State Trees

State trees are data structures, typically implemented as Merkle Patricia Tries, used to store the current state of a blockchain, including account balances, contract code, and storage values. By organizing this data in a tree structure, the network can efficiently update and verify the global state after every transaction.

This structure is critical for smart contract platforms, as it allows the network to quickly locate and modify specific account data while maintaining a compact root hash for consensus. When a user interacts with a derivative contract, the state tree ensures that the protocol can accurately read the current margin balance and update it based on the trade outcome.

The efficiency of state tree lookups and updates directly impacts the latency of the network and the cost of executing smart contracts. Managing these trees is a complex engineering challenge that is central to the performance of high-throughput blockchains.