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feat: implement EIP-8045 exclude slashed validators from proposing #9422

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feat: implement EIP-8045 exclude slashed validators from proposing #9422

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1f072a1
feat: implement EIP-8045 exclude slashed validators from proposing
nflaig May 29, 2026
689969e
Merge branch 'unstable' into nflaig/eip-8045
nflaig May 29, 2026
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9 changes: 8 additions & 1 deletion packages/state-transition/src/epoch/processProposerLookahead.ts
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
import {ForkSeq, MIN_SEED_LOOKAHEAD, SLOTS_PER_EPOCH} from "@lodestar/params";
import {ssz} from "@lodestar/types";
import {CachedBeaconStateFulu, EpochTransitionCache} from "../types.js";
import {FLAG_UNSLASHED} from "../util/attesterStatus.js";
import {computeEpochShuffling} from "../util/epochShuffling.js";
import {computeProposerIndices} from "../util/seed.js";

Expand All @@ -26,7 +27,13 @@ export function processProposerLookahead(
// Save shuffling to cache so afterProcessEpoch can reuse it instead of recomputing
cache.nextShuffling = shuffling;

const lastEpochProposerLookahead = computeProposerIndices(fork, state, shuffling, epoch);
const activeIndices =
fork >= ForkSeq.gloas
? // Exclude slashed validators from proposing (EIP-8045)
shuffling.activeIndices.filter((index) => (cache.flags[index] & FLAG_UNSLASHED) !== 0)
: shuffling.activeIndices;

const lastEpochProposerLookahead = computeProposerIndices(fork, state, {activeIndices}, epoch);

state.proposerLookahead = ssz.fulu.ProposerLookahead.toViewDU([
...remainingProposerLookahead,
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