Evidence row 452661

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": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-25T20:38:29.287Z"
    },
    "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":"a13f966899e39bcffc3b2fbdabcffd548d603003c1e507f81b4da60256a298d3","id":452661,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100554250850,"prev":118556,"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. 0x5bb85d415c08cff0a4a9dfe906e9f2a07a369c5094f4c9850a4826732f8b28ca
2. 0xf2937a5b3747ec4498daa6a859fc933a49e5d69c90d387d3637afe5dfec1b3ed
3. 0xb1284753e21b7caf255f67f4b9dc38495836976a81f47ebeba2b5ffee0210f6a
4. 0x887d2438162fa8fdb0758d9f64e62b999051352aba9e0ec0daccc90e4379acf4
5. 0x3dfc239ac7d8890621219be22fc177d2e7e03fb26b8867b19b89db3a30f3da29
6. 0x1eb3308f018a0015873af9b5f5129b2bfc9792a89299c0cecdca890085e5b16f
7. 0x7adc8f09825a159ba6181b626dae17773f5347ed8d6cd19427bf6d44c5879251
8. 0x38ac5ae34880dd57725115a748969e9b66fb6bfb4d7779a3d667ea4d654d41d3
9. 0x2a4eba1489d538a25b4d7d958d8f108e2408d2c3571e64241b8e1db1b9eea46e
10. 0x34609b4680e3eed53a7c5a7e6737b62a6cdb03d45e071798749af092dfb4d679
11. 0x2d219b1e0544e01cd0a0543f34de9ec53392c428e9c0deac7c16fabc7482887f
12. 0x8b6f2e00ca53627a556efa28a330329defff6f53091e97b18db21c58436307cd
13. 0x5b3213451efe1e2950dd287afaede00cc8a45dfd9721ef9b3d698bde1eeb9909
14. 0x674bc1173d39130be4d15bbfc7327f8a8af87eb251e54c8d4409c7e840b9e538
15. 0xb78ea6a255dd06e2f402a1a733bca392fa6243920bcba95e8b80bdfc6ce5f553
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4