from tradecipher_blockchain_backed_privacy_pr.zk_proofs import generate_zk_proof


def test_generate_zk_proof_structure():
    data = {"trade_id": "T1"}
    constraints = {"price_band": [100, 200]}
    proof = generate_zk_proof(data, constraints)
    assert isinstance(proof, dict)
    assert proof.get("valid") is True
    assert "proof" in proof