Evidence row 72547

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://combinatorics.openverbs.com/v1/factorial"
    ]
  ],
  "name": "Factorial",
  "owner_address": "0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
        "scheme": "exact"
      }
    ],
    "description": "Exact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "n": "42"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "n": {
                      "description": "Non-negative integer ≤ 20000.",
                      "pattern": "^\\d+$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "n"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-02T01:47:35.106Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-02T01:47:34.818Z"
    },
    "resource": "https://combinatorics.openverbs.com/v1/factorial",
    "serviceName": "Factorial",
    "tags": [
      "factorial api",
      "compute factorial",
      "n factorial",
      "exact factorial",
      "bigint factorial"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Exact factorial n! for 0 ≤ n ≤ 20000, returned as a decimal string with its digit count."
}

What the leaf hashes

{"body":"38ebc92dfd3b185a95d2cff728d4896c4e899af0ee65ee31deb570ce5e792d3f","id":72547,"kind":"listing","method":"baseline/1","observed_us":1793025486197678,"prev":null,"subject":"x402_bazaar:https://combinatorics.openverbs.com/v1/factorial","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. 0x12e496271744f321ba4167fb65661a99f717f29d4d4d8bcafb639ba0bc3b2492
2. 0x7282de5af538eec294d673041e21c8cf6d91baea1b2dba61ad0f0299e64e4d87
3. 0x6cf782a31777640faa6142ee1e30f5e93cdbaa7070c49d0ce504b3b341808683
4. 0x2bb2506bfc6d99c779ba72fd5c3c413f6c60ef3c60b1fddde129adee9ee51cfd
5. 0xd6aae0277c00f03bc5cdd2ead8322f304638a91d6e70512d8571cbbd4089c8ad
6. 0xe26eaefc9250c02ae3c50a61f74472f736958672a6cfcd611c17a390ae19d5d6
7. 0xf751758ca1cd4a93383e10347f3348fb2cc84cbe1ac847d550cdce07a035fcb0
8. 0x1190953fb1d7834a2321eecd7a50c4e687ea4e949658aed4541ab16a2acf09f9
9. 0xbf2856fb609a9a271a639d796f55f6a35567f475741e7f8ea37be87665d74132
10. 0x82c27b8a0cc799b1b8e2ae127f363936ba1a6e1a5d43001849ff8f1e205dc950
11. 0x9d19085bdd0cb9322cb235f88ed9fb666f1b60fe7afec1170ec05f633673830a
12. 0x7e390200ea1ea25db5884cf05fa50ad599f0759b573f081e361cc22f7206133c
13. 0xff1c28bdf595a3d1333e9915edc68e9c5fded7bd5923fa85870979af34cbc3b3
14. 0xb49e8c2564256e5322e375cb619d9ac70fd17c1d1eba9c991bba4cb6428f45cc
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae