> For the complete documentation index, see [llms.txt](https://the-artist-xchange.gitbook.io/the-artist-xchange/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://the-artist-xchange.gitbook.io/the-artist-xchange/docs/lazymintwithtier.md).

# LazyMintWithTier

The `LazyMint` is a contract extension for any base NFT contract. It lets you 'lazy mint' any number of NFTs at once. Here, 'lazy mint' means defining the metadata for particular tokenIds of your NFT contract, without actually minting a non-zero balance of NFTs of those tokenIds.

## Methods

### getBaseURICount

```solidity
function getBaseURICount() external view returns (uint256)
```

Returns the count of batches of NFTs.

*Each batch of tokens has an in ID and an associated `baseURI`. See {batchIds}.*

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### getBatchIdAtIndex

```solidity
function getBatchIdAtIndex(uint256 _index) external view returns (uint256)
```

Returns the ID for the batch of tokens the given tokenId belongs to.

*See {getBaseURICount}.*

#### Parameters

| Name    | Type    | Description    |
| ------- | ------- | -------------- |
| \_index | uint256 | ID of a token. |

#### Returns

| Name | Type    | Description |
| ---- | ------- | ----------- |
| \_0  | uint256 | undefined   |

### getMetadataForAllTiers

```solidity
function getMetadataForAllTiers() external view returns (struct LazyMintWithTier.TierMetadata[] metadataForAllTiers)
```

Returns all metadata for all tiers created on the contract.

#### Returns

| Name                | Type                             | Description |
| ------------------- | -------------------------------- | ----------- |
| metadataForAllTiers | LazyMintWithTier.TierMetadata\[] | undefined   |

### lazyMint

```solidity
function lazyMint(uint256 _amount, string _baseURIForTokens, string _tier, bytes _data) external nonpayable returns (uint256 batchId)
```

Lets an authorized address lazy mint a given amount of NFTs.

#### Parameters

| Name               | Type    | Description                                                                                                                               |
| ------------------ | ------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| \_amount           | uint256 | The number of NFTs to lazy mint.                                                                                                          |
| \_baseURIForTokens | string  | The base URI for the 'n' number of NFTs being lazy minted, where the metadata for each of those NFTs is `${baseURIForTokens}/${tokenId}`. |
| \_tier             | string  | undefined                                                                                                                                 |
| \_data             | bytes   | Additional bytes data to be used at the discretion of the consumer of the contract.                                                       |

#### Returns

| Name    | Type    | Description                                                             |
| ------- | ------- | ----------------------------------------------------------------------- |
| batchId | uint256 | A unique integer identifier for the batch of NFTs lazy minted together. |

## Events

### TokensLazyMinted

```solidity
event TokensLazyMinted(string indexed tier, uint256 indexed startTokenId, uint256 endTokenId, string baseURI, bytes encryptedBaseURI)
```

#### Parameters

| Name                   | Type    | Description |
| ---------------------- | ------- | ----------- |
| tier `indexed`         | string  | undefined   |
| startTokenId `indexed` | uint256 | undefined   |
| endTokenId             | uint256 | undefined   |
| baseURI                | string  | undefined   |
| encryptedBaseURI       | bytes   | undefined   |