The VeChain Foundation created and uses two types of nodes: economic X nodes (XNs) and economic nodes (ENs). Along with authority masternodes, they incentivize coin holders to run a node in exchange for tokenized VET rewards and help maintain network consensus. XNs are classified into four tiers based on the amount of VET staked, whereas ENs are classified into three tiers. VeChainThor Node smart contracts manage XNs and ENs, which interact with the entire blockchain system. No new XNs can be created after 2020, and existing XN operators are considered long-term supporters of the project.