Evidence row 2202124

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://chemistry-calc.x402tookit.com/dilution"
    ]
  ],
  "name": "Chemistry Calculators",
  "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": "Dilution equation C1 x V1 = C2 x V2: give any three values and get the fourth, plus solvent to add and the dilution factor.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "c1": 12,
              "c2": 1,
              "v2": 500
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T08:45:38.415Z",
              "c1": 12,
              "c2": 1,
              "degraded": false,
              "dilutionFactor": 12,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "notChecked": [
                "volume changes when mixing some solvents (volumes are not always additive: always dilute to the mark)",
                "safety: add concentrated acid to water, never the reverse, and follow lab procedure",
                "…1 more"
              ],
              "reasons": [
                "C1V1 = C2V2 holds because the amount of solute is unchanged.",
                "Add the stock to part of the solvent, mix, then top up to the final volume mark."
              ],
              "solventToAdd": 458.3333333,
              "source": "computed locally",
              "stockFraction": 0.08333333333,
              "summary": "C1 12 x V1 41.6667 = C2 1 x V2 500: take 41.6667 of stock and add solvent up to 500 (add about 458.333); dilution factor 12x.",
              "v1": 41.66666667,
              "v2": 500,
              "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": {
                    "c1": {
                      "description": "Stock concentration (any unit)",
                      "type": "number"
                    },
                    "c2": {
                      "description": "Final concentration (same unit as c1)",
                      "type": "number"
                    },
                    "v1": {
                      "description": "Stock volume taken (any unit)",
                      "type": "number"
                    },
                    "v2": {
                      "description": "Final volume (same unit as v1)",
                      "type": "number"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "c1": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "c2": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "dilutionFactor": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "solventToAdd": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "stockFraction": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "v1": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "v2": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:41:22.181Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:41:21.928Z"
    },
    "resource": "https://chemistry-calc.x402tookit.com/dilution",
    "serviceName": "Chemistry Calculators",
    "tags": [
      "chemistry",
      "dilution",
      "molarity",
      "lab"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Dilution equation C1 x V1 = C2 x V2: give any three values and get the fourth, plus solvent to add and the dilution factor."
}

What the leaf hashes

{"body":"94fe36f2999fe0acffff9379a4d8bd52702a904c9b8db9296676559e0cb4573e","id":2202124,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646812563226,"prev":null,"subject":"x402_bazaar:https://chemistry-calc.x402tookit.com/dilution","subject_kind":"source_record"}

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. 0x5eef2e98c51e43ff08e711e5e61b17d4514cbbb75b580960754f8da0736ada44
2. 0xa6f541fa9b02f5901fbff8db8c561593a389f97cec54ad14c18b4fd5f0464308
3. 0x5d821513500c3096a6c26e3d9ff5087f74f6239fa3679b8bd86c52e5c276cfc5
4. 0x73cbbb0b0894b7a213c91f313fd7f2539e2342ec007bfbe7e8ed53dd5d310471
5. 0x81c7b856674b495f14d9353695a73a4b166f188742644419e13e757058e4b5dd
6. 0x58fb67d34e8cb29452a98150552bfce71fc203e7517f4adb30364e2e58ede748
7. 0xdb1fc5f916f457a62007737eb5183a2d3ceb15fcc66d4b00a5cf219d4beb613b
8. 0x92bbaa9b2f1246b2358d4191b0cf3714eca93cedb5713c2e96a0022b4960db28
9. 0x8189e6dc4676b3ae5152f796b037ade6d169cd767b398c48e8198c0942227551
10. 0x15b6fa53a1794c49aa68f20be1be4cd23c2c0914da73fb1d1251dd024cf3a9ee
11. 0xbf3f0fd5fa0700fe26a6965035afc77961bd3271df22bdeaf954ee14db8a9831
12. 0xf22eed74e06b82fc2a964f9eaba6330ee509c52339b4be9824a1720eb2cb0cee
13. 0xd7d3bfe4670fa6bdde44d198ca661840b2abfe18e9099f606cc8dbc11ac3c436
14. 0x6ae97c2bdc679e3326a739627f6c3a307d7e25e547b9bf23dbf2622fb26d858e
15. 0x23f4763e8db2efe57fbc28dfc68f2b97b65f54a03425994e68157763af649a50
16. 0x0e5696ae625571c52ddcd8dc09aa6c994b4ab38f2086df20d56f1f01c603e501
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af