← The evidence ledger
Evidence row 2201485
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://paper-print-calc.x402tookit.com/paper-fit
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 99d0ef8ae0b47500312dba7c34880df08c78524ee2f3f55d62cf9edb8569c4fb
- Leaf
- 0x81ff2ce5fe59085e12adb8b981508aecc1b42ccb08578e4175adcb71da4165e7
What was observed
{
"endpoints": [
[
"x402",
"https://paper-print-calc.x402tookit.com/paper-fit"
]
],
"name": "Paper & Print Calc",
"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": "How many cards, labels or small sheets fit on a large sheet in a grid, trying both rotations, with margin, gutter and waste.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"gutter": 0,
"margin": 0.25,
"pieceHeight": 2,
"pieceWidth": 3.5,
"sheetHeight": 11,
"sheetWidth": 8.5
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T01:48:14.674Z",
"columns": 4,
"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.",
"notChecked": [
"mixed-orientation layouts that can fit more",
"bleed and crop marks (add them to the piece size)",
"…1 more"
],
"piecesPerSheet": 12,
"reasons": [
"Upright layout: 10; rotated 90 degrees: 12."
],
"rotated": true,
"rotatedCount": 12,
"rows": 3,
"sheetArea": 93.5,
"sheetsFor1000Pieces": 84,
"sheetsFor100Pieces": 9,
"source": "computed locally (grid packing, both orientations)",
"summary": "12 piece(s) fit (4 x 3, rotated); 10.2% of the sheet is waste.",
"uprightCount": 10,
"usedArea": 84,
"utilizationPercent": 89.84,
"verdict": "COMPUTED",
"wastePercent": 10.16
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"gutter": {
"description": "Gap between pieces (default 0)",
"type": "number"
},
"margin": {
"description": "Unprintable margin on all four sides of the sheet (default 0)",
"type": "number"
},
"pieceHeight": {
"description": "Piece height",
"type": "number"
},
"pieceWidth": {
"description": "Piece width",
"type": "number"
},
"sheetHeight": {
"description": "Large sheet height",
"type": "number"
},
"sheetWidth": {
"description": "Large sheet width (any unit, same as the piece)",
"type": "number"
}
},
"required": [
"sheetWidth",
"sheetHeight",
"pieceWidth",
"pieceHeight"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"columns": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"piecesPerSheet": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"rotated": {
"type": [
"boolean",
"null"
]
},
"rotatedCount": {
"type": [
"null",
"number"
]
},
"rows": {
"type": [
"null",
"number"
]
},
"sheetArea": {
"type": [
"null",
"number"
]
},
"sheetsFor1000Pieces": {
"type": [
"null",
"number"
]
},
"sheetsFor100Pieces": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"uprightCount": {
"type": [
"null",
"number"
]
},
"usedArea": {
"type": [
"null",
"number"
]
},
"utilizationPercent": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"wastePercent": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T23:42:42.831Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T23:42:42.664Z"
},
"resource": "https://paper-print-calc.x402tookit.com/paper-fit",
"serviceName": "Paper & Print Calc",
"tags": [
"paper",
"imposition",
"cards",
"layout"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "How many cards, labels or small sheets fit on a large sheet in a grid, trying both rotations, with margin, gutter and waste."
}What the leaf hashes
{"body":"99d0ef8ae0b47500312dba7c34880df08c78524ee2f3f55d62cf9edb8569c4fb","id":2201485,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646805687415,"prev":null,"subject":"x402_bazaar:https://paper-print-calc.x402tookit.com/paper-fit","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).
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- 0xe5297ee6c44f22aac5fb5a7e781c47f45a9c79c28d62d8d4ffb9bdfd25d4ed25
- 0x8440aa7e729f38c29a4417465290fb2fe786ade08ff5d66134b2c86220786044
- 0xd31ec86cf73caa032ecf8e8595a204497c93cf40e024bcd4718739a4d16d143b
- 0xbc0bd3e916baba1bbca963c3d3f14a8bfcf52d7c533868a4ad4ba3233605e752
- 0x1fcc62b860f05e6d608e0f36cdd791fdbd0a6f06270969f306770f4a1d3eab15
- 0x3fd83e30473e926f4e4e16bd737d7c3c794bc8304da6d47a1d7ca29d12258f04
- 0xf82dc9b9d8e081f36e55e80fab45654768c11eb158257f63f8ca7ff17d181d54
- 0x5d40473873ebe898bcca4e49df524bf4345695f06abe3579f4bdb7b306b863f8
- 0x46991481c678139203ebc3c532867ce1643c09ddc33966c4fb48bb7f033ab22f
- 0x3b89dd05634a82075204d3c671f613081ddfd9df739c64c0a8f39081bdfa32c7
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- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af