Starknet has launched a seven-day governance vote on whether to leave Ethereum, citing quantum-computing risks to the network's security assumptions, according to the proposal now open to token holders.

The vote runs for one week and asks Starknet's community to decide on detaching the Layer 2 network from the Ethereum mainnet it currently settles on. The stated motivation is quantum risk: the concern that future quantum computers could break the cryptographic schemes securing Ethereum's transactions and, by extension, assets settled on it.

It's a striking governance event. Starknet, built by StarkWare using STARK proof technology, has operated as one of Ethereum's most prominent scaling networks. Moving settlement off Ethereum would sever the security inheritance that has defined the rollup model since inception.

Why quantum risk, and why now?

The proposal's framing rests on a long-debated threat. Ethereum, like virtually all public blockchains, relies on elliptic-curve cryptography for signatures and on hash functions for address integrity. A sufficiently capable quantum computer could forge signatures or derive private keys from public ones, which would undermine the chain's ownership model at its root.

No such machine exists today. But timelines in the quantum-computing field keep shortening, and post-quantum migration is no longer a fringe topic. The US National Institute of Standards and Technology finalized its first post-quantum cryptography standards in 2024, and networks have begun auditing their exposure in response.

For Starknet, the argument appears to be architectural: if the settlement layer's cryptography is ultimately vulnerable, a network that can redirect its settlement has an escape path that one welded to Ethereum lacks.

What does the vote actually decide?

The seven-day vote is a governance signal first, an operational plan second. Leaving Ethereum would require Starknet to specify an alternative settlement arrangement — another chain, a sovereign chain of its own, or a hybrid design — and to execute a migration that touches bridges, token contracts and every application built on the network.

The business consequences are substantial. Starknet's ecosystem of developers and applications chose the network partly because it settles to Ethereum, with its deep liquidity and battle-tested security. Any move away from that anchor would force integrators, exchanges and bridge operators to re-evaluate their infrastructure. Institutional users that treat Ethereum settlement as a compliance and custody assumption would need new arrangements.

There's also the validator question. Ethereum's validator set, running in the hundreds of thousands, secures rollup settlement today. A Starknet that settles elsewhere would need to articulate who, or what, provides equivalent guarantees.

The stakes for the Layer 2 sector

Whatever the outcome, the vote is a precedent. Layer 2 networks have marketed themselves as extensions of Ethereum's security. A serious, majority-backed proposal to abandon that model — over any rationale — forces the sector to confront how durable that promise is.

It also lands amid broader soul-searching about rollup alignment. Debates over sequencer decentralization, shared sequencing and L2 loyalty have run for years. A quantum-risk exit vote adds a new axis: not whether Layer 2s are technically Ethereum-native, but whether they would stay Ethereum-native under duress.

Voting closes seven days from launch. If the proposal passes, expect a follow-up technical blueprint with migration mechanics and timelines; if it fails, the quantum-risk argument doesn't disappear — it simply waits for the next governance cycle.