> For the complete documentation index, see [llms.txt](https://docs.transientlabs.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.transientlabs.xyz/tl-creator-contracts/erc7160tl.md).

# ERC7160TL

## Overview

ERC7160TL is Transient Labs' Creator Contract compliant with the [ERC-7160](https://eips.ethereum.org/EIPS/eip-7160) specification. 

## Airdrops

ERC7160TL allows for single token and multi-token airdrops. Multi-token airdrops are more expensive than batch mints, however, still are market leading for code-less solutions. 

| Number of Tokens | Market    | ERC721TL  |
| ---------------- | --------- | --------- |
| 5                | 450,000   | 420,000   |
| 10               | 830,000   | 675,000   |
| 100              | 6,200,000 | 5,500,000 |

## Batch Minting

ERC7160TL implements market leading batch mint operations, while adhering to the ERC-721 specification. This is achieved through the use of custom ownership logic. The table and chart below shows gas usage comparison to the current market for batch mints, in gas units.

<table><thead><tr><th width="123">Tokens</th><th width="144">Market</th><th width="220">ERC721TL Batch Mint</th></tr></thead><tbody><tr><td>1</td><td>210,000</td><td>176,000</td></tr><tr><td>5</td><td>450,000</td><td>198,000</td></tr><tr><td>10</td><td>830,000</td><td>209,000</td></tr><tr><td>100</td><td>6,200,000</td><td>402,000</td></tr><tr><td>200</td><td>12,000,000</td><td>616,000</td></tr><tr><td>1,000</td><td>Not Possible</td><td>2,331,000</td></tr></tbody></table>

<figure><img src="/files/4DcYRvpSokDt4BJYTxG7" alt=""><figcaption></figcaption></figure>

## External Mint

ERC721TL has been outfitted with an external mint function that allows for approved mint contracts to mint tokens. This is extremely useful when it comes to minting for direct sales, edition sales, and more! For more on access control, see below.

## Multi-Metadata

ERC7160TL follows the ERC-7160 specification, allowing each token to have an array of metadata associated with it. This allows for extra functionality and design for creators & collectors.

Collectors of the tokens on this contract can choose to change their token's metadata to any option in the array. This emits a `MetadataUpdate` event that let's marketplaces re-index the metadata and display it.&#x20;

## Burn

ERC721TL allows for any collector to burn tokens. This is intended to be used by creators with burn and redeem contracts in the future, but nothing stops collectors from burning tokens as they wish.

The burn function allows for the owner of the token or an approved operator to burn. The operator approval is required for burn and redeem contracts. This allows burn and redeem contracts to be configurable and determined at a later time.

## Source

<https://github.com/Transient-Labs/tl-creator-contracts/blob/main/src/erc-721/multi-metadata/ERC7160TL.sol>


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