← The evidence ledger
Evidence row 2202077
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://construction-calc.x402tookit.com/deck-calc
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f97dd567bfd6d8150ea69549a11b98c210d7cf6b9e2a1e6b9cc795598bb5d567
- Leaf
- 0x0f93da6c54401f2c6b179e82d11c2906fd18d0dc8e8e8f58c1456f03b1267189
What was observed
{
"endpoints": [
[
"x402",
"https://construction-calc.x402tookit.com/deck-calc"
]
],
"name": "Construction 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": "Decking boards, joist count and screws for a rectangular deck from its size, board width, gap, joist spacing and stock length.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"boardWidthIn": 5.5,
"gapIn": 0.125,
"joistSpacingIn": 16,
"lengthFt": 16,
"stockLengthFt": 16,
"widthFt": 12
},
"type": "http"
},
"output": {
"example": {
"areaSqFt": 192,
"asOf": "2026-10-11T14:25:12.645Z",
"boardLinearFt": 416,
"boardRows": 26,
"boardsPerRow": 1,
"boardsWithWaste": 29,
"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.",
"joistLengthFt": 12,
"joists": 13,
"notChecked": [
"structural design: joist size and span, beams, posts, footings and ledger connections need a span table or engineer and local permits",
"stairs, railings, picture-frame borders and diagonal layouts",
"…2 more"
],
"reasons": [
"Board rows = width / (board width + gap), rounded up; boards run along the length and across the joists.",
"1 board per row at 16 ft stock.",
"…1 more"
],
"screwsApprox": 710,
"source": "computed locally",
"stockLengthFt": 16,
"summary": "192 sq ft deck: 26 board rows, 29 boards of 16 ft (10% waste), 13 joists 12 ft long at 16 in centres, about 710 screws.",
"verdict": "ESTIMATE"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"boardWidthIn": {
"description": "Actual board width in inches, default 5.5 (5/4x6)",
"type": "number"
},
"gapIn": {
"description": "Gap between boards in inches, default 0.125",
"type": "number"
},
"joistSpacingIn": {
"description": "Joist spacing on centre in inches, default 16",
"type": "number"
},
"lengthFt": {
"description": "Deck length along the boards in feet (joists are spaced across this)",
"type": "number"
},
"stockLengthFt": {
"description": "Board length you buy in feet, default 16",
"type": "number"
},
"wastePct": {
"description": "Waste, default 10 (15 to 20 for diagonal)",
"type": "number"
},
"widthFt": {
"description": "Deck width in feet (the joist span)",
"type": "number"
}
},
"required": [
"lengthFt",
"widthFt"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"areaSqFt": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"boardLinearFt": {
"type": [
"null",
"number"
]
},
"boardRows": {
"type": [
"null",
"number"
]
},
"boardsPerRow": {
"type": [
"null",
"number"
]
},
"boardsWithWaste": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"joistLengthFt": {
"type": [
"null",
"number"
]
},
"joists": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"screwsApprox": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"stockLengthFt": {
"type": [
"null",
"number"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:43:45.298Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:43:45.133Z"
},
"resource": "https://construction-calc.x402tookit.com/deck-calc",
"serviceName": "Construction Calculators",
"tags": [
"deck",
"decking",
"joists",
"estimating"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Decking boards, joist count and screws for a rectangular deck from its size, board width, gap, joist spacing and stock length."
}What the leaf hashes
{"body":"f97dd567bfd6d8150ea69549a11b98c210d7cf6b9e2a1e6b9cc795598bb5d567","id":2202077,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646812411229,"prev":null,"subject":"x402_bazaar:https://construction-calc.x402tookit.com/deck-calc","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).
- 0x0f93f1396e6b71058b5c0bd411d47afda505e68721a90ce964021acda9401ca4
- 0xe45d48774fc82debcf14e8f455e63e657f0b0727bc4291b0f767414ae613c737
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- 0x681599c6be26501017666298799bcbb79899a14a7495fd9c9c2a136cf773944f
- 0x4854eed20c7a3745a48df9326872a2a247094a2e3e37917dce635c899584fb2c
- 0x1b8f817d778c9168ce0e4108048f7b6ba73023bce728a66fc1277158f36679d5
- 0x621ed13004245885eaef67baeab90d3fe34a0401ef1b0e637daf24e0f3a7e335
- 0x17ec669ed8e75a631a96425e19f266a146b8751ea2ca3a6d1c1cdde8f5f989ec
- 0x3ce1925e166200a1210d952731c9d81b5fdc45ff1ab033e1b62db608ff9741e6
- 0x8381fbb4eeae9294836900250afc6571b1212fc3e0bf451daa394bc0fad12b2a
- 0xef7191495c7f29d5ce00dd16adb078f6e44dfc2fc5e29ef3012e849c3389ea58
- 0x37c4ce84bc1fbced66397add5bebabce40461398a546a037487c5eeb7879648d
- 0xaed8243a14c659d2324c6748095467bfaec6927f1294091015e04180dda07dd7
- 0x9914dfe331775bd1714304f757d2b6b43ba45167245d645ce50f54a3d8617c4d
- 0xd82979c12a2aae44121bb6058b3364b3a3cbc9be411e35ab0208df5ed56f65d4
- 0x7cb861d18f06406535ade133f716d897f27d257cf0121f99d94c78c713c4b54d
- 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
- 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af