Questions tagged [nft]

Questions about NFTs, non-fungible tokens.

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How to use a placeholder image during minting, and then only updating metadata with the actual URI after minting?

As per the title. I want to be able to have a placeholder image for my NFTs, something like this: https://opensea.io/collection/thealcabones Then subsequently, after launch, I then update the metadata....
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5 votes
1 answer
382 views

How would an nft marketplace structure their smart contracts to pay out "creator shares"?

This may be a noob question, but does any know how a market like Nifty or any similar nft marketplace actually implement paying a "creator share" or royalty back to the original creator ...
4 votes
0 answers
76 views

Metadata not showing on opensea

I have a problem with a simple nft program i did in order to learn more about ERC721. this is the code: // SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/contracts/...
4 votes
2 answers
228 views

How do you prove ownership of a digital asset with NFTs?

I have a few questions regarding NFTs. Every source I find online roughly says that an NFT is a blockchain-stored ownership certificate for a certain digital asset. But I don't understand how that ...
4 votes
0 answers
892 views

What is the difference between ERC-2665 and what is proposed in EIP-2981? Royalties vs Transfer Fee

There is an EIP for Royalty standards. But there is already a ERC for a Transfer Fee Could ERC-2665 be used to implement royalties across all market places for NFT? What is the difference between ...
3 votes
1 answer
371 views

Managing NFT Royalties Across Marketplaces?

I am working on my first NFT project so sorry if this is a newbie question. I want to deploy my smart contract independently then allow the tokens to be sold on any marketplace platform. The goal is ...
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3 votes
0 answers
196 views

Customized Lazy minting NFTs on OpenSea

Is it possible to implement customized lazy minting NFTs from scratch, and list them on OpenSea? I know that there are public smart contracts to lazy mint, but I'm not sure whether they can be listed ...
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3 votes
1 answer
2k views

How to set a max supply of an ERC-721 token?

I am using the OpenZeppelin framework and I've tried to find solutions on how to put a max supply of an ERC-721. The only answers I've found seems unnecessary complex and I haven't been able to make ...
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3 votes
0 answers
431 views

Creating an Automatic NFT trader

(Apologies for keeping the questions so broad but not sure of the starting point at this stage) Hi All, I am trying to build an automatic NFT trader where a smart contract will buy the NFT from ...
3 votes
0 answers
2k views

Gas Fees for 10k NFT

I want to mint a collection of 10,000 NFTs. However, gas costs are an unknown. I was wondering if someone could help me understand the following: If I programmatically mint NFTs on the mainnet for ...
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3 votes
1 answer
104 views

ERC721 "NFT" with ImageURL[] instead of single ImageURL

I am looking to create algorithmic NFT's that are built from multiple images. Rather than layering the images for all combinations and then storing all permutations I'd like to send an array of image ...
3 votes
0 answers
463 views

Import NFTs data from Metamask

Goal: Sign in to the server with Metamask (done), import information to the server about NFTs from a wallet (not done) to our platform (trading platform similar to Opensea). Problem: Metamask uses ...
3 votes
2 answers
714 views

OpenSea to ERC 721 (NFTs)

I'm a mere mortal in the coding world (e.g. a complete noob). I'm an NFT artist that has an increasingly popular collection on OpenSea. The collections on OpenSea, however, uses a system called 'Lazy ...
3 votes
1 answer
235 views

deploying a simple ERC721 contract: transaction could not be decoded: could not recover secp256k1 key: calculated Rx is larger than curve P

You can check out the code here: https://github.com/lopeselio/Chainlink-VH-DynamicNFT Command: truffle migrate --reset --network rinkeby -f 3 Then response is as follows: Compiling your contracts... =...
3 votes
1 answer
108 views

how do I know that NFT is from the right person

I understand the NFT (at least solidity part).. There's something that's bugging me though. Let's say someone made a super great cat(cat1), published it to ipfs, then called the ERC721 contract and ...
3 votes
0 answers
716 views

Safe implementation on Solidity 0.8.0 of a withdrawal and a refund

I'm here for asking of a SECURE way to implement on solidity 0.8.0 two functions: 1-Withdrawal() which sends all the ether of the smart contract to the owner address. My current implementation is: //...
3 votes
1 answer
555 views

Temporarily ownership and Revokable ownership of NFT

Is NFTs(ERC721 or ERC1155) allow to "temporarily own by an address" and the issuer can "cancel ownership of NFT of the address" or "directly assign it to a new address without ...
2 votes
1 answer
224 views

Keepers with VRF Error "Callback gas limit set too low error"

Im trying to create a dynamic nft by following the tutorial by alchemy, the NFT should update when performUpkeep is called which should get a random number using VRF v2 and change the NFT token URI. ...
2 votes
0 answers
151 views

How an ERC721 contract can be sold on multiple markets?

I'm trying to build an NFT market where you can put your existing ERC721 contract tokens on sale. My workflow is like this: Token owner comes to marketplace, puts a token to sale by giving the ...
2 votes
0 answers
225 views

What happens to an ENS domain NFT in my wallet after its expire date + grace period If I don't renew it?

What happens to an ENS domain NFT in my wallet after its expire date + grace period If I don't renew it? Will it be still be in the wallet or will it self-destruct?
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2 votes
0 answers
2k views

How to find the "slug" of a NFT collection posted on opensea using the contract address?

The opensea api uses collection "slugs" in their get requests to identify collections, however, I don't see an easy way to find these "slugs". I know that you can enter the page of ...
2 votes
1 answer
649 views

How to mint one or more randomly selected token ids on ERC1155 using Chainlink VRF?

I'm looking to have an ERC1155 smart contract with a set number of tokens, each with their own max supply, and when a user mints it selects randomly from the available tokens. Creating the 5 tokens (...
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2 votes
0 answers
778 views

Transfer an NFT token from Polygon to Ethereum - Solidity smart contract

I am new to blockchain development, NFT and Solidity and i need your help. I have fount this twit and this Polygon documentation Most of the assets are pre-existing on Ethereum chain. But new assets ...
2 votes
1 answer
616 views

Which contract does Opensea uses for polygon mumbai?

I've been testing buying NFT on Opensea. I've bought nft on rinkeby, which will trigger AtomicMatch of the underlying wyvern exchange contract. However, after I've done the same thing for Opensea ...
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2 votes
0 answers
196 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 ...
2 votes
0 answers
649 views

How to mint NFT in bulk?

If you have around a 1000 NFTs and want to list all those on opensea do you have to pay gas fee for every single one of those to be listed ? Or is it more like that you "upload" you NFT work ...
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2 votes
1 answer
38 views

How can I determine if an "NFT" I purchased was issued with an ERC20 token or ERC721 token?

I am trying to determine if the NFT I own is an ERC20 token, or what it should be, an ERC721 token. Here is the link to the contract and the link to the source code. It's on the C chain of Avalanche ...
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2 votes
0 answers
138 views

Hardhat and Ethers.js Mint Slow with 25 RPC Requests Per Minted Token

We've successfully deployed an ERC-721 contract to testnet and mainnet BSC, but when calling our Mint function, followed by a contract.tokenURI(tokenId) call, the request times are quite long, and we ...
2 votes
1 answer
350 views

How to see all the minted nfts and the owner addresses during development?

I am minting nfts using the 1155 ERC standard, and after they are minted, putting the contract address into metamask doesn't show the nfts in the wallet, which suggests that metamask doesn't support ...
2 votes
2 answers
577 views

How can verify an NFT that I want to act as an access card?

Hey guys I'm trying to create a social group that has real world and cyber space meet ups. I wanted the group to each have an edition of a NFT that I create and they get. When at these events how ...
2 votes
0 answers
1k views

Does "on demand" lazy minting of NFT's hinder the original creator from proving their origin?

From my brief time trying to understand the various tools and tech available for NFT's, I stumbled on the area of lazy minting; but with the seemingly few sources of information on the topic (the main ...
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2 votes
1 answer
2k views

ImportError: cannot import name 'Accounts' from 'brownie.network.account'

Setup MacOS Catalina v10.15.6 IntelliJ Ultimate v2020.1.1 Python v3.7 eth-brownie v1.14.6 Ganache CLI v6.12.2 I created a VENV using my Python 3.7. Following Patricks tutorial, I have installed eth-...
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2 votes
0 answers
106 views

What are the factors involved in NFT gas consumption?

After reading this article ("The Unreasonable Ecological Cost of #CryptoArt" Part 1, Part 2), I'm keen to better understand what are the factors involved in energy consumption by NFTs. The ...
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2 votes
4 answers
273 views

NFTs and artificial scarcity

Apologies if this isn’t the right forum. Just trying to understand the concept of scarcity with NFTs. With physical goods, there is tangible scarcity. For instance, there are only a certain amount of ...
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2 votes
0 answers
61 views

Sign an NFT asset with an Ethereum address

Is it available an Ethereum application that allow the owner to let "sign" his NFT asset by other addresses? If not would it be possible to develop it?
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2 votes
1 answer
77 views

Are there any NFT marketplaces that accept non-media or even arbitrary file formats?

I am curious as to whether there are NFT marketplaces that allow minting tokens for arbitrary file formats say pdfs, text files, etc .
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2 votes
1 answer
136 views

How do I allow the current owner an NFT to append 8 bytes to the token?

How would I allow the current owner of an NFT to append a fixed number of metadata bytes to their token on chain. Is this something that can be done with ERC-1155 or ERC-721. Or is this a whole new ...
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2 votes
0 answers
80 views

How to prevent NFT or Enjin Token copying?

So lets say someone mints an Enjin token pointing to a 3D model asset for a game. What prevents someone from downloading that same exact 3D model, and minting a new token that points to it? Are the ...
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2 votes
0 answers
115 views

Marketplace that only accepts first-party NFTs to be sold

There are two contracts: ERC721 NFT contract (enables minting, etc) Marketplace contract (has a sell function and buy function) When somebody calls the function to put a NFT for sale in the ...
2 votes
0 answers
361 views

Possession vs Title vs Ownership in NFTs

Is there a way to separate possession from title in an NFT smart contract? I'm not sure these are the best terms, but here are some examples: Renting out NFTs, say for use in a game. The rental is ...
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2 votes
0 answers
281 views

Are ERC-1155 tokens always atomic?

I am creating an ERC-1155 smart contract whereby I create a number of different tokens and also want to be able to create new tokens on the fly. The code is something like: import "@openzeppelin/...
2 votes
4 answers
3k views

Can an NFT (e.g. ERC721) simultaneously belong to two different entities, say an user Owner, as well as a user Custodian?

For example, on the blockchain say you own a ERC721 Car token at your wallet address, but you want to park it in the ERC998ERC721 top down composable Garage owned by your friend, while still retaining ...
1 vote
0 answers
9 views

Minting 3D files onto opensea

I am new and I am building an NFT collection on Open Sea for my personal project. I have watched a couple of videos from Alchemy, the ERC721 smart contract video outlined how to upload and host files ...
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1 vote
2 answers
22 views

What is the right way to create multiple NFT collections?

I'm creating a platform where users can mint their own NFT collections, can you tell me the best way to do this? Do I create a contract just to store the collections and tokens, or whenever the user ...
1 vote
0 answers
23 views

how to Mint a NFT to a PDA account directly on Solana?

I'm a Ethereum dev, started solana development recently finding it bit confuse due to my previous Eth concepts. I'm developing a NFT marketplace on solana and its a type of P2E model. In Ethereum you ...
1 vote
0 answers
11 views

Safety of writing fund transfer and NFT transfer code in an externally linked library

If suppose there is a main contract A that is linked to an external library L, would it be safe to move all the fund transfer and NFT transfer calls from the main contract into the library to reduce ...
1 vote
1 answer
21 views

The simplest way to tokenise NFT into 1 million pieces?

Does exactly what says on the tin. I have an NFT worth 1 million dollars and I would like to offer 1 million pieces.
1 vote
2 answers
14 views

What's the relationship between smart contract and NFT collections?

I am new to web3 and block chain. I have learned that NFTs are just the tokens stored in a smart contract. But then I see another concept -- NFT Collections. I really wonder what's the relationship ...
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1 vote
1 answer
30 views

How to build an API that returns the metadata of an NFT directly by querying the Ethereum blockchain?

the title is my question. I really want to know how these third party APIs like Alchemy, Moralis are working I'm building a product and need to create an API which can directly query the Ethereum ...
1 vote
0 answers
29 views

Get NFT Token Price

I'm using JavaScript, and trying to obtain an individual token price from a platform like OpenSea, without using the OpenSea API. Popular SDKs like Alchemy and Moralis can return the floor price, or ...

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