Questions tagged [nft]

Questions about NFTs, non-fungible tokens.

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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 ...
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11 views

contract to mint tokens on Rarible

Is it possible that we have a contract that allows the user to mint contracts directly on rarible. If so, please guide how will this be accomplished. I want to mint erc-721 and erc-1155 tokens.
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9 views

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 Web3.js v1.3.5 my truffle-config file const HDWalletProvider = require('@truffle/hdwallet-provider'); require('dotenv')....
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1answer
13 views

How to fractionalize ownership of a collection of NFTs across multiple investors?

An Ether wallet contains a large collection of ERC-721 NFTs. Normally only one owner knows the seed phrase for a wallet and therefore is the owner of all the NFTs inside the wallet. How can such a ...
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12 views

Dropped transaction from opensea [closed]

I sold NFT on opensea. NFT came to the buyer but ETH transaction is dropped. What does it mean how to slove it? Thanks
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What happens when you 'create' an item on the OpenSea app?

Very noobie here. I'm sorry, Does anybody know what happens on OpenSea when you actually CREATE an item? I know it doesn't mint one but what it does? (As it signs a transaction tho). I've been trying ...
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19 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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23 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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How come I could spend 1.5 WETH, even though I only wrapped 1 ETH?

On opensea, I converted (wrapped) 1 ETH to 1 WETH, which is equal to 2 x 0.5 WETH = 1 WETH. I then spent 0.5 WETH on 3 items = 1.5 WETH, which is greater than the amount I had. how is this even ...
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28 views

How does one prove NFT ownership? [duplicate]

I've been hearing a lot about nft and I understand some fundamentals, though I am not 100% clear how would one prove ownership of an NFT token. Does proving NFT ownership requires to pay gas fees?
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1answer
27 views

How to effectively use the metadata of ERC721

When you store a URL as the metadata of ERC721, does that defeat the purpose of the immutability aspect of a blockchain, since the content that URL is pointing to can be modified? How do I effectively ...
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1answer
13 views

What is the significance of the function keccak256(abi.encode(to, ids))

I have seen a Solidity smart contract made by Polkamon, which is used to store NFT hashes, so that users can create an NFT without minting it, so that they can save Gas fees if they don't like their ...
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1answer
30 views

Why BSC is used more in DeFi apps? [closed]

I decided to deploy my NFT collectibles in BSC (Binance Smart Chain) because of Gas Prices in Ethereum blockchain. So, I researched some Dapps deployed in BSC. I've found that most of the applications ...
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32 views

How are NFTs traceable?

I'm trying to understand some of the finer points of NFTs. What makes NFTs traceable? Is it the transaction history stored on the ledger? Is there anything else to it? Key to the NFT's traceability is ...
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1answer
23 views

Is there ERC721 decimals?

Is it possible to have decimals balances in ERC721 ? I mean is it possible to say i own 50% of an NFT for example ? Thanks
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1answer
19 views

How to have copies of a NFT with different metadata under the same contract

I want to mint different copies of a NFT, for the copy with id 0 has the metadata A and the one with the id 1 has the metadata B, and so on, I want these minted copies to be part of the same NFT ...
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5 views

generate signmessage in python web3

I am learning solidity NFT, I am trying to generate v, r ,s using python web3 require(owner() == ecrecover(keccak256(abi.encodePacked(this, tokenId)), v, r, s), "owner should sign tokenId"); ...
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Deploy a contract (factory) with web3 based on the connected wallet?

A big newbie into solidity here. I’ve managed to compile and deploy (with truffle) a ContractFactory from OpenSea repository. Long story short the part with the deployment is this if (...
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1answer
23 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
47 views

Question about NFT metadata

I require a bit of help regarding NFTs. Can someone please fact check my understanding of how NFTs work, and answer a question about how NFTs are accessed? I have one big question about what is stored ...
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1answer
13 views

What is the best way to download all NFTs data

Mb someone knows what is the best way to download all NFTs data(uri) from contract?? I try to use filter on minting event but I need to do N iterations, because infura or web3 has limitation of 10k ...
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1answer
24 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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8 views

Should my application be decentralized? (Basic Question)

I know this is a seemingly basic question, but one that I have not found many solid answers to. I have been programming for a few years now and with the recent NFT boom, DApps have caught my interest. ...
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EIP1155 token specific URI's

For EIP1155 standard the current implementation means you are supposed to have 1 base uri and then the metadata for the token is inferred from the tokens ID. Example of such a URI: https://token-cdn-...
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2answers
34 views

Are NFTs (technically, the smart contracts) stateless or stateful?

Are the smart contracts used to manage NFTs stateless or stateful? Ethereum as a protocol seems to be stateful, but the smart contracts for NFT marketplaces seem to be stateless. They don't save any ...
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26 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
23 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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14 views

How can i pause the token transfer of specific tokenid only in openzeppelin ERC721 contracts?

I want to lock the transfer of specific tokenId of ERC721 Tokens owned by EOA for specific amount of time. Is it possible to achieve that?
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1answer
150 views

How can I verify ownership to allow resale of NFTs?

I have discovered NFTs and ETH recently and would like to build a marketplace like opensea but allows resale of NFTs that are already minted on various block chains(ETH, FLOW). Starting with just ETH, ...
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20 views

Apply fees when sending an NFT to another wallet

I want to create a NFT with solidity. There are builtins functions in ERC721 which allows me to transfer a NFT to another wallet. Here is what i want to do: I want to apply Ethereum fees when an NFT ...
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11 views

NFT ownership with different percentage

is it possible for 2 owners to own an NFT but one of them will have 70% and the other 30% for example, or the ownership has to be equally given? thanks
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14 views

Distribution of tokens right away after ERC20.transferFrom

I would like to ask a question about token distribution with overriding ERC20 transferFrom function. IERC20 Token; function buy(uint256 id) external onlyCardPayable(id, PaymentTypes....
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7 views

Signer Address Recovery

I have these 2 functions in my contract with help of which I want to recover the address of the signer: function formSigningData(address NFTAddress, uint NFTId, uint amount, address tokenAddress, uint ...
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2answers
27 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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36 views

How can I get the public adress of a NFT on rarible?

1 - How can I get the public address of a NFT on rarible with ETH Block Scanner? Lets assume we got the url (or even the address? of the NFT (does each NFT have a unique ETH address? Where do I find ...
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0answers
43 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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2answers
54 views

i would like to create 60GB video NFT, is it possible?

Is it a matter of price? I would like to know what is the process to do that. Thanks a lot
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0answers
15 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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1answer
61 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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22 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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15 views

Can I Sell Original Scientific Exercises as a Non Fungible Token and Where?

Hello i know some stuff of science and sometimes my brain create real world problems question, real problems answers for example here: physics laws and body dimensions in football dynamics and here: ...
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1answer
89 views

I minted an NFT by mistake while in Rinkeby Test net on my wallet, the NFT sold for 1eth now it’s in my test wallet how do I recover this ETH?

This is the details of the transfer Buyer my1703 Transaction hash 0x5438b317f970448a040bba32b89c1e2c4ae306943764193a19d7e65739ae2283 You earned 1.007224 ETH Type of transaction Purchase Time sent Sun ...
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14 views

ERC-1155 safeTransferFrom() issue: contract doesn't have permission to send tokens from itself

I have a function in an ERC1155 contract that looks like this: function foo(uint _id, uint _amm) external{ safeTransferFrom(address(this), msg.sender, _id, _amm, ""); } Assume the ...
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10 views

Nft if underlying item gets sold

Suppose my friend has a 'Mona lisa', perhaps a simpler painting worth about 1 million. He decides to create an NFT for it, and after authentication someone buys it for 100k. Now he sells the painting ...
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2answers
81 views

Given an ETH wallet address - Fetch all ERC721 tokens currently owned

I would like to create an application that - given a specific wallet address - fetches and displays all NFTs/ERC721 tokens currently owned. How can this be accomplished? Are there any examples ...
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0answers
32 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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2answers
95 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
34 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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1answer
41 views

How to have the contract check if the msg.sender currently owns a specific token. (erc721)

Assuming I have a contract to mint my own NFTs: (I'm thinking ERC-721, but not necessarily). I want to create another smart contract that before doing anything, verifies that the address interacting ...
3
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1answer
122 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... =...