← The evidence ledger
Evidence row 2201230
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://publishing-calc.x402tookit.com/ebook-size
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- eb8884e00c7b378d095b2ad3873b842a3e68f8660ae7bc6ef9f9cd8749b73704
- Leaf
- 0xa0025142aa83d7e678e054a1754e714455956af8b0fd380fb9eecf8b3fab36b3
What was observed
{
"endpoints": [
[
"x402",
"https://publishing-calc.x402tookit.com/ebook-size"
]
],
"name": "Publishing 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": "Estimate ebook file size in KB and MB from word count, image count and average image size (all adjustable).",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"images": 10,
"words": 80000
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-12T01:40:24.885Z",
"bytesPerWordUsed": 6.5,
"compressedTextKb": 208,
"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.",
"imageSharePercent": 88.6,
"images": 10,
"imagesKb": 2000,
"notChecked": [
"the real file: embedded fonts, a high-resolution cover, tables and markup density can move this a lot",
"how your retailer recompresses images or charges for file size (delivery fees, if any, are retailer rules not covered here)",
"…1 more"
],
"overheadKb": 50,
"rawTextKb": 520,
"reasons": [
"Text is estimated as words x bytes per word, then compressed; images are assumed already compressed.",
"Images dominate the size, so image size is the lever to pull."
],
"source": "computed locally (size = words x bytes per word x compression + images x average image KB + fixed overhead)",
"summary": "About 2258 KB (2.26 MB): 208 KB text, 2000 KB images, 50 KB overhead.",
"textCompressionUsed": 0.4,
"totalKb": 2258,
"totalMb": 2.258,
"verdict": "ESTIMATE",
"words": 80000
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"avgImageKb": {
"description": "Average size of one embedded image in KB, 1 KB = 1000 bytes (default 200)",
"type": "number"
},
"bytesPerWord": {
"description": "Uncompressed text bytes per word incl. markup (default 6.5)",
"type": "number"
},
"images": {
"description": "Number of embedded images (default 0)",
"type": "integer"
},
"overheadKb": {
"description": "Fixed overhead in KB for stylesheet, metadata and navigation (default 50)",
"type": "number"
},
"textCompression": {
"description": "Zip size as a fraction of raw text, 0.1 to 1 (default 0.4)",
"type": "number"
},
"words": {
"description": "Word count of the book",
"type": "number"
}
},
"required": [
"words"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"bytesPerWordUsed": {
"type": [
"null",
"number"
]
},
"compressedTextKb": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"imageSharePercent": {
"type": [
"null",
"number"
]
},
"images": {
"type": [
"null",
"number"
]
},
"imagesKb": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"overheadKb": {
"type": [
"null",
"number"
]
},
"rawTextKb": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"textCompressionUsed": {
"type": [
"null",
"number"
]
},
"totalKb": {
"type": [
"null",
"number"
]
},
"totalMb": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"words": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:07:50.059Z",
"quality": {
"l30DaysTotalCalls": 3,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:07:49.817Z"
},
"resource": "https://publishing-calc.x402tookit.com/ebook-size",
"serviceName": "Publishing Calc",
"tags": [
"publishing",
"ebook",
"epub",
"file-size"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Estimate ebook file size in KB and MB from word count, image count and average image size (all adjustable)."
}What the leaf hashes
{"body":"eb8884e00c7b378d095b2ad3873b842a3e68f8660ae7bc6ef9f9cd8749b73704","id":2201230,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646801362720,"prev":null,"subject":"x402_bazaar:https://publishing-calc.x402tookit.com/ebook-size","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).
- 0xa002406840382a71b302fa368a56d5fd97797edf16c8752466f18d4283031e07
- 0x79b7268482fc40fc36e15c841ca1beef87ad19eeb69df6277368e9e74ca4684f
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- 0x731aed48e6ebaea0f0f1f25553e659f1a1914079500e9c2f2d1dfe746b9a61d9
- 0x276e2fa0c21c2220acec5005667f6b7cfa183a8daaf7f317e5077bc4c6e08db0
- 0x2ff7b1db58554b94f3d17b53c4f892ded109f497ad86eeaa0f83588921b759b1
- 0xdff61622855886d80ecda4fb808422c854d0801605b73184332cf83604a730ff
- 0x9c91ecb84461aa4cb2a891252746755d862a88fe9bad822700cdb99eaab2edca
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- 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af