Prepare
Factories
A factory is a contract you own that mints through many addresses at once. It's what makes bundles possible: one transaction, every minter.

Kinds of factory
- Delegate factory — your own wallets delegate to it, and it mints as each of them.
- Proxy factory — it deploys small proxy contracts of its own, and mints from those.
Adding one
Press the dashed New Factory card: deploy a new factory (priced on a fee card first), or import one you already own by its address.
Looking after it
- Fund Factory tops up its balance — bundles that pay the block builder pay from here.
- Withdraw takes the balance back out.
- Consolidate gathers NFTs or tokens held by its minting addresses into one wallet.
- The Delegates or Proxies tab lists the minting addresses; Admins lists who else may use it.
Don't bundle ERC721C (creator-enforced) collections with a proxy factory — your NFTs will get stuck.
Before bundling, check the collection contract's
getTransferValidator() on the explorer. If it returns anything other than 0x0000000000000000000000000000000000000000, don't use a proxy factory — use a delegate factory instead.Edition (ERC-1155) drops can't be bundled. Factory addresses can't receive them, so those mints would fail — the app refuses them up front.