← The evidence ledger
Evidence row 2201342
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://barcode-qr.x402tookit.com/vcard-qr-payload
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- c913807445ee8321b165dcd03d40d35431b2af5c5fab4d772cda4196986b0ebd
- Leaf
- 0x537e6c8b71c337cba706527197ec093b12000c9382faa9cb383473539d809e7c
What was observed
{
"endpoints": [
[
"x402",
"https://barcode-qr.x402tookit.com/vcard-qr-payload"
]
],
"name": "Barcodes and QR Codes",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "30000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "30000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Build a vCard 3.0 contact card (RFC 2426 escaping of ; , \\ and newlines) and its QR code SVG.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"email": "jane@example.com",
"fn": "Jane Example",
"org": "Example Co",
"phone": "+1 555 0100"
},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-10-21T00:45:42.231Z",
"characters": 152,
"dataCodewords": 154,
"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.",
"ecLevel": "M",
"encodedUnits": 152,
"errorCorrectionCodewords": 88,
"maskPattern": 6,
"mode": "byte",
"modules": 49,
"notChecked": [
"that the phone, email or URL are real or correctly formatted",
"RFC 2426 75-octet line folding (lines are not folded; scanners accept long lines)",
"…1 more"
],
"payload": "BEGIN:VCARD\r\nVERSION:3.0\r\nN:Example;Jane;;;\r\nFN:Jane Example\r\nORG:Example Co\r\nTEL;TYPE=CELL:+1 555 0100\r\nEMAIL;TYPE=INTERNET:jane@example.com\r\nEND:VCARD",
"penaltyScore": 1643,
"quietZoneModules": 4,
"reasons": [
"Lines are separated by CRLF as RFC 2426 requires; ; , \\ and newlines inside values are escaped."
],
"source": "computed locally",
"summary": "vCard 3.0 for \"Jane Example\" (5 fields) and a version 8 QR code.",
"svg": "<svg xmlns=\"http://www.w3.org/2000/svg\" viewBox=\"0 0 57 57\" shape-rendering=\"crispEdges\"><rect width=\"57\" height=\"57\" fill=\"#ffffff\"/><path fill=\"#000000\" d=\"M4 4h7v1h-7zM12 4h5v1h-5zM21 4h1v1h-1zM23 …",
"svgBytes": 8512,
"verdict": "BUILT",
"version": 8
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"border": {
"description": "QR quiet zone in modules, 0 to 10 (default 4)",
"type": "integer"
},
"city": {
"description": "City",
"type": "string"
},
"country": {
"description": "Country",
"type": "string"
},
"ec": {
"description": "QR error correction L, M, Q or H (default M)",
"type": "string"
},
"email": {
"description": "Email address",
"type": "string"
},
"family": {
"description": "Family name (derived from fn if omitted)",
"type": "string"
},
"fn": {
"description": "Full display name, e.g. Jane Example",
"type": "string"
},
"given": {
"description": "Given name (derived from fn if omitted)",
"type": "string"
},
"note": {
"description": "Free-text note (up to 200 characters)",
"type": "string"
},
"org": {
"description": "Organisation",
"type": "string"
},
"phone": {
"description": "Phone number",
"type": "string"
},
"postal": {
"description": "Postal code",
"type": "string"
},
"region": {
"description": "State or region",
"type": "string"
},
"scale": {
"description": "Pixels per module, 1 to 20 (default 0: scalable)",
"type": "integer"
},
"street": {
"description": "Street address",
"type": "string"
},
"title": {
"description": "Job title",
"type": "string"
},
"url": {
"description": "Web address",
"type": "string"
}
},
"required": [
"fn"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"asOf": {
"type": [
"null",
"string"
]
},
"characters": {
"type": [
"null",
"number"
]
},
"dataCodewords": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"ecLevel": {
"type": [
"null",
"string"
]
},
"encodedUnits": {
"type": [
"null",
"number"
]
},
"errorCorrectionCodewords": {
"type": [
"null",
"number"
]
},
"maskPattern": {
"type": [
"null",
"number"
]
},
"mode": {
"type": [
"null",
"string"
]
},
"modules": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"payload": {
"type": [
"null",
"string"
]
},
"penaltyScore": {
"type": [
"null",
"number"
]
},
"quietZoneModules": {
"type": [
"null",
"number"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"svg": {
"type": [
"null",
"string"
]
},
"svgBytes": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
},
"version": {
"type": [
"null",
"number"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:05:26.993Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-11-02T04:05:26.797Z"
},
"resource": "https://barcode-qr.x402tookit.com/vcard-qr-payload",
"serviceName": "Barcodes and QR Codes",
"tags": [
"vcard",
"qr",
"contact",
"payload"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Build a vCard 3.0 contact card (RFC 2426 escaping of ; , \\ and newlines) and its QR code SVG."
}What the leaf hashes
{"body":"c913807445ee8321b165dcd03d40d35431b2af5c5fab4d772cda4196986b0ebd","id":2201342,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646804583023,"prev":null,"subject":"x402_bazaar:https://barcode-qr.x402tookit.com/vcard-qr-payload","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).
- 0x537df47adfdf7c002ae4bdde59f4e12543c001e587a867239c40b2e168d5251c
- 0x4732e929f42f870d5fe01f04287a70f442d497d915ad5079ef15bd2109a35d34
- 0xf44e397eb5b87d75b2b869e1d078c5f20b4353f9a0b14a376e2e08350d391c6b
- 0x7e81ec69eb805b86d78fdc449e47921752fe0abf0af4fcf2366ab1e2527b55d4
- 0x0bedb55626e9993cd3bd36e66b527e1bd5af2b82fef94f86ef17a63ce94f812c
- 0x679b0b1833ab93590e7540e149f3758018b38617da3c55bfa341b089db019d94
- 0xe55c1f4780801b3eb0aaa5057cc1d534b3dbf4d832d553ff8ea3f16236eed059
- 0xb68dfc492b5f9a3c3287289d10f5afa3625bf9a52dcc944922bcec5b3c968676
- 0xf3b45b0761125ce4298c52575d9ced005e734c21797a52c71bda68301bda4923
- 0x1b06b6bb904da35bb20a98cc337e6f6f1b7849933153c9d273a4e0d0a1728517
- 0xe86129f34106e46ab2a3a4266a79c8d3f2f77e5d556cf49b9ac214800195e0c4
- 0x72adf61d2802939b48d74a549823053f636277c76140db963cda7bbd192a3539
- 0x1af6bd9d49aa04d9f41d673388facaaa9e6daacb0aa9aad0dcf31353556f6ee6
- 0xa96ecfe7ab9f1788120ca262a1b69b7b258160df41b4041d36fcd211c95d26d9
- 0x67c99d356de30f9cfab88af48fbaa18909ef230dd09947e84da060bc03aca929
- 0x1068659ec8f2bcf26e4ad39786557a8c45d60e5ebba4fce2fb9962b2c9c59920
- 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
- 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
- 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af