Questions tagged [nft]

Questions about NFTs, non-fungible tokens.

105 questions with no upvoted or accepted answers
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200 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 ...
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124 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 ...
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30 views

Re-entrancy attack explanation and possible fix for specific NFT token - hashmasks

One popular recent NFT project - Hashmasks - Tweeted that some coder called 'samczsun' uncovered a possible re-entrancy attack in their mint function which would have allowed to mint more than the ...
3
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1answer
128 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... =...
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0answers
32 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 ...
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0answers
46 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?
2
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1answer
88 views

How to Fractionalize NFT's (high level)

I have a question to the solidity experts out there. I am Looking into fractionalize NFT's. I was thinking of many different ways of doing it. My first thought was to make a erc-20 market representing ...
2
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1answer
36 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 .
2
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1answer
45 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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0answers
45 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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145 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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95 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: //...
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46 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
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1answer
69 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
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1answer
1k views

See an NFT Token picture in metamask

I have followed step by step this tutorial: https://medium.com/pinata/how-to-build-erc-721-nfts-with-ipfs-e76a21d8f914 Everything works like a charm. I am working on ropsten Network. I have create ...
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0answers
9 views

What are holdings of a Contract?

When I check an NFT on eterscan.io I'm seeing that that contract has many holdings. I think that these are total ERC20 transfers that put in the contract. Probably from NFT consumers like Opensea or ...
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0answers
14 views

NFTs with fractionalized ownership and royalties in perpetuity

Is it possible to code an NFT-compliant smart contract which has the following properties? There are multiple owners instead of just one Royalties are paid out to all owners in perpetuity, across all ...
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0answers
98 views

What is Lazy Minting in Ethereum?

I am trying to create NFTs in various digital/crypto marketplaces like OpenSea, Rarible, etc for the past few weeks. In most of the sites, we need to pay some gas fees for adding an asset and creating ...
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0answers
16 views

tokenByIndex method don't work for contract, how could I get Token Id

I use opensea.io for create nft tokens. I want create 100 tokens and then create redeem mechanism on my site (allow download music). I created contract using: "?enable_supply=true" https://...
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0answers
44 views

Get NFT owner by contract & token Id

I am trying to get the owner of a NFT in solidity & web3 by calling the Contract and the token id In Web3.js-v1.3.5 I've tried this so far, but the result isn't ever calledBack! How can I handle ...
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0answers
26 views

Does unlocking content alter an NFT?

I bought an NFT on Rarible that includes unlockable content. If I unlock the content, will it alter the NFT? If I sell the NFT will the next owner be able to unlock the content? In summary, will ...
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1answer
30 views

How to make buyer of my NFT pay the gas fee for minting?

I want to set up a dApp where i sell create and sell my own NFT's. Is it possible to put the gas fee's onto the buyer so they pay for all the gas? And how would i do that if so?
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36 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 ...
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26 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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1answer
43 views

Custom metadata urls for ERC1155 tokens

I have create a very basic ERC1155 token from this tutorial: https://docs.openzeppelin.com/contracts/3.x/erc1155 // contracts/GameItems.sol // SPDX-License-Identifier: MIT pragma solidity ^0.6.0; ...
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1answer
39 views

How to see value of NFT / ERC 721 token on etherscan?

For instance here https://etherscan.io/token/0x06012c8cf97bead5deae237070f9587f8e7a266d?a=1 is token 1 of CryptoKitties and there are some transfers, but ether value is always set to 0 ether and I ...
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0answers
28 views

Create ERC721 with media file

I want to create an ERC721 smart-contract. The token will be associated to a png file. The users will see there tokens in metamask and i want to display there png files in metamask (this is very ...
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1answer
34 views

How do NFT marketplaces work? (Mostly about authorization of transferring NFTs)

ERC721 says that NFTs can only be transferred by owners/authorized addresses. How are solidity marketplace contracts made to allow a third party address to transfer an NFT from your account to theirs ...
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2answers
30 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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0answers
17 views

NFT (Rarible) double item

I’m new in NFT and Rarible as NFT sell point. I have enter one of my images to sell, but after 2 days of pending signing contract in my Coinbase Wallet, I received message “failed“. I have started ...
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0answers
28 views

How to setup NFT on a marketplace for another person

I have been tasked to set up selling NFT on marketplaces like Opensea etc. The issue is how do I perform all these tasks without getting access to their wallet credentials or private key. The only ...
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35 views

NFTs uniqueness doubt

I am new to the world of NFTs and I find very hard to understand how the ethereum blockchain enforces their "uniqueness". As far as I know, smart contracts implementing the ERC721 interface ...
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0answers
33 views

How do I limit the number of ERC721 NFTs per account?

I would like to restrict the number of NFTs any one address can own. How would you implement this in a Solidity smart contract? Say I have an ERC721 NFT contract, Square.sol: import "../...
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0answers
24 views

Transfer NFT if account lost

I'm a newbie in NFT, ETH and I have a question. Can I transfer NFT if the account was compromised? More precisely, I mean two situations for example: If I author of Digital Art and I sold it. I will ...
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0answers
50 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 ...
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0answers
25 views

How Ethereum NFT Protect Artist Work ( How NFT IMMUTABILITY works on BLOCKCHAIN)?

Hi Guys let discuss how NFT Immutable works on ethereum blockchain I'm new to nft, just created my first one with opensea:) as in image1. My question https://imgur.com/a/KX6TRgi Is my art piece on ...
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0answers
14 views

Who knows what a token collection interface is?

I'm new to blockchain development. I'm reading a tutorial on developing an NFT platform and it talks about a token collection interface. Can anyone explain to me what this is. Let's say you have a ...
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0answers
107 views

How to make a snapshot of ERC-721 (NFT) token holders

What is the best way to create a snapshot of ERC-721 token holders? Maybe there is a tool for this purpose? I need to take a snapshot of holders of tokens for this NFT contract - https://etherscan.io/...
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0answers
20 views

Ethereum NFT options

I am looking at producing a set of NFT's that are a set of 100, the item does not have an image, but is a token to run through an algorithm, I want them to be limited whole NFT's, not ERC-20s. I am ...
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0answers
63 views

ERC1155 per token variables

I want to create an NFT that can mint different character types and multiple clones of each type. The clones within each type will start with same metadata, but each individual token should have its ...
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0answers
76 views

ERC721 `safeTransfer()` chain of events

When examining OpenZeppelin's library of contracts for ERC721 Tokens, you'll find that all tolled, there are literally five flavors of the transfer method, as follows: transferFrom(from, to, tokenId) ...
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32 views

Given just an Etheruem address, is there any way to tell if it's an ERC20 and/or an ERC721

If I have only an Ethereum address and only a locally running node (using a third party such as EtherScan or Alethio is cheating), is there any way to tell if that address is an ERC20 or an ERC721 ...
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3answers
965 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 ...
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1answer
620 views

Using NFT paired to credentials for identity verification

I have a question on the feasibility of pairing a non fungible token (NFT) with credentials for identity verification on the Ethereum blockchain. Can we imagine a scenario where a user would have a ...
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2answers
147 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 ...
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1answer
7 views

Get quick access to assets, events

How do sites like Opensea get all their data so fast? Because getting the data from the blockchain and fetching the tokenURi's takes a lot of time. So I thought they might store all the assets, events,...
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1answer
13 views

How Can I Add Functionality to my ERC 1155 Token? (If needed)

I'd like to create my ERC1155 token to start my crowdsale, but I also want the token to be utilized on my music web app. Allowing for artists to craft their own nfts or buy/sell from each other with ...
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0answers
17 views

Is ERC1155 an overkill if all NFTs are going to be unique?

Within the use-case I'm trying to define an ERC1155 for, I do not foresee to use duplicates for the same token. However, I would like to be able to have this option if such a necessity arises. Is ...
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1answer
20 views

Fetching token metadata from token URI

Is there an efficient way to get the metadatas of a list of token uri's? Like, what if I have a list of 50 token Uris, would the only way be to send a different get request to each url?
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0answers
23 views

Is Unlockable Content in a gifted Opensea NFT safe to open?

If a 10 of 10 edition NFT is sent as a gift to your, and several other peoples', wallets on OpenSea (a custom token engineered by the issuer, and not a well-known NFT platform's token class), is it ...