Evidence row 526940

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": 5,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-27T10:07:28.226Z"
    },
    "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":"55de6bd42b90af44f890f01bb61cafceda9a81b09e545d1d7cb292e2fb78ee5c","id":526940,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124793166013,"prev":452666,"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. 0xe9324b9c47f2ddafbd2ad259bb0e938ab3a3af9e648dea39709f5bca4579f932
2. 0x5170347f5c9b72afe8eff45bb990554c800367f0a6d6511a4f2b517af55c0248
3. 0xc4537571adcd4cb9e1a8d24fecc1937035faca185b6f72dfb5069695effe4256
4. 0xe7d1ee99f3010a0921a0a26c0b6632c2006964a9eb9c070511581d28d71c3ef9
5. 0xbb3d3a823344d7eac62a32010a32597d538560d7b79f1caaee9dd2f0d201921f
6. 0xda871aeb98aa49044c0a71a8d158fbc502d41f62895a4640f1d9448dcb722234
7. 0xb22d12f87583915c46cba0007dec9a4e02cbac93f68de6e32f147977a1dc58a7
8. 0xe136e88a9cc113fdb6dc7628b4726b65afb9159e07366530351c5434f83e20f2
9. 0x6fbc91d4728f9c56e1c8be949b608d5aac43e89fae584ec0d979c23178db5082
10. 0x2c8d0460a0b46eeed71f98874e5e7ae9376b1188e21b9ddd589f50f3dc369234
11. 0x6a1ca1d26d7fbc3e226dc64da92fdc4ab49e077ac1ba6b010fb0df91826f652f
12. 0x555cdc5682ffc7c8210a3ce0f57c03bc80456dce0d2723d1de26e7d1e57b0f94
13. 0xab6eb305329046d5ccb835dd8ca955f794e3ca110379a94dbdc780d016448561
14. 0x41f9f462759cb539183e979fb3eb967d94755cf039c44a64a9a3c4ad97523cfd
15. 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4