Evidence row 74295

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://draconic21-x402-api.onrender.com/v1/gas_price"
    ]
  ],
  "name": "d21 gas_price",
  "owner_address": "0x1520ef5530aa71350049be2903cf078b38c40ae5",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x1520Ef5530AA71350049BE2903Cf078B38c40AE5",
        "scheme": "exact"
      },
      {
        "amount": "2000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "6mc4GhWFyNcMh7gAVDWrKeYjDqFtEKWKQuZ9RTw2VkfM",
        "scheme": "exact"
      }
    ],
    "description": "Gas Price ($0.002): current Base gas market read live from Base's own public JSON-RPC, not a hosted gas-oracle vendor -- legacy gas price (eth_gasPrice), EIP-1559 base fee (latest block), and a suggested priority/max fee (eth_maxPriorityFeePerGas + a computed 2x-base-fee heuristic), all in gwei, plus a plain-transfer cost estimate. Base mainnet only. Body {} or { chain: \"base\" }. Check free /v1/gas_price/availability first.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "chain": "base"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "base_fee_gwei": 0.01,
              "caveats": [
                "Base mainnet only (eip155:8453) -- no other chain is read by this route today."
              ],
              "chain": "Base",
              "gas_price_gwei": 0.012,
              "native_symbol": "ETH",
              "suggested_max_fee_gwei": 0.021,
              "suggested_priority_fee_gwei": 0.001
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": true,
                  "properties": {
                    "chain": {
                      "description": "Only 'base' is supported today; omit or pass \"base\".",
                      "enum": [
                        "base"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "base_fee_gwei": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "block_number": {
                      "type": [
                        "integer",
                        "null"
                      ]
                    },
                    "caveats": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "chain": {
                      "type": "string"
                    },
                    "estimated_transfer_cost": {
                      "properties": {
                        "gas_units": {
                          "type": "integer"
                        },
                        "native_cost_gwei": {
                          "type": "number"
                        }
                      },
                      "type": [
                        "object",
                        "null"
                      ]
                    },
                    "gas_price_gwei": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "native_symbol": {
                      "type": "string"
                    },
                    "network": {
                      "type": "string"
                    },
                    "suggested_max_fee_gwei": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "suggested_priority_fee_gwei": {
                      "type": [
                        "number",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "chain",
                    "gas_price_gwei",
                    "caveats"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T09:49:26.646Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-25T09:49:26.407Z"
    },
    "resource": "https://draconic21-x402-api.onrender.com/v1/gas_price",
    "serviceName": "d21 gas_price",
    "tags": [
      "gas-price",
      "eip-1559",
      "base",
      "onchain-analytics",
      "transaction-fee"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Gas Price ($0.002): current Base gas market read live from Base's own public JSON-RPC, not a hosted gas-oracle vendor -- legacy gas price (eth_gasPrice), EIP-1559 base fee (latest block), and a suggested priority/max fee (eth_maxPriorityFeePerGas + a computed 2x-base-fee heuristic), all in gwei, plus a plain-transfer cost estimate. Base mainnet only. Body {} or { chain: \"base\" }. Check free /v1/gas_price/availability first."
}

What the leaf hashes

{"body":"7cd515c69dcf9d010e97259c7eaf2c21e3e32346311cb86841310e9f3a8dc86c","id":74295,"kind":"listing","method":"baseline/1","observed_us":1793025488729622,"prev":null,"subject":"x402_bazaar:https://draconic21-x402-api.onrender.com/v1/gas_price","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. 0x360f6e9dcb8ccd384c76d7fa7dfe1a70806dd5c4d9fc5fa9e711c7b329e86b42
2. 0x4d6c8e67f7545b41743005819e2bdd86a3c38d4240572702fb9e18451c7ebc23
3. 0xff17e1fc626f7cf421e200bfee874a83a126793a7394a7fd4cc58e218b33d357
4. 0xe7629fa7a21283c9a39a38fe162591a233222011fd3cc0d0df2da561681c64e4
5. 0xe867fe10b5bd8110fec7752c5d7d619f973ba33f719cc77f44e936c57ba0d6a9
6. 0xf4211c39aae5a8b9fd7669329279ded961730f6588d0ac4e63178e8594df74fd
7. 0xdf1575ed56cbd482d059d4a4ebdf001e9656fbb815171da93c265505100065c7
8. 0xd2cbe9565e7386a796cdfc7dce10f2045baa13719e32afb7363500a1ba533257
9. 0xcc6f7beb30e04033287f6137a9a1611ca83b2c850cc1e24fb826ab7245f7d371
10. 0x3b4b550f0a49402e225b6398198947525abec6713d355bfda590f5e3f7cbc218
11. 0x30ae64b0356d2a2933965306373f46f4bf64268b5a265594ef3370f079c19d92
12. 0x992ab7416b80cd368936c788f743fd3ea4576a49e22c75ab0262abf692f8ed6c
13. 0xdfc7a920beab71e6882e75c57bf136a5354c4ea989a35108a69046bc62059090
14. 0x4338355a835617a26aa0bfcc971e84eb030d84e2aa840e3c8af958921dd080c7
15. 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae