{
  "chain_slug": "blast",
  "name": "Blast",
  "scorecard_profile": "rollup-L2",
  "evaluated_at": "2026-04-18",
  "evaluator": "layerqu-v2-scoring-agent-1",
  "v1_reference": "chainscreen-v1-archive",
  "dimensions": {
    "1_cryptographic_exposure": {
      "weight": 0.12,
      "score": 24,
      "sub_scores": {
        "1a_primitive_inventory": {
          "score": 8,
          "primitives_named": [
            "ECDSA secp256k1 (inherited Ethereum)",
            "Keccak-256",
            "BLS12-381 (Ethereum L1 settlement)"
          ],
          "evidence": [
            "https://docs.blast.io"
          ],
          "note": "Optimistic rollup. Native yield via DeFi integration adds no new crypto primitives."
        },
        "1b_shor_grover_pq_tag": {
          "score": 10,
          "tags": {
            "ECDSA secp256k1": "Shor-break",
            "Keccak-256": "Grover-weaken-128bit",
            "BLS12-381": "Shor-break"
          },
          "evidence": [
            "https://docs.blast.io"
          ]
        },
        "1c_algorithm_family_diversity": {
          "score": 0,
          "families_represented": 0,
          "families": [],
          "note": "No PQC families"
        },
        "1d_nist_security_category": {
          "score": 0,
          "mappings": {},
          "note": "No NIST PQC"
        },
        "1e_implementation_quality": {
          "score": 6,
          "formal_verification": "limited",
          "constant_time": "standard",
          "libraries": [
            "libsecp256k1",
            "op-geth fork"
          ],
          "evidence": [
            "https://github.com/blast-io"
          ]
        }
      },
      "total_artifacts": 1
    },
    "2_hndl_exposure": {
      "weight": 0.08,
      "score": 12,
      "sub_scores": {
        "2a_active_key_exposure": {
          "score": 3,
          "note": "Zombie-chain status limits fresh key exposure. EOA pubkeys still visible for all past users."
        },
        "2b_cold_key_exposure": {
          "score": 3,
          "note": "Young chain (March 2024); frozen 12K users during March 2025 incident."
        },
        "2c_signature_longterm_validity": {
          "score": 3,
          "note": "ECDSA signatures Shor-breakable."
        },
        "2d_encryption_confidentiality": {
          "score": 3,
          "note": "Standard TLS."
        }
      },
      "total_artifacts": 1
    },
    "3_metadata_privacy_exposure": {
      "weight": 0.08,
      "score": 10,
      "sub_scores": {
        "3a_tx_graph_visibility": {
          "score": 3,
          "note": "Transparent EVM."
        },
        "3b_rpc_mempool_concentration": {
          "score": 2,
          "note": "Centralized sequencer (Blast team)."
        },
        "3c_cross_chain_bridge_correlation": {
          "score": 2,
          "note": "Native bridge with DeFi yield integration; correlation visible on Ethereum L1."
        },
        "3d_retroactive_deanon_risk": {
          "score": 3,
          "note": "No shielded pool."
        }
      },
      "total_artifacts": 1
    },
    "4_migration_architecture": {
      "weight": 0.15,
      "score": 28,
      "sub_scores": {
        "4a_crypto_agility": {
          "score": 6,
          "note": "Custom OP Stack fork. Native yield complexity adds migration friction."
        },
        "4b_account_abstraction_key_rotation": {
          "score": 10,
          "note": "Inherits ERC-4337 infrastructure."
        },
        "4c_hard_fork_track_record": {
          "score": 7,
          "note": "Limited upgrade history; March 2025 node failure incident."
        },
        "4d_hybrid_deployment_readiness": {
          "score": 5,
          "note": "No hybrid plan; depends entirely on Ethereum L1."
        }
      },
      "total_artifacts": 1
    },
    "5_deployment_execution": {
      "weight": 0.22,
      "score": 2,
      "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 PQC in client"
        },
        "5c_validator_pqc_adoption": {
          "score": 0,
          "note": "Centralized sequencer; no PQC"
        },
        "5d_published_milestones_count": {
          "score": 0,
          "count": 0,
          "note": "no PQC milestones"
        },
        "5e_pqc_washing_delta": {
          "score": 2,
          "ratio": 1,
          "note": "No PQC announcements"
        }
      },
      "total_artifacts": 0
    },
    "6_supply_chain_vendor_readiness": {
      "weight": 0.25,
      "score": 4,
      "sub_scores": {
        "6a_wallet": {
          "score": 2,
          "top3": [
            "MetaMask",
            "Rabby",
            "Ledger HW"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        },
        "6b_bridge": {
          "score": 1,
          "top3": [
            "Native Blast Bridge",
            "LayerZero",
            "Stargate"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        },
        "6c_custodian": {
          "score": 0,
          "top3": [
            "limited institutional custody for zombie chain"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        },
        "6d_rpc_hsm": {
          "score": 1,
          "top3": [
            "Blast official RPC",
            "Ankr",
            "QuickNode"
          ],
          "pqc_roadmap_count": 0,
          "evidence": []
        }
      },
      "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": 4,
          "note": "March 2025 incident showed limitations."
        },
        "7c_named_coordination_lead": {
          "score": 8,
          "note": "Blast Foundation; Pacman (Tieshun Roquerre, Blur founder)."
        },
        "7d_adversarial_coordination_precedent": {
          "score": 3,
          "note": "97% TVL collapse signals weak coordination capability."
        }
      },
      "total_artifacts": 1
    }
  },
  "gates": {
    "hybrid_deployment": "FAIL",
    "evidence_reconstruction": "PASS",
    "primitive_naming": "PASS"
  },
  "caps_applied": [
    "mosca_cap_60",
    "sutor_stage_cap_2",
    "casado_stage_cap_3",
    "preskill_half_all_dims_low_artifacts",
    "hybrid_gate_fail_cap_60"
  ],
  "qri": {
    "raw": 8,
    "after_caps": 8,
    "ci_plus_minus": 15,
    "band": 1,
    "band_name": "Unaware"
  },
  "migration_stage": 0,
  "mosca_inequality": {
    "X_signature_shelf_life_years": "3-8 (zombie-chain context — signatures exist but activity collapsed)",
    "Y_migration_time_years_range": "10-15 (dependent on Ethereum L1 migration)",
    "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": 5
    },
    "arrives_slowly_post_migration": {
      "value_preserved_pct": 70,
      "privacy_preserved_pct": 60
    },
    "arrives_slowly_mid_migration": {
      "value_preserved_pct": 35,
      "privacy_preserved_pct": 20
    }
  },
  "burn_vs_rescue_policy": "undeclared (dependent on Ethereum L1 policy)",
  "pqc_washing_ratio": 1,
  "vendor_tile_summary": {
    "wallet": {
      "top3": [
        "MetaMask",
        "Rabby",
        "Ledger HW"
      ],
      "pqc_roadmap_count": 0
    },
    "bridge": {
      "top3": [
        "Native Blast Bridge",
        "LayerZero",
        "Stargate"
      ],
      "pqc_roadmap_count": 0
    },
    "custodian": {
      "top3": [
        "limited"
      ],
      "pqc_roadmap_count": 0
    },
    "rpc_hsm": {
      "top3": [
        "Blast official RPC",
        "Ankr",
        "QuickNode"
      ],
      "pqc_roadmap_count": 0
    }
  },
  "narrative_summary": "Blast is an Optimistic Rollup that collapsed 97% from $2.7B TVL peak to ~$55M zombie status. Custom OP Stack fork with native yield mechanism. Zero PQC activity; quantum migration entirely gated by Ethereum. March 2025 node failure froze 12K users, exposing fragility.",
  "evaluator_notes": "Zombie-chain status — Preskill cap applied across most dims. Weak governance coordination likely means PQC migration will only occur if Ethereum forces it.",
  "narrative_voiced": "Blast is a zombie-chain on ECDSA secp256k1 that already failed its own stress test. 97% of the TVL has left, a node failure froze 12K users, and the crypto migration plan is to hope Ethereum drags it along. There is no coordination capability left to migrate anything."
}