Evidence row 72042

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ca-tax-api-mainnet.lxtap.workers.dev/arbitrum/gas?"
    ]
  ],
  "name": "Arbitrum One Onchain Data",
  "owner_address": "0x2ecb9e1fcca7a62758c679f11bc3241466d181d8",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2ECB9E1fcca7A62758c679F11bC3241466d181d8",
        "scheme": "exact"
      }
    ],
    "description": "Current Arbitrum One gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "baseFeeGwei": "0.020256",
              "blockNumber": 517269449,
              "blockTime": "2026-10-22T15:50:24.000Z",
              "chain": "arbitrum",
              "estimatedCost": {
                "erc20Transfer": {
                  "native": "0.00000131664",
                  "usd": 0.003151
                },
                "nativeTransfer": {
                  "native": "0.000000425376",
                  "usd": 0.001018
                }
              },
              "gasPriceGwei": "0.020256",
              "maxPriorityFeeGwei": "0",
              "nativeSymbol": "ETH",
              "nativeUsd": 2392.97,
              "note": "Excludes Arbitrum One's L1 data fee, which adds a small amount per transaction."
            },
            "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": {},
                  "required": [],
                  "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": "2026-10-22T15:57:33.074Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-22T15:57:32.942Z"
    },
    "resource": "https://ca-tax-api-mainnet.lxtap.workers.dev/arbitrum/gas?",
    "serviceName": "Arbitrum One Onchain Data",
    "tags": [
      "arbitrum",
      "onchain",
      "erc20",
      "token",
      "wallet"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current Arbitrum One gas conditions: block number, base fee, gas price and priority fee in gwei, and the estimated cost in ETH and USD of a native transfer and an ERC-20 transfer (Chainlink ETH/USD)."
}

What the leaf hashes

{"body":"fe658b6687e9a8d117cd4c01da27c21a4505046b07df51db7aa4946dcbc39aa1","id":72042,"kind":"listing","method":"baseline/1","observed_us":1793025485162799,"prev":null,"subject":"x402_bazaar:https://ca-tax-api-mainnet.lxtap.workers.dev/arbitrum/gas?","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. 0xa2b43e2541f0f7de310f42e4b38e4c01f0067b980462b703f1ccdc39348d6642
2. 0xf55f61b25f0b1a179a713919cf97ef64bb89cf462fcd4e7a0c9de15a2270e2d8
3. 0xfb0c514e9d23caf24adc7dd88ecdcdc52f9822c5a44fbfb4f34482867737c662
4. 0xacbd577587ef1f4e641e5d6db6c94151ca3ddf964de5bcfbfe64d1a56cf7a3af
5. 0x5d10b032ba2fe42278ecdfbfc3057c4675bc74bf04a656977f506dd5dac3c5da
6. 0x611d5238d8931ff443c5cf07d98beda0a7c18b11b4c6fc100f575225bb832327
7. 0x8b92d9dc2e709bce5f2a89de5d7d10e0f47cee5e5e8c10787f6527ac1b046e98
8. 0x282428da0cc2812b2aeb8ac1bc752cda0213b0cb101832851ec239459927f012
9. 0x502a5823cf001ec8a2d508629aa4ebb10cb60650ff6dd0ab9c4cebb840e0e4e9
10. 0xb3a29351e1b8013225f7601a802293835d75b405261ddeb88b2d8f50a6ded3ac
11. 0xd2bc27d81a73a53b7c724da36f189ebdd2fef396490722c3ee66192b798d20d0
12. 0x19537c574979327583a539261287714af2eee831125de819abab0f155acd3a75
13. 0xc34c13c58ba9c342ea1b833ac1882a4aea22777c4fd1092b2f83d3bac6b9f845
14. 0x428106f4ae4ec142f17aebf6fa50935242f8d3f1c211cf95d6351d03d11da2b7
15. 0x62a900133713919f4eed33d8336876b7a6d538233b8a4f3ed03b29aa44f5bad0
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae