{
  "chain_slug": "megaeth",
  "name": "MegaETH",
  "scorecard_profile": "rollup-L2",
  "evaluated_at": "2026-04-18",
  "evaluator": "layerqu-v2-scoring-agent-3",
  "v1_reference": "chainscreen-v1-archive",
  "dimensions": {
    "1_cryptographic_exposure": {
      "weight": 0.12,
      "score": 18,
      "sub_scores": {
        "1a_primitive_inventory": {
          "score": 8,
          "primitives_named": [
            "ECDSA secp256k1 (inherited from Ethereum)",
            "Keccak-256",
            "EigenDA BLS12-381 (DA attestations)",
            "Optimistic rollup fault proofs"
          ],
          "evidence": [
            "https://docs.megaeth.com"
          ],
          "note": "High-performance L2 (~35K TPS testnet) with Ethereum settlement."
        },
        "1b_shor_grover_pq_tag": {
          "score": 8,
          "tags": {
            "ECDSA secp256k1": "Shor-break",
            "BLS12-381": "Shor-break (pairing-based)",
            "Keccak-256": "Grover-weaken-128bit"
          },
          "evidence": []
        },
        "1c_algorithm_family_diversity": {
          "score": 0,
          "families_represented": 0,
          "families": [],
          "note": "No PQC families deployed"
        },
        "1d_nist_security_category": {
          "score": 0,
          "mappings": {},
          "note": "No NIST PQC primitives deployed"
        },
        "1e_implementation_quality": {
          "score": 2,
          "formal_verification": "none published",
          "constant_time": "standard libraries",
          "libraries": [
            "MegaETH client (Rust)"
          ],
          "evidence": []
        }
      },
      "total_artifacts": 1
    },
    "2_hndl_exposure": {
      "weight": 0.08,
      "score": 8,
      "sub_scores": {
        "2a_active_key_exposure": {
          "score": 2,
          "note": "Testnet-primarily as of Apr 2025. Limited mainnet activity."
        },
        "2b_cold_key_exposure": {
          "score": 2,
          "note": "~6 weeks old. Minimal cold-key horizon."
        },
        "2c_signature_longterm_validity": {
          "score": 2,
          "note": "ECDSA Shor-breakable."
        },
        "2d_encryption_confidentiality": {
          "score": 2,
          "note": "Standard TLS. No PQC KEM."
        }
      },
      "total_artifacts": 0
    },
    "3_metadata_privacy_exposure": {
      "weight": 0.08,
      "score": 20,
      "sub_scores": {
        "3a_tx_graph_visibility": {
          "score": 5,
          "note": "Pseudonymous EVM transparency."
        },
        "3b_rpc_mempool_concentration": {
          "score": 5,
          "note": "Centralized high-performance sequencer + EigenDA. Concentrated infrastructure."
        },
        "3c_cross_chain_bridge_correlation": {
          "score": 5,
          "note": "ETH<->MegaETH bridge visible."
        },
        "3d_retroactive_deanon_risk": {
          "score": 5,
          "note": "Non-private by design."
        }
      },
      "total_artifacts": 0
    },
    "4_migration_architecture": {
      "weight": 0.15,
      "score": 22,
      "sub_scores": {
        "4a_crypto_agility": {
          "score": 5,
          "note": "Very early chain; upgrade framework not yet battle-tested."
        },
        "4b_account_abstraction_key_rotation": {
          "score": 8,
          "note": "Inherits ERC-4337/EIP-7702 from Ethereum."
        },
        "4c_hard_fork_track_record": {
          "score": 3,
          "note": "Too young — weeks of operational history."
        },
        "4d_hybrid_deployment_readiness": {
          "score": 6,
          "note": "No hybrid PQC plan. High-throughput design may struggle with larger PQ sigs without optimization."
        }
      },
      "total_artifacts": 1
    },
    "5_deployment_execution": {
      "weight": 0.22,
      "score": 0,
      "sub_scores": {
        "5a_mainnet_pqc_pct": {
          "score": 0,
          "mainnet_pqc_pct": 0,
          "evidence": [],
          "note": "no public artifact found"
        },
        "5b_pqc_code_in_client": {
          "score": 0,
          "note": "no public artifact found"
        },
        "5c_validator_pqc_adoption": {
          "score": 0,
          "note": "no public artifact found"
        },
        "5d_published_milestones_count": {
          "score": 0,
          "count": 0,
          "note": "no public artifact found"
        },
        "5e_pqc_washing_delta": {
          "score": 0,
          "ratio": 1,
          "note": "No PQC announcements."
        }
      },
      "total_artifacts": 0
    },
    "6_supply_chain_vendor_readiness": {
      "weight": 0.25,
      "score": 4,
      "sub_scores": {
        "6a_wallet": {
          "score": 1,
          "top3": [
            "MetaMask",
            "Rabby",
            "Rainbow"
          ],
          "pqc_roadmap_count": 0
        },
        "6b_bridge": {
          "score": 1,
          "top3": [
            "MegaETH Native Bridge",
            "LayerZero (limited)",
            "Across (limited)"
          ],
          "pqc_roadmap_count": 0
        },
        "6c_custodian": {
          "score": 1,
          "top3": [
            "Fireblocks (research only)",
            "BitGo (limited)",
            "Coinbase Custody (limited)"
          ],
          "pqc_roadmap_count": 0
        },
        "6d_rpc_hsm": {
          "score": 1,
          "top3": [
            "MegaETH RPC",
            "Alchemy (limited)",
            "QuickNode (limited)"
          ],
          "pqc_roadmap_count": 0
        }
      },
      "total_artifacts": 0
    },
    "7_governance_coordination": {
      "weight": 0.1,
      "score": 18,
      "sub_scores": {
        "7a_validator_stake_distribution": {
          "score": 3,
          "note": "Centralized sequencer. No validator set."
        },
        "7b_upgrade_cadence_under_pressure": {
          "score": 3,
          "note": "Too young to demonstrate coordination under pressure."
        },
        "7c_named_coordination_lead": {
          "score": 8,
          "note": "MegaETH team (Li Yilong, Shuyao Kong). Vitalik Buterin publicly backed. No named PQC lead."
        },
        "7d_adversarial_coordination_precedent": {
          "score": 4,
          "note": "No precedent yet."
        }
      },
      "total_artifacts": 1
    }
  },
  "gates": {
    "hybrid_deployment": "FAIL",
    "evidence_reconstruction": "PARTIAL",
    "primitive_naming": "PASS"
  },
  "caps_applied": [
    "Mosca (5a<20% → QRI max 60)",
    "Sutor (5d=0 → Migration Stage max 2)",
    "Preskill (most dims <3 artifacts × 0.5)",
    "Casado (4 vendor tiles pqc=0 → migration_stage max 3)",
    "Hybrid gate FAIL → QRI cap 60"
  ],
  "qri": {
    "raw": 8,
    "after_caps": 8,
    "ci_plus_minus": 17,
    "band": 1,
    "band_name": "Unaware"
  },
  "migration_stage": 0,
  "mosca_inequality": {
    "X_signature_shelf_life_years": "3-7 (very young chain)",
    "Y_migration_time_years_range": "10-15 (L2 + EigenDA dual-dep)",
    "Z_10pct_year": 2036,
    "Z_50pct_year": 2041,
    "danger_zone_at_50pct": true
  },
  "four_scenario_grid": {
    "quantum_never": {
      "value_preserved_pct": 100,
      "privacy_preserved_pct": 100
    },
    "arrives_suddenly_pre_migration": {
      "value_preserved_pct": 10,
      "privacy_preserved_pct": 10
    },
    "arrives_slowly_post_migration": {
      "value_preserved_pct": 75,
      "privacy_preserved_pct": 65
    },
    "arrives_slowly_mid_migration": {
      "value_preserved_pct": 25,
      "privacy_preserved_pct": 25
    }
  },
  "burn_vs_rescue_policy": "undeclared",
  "pqc_washing_ratio": 1,
  "vendor_tile_summary": {
    "wallet": {
      "top3": [
        "MetaMask",
        "Rabby",
        "Rainbow"
      ],
      "pqc_roadmap_count": 0
    },
    "bridge": {
      "top3": [
        "MegaETH Native Bridge",
        "LayerZero",
        "Across"
      ],
      "pqc_roadmap_count": 0
    },
    "custodian": {
      "top3": [
        "Fireblocks",
        "BitGo",
        "Coinbase Custody"
      ],
      "pqc_roadmap_count": 0
    },
    "rpc_hsm": {
      "top3": [
        "MegaETH RPC",
        "Alchemy",
        "QuickNode"
      ],
      "pqc_roadmap_count": 0
    }
  },
  "narrative_summary": "MegaETH is a very young high-performance L2 (~35K TPS testnet), Vitalik-backed. Mainnet approximately 6 weeks old as of evaluation. Standard ECDSA + EigenDA stack, no PQC activity. High-throughput design creates potential headwind for PQ signature adoption (larger sigs consume bandwidth). Band 1 Unaware, very low confidence due to nascent state.",
  "evaluator_notes": "The high-throughput L2 architecture is a migration tension point: larger PQ signatures (ML-DSA ~3KB, SLH-DSA ~8KB) may conflict with 35K TPS bandwidth targets unless aggressive aggregation is deployed. No PQC roadmap found.",
  "narrative_voiced": "MegaETH is selling 35,000 transactions a second. Post-quantum signatures are roughly a hundred times larger than ECDSA. You cannot advertise throughput AND avoid the signature question. At some point those two numbers meet, and nobody on the MegaETH side has shown the calculation."
}