Evidence row 75287

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://finance.openverbs.com/v1/irr"
    ]
  ],
  "name": "Internal rate of return",
  "owner_address": "0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
        "scheme": "exact"
      }
    ],
    "description": "Internal rate of return (per period) of a series of cash flows, solved with a bounded bisection. Requires at least one positive and one negative flow; flows with no sign change or no bracketable root are rejected as a clean 400.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "cashflows": [
                -1000,
                1100
              ]
            },
            "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": {
                    "cashflows": {
                      "description": "Cash flows by period; index 0 is time 0. Needs mixed signs.",
                      "items": {
                        "type": "number"
                      },
                      "maxItems": 10000,
                      "minItems": 2,
                      "type": "array"
                    }
                  },
                  "required": [
                    "cashflows"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-08T05:39:18.787Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-08T05:39:18.517Z"
    },
    "resource": "https://finance.openverbs.com/v1/irr",
    "serviceName": "Internal rate of return",
    "tags": [
      "internal rate of return",
      "irr calculator",
      "cashflow return rate",
      "investment irr api",
      "solve discount rate"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Internal rate of return (per period) of a series of cash flows, solved with a bounded bisection. Requires at least one positive and one negative flow; flows with no sign change or no bracketable root are rejected as a clean 400."
}

What the leaf hashes

{"body":"3ae88ecaa57a7e64b319e6da1ae8994109cb47625e3684afc9b6d983186c307d","id":75287,"kind":"listing","method":"baseline/1","observed_us":1793025490300674,"prev":null,"subject":"x402_bazaar:https://finance.openverbs.com/v1/irr","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xe4ae8002e043f4bee9683b0cc685ff09c434d060ecd187404494340b51b3b03f
2. 0x9b3b0d8efff4838501d60fcc530ff6dc0a6db229d48efb99a9fb234bde669911
3. 0xfbf819379403606afc76f433357d33a21e917fce7219245dbd13f9ff0d1d43f0
4. 0xe5d84ccaa512d7974f4dfb8ab9b833e95906880279af8696e938ee53462a6a88
5. 0xf700afdb39c3dec020d8fbbb0363abb7799a87a4fb3c7456f86fd5cb595ae721
6. 0xf157be5c4cd242edf05c4529471fbcd9ac62e7e80f953ba942391e34d22e1d85
7. 0xdbd90b25986388d6d6b3c0841fab9404beb71a86ed65e8e7f596afbcddc9408c
8. 0x1058456db6e26487146924ad2b7ce065484fbaae1bfd327e211937d249c64754
9. 0xf74f0470949b1ad4e69af8b6fc272a2e62927750b38e88b6d8d884b99b022b4e
10. 0x86c56520a247c0dd1499f40b00669d0f980768d7f2c1c990aed4a43e7b31c44a
11. 0x162e0da99198c9cdc9c43bf4626e85f4a7092fdb31ea15c7126e1f98b20eaa56
12. 0x2fc38b57208d692aab1ee89b6e26917df292126314027c27360c5644a63fd0bc
13. 0xc0924a0807e534382f518663123231c317124338831a2b310de2c17b09677086
14. 0x9bc5fc98278b9f6dc18c66c6e162aefd5244be03170d41bc5161f58ad11beed7
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae