# Consumer Centered Object Tracking
A user can register their item on our smart contract and it’s given a unique id The item has the number of transactions If it’s for sale or not: In the meta data: the price it was sold at every time it was handed off to another person In the meta data: who in the past has ever owned the item
Once you’ve registered the item: cell item function you’re listing the item for sale if someone clicks into the sale, then you have to send the ether you’re selling, it’s successful, then add to the total number, then transfer the owner