> For the complete documentation index, see [llms.txt](https://learn.buildship.xyz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learn.buildship.xyz/solidity-roadmap/metaverse-nft-factory-v3.md).

# Metaverse NFT Factory v3

v3 version for Factory should be the state-of-the-art optimized smart-contract, also featuring long-requested updates as:

* ERC721A cheap mints
* Optional unlimited total supply
* Mint by token ID
* Lazy mint: signed and IPFS-stored but unminted NFTs
* OpenZeppelin / Biconomy Relayer (gasless mint <https://portal.thirdweb.com/guides/create-gasless-nft-drop>)
* Refunds/Vesting