← The evidence ledger
Evidence row 2201938
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://electronics-calc.x402tookit.com/resistor-standard
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- d54d1a49379b4e73f78e70f4786d94ecfad6e4593e28e8560578e34deb6cf27b
- Leaf
- 0x50ebf50d5f644db70288955309b4bfbcd2698deb0fad5a1b02147d2bb21a14f8
What was observed
{
"endpoints": [
[
"x402",
"https://electronics-calc.x402tookit.com/resistor-standard"
]
],
"name": "Electronics 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": "Nearest standard E6, E12, E24, E48, E96 or E192 resistor values to a target, with the percent error of each neighbour.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"series": "E12",
"target": "4.3k"
},
"type": "http"
},
"output": {
"example": {
"above": 4700,
"asOf": "2026-10-11T08:33:13.043Z",
"below": 3900,
"closest": 3900,
"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.",
"errorPct": 9.30233,
"isStandard": false,
"notChecked": [
"tolerance matching: E12 parts are 10% typically, E24 5% and E96 1%",
"series availability for a given power rating or package",
"…1 more"
],
"otherSeries": [
{
"closest": 4700,
"errorPct": 9.302,
"series": "E6"
},
{
"closest": 4300,
"errorPct": 0,
"series": "E24"
}
],
"reasons": [
"E12 has 12 values per decade.",
"Tighter series (E48 and up) are 2% or better parts and cost more."
],
"series": "E12",
"source": "computed locally",
"summary": "4.3 kohm in E12: closest 3.9 kohm (9.3% off); below 3.9 kohm, above 4.7 kohm.",
"target": 4300,
"verdict": "NEAREST_FOUND"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
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"properties": {
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"queryParams": {
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"type": "string"
},
"target": {
"description": "Target resistance, e.g. 4.3k, 6800 or 2.2M",
"type": "string"
}
},
"required": [
"target"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
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"number"
]
},
"asOf": {
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"null",
"string"
]
},
"below": {
"type": [
"null",
"number"
]
},
"closest": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"errorPct": {
"type": [
"null",
"number"
]
},
"isStandard": {
"type": [
"boolean",
"null"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"otherSeries": {
"items": {
"properties": {
"closest": {
"type": [
"null",
"number"
]
},
"errorPct": {
"type": [
"null",
"number"
]
},
"series": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
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},
"type": [
"array",
"null"
]
},
"series": {
"type": [
"null",
"string"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"target": {
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"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-01T22:51:56.69Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-01T22:51:56.516Z"
},
"resource": "https://electronics-calc.x402tookit.com/resistor-standard",
"serviceName": "Electronics Calculators",
"tags": [
"electronics",
"resistor",
"e-series",
"standard-values"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Nearest standard E6, E12, E24, E48, E96 or E192 resistor values to a target, with the percent error of each neighbour."
}What the leaf hashes
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Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af