Evidence row 123745

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/xyz-NVDA"
    ]
  ],
  "name": "vaunt-dispatch-production.up.railway.app/agent/x402/cost/xyz-NVDA",
  "owner_address": "0xf4b1093a9498523e18c484989df5157012abb85f",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xf4b1093a9498523e18c484989df5157012abb85f",
        "scheme": "exact"
      }
    ],
    "description": "True cost of trading xyz:NVDA on Hyperliquid, measured on Vaunt's own IOC taker orders: slippage vs mid (p50/p90 bps), taker fee paid, wall-clock to fill, fill rate, against the venue-class median, plus spread, round-trip cost, depth within 1% and funding APR. Real fills, not quotes.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "asset": "xyz:NVDA",
              "dataset": "vaunt.cost",
              "liquidity": {
                "as_of": "2026-09-09",
                "depth_within_1pct_usd": 4164926,
                "funding_apr_pct": 8.7,
                "perp_spread_pct": 0.01,
                "round_trip_cost_pct": 0.11
              },
              "our_fills": {
                "days": 21,
                "fill_rate_pct": 100,
                "fills": 38,
                "last_fill": "2026-09-09",
                "latency_ms_p50": 1380,
                "since": "2026-07-16",
                "slippage_bps_p50": 1.2,
                "slippage_bps_p90": 5.9,
                "taker_fee_bps_mean": 4.5
              },
              "venue_class": {
                "class": "hyperliquid:perp",
                "latency_ms_p50": 1400,
                "slippage_bps_p50": 1.7,
                "slippage_bps_p90": 7.9,
                "taker_fee_bps_mean": 4.5
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "builder-code": {
        "info": {
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "a": {
              "description": "App builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "s": {
              "description": "Service builder codes",
              "items": {
                "pattern": "^[a-z0-9_]{1,32}$",
                "type": "string"
              },
              "maxItems": 11,
              "type": "array"
            },
            "w": {
              "description": "Wallet builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            }
          },
          "type": "object"
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "lastUpdated": "2026-10-25T15:18:01.623Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-25T15:18:01.393Z"
    },
    "resource": "https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/xyz-NVDA",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "True cost of trading xyz:NVDA on Hyperliquid, measured on Vaunt's own IOC taker orders: slippage vs mid (p50/p90 bps), taker fee paid, wall-clock to fill, fill rate, against the venue-class median, plus spread, round-trip cost, depth within 1% and funding APR. Real fills, not quotes."
}

What the leaf hashes

{"body":"afb114bc505902e1a84c3befb7bb026ecf6d259f0eecc054fa6e133e0d396fa4","id":123745,"kind":"listing","method":"baseline/1","observed_us":1793025623674791,"prev":null,"subject":"x402_bazaar:https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/xyz-NVDA","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x45c031f65f58a902949a592fa2e37332816ba4acf8fd0f258da35e3b6f279bf7
2. 0x5789710bf0e19ec795bc96b6364640beaba7a498041e9f372e9d734e2f33f21a
3. 0xa4c5e3a6e4c20fe786e4f30b5beab68de58eacfcf05d57272b7c5e1bea46515c
4. 0x5e216fcd47c5030938668be260c56f3b9e736981765e7dd89fb0ba65e2ef7571
5. 0x346dee0f3ea43fafe690f2b84d9d809c45c5faf728107b77452650c4114b0f34
6. 0x82bb5ace289f968b5b2e469b93e2112167970989711e2f581377ed82221ca476
7. 0x672e1b9234ad60050db76a9fc7c8a581a2b092ad7499cf1adb2f32f87559bef5
8. 0x69eb8b8ef9844bff93705a5edf763e8d06cf53df3554a4ac6fe20a3bacce0812
9. 0x7383eacf65a565ab369246d681e8a7ad7900a05678a119c5d1d038481f5ed0a8
10. 0x6a1f5a35af750ae279aa449f09e871daec7daf61e24910bcb67b1594232df31c
11. 0x415bf66d9c632a887484603836ad3f90715af6f56ae73f0a5711497372ba0265
12. 0x804dd9d5afe0f1a780e24099fb6b21f5f20545893ea0eeddf5fb9114e2f3edd5
13. 0x54b29089c0a3cbbd6ddbe58944696110984dd5f418275cb1b77f957c56da8eab
14. 0x8b27a4c21bf4ba962fd008c8f4300bc6953764a5032b9ab0cfe696b318c45326
15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae