Consensus Team Update
· 2 min read
High level summary
- Leios prototype development (Treasury Funding Initiative 4: Ouroboros Leios Implementation):
- Chain selection and the volatile database now handle ranking blocks and Endorser Blocks that arrive out of order. A certifying ranking block that arrives before the Endorser Block it certifies is stored but held back from chain selection until the Endorser Block shows up. A new header bit also lets a syncing node fetch Endorser Blocks that were certified on the historical chain (#2076).
- Fixed a bug where the LeiosFetch budget leaked when a peer disconnected. Requests in flight at the time of the disconnect were never cleared, so their share of the budget was never returned, and a node could eventually stop fetching altogether. This is a plausible cause of the forks seen recently on the testnet (#2083).
- Corrected Endorser Block application to take the slot from the provided ledger state (#2085).
- Voting and certification now happen over the announcing ranking block hash (#2086).
- The
db-synthesizerconfig parser now honorsExperimentalHardForksEnabled, so experimental hard forks can be enabled when generating synthetic chains (#2077). - Made the proto-devnet demo start up more reliably by holding back the transaction generator until the nodes are ready, and reduced the tip-observation frequency for the secondary nodes (ouroboros-leios#942, ouroboros-leios#943).
- LSM-trees and UTxO-HD (Treasury Funding Initiative 10: LSM including UTXO-HD):
- Reworked the snapshot-converter into a command tree. It now offers a daemon mode that watches a node's snapshot directory and converts each exported LSM snapshot into the portable in-memory format as it is produced, a one-shot conversion in either direction, and commands to move snapshots in and out of an offline LSM database. This supports the Mithril workflow, where signers need snapshots in a single agreed format (#2064).
- Documentation (Treasury Funding Initiative 17: Maintenance and Support):