Evidence row 72054

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ca-tax-api-mainnet.lxtap.workers.dev/base/gas"
    ]
  ],
  "name": "Base 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 Base 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": "0.005",
              "blockNumber": 52947425,
              "blockTime": "2026-10-22T15:49:57.000Z",
              "chain": "base",
              "estimatedCost": {
                "erc20Transfer": {
                  "native": "0.00000039",
                  "usd": 0.0009317
                },
                "nativeTransfer": {
                  "native": "0.000000126",
                  "usd": 0.000301
                }
              },
              "gasPriceGwei": "0.006",
              "maxPriorityFeeGwei": "0.001",
              "nativeSymbol": "ETH",
              "nativeUsd": 2388.88,
              "note": "Excludes Base'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": "2026-10-23T08:36:18.763Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T08:36:18.372Z"
    },
    "resource": "https://ca-tax-api-mainnet.lxtap.workers.dev/base/gas",
    "serviceName": "Base Onchain Data",
    "tags": [
      "base",
      "onchain",
      "erc20",
      "token",
      "wallet"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current Base 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":"9f16ebf2835750233042994818bfbfdc03a3ad81760950a90c4736a7a0f7e8d8","id":72054,"kind":"listing","method":"baseline/1","observed_us":1793025485199826,"prev":null,"subject":"x402_bazaar:https://ca-tax-api-mainnet.lxtap.workers.dev/base/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. 0x6543eb5c5699e050813774a0f38999d2cdd89415f9e5f2a6d68adb54f2a5b5f8
2. 0xab8212f817a33a27c5b557c0c11cbaabc7e1d4006b996abd9ad40d055332639e
3. 0x40642a3a2c64f0da6a37b53b6302a4c2609d4849c989621e60e93170501a3f12
4. 0xd60eea71c9e64575c790415b06a324c7b70f974d4ee7a82337322f09f9c01b07
5. 0xe7024e0e84f8059daa94548962522114e44c1bf9d4728e48a151f5f358744093
6. 0x2a8eea08a8b0ce92b573122a45547a1cb552979e55303d2f4962c69291e9fe15
7. 0x61030fe23f4d276ce93b167d627001f3d46424f0526da91037ef5a1400a40a39
8. 0x783fd807d1f03adeed3f1766a928c35c75d051fd7f20233980922f5b25aafd4c
9. 0x99e5d6706be7a42fa8f66626946e344567a34e5706fbfe7eb4a69dd3ab2ec578
10. 0x4f5003bce752e6ac469e47bf82675ea21f50214ee22f0e5008b8629a3298bfbd
11. 0x2184826674dda59cfc6d24bc12b2c70a5f4db29f874e67fded919c1410503d2e
12. 0x611b1c1b68d04a71934006e383071a8f3836400d60beb86d81dd038bc102029f
13. 0x13f4b94ecf613d585c952b5363dad2b247a55371eb8e358bb89dc033e83128b1
14. 0x9a79c65e077cd9da9d436b3ade6f5ddc0d244510c4d5903ef2f02d81205f7666
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae