To support feeless and near-instant transactions, Nano uses a different architecture called block lattice. With block lattice, every Nano address has its own blockchain and the blockchain can only be updated by the address. The Nano network consists of validators that store the full state of the network and users who own addresses. Validators have high storage and bandwidth costs since each validator needs to keep track of every address's blockchain, vote on transactions, and relay them to the rest of the network. Since new blocks do not create new NANOs and transactions are feeless, validators do not earn a reward for their work. When asked about disk space and bandwidth usage, the team has stated that both are being improved by pending protocol updates which are expected for deployment in late 2018. It will be possible to run ‘light’ and ‘pruned’ nodes then.