Evidence row 116726

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://material.halowerk.com/cable-mass"
    ]
  ],
  "name": "cable_conductor_mass",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "asset": "USDC",
          "assetTransferMethod": "eip3009",
          "eip712Domain": {
            "chainId": 8453,
            "name": "USD Coin",
            "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "version": "2"
          },
          "name": "USD Coin",
          "network_name": "Base Mainnet",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "scheme": "exact"
      }
    ],
    "description": "Conductor mass is calculated from nominal cross-section, core count and length against the material density; for a nominal cross-section this is exact and independent of stranding. Total cable mass and the copper share are returned as a range derived from published manufacturer weight tables per cross-section band, not as a type-test value. Insulation, filler and armour are not modelled individually.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "bodyType": "json",
            "exampleUrl": "https://material.halowerk.com/cable-mass/schema#/requestExample",
            "method": "POST",
            "schemaUrl": "https://material.halowerk.com/cable-mass/schema#/inputSchema",
            "type": "http"
          },
          "output": {
            "example": {
              "assumptions": [
                "Conductor mass uses the nominal cross-section; stranded and solid conductors of the same nominal size are treated alike.",
                "Total cable mass is a range from published weight tables per cross-section band, not a type-test value.",
                "Filler, armour and screens other than a stated concentric conductor are not modelled."
              ],
              "band_used": "klein",
              "cable_mass_kg_estimate": {
                "high": 12.096,
                "low": 8.87
              },
              "cable_type": "NYM-J",
              "concentric_conductor_mass_kg": null,
              "conductor_mass_kg": 4.032,
              "conductor_mass_kg_per_m": 0.0403,
              "conductor_material": "copper",
              "conductor_share_percent": {
                "high": 45.5,
                "low": 33.3
              },
              "cores": 3,
              "cross_section_mm2": 1.5,
              "density_g_per_cm3": 8.96,
              "length_m": 100,
              "mass_ratio_used": {
                "high": 3,
                "low": 2.2
              },
              "method": "geometry x density, sheath factor by cross-section band",
              "sheath": "PVC",
              "standard": "VDE 0250-204",
              "unavailable_fields": []
            },
            "exampleUrl": "https://material.halowerk.com/cable-mass/schema#/outputExample",
            "schemaUrl": "https://material.halowerk.com/cable-mass/schema#/outputSchema",
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": true,
          "properties": {
            "input": {
              "additionalProperties": true,
              "properties": {
                "bodyType": {
                  "const": "json"
                },
                "exampleUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "method": {
                  "const": "POST"
                },
                "schemaUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": true,
              "properties": {
                "exampleUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "schemaUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T18:55:52.669Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-25T18:55:52.265Z"
    },
    "resource": "https://material.halowerk.com/cable-mass",
    "serviceName": "cable_conductor_mass",
    "tags": [
      "recycling",
      "copper",
      "cable"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Conductor mass is calculated from nominal cross-section, core count and length against the material density; for a nominal cross-section this is exact and independent of stranding. Total cable mass and the copper share are returned as a range derived from published manufacturer weight tables per cross-section band, not as a type-test value. Insulation, filler and armour are not modelled individually."
}

What the leaf hashes

{"body":"9a58dbb22841278e96ceecd8385deea8195ad5453596b721a1e1257ca66b3e6b","id":116726,"kind":"listing","method":"baseline/1","observed_us":1793025610210209,"prev":null,"subject":"x402_bazaar:https://material.halowerk.com/cable-mass","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xcf514510a9c8fdc251b6e6a5f90c04984e66856ff4cf51d4db8639e52a6e4a9b
2. 0x80f4771e1883aeb0c79d898e6b447fb4f4e698c93e9ad5071c94c180435a1262
3. 0x0f31ab5d60977b8e13919fec0380f1e66f12f4b5be9de49847b86aeb67d40475
4. 0xee781b4dc50d961f69d50898eeef5e2897158fb33651294441f1e61bea70353a
5. 0xf4bbd0badd6093a7f9c954f4f8ff63f683aae4b26857958624aafe5e58523ddf
6. 0x67a8e1e9fcf5fabc4da48e3a321c457eddb2deb8c75354b31499221eb8a6f36a
7. 0x32c1f5d0ccec3cb77f81b13d9f16f695affe42dabde30f2c9100c451824fe5a9
8. 0x3e8d0f97e1f920a1cf4d72dbff493dbb14c9d4eb5f1a99ac832ffdd74312167b
9. 0xd9144ff9b4aa9bef9059244c38ed5bc666a8c517855db69a2e2c6d406ea5aa5c
10. 0x0244cbadd0e376dcf6cef79a0029830243a55cdb0c50f8a6794baf68150f943d
11. 0x207f4447ed1f515deb649bcfed4e5e49ab2ac52233bfac09df6fa492c34ac758
12. 0x3f401930661bff9a668037b662b5b8766fa60035f100a3e9fc585c576d892ffa
13. 0xe43762a621da83c0b4b63f549cd2e19c428ac702bfc1038d70233867b06c447f
14. 0xefabf1105e09cf52c12c58e60cbb5048b9ac3f02631d1816a926e14bdd86fbdf
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae