Evidence row 751993

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402.presenceoperations.com/services/execution-cost"
    ]
  ],
  "name": "x402.presenceoperations.com/services/execution-cost",
  "owner_address": "0x51edd63f074eab0b1ab94c7bcf8b1e3ad43f1d2f",
  "raw": {
    "accepts": [
      {
        "amount": "4800",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x51edd63F074EaB0b1AB94c7BCf8b1e3aD43F1D2f",
        "scheme": "exact"
      }
    ],
    "description": "What it would cost to execute a given notional in a given market right now: size-weighted fill price, slippage from the touch in basis points, and whether the visible book can absorb the size at all.",
    "extensions": {
      "bazaar": {
        "category": "transaction-simulation",
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "market": "BTC-PERP",
              "notional": 1000,
              "side": "BUY"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "absorbable": true,
              "averageFillPrice": null,
              "bookObservedAt": "",
              "detail": "",
              "filledNotional": 0,
              "levelsConsidered": 0,
              "market": "",
              "requestedNotional": 0,
              "side": "",
              "slippageBasisPoints": null,
              "touchPrice": null
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "market": {
                      "description": "the perpetual market to price, upper-cased before matching, for example BTC-PERP",
                      "pattern": "^[A-Z0-9]{1,16}-PERP$",
                      "type": "string"
                    },
                    "notional": {
                      "description": "the size to price, in quote currency, bounded so one paid call cannot become an unbounded read of the venue",
                      "maximum": 100000000,
                      "minimum": 1,
                      "type": "number"
                    },
                    "side": {
                      "default": "BUY",
                      "description": "which side of the book to walk; omitted means BUY, and anything outside BUY or SELL is refused rather than answered as the default, so a misspelled side is never charged for",
                      "enum": [
                        "BUY",
                        "SELL"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "market",
                    "notional"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "type": "object"
            }
          },
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-28T03:31:20.105Z",
    "quality": {
      "l30DaysTotalCalls": 10,
      "l30DaysUniquePayers": 7,
      "lastCalledAt": "2026-10-28T03:31:19.57Z"
    },
    "resource": "https://x402.presenceoperations.com/services/execution-cost",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "What it would cost to execute a given notional in a given market right now: size-weighted fill price, slippage from the touch in basis points, and whether the visible book can absorb the size at all."
}

What the leaf hashes

{"body":"5729a9e10a51438028548af3395220bc84d04966f91cc38513af74c4d424c31c","id":751993,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793178800285221,"prev":126750,"subject":"x402_bazaar:https://x402.presenceoperations.com/services/execution-cost","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0xc85a72644159f5dc6560217225472df19e0f30d9ec2a1ba4d1801d063abfb9be
2. 0xa3e33a3987f226207d878a702b10ebda93bff9fe6d514590b080ea7acde7c8c8
3. 0xdebf9d8a4dfa5b059f2d619564aaef05c7a44eefaa121aa50c7aeeb824507347
4. 0x30e7b6ba3a3cc719496778bb45a3d2588f900843146fea59837822e792359a97
5. 0xc222b401b3eca137e8bb60dd92b2b16b0b032decfac51d59632ee443a9ba59bb
6. 0x1fe00a2c5c0bbf46a6c9f447656672b61bea42ac73ebaf28d0e0977e78726b0d
7. 0x8cf934f115308d0722694fb41eca0e0473f4c2d38f85e7ea3882af85f43b8787
8. 0x993de4204ff6bc3b40c16ce8df3b333fa1b124db2eb09c91fbfd39d4967eed74
9. 0x7255555490f0d38c279fa2668f461e397a5fc32d3c4c409f1ecad8016b4ad77f
10. 0xb87dc341811996b5fdc637bc965a1c44d52800be252462ae26bf02fa689dbff9
11. 0xc226b31512a7b8df6fa03fe0c3eac0fa8a50aa90e10ef08e66314993281dd213
12. 0x4a243266328b748b77feea27d81730e25ab3bb67e7d665543bbf624e2632d6d3
13. 0x1f99df47306e7104ac9c626f7183c80611a0f90b978c68f0770fd8379ecbaeb9
14. 0x8e49280a62bd5d52127f332ab6aea9d7c57381f541e0178094a62272a9d2e741
15. 0x6d86d2282dd724b1b80d031e4e3cf9ed095b746e38c9e58d933efb597daff87f
16. 0x32beeeb960280bc48748681cb10297ede9403461fe9c8143fdf946548e552926
17. 0xe08e8bd91858a8a10c46ecde9c29a6288b960987303173c5e882afb46ce91fa0
18. 0xe6cfe00ae4e02bc12327e45b5f3334ea5850ba3bcc8e3101d30a8189856a95af

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae