of certain metadata

I'm writing the nft smart contract with claim function. The main idea: If the user who owns the nft token of the first collection has certain metadata, then he gets access to the second collection. My ...
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1 answer
97 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 ...
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1 answer
88 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 ...
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1 vote
1 answer
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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 { ...
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1 answer
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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 ...
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35 views

OnChain metadata are not displayed

I made an ERC721 contract with on-chain metadata (see here). The tokenURI method returns the metadata in this format: data:application/json;base64,...
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1 vote
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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 ...
1 vote
2 answers
43 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....
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0 answers
39 views

Metadata Not Loading

Hi so I was doing one of the tasks for Alchemy's RoadToWeb3 and my metadata is not loading, even though I checked my json and solidity, which is all working fine. I have been waiting for the past 6 ...
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0 answers
95 views

How to upload large amounts of data to IPFS

I'm trying to upload a 30.4 GB folder via Pinata service. The problem is that Pinata has a limit of 25 GB per download (I have bought Picnic plan for 50 GB). Tried the free service NFT Storage(The ...
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13 views

Tiered Membership NFT using onchain or off chain metadata

I'm building a tiered membership nft contract for a DAO. What would be the best practice regarding the metadata: onchain or off chain? The biggest disadvantage of putting it on chain would be the ...
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160 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: ...
1 vote
2 answers
2k 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
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Can the supply number of a decentralised immutable ERC-115 token still be modified?

I have minted four 1/1 ERC-115 NFTs on OpenSea, and want to freeze them, sending their metadata to IPFS, in order to 'decentralise' their metadata. I would have preferred to mint these 1/1 NFTs as ERC-...
1 vote
1 answer
129 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 ...
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1 answer
1k 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.
0 votes
1 answer
133 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.
0 votes
1 answer
322 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 ...
1 vote
1 answer
751 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", &...
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1 vote
3 answers
601 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 ...
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1 answer
25 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?
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0 answers
28 views

how can I put a URL in the image section of the metadata?

I have this sandbox character(https://www.sandbox.game/model-viewer-light/?assetId=9894bf84-cc8e-455b-a4aa-e3a3f2955045), and I want to create an nft meatdata and use this link for the image part ...
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0 answers
39 views

What's the proper way to update your metadata?

I'm trying to build NFT game where I'm going to upgrade NFTs attributes based on in-game activity achievements, I've googled around, but couldn't find a solution, so my question is how can I make ...
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1 answer
560 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 ...
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0 answers
95 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 ...
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0 answers
22 views

MetaData won't show

I've been trying to deploy this contract for 3 weeks and I just can't seem to get anything to show up on opensea. I can't figure out what i'm doing wrong here. Can anyone assist? https://testnets....
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100 views

ERC-721 Solidity Openzeppilin Code Append More NFT Token

I hope I can describe the problem properly. Let's say I have 100 NFT tokens stored in an IPFS storage at some location say, ipfs://abc I have a smart contract ready where I use the constructor to set ...
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1 answer
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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 ...
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198 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
275 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 ...
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0 answers
50 views

FreeCodeCamp Solidity Tutorial (youtube): Not getting a metadata file when deploying an NFT

I'm working through Patrick C's freeCodeCamp solidity tutorial. I'm trying to create an NFT with this python script: from brownie import AdvancedCollectible, network from scripts.helpful_scripts ...
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179 views

how to synchronize on chain data with off chain data (metadata)

"ethereum network" I am currently trying to build a block chain game. I don't know if I understand the nft and opensea correctly. My understanding is: In a contract I can have list of a ...
0 votes
2 answers
766 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 ...
0 votes
1 answer
48 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 ...
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2 votes
1 answer
561 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 ...
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0 answers
339 views

Can't see nft as gif in metmask

I am a developer and I created a smart contract for a project that is currently live. the thing is on opensea I can see the gif because I used "animation_url" in the metadata but on metamask,...
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0 answers
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Creating an NFT that is configurable by it's owner

I wish to create an NFT that may have an image that shouldn't be changed, but another field in the metadata should be changed by it's owner. Is that even possible? Thanks..!
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How to provide metadata to smartcontract to implement metadata specific functionalities

I have a NFT collection with 3 different categories. Plants, animals and humans. In the metadata i have put the category of the image but i also know it based on the tokenId (tokenid.json, tokenid.png)...
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32 views

Token id increment in name metadata by minting

i have a NFT project that has a hidden n reveal function. When the nft is hidden, i want to have in the name the token id beside the name like "Cool cats #1, cool cats #2, cool cats #3, cool cats ...
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1 answer
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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 ...
1 vote
0 answers
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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 ...
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