FAQ
We compiled all the frequently asked questions - please check when you have some troubles.
Overall
Does Launchpad support Solana?
Unfortunately, we don't. We support Ethereum, Polygon, BNB Smartchain, Base, Arbitrum, Rari, Blast and Optimism.
Features
How to reserve NFTs for team/marketing purposes?
You can use gift/airdrop functionality to send tokens to team members addresses. Gift/airdrop works for bulk send, so you could even make a list of addresses/quantity in the CSV, import the CSV and bulk send tokens.
If you want to send custom 1/1 tokens to your team, you can insert 1/1 tokens in art generation process at the beginning of the collection and airdrop them before you start the sale (for example, if you want to gift 10 1/1 tokens, inserting them at the beginning of the collection allows you to make token #1-#10 1/1 tokens. As tokens will sequentially get minted, you can airdrop these first so that token #1-#10 will be airdropped to the address you specify.
Is it possible to set up multiple mint phases?
Yes, you can do multiple mint phases such as different price, different allowlist etc.. For example, you want to do:
Sale 1: Price: 0.03 ETH, allowlist 1
Sale 2: Price 0.02 ETH, allowlist 2
You can start the sale with 0.03 ETH for allowlist 1, close the sale, change the price to be 0.02 ETH, remove the allowlist 1 and add allowlist 2 and restart the sale. You can change the sale status, price, allowlist after contract deployment from contract management page, so you won't need a contract re-deployment. You will need a blockchain transaction to change sale status and price, but you don't need it to change allowlist.
Can we add/edit metadata after deployment?
Yes, you can change metadata as many time as you want even after deployment. However, if you are using our art generator, re-generating art will invalidate the contract. So if you want to re-generate the art after deployment, we recommend you to create a new project to generate art, upload to IPFS and set the IPFS link to token base URI of your contract (you can do so from "Reveal" section.
Where can I see the the number of minted NFTs and remaining supply?
You can see the the number of minted NFTs and remaining supply from contract management page in "Sale" tab.
Are mints will be according to the order of my uploads/file name?
Yes, for example, the metadata file named as 1 will be token #1.
Can more than 2 people work on the same project through HeyMint?
Yes, We need you to start creating the project first and reach out to us; send us the email of the person who you want to add and your project ID so we can add it on our side.
Is it possible to have an Open Edition mint? I'd love to release something that's an unlimited supply.
Is there any way to provide exceptions for my art Layers? I have a few images that don't work well with art in another few specific other layers.
How do I make sure that the NFTs are minted on the Polygon blockchain instead of Ethereum?
When you deploy your contract, you should be able to change the network from the drop down menu and select Polygon network. It will then trigger your wallet to change networks from Ethereum to Polygon.
Smart contract
Contract deployment
Do I need to verify my contract on Etherscan?
No, you don't need to verify your contract on Etherscan as Launchpad already has a functionality that allows you to verify your contract.
Do I need to redeploy smart contract to change allowlist after deployment?
Nope! You can add/remove members to your allowlist without redeploying your smart contract. You also won't need to make any transaction to change the allowlist and as soon as you add/remove members from allowlist, the change will be reflected immediately.
Will my testnet contract affect my mainnet contract when I mint or airdrop in testnet?
No, your testnet contract won't affect your mainnet contract when you mint or airdrop in testnet. Once you deploy a contract on mainnet, it's a completely new smart contract and any airdrops or mints done in testnet won't reflect in your mainnet contract.
Contract specs
Can we freeze metadata?
Yes you can. We don't have that option on our Launchpad frontend, but you can do so by calling the freezeMetadata
function on etherscan for your contract. In order to call the function, you will need to verify your contract, which you can do so from Launchpad.
Can I run public sale and presale at the same time?
Yes you can! If you run them at the same time, for the people who are allowlisted will see presale price and those who aren't will see the public price. Please note that if you run both sales at the same time, the smart contract will respect the max supply for both sales (therefore presale max supply is not respected) and people in the allowlist can mint up to max supply. If you would like to keep the supply only for presale supply for allowlisted people, we recommend you to run sales at different times.
Can I add more tokens to ERC-1155 contract after deployment?
Unfortunately, we don't support that functionality yet. Once you deploy your smart contract, you can't add or remove tokens from the contract.
Can I upload all metadata in a single JSON file?
Because each token needs its own metadata, you can't put all the metadata in a single JSON file and upload it. For example, if you have 10 tokens, you will need 10 different metadata files. This is because each token is one-of-a-kind and has its own distinctive attributes.
Can I upload MP4 files, and are there any size limits?
Yes, you can upload MP4 files; however, OpenSea imposes a 100 MB maximum file size restriction. Before uploading a video file to the Launchpad, you should ensure that it does not exceed this size restriction. If your MP4 file is too large, you may need to compress or optimize it so that it fits inside the allowed size range. We suggest using a video editing program or an internet compressing tool to do this.
Please note that when OpenSea displays assets that are categorized as animation (mp3/mp4), the animation asset will only appear on the collection details page and not on the collection summary page, which can only display photos. So, when users want to utilize animation files such as mp3 or mp4, they must upload both an image and an animation file.
How can I burn the remaining supply from my collection?
If the tokens haven't already been minted, you can reduce the max supply by calling the reduceMaxSupply function on your contract on Etherscan on the Contract #writeContract tab and passing in the number of total tokens minted and your supply will be locked at that number permanently.
If the tokens are already minted, unfortunately the only way you can burn them is by manually transferring them to the burn address, 0x000000000000000000000000000000000000dead
Marketplace
My NFT doesn't show up on Testnet Opensea
If you are still seeing an issue, most of the cases it's caused by incorrect metadata settings. Please make sure your metadata settings are correct:
Make sure your token base uri is pointing a folder that contain metadata files (JSON format), not the folder of your asset files
Is there a way to see my NFTs on Opensea as a collection?
Once the contract is deployed, as soon as you mint a single NFT, it'll show up on OpenSea.
What is an OpenSea slug?
Your OpenSea slug can be found by looking at the end of your collection's URL on OpenSea:
In this example, the slug is "catc".
Art
Can I upload all metadata in a single JSON file?
No, each token has to have it's own metadata, so if you have 100 tokens, you will need 100 metadata files
Can I use .GIFS on your art generator?
If you want to use our art generator, unfortunately it currently does not support .gifs. But if you import the metadata, then it's possible to use .gifs for your collection
Why can't I upload metadata files with .json extension as token URI?
Our token URIs are designed to not expect a .json file extension at the end of the metadata file. To upload your files smoothly onto our platform, you just need to remove the .json from the metadata filename (For example: instead of 1.json please rename it to 1).
If you're experiencing difficulty and are willing to share your metadata files or an IPFS link to them, please feel free to send us a message at hey@heymint.xyz. We can assist in removing the .json extension in the filenames.
Mint website
Why is my mint closed?
If you start the sale and still see the mint closed message, you might be setting start time for your contract and start time hasn't come yet. If you want to start, you can remove start time settings to start the sale immediately.
Some people can't see the mint button
Mint buttons could have issues the browsers the users are using, recommend them to use different browser or clear the browser cache.
Why can't I log in to my HeyMint account?
If you're experiencing issues, it's possible that our platform is currently experiencing issues. However, rest assured that we're working diligently to restore normal operation as soon as possible.
Error Messages
There was an error parsing the metadata CV: Essential information (title, image_filename) not found
This error message can appear if the asset's filename is not correctly formatted. Please ensure that you enter the filename of the asset without the file extension.
For example, if the name of the asset file for token 1 is 1.jpg, input "1" in the relevant field.
This should be the name of the image exactly as it appears in the IPFS folder of all the image assets you uploaded and linked to on Launchpad.
If I do not have a website for my project yet to embed your button, can people mint directly from your contract?
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