← The evidence ledger
Evidence row 118787
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://prop.halowerk.com/v1/materials-lca
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- 30bd9c9ae5e45f63f7e56badbdd0f00725c38a58e0352aacb9b0a3cfbedbdcad
- Leaf
- 0x058afbdefad6fa014e219059ed8fda7d7a094574c0330017ba247ce59ebb4cfc
What was observed
{
"endpoints": [
[
"x402",
"https://prop.halowerk.com/v1/materials-lca"
]
],
"name": "prop.halowerk.com/v1/materials-lca",
"owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
"raw": {
"accepts": [
{
"amount": "3000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"currency": "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",
"recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
"scheme": "exact"
}
],
"description": "Multiplies installed quantities by supplied waste-adjusted production factors and adds tonne-kilometre transport factors. It reports a transparent partial embodied-carbon inventory only; it does not supply verified EPD data, include use/end-of-life stages unless represented by inputs, compare functional equivalence or constitute a certified life-cycle assessment.",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"materials": [
{
"installed_mass_kg": 480000,
"material_id": "concrete-c30",
"production_factor_kgco2e_per_kg": 0.12,
"transport_distance_km": 45,
"transport_factor_kgco2e_per_tonne_km": 0.09,
"waste_fraction": 0.04
},
{
"installed_mass_kg": 28000,
"material_id": "rebar",
"production_factor_kgco2e_per_kg": 0.78,
"transport_distance_km": 220,
"transport_factor_kgco2e_per_tonne_km": 0.08,
"waste_fraction": 0.03
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"materials": {
"items": {
"additionalProperties": false,
"properties": {
"installed_mass_kg": {
"maximum": 1000000000000000,
"minimum": 0,
"type": "number"
},
"material_id": {
"maxLength": 128,
"minLength": 1,
"type": "string"
},
"production_factor_kgco2e_per_kg": {
"maximum": 1000000,
"minimum": -1000000,
"type": "number"
},
"transport_distance_km": {
"maximum": 10000000,
"minimum": 0,
"type": "number"
},
"transport_factor_kgco2e_per_tonne_km": {
"maximum": 1000000,
"minimum": 0,
"type": "number"
},
"waste_fraction": {
"maximum": 0.99,
"minimum": 0,
"type": "number"
}
},
"required": [
"material_id",
"installed_mass_kg",
"waste_fraction",
"production_factor_kgco2e_per_kg",
"transport_distance_km",
"transport_factor_kgco2e_per_tonne_km"
],
"type": "object"
},
"maxItems": 10000,
"minItems": 1,
"type": "array"
}
},
"required": [
"materials"
],
"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"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-08T06:12:37.469Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-08T06:12:37.264Z"
},
"resource": "https://prop.halowerk.com/v1/materials-lca",
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Multiplies installed quantities by supplied waste-adjusted production factors and adds tonne-kilometre transport factors. It reports a transparent partial embodied-carbon inventory only; it does not supply verified EPD data, include use/end-of-life stages unless represented by inputs, compare functional equivalence or constitute a certified life-cycle assessment."
}What the leaf hashes
{"body":"30bd9c9ae5e45f63f7e56badbdd0f00725c38a58e0352aacb9b0a3cfbedbdcad","id":118787,"kind":"listing","method":"baseline/1","observed_us":1793025613715050,"prev":null,"subject":"x402_bazaar:https://prop.halowerk.com/v1/materials-lca","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).
- 0x058a89c2193d1953ca1afffc5acde677acd4fd2277a46d2a317568ca58bf6c0a
- 0x8ab0525805e42c2f0b897b11a9d797c26da1696ad1d5d8f18a380e1ef4e1a7ae
- 0x086189ea14db76354a41831cf6a780ea8896504da450775b3128ba74ab993039
- 0x2fbea95e2e2d54bbfa4471116b72060b6fe8189abab01095225327241078db03
- 0x73c5a6269e0efeda93dcebf7d744c2d8adc38fbbb30b9ac441beedabd2748f05
- 0x274a87023622bb5c6d4a0ae493a740e83d792f142bc1257b2cbc81fcc40e4090
- 0x640fe5f34b6964fe2153e66de19413f74c851f8daf9f7ead2208e41379bfd588
- 0xb3848dc3ee99873dec25f97a607d5d6e6bf425c320a45fd1cd3cabf2f9ac3a63
- 0x722fbb07d5dbdec6b342192af17963d74b052eb7d6398822992a7843a87d580e
- 0x29a79a1e444b726bf2db966f6ad9d0448d93ae7b7180fd783a410b336c52af9b
- 0x88fb9d02ea6ed7254b70cfe02388b31c183a7a709aad6303948d66f85ad516b1
- 0x7910a200eb458bec3c3badb3b2ead3e75cec5f3ba263800cea6b9f32efb53f25
- 0x610fdf3e989af0a6b4a400a3a8aab9156d757f8c96efe4e9d0594dfd04de1cc0
- 0xd1d3499072edb10edc68f84bcae2365d2ab534df689250cab18c751b6f13b6ff
- 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
- 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
- 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
- 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae