{
  "chain_slug": "metis",
  "name": "Metis",
  "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": 24,
      "sub_scores": {
        "1a_primitive_inventory": {
          "score": 10,
          "primitives_named": [
            "ECDSA secp256k1 (inherited from Ethereum)",
            "Keccak-256",
            "Tendermint consensus (Ed25519) for decentralized sequencer pool",
            "MPC signatures (multi-party computation for sequencer coordination)"
          ],
          "evidence": [
            "https://docs.metis.io/dev"
          ],
          "note": "Optimistic rollup with a decentralized sequencer pool — unusual among L2s."
        },
        "1b_shor_grover_pq_tag": {
          "score": 10,
          "tags": {
            "ECDSA secp256k1": "Shor-break",
            "Ed25519": "Shor-break",
            "MPC (ECC-based)": "Shor-break",
            "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": 4,
          "formal_verification": "none published",
          "constant_time": "standard libraries",
          "libraries": [
            "OP Stack fork + Tendermint + MPC"
          ],
          "evidence": []
        }
      },
      "total_artifacts": 1
    },
    "2_hndl_exposure": {
      "weight": 0.08,
      "score": 12,
      "sub_scores": {
        "2a_active_key_exposure": {
          "score": 3,
          "note": "EOA ECDSA exposure. Mainnet since 2021 accumulates cold keys."
        },
        "2b_cold_key_exposure": {
          "score": 3,
          "note": "4+ years mainnet. Cold-key horizon significant."
        },
        "2c_signature_longterm_validity": {
          "score": 3,
          "note": "ECDSA + Ed25519 + MPC all Shor-breakable."
        },
        "2d_encryption_confidentiality": {
          "score": 3,
          "note": "Standard TLS. No PQC KEM."
        }
      },
      "total_artifacts": 0
    },
    "3_metadata_privacy_exposure": {
      "weight": 0.08,
      "score": 22,
      "sub_scores": {
        "3a_tx_graph_visibility": {
          "score": 6,
          "note": "Pseudonymous EVM transparency."
        },
        "3b_rpc_mempool_concentration": {
          "score": 5,
          "note": "Decentralized sequencer pool is novel — reduces mempool concentration vs typical L2."
        },
        "3c_cross_chain_bridge_correlation": {
          "score": 6,
          "note": "ETH<->Metis bridge + sequencer rotation visible."
        },
        "3d_retroactive_deanon_risk": {
          "score": 5,
          "note": "Non-private by design."
        }
      },
      "total_artifacts": 1
    },
    "4_migration_architecture": {
      "weight": 0.15,
      "score": 35,
      "sub_scores": {
        "4a_crypto_agility": {
          "score": 10,
          "note": "Decentralized sequencer pool + Tendermint governance gives more agility than most L2s. Crypto upgrades coordinated via sequencer set."
        },
        "4b_account_abstraction_key_rotation": {
          "score": 8,
          "note": "Inherits ERC-4337 from Ethereum."
        },
        "4c_hard_fork_track_record": {
          "score": 10,
          "note": "Multiple upgrades including decentralized sequencer rollout (2024)."
        },
        "4d_hybrid_deployment_readiness": {
          "score": 7,
          "note": "No hybrid PQC plan but MPC infrastructure provides relevant experience with multi-sig schemes."
        }
      },
      "total_artifacts": 2
    },
    "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": 8,
      "sub_scores": {
        "6a_wallet": {
          "score": 2,
          "top3": [
            "MetaMask",
            "Rabby",
            "Trust Wallet"
          ],
          "pqc_roadmap_count": 0
        },
        "6b_bridge": {
          "score": 2,
          "top3": [
            "Metis Native Bridge",
            "LayerZero",
            "Connext"
          ],
          "pqc_roadmap_count": 0
        },
        "6c_custodian": {
          "score": 2,
          "top3": [
            "Fireblocks (research only)",
            "BitGo",
            "Coinbase Custody"
          ],
          "pqc_roadmap_count": 0
        },
        "6d_rpc_hsm": {
          "score": 2,
          "top3": [
            "Metis RPC",
            "Ankr",
            "QuickNode"
          ],
          "pqc_roadmap_count": 0
        }
      },
      "total_artifacts": 0
    },
    "7_governance_coordination": {
      "weight": 0.1,
      "score": 32,
      "sub_scores": {
        "7a_validator_stake_distribution": {
          "score": 8,
          "note": "Decentralized sequencer pool (rolled out 2024) — genuinely permissioned set of sequencers."
        },
        "7b_upgrade_cadence_under_pressure": {
          "score": 9,
          "note": "Decentralized sequencer launch is a major coordination precedent."
        },
        "7c_named_coordination_lead": {
          "score": 8,
          "note": "Metis Foundation (Elena Sinelnikova). No named PQC lead."
        },
        "7d_adversarial_coordination_precedent": {
          "score": 7,
          "note": "Sequencer pool design responds to L2 centralization concerns."
        }
      },
      "total_artifacts": 2
    }
  },
  "gates": {
    "hybrid_deployment": "FAIL",
    "evidence_reconstruction": "PASS",
    "primitive_naming": "PASS"
  },
  "caps_applied": [
    "Mosca (5a<20% → QRI max 60)",
    "Sutor (5d=0 → Migration Stage max 2)",
    "Preskill (several dims <3 artifacts × 0.5)",
    "Casado (4 vendor tiles pqc=0 → migration_stage max 3)",
    "Hybrid gate FAIL → QRI cap 60"
  ],
  "qri": {
    "raw": 14,
    "after_caps": 14,
    "ci_plus_minus": 11,
    "band": 2,
    "band_name": "Acknowledged"
  },
  "migration_stage": 0,
  "mosca_inequality": {
    "X_signature_shelf_life_years": "7-12 (4+ years mainnet)",
    "Y_migration_time_years_range": "8-12 (decentralized sequencer coordination advantage)",
    "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": 85,
      "privacy_preserved_pct": 70
    },
    "arrives_slowly_mid_migration": {
      "value_preserved_pct": 40,
      "privacy_preserved_pct": 30
    }
  },
  "burn_vs_rescue_policy": "undeclared",
  "pqc_washing_ratio": 1,
  "vendor_tile_summary": {
    "wallet": {
      "top3": [
        "MetaMask",
        "Rabby",
        "Trust Wallet"
      ],
      "pqc_roadmap_count": 0
    },
    "bridge": {
      "top3": [
        "Metis Native Bridge",
        "LayerZero",
        "Connext"
      ],
      "pqc_roadmap_count": 0
    },
    "custodian": {
      "top3": [
        "Fireblocks",
        "BitGo",
        "Coinbase Custody"
      ],
      "pqc_roadmap_count": 0
    },
    "rpc_hsm": {
      "top3": [
        "Metis RPC",
        "Ankr",
        "QuickNode"
      ],
      "pqc_roadmap_count": 0
    }
  },
  "narrative_summary": "Metis is an OP-derived L2 with a decentralized sequencer pool (Tendermint+MPC) — one of the few L2s with a permissionless block-producer set. The decentralization makes Metis better-positioned for coordinated crypto upgrades than typical single-sequencer L2s. No PQC activity. Band 2 Acknowledged.",
  "evaluator_notes": "Decentralized sequencer pool is a genuine migration architecture positive — it mirrors L1-style validator coordination at the L2 layer. MPC experience gives some relevant operational surface for eventual threshold PQ sigs.",
  "narrative_voiced": "Metis did the boring, expensive thing most L2s avoided: it decentralised the sequencer. That gives it something no other OP-family L2 in this batch has, which is a set of block producers that already know how to agree on crypto changes. The hard part is built."
}