← The evidence ledger
Evidence row 119955
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/geo/geodesic
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- a0b0562073ba783a0da6e028f33963c3b4a6d0e409b769b8134fce23de129752
- Leaf
- 0xa2a2e25bd2dfb65ad1b988ae39d31be896f30cdb8951a1263c514f680c6d3a18
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/geo/geodesic"
]
],
"name": "Saylor Innovations Data Desk",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:geodesic",
"name": "USD Coin",
"note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:8453",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:geodesic",
"name": "USD Coin",
"note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:137",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:datadesk:geodesic",
"name": "USD Coin",
"note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
"version": "2"
},
"maxTimeoutSeconds": 120,
"network": "eip155:42161",
"payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
"memo": "saylor:datadesk:geodesic",
"reference": "EgLr3nA6itMKG4wZKLizKfFQVwrjsKP6hrSmLt6AEEQx",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZW9kZXNpYyIsInJlZmVyZW5jZSI6IkVnTHIzbkE2aXRNS0c0d1pLTGl6S2ZGUVZ3cmpzS1A2aHJTbUx0NkFFRVF4IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1NjI5NzQwNzV9.qmf69vBMbXALu2OMPA-dTjX-R4x6qQ-IFYIYJ1gvwDA"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "10000",
"asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
"extra": {
"feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
"memo": "saylor:datadesk:geodesic",
"reference": "GNPs1nEtgmyhSKM64txThxfDz5Jix3c7iT6QvoAT5kG8",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZW9kZXNpYyIsInJlZmVyZW5jZSI6IkdOUHMxbkV0Z215aFNLTTY0dHhUaHhmRHo1Sml4M2M3aVQ2UXZvQVQ1a0c4IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI1NjI5NzQwNzV9.PYk7i7vIejmkGaEEOHdzSiqGGCqgeJxamXQvmWjxNs4"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
},
{
"amount": "91838",
"asset": "So11111111111111111111111111111111111111112",
"extra": {
"memo": "saylor:datadesk:geodesic",
"native": true,
"note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
"quotedLamports": "94679",
"reference": "9oG1vapqzXyknJRRKY4EmT85bwYZpBRDTCL6R2uiUVfM",
"session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpnZW9kZXNpYyIsInJlZmVyZW5jZSI6IjlvRzF2YXBxelh5a25KUlJLWTRFbVQ4NWJ3WVpwQlJEVENMNlIydWlVVmZNIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkxODM4LCJleHAiOjE3OTI1NjI5NzQwNzZ9.0lvdMZ9wbt8mkWC5Mw7YdPQ6uEPIgQxojjHSVpzuYI4",
"solUsdPrice": 105.62
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Accurate WGS-84 distance and bearings between two coordinates with Vincenty, or the destination point from a start, bearing and distance",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"lat1": "40.6413",
"lat2": "51.47",
"lon1": "-73.7781",
"lon2": "-0.4543"
},
"type": "http"
},
"output": {
"example": {
"difference_vs_haversine_m": 14889.8,
"distance_km": 5554.9088,
"distance_m": 5554908.79,
"distance_miles": 3451.6603,
"distance_nautical_miles": 2999.4108,
"ellipsoid": "WGS-84",
"final_bearing_deg": 107.9828,
"from": {
"lat": 40.6413,
"lon": -73.7781
},
"haversine_km": 5540.019,
"initial_bearing_deg": 51.3816,
"initial_compass": "NE",
"method": "Vincenty inverse (WGS-84), accurate to about 0.5 mm",
"mode": "inverse",
"source": "Vincenty formulae on the WGS-84 ellipsoid",
"to": {
"lat": 51.47,
"lon": -0.4543
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"lat1": {
"description": "Start latitude",
"type": "string"
},
"lat2": {
"description": "End latitude (for distance)",
"type": "string"
},
"lon1": {
"description": "Start longitude",
"type": "string"
},
"lon2": {
"description": "End longitude",
"type": "string"
}
},
"required": [
"lat1",
"lon1",
"lat2",
"lon2"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"destination": {
"description": "Destination",
"type": [
"object",
"null"
]
},
"difference_vs_haversine_m": {
"description": "Difference vs haversine m",
"type": [
"number",
"null"
]
},
"distance_km": {
"description": "Distance in kilometres",
"type": "number"
},
"distance_m": {
"description": "Distance, in metres",
"type": [
"number",
"null"
]
},
"distance_miles": {
"description": "Distance miles",
"type": [
"number",
"null"
]
},
"distance_nautical_miles": {
"description": "Distance nautical miles",
"type": [
"number",
"null"
]
},
"ellipsoid": {
"description": "Reference ellipsoid used for the calculation",
"type": "string"
},
"final_bearing_deg": {
"description": "Final bearing, in degrees",
"type": [
"number",
"null"
]
},
"from": {
"description": "Start of the range"
},
"haversine_km": {
"description": "Haversine, in kilometres",
"type": [
"number",
"null"
]
},
"initial_bearing_deg": {
"description": "Initial bearing, in degrees",
"type": [
"number",
"null"
]
},
"initial_compass": {
"description": "Initial compass",
"type": [
"string",
"null"
]
},
"method": {
"description": "Method used",
"type": "string"
},
"mode": {
"description": "Mode used",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"to": {
"description": "End of the range"
}
},
"required": [
"mode",
"distance_km"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-21T06:07:34.112Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-21T06:07:33.935Z"
},
"resource": "https://saylorinnovations.com/api/geo/geodesic",
"serviceName": "Saylor Innovations Data Desk",
"tags": [
"accurate distance between two",
"vincenty distance",
"initial bearing from a to b",
"destination point from bearing",
"geodesic vs great circle"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Accurate WGS-84 distance and bearings between two coordinates with Vincenty, or the destination point from a start, bearing and distance"
}What the leaf hashes
{"body":"a0b0562073ba783a0da6e028f33963c3b4a6d0e409b769b8134fce23de129752","id":119955,"kind":"listing","method":"baseline/1","observed_us":1793025616994388,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/geo/geodesic","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).
- 0xa2a2c0cf9ca74b06f141af7379e489548f6b7910a7d7b636037ed503645e9a64
- 0xcbd7bee60ae4e3f4f849372c7ef297ba9fb98bca2248e1f76aac4728ea9d2eb1
- 0xdb689833aa494f00835ff72784c6e4649d2ca532eff8171d9fa45c74c1b7452c
- 0xc84cdbe592ac0e4adc754331dadddd1c1d57448590a82cf10b81fac6d9f32060
- 0x1e1620356da3aa142e7cd10c43f285e9eed7f0eb9adc2c4d48368503b9d814a8
- 0xb34a25815f563a3e790cf515b4956d4c0631643772ab2ab092ae9104f09b7863
- 0xf7b06636328f0e567d26576a029c41de3bae9244529b0532c27dcd539589715c
- 0x265fff7f63e288d2a98547b517ee14082e2b2a991f7213d9355a58a080d1f310
- 0xd021a868420572ae3508b2bf2dc91b02dabed8374c3c32bd7305beb9b2cc7894
- 0xb3a29351e1b8013225f7601a802293835d75b405261ddeb88b2d8f50a6ded3ac
- 0xd2bc27d81a73a53b7c724da36f189ebdd2fef396490722c3ee66192b798d20d0
- 0x19537c574979327583a539261287714af2eee831125de819abab0f155acd3a75
- 0xc34c13c58ba9c342ea1b833ac1882a4aea22777c4fd1092b2f83d3bac6b9f845
- 0x428106f4ae4ec142f17aebf6fa50935242f8d3f1c211cf95d6351d03d11da2b7
- 0x62a900133713919f4eed33d8336876b7a6d538233b8a4f3ed03b29aa44f5bad0
- 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae