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Mint from contract nft

The rest of the script sets up the call to your smart contract with you as the to-be owner of the NFT and the pointer to the metadata stored on IPFS.

Next, run the script:

npx hardhat run scripts/mint-nft.mjs \–network PolygonMumbai

You can expect to see the following output:


# Conclusion

In this tutorial, we learned how to mint a NFT end-to-end with Polygon and NFT.Storage. This technology combination results in proper decentralization and guarantees scalability, durability, and immutability.

We deployed a custom smart contract to mint our NFT specific to our needs. For this tutorial, we used a simple example based on the ERC-721 standard. However, you can also define complex logic that governs your NFT life cycle.

Mint from contract nft

You can read my full affiliate disclosure here.

We also stronglyencourage our readers to consider purchasing a hardware wallet, which starts at $59. I’ve been using the Ledger Nano X since last July and it helps me sleep better at night.

Hardware wallets like the Ledger S or Nano X are the most effective ways to protect your NFT assets from scams.

The links to the Ledger product suite are affiliate links and we may receive a small commission if you choose to make a purchase. You can read my full affiliate disclaimer disclosure here.

If you want to protect yourself and your NFTs from scams and hacks, you can shop for Ledger Hardware wallets by clicking here.

Mint nft from contract etherscan

NFT on Polygon

Minting the NFT is now merely calling the contract we just deployed to Polygon. Create a new file called mint-nft.mjs inside the scripts directory and copy this code from the listing below:

const CONTRACT_ADDRESS =”0x00″ const META_DATA_URL =”ipfs://XX” async function mintNFT(contractAddress, metaDataURL){ const ExampleNFT = await ethers.getContractFactory(“ExampleNFT”) const [owner]= await ethers.getSigners() await ExampleNFT.attach(contractAddress).mintNFT(owner.address, metaDataURL) console.log(“NFT minted to: “, owner.address)} mintNFT(CONTRACT_ADDRESS, META_DATA_URL) .then(()= process.exit(0)) .catch((error)={ console.error(error); process.exit(1);});

Edit the first two lines to insert your contract address from the earlier deployment and the metadata URL that was returned when storing the asset with NFT.Storage.

Mint nft directly from contract

Feel free to choose any name and location on your file system. Open up a terminal and navigate to the newly created folder.

Next, we will install the following Node.js dependencies:

  • Hardhat and Hardhat-Ethers, a development environment for Ethereum (and Ethereum compatible blockchains like Polygon).
  • OpenZeppelin, a collection of smart contracts featuring standardized NFT base contracts.
  • NFT.Storage, a library to connect to the NFT.Storage API.
  • Dotenv, a library to handle environment files for configuration (e.g., injecting private keys into the script).

Use the following command to install all dependencies at once:

npminstall hardhat @openzeppelin/contracts nft.storage dotenv @nomiclabs/hardhat-ethers

Hardhat needs to be initialized in the current folder.

Mint solana nft from contract

The legal consequences of such unfair behaviour, including claims for injunctive relief, damages, etc. are evident. It is therefore up to the seller to clearly describe the content of the NFT in order to avoid misleading the buyer.
This should also be kept in mind when promoting NFT sales outside of the platform. This obligation is particularly relevant with the emergence of this new technology, because it must be expected that the average consumer will have little concrete knowledge about it and therefore a high need for information in order to avoid purchase-relevant misleading statements.

What data is packed in a freshly minted NFT?

In principle, it is possible to include an entire data set of an artwork (i.e.
the GIF in our case) in an NFT and thus into the blockchain.

Mint nft from smart contract

If you mint from a contract, follow all instructions carefully. You are 100% responsible for what happens when you try to mint from a contract.

The n Project launched a few days ago and provided users with NFT assets that contained a string of 8 numbers.
Those numbers are now being used to generate art, and the creators are allowing The n Project holders to mint for free or at low cost.

However, most projects require users to mint from a contract:

Source: Twitter

I’ll walk you through step-by-step how to mint from a contract using this specific example. Other project contracts may be different, but after reading you’ll have a better understanding of this process.

Every contract is different, and the blockchain is irreversible, so always be sure to double-check all transactions before confirming.

Let’s dive into how to mint your next NFT directly from a contract on Etherscan.

How to Mint from a Smart Contract on Etherscan

  1. Find the Smart Contract
  2. Navigate to “Contract” then Write Contract
  3. Click “Connect to Web3” and Sign
  4. Select the Contract function, typically starts with “mint” or, in the case of Loot projects, “claim” and fill in required inputs (triple check on this step!)
  5. Confirm the transaction in MetaMask and receive your NFT!

Step 1: Find the Smart Contract on Etherscan

The first thing you need to do to mint an NFT directly from a smart contract is find the contract address.

The content of the .env file should look like the listing below:PRIVATE_KEY=”Your private key”NFT_STORAGE_API_KEY=”Your api key”

Replace the placeholders with the API key you created during preparation and your Polygon wallet private key.

To keep our project organized, we’ll create three new folders:

  1. contracts, for the Polygon contracts written in Solidity.
  2. assets, containing the digital asset we will mint as an NFT.
  3. scripts, as helpers to drive the preparation and minting process.

Execute the following command:

mkdir contracts assets scripts

Lastly, we will add an image to the assets folder. This image will be our artwork that we will upload to NFT.Storage and mint on Polygon.
We will name it ExampleNFT.png for now.

Well, that depends on the type of NFT it is and what you want to use it for. Generally speaking, people buy NFTs for a few main reasons:

  • For Bragging Rghts. Buying an NFT gives you sole ownership of an original, one-of-a-kind digital asset.

    The NFT is a certificate of authenticity that creates scarcity and value.

  • As an Investment. It’s too early to tell whether NFTs will continue to increase in value over the long term, but if they do, investing in an NFT could pay off in a big way down the road.
  • As Collateral for a DeFi Loan. NFTs can be used as collateral to secure a loan in the world of decentralized finance, or DeFi, a system of peer-to-peer financial services that operate on public blockchains.
  • To Use in the Metaverse. In the metaverse, digital assets are real assets.

But before we do that, we need to create it!

In your root directory, make a new file called nft-metadata.json and add the following json code:

Feel free to change the data in the json. You can remove or add to the attributes section. Most importantly, make sure image field points to the location of your IPFS image — otherwise, your NFT will include a photo of a (very cute!) dog.

Once you’re done editing the JSON file, save it and upload it to Pinata, following the same steps we did for uploading the image.

Step 5: Create an instance of your contract

Now, to interact with our contract, we need to create an instance of it in our code.

Our smart contract uses a counter to keep track of the total number of NFTs minted and to set the unique ID on our new NFT.

\@openzeppelin/contracts/access/Ownable.sol sets up access control on our smart contract, so only the owner of the smart contract (you) can mint NFTs.

After our import statements, we have our custom NFT smart contract, which contains a counter, a constructor, and a method to actually mint the NFT. Most of the hard work is done by the base contract inherited from OpenZeppelin, which implements most of the methods we require to create an NFT adhering to the ERC-721 standard.

The counter keeps track of the total number of NFTs minted, which is used in the minting method as a unique identifier for the NFT.

In the constructor, we pass in two string arguments for the name of the smart contract and the symbol (represented in wallets).

Why learn writing directly from smart contracts?

In today’s world there are a lot of improvements and developments for crypto projects. One of the main products that we use today is smart contracts.

Smart contracts are what we call those projects on blockchain. So what did they really bring, and why are they so important to learn? Main reason why they are important is that they have provided a chance for people to build stuff in any shape or form they want. This way what we thought impossible became possible via smart contracts.

Why is it so important to learn? Because thanks to Smart Contracts now we can do stuff we couldn’t do before. If you learn how to get into smart contracts and develop something there, then you would be ahead of the curve.

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