Evidence row 119560

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/construction/concrete"
    ]
  ],
  "name": "Saylor Innovations  Concrete Vol",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:construction:concrete",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
          "memo": "saylor:construction:concrete",
          "reference": "9rzjqoyfctghjyYQaLPb743km1Etm6fuypP36fEFqgGa",
          "session": "eyJhcnRpY2xlSWQiOiJjb25zdHJ1Y3Rpb246Y29uY3JldGUiLCJyZWZlcmVuY2UiOiI5cnpqcW95ZmN0Z2hqeVlRYUxQYjc0M2ttMUV0bTZmdXlwUDM2ZkVGcWdHYSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyMTU1MDkzMjY5fQ.Z5KFOlw7444ZQPHz4p8TqPRkiQTctg3BQbqv9Njluug"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Concrete volume estimate for a rectangular pour with waste allowance - cubic meters and liters",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "depth_m": "0.1",
              "length_m": "5",
              "waste_percent": "10",
              "width_m": "3"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "depth_m": 0.1,
              "estimated_volume_m3": 1.65,
              "length_m": 5,
              "scope_note": "Quantity estimate only; site practice varies.",
              "waste_percent": 10,
              "width_m": 3
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "POST",
                    "PUT",
                    "PATCH",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "depth_m": {
                      "description": "required positive depth meters (query)",
                      "type": "string"
                    },
                    "length_m": {
                      "description": "required positive length meters (query)",
                      "type": "string"
                    },
                    "waste_percent": {
                      "description": "required non-negative waste allowance percentage (query)",
                      "type": "string"
                    },
                    "width_m": {
                      "description": "required positive width meters (query)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "length_m",
                    "width_m",
                    "depth_m",
                    "waste_percent"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "depth_m": {
                      "description": "Depth, in metres",
                      "type": "number"
                    },
                    "estimated_volume_liters": {
                      "description": "Estimated volume liters",
                      "type": "number"
                    },
                    "estimated_volume_m3": {
                      "description": "Estimated volume m3",
                      "type": "number"
                    },
                    "formula": {
                      "description": "Formula used for the calculation",
                      "type": "string"
                    },
                    "length_m": {
                      "description": "Length, in metres",
                      "type": "number"
                    },
                    "scope_note": {
                      "description": "What this data covers and what it leaves out",
                      "type": "string"
                    },
                    "waste_percent": {
                      "description": "Waste allowance as a percentage",
                      "type": "number"
                    },
                    "width_m": {
                      "description": "Width, in metres",
                      "type": "number"
                    }
                  },
                  "required": [
                    "length_m",
                    "width_m",
                    "depth_m",
                    "waste_percent",
                    "estimated_volume_m3",
                    "scope_note"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-16T12:49:33.36Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-16T12:49:32.125Z"
    },
    "resource": "https://saylorinnovations.com/api/construction/concrete",
    "serviceName": "Saylor Innovations  Concrete Vol",
    "tags": [
      "construction",
      "concrete",
      "paint",
      "tile",
      "materials"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Concrete volume estimate for a rectangular pour with waste allowance - cubic meters and liters"
}

What the leaf hashes

{"body":"fd7736e443a42da33977cfe443175390d5f6891667011f767c2e9a1f5cec4f2f","id":119560,"kind":"listing","method":"baseline/1","observed_us":1793025615914090,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/construction/concrete","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. 0x1b53e28a6297c9a4b1944bb32e45291c8b13ba02cffcd45e69431067c0465255
2. 0xcf3ce34e43178f0b42db170fc93e9c70f8f99f5ff97962dfd70351058a94ee9c
3. 0xb46eb9f0520226d4fb9d10e86a505d8f1d799ccb3a50d994f0c198fc08f5bbc9
4. 0xd61630da940a7c4b6f54ee8fb065c534b2c0c56e45a6d74b4d7de65473c75d18
5. 0xadc590438cecef3def474e5812cad5a5517fd1f210390d19451b20b5f5ff765d
6. 0xc1db76ad860114e5c5c4c08992875765d92bf92b44dff2e43c2d5d96a67dc06d
7. 0x3af7a10fd79e37c78b6264bdd9d5053d5277a426a77822d9be98eb4c2c1512b4
8. 0xcc08c63a45305f8c66c8d5eb15ad0b3cc315f48dff3fa7691c4bc550ebe2cc8a
9. 0x446db60ab162f3a366dec6ef2c3546bed38d915c11a8c5c26bb495d5ec3c252a
10. 0xc9368fba7f6c13346c8b2c9c7a63691d3d68f63c71d1ec0d7a4decd43fb3e8c4
11. 0x3f914e3a1f6c506299e42b0c551da50ec7ac2c0f0e69260eab2262111b4eb14b
12. 0x7ab2e7902b312a74cfdbc32b2906ced29b1fb9dc4280b5378e8eb181ad88686e
13. 0xe00c7829e46541e49a308807d357db902e06eff941a833217a8f0dbccd3964f1
14. 0x770e4376196188c7fc9ec40f8e218dc0d1cb92bba5fe0425a0edce27ca9a997f
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae