OpenSea

OpenSea Zones provide additional functionality for orders on the marketplace. PausableZone is a simple zone implementation that approves every order.

ConduitController enables deploying and managing new conduits, or contracts that allow registered callers (or open "channels") to transfer approved ERC20/721/1155 tokens on their behalf.

Seaport is a generalized ETH/ERC20/ERC721/ERC1155 marketplace. It minimizes external calls to the greatest extent possible and provides lightweight methods for common routes as well as more flexible methods for composing advanced orders or groups of orders.

BasicOrderFulfiller contains functionality for fulfilling "basic" orders with minimal overhead.

Executor contains functions related to processing executions (i.e. transferring items, either directly or via conduits).

This contract serves as an originator for "proxied" transfers.