HIPs in this category include proposals addressing the Hashgraph algorithm, peer-to-peer networking, etc. These types of features are implemented on Hedera consensus nodes.

Accepted

NumberTitleAuthorNeeds Council Approval Release
415 Introduction Of Blocks Daniel Ivanov, Ivan Kavaldzhiev, Steven Sheehy Yes

Final

NumberTitleAuthorNeeds Council Approval Release
25 On-disk Virtual Merkle Tree Richard Bair, Jasper Potts Yes
406 Staking Leemon Baird Yes v0.27.0
410 Wrapping Ethereum Transaction Bytes in a Hedera Transaction Danno Ferrin Yes v0.26.0