Evidence row 2201269

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://grades-calc.x402tookit.com/grade-curve"
    ]
  ],
  "name": "Grades & Study Calc",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Curve test scores by adding points, scaling so the top score is 100, or the square-root method, with before and after averages.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "method": "sqrt",
              "scores": "60,70,80,90"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-12T01:53:42.011Z",
              "averageAfter": 86.36,
              "averageBefore": 75,
              "capped": true,
              "degraded": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "highestAfter": 94.87,
              "highestBefore": 90,
              "method": "sqrt",
              "notChecked": [
                "your teacher's actual curving policy",
                "bell-curve (z-score) grading, which depends on the whole class distribution",
                "…1 more"
              ],
              "reasons": [
                "Curved score = 10 x square root of the score, which helps low scores most."
              ],
              "scores": [
                {
                  "change": 17.46,
                  "curved": 77.46,
                  "original": 60
                },
                {
                  "change": 13.67,
                  "curved": 83.67,
                  "original": 70
                }
              ],
              "source": "computed locally (three standard curving methods)",
              "summary": "sqrt: average 75 becomes 86.36.",
              "verdict": "COMPUTED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "cap": {
                      "description": "false to allow results above 100 (default true caps at 100)",
                      "type": "string"
                    },
                    "method": {
                      "description": "add, scale-to-top or sqrt",
                      "type": "string"
                    },
                    "points": {
                      "description": "Points to add for method add (default 5)",
                      "type": "number"
                    },
                    "scores": {
                      "description": "Comma-separated scores out of 100 (up to 200)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "scores",
                    "method"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
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                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
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                        "string"
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                    },
                    "averageAfter": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "averageBefore": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "capped": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "highestAfter": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "highestBefore": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "method": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "scores": {
                      "items": {
                        "properties": {
                          "change": {
                            "type": [
                              "null",
                              "number"
                            ]
                          },
                          "curved": {
                            "type": [
                              "null",
                              "number"
                            ]
                          },
                          "original": {
                            "type": [
                              "null",
                              "number"
                            ]
                          }
                        },
                        "type": "object"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
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                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
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                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
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                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-02T04:06:53.158Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-02T04:06:52.991Z"
    },
    "resource": "https://grades-calc.x402tookit.com/grade-curve",
    "serviceName": "Grades & Study Calc",
    "tags": [
      "grades",
      "curve",
      "scores",
      "teacher"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Curve test scores by adding points, scaling so the top score is 100, or the square-root method, with before and after averages."
}

What the leaf hashes

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Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0xaaf32c187e6bb7d2a008aab21d40c5ddddb5663a2c33493580836fa5610221a3
2. 0xcc822873064fab9c28cdbf4c09690b23f471cc0745e018697425684382e98c91
3. 0xb3b8c26b563d659676eaaf281109b379c7dc9b70c4c766a62e7ec9ec37e38b89
4. 0xde00f1bb15f75d655b47ea976766eea91d7e999083ec051b3984678f2fd28312
5. 0x279ba544420a73d88d8f308b4d09435c8c2f23709f6be67d70c1a10a0acb980d
6. 0x66c75e25a773e8f9801506512f6592bafc55dd4e8c68342bb257033d6c99946e
7. 0xfc00cc56d5bee928ef0d2a6133f4d9d5ad18bfaa76550099848a1cbb99170aa3
8. 0x0598b3dc13fd50d058b475e7a4075e45fc70ef551326eddf8f729ab0c846cc9a
9. 0x57500e0c1b66dd137d2dcd79ba099e15ff6602207eff2458479be153688203c2
10. 0x8e5ef8feb575d728f3a801ee5ed7127a8ed46a03ff6e615584cabe2a29c77085
11. 0x0b0599cdafc51aeb51303712d6352904fa882f3025c5a86e9ca3f2735585c32f
12. 0x8cc79a806621c6c78dfbbdd21d793ebf9fe2942c16ff8fcfabfae8b921d58fb4
13. 0x0a8f32fa56d4ddb69ff176883beda0b0217f66ec9bd09c11cec95d7ba5f6c70a
14. 0x27deeb1ef1692b4773e73c16b6d8d0cdf4251fe2660821e5336f57539770fd2f
15. 0x793184605629cd36ba80a07cbe115ca35e8923297bf024260c6f5c06b255f638
16. 0x2922573a524a0694086782ac45fa3083d3fc3f6a2a479b2105e1e2f06b2916f7
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af