Evidence row 2201937

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://electronics-calc.x402tookit.com/voltage-divider"
    ]
  ],
  "name": "Electronics 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": "Resistor voltage divider: output voltage, current and power from R1 and R2, or the R2 needed for a target output.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "r1": "10k",
              "r2": "10k",
              "vin": 5
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T08:33:13.303Z",
              "currentA": 0.00025,
              "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.",
              "notChecked": [
                "loading: a connected load changes the output (keep the load at least 10 times R2)",
                "resistor tolerance (5% parts shift the output by about 2.5%)",
                "…1 more"
              ],
              "r1": 10000,
              "r1PowerW": 0.000625,
              "r2": 10000,
              "r2PowerW": 0.000625,
              "ratio": 0.5,
              "reasons": [
                "Vout = Vin x R2 / (R1 + R2). The divider draws constant current: use larger resistors for battery circuits.",
                "A load on the output in parallel with R2 lowers Vout."
              ],
              "source": "computed locally",
              "standardValue": null,
              "summary": "10 kohm over 10 kohm from 5 V gives 2.5 V (250 uA flowing, 1.25 mW total).",
              "totalPowerW": 0.00125,
              "verdict": "COMPUTED",
              "vin": 5,
              "vout": 2.5
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "r1": {
                      "description": "R1 in ohms, e.g. 10k",
                      "type": "string"
                    },
                    "r2": {
                      "description": "R2 in ohms (to find Vout)",
                      "type": "string"
                    },
                    "vin": {
                      "description": "Input volts",
                      "type": "number"
                    },
                    "vout": {
                      "description": "Target output volts (to find R2)",
                      "type": "number"
                    }
                  },
                  "required": [
                    "vin",
                    "r1"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "currentA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "r1": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "r1PowerW": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "r2": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "r2PowerW": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "ratio": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "standardValue": {},
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "totalPowerW": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "vin": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "vout": {
                      "type": [
                        "null",
                        "number"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:51:59.754Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:51:59.569Z"
    },
    "resource": "https://electronics-calc.x402tookit.com/voltage-divider",
    "serviceName": "Electronics Calculators",
    "tags": [
      "electronics",
      "voltage-divider",
      "resistor"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Resistor voltage divider: output voltage, current and power from R1 and R2, or the R2 needed for a target output."
}

What the leaf hashes

{"body":"6d8604e1f42fc0b549c44e3a8bef5927c3b957341181a5d05ef53a5e6c59506b","id":2201937,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810270153,"prev":null,"subject":"x402_bazaar:https://electronics-calc.x402tookit.com/voltage-divider","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. 0xbdec2e3e2a447037ddcc6b1d59f9da486c85cd64c1c9964acff2ac2ca2e4b6a5
2. 0xfccf9ae62376c76c3556ec7c26002fe5d28573748e9f3adec7662b35a4dfd18b
3. 0x999bfe88c44aaf55a720c891322f70e620d9ea13ece068af65f2e8c6cf5d5d58
4. 0xe14cfa35de95bf4b3a1143cfda96700fc4ca66bf197c56f3c27219d60f10ae68
5. 0x0a1d3f5a5e2a7c00bd21dc245ec63deb4bf667dd55eeeea69300fc8eb4db0ca6
6. 0x9ad71cea24ebe6d2c7b5f3c5ace6966825bb604032df273a7f9e8e89ce7406ae
7. 0xb099e3a8c16e286a5bca43f6bc16b048be3d71f559505b2b6c14a87c679703ff
8. 0x2e3cde73501aed8c0fe4fec8b72110cece9e3b224a485647bb22018fbd845370
9. 0xdd855bec1fb2ea5ba667139d9e8973458c855dcae5327bfca19f728bbdcdc60d
10. 0x7172f657adfa93a5da306b7a15cff115d94031ee98ccfe989e9b6615c61ebd3a
11. 0x45a88609b1772c3cb97cb7ed88c34db9470c6594ecc449b1e957d45880e1fc64
12. 0x7ab1afbc5dff2f15cd9d70287be5427947cfc03841ccd326471dc4eef08bb4c6
13. 0x047210a388d428d19c536816e7de36503493563ebf77985dcdc7335f49f50a17
14. 0x5483702efe692d367a569024f6ed01075bb22b39176302aa223f423906e01c1e
15. 0xcbfaf790331071a9b3499a4db6f9d951fe5d04baefda2c66846b52b023ab8ae5
16. 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
17. 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af