Evidence row 1039032

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": "2026-10-28T22:54:57.859Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 6,
      "lastCalledAt": "2026-10-28T22:54:57.615Z"
    },
    "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":"e9611d4fa2a2e465d6cc9b9b2b700e824bcda2e694fd7a75103ecbb08f52dec3","id":1039032,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298277785835,"prev":526940,"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 2026-10-29 (242798 rows).

1. 0x60d6e931c0fb4a820a0ce28f00f852150d39c8dc97c48fe248605c19e764dbf9
2. 0x66d8497f3c0f4908929a1cf2ee3f76d1d7c9d88a421a1dad0280551068af848b
3. 0x861ecefe4cd6b2a64a8f3dc2747c94e1d24db03a88429dd036e96c3a3d6357e4
4. 0x6b999642182dc66992761a6165f4656f9eb17fdbcc4a5eca8a5488265867ca9c
5. 0x55adffe36cb9ee8da286569f4d210a4c19dc24fd1b3826259efbc97707b1ae42
6. 0x638b5a19c313354bd84449e5f83cdf754c0df8135f0651e1bbe224da39dd47fa
7. 0xd3099bf404ecf4c981702b2e81b77339c48586ef4c08a4d6b5b3b9cfcc87cf7e
8. 0x30c0303a98c293e20910986f64b09dc6358c0c9bff6aa97b0449af1a3f12f864
9. 0x09790ce5ff6afb66b32ba29101f48ddad710ef55bc0f9c4962dfbf17ae3c0afb
10. 0xbe2d2d4bf881a5ca7377187423f84a325a77fc87abfed813d31684ba1e260ecc
11. 0x7232991283cbad01b3b0a9de5475ddd3f2cd52853397a5ca1144d172346a8eb3
12. 0xf1660b18a8e8edb8734c77f32a7089ce48701a59d7e8c33412c0ae2fa901d40c
13. 0xc90367b07a500caa9d82d581b4945e6249bed8be8c5175223f7b366bf9ff9d37
14. 0xa523bd4cbb3e762fe27dc53a6d42747aef6e5dea4f602786fa6968d56a8842bf
15. 0x5c72917224317e5d0d7a0d4ada19337530fcd8b513d6fc46866876f7844efe17
16. 0x976395aaca1b771b7e37710dee4157412909d2398c44e306a2e1e3fe83b984fd
17. 0x91f12a2db1e2c1be07cbe4de3981a37a33051a36d3c3eee5a260804add6d1d75
18. 0xd56e61af23709ed9f460471e3c08400c0142ee83e1fd9057e46350d12edf9c07

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1