Cardano has activated the van Rossem hard fork, a network upgrade that reduces the cost of executing smart contracts. The change also lays the technical groundwork for Ouroboros Leios, a scalability upgrade expected later this year.
What the hard fork changes
The van Rossem hard fork lowers the fees associated with running smart contracts on Cardano. That means developers building decentralized applications on the network will pay less for each transaction or contract call. The upgrade doesn't introduce new features on its own — it's a plumbing change designed to make the system cheaper to use.
Why cost matters
Smart contract costs have been a sticking point for some blockchain platforms. High fees can push developers and users toward cheaper alternatives. By cutting those costs, Cardano aims to keep its ecosystem competitive. The network already hosts a range of DeFi protocols, NFT projects, and other dApps. Lower execution costs could encourage more activity and experimentation.
Preparing for Ouroboros Leios
The van Rossem fork is a prerequisite for Ouroboros Leios, a major scalability upgrade that Cardano plans to deploy later this year. Leios is expected to increase the network's throughput without sacrificing security or decentralization. The hard fork ensures the underlying protocol is ready for that change. Developers and node operators will need to update their software to stay on the correct chain.
No specific date has been set for the Ouroboros Leios rollout. The Cardano development team has said it will come after further testing and community coordination. For now, the van Rossem fork is live, and the network is running with lower contract costs.
