← The evidence ledger
Evidence row 2202218
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://world-cities.x402tookit.com/city-distance
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 46ebbd17b22b0a7e0d67a3c7360304fb1340ac63b4a4643cbade552ca01ec098
- Leaf
- 0x6acf2ab7cffbe07d6785f134c5ce42b0737e66c06f86a1cde67702b16dd24d53
What was observed
{
"endpoints": [
[
"x402",
"https://world-cities.x402tookit.com/city-distance"
]
],
"name": "World Cities",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
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},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Great-circle distance in km, miles and nautical miles plus bearing between two cities, resolved by name.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"from": "London",
"fromCountry": "GB",
"to": "Paris",
"toCountry": "FR"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T06:28:04.582Z",
"attribution": "City data: GeoNames (geonames.org), licensed CC BY 4.0, cities15000 snapshot 2026-10-21. Crowd-edited; populations and coordinates may be dated.",
"degraded": false,
"direction": "SSE",
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"distanceKm": 343.8,
"distanceMiles": 213.6,
"distanceNauticalMiles": 185.6,
"from": {
"admin1Code": "ENG",
"admin1Name": "England",
"asciiName": "London",
"country": "GB",
"countryName": "United Kingdom",
"elevationM": 25,
"geonameId": 2643743,
"lat": 51.50853,
"lon": -0.12574,
"name": "London",
"population": 8961989,
"role": "national capital",
"timezone": "Europe/London"
},
"initialBearingDeg": 148,
"notChecked": [
"road, rail or flight route distance (straight line over a spherical Earth)",
"the exact point inside each city (GeoNames uses one representative coordinate)",
"…1 more"
],
"reasons": [
"Great-circle distance on a sphere of radius 6371.0088 km; real routes are longer."
],
"source": "GeoNames cities15000 (CC BY 4.0)",
"summary": "London, GB to Paris, FR: 344 km (214 mi), initial bearing 148 degrees SSE.",
"to": {
"admin1Code": "11",
"admin1Name": "Ile-de-France",
"asciiName": "Paris",
"country": "FR",
"countryName": "France",
"elevationM": 42,
"geonameId": 2988507,
"lat": 48.85341,
"lon": 2.3488,
"name": "Paris",
"population": 2138551,
"role": "national capital",
"timezone": "Europe/Paris"
},
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"from": {
"description": "Origin city, e.g. London or 'Paris, FR'",
"type": "string"
},
"fromCountry": {
"description": "Country of the origin to disambiguate",
"type": "string"
},
"to": {
"description": "Destination city, e.g. Paris",
"type": "string"
},
"toCountry": {
"description": "Country of the destination to disambiguate",
"type": "string"
}
},
"required": [
"from",
"to"
],
"type": "object"
},
"type": {
"const": "http",
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},
"required": [
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],
"type": "object"
},
"output": {
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"attribution": {
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},
"degraded": {
"type": [
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"null"
]
},
"direction": {
"type": [
"null",
"string"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"distanceKm": {
"type": [
"null",
"number"
]
},
"distanceMiles": {
"type": [
"null",
"number"
]
},
"distanceNauticalMiles": {
"type": [
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"number"
]
},
"from": {
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},
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},
"country": {
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},
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},
"elevationM": {
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},
"geonameId": {
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},
"lat": {
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},
"lon": {
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},
"name": {
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"population": {
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},
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"timezone": {
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}
},
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},
"initialBearingDeg": {
"type": [
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]
},
"notChecked": {
"items": {
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},
"type": [
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]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
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"string"
]
},
"summary": {
"type": [
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"string"
]
},
"to": {
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"null",
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},
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},
"asciiName": {
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},
"country": {
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},
"countryName": {
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},
"elevationM": {
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]
},
"geonameId": {
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},
"lat": {
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},
"lon": {
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"name": {
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"population": {
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"role": {
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"timezone": {
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"verdict": {
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}
},
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"type": {
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},
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},
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}
}
},
"lastUpdated": "2026-11-01T22:38:18.63Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-01T22:38:18.423Z"
},
"resource": "https://world-cities.x402tookit.com/city-distance",
"serviceName": "World Cities",
"tags": [
"distance",
"great-circle",
"cities",
"bearing"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Great-circle distance in km, miles and nautical miles plus bearing between two cities, resolved by name."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af