feat: ZK-SNARK proof system for Benford compliance on-chain attestation#358
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Inkman007 merged 2 commits intoJun 30, 2026
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…ion on-chain Closes Ledger-Lenz#194 - integrations/zk_attestor.py: BenfordZKProver class generates and verifies Fiat-Shamir non-interactive ZK proofs of Benford MAD compliance; Pedersen commitments via py_ecc (BN128 curve); Merkle commitment for trade amounts (up to 1000 per proof); proof size < 256 bytes for Soroban compatibility; attach_benford_proof_to_alert() injects proof into alert payload for high-risk scores (> 70); trade amounts never logged (only proof hash) - docs/zk_attestation.md: circuit statement, CKKS parameter rationale, Fiat-Shamir vs Groth16 trade-off, trusted setup notes, Soroban Rust verification stub, Merkle commitment design, proof field documentation Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
integrations/zk_attestor.py:BenfordZKProvergenerates Fiat-Shamir non-interactive ZK proofs of Benford MAD correctness — Pedersen commitments viapy_ecc(BN128 curve), binary Merkle tree commitment for up to 1000 trade amounts, proof size < 256 bytes (Soroban limit).attach_benford_proof_to_alert()injects proof into alert payloads for high-risk scores (> 70). Trade amounts never logged — only proof hashes emitted.docs/zk_attestation.md: Circuit statement, CKKS/Fiat-Shamir parameter rationale, trusted setup notes (none required), Soroban Rust verification stub, Merkle commitment design, security properties, V3 Groth16/zkVM upgrade path.Test plan
BenfordZKProver.prove()thenverify()returns True for valid proofverify_with_data()returns Falseattach_benford_proof_to_alertadds proof for score > 70, skips for score ≤ 70Closes #194
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