← The evidence ledger
Evidence row 76149
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://handel.halowerk.com/v1/price/articles/percentage-drop
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 3762996b18fc6da5af6ef111c7a9ac487afec7423fd49369384d7df93d1444ed
- Leaf
- 0xabb8992f9fd70ed2cad4da29c91e1c01430b88b073c461fcefa3598606211f2a
What was observed
{
"endpoints": [
[
"x402",
"https://handel.halowerk.com/v1/price/articles/percentage-drop"
]
],
"name": "handel.halowerk.com/v1/price/articles/percentage-drop",
"owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
"raw": {
"accepts": [
{
"amount": "7000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"asset": "USDC",
"assetTransferMethod": "eip3009",
"eip712Domain": {
"chainId": 8453,
"name": "USD Coin",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"version": "2"
},
"name": "USD Coin",
"network_name": "Base Mainnet",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"scheme": "exact"
}
],
"description": "Notify when a listed-price reduction reaches a chosen percentage; previous price must be positive. Uses an optional predicate extension of the proven Price-Callback motor. price_percentage_drop_decision records this exact rule; the rule executes BEFORE dispatch. Same public IPv4HTTPS pinned connections, robots checks,9s,1MiBHTML,at-most-once receipt/idempotency7days,failureschargedfalse. Caller supplies historical price and schedules polling.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"callback_url": "https://stack.halowerk.com/_top10-endspurt/callback",
"drop_percent": 1,
"idempotency_key": "example_replace_with_random_32_character_key",
"previous": {
"currency": "GBP",
"value": 60
},
"url": "https://books.toscrape.com/catalogue/a-light-in-the-attic_1000/index.html"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"callback_url": {
"maxLength": 2048,
"type": "string"
},
"drop_percent": {
"exclusiveMinimum": 0,
"maximum": 100,
"type": "number"
},
"idempotency_key": {
"maxLength": 128,
"minLength": 32,
"pattern": "^[A-Za-z0-9_-]+$",
"type": "string"
},
"previous": {
"additionalProperties": false,
"properties": {
"currency": {
"pattern": "^[A-Z]{3}$",
"type": "string"
},
"value": {
"maximum": 1000000000,
"minimum": 0,
"type": "number"
}
},
"required": [
"value",
"currency"
],
"type": "object"
},
"url": {
"maxLength": 2048,
"type": "string"
}
},
"required": [
"url",
"previous",
"callback_url",
"idempotency_key",
"drop_percent"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"additionalProperties": false,
"properties": {
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-09T08:12:19.786Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-09T08:12:19.364Z"
},
"resource": "https://handel.halowerk.com/v1/price/articles/percentage-drop",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Notify when a listed-price reduction reaches a chosen percentage; previous price must be positive. Uses an optional predicate extension of the proven Price-Callback motor. price_percentage_drop_decision records this exact rule; the rule executes BEFORE dispatch. Same public IPv4HTTPS pinned connections, robots checks,9s,1MiBHTML,at-most-once receipt/idempotency7days,failureschargedfalse. Caller supplies historical price and schedules polling."
}What the leaf hashes
{"body":"3762996b18fc6da5af6ef111c7a9ac487afec7423fd49369384d7df93d1444ed","id":76149,"kind":"listing","method":"baseline/1","observed_us":1793025491714200,"prev":null,"subject":"x402_bazaar:https://handel.halowerk.com/v1/price/articles/percentage-drop","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).
- 0xabb8e054bd1293b966ce069f622e785376976337c9270d8fa368016760879e89
- 0x15be0f5d74d118270753a3fed01e2d3a8c86b2aefcdaedef9235270e059c714f
- 0x4556027d734455aa265f5df85e7282dd51625cbfb64a89d5d3d139fa615ab973
- 0x09df88e2533499aee00307448609f56a03b9c50a24b9aae12aa62a470c57b26e
- 0xfab3981e6346056ed940d92ed471ef1cca4c805dce078868c5b001641496a4c8
- 0x2f349bcd2d8091a66eb871b8ee952ecdbe44c26558cbe90efd8e60177839a486
- 0x51ffdeed804d2bdb45c0beb8d0bb3793230628490199e0818aa08cb8b0798ff3
- 0xbcc21a86fe9654e2d8a572aaebc227e581240dfe71fa65a176927de79a1e9f29
- 0xa4f59800b0bebd4b878392131b9045ba6400f102985af38c318245edfedadec3
- 0xc7cacc2d01c3e1b7ffb7608f2b307b4082bdded2ad2fc7c4373e088c0cadb4c9
- 0xe285855b14529e4bf6d93d3ce05a3365dcfc651d48b9dfeb5c229a51822613eb
- 0xb7fae69bb7bd717d54a83df961404a3e4de2a5cfbcfa013fd83a38627fe13f7e
- 0x4700d6dfdb40e52e2ceb8ffe62c75f3f708d23452f828255fd003d795f5d9d66
- 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
- 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
- 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
- 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae