“In the Conflux v2.0 (Hydra) upgrade, a new feature called Spaces was introduced through CIP-90. Spaces is an abstract concept that is used to distinguish Conflux-format transactions from Ethereum-format transactions. Spaces is a way to virtually create a sub-chain of the original Conflux network, known as eSpace.
Core Space refers to the original Conflux network, while eSpace is the virtualized Ethereum chain running on top of the Core Space network. The two spaces are logically independent of each other and do not affect each other.”