Weekly Report: 2025-12-12

• Large efforts on the initial ObjectDiffusion mini protocol implementation on the ouroboros-network end:

  • Implemented proper negociation of Peras enablement between nodes using NodeToNodeVersion, which required adding a new field, extra negotiation logic and tests.
  • Full CBOR and CDDL specs, with their corresponding tests.
  • Preliminary implementation of Direct-style tests.

• Continued working on the PerasVoteDB:

  • Extracted initial voting-related definitions in a standalone PR.
  • Restructured the vote aggregation logic to be clearer and moved it to its own dedicated module.

• Merged Peras 5 into ouroboros-consensus after a round of reviews.

• Merged two new PRs into cardano-ledger:

  • #5467, allowing us to pass an optional epoch nonce to the block validation logic from the consensus side, and
  • #5476, using these nonce to “validate” (with mocked-up cryptography) Peras certificates (also mocked-up) when these appear in block bodies.

• Migrated the Peras documentation and progress reports (what you are currently reading) to the new Tweag Cardano Projects website :D