Evidence row 2201947

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://electrical-calc.x402tookit.com/wire-resistance"
    ]
  ],
  "name": "Electrical 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": "Wire resistance R = rho L / A for copper or aluminium at a temperature, or correct a known resistance to a new temperature.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "lengthM": 100,
              "material": "copper",
              "sizeMm2": 2.5,
              "temperatureC": 75
            },
            "type": "http"
          },
          "output": {
            "example": {
              "alphaPerC": 0.00393,
              "areaMm2": 2.5,
              "asOf": "2026-10-21T06:22:29.744Z",
              "conductor": "2.5 mm2",
              "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.",
              "lengthM": 100,
              "material": "copper",
              "notChecked": [
                "ampacity or insulation temperature rating (no NEC or IEC tables are included: consult the code)",
                "skin and proximity effect at high frequency or large conductors",
                "…2 more"
              ],
              "reasons": [
                "Typical values at 20 C: copper resistivity 1.724e-8 ohm m, temperature coefficient 0.00393 per C.",
                "R = rho x L / A with rho(T) = rho20 x (1 + alpha (T - 20))."
              ],
              "resistanceAt20COhm": 0.6896,
              "resistanceAtTemperatureOhm": 0.838657,
              "resistanceOhmPerKmAtTemperature": 8.38657,
              "resistivity20COhmM": 1.724e-8,
              "resistivityAtTemperatureOhmM": 2.096643e-8,
              "source": "computed locally (R = rho L / A; R2 = R1 (1 + alpha (T2 - T1)), copper alpha 0.00393 per C at 20 C)",
              "summary": "2.5 mm2 copper, 100 m: 0.838657 ohm at 75 C (0.6896 ohm at 20 C).",
              "temperatureC": 75,
              "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": {
                    "awg": {
                      "description": "American wire gauge such as 14 or 2/0 (or send sizeMm2)",
                      "type": "string"
                    },
                    "fromTemperatureC": {
                      "description": "Temperature in degrees C at which resistanceOhm was measured (default 20)",
                      "type": "number"
                    },
                    "lengthM": {
                      "description": "Wire length in metres (with sizeMm2 or awg), for R = rho L / A",
                      "type": "number"
                    },
                    "material": {
                      "description": "copper or aluminium",
                      "type": "string"
                    },
                    "resistanceOhm": {
                      "description": "Known resistance in ohms at fromTemperatureC, to correct to toTemperatureC",
                      "type": "number"
                    },
                    "sizeMm2": {
                      "description": "Conductor cross-section in mm2 (or send awg)",
                      "type": "number"
                    },
                    "temperatureC": {
                      "description": "Wire temperature in degrees C for the geometry result (default 20)",
                      "type": "number"
                    },
                    "toTemperatureC": {
                      "description": "Temperature in degrees C to correct resistanceOhm to",
                      "type": "number"
                    }
                  },
                  "required": [
                    "material"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "alphaPerC": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "areaMm2": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "conductor": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "lengthM": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "material": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "resistanceAt20COhm": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "resistanceAtTemperatureOhm": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "resistanceOhmPerKmAtTemperature": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "resistivity20COhmM": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "resistivityAtTemperatureOhmM": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "temperatureC": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:51:27.948Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-01T22:51:27.787Z"
    },
    "resource": "https://electrical-calc.x402tookit.com/wire-resistance",
    "serviceName": "Electrical Calculators",
    "tags": [
      "wire",
      "resistance",
      "temperature",
      "electrical"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Wire resistance R = rho L / A for copper or aluminium at a temperature, or correct a known resistance to a new temperature."
}

What the leaf hashes

{"body":"6b21db4067f8392e9d52f47e707b2147afc4e1e22ebdf4380547f029e7716c72","id":2201947,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810969307,"prev":null,"subject":"x402_bazaar:https://electrical-calc.x402tookit.com/wire-resistance","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. 0x6e6c702e1d2902fcc730ffc1c2e0e36c0cde11fbf652d7fd22fac0ee649b2e5a
2. 0x93ebdea42f701d7e128eb3aab8db6c532ce55d501579be3f724e01befc2ecd38
3. 0xf7272e8705593b24a3ba755989a1d359e368ea36f89282e26b7921144598f394
4. 0x69ed6c4aaa5012b85f67960a0fa9ae8fb6b0e35f4c903e90fdd95ec2b0f2a860
5. 0xc67f65e39cd0c90d79d031adae13c83ce43134c07416ccfbe7076c181f1b76da
6. 0x8fc9c1ace4ea6fcd08cdb1010c9130a48a852c2c13d92bd0d05da1d51b779671
7. 0x227e9c6d126068549be5745fd1604a266d2f6a1d6529a14c775fd41e8110d4ab
8. 0x48943f14c0bfc9907c2be6ee87012f4466ef21725aa4b65354c2ef089a85f8a4
9. 0xf0da9e2daa9690337905b07d6d00ecb1873cbea8e67a2bc9597ed164320ea352
10. 0xfb6e19201a7e7f6f8b193ab61c1f71fcee4adfcc0054afd2e2a9e1bc86fc15d4
11. 0x397eb424ec9152f7b06395c903784c3d0d5aa7422c53711710d436bd1c3da79f
12. 0xa95c0aa60c534c116ea78dfa73cda3218c070929dd80984b74bd130bc0058f60
13. 0x9e9a25a642137f47c2c84b5e744fe2a673304740cc0eb165018b100bc5cbaf0c
14. 0xb903742c059190ddedc375958f73db84c3806732f1e54330407245d4734015f5
15. 0x2cdc73dde4ed839d7482b6b91833e64bef56c7626db8439f3bbdfcffd2ae32a3
16. 0x0e5696ae625571c52ddcd8dc09aa6c994b4ab38f2086df20d56f1f01c603e501
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af