Evidence row 2202071

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://construction-calc.x402tookit.com/tile-calc"
    ]
  ],
  "name": "Construction 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": "Tiles needed for a floor or wall from area or room size, tile size, grout gap and waste, plus boxes if you give tiles per box.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "areaSqFt": 100,
              "groutGapIn": 0.125,
              "tileHeightIn": 12,
              "tileWidthIn": 12,
              "wastePct": 10
            },
            "type": "http"
          },
          "output": {
            "example": {
              "areaSqFt": 100,
              "asOf": "2026-10-11T14:25:14.194Z",
              "boxes": null,
              "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.",
              "exactTiles": 97.94877,
              "extraTilesBought": null,
              "notChecked": [
                "cuts around fixtures, borders, niches and the layout pattern",
                "tile lot and shade differences (buy all from one lot, plus a spare box)",
                "…2 more"
              ],
              "reasons": [
                "Each tile occupies (width + joint) x (height + joint) once grout lines are included.",
                "Waste covers cuts and breakage; add a spare box for future repairs."
              ],
              "source": "computed locally",
              "summary": "108 tiles (97.949 exact, +10% waste) for 100 sq ft of 12 x 12 in tile with a 0.125 in joint.",
              "tileCoverageSqFtEach": 1.020942,
              "tilesPerBox": null,
              "tilesWithWaste": 108,
              "verdict": "ESTIMATE",
              "wastePct": 10
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "areaSqFt": {
                      "description": "Area in square feet (or give lengthFt and widthFt)",
                      "type": "number"
                    },
                    "groutGapIn": {
                      "description": "Grout joint in inches, default 0.125",
                      "type": "number"
                    },
                    "lengthFt": {
                      "description": "Length in feet",
                      "type": "number"
                    },
                    "tileHeightIn": {
                      "description": "Tile height in inches",
                      "type": "number"
                    },
                    "tileWidthIn": {
                      "description": "Tile width in inches",
                      "type": "number"
                    },
                    "tilesPerBox": {
                      "description": "Tiles in a box, to get the box count",
                      "type": "integer"
                    },
                    "wastePct": {
                      "description": "Waste, default 10 (use 15 to 20 for diagonal or patterned)",
                      "type": "number"
                    },
                    "widthFt": {
                      "description": "Width in feet",
                      "type": "number"
                    }
                  },
                  "required": [
                    "tileWidthIn",
                    "tileHeightIn"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "areaSqFt": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "boxes": {},
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "exactTiles": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "extraTilesBought": {},
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "tileCoverageSqFtEach": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "tilesPerBox": {},
                    "tilesWithWaste": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "wastePct": {
                      "type": [
                        "null",
                        "number"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:44:03.01Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:44:02.844Z"
    },
    "resource": "https://construction-calc.x402tookit.com/tile-calc",
    "serviceName": "Construction Calculators",
    "tags": [
      "tile",
      "flooring",
      "grout",
      "estimating"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Tiles needed for a floor or wall from area or room size, tile size, grout gap and waste, plus boxes if you give tiles per box."
}

What the leaf hashes

{"body":"1091758628bfe098bade169518307752d07cfc8dc1412f0e7b40df4453b3f484","id":2202071,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646812393801,"prev":null,"subject":"x402_bazaar:https://construction-calc.x402tookit.com/tile-calc","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. 0x580ce4d3c33f053f1782db9a4d285359d301f102d4dcf5156ffd05e83a0caee6
2. 0xbe0f3cf33a0d65484e9a1c06de6c4809e612ba050626c3ab738ec44e2d4c2752
3. 0x01ef4c284957005eaf57d0bbef6d546871736614a5ef85b769e22d68ae2f251d
4. 0xa8311f865bba63781cf56e01fe880c65b3974c083f9faebf14c34b6bdf958c0e
5. 0xd1e8e0ccfa227ef022a551bec78c0509f29fcef87d7a8e95b8ec229f523e3c44
6. 0xae40be4eac6ea865e5340ca01605eeaec26f7184a4a196c59aaedad4c817b922
7. 0x16035ad5079f6bbb7077630f9d8e39645fc97408e7563f6a3ae265e2534687d9
8. 0x0cf3821eab02df79fc88c7dbd3761efba75375d4c6f9c7ce294c27ede3c32598
9. 0x882c8192c148aa82abca3d03cb5ceafc102134e018c6a64482ff1134474bd087
10. 0x4503a7adf4e82cac87795881631f82f8895baf13b897831c8e22a35911b98dc9
11. 0xbd8c11f62d609bf3ed93b9a17435c97579361d23e3300a0dde72b85f00ef3652
12. 0x8d78c6f91f0a0c782b9c9f61136a2d39249651d60823d7dd99828d8f91c418ca
13. 0x4156d0c5ab6447dc36720ca7ceb2f5a0f0c5620d9192ea6d8fcf5e704e8dda41
14. 0xc73349c9955998a166e6e5920ac8ee0aa7bc6c9d66bace60f6dbd465dd9e0530
15. 0x52242d46cadab5f421a6f86c1edc6379b085ae98482fa80904e4a3028c1849a3
16. 0x1068659ec8f2bcf26e4ad39786557a8c45d60e5ebba4fce2fb9962b2c9c59920
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af