Evidence row 752005

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://wafermap.xyz/v1/gemma-4"
    ]
  ],
  "name": "wafermap.xyz/v1/gemma-4",
  "owner_address": "0xefa0fdf4ca8fd79227fb9a19e5cfd24a2a864b81",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xefa0FDf4Ca8FD79227fb9A19E5CFd24a2A864B81",
        "scheme": "exact"
      },
      {
        "amount": "2000",
        "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
        "extra": {
          "name": "Global Dollar",
          "version": "1"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:4663",
        "payTo": "0xefa0FDf4Ca8FD79227fb9A19E5CFd24a2A864B81",
        "scheme": "exact"
      }
    ],
    "description": "Gemma 4 26B — Google's open model. The cheapest way to get a good answer.",
    "extensions": {
      "bazaar": {
        "category": "llm",
        "info": {
          "input": {
            "body": {
              "max_tokens": 1024,
              "prompt": "Explain x402 in two sentences."
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "receipt": {
                "amountUsd": 0.002,
                "asset": "USDC",
                "ms": 1200,
                "network": "eip155:8453",
                "payer": "0x…",
                "tx": "0x…"
              },
              "resource": "gemma-4",
              "result": "{ text, model, usage }"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "max_tokens": {
                      "description": "Output cap. 2048 at most, 1024 by default.",
                      "exclusiveMinimum": 0,
                      "maximum": 2048,
                      "type": "number"
                    },
                    "prompt": {
                      "description": "What you want, in plain words.",
                      "maxLength": 24000,
                      "minLength": 1,
                      "type": "string"
                    },
                    "system": {
                      "description": "Optional instructions that shape every answer.",
                      "maxLength": 8000,
                      "minLength": 1,
                      "type": "string"
                    }
                  },
                  "required": [
                    "prompt"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "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/v1793166422/bazaar-icons/5ef39b93b2d49e3c.png",
    "lastUpdated": "2026-10-28T06:07:39.373Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-28T06:07:36.402Z"
    },
    "resource": "https://wafermap.xyz/v1/gemma-4",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Gemma 4 26B — Google's open model. The cheapest way to get a good answer."
}

What the leaf hashes

{"body":"ca2367cff2c59214a1e8e2e0e2bc4df60d335aa937e0f1534cdfb9d933313d7e","id":752005,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793178800335931,"prev":null,"subject":"x402_bazaar:https://wafermap.xyz/v1/gemma-4","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0xa25b63bf6702d01af5d3f3283400990aa8c5b1b0d6d5b5c7bd6f6a3c8bf9b8c1
2. 0x5f8080751803c6af9e69ab0aaca788498bfc784d7ce7befb6207b7b7d48cf4b6
3. 0xdba947a48eba89108ecb03231b1eb8b56330d5f8e90aa67b970d6c3620b42b6b
4. 0x7abfc0e4efd71178062774b69c2f5181b7e7bcc0fa94cff334f16872c9628a64
5. 0x70deb6be4c28806fe92f259dabc07f5a07a237bf80765ef0a259f2e0ed3461e5
6. 0x3b45732d29102f701ab2a945af54713e93e8ed19a50a6ada7f7b61dab06d6c44
7. 0x4f555b373abfe8e481a84577a0b05fdca845a3b53dee8ad7a60b153ceeb71f1e
8. 0xc0ecf459c0f75823cd643fcb1d1c8868757cbaf424d86213334a53cede4bb420
9. 0x6a7fe126ed1ad7594db1bab42f9c96b304c0069d35664cae2d37a9d10034cbc9
10. 0x1fdf3926d250f25ec83599ec7a0d282d18c581c8e3036e6e4cb2b9dfb252caec
11. 0x824ff28e312522c3d54662df3873b742fa9bc26950049e38193bad1d23cb5188
12. 0x842d7b1987612c487a9896ed293fbf4e4e5257a7108fa185ae50a30dccfb4801
13. 0xa938e25481f6c2bb7474d5ed23c3e6616105250a53a3f98587d0ebff02240902
14. 0xc4674b97eec0bfb92cf9c2ffb4427d455d9f902b5fe3ea0be83ee462202d7416
15. 0xcf313ac43fef601c9e46f82a687b6a3c655f47c31675c1791c49de20295be63d
16. 0x0f8977bd16865247451d1ee836b084081d3d0cd17d6a07353fad0c70393c7403
17. 0xe08e8bd91858a8a10c46ecde9c29a6288b960987303173c5e882afb46ce91fa0
18. 0xe6cfe00ae4e02bc12327e45b5f3334ea5850ba3bcc8e3101d30a8189856a95af

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae