Evidence row 123736

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/BTC"
    ]
  ],
  "name": "vaunt-dispatch-production.up.railway.app/agent/x402/cost/BTC",
  "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 BTC 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": "BTC",
              "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": "2026-10-06T16:42:51.443Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-06T16:42:51.22Z"
    },
    "resource": "https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/BTC",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "True cost of trading BTC 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":"98beafea55ff04059c119ccd294d9c9932118443c9dc4e8ea28e7d9e8a67917a","id":123736,"kind":"listing","method":"baseline/1","observed_us":1793025623664681,"prev":null,"subject":"x402_bazaar:https://vaunt-dispatch-production.up.railway.app/agent/x402/cost/BTC","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. 0x7f0efce5d1a4ac29f9db2666dc23d200067fead429e5639a7fddc45431684eab
2. 0x33230e179dbf4273fcd1ea563930d3f6458c87796f2f606d4035008cecb4a5f5
3. 0x07e99f34cb618a75b46f5ce39c7ae8eb5d6f79fb3fe9aa8dffe4f4b4761c4114
4. 0x37d6f0f039213161a5543525e96d47b269304d4d082fe05b2284aee979bbcb72
5. 0xb1ff30f4b61cc1e4802ade9eff35e1ebf0f9803f94becd4267976c0f7081dece
6. 0x102f620a12cde041a1aa33d80f61d788b46e308ef98720e306142470dff0d953
7. 0x4d23b38470b7f4ee319278cd8a481e53f22edf346933ef58c23a49a6a25e6de0
8. 0x80a6d8cab467acd749d1fe25af283b5bc7dfad13c0adf66935bc2c4caf0f793c
9. 0x113fba6d7207bad277545f607f0a674994c5fd3f204373bd52b7784ddfeb38a2
10. 0x75fb43d121b0c7d36d6ce3843de524bb5cde5e31bd50964f1eb46e9e4d22df1f
11. 0x86993f34ffd04a19214c4b442a83218e78811798750015024990bf574868d9e8
12. 0xab729e4203b650f2a3c15efd6fd44eb2482232373bc1de662fd9d496869eb2d3
13. 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae