CryptoSlate
Cardano developers merged Praos2, LeiosNotify and LeiosFetch into the main development branch, moving the network closer to its planned Leios scaling rollout. The upgrade initially targets a three-to-fivefold increase in capacity, with later adjustments potentially lifting throughput to 10x to 15x current levels.
Why it matters
Cardano's existing Ouroboros Praos system has an estimated ceiling of about 4.5 kilobytes of transaction data per second. Leios adds endorser blocks, allowing additional transactions to be validated and certified separately from ordinary block production. The initial target is approximately 13.5 to 22.5 kilobytes per second, with later limits potentially reaching 45 to 67.5 kilobytes.
The code merge is meaningful, but the rollout is not yet complete. Work on selecting and retrieving endorser blocks remains outstanding, while the Dijkstra testnet still runs under Cardano's existing Conway rules. Moving to protocol version 12 requires a new node prerelease and a hard-fork initiation action.
Market impact
The next phase depends on execution across software, governance and infrastructure. Cardano operators must register BLS keys, with IOG targeting coverage of roughly 90% to 95% of delegated stake before activation. Leios certification requires signatures from at least 75% of active stake.
Governance votes will set the permitted parameters and approve the hard fork and later capacity increases. Controlled high-load exercises will test transaction propagation, certification reliability and spare processing capacity. For ADA, the development strengthens the network's scaling case, but the full 15x ambition remains conditional on testing, operator readiness and separate approvals.
Frequently asked questions
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What Leios capacity increase is Cardano targeting first?
The initial Leios rollout targets a three-to-fivefold increase in Cardano's transaction capacity, equivalent to about 13.5 to 22.5 kilobytes of transaction data per second.
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What is Cardano's longer-term Leios scaling goal?
Later adjustments could raise capacity to 10x to 15x current levels, with potential throughput of roughly 45 to 67.5 kilobytes per second.
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Which Leios components did Cardano developers merge?
Developers merged Praos2, LeiosNotify and LeiosFetch. Work on selecting and retrieving endorser blocks remains outstanding.
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What must happen before Dijkstra can activate Leios?
Cardano must transition the Dijkstra testnet to protocol version 12, complete governance approvals, register operator BLS keys and run controlled high-load exercises.
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Why are BLS keys important for Cardano's Leios rollout?
BLS keys allow operators to participate in certifying Leios endorser blocks. IOG is targeting coverage representing about 90% to 95% of delegated stake, while certification requires signatures from at least 75% of active stake.
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