THE NFT.ORG DEX
The NFT.org DEX powered by NFT Protocol is an improvement to this model in terms of safety, security and availability because it allows offers, listings and trades to be submitted and executed 100% on-chain - i.e., without relying on user signatures stored off-chain or any other off-chain components - and collects zero user information.
NFT Protocol requires that users sign on-chain transactions which transfer the assets to the protocol in order to create listings or offers. Once in the protocol's contract, assets can only leave the contract if: