Evidence row 452666

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://fx-reference-rates.mick8511.workers.dev/rate"
    ]
  ],
  "name": "fx-reference-rates.mick8511.workers.dev/rate",
  "owner_address": "0x6f762720b8515b7091e6aa69e8361f7b9909233f",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x6f762720b8515b7091e6aa69e8361f7b9909233f",
        "scheme": "exact"
      }
    ],
    "description": "Currency exchange rates from the European Central Bank's official euro reference rates: convert an amount from one ISO 4217 currency to up to 30 others, today or on any date in the last 90 days. Cross rates computed via EUR.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount": "100",
              "from": "USD",
              "to": "GBP,JPY"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "amount": 100,
              "converted": {
                "GBP": 79.324238,
                "JPY": 14982.144492
              },
              "date": "2026-10-14",
              "disclaimer": "These reference rates are for information purposes only and are published free of charge by the ECB at https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html. Cross rates are calculated from ECB euro rates and are not official ECB rates.",
              "from": "USD",
              "note": "Latest available ECB reference rates (2026-10-14). ECB reference rates are published around 16:00 CET on TARGET working days. Cross rates are calculated via EUR.",
              "rates": {
                "GBP": 0.79324238,
                "JPY": 149.82144
              },
              "source": "European Central Bank euro foreign exchange reference rates",
              "source_url": "https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml",
              "to": [
                "GBP",
                "JPY"
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "amount": {
                      "description": "Optional amount to convert (default 1)",
                      "type": "string"
                    },
                    "date": {
                      "description": "Optional YYYY-MM-DD within the last 90 days; non-publication days use the most recent prior ECB date",
                      "type": "string"
                    },
                    "from": {
                      "description": "Source currency, ISO 4217 code, e.g. USD",
                      "type": "string"
                    },
                    "to": {
                      "description": "Target currency or comma-separated list (max 30), e.g. GBP,JPY",
                      "type": "string"
                    }
                  },
                  "required": [
                    "from",
                    "to"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T10:07:28.384Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-24T09:44:22.576Z"
    },
    "resource": "https://fx-reference-rates.mick8511.workers.dev/rate",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Currency exchange rates from the European Central Bank's official euro reference rates: convert an amount from one ISO 4217 currency to up to 30 others, today or on any date in the last 90 days. Cross rates computed via EUR."
}

What the leaf hashes

{"body":"6da2084e9524bfc0da0fac268efefcd9c047930541710ecfaf64082a3ab939fd","id":452666,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100554267374,"prev":75667,"subject":"x402_bazaar:https://fx-reference-rates.mick8511.workers.dev/rate","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. 0x995a1fa627763a46efd9b77c3006d05c64d69ddf06b7e7f7f3e0534ba1f574ed
2. 0xc4c71c9048f387580c690ff06d218e08989e0274af33aa405dcfb6842c174e6b
3. 0x5b0d350ce27fbaa956573529a5ac5f094a0dc71551e595c94b110f664fa5c7f5
4. 0x9982a208b25a025972d9c0fc1d916ea3ce77cee90b3da78b370cb87b3d522ba2
5. 0x6d6a3ed11d9dd721c7cc705f0585e636bbedcbf74b2478daa861f8055a8e98be
6. 0x60dd6955e87cf561672a4f0bc4abfc57f6e60c9e0d35df19ec4d8f2fcda5abf8
7. 0x50fbd46777734653a690bc4725833301af53a13f675d64e735116cc377c18e3b
8. 0x9ae9170d5a6a5b416c1628780c1ef6dd6d05962bcdcf8d93bb6095dda39fb28f
9. 0x958c41e2efbce04af91bcb1333624cb9c0ec93bf1454475a392ebe31fbd73cb9
10. 0xfafd7acbbf81c514ccd69cca332a22472485a9a7b44a7be505ade4139587597a
11. 0xa41abe253efa912fb9578616717d0a43d778c1509c3109fa4cfcc00433d8500d
12. 0xff66a3c0db6d61623a5ee399a8625355b32e95a4eb77e6d9f9ca4ae4dcbc5937
13. 0xfe6d2e9a468b7e99de9162a2ef30ac0b0e3b318387b4356bf524493aa67b295b
14. 0xa3c9c760ee424c178bab782711c2b9d3e15a80a6fde99165972cb75b306bb8b4
15. 0xb4f7223140c8a36cb87a63d77cf617086d9968dc4658f03e102571ebe06e9ed6
16. 0xfecf3d4646dd4984a13dd715499e842c3fde63692336d97394c2bfd8e877ca5d
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4