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WFN QUICK BRIEF · UNDER 1 MIN
The short version
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What the primary record establishes
EIP-7549 moves committee information outside the signed AttestationData. The committee_bits field marks participating committees, and aggregation_bits identifies signers in their corresponding order. This makes it possible to combine votes with identical data across committees. EIP-7549 · Move committee index outside Attestation ↗
What the distinction changes
Two committees voting for the same target can now use a shared signed structure. A verifier still needs to recover the participating validator set from the bits and check the aggregate signature. The design reduces repeated work for identical vote data.
What to check before drawing a conclusion
A useful test aggregates matching votes from two committees, then changes one participation bit to verify rejection. Add a case with different attestation data so votes that belong to different groups remain separate.
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01 · VERIFIED RECORD
What the primary record establishes
EIP-7549 moves committee information outside the signed AttestationData. The committee_bits field marks participating committees, and aggregation_bits identifies signers in their corresponding order. This makes it possible to combine votes with identical data across committees. EIP-7549 · Move committee index outside Attestation ↗
02 · WFN EDITORIAL ANALYSIS
What the distinction changes
Two committees voting for the same target can now use a shared signed structure. A verifier still needs to recover the participating validator set from the bits and check the aggregate signature. The design reduces repeated work for identical vote data.
03 · REVIEW POINTS
What to check before drawing a conclusion
A useful test aggregates matching votes from two committees, then changes one participation bit to verify rejection. Add a case with different attestation data so votes that belong to different groups remain separate.
Original WFN vector illustrationWFN · 8 November 2026
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Editorial notePrimary sources and WFN analysis are identified in the article. Cover illustration by WFN.
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What is on the record?
Primary-source explainer
Primary-source explainer
Primary record / reference periodEIP-7549 · Move committee index outside Attestation
