Evidence row 425301

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.firstmention.uk/s/txpreflight/verify"
    ]
  ],
  "name": "txpreflight",
  "owner_address": "0xe029fcf4ba573f6fdc282208fe855df8cbb3ca9a",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xe029Fcf4ba573F6fdc282208fe855dF8CBb3Ca9A",
        "scheme": "exact"
      }
    ],
    "description": "Base agent toolbox. /preflight simulates a tx (revert reason, gas, EIP-1559 fees in ETH and USD) before you sign. /verify reads a receipt and proves a USDC transfer settled: confirmations, amount, sender, recipient.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount_usd": 5,
              "pay_to": "0xe029fcf4ba573f6fdc282208fe855df8cbb3ca9a",
              "tx": "0x54002146b9c089ad89c91d1750b45d0c35e133caa5b0a536df8f57e9c2a4a74b"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "block": 53042026,
              "chain": "base",
              "check": {
                "amountMet": true,
                "asset": "USDC",
                "recipientMet": true
              },
              "confirmations": 27804,
              "ok": true,
              "status": "success",
              "verdict": "settled"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "headers": {
                  "additionalProperties": {
                    "type": "string"
                  },
                  "type": "object"
                },
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "amount_usd": {
                      "description": "/verify: minimum USD that must have transferred",
                      "type": "number"
                    },
                    "asset": {
                      "description": "/verify: ERC-20 to check (default USDC on Base)",
                      "type": "string"
                    },
                    "pay_from": {
                      "description": "/verify: require this sender",
                      "type": "string"
                    },
                    "pay_to": {
                      "description": "/verify: require this recipient",
                      "type": "string"
                    },
                    "tx": {
                      "description": "Transaction hash, 0x + 64 hex",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "block": {
                      "type": "number"
                    },
                    "chain": {
                      "type": "string"
                    },
                    "check": {
                      "properties": {
                        "amountMet": {
                          "type": "boolean"
                        },
                        "asset": {
                          "type": "string"
                        },
                        "recipientMet": {
                          "type": "boolean"
                        }
                      },
                      "type": "object"
                    },
                    "confirmations": {
                      "type": "number"
                    },
                    "ok": {
                      "type": "boolean"
                    },
                    "status": {
                      "type": "string"
                    },
                    "verdict": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T04:17:47.254Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-27T04:17:46.768Z"
    },
    "resource": "https://api.firstmention.uk/s/txpreflight/verify",
    "serviceName": "txpreflight",
    "tags": [
      "base",
      "usdc",
      "settlement",
      "x402",
      "gas"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Base agent toolbox. /preflight simulates a tx (revert reason, gas, EIP-1559 fees in ETH and USD) before you sign. /verify reads a receipt and proves a USDC transfer settled: confirmations, amount, sender, recipient."
}

What the leaf hashes

{"body":"9e1839cddf031bf0d7e8f2d428623a0cf2711de4fd059d4d90bdbe2374bc4e5c","id":425301,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793086109309355,"prev":407493,"subject":"x402_bazaar:https://api.firstmention.uk/s/txpreflight/verify","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. 0x789d8ca42817594189981767223fbde5121745572d2526b637b3370b00a258d0
2. 0x04a14de2af4bb3d921b6454965a80ccc09dfa3f5d89d4d03c803b6523aadafa4
3. 0x263356780cfeec70585fa22f1e7e884274ea3292c75f610184490aa770a09caf
4. 0x00abf31d128a3668e7a5cae8146e7d8b25a181b9ee239f9f924e17c6f0665a5d
5. 0xaa6a1184deecec44714e948cda08294db723098f4a55d43968e0ffbda0042e26
6. 0x0e926632b52b1fc072b22d1f9358f94544d5a7e0e7429fb77d9df421e2a85474
7. 0x6cbff641f3b8cd8443036468d3d3de84516373afe3af761f9160094f807adb44
8. 0x4b26eeef3fc589da6bf9ae41115a92b3d5af44217610f83cc9c9d42e1822b0f2
9. 0x186892b9e45df4ac43e9600c0cabc28d3ca8f86e168330f03388db77b836bb0c
10. 0xc93ff62c98f70c7f45a1e129c112326b4251aee97fcb847be8902e7ce832840d
11. 0xa1e6e989ecb6e1c43313ac525ace9dc4656b12fbac67512d19580139784350ab
12. 0x30b0c1fa0ae50435d58b5b7f993dde40a8bcc3f5956d7e3d31946f1a957684b4
13. 0x8f2d125f5fe55a24b5da16577766eeaa13f24a272bb4c1c016f423ae917da681
14. 0x9848c068b1371232529d2b5738fdc45b854c57da041b69ea7c9e112b14e2d9d1
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4