Evidence row 526847

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://plainchain.appin60.com/v1/gas"
    ]
  ],
  "name": "plainchain.appin60.com/v1/gas",
  "owner_address": "0xb442dacae60c07bb5db8f33c8a6c1572d8f24e83",
  "raw": {
    "accepts": [
      {
        "amount": "1042",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xB442daCAE60C07bb5dB8f33C8a6c1572d8F24e83",
        "scheme": "exact"
      }
    ],
    "description": "Current gas price on Base, Arbitrum, Ethereum or Optimism, with the USD cost right now of an ETH transfer, ERC-20 transfer, DEX swap and NFT mint. Use before sending a transaction to pick a chain or decide whether to wait.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "chain": "base"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "baseFeeGwei": 0.005,
              "block": 36581662,
              "chain": "Base",
              "chainId": 8453,
              "estimates": {
                "dexSwap": {
                  "eth": 0.00000108,
                  "gas": 180000,
                  "usd": 0.00273
                },
                "erc20Transfer": {
                  "eth": 3.9e-7,
                  "gas": 65000,
                  "usd": 0.000986
                },
                "ethTransfer": {
                  "eth": 1.26e-7,
                  "gas": 21000,
                  "usd": 0.000318
                }
              },
              "ethUsd": 2527.2,
              "gasPriceGwei": 0.006,
              "priorityFeeGwei": 0.001
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "chain": {
                      "description": "base (default), arbitrum, ethereum or optimism; chain ids 8453, 42161, 1, 10 also work",
                      "type": "string"
                    }
                  },
                  "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": "2026-10-27T10:11:57.737Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-27T10:11:56.813Z"
    },
    "resource": "https://plainchain.appin60.com/v1/gas",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current gas price on Base, Arbitrum, Ethereum or Optimism, with the USD cost right now of an ETH transfer, ERC-20 transfer, DEX swap and NFT mint. Use before sending a transaction to pick a chain or decide whether to wait."
}

What the leaf hashes

{"body":"cba263a2e37c6265ab38ab598f3104a56c7d9199412b7ff58b758f0dfa67363c","id":526847,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124792224199,"prev":452661,"subject":"x402_bazaar:https://plainchain.appin60.com/v1/gas","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xb106964c0fd1c3b112d91a2a060c443e55eddcbc3df794a255c22bb1006b9d4e
2. 0x43f80172d6cb86839b056eb4622201d19aa2ba197a28eecebbe729ff9e574e22
3. 0xefea77557f440fbdbdf7a8bb25878b194f47cb5d7db857ec526845579ab41f80
4. 0x72fa3b51078231ff1b4e30dbae103110d44c6069c84a5b4241b9e55f732cc3f1
5. 0x7bd924034ba8b3550baf724eb90b7ce2d8e349720b0b031f587b5b00fac2fd23
6. 0x6d156c51ec4c213ce44d185126c412f7d0cb029f5f20efcbb95dc2523f85a402
7. 0xecc9ce0398c18b84a6f2fe76555f57eead5165ef1c3838bfff823ce59832de54
8. 0x572d90530fad2ee420036c938f41f7310f686e9d063d0ce31a8b939565776c43
9. 0x0c445e2d500ee3bf632cdaa147af56d7190c0c428cc8139fd4ba99e1839d16b0
10. 0x2c5b1e13d4478ed11368b574812b32ce4d13fc0bc1e0407c6559458f25720fa4
11. 0x56e7aed5204b5b8c5add89512d1cb8ce0fb6387142ec4c11a09b2afad3fc0a97
12. 0x6413c10d59083704c26ae4eedf79ca24dbf9c92cad846aac6f2a11f02ab3b17b
13. 0x4c82d20074b9d7d77e728b0250a2c662412d8d0f7eccff2d8100bfcc4434597f
14. 0x98c6ed3e7b5bb7f1757a8660af410226a11dd563bf83010040c2ce059ab45e54
15. 0xec7bb68216a4deb1960acfbbd75da88f7e468b58adb9cf3ec62f2790e46508b3
16. 0x64c405a28e8819716221eb2529fe4ce277ab08025e17e685cbd5ece75ceb75c7
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4