12
votes
Get a list of all token types for ERC1155
So the question was an underlying question while trying to understand how all these platforms like OpenSeas are identifying all of the minted tokens for standard ERC721 and ERC1155 contracts. It was ...
- 362
11
votes
Accepted
ERC1155 name and symbol
The ERC1155 standard interface has a URI (Uniform Resource Identifier) that can point to a file where you can specify all the characteristics of the token (name, symbol, description, size, color or ...
- 3,379
9
votes
Accepted
Can we mint 5 gigabyte video NFTs?
I'll come at this from a slightly different direction...
The current price of ETH is ~$1500.
The Yellow Paper states that storing a 256-bit (32-byte) word costs 20,000 gas.
Average gas price is ...
- 37.6k
8
votes
How can I get a list of all owners of an ERC1155 NFT by using a web3 call?
UPDATE: Now you can use the Moralis API /nft/{token_address}/owners endpoint to get this directly.
This is quite difficult, as Anupam pointed out you would have to go through all the transfer events ...
- 921
8
votes
Royalties for ERC 1155
Short Answer:
There is currently no single way to achieve this that has been widely adopted.
Add the royalty functionality of the platforms you think you will need (like OpenSea). Example provided ...
- 402
5
votes
Get a list of all token types for ERC1155
The common way to know the number of token types (aka. tokenId) is to have a counter inside the ERC1155 contract, for instance:
uint256 private _currentTokenID = 0;
This way, whenever you need to ...
- 3,379
5
votes
Accepted
How to extract the URL of a crypto art as it appears within the NFT? and technical details like ERC-token type?
I can't find that particular piece in their contracts, but the below applies to the 2 of 10 edition.
How can I view the URL link to the associated image file as it appears within the metadata/code of ...
- 37.6k
5
votes
Accepted
What is operator approval in context of ERC-1155?
The term operator has been first introduced by the EIP-721 to define addresses authorized (or approved) by a NFT owner to spend all of his token Ids.
In EIP-1155, the operator is set by the token ...
- 4,292
4
votes
Accepted
Pattern for generating dynamic ERC-1155 or ERC-721 metadata
The approach of using an IPFS address as the token URI is intended to ensure its immutability, since the generated hash within the IPFS address will be unique for the file you are pointing to.
In your ...
- 3,379
4
votes
ERC1155 name and symbol
From the Rationale section of the standard:
The symbol function (found in the ERC-20 and ERC-721 standards) was
not included as we do not believe this is a globally useful piece of
data to identify a ...
- 37.6k
4
votes
Accepted
How is the ERC721TokenReceiver.onERC721Received data parameter used in practice?
The original thought was this would be used mainly for passing a price to a marketplace contract.
Everyone using it (just a few people) are using it for that.
I don't know of any wallets that support ...
- 4,635
4
votes
Accepted
how to make smart contract erc1155 receiver?
openzeppelin has already implemented it in the following library,
import this from openzepplin:
import "@openzeppelin/contracts/token/ERC1155/utils/ERC1155Holder.sol";
contract myContract ...
- 205
3
votes
Accepted
If crypto art is stored off-chain, how does the collector have any control over their NFT's contents if the server where it is saved shuts down?
There are several questions here. Let's review.
If crypto art is stored off-chain, how does the collector have any control over their NFT's contents if the server where it is saved shuts down?
Answer: ...
- 4,635
3
votes
Is there any way of creating ERC-1155 or ERC-721 tokens always earn transaction fees?
It is easy to create an NFT that transfers a fixed fee to you at every transfer of this NFT. Just add transfer (of ETH, or an ERC-20/1155) to it.
It is nearly impossible to get a transaction ...
- 1,744
3
votes
What are the reasons to use ERC-1155 instead of multiple ERC-20 contracts?
ERC-1155 tends to be more useful for things such as games that need both fundable (In-game gold) and non-fungible(land) tokens.
- 31
3
votes
How to Fractionalize NFT's (high level)
You got the answer yourself: ERC1155 gives you the combination of fungible and non-fungible tokens within the same standard contract.
In essence, you still have a non-fungible token with its ID, like ...
- 3,379
3
votes
Accepted
How to have the contract check if the msg.sender currently owns a specific token. (erc721)
If contracts is an ERC721 then you can query how many tokens a user owns with balanceOf
uint count = token.balanceOf(user);
if (count > 0) {
// User owns at least 1 index
}
If the tokens ...
- 31.1k
3
votes
How can I get a list of all owners of an ERC1155 NFT by using a web3 call?
If you want an ownerOf in ERC1155 youll have to implement it yourself.
rarible and opensea use indexing services like thegraph.com to keep track of transfers and who currently owns the token.
- 362
3
votes
Limiting operator transactions in ERC-1155
For the sake of simplicity, we'll call the functionality to limit approves to a specific token and amount "individual approves" since the approvals won't just be a blanket approval over all ...
- 1,438
3
votes
Accepted
ERC-1155 events for approval
These two functions are not part of the EIP-1155 (https://eips.ethereum.org/EIPS/eip-1155).
In fact, the EIP only defines :
/**
@notice Enable or disable approval for a third party ("...
- 4,292
3
votes
Accepted
Which token standard should be use to create different tokens for different users?
I have requirement to create a platform on which users can register and create their own token with passing token name, price and so. Is it possible to develop such contract to create different token ...
- 927
3
votes
What are the reasons to use ERC-1155 instead of multiple ERC-20 contracts?
The only benefit is having everything in the same place.
ERC-1155 is orders of magnitude more gas efficient, as deploying an ERC-20 contract is costly with current Ethereum gas prices.
- 21.7k
3
votes
What is the best way to handle multiple NFTs of the same collection in ERC1155?
The short answer is that it looks like the latter, unique id for each NFT, regardless of grouping (eg stadium). But to have NFT-like grouping there are a couple of considerations:
The nft example ...
- 31
3
votes
How do I let a user transfer ERC1155 token from my contract address to his address?
Could you look into the documentation on openzepplin? I've linked it here, particularly pertaining to ERC1155PresetMinterPauser.There's a dependency that I don't see mentioned here, namely, Access ...
- 1,950
3
votes
Accepted
How can Opensea and Etherscan understand that CryptoPunks are NFTs if the contract does not implement ERC20, ERC721 nor ERC1155?
Etherscan hardcoded the CryptoPunks contact to show up that way.
Basically Etherscan is programmed this way:
If contract is CryptoPunks
handleCryptoPunksSpecially()
Else If contract is CryptoKities
...
- 4,635
3
votes
Accepted
How would I go about finding out whether an address owns a specific NFT or not?
If you know the address of the account you want to check and a the specific id of the token you can use the balanceOf or ownerOf method of the token standards.
For ERC-1155 you would use the following ...
- 4,814
3
votes
Accepted
Confusion around ERC721/ERC1155 and IPFS/IPNS
Using 721 or 1155 depends on the type of assets you want to add to your system and the growth you expect for your project. This is: if you're totally sure that you won't need anything else than:
...
- 200
3
votes
Accepted
Is there a limit on how many tokens I can mint on a contract?
At its core, ERC1155 uses a mapping to store the balances of tokens (see the code here: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/defcf20042479d995a0688bdfd019e44c9e79d76/contracts/...
- 946
3
votes
How to get all the owners from an NFT collection?
All other answers give valid suggestions. If you are interested in how to query directly from the smart contract, you can leverage ERC-721's ownerOf methods.
This is a sample script base on web3JS:
...
3
votes
How to find total value in ETH of all NFTs owned by a user
If you like to get the user's NFT portfolio value, then you can use Moralis to provide you with such data.
Simply sign up to Moralis to get the API key and install the SDK:
npm install moralis
Then, ...
Only top scored, non community-wiki answers of a minimum length are eligible