Evidence row 77269

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": 8,
      "l30DaysUniquePayers": 7,
      "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":"b6dbe072d5a95530f63aa9b1b3167363f5b060b08b7a768afd64f113aa64a541","id":77269,"kind":"listing","method":"baseline/1","observed_us":1793025493729149,"prev":null,"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 2026-10-26 (296695 rows).

1. 0x30dff480bec9c52ae22d1336fab4f0cd203e8ecc2cb3d56400e464af757a1d8f
2. 0x054c6d82e380cb77cc7e68dfe893267a602a14b108dfc9cd1a1e025e846e8181
3. 0xb380a0e62cb0d270163263aa2c3c6538874ef52f290ab3a99e2fadc1532220e8
4. 0x126c73c8f42e15286ad16d58c270c97b405e48ffd815d4f92a581393d82395d2
5. 0x3a959fca2a3b26d8c4a3be8f92e4d875ba1b53f1176cfe9084f93840ae5e7b81
6. 0x645918c69914c6fc4856f3f98c22ed9da6b6ca97a2cf9d3c8692bfd185de57ec
7. 0xb85026339c1b0cc8b0c91c05bdeba6933b0334f3a9c2e25dda54aef586a7d703
8. 0xbe1f6967b7ccb10ab8aaaa4b0078a12871ef0098e8a42f5d97a076d3889f8e83
9. 0x41adad128d0ed6c60b71cfa779d003d6b8c9aa7d92fd944c183a1986ddb6ba1f
10. 0x14dcc9b621776bab010784ab2ff8bc9cde2e6118dc9a5e1e68af1ab2b33794cd
11. 0xa4cc17a7ce78f05039820f0a50d323cd0bedd23c37338f2719d249dca75c07ec
12. 0xd85c7204d76d26255c94ef4caa12c05addd08238caa5cdc3888ea60b74e6b940
13. 0x36a44931b230976c04691d90bf3a25ed4111d74c78b672850d8025a911ca88dd
14. 0x683955a5b2250ad50568d022a6580d8739b6aff1356779d72a773b088e7c289c
15. 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae