Questions tagged [nft]

Questions about NFTs, non-fungible tokens.

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87 views

Is it possible to unmint an NFT? as in, is the reversal of the tokenisation process feasible?

Recently an artist friend of mine got scammed on Rarible. The Scammers put up his original artwork for a reserve price after minting 22 copies of which 2 were sold. My friend came to know of this ...
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1answer
40 views

Why does this stuck transaction not appear on etherscan?

Can anyone help? I have a stuck transaction in my Coinbase Wallet. Its status is marked as "Pending", and this has been the case for about 10 days now. After doing some research, I've ...
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1answer
18 views

How can I find NFTS and their metadata?

I’m new to Ethereum, and I’m working on a side project I’m curious How can I discover every NFT on the Ethereum blockchain? Once I’ve identified the NFT, how do I fetch the metadata?
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190 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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how can i move my NFT from localhost to Rinkeby test network

i have made some NFT's on a local host using ngrok and ganache and i wish to move them to Rinkeby test network so i can publish them on marketplaces, is it possible or is there another way to do so? ...
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1answer
335 views

Can't see my NFT in Coinbase Wallet on Ropsten

I have created the following ERC721 contract: pragma solidity ^0.6.0; import "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721PausableUpgradeable.sol"; import "@openzeppelin/...
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2answers
589 views

How can I get a list of all owners of an ERC1155 NFT by using a web3 call?

With ERC721, there's the 'ownerOf' function that takes a non-fungible token's id and returns the owner address, but ERC1155 doesn't officially require that a function like that be implemented. I made ...
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1answer
48 views

Error: Non-hexadecimal digit found

I seem to be running the following error when I try to run this script: , from brownie import AdvancedCollectible, accounts, network, config def main(): dev = accounts.add(config['wallets']['...
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7 views

Are there any raffle smart contracts and platforms for NFTs?

Instead of smart contracts that do auctions, is there any website or DApp that facilitates smart contracts for raffles? For example, a number of participants submit an entry payment, and the smart ...
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1answer
12 views

Demonstrating the erc1155 data

how can I get the data of my erc1155 on the front/backend? I don't know which libraries and which functions to use? Thank you
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On OpenSea, if buyer makes an offer and seller accepts, does the sale go through?

On OpenSea, if a listing has an offer, will that sale automatically go through (the buyer is charged) once the seller accepts? Or does the buyer at that point have a chance to decline?
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1answer
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approve + safeTransferFrom ERC721 from existing smart contract

I am trying to call ERC721 from another smart contract, while calling function approveAndTransfer ,I am getting "ERC721: transfer caller is not owner nor approved", not sure reason behind it,...
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2answers
170 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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Truffle migrations error: Transaction was not mined within 750 seconds, please make sure your transaction was properly sent

My env Truffle v5.3.1 (core: 5.3.1) Solidity - ^0.8.0 (solc-js) Node v15.11.0 infura (Rinkeby test network) Rinkeby Test wallet has 21 ether my truffle-config file const HDWalletProvider = require('@...
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1answer
20 views

nft market logic

If I want to implement a little NFT marketplace and want users to be able to put items up for sale, and other users to buy those, how should I do that? Do I need to make market contract that gets ...
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17 views

Best Way To Create An NFT Marketplace Payment Gateway

I am looking to create an NFT martketplace. I do not need any direction regarding a smart contract and minting ERC-721's. I've already created and am able to deploy that on a local blockchain. What I'...
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1answer
30 views

How is the ERC721TokenReceiver.onERC721Received data parameter used in practice?

The ERC-721 and ERC-1155 NFT standards’ safeTransferFrom functions both accept a bytes data parameter which is then passed on unaltered to the transfer recipient address if this is a smart contract. ...
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14 views

NFT wallet transfer pending on ETH but succeeded on Matic?

Wondering if anyone can advise me on the below... I transferred inventory from my Matic wallet to my Ethereum wallet on Arkane Network. There were two separate NFT's and the Matic transaction history ...
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40 views

Pricing in ERC721 tokens [closed]

Can the price of an ERC721 token be handled in the contract itself? Maybe along a fixed curve or something. Can you point me to a simple implementation example of an ERC721 marketplace? Thank you
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1answer
106 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 ...
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8 views

Why does listing NFTs cost more than bidding on NFTs?

In the link below are current gas fees for doing contract interactions on two popular NFT platforms https://gas.metasync.app/ Why does it cost so much more to list an NFT for sale ($150) than it ...
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1answer
14 views

Can ERC721Enumerable.sol provide an address's total set of NFT assets?

Intro: I am trying to use ERC721Enumerable in my NFT contract so I can get the set of all NFTs owned by a particular address. Research: The ERC721Enumerable contract was implemented to enumerate ...
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1answer
17 views

Get token standard type knowing the contract address and tokenId

How can I implement code that returns whether a token is in the ERC721 or ERC1155 standard, knowing both the contract address and the tokenId? What I tried is that I call a function that exists only ...
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1answer
141 views

Enable a download only for an NFT holder?

Could someone enable a download only for an NFT holder? What would be the mechanism for this?
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13 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
18 views

ParserError: while parsing a block mapping

This is the code in my brownie.config.yaml file: # exclude SafeMath when calculating test coverage # https://eth-brownie.readthedocs.io/en/v1.10.3/config.html#exclude_paths reports: ...
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1answer
78 views

What is the best way to handle multiple NFTs of the same collection in ERC1155?

I'm learning ERC1155, and I'm a bit confused. This is OpenZeppelin's example of an ERC1155 Contract: They state that Thor's Hammer is an NFT (because only 1 was minted), while Gold is Fungible. ...
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1answer
31 views

KeyError: 'wallets'

Screenshot of directory: This is the code in my brownie.config.yaml file: reports: exclude_contracts: - SafeMath dependencies: - smartcontractkit/chainlink-brownie-contracts@1.0.2 - ...
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2answers
33 views
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How Can I Add Functionality to my ERC 1155 Token? (If needed) [closed]

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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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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1answer
61 views

Why are all NFTs created from Null Address on Opensea?

When someone mints on NFT on OpenSea using their own wallet as the identity of the creator, why does Null Address always appear in the NFT's transaction history as the creator instead? and then the ...
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21 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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19 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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1answer
39 views

How to find all ERC721 compliant NFTs owned by an address? (Web3 JS)

It is possible to check which address owns a particular NFT by using the ERC721 standard function: function ownerOf(uint256 tokenId) public view virtual override returns (address) in ERC721.sol But I ...
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1answer
132 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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1answer
24 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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53 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 ...
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1answer
27 views

NFT's environmental/computational cost breakdown?

I've read the NFT and mining documentation on the Ethereum website, and I can't wrap my head around two things. If NFT's are not equivalent to Ethereum coins and therefore do not require solving hash ...
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1answer
17 views

How NFT image assets are combined?

How do NFT projects combine their assets with all possible combinations? e.g. Cryptokitties: you have like 10 skin colors, 10 eyes shape ...etc. to combine these assets, you get let's say 10000 ...
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1answer
32 views

How to find the IPFS address of an NFT on SuperRare?

The link to an NFT on SuperRare, an Ethereum-based NFT platform, is shown below. How can I find the IPFS address of the .mp4 file and view the video stand-alone? https://superrare.co/artwork-v2/the-...
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Is IPFS mandatory for NFT

Is it mandatory to use IPFS for file storage and use its hash in metadata for NFT, What if file is stored on s3 and we save its sha256 or md5 in metadata? Hash will be same until file content is ditto,...
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1answer
83 views

How do I get the number of total NFTs issued by an address?

For example Ethereum Name Service (ENS): https://etherscan.io/token/0x57f1887a8bf19b14fc0df6fd9b2acc9af147ea85 I am looking for an API that returns the total number of NFTs created. I'm using ...
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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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58 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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13 views

Selling NFT's, buyer calls minting function, how to call transfer function?

I'm implementing a dApp to sell NFT's. I want the buyer to call the function on my smart contract to mint the NFT so that they pay for the gas fees. However it seems like they can't then transfer that ...
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9 views

Event for nft sold on other platforms

It would be great if anyone could help me out. I am creating an auction website for bidding NFTs. I am stuck at a point where I need to know whether the nft on auction is sold on some other platforms ...
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34 views

Listing NFT on OpenSea via JS API: Failed to extract transfer calldata Error 400

I am trying to use the OpenSea JavaScript API in order to list NFTs for sale automatically. I can't seem to figure out why I keep getting the error Error: API Error 400: ['Failed to extract transfer ...
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9 views

How can we track creator of nft

Hi I'm sorry is there a way to easily track the creator of the nft? Because if it is not possible, then how could I know the nft is genuine and not a copy thank you
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30 views

NFT Id using erc-1155

I am bit confused regarding NFT implementation usng ERC-1155 because of newbie in NFT, by defination, there can be one instance of one NFT, there is one uuid per artwork. But in ERC-1155, I can set X ...