Summary

Using the Hedera Token Service, you can create non-fungible tokens (NFTs). NFTs are uniquely identifiable. On the Hedera network, the token ID represents a collection of NFTs of the same class, and the serial number of each token uniquely identifies each NFT in the class.

Prerequisites

We recommend you complete the following introduction to get a basic understanding of Hedera transactions. This example does not build upon the previous examples.

1. Get a .

2. Set up your environment .

1. Create a Non-Fungible Token (NFT)

Use TokenCreateTransaction() to configure and set the token properties. At a minimum, this constructor requires setting a name, symbol, and treasury account ID. All other fields are optional, so if they’re not specified then default values are used. For instance, not specifying an admin key, makes a token immutable (can’t change or add properties); not specifying a supply key, makes a token supply fixed (can’t mint new or burn existing tokens); not specifying a token type, makes a token fungible.

After submitting the transaction to the Hedera network, you can obtain the new token ID by requesting the receipt. This token ID represents an NFT class.

2. Mint a New NFT

Both the NFT image and metadata live in the InterPlanetary File System (IPFS), which provides decentralized storage. The file diploma_metadata.json contains the metadata for the NFT. A content identifier (CID) pointing to the metadata file is used during minting of the new NFT. Notice that the metadata file contains a URI pointing to the NFT image.

🚨 Throttle cap warning

The following are examples of retry loops:

3. Associate User Accounts with the NFT

Before an account that is not the treasury for a token can receive or send this specific token ID, the account must become “associated” with the token. To associate a token to an account, the account owner must sign the associate transaction. If you have an account with the automatic token association property set, you do not need to associate the token before transferring it to the receiving account.

4. Transfer the NFT

Now, transfer the NFT and check the account balances before and after the send! After the transfer, you should expect 1 NFT to be removed from the treasury account and available in Alice's account. The treasury account key has to sign the transfer transaction to authorize the transfer to Alice's account.

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