Foundry

an ERC721 marketplace that uses onchain orders coupled with vrs signatures to create and confirm orders

the marketplace allow users to create erc721 orders for their erc721 tokens

the order should have the following info

order creator/token owner(obviously)

erc721 token address, tokenID

price(we'll be using only ether as currency) - active

signature(the seller must sign the previous data i.e the hash of the token address,tokenId,price,owner etc)

deadline, if the token isn't sold before the deadline, it cannot be bought again

when the order is being created by the buyer, the signature is being verified to be the owner's address among other checks

order fulfillment has its own checks too

Blue print link -> https://docs.google.com/document/d/1DyOgz7VGDE1STwLX12LHalbo11Nh1Lu02VrwqOmxjn4/edit?usp=sharing