← The evidence ledger
Evidence row 2202141
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://calendar-systems.x402tookit.com/persian-calendar
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 38743043cae60d406d215b110e135d77b668b307dd045c87412b9c207926d4e4
- Leaf
- 0xde13296ee9047b93773b687711c18fc22dc7119841c93a7021d6c5246922accf
What was observed
{
"endpoints": [
[
"x402",
"https://calendar-systems.x402tookit.com/persian-calendar"
]
],
"name": "Calendar Systems",
"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": "Convert a Gregorian date to the Persian Solar Hijri calendar (or back) using the astronomical Nowruz rule, 1901-2100.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"date": "2025-03-21"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-11T08:54:34.685Z",
"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.",
"from": "gregorian",
"gregorian": {
"day": 21,
"iso": "2025-03-21",
"month": 3,
"weekday": "Friday",
"year": 2025
},
"notChecked": [
"years outside Gregorian 1901 to 2100",
"the 33-year arithmetic rule used by some software, which differs from the astronomical rule in some years",
"…1 more"
],
"persian": {
"day": 1,
"input": "1404-01-01",
"leapYear": false,
"month": 1,
"monthLengthDays": 31,
"monthName": "Farvardin",
"nextNowruzGregorian": "2026-03-21",
"nowruzGregorian": "2025-03-21",
"text": "1 Farvardin 1404 AP",
"year": 1404,
"yearLengthDays": 365
},
"reasons": [
"Astronomical rule: 1 Farvardin is the day whose noon (Tehran, UTC+3:30) falls on or after the March equinox; months 1-6 have 31 days, 7-11 have 30, Esfand has 29 or 30.",
"Equinox times are good to about one minute, so a year is only uncertain if the equinox is within a minute or so of Tehran noon."
],
"source": "Meeus equinox (Astronomical Algorithms ch. 27) with the Iranian noon-in-Tehran rule, computed locally",
"summary": "2025-03-21 (Friday) is 1 Farvardin 1404 AP in the Persian (Solar Hijri) calendar.",
"supported": true,
"verdict": "CONVERTED",
"weekday": "Friday"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"date": {
"description": "YYYY-MM-DD, in the Gregorian calendar (default) or in the persian calendar when from=persian",
"type": "string"
},
"from": {
"description": "gregorian (default) or persian: which calendar the date is written in",
"enum": [
"gregorian",
"persian"
],
"type": "string"
}
},
"required": [
"date"
],
"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"
]
},
"from": {
"type": [
"null",
"string"
]
},
"gregorian": {
"properties": {
"day": {
"type": [
"null",
"number"
]
},
"iso": {
"type": [
"null",
"string"
]
},
"month": {
"type": [
"null",
"number"
]
},
"weekday": {
"type": [
"null",
"string"
]
},
"year": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"persian": {
"properties": {
"day": {
"type": [
"null",
"number"
]
},
"input": {
"type": [
"null",
"string"
]
},
"leapYear": {
"type": [
"boolean",
"null"
]
},
"month": {
"type": [
"null",
"number"
]
},
"monthLengthDays": {
"type": [
"null",
"number"
]
},
"monthName": {
"type": [
"null",
"string"
]
},
"nextNowruzGregorian": {
"type": [
"null",
"string"
]
},
"nowruzGregorian": {
"type": [
"null",
"string"
]
},
"text": {
"type": [
"null",
"string"
]
},
"year": {
"type": [
"null",
"number"
]
},
"yearLengthDays": {
"type": [
"null",
"number"
]
}
},
"type": [
"null",
"object"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"supported": {
"type": [
"boolean",
"null"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"weekday": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:40:35.418Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:40:35.239Z"
},
"resource": "https://calendar-systems.x402tookit.com/persian-calendar",
"serviceName": "Calendar Systems",
"tags": [
"persian-calendar",
"solar-hijri",
"calendar",
"dates"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Convert a Gregorian date to the Persian Solar Hijri calendar (or back) using the astronomical Nowruz rule, 1901-2100."
}What the leaf hashes
{"body":"38743043cae60d406d215b110e135d77b668b307dd045c87412b9c207926d4e4","id":2202141,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646813473876,"prev":null,"subject":"x402_bazaar:https://calendar-systems.x402tookit.com/persian-calendar","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
- 0xde13660970ad30318c9b32348182803cd608f060d4aa68ce1f2e6b2ba7fcdac5
- 0xfdc6cbea88899c50e39cda8c539900cd472f83de062277e60c5e6abb3a5b1061
- 0x0da81471d9c7a6d5d4dfebee5c5cb582389ec3ca4fd55818c35f9b9a3c2570d8
- 0x8084fba8b021de515af08f55d5f43ca72003ede9fbfb0f8f3485fab165ddb06c
- 0x12c9f4fad9c8afba4d3a03d66b1e5c71ef024bd97ae89b43d0fb50e8a6f8fb8d
- 0xf02709dd1d38c294200dadd19276385d577e3f7c6c8e8d42c2227f94be81ee68
- 0x95fb2e7b22b9da821b805d1ee249e5bfbce383674672b7bc76875e328bf3f8df
- 0xbd10a3bad6c94c9359557256e23ab7891c44cfdb0b382ce50d59d10f2adb01f5
- 0xc4b15bad3159372da163a7f89d20abc6cf34fd8c1df22eff58e4a24288346f48
- 0xb486b7242b59299b703198b7029b5a8ebf9af06b65423ab8aae3db851b410f3f
- 0x64066a87d23b3b4e5862655618cc22fc931ef85ed07c75de281dea2f3a378d38
- 0x933c861a9715acc355546ac1de965c0ed1155480f615b2e5e8679f2112c69496
- 0x1cd421f1e0b0be98fab8392181e25435047bd7c44fcbda07fa5cd27615d6b674
- 0x5dd75981e1af83dc5ec1e2b8a2959012484cc3ea2e0defded2187a5a93ba7236
- 0xa370e8e015a32408a8112e54e5f40a8a65e871bd52bbc6f25fbd1139f2ba5b11
- 0x7ddefa7d79e7640c3fed21ee4472689415182c41a0258ab04a81d60495f4c40a
- 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
- 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af