feat(slasher): add duplicate attestation slashing#20218
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spalladino merged 1 commit intomerge-train/spartanfrom Feb 9, 2026
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feat(slasher): add duplicate attestation slashing#20218spalladino merged 1 commit intomerge-train/spartanfrom
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Implements slashing for validators who send duplicate checkpoint attestations (equivocation). Mirrors the duplicate proposal slashing but for attestations: a validator signing attestations for different proposals at the same slot. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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BEGIN_COMMIT_OVERRIDE chore: add new retention policy to cloudflare R2 (#20276) fix: k8s enricher opt-in (#20279) feat(slasher): add duplicate attestation slashing (#20218) chore: improve HA e2e (#20280) chore(test): fix p2p integration test (#20283) chore(claude): minor changes to claude md and rules (#20284) chore(test): fix p2p message propagation test build error (#20289) chore(claude): add actor info to analyze-logs (#20290) feat: tx file store source for tx collector (#20165) chore(test): fix validator integration test (#20288) chore(e2e): remove setup with remote env in e2e tests (#20294) chore: fix test flakes (#20295) chore: user-perceived latency explorer (#20298) fix(p2p): fix flaky file store tx collection tests (#20318) chore(spartan): add mbps-net env definition (#20308) fix(validator): do not process proposals from self (#20314) chore(ci): track history in merge-trains (#20321) fix(e2e): enable broadcastEquivocatedProposals in duplicate proposal slash test (#20320) chore: use respective get endpoints for rollup test instead of only port-forward (#20327) END_COMMIT_OVERRIDE
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Summary
shouldAttestToSlotcheck insidecreateCheckpointAttestationsFromProposalto minimize the race windowSLASH_DUPLICATE_ATTESTATION_PENALTYenv var across all spartan deployment configsTest plan
e2e_p2p_duplicate_attestation_slashverifies offense detection end-to-endFixes A-349
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