op-challenger: Challenge invalid ZK games#18442
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Inphi
approved these changes
Dec 2, 2025
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Description
Adds initial support for the optimistic ZK game type to op-challenger. Currently it only challenges games but doesn't resolve them or claim bonds back.
Notably it also doesn't check the proposal was safe according to the safe head db. It will still challenge if the proposed root doesn't match the canonical one, but there may be proposals made too early that could be successfully challenged but are not. While they could be challenged, since the proposal is correct there's no reason for the challenger to do so and avoids needing the safe head db.
Tests
Added unit tests. Acceptance tests can't be added until we can actually deploy the optimistic ZK game contracts.
Additional context
Builds on #18441
Metadata
#18433