← The evidence ledger
Evidence row 76972
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://klima.halowerk.com/v1/fuel-co2
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 2fd04cc207ca092c19ca631677bec22650d5620f085c8c4cc787235eac0f5ace
- Leaf
- 0xf07bd0cc20d450a5441882e2606df85fc48e69c4c9276857f3cf62c749496994
What was observed
{
"endpoints": [
[
"x402",
"https://klima.halowerk.com/v1/fuel-co2"
]
],
"name": "klima.halowerk.com/v1/fuel-co2",
"owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
"raw": {
"accepts": [
{
"amount": "4000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"asset": "USDC",
"assetTransferMethod": "eip3009",
"eip712Domain": {
"chainId": 8453,
"name": "USD Coin",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"version": "2"
},
"name": "USD Coin",
"network_name": "Base Mainnet",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"scheme": "exact"
}
],
"description": "Calculates TTW and WTW fuel emissions from separately published factors. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"quantity": 100,
"source": {
"published_at": "2026-06-10T00:00:00Z",
"title": "UK 2026 conversion factors",
"url": "https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2026"
},
"ttw_factor": 2,
"unit": "litre",
"wtw_factor": 2.5
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"quantity": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
},
"source": {
"additionalProperties": false,
"properties": {
"published_at": {
"format": "date-time",
"type": "string"
},
"title": {
"description": "",
"maxLength": 300,
"minLength": 3,
"type": "string"
},
"url": {
"format": "uri",
"type": "string"
}
},
"required": [
"url",
"published_at",
"title"
],
"type": "object"
},
"ttw_factor": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
},
"unit": {
"description": "",
"maxLength": 512,
"minLength": 1,
"type": "string"
},
"wtw_factor": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
}
},
"required": [
"quantity",
"unit",
"ttw_factor",
"wtw_factor",
"source"
],
"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"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-23T01:47:01.773Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-23T01:47:01.359Z"
},
"resource": "https://klima.halowerk.com/v1/fuel-co2",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Calculates TTW and WTW fuel emissions from separately published factors. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice."
}What the leaf hashes
{"body":"2fd04cc207ca092c19ca631677bec22650d5620f085c8c4cc787235eac0f5ace","id":76972,"kind":"listing","method":"baseline/1","observed_us":1793025493192160,"prev":null,"subject":"x402_bazaar:https://klima.halowerk.com/v1/fuel-co2","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).
- 0xf07c0cbecf6534555eb18191da703bca45f5c0116c7ea52a481bf69b09815861
- 0xd123bbe71ffd1f435194710b5cfa8c1cf7d8de2533076874c39fb148b726b44e
- 0x55484e9093d83ec01b9afccbbb2a924f7f2388222de92cfd8564494ff0209135
- 0x73cb8abf297258ef2c27c8b9bd1da1a46db1f613eccc24ece86784250c9b4e78
- 0xcf54bf5e32f7fefa18d0d44a33fd4e960b9446a1125182c33a4e881c6c48b539
- 0x0f1f6c749cd4e547b128046b3779ab00042d94ae3f1f8769ab06b348106b0e96
- 0xf7ba085e714c6c1493aa9e7f71ec07dab1e0e80869d281aa7a8c904d4affa905
- 0x516bfe86f5db02c86a4c6716198b5f9c81cfb17909af437529a81a08c60ed6a8
- 0x094a30cb7609dc76fde729dec9d76d262b60aa124f3134d89f118887fb898391
- 0x389d97fa6eba88bb8e335e895af9e7f0303b1e8f95715aa7815d36f1ba2bfcf5
- 0x514d76e971925e71327eba8800da6dbdf3c60a7c174890b0694dc64fd775ac72
- 0x4d2e94451b5ffc570a23dee9d1525bc305f1009994ffe23d8e2e7d45c60f6209
- 0xa26f0437cba4d7d64f1cf98bf4f490e1ebb6f66a5e2331537b7ba8b3061084e0
- 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
- 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
- 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
- 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae