Evidence row 2201888

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://finance-calculators.x402tookit.com/npv-irr"
    ]
  ],
  "name": "Finance 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": "Net present value and internal rate of return (IRR) for a list of cash flows, with a clear accept/reject-at-rate verdict.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "discount_rate_pct": 10,
              "flows": "-1000,500,500,500"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T03:59:15.253Z",
              "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.",
              "discountRatePct": 10,
              "irrPct": 23.37519,
              "notChecked": [
                "taxes",
                "risk differences between cash flows",
                "…1 more"
              ],
              "npv": 243.426,
              "paybackPeriod": 2,
              "periods": 3,
              "reasons": [
                "The project earns more than the discount rate.",
                "A single sign change: the IRR is unique."
              ],
              "signChanges": 1,
              "source": "computed locally",
              "summary": "NPV at 10% is $243.43; IRR 23.375%.",
              "verdict": "NPV_POSITIVE"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "discount_rate_pct": {
                      "description": "Discount rate in percent, default 10",
                      "type": "number"
                    },
                    "flows": {
                      "description": "Comma-separated cash flows, first is period 0 (usually negative), up to 60",
                      "type": "string"
                    }
                  },
                  "required": [
                    "flows"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "discountRatePct": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "irrPct": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "npv": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "paybackPeriod": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "periods": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "signChanges": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:54:39.746Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:54:39.49Z"
    },
    "resource": "https://finance-calculators.x402tookit.com/npv-irr",
    "serviceName": "Finance Calculators",
    "tags": [
      "npv",
      "irr",
      "capital-budgeting"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Net present value and internal rate of return (IRR) for a list of cash flows, with a clear accept/reject-at-rate verdict."
}

What the leaf hashes

{"body":"79b8e20a68ec901ffe2e8b93cdc7f81e6b388700e093287a93ceaadb28e205ff","id":2201888,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810053988,"prev":null,"subject":"x402_bazaar:https://finance-calculators.x402tookit.com/npv-irr","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0xe6c004a0a371cd2ba8c72279251a3d0be634a52a56e874234f409b8a652847a6
2. 0xfd229150d4a355c025acddbc93dbcaec6b8d62f0293b83919287743343614893
3. 0x58b756b457f50f65f423feb18dd817aa0e0cbc8cbf494a26904b53b709998bfd
4. 0xf0899296f61479b9093f90074c6a76d79d96f7f729369d53c658f68645aeaeec
5. 0x38383f4f4166eb4698af3987c738feead0acac0801895cbb6580a5b3e4f4d0e6
6. 0x6bdb30ea602fdffc324a1bc5946cb3c3807b6cbebcf30fccff8a5f80ac8c108e
7. 0x6583cfd8d8be564a7e2db41ab25b8eb0cc71130026feacaa5da181e93bfeba22
8. 0x0363c9ee170bd76636f4e69e476a1d7ca21fdc2dd172847c5b58898f4899843c
9. 0x227fc3f9b2d5127ef29bb8c5eefdee285b7a00f471b1b22bc5653ba3e7d3467d
10. 0x0da0b15902e7376098bb2373609e5d02ff796545fa6231b62566d756e5e67d8e
11. 0x967fad4d9664aa895226cb5b718f3c653b043f55d5a2e67a86a97f4ea70b7466
12. 0x6e5a50bc795c5cacf8d07a6a7782267c29257d38dd1b857933910a4cfb7ea84f
13. 0x699db14025d495a48d39671ab634de3d8cbdf71cc080884a285592176d87ef84
14. 0x3e441d3f53c7b69d6c73ef93d327dfc3071a522c550856540832b34fcb531738
15. 0xd643f764eee39146411d4bff8903a327f4f8f55616e14e57281a245206d6ed2b
16. 0x6dd7e4db65395e8670c7c2747d44fec79e03305934ef4746bf5dbca04ec6ec49
17. 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
18. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af