> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lucid.foundation/llms.txt
> Use this file to discover all available pages before exploring further.

# Identity (Passports)

> Chain-agnostic NFT minting for AI asset identity.

## Identity (Passports)

Lucid provides a chain-agnostic approach to NFT minting, specifically designed for AI asset identity. This functionality is accessible through the `INFTProvider` interface, which supports string-based addresses compatible with both Solana's base58 and Ethereum's 0x formats.

### NFT Providers

Lucid supports multiple NFT providers, each tailored to different blockchain environments. The following table outlines the available providers, their corresponding environment values, and the chains they support:

| Provider               | Env Value       | Chain                        |
| ---------------------- | --------------- | ---------------------------- |
| `Token2022Provider`    | `token2022`     | Solana                       |
| `MetaplexCoreProvider` | `metaplex-core` | Solana                       |
| `EVMNFTProvider`       | `evm-erc721`    | EVM (wraps EVMAdapter + TBA) |
| `MockNFTProvider`      | `mock`          | Dev/test                     |

### Configuration

To configure the NFT minting process, you can set the following environment variables:

* **`NFT_PROVIDER`**: Specifies the NFT provider to use. The default value is `mock`, which is suitable for development and testing purposes.

* **`NFT_CHAINS`**: Allows for multi-chain support. You can specify multiple chains by separating them with commas, such as `solana-devnet,base`.

* **`NFT_MINT_ON_CREATE`**: When set to `true`, NFTs are minted automatically upon creation.

These configurations enable developers to seamlessly integrate NFT minting into their applications, regardless of the underlying blockchain technology.