Questions tagged [non-fungible-tokens]

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How to guarantee IPFS file access based on Non Fungible Token ownership (or security)?

The file is too big to be stored on the blockchain, so it is stored on IPFS. Only the person who owns a unique Non Fungible Token (or a Security Token) can access it. Of course I can encrypt the file ...
1
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1answer
52 views

ERC721: Interface ID Registration

Why we need to register Interface ID in ERC721 token. I was just going through the openzeppelin-solidity erc721 code and curious to know that why we need to use this. That interface id register code ...
2
votes
2answers
58 views

Splitting and Merging tokens

i'm here to ask if my project is doable or not. I'm actually reading "Mastering Ethereum" by Andreas M. Antonopoulos, so i have some basic solidity knowledge. I have a project: I have a building, ...
1
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1answer
30 views

add fields to ERC721 tokens, still belongs to the standard?

if starting from the code of an erc721 token, I add fields beside the name, symbol and URI, is it still a token that respects the standard? Add in the contract, not in the JSON file. The most ...
0
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1answer
62 views

ERC721-OpenZeppelin: This contract does not implement all functions and thus cannot be created

I know there are already a lot of topics that deal with the problem but their solutions didn't work for me. this is the code: pragma solidity ^0.5.2; import "https://github.com/OpenZeppelin/...
0
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2answers
20 views

Create token with address and fields

I would like to know if it is possible to create tokens that have a different address or id for each one. I need to create a series of "objects" with the same structure but with the values of ...
0
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1answer
78 views

STO using Ethereum

Is anyone here worked on STO using various ERC protocols. Need to get some information about it. Regards, Divansh
1
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2answers
178 views

ERC721 - Create 1000 tokens in one function call

I have implemented a contract where a set of ERC721 tokens should be generated with a function call in private net. Code as follows : function mint( address _owner, uint256[] _id ) ...
1
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1answer
183 views

How to ERC721 token using external contract to msg.sender?

I have Caller and ERC721 contract just like this : contract SampleToken is ERC721MetadataMintable { string private name; string private symbol; constructor (address _creator, string _name,...
3
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2answers
159 views

Ethereum implementation of a non-fungible but divisible token? (ERC721 seems not to work for that)

I am struggling currently with finding the right implementation possibility for a token with the following properties: Asset-backed token based on a non-fungible asset (like a piece of art) More than ...
1
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1answer
267 views

Two ERC721 tokens that refer to the same metadata

This is a question about the ERC721 interface. I understand that the tokens are non-fungible and guaranteed to be unique to a specific account (owner). One possible way to use ERC721 tokens would be ...
4
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1answer
629 views

mint method usage in ERC721 token implementation

What does the internal method call _mint(msg.sender, tokenId) really do in the background when used with ERC721 token implementation?
0
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1answer
62 views

Meaning of “fungibility” in “Zerocash (Zcash)”? [closed]

According to the following article, Zcash provide a high level of "fungibility". compared to other crypto-currencies. Article link: https://www.investopedia.com/terms/z/zcash.asp fungibility ...
5
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2answers
644 views

ERC725 with ERC735 - Identity and Claims

How does ERC725 (Identity) and ERC735 (Claims) work together to enable a decentralized identity?