Cardano's next major upgrade — Protocol Version 11, known as the Van Rossem hard fork — is heading to a governance vote on mainnet May 29. But the path to enactment hit a snag this week when the Hard Fork Working Group withheld ratification for the PreProd test environment, citing unresolved concerns around Ogmios, a critical piece of infrastructure.
The vote and the hold-up
The vote itself is straightforward: the Constitutional Committee and stake pool operators will decide under Cardano's current bootstrapping rules. Full DRep participation comes later. But enactment is conditional on infrastructure readiness — and right now Ogmios isn't ready for PreProd. The working group hasn't said when that might change, leaving the timeline for the actual fork in limbo until the dependency clears.
Plutus gets a boost
V11 is an intra-era hard fork, keeping Cardano inside the Conway era. The real story is what it unlocks for developers. All built-in functions become available across Plutus V1, V2, and V3. Case expressions and new built-ins land, including arrays, optimized multi-asset value operations, and list handling. Two additions stand out: modular exponentiation and BLS12-381 multi-scalar multiplication.
BLS12-381 MSM is the big one. Input Output Global (IOG) has tied it directly to its Halo2-Plutus verifier and the Midnight-Cardano ZK bridge. Testing showed MSM of 10 G1 points ate 7.74% of a transaction's computational budget. Go above 129 points and you exceed single transaction capacity — so there are limits, but the primitive is there for ZK proofs, bridges, and cross-chain verification.
Modular exponentiation, proposed in CIP-109, cuts transaction size and execution cost for crypto operations. Existing on-chain implementations of certain inverses can consume 5% to 9% of CPU budget — this built-in replaces that overhead.
Governance under bootstrapping
For V11 governance actions, only the Constitutional Committee and stake pool operators get a vote right now. That's the bootstrapping phase. Full DRep participation isn't here yet. Voting closes when the infrastructure passes muster. The V11 upgrade also enforces VRF key uniqueness at the ledger level — no two stake pools can reuse the same VRF key, which reduces attack vectors around pool identity.
Price and activity
Cardano DeFi activity remains modest compared to other smart contract chains. ADA's price performance increasingly tracks real developer and DeFi activity — the kind of signal the Van Rossem upgrade is meant to improve. For now, the market's waiting like everyone else. One thing that won't change: ADA holders keep full wallet and token access throughout the transition.
The vote happens May 29. Whether the network actually forks after that depends on Ogmios getting the green light. The working group isn't saying when that'll happen — just that it won't be yet.
