Evidence row 2241673

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://markt.halowerk.com/gas"
    ]
  ],
  "name": "HALOWERK marktwerk",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "asset": "USDC",
          "assetTransferMethod": "eip3009",
          "eip712Domain": {
            "chainId": 8453,
            "name": "USD Coin",
            "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "version": "2"
          },
          "name": "USD Coin",
          "network_name": "Base Mainnet",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "scheme": "exact"
      }
    ],
    "description": "Reads eth_feeHistory over the last ten blocks with reward percentiles 25, 50 and 75, and falls back to eth_gasPrice when a node does not serve fee history. base_fee_gwei is the base fee of the next block, not of the last one, because that is the fee a transaction sent now will actually pay. recommended_gwei is a bid, not an observation: priority at the median plus a base fee doubled to survive several full blocks, and the rule is stated in recommended_rule. cost_usd converts that into dollars fo",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "action": "erc20",
              "chain": "base"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "action": {
                      "default": "transfer",
                      "description": "Which transaction the cost estimate is for: transfer, erc20 or swap.",
                      "enum": [
                        "transfer",
                        "erc20",
                        "swap"
                      ],
                      "type": "string"
                    },
                    "chain": {
                      "default": "ethereum",
                      "description": "Chain to measure. ethereum or base.",
                      "enum": [
                        "ethereum",
                        "base"
                      ],
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-02T14:57:31.984Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-02T14:57:31.787Z"
    },
    "resource": "https://markt.halowerk.com/gas",
    "serviceName": "HALOWERK marktwerk",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Reads eth_feeHistory over the last ten blocks with reward percentiles 25, 50 and 75, and falls back to eth_gasPrice when a node does not serve fee history. base_fee_gwei is the base fee of the next block, not of the last one, because that is the fee a transaction sent now will actually pay. recommended_gwei is a bid, not an observation: priority at the median plus a base fee doubled to survive several full blocks, and the rule is stated in recommended_rule. cost_usd converts that into dollars fo"
}

What the leaf hashes

{"body":"48581700ab0e90614d27b20ce7098a84c7977ccde1e30c10b00480a7ef3f4e64","id":2241673,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793647629628634,"prev":null,"subject":"x402_bazaar:https://markt.halowerk.com/gas","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0xf00c630068c1960191fbdda92f5d2735fe093b308fb8077e9005ebc97d6bdb11
2. 0x679edefe1102e1ba205cf32156f3ff9f8a7187967949a8e701cafb687c82a05a
3. 0x4c958c80439e4bc718bff2e22ad089ca479dc2d58f446e93a4cbbe8832c93b0f
4. 0x6aae70e941c60b9f129327166522bee037fe9b71c53d87b6e7097381f0768106
5. 0x393f8ba8de3a3e3c8feee78ce07e7d8bcc0abf99a913dda6dfe025393fd8acbf
6. 0x405b6f99a49e81ddce1ad14f4e409b7b52dbaa2b8177cb7054957a7bb64914bb
7. 0x056fbaefa93f48d560e08d9be74659d2ff0eba0e7e3cf6f4ad214c3bf81222bb
8. 0xfd70c29ca38deef126e568f18e51d7d9223c6c2050af12d2cea2349500d02bc8
9. 0xe2fbe8b2178e0580bbc8927e5eed18e2698832b93cd443b175837b6e78ab36f1
10. 0x658434397547b1ef0bdbb57de2d73f031d73a7c3b4fcffda7890e2e0e358ba21
11. 0xaa2e865008eca144975b207612c7c4850c0d2e9fd52e97b061a91248b43db0e4
12. 0xfe5fafbda84768aa127517412dad46b6d52750c98fd0471847d383ba9c0ebea4
13. 0x6a66db154e32d45aa1f1ce72719d9372fd5cdf4add16d249006bd3cdb0f7c074
14. 0xbb465466dac90179fd91fd4d3b6985e80736d1ab4662dc57a78b5e5098d6f074
15. 0xde6a8fd6590b70565baa6078cbc8add8d94950fe959ebaf8c3716adcdbd78aa8
16. 0x6dd7e4db65395e8670c7c2747d44fec79e03305934ef4746bf5dbca04ec6ec49
17. 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
18. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af