feat: fraud proof poc

[mtsitrin]

Description

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Closes #XXX

All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow-up issues.

PR review checkboxes:

I have...

• [ ] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• [ ] Targeted PR against the correct branch
• [ ] included the correct type prefix in the PR title
• [ ] Linked to the GitHub issue with discussion and accepted design
• [ ] Targets only one GitHub issue
• [ ] Wrote unit and integration tests
• [ ] Wrote relevant migration scripts if necessary
• [ ] All CI checks have passed
• [ ] Added relevant godoc comments

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For Reviewer:

• [ ] Confirmed the correct type prefix in the PR title
• [ ] Reviewers assigned
• [ ] Confirmed all author checklist items have been addressed

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After reviewer approval:

• [ ] In case the PR targets the main branch, PR should not be squash merge in order to keep meaningful git history.
• [ ] In case the PR targets a release branch, PR must be rebased.