Need the ability to take WETH offers to ERC721s

[itsMarcoSolis]

As a seller
I need to have the ability to take WETH offers
So that I can obtain the WETH in exchange for my ERC721.

Details and Assumptions

• There should be an existing WETH offer for the NFT
• To take an offer, the seller must be registered.
• The desired NFT must be an ERC721

Acceptance Criteria

Given there is an existing WETH offer to a user's ERC721
When the seller takes the offer
Then the orders should be matched by Stateswap and the WETH offer must be removed from the OrbitDB database.