Evidence row 407815

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.nexismvp.com/market/gas-audit"
    ]
  ],
  "name": "Kronos Gas Audit",
  "owner_address": "0x3b59f268ebc38c5f43b8b9be37238bf43378ad87",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x3B59f268EbC38c5F43B8B9bE37238bf43378Ad87",
        "scheme": "exact"
      }
    ],
    "description": "Audit real gas spend across up to 20 Base mainnet transaction hashes you provide — total/average gas used, cost in ETH, per-tx breakdown. POST body required. Experimental/informational only — not financial advice.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "chain": "base",
              "tx_hashes": [
                "0x67ccc8ae0a27d2f4dbca4ebbf047e05521350dff34e2f99c36ac878f22941282"
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "average_gas_used": 21000,
              "total_gas_cost_eth": 1e-7,
              "total_gas_used": 21000,
              "transactions": [
                {
                  "gas_price_gwei": 0.005,
                  "gas_used": 21000,
                  "status": "success",
                  "tx_hash": "0x..."
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "chain": {
                      "description": "Only 'base' supported currently",
                      "enum": [
                        "base"
                      ],
                      "type": "string"
                    },
                    "tx_hashes": {
                      "description": "Up to 20 transaction hashes to audit",
                      "items": {
                        "type": "string"
                      },
                      "maxItems": 20,
                      "type": "array"
                    }
                  },
                  "required": [
                    "tx_hashes"
                  ],
                  "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": {
                  "properties": {
                    "average_gas_used": {
                      "type": "number"
                    },
                    "total_gas_cost_eth": {
                      "type": "number"
                    },
                    "total_gas_used": {
                      "type": "integer"
                    },
                    "transactions": {
                      "type": "array"
                    }
                  },
                  "required": [
                    "total_gas_used",
                    "transactions"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-26T19:16:09.86Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-26T19:16:09.563Z"
    },
    "resource": "https://api.nexismvp.com/market/gas-audit",
    "serviceName": "Kronos Gas Audit",
    "tags": [
      "crypto",
      "gas",
      "audit",
      "base"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Audit real gas spend across up to 20 Base mainnet transaction hashes you provide — total/average gas used, cost in ETH, per-tx breakdown. POST body required. Experimental/informational only — not financial advice."
}

What the leaf hashes

{"body":"ca66f322a8d2854e4d60f717de38ed41edf73df256662861bca305c834003cb3","id":407815,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080252525747,"prev":283991,"subject":"x402_bazaar:https://api.nexismvp.com/market/gas-audit","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x482a64d07d6169b89f7c2faeb81a030aac889753f439d08f7cfd6f9459fc9f97
2. 0x493eb303b9da0eaa5e9003fc381d7686a36bed1335969040202bd68be3aa27ad
3. 0xc3d261ca29dcf805cdde7ae01196bbda8014921099b13c190fad0d4f0e80be84
4. 0x4e74ccd8f67331208457ebc95f3f1c71a41554a3bbafbeea7000136dac8f5a48
5. 0x88a618b884cb51913dce897d5c100a892f2ec5a3c4f6911257a165d4ecc5208a
6. 0x32ee649980e917a4b7aa191e88e3c4443d3faa3031ba9fe8e9a3a75420632d44
7. 0x2cddaa4752acdc3650136a541d1ede8a52791567bade8e57be3fb1d491d4805b
8. 0xdac38cf9c1ca601809ddb1bf23a8e71fe8300e0f81901ac13dbfe03bb0bee23d
9. 0x82842812f8c15586b5f6baa8d79b18771657ad15ed5ad6c9cd1af1c0a454faca
10. 0xbcfbbb3d397d362db0caa75be63889de19dd450f1ed28f3c276618257191d9d2
11. 0x54a45a3e1f1134ba6b79df5cf2d8890a00d02b63d33f9f5954091bef7c28e130
12. 0x84a7deb20d980d7ddf0eb089162b3d962c18f6c0ca46af19476c3066a5b827f3
13. 0x836e1796750a28d286ffaa8d273d250fe348c563336bf2d30cfaf1001d95f677
14. 0x80ede9e5d428e39db26928b1d08254ff1241f1d7e091fd2e57130fbb4423162b
15. 0x2c117b27721eea45f6590fbccb471d21a7b0b079a53f089ecb300c63bdb3aebf
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4