← The evidence ledger
Evidence row 2202242
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://aviation-calc.x402tookit.com/fuel-time-distance
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- fec077802d8bb74e252891bdf416925547d6e4a1b2fa0ecac26349fb428bf11e
- Leaf
- 0xc4941158e1152e36006c1580dc59a089ac56795bb0676098798f63fb72910393
What was observed
{
"endpoints": [
[
"x402",
"https://aviation-calc.x402tookit.com/fuel-time-distance"
]
],
"name": "Aviation Calculators",
"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
]
},
"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": "E6B arithmetic: give any two of distance, groundspeed and time for the third, plus fuel burn, reserve and range.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"distanceNm": 150,
"fuelFlowPerHour": 8,
"fuelOnBoard": 30,
"groundspeedKt": 120,
"reserveMin": 45
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T14:44:08.060Z",
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"distanceNm": 150,
"enduranceHhMm": "3:45",
"enduranceHours": 3.75,
"enduranceToReserveHhMm": "3:00",
"fuelFlowPerHour": 8,
"fuelOnBoard": 30,
"fuelRemainingAtLanding": 20,
"groundspeedKt": 120,
"maxRangeNmNoReserve": 450,
"notChecked": [
"fuel for taxi, climb, approach and a missed approach: enter a realistic average flow",
"winds aloft changes along the route, which change groundspeed",
"…2 more"
],
"rangeNmToReserve": 360,
"reasons": [
"Time = distance / groundspeed; fuel = flow x time; range = (fuel on board - reserve) / flow x groundspeed.",
"Groundspeed is true airspeed corrected for wind (see /wind-triangle)."
],
"remainingMinutesAtLanding": 150,
"reserveFuel": 6,
"reserveMin": 45,
"source": "computed locally",
"summary": "150 nm at 120 kt takes 1:15 (75 min). Trip fuel 10 at 8 per hour. On landing 20 remains (150 min) against a 45 min reserve of 6: enough fuel with reserve. Range to reserve 360 nm.",
"timeHhMm": "1:15",
"timeMin": 75,
"tripFuel": 10,
"verdict": "ENOUGH_FUEL_WITH_RESERVE"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"distanceNm": {
"description": "Distance in nautical miles",
"type": "number"
},
"fuelFlowPerHour": {
"description": "Fuel burn per hour in your unit (gallons, litres, pounds)",
"type": "number"
},
"fuelOnBoard": {
"description": "Usable fuel on board in the same unit, to check the reserve and range",
"type": "number"
},
"groundspeedKt": {
"description": "Groundspeed in knots",
"type": "number"
},
"reserveMin": {
"description": "Reserve in minutes, 0 to 240 (default 45; US VFR rules are 30 minutes day, 45 night, and IFR needs 45 beyond the alternate)",
"type": "number"
},
"timeMin": {
"description": "Time in minutes",
"type": "number"
}
},
"required": [],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"distanceNm": {
"type": [
"null",
"number"
]
},
"enduranceHhMm": {
"type": [
"null",
"string"
]
},
"enduranceHours": {
"type": [
"null",
"number"
]
},
"enduranceToReserveHhMm": {
"type": [
"null",
"string"
]
},
"fuelFlowPerHour": {
"type": [
"null",
"number"
]
},
"fuelOnBoard": {
"type": [
"null",
"number"
]
},
"fuelRemainingAtLanding": {
"type": [
"null",
"number"
]
},
"groundspeedKt": {
"type": [
"null",
"number"
]
},
"maxRangeNmNoReserve": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"rangeNmToReserve": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"remainingMinutesAtLanding": {
"type": [
"null",
"number"
]
},
"reserveFuel": {
"type": [
"null",
"number"
]
},
"reserveMin": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"timeHhMm": {
"type": [
"null",
"string"
]
},
"timeMin": {
"type": [
"null",
"number"
]
},
"tripFuel": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:37:35.266Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:37:35.015Z"
},
"resource": "https://aviation-calc.x402tookit.com/fuel-time-distance",
"serviceName": "Aviation Calculators",
"tags": [
"aviation",
"e6b",
"fuel",
"flight-planning",
"calculator"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "E6B arithmetic: give any two of distance, groundspeed and time for the third, plus fuel burn, reserve and range."
}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