In the following paragraph, we will examine user interactions with the blockchain using a purchase of a non-fungible token(NFT) as our case example. We will explore how a user action like the purchase of NFTs affects the blockchain on different levels.
On the surface level, your phone or computer is connected to the internet. Apps and webpages can get you in contact with the blockchain through the internet, just like using any other online service like e-mail.

The Partisia blockchain lives on a network of computers connected to each other through the internet. The blockchain comes with a software architecture which allows for binding trackable transactions to happen very fast. A purchase of an NFT is a transaction on the blockchain. Specifically, it is an action of an active smart contract.

Smart contracts hold some information which can be changed, that information is called the state. The state of our NFT contract holds an inventory of NFTs and their owners. The contract action Transfer can change the ownership of an NFT by changing an owner address in the inventory. Actions of contracts are themselves transactions on the blockchain. When they have been added to a block and executed, the resulting state change of the contract becomes part of the blockchain state. We now have a permanent timestamped record of the purchase.