Evidence row 547072

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://market.561.group/v1/base-chain/gas-oracle"
    ]
  ],
  "name": "base-chain-gas-oracle",
  "owner_address": "0x32886f6f361c1d570255c2762967a2e41d0e9b1a",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x32886F6F361C1d570255c2762967A2e41D0E9B1a",
        "scheme": "exact"
      }
    ],
    "description": "Current Base network gas price, read live from a public Base RPC node (eth_gasPrice) and returned in both wei and gwei with the snapshot block it was read at.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "gweiGasPrice": 1,
              "snapshotBlock": "1",
              "weiGasPrice": "1000000000"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "gweiGasPrice": {
                      "type": "number"
                    },
                    "snapshotBlock": {
                      "type": "string"
                    },
                    "weiGasPrice": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "weiGasPrice",
                    "gweiGasPrice",
                    "snapshotBlock"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "sign-in-with-x": {
        "info": {
          "domain": "market.561.group",
          "expirationTime": "2026-10-23T22:30:34.961Z",
          "issuedAt": "2026-10-23T22:25:34.961Z",
          "nonce": "838564ae8e5cd2fe15189f55fd4eee4b",
          "resources": [
            "https://market.561.group/v1/base-chain/gas-oracle"
          ],
          "statement": "Sign in to use what this wallet has been granted at market.561.group.",
          "uri": "https://market.561.group/v1/base-chain/gas-oracle",
          "version": "1"
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "address": {
              "type": "string"
            },
            "chainId": {
              "type": "string"
            },
            "domain": {
              "type": "string"
            },
            "expirationTime": {
              "type": "string"
            },
            "issuedAt": {
              "type": "string"
            },
            "nonce": {
              "type": "string"
            },
            "notBefore": {
              "type": "string"
            },
            "requestId": {
              "type": "string"
            },
            "signature": {
              "type": "string"
            },
            "statement": {
              "type": "string"
            },
            "type": {
              "type": "string"
            },
            "uri": {
              "type": "string"
            },
            "version": {
              "type": "string"
            }
          },
          "required": [
            "domain",
            "address",
            "uri",
            "version",
            "chainId",
            "type",
            "nonce",
            "issuedAt",
            "signature"
          ],
          "type": "object"
        },
        "supportedChains": [
          {
            "chainId": "eip155:8453",
            "type": "eip191"
          }
        ]
      }
    },
    "lastUpdated": "2026-10-23T22:25:35.174Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-23T22:25:33.58Z"
    },
    "resource": "https://market.561.group/v1/base-chain/gas-oracle",
    "serviceName": "base-chain-gas-oracle",
    "tags": [
      "base",
      "chain-data",
      "gas"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current Base network gas price, read live from a public Base RPC node (eth_gasPrice) and returned in both wei and gwei with the snapshot block it was read at."
}

What the leaf hashes

{"body":"c70b616323c08954ce7143658205a966c11d5a43e8fc7c61c7d4cbcd2946926b","id":547072,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133171618555,"prev":77394,"subject":"x402_bazaar:https://market.561.group/v1/base-chain/gas-oracle","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. 0x6ded1fa4f358b5a68abfd487462e7edcac577b76b0ec7a65f378787a83aeeec9
2. 0x5983821632c3b189091475b5547a4575b57919ea019e8c3927b931b32480fab0
3. 0xeaeafc83b85092697ed163c479c40c2627c1b364e66c7bbd027c0f749065d755
4. 0x43d7fd5cc5f77c145cf4c9867d807cf21bbe5f2ec5b8e9fb37081f7459b14d5c
5. 0x7bdfe7bcafdbc17e001fd3ca2624159ef7c1bbb2fcddba593856ff08880a0222
6. 0x0b3e9b61c6c3c5936fad956dee048db3c9fac125bf9272e1728e88d63f510b0a
7. 0x1ad41a8e26624fff2095d8685bb895b9ef2a05d55e3c611caf2a5bc5222b8707
8. 0x69a4b2c36d76431f74f77b72ab4c45a54c3ac10921dd7a00cb731feb9b5ef355
9. 0x3acb1e5a23b29f2ee95bc3d1e9c5ef5da717c882179fff236ce0486ebb8d235f
10. 0xe2b472357e9ff38d3b98052f32d21c17393ef6ece4f6a91ba098b953884f8b88
11. 0x9534043bccaeacbfdb40509a3cb8a4f8614485443c01b7e67d6564caccea7d5a
12. 0x346adc8ebb20cf5f1a3349535238f6ff723da69f956f4b8324d3ec6271a3c969
13. 0xa7e162a9119a39c37b96b3483510d3fd108f25676fe3a9584241629612b01526
14. 0xb2ae53d841a55a805fb4078b1a7d44e08a81aba4be3690bac3a5b4c366bf39da
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4