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Evidence row 451879

Observed , by sync.x402_bazaar/1.

Kind
listing
About
source_record x402_bazaar:https://stall-row-production.up.railway.app/v1/gas-oracle
Recorded
Previous row
#121926
Body SHA-256
09aa055f83a5daecdc7ece3c3fa1fe7d4f89bc2d4e27fcd1fff38db8e7e7f2ec
Leaf
0x18dfe743b870f2ed2bb699594c4cf0d611be9ba6756a0dc4f5737a9bcfa1e1e5

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://stall-row-production.up.railway.app/v1/gas-oracle"
    ]
  ],
  "name": "stall-row",
  "owner_address": "0x097f9685d1e0752bf8b02d61e5ce9be7ea0fba7f",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x097f9685D1e0752bF8B02d61E5Ce9be7eA0FBA7F",
        "scheme": "exact"
      }
    ],
    "description": "Current Base gas in one call: the live gas price, the current base fee, the base-fee range across the last 20 blocks, whether fees are rising, falling, or flat, and a cheap-window hint drawn from that data. Use this when an agent wants to time a transaction instead of paying whatever the moment charges.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "as_of_epoch": 1761000000,
              "base_fee_gwei": "0.0058",
              "base_fee_max_gwei_20_blocks": "0.0079",
              "base_fee_min_gwei_20_blocks": "0.0051",
              "blocks_sampled": 20,
              "chain": "base",
              "cheapest_window_hint": "Base fee is flat across the last 20 blocks.",
              "gas_price_gwei": "0.0062",
              "latest_block": 22104511,
              "note": "Trend and hint describe the last ~20 blocks only.",
              "trend": "flat"
            },
            "schema": {
              "properties": {
                "as_of_epoch": {
                  "type": "integer"
                },
                "base_fee_gwei": {
                  "type": "string"
                },
                "base_fee_max_gwei_20_blocks": {
                  "type": "string"
                },
                "base_fee_min_gwei_20_blocks": {
                  "type": "string"
                },
                "blocks_sampled": {
                  "type": "integer"
                },
                "chain": {
                  "type": "string"
                },
                "cheapest_window_hint": {
                  "type": "string"
                },
                "gas_price_gwei": {
                  "type": "string"
                },
                "latest_block": {
                  "type": "integer"
                },
                "note": {
                  "type": "string"
                },
                "trend": {
                  "enum": [
                    "rising",
                    "falling",
                    "flat"
                  ],
                  "type": "string"
                }
              },
              "required": [
                "chain",
                "latest_block",
                "gas_price_gwei",
                "base_fee_gwei",
                "trend",
                "cheapest_window_hint"
              ],
              "type": "object"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {},
                  "required": [],
                  "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"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "as_of_epoch": {
                      "type": "integer"
                    },
                    "base_fee_gwei": {
                      "type": "string"
                    },
                    "base_fee_max_gwei_20_blocks": {
                      "type": "string"
                    },
                    "base_fee_min_gwei_20_blocks": {
                      "type": "string"
                    },
                    "blocks_sampled": {
                      "type": "integer"
                    },
                    "chain": {
                      "type": "string"
                    },
                    "cheapest_window_hint": {
                      "type": "string"
                    },
                    "gas_price_gwei": {
                      "type": "string"
                    },
                    "latest_block": {
                      "type": "integer"
                    },
                    "note": {
                      "type": "string"
                    },
                    "trend": {
                      "enum": [
                        "rising",
                        "falling",
                        "flat"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "chain",
                    "latest_block",
                    "gas_price_gwei",
                    "base_fee_gwei",
                    "trend",
                    "cheapest_window_hint"
                  ],
                  "type": "object"
                },
                "schema": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T10:13:23.659Z",
    "quality": {
      "l30DaysTotalCalls": 7,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-25T21:04:18.251Z"
    },
    "resource": "https://stall-row-production.up.railway.app/v1/gas-oracle",
    "serviceName": "stall-row",
    "tags": [
      "base",
      "gas",
      "fees",
      "data",
      "agents"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current Base gas in one call: the live gas price, the current base fee, the base-fee range across the last 20 blocks, whether fees are rising, falling, or flat, and a cheap-window hint drawn from that data. Use this when an agent wants to time a transaction instead of paying whatever the moment charges."
}

What the leaf hashes

{"body":"09aa055f83a5daecdc7ece3c3fa1fe7d4f89bc2d4e27fcd1fff38db8e7e7f2ec","id":451879,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100515615018,"prev":121926,"subject":"x402_bazaar:https://stall-row-production.up.railway.app/v1/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 (273461 rows).

  1. 0x18df91597b543339ff22fb45fc637796a02b89c07f3f7457a7286a0708adb8c5
  2. 0x8a1aa8adbea76a67c8b09c7ad84d68dc185c56b48a404165d6dd6d5cde8f02ea
  3. 0x876062ca8c0a55d3576ce14be6ad7dd92b8964f3d05b4f2ccc7e56103713eec2
  4. 0x6b64586c20bca3b448fffe303a6b1969780ef453abb9528fe90df017371a6f0a
  5. 0x3e4b572350a03ad29170c9c7e2fc196aaa45ec23cc31235cddb5d647dd8e68c5
  6. 0xdb929f5289bbe0f059091bdb157894786f015414f961b5346c7f4fbca3255436
  7. 0x7a783eb5e74fd231a9a42bae887e4426fa4c138fab9218e6913b26ae2cb110a0
  8. 0xccbc374a342cfbe6da330ec3576ad95b9990f27e6e99bcd85276d0a2b6d007ef
  9. 0x33b63d0f6c363352bc2d33f17994311ba4366a5fd6c4c263f3a19c74e774f933
  10. 0x2b19e87aeca91c4eac6c69304b561436045865acff78c8de473b73789ce9489d
  11. 0x3a308d481ae12b05ff4d5f5a64f87b375db92eb3a8ef3972c9ec3311eb3e6ae7
  12. 0x7afa806e5533c63e57a18fda23b38702b370e8b298a35edc0c1de641c8ffcaec
  13. 0xca0b37bb3b043ccf0f24c50fccd9c2f22b7e5290df49886008fc2ff55380fdd1
  14. 0x2064e3a2b01d0d12d5079bf720a0d0125e9703c55e92de54ad40c302469ec047
  15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
  16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
  17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
  18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
  19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699
Day root
0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795
Chained
0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4
Published
On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4

How to check it · This row as JSON