# ERC721TL

## Airdrops

ERC721TL 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

ERC721TL 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. 

When plotted out, you can see that the slope of Transient's batch mint is basically flat compared to that of other options on the market.

<table><thead><tr><th width="123">Tokens</th><th width="144">Market</th><th width="220">ERC721TL Batch Mint</th><th data-hidden>ERC721TL Batch Mint Ultra</th></tr></thead><tbody><tr><td>1</td><td>210,000</td><td>176,000</td><td>176,000</td></tr><tr><td>5</td><td>450,000</td><td>198,000</td><td>187,000</td></tr><tr><td>10</td><td>830,000</td><td>209,000</td><td>187,000</td></tr><tr><td>100</td><td>6,200,000</td><td>402,000</td><td>187,000</td></tr><tr><td>200</td><td>12,000,000</td><td>616,000</td><td>187,000</td></tr><tr><td>1,000</td><td>Not Possible</td><td>2,331,000</td><td>187,000</td></tr></tbody></table>

## 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.

## 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.

### Access Control

There is a built in access control mechanism for admins & mint contracts. This can be used to generate systems for novel mint mechanics, updatable metadata based on offchain mechanisms, and much more.

### Rendering Contract

There is the ability to use a separate rendering contract for token uri generation. This allows for mint & reveal schemes, fully onchain metadata, and more.

## Source

<https://github.com/Transient-Labs/tl-creator-contracts/blob/main/src/erc-721/ERC721TL.sol>