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Evidence row 125508

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://x402-tools-production-2755.up.railway.app/tools/gas
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
b77a5958de652f65e12cd1ebc1853036264320da572f78ecab0f3a134cd3f01c
Leaf
0xd83707b92027db18115be1e741dcd72360f61ee65f3d435b519fc22b406c3b2a

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-tools-production-2755.up.railway.app/tools/gas"
    ]
  ],
  "name": "x402 tools",
  "owner_address": "0xef7674f50f84e9b9a89af9dc40ffea56edf67d6c",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xef7674f50f84e9b9a89af9dc40ffea56edf67d6c",
        "scheme": "exact"
      }
    ],
    "description": "Use before sending an EVM transaction to pick the cheapest chain and set its fees. Live gas on Ethereum, Base, Arbitrum, Optimism, Polygon and BSC: slow/standard/fast EIP-1559 fee tiers (priority fee, maxFee) from recent blocks, plus the USD cost of a transfer, ERC-20 transfer and swap per tier, cheapest chain first.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "chains": "base,ethereum"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "chains": [
                {
                  "baseFeeGwei": 0.005,
                  "chain": "base",
                  "chainId": 8453,
                  "costs": {
                    "erc20Transfer": {
                      "native": 3.9e-7,
                      "usd": 0.00107
                    },
                    "swap": {
                      "native": 9e-7,
                      "usd": 0.0025
                    },
                    "transfer": {
                      "native": 1.26e-7,
                      "usd": 0.00035
                    }
                  },
                  "gasPriceGwei": 0.006,
                  "nativeSymbol": "ETH",
                  "nativeUsd": 2734.49,
                  "tiers": {
                    "fast": {
                      "costs": {
                        "transfer": {
                          "native": 5.6e-7,
                          "usd": 0.00152
                        }
                      },
                      "effectiveGwei": 0.0266,
                      "maxFeeGwei": 0.0316,
                      "priorityFeeGwei": 0.0216
                    },
                    "slow": {
                      "costs": {
                        "transfer": {
                          "native": 1.05e-7,
                          "usd": 0.00029
                        }
                      },
                      "effectiveGwei": 0.005,
                      "maxFeeGwei": 0.01,
                      "priorityFeeGwei": 0
                    },
                    "standard": {
                      "costs": {
                        "transfer": {
                          "native": 1.26e-7,
                          "usd": 0.00035
                        }
                      },
                      "effectiveGwei": 0.006,
                      "maxFeeGwei": 0.011,
                      "priorityFeeGwei": 0.001
                    }
                  }
                }
              ],
              "gasUsed": {
                "erc20Transfer": 65000,
                "swap": 150000,
                "transfer": 21000
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "chains": {
                      "description": "Comma-separated subset of: ethereum, base, arbitrum, optimism, polygon, bsc. Default: all",
                      "type": "string"
                    }
                  },
                  "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": "2026-10-14T03:16:41.059Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-14T03:16:40.861Z"
    },
    "resource": "https://x402-tools-production-2755.up.railway.app/tools/gas",
    "serviceName": "x402 tools",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Use before sending an EVM transaction to pick the cheapest chain and set its fees. Live gas on Ethereum, Base, Arbitrum, Optimism, Polygon and BSC: slow/standard/fast EIP-1559 fee tiers (priority fee, maxFee) from recent blocks, plus the USD cost of a transfer, ERC-20 transfer and swap per tier, cheapest chain first."
}

What the leaf hashes

{"body":"b77a5958de652f65e12cd1ebc1853036264320da572f78ecab0f3a134cd3f01c","id":125508,"kind":"listing","method":"baseline/1","observed_us":1793025626405161,"prev":null,"subject":"x402_bazaar:https://x402-tools-production-2755.up.railway.app/tools/gas","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).

  1. 0xd8375a90fa6b3054a7c353b920a71a42a343418cfbbc461cf798c5588845244e
  2. 0xb2836c359cb5b08589d3b9aaae8f37a9f4aab336fed06935d00d6ab405e722d0
  3. 0xf72cae7dcc2492991d46f3d6e8eba48726b5f648d3119141fc4c3aff6dd40d28
  4. 0x28e291626aaa7e82a6a91e7eebaf5f9ea9c450cac4c539d5512b242e226b8e3b
  5. 0x9063fb560d6e6b16deb6323b5a5fe5f1af162fdc227ab646e723189791fb7e53
  6. 0x0f08eed565f082f46c464dfbe5209ed421389588d8437cdc91399725726a3554
  7. 0xd9bc405dcac5c95d6e26a3d74b9e0783bbd99ec2de855382eebe76d9f4e5df5e
  8. 0x5f413c94bce5ca3155ae3825bc0b30a8412f4bd8204b0c471c165742e6c0cb0e
  9. 0x9754378ea7ac1d291fd46f945e1a2ad82fa1ca5e9d27632f20194abae2857dfc
  10. 0x60bb9965ad3bbe169d5f64f7e3edfb9a565192c04e9f5f80c664e2fefe04706e
  11. 0x2671a86f48dece064e871ca46396549de6c07bd09915bed27b7ac95a735127fd
  12. 0x07e91966e8a0c43a0725bd3d523259064a93333c2900e6171b69ffbfd9f423f1
  13. 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
  14. 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
  15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
  16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
  17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON