Mint Transactions

Adding an ERC721 asset to a collection is commonly known as "minting" that asset. You can mint assets by running a mint transaction through the Myria SDK. After the assets are minted, you can use them in your project or game, or show them together with other items in a collection.

Currently, Myria supports mint transactions for ERC721 tokens (also known as NFTs), which are used to identify items in a unique way. You can read more about ERC721 tokens here. Upcoming versions of Myria's developer platform will include support for fungible ERC20 tokens.

Creating ERC721 mint transactions

Prerequisites

• Generate a Web3 public key and Stark Key, and register your developer account entity as described in the quickstart.
• Create a project as described here.
• Create a collection as described here.

ERC721 minting flow

1. Run a script to submit a new mint transaction.
2. Myria will attempt to mint an asset based on the data provided.
3. If the mint succeeds, the asset status is set to MINTED, and Myria creates a transaction with Prepare status. When a transaction is confirmed on the Myria chain, its status is set to Success.
4. If the mint fails, Myria returns an asset object with MINT_FAILED status. No asset is minted and transaction details are not included.

Asset Token Id

Each asset has a tokenId that represents a unique identifier of that asset within the collection. If you provided the correct metadataApiUrl format as an argument when you were creating a collection, then you will be able to access your minted asset via the following URL structure:

• URI - metadataApiUrl from a given collection.
• TOKEN_ID - unique token identifier of the mintable asset within that collection, which should be an incremental value.

Example URL: https://gateway.pinata.cloud/ipfs/QmSjWbBS3rPu5K2TnhyXmwGE1GcVZMRFKg5K3iML

Limitations

The following are known limitations for all mint transactions:

• You can create a maximum of 50,000 mint transactions per collection every month.
• A mintable asset has to belong to a collection and cannot be removed after it's created.
• You cannot perform a mint transaction if the collection's contract doesn't implement the mintFor() function.
• The mintable assets should follow the ERC721 standard.
• Each tokenId should be unique. If a non-unique tokenId is submitted, you will not be able to mint your asset.