Evidence row 1039771

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://machinemint-native-x402-production.up.railway.app/v1/base-preflight"
    ]
  ],
  "name": "machinemint-native-x402-production.up.railway.app/v1/base-preflight",
  "owner_address": "0xe43e47dd6b779fe9e591586a3e1cba00c2f36c80",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xe43e47Dd6b779fE9e591586A3e1cBA00C2f36C80",
        "scheme": "exact"
      }
    ],
    "description": "Check an unsigned Base mainnet transaction before signing or broadcasting. Simulates with eth_call, estimates gas, checks sender balance and target bytecode, decodes supported token transfers and approvals, flags unlimited approvals and suspicious transaction shapes, and returns PASS, REVIEW, or FAIL. Never signs or broadcasts.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "data": "0x",
              "from": "0x4200000000000000000000000000000000000006",
              "to": "0x1111111111111111111111111111111111111111",
              "value": "0"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "canonical_endpoint": "/v1/base-preflight",
              "chain": {
                "chain_id": 8453,
                "name": "base"
              },
              "gas": {
                "estimated": true
              },
              "reason_codes": [],
              "request_mode": "marketplace_verification_sample",
              "risks": [],
              "sender": {
                "sufficient": true
              },
              "service": "machinemint.evm.preflight",
              "simulation": {
                "ok": true
              },
              "verdict": "PASS"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "description": "Optional GET query parameters. Omit all fields to request the deterministic marketplace-verification sample.",
                  "properties": {
                    "chain": {
                      "default": "base",
                      "enum": [
                        "base",
                        "base-mainnet"
                      ],
                      "type": "string"
                    },
                    "data": {
                      "default": "0x",
                      "description": "0x-prefixed calldata.",
                      "pattern": "^0x(?:[0-9a-fA-F]{2})*$",
                      "type": "string"
                    },
                    "from": {
                      "description": "Sender wallet for the unsigned transaction.",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "to": {
                      "description": "Target contract or account.",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "value": {
                      "default": "0",
                      "description": "Native value in wei.",
                      "type": [
                        "string",
                        "integer"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "action": {
                      "type": "object"
                    },
                    "canonical_endpoint": {
                      "type": "string"
                    },
                    "chain": {
                      "type": "object"
                    },
                    "gas": {
                      "type": "object"
                    },
                    "provenance": {
                      "type": "object"
                    },
                    "reason_codes": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "request_mode": {
                      "enum": [
                        "provided_transaction",
                        "marketplace_verification_sample"
                      ],
                      "type": "string"
                    },
                    "risks": {
                      "items": {
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "sender": {
                      "type": "object"
                    },
                    "service": {
                      "const": "machinemint.evm.preflight"
                    },
                    "simulation": {
                      "type": "object"
                    },
                    "target": {
                      "type": "object"
                    },
                    "transaction": {
                      "type": "object"
                    },
                    "verdict": {
                      "enum": [
                        "PASS",
                        "REVIEW",
                        "FAIL"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "service",
                    "verdict"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-23T23:32:59.42Z",
    "quality": {
      "l30DaysTotalCalls": 7,
      "l30DaysUniquePayers": 6,
      "lastCalledAt": "2026-10-23T23:32:59.211Z"
    },
    "resource": "https://machinemint-native-x402-production.up.railway.app/v1/base-preflight",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check an unsigned Base mainnet transaction before signing or broadcasting. Simulates with eth_call, estimates gas, checks sender balance and target bytecode, decodes supported token transfers and approvals, flags unlimited approvals and suspicious transaction shapes, and returns PASS, REVIEW, or FAIL. Never signs or broadcasts."
}

What the leaf hashes

{"body":"b08946fdf7bbbb3005bc12144ca233c3a9606230d605ab4e395ae4d8b4d7b5be","id":1039771,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298461084039,"prev":77269,"subject":"x402_bazaar:https://machinemint-native-x402-production.up.railway.app/v1/base-preflight","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-29 (242798 rows).

1. 0xb139b07f2ec198b7dd330f31651fdf03b80aba63cc6f456b9b886f043f2706eb
2. 0x5a0db3bad062f7889f745e0b5aa766ef015e540dc2c1cc8440c1e6928137deef
3. 0xbe2c84d45cf4457d2e8b1129ff53dba1ff101b4df4919721c8a57479afd3b28b
4. 0xa194522f53299b1f66c7e2dd0b8af4781c5e3f2c1919172b4d42248251a56456
5. 0x0a6928c6cf6fdb7baba2389d45ac775545cb8935230e3007132802f5e491f824
6. 0xee4e99aacc01d8de06c3275e5152ba4c6663635266eb66cac1752c841f1f2074
7. 0x24cba7a94e0f514d82d966a300dad0d2d8c55dac980ef6cfa5ce102a5b256a6a
8. 0xb2faf47b1a6ade86e9a5570225e6e1f2c23e795def0d2da6cbc139d69aba67b8
9. 0xf516160b3149a91a32af015507f0deef012950195ab843c3401104c07eaf4274
10. 0xd6ae52551de758667f208d611a499ab382fbcc38cfdab594b826a91770bb278f
11. 0x4c5674bb6fc1ee577af7321ce68f55f5e1ca7a24df11fb77db8713c0e5ef12ef
12. 0xfc65c74dda5d799e81996842c804510f5f959a0128a6babbc26afed4b057c5d4
13. 0x30dba3897a2e6907174b0058b94302f9cd01c20ba1fffe70ca722237279171ed
14. 0x585b1e0c9b8e6cc02683a3bcbd6f86329575401feac9ee51a7efd21ed87f7ed0
15. 0xaa1d19094c2ce6d011a3c40533fa7efee207719d6c482ffc47018b28e5518acc
16. 0xef5d5572aac8f06b61579b7167b369fcb479d9027d4037dc9cacff9e3a26ffd2
17. 0xa1fa2e97e71ad6e802f325afd74bb7095901f2060529c9739182a1233f8804bc
18. 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1