IO Seeks 27M ADA to Push Cardano’s Leios Scaling Upgrade Toward Mainnet Readiness

In a Cardano Governance Hour session on YouTube, Carlos Lopez de Lara, product manager for Leios at Input Output, outlined why IO’s Consensus Initiative has become one of the most important infrastructure proposals in the current Cardano governance cycle. The proposal asks for more than 27 million ADA to continue Ouroboros Leios work through the 2026, 2027 period, with the goal of moving the upgrade from prototype and testnet development toward mainnet readiness.

The debate is larger than a single funding request. Cardano governance is being asked to decide whether the treasury should finance a core consensus upgrade before higher network demand reaches the limits of the current system. Leios is designed to increase Cardano’s layer 1 transaction capacity while keeping the security assumptions of Ouroboros Praos, the consensus protocol that secures the network today.

Cardano Leios Targets Layer 1 Scaling

Ouroboros Leios is a proposed scaling upgrade for Cardano’s base consensus layer. In the Governance Hour discussion, Lopez de Lara explained that today’s Ouroboros Praos produces blocks at regular intervals, while nodes spend part of the time between blocks waiting for the next opportunity to process network activity. Leios attempts to use that interval more efficiently.

The central mechanism is the introduction of endorser blocks. These blocks are designed to carry more transaction data than a standard Praos block. A selected group of stake pool operators would validate the contents, participate in the endorsement process and allow a later Praos block to include proof that the additional transaction data was checked by the network.

That design makes Leios more than a performance patch. It is an attempt to increase Cardano throughput at the protocol level without replacing the consensus architecture that already protects the chain. For users and builders, the practical goal is simple: more room for applications, more transaction capacity and a network better prepared for periods of heavier demand.

The proposal also reflects a shift from research toward delivery. Lopez de Lara said the work has already moved from papers and simulations into prototype implementation, devnet activity and preparation for broader public testing. The requested funding is meant to support the next stage, where the prototype must be hardened, measured, validated and prepared for the governance path toward activation.

Treasury Funding Turns Leios Into a Governance Test

The Consensus Initiative is also a test of Cardano’s treasury process. IO is not only asking the ecosystem to agree that scaling matters. It is asking DReps and voters to fund a complex engineering program whose value depends on evidence, delivery discipline and trust in a long technical roadmap.

Lopez de Lara framed the case for Leios around two pressures. The first is market timing. He argued that the crypto industry is entering a period where clearer regulation, institutional products and real world blockchain use cases could create stronger demand for networks with higher capacity. In that context, Cardano needs to prepare before the demand arrives, not after congestion becomes a constraint.

The second pressure is economic sustainability. As Cardano’s reserves decline over time, the network will increasingly need real transaction activity to support fees, staking economics and long term security. Higher throughput alone does not create adoption, but it gives Cardano more room to host the applications and usage that can make the network economy more durable.

That is why this proposal carries political weight. A yes vote would signal that Cardano governance is willing to finance core protocol infrastructure before the upgrade becomes visible to ordinary users. A no vote would not remove the need for scaling, but it would force IO and the ecosystem to revisit the funding structure, communication and evidence required to move Leios forward.

Leios Depends on Testing, Dijkstra and Developer Access

The path to Leios is not only about writing consensus code. According to the Governance Hour discussion, the work also includes release candidate preparation, protocol parameter exploration, attack model validation, simulations, benchmark evidence, public testnet participation and hard fork coordination. Those steps matter because a consensus upgrade cannot rely on theory alone once it is moving toward mainnet.

Lopez de Lara also connected Leios to the expected Dijkstra era, describing it as potentially one of Cardano’s most complex hard forks so far. Leios would require new protocol parameters, constitutional guardrails and coordination across network infrastructure. That makes the upgrade partly technical and partly constitutional, because Cardano’s governance system must be ready before the protocol can safely change.

Another important point was developer experience. Leios can increase Cardano’s capacity, but capacity has limited value if builders still face too much friction when creating applications. Lopez de Lara argued that Cardano also needs better tooling, clearer documentation and reusable smart contract infrastructure so developers can move from idea to working product faster.

That connection gives the Leios debate its real shape. Cardano is not only deciding whether to buy more throughput. It is deciding whether to fund the consensus layer, testing process and developer environment needed for a larger application economy. The immediate vote is about 27 million ADA, but the deeper question is whether Cardano wants to prepare its base protocol for the kind of network activity it expects to compete for in the next phase of crypto adoption.