Evidence row 2201943

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://electronics-calc.x402tookit.com/ne555-timer"
    ]
  ],
  "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": "555 timer calculator: astable frequency, period and duty cycle from R1, R2 and C, or monostable pulse width from R and C.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "c": "1u",
              "mode": "astable",
              "r1": "1k",
              "r2": "10k"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T08:33:11.726Z",
              "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.",
              "dutyCyclePct": 52.381,
              "formatted": {
                "frequency": "68.57 Hz",
                "period": "14.58 ms"
              },
              "frequencyHz": 68.571429,
              "highTimeS": 0.007623,
              "lowTimeS": 0.00693,
              "notChecked": [
                "CMOS versus bipolar 555 differences and supply voltage effects",
                "real component tolerance and capacitor leakage",
                "…1 more"
              ],
              "periodS": 0.014583333,
              "reasons": [
                "f = 1.44 / ((R1 + 2 R2) C); duty = (R1 + R2) / (R1 + 2 R2), always above 50% in the basic circuit.",
                "Use R1 much smaller than R2 to approach a 50% duty cycle."
              ],
              "source": "computed locally",
              "summary": "68.57 Hz (period 14.58 ms), duty cycle 52.38%: high 7.623 ms, low 6.93 ms.",
              "verdict": "ASTABLE"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "c": {
                      "description": "Timing capacitor in farads, e.g. 10u",
                      "type": "string"
                    },
                    "mode": {
                      "description": "astable or monostable",
                      "type": "string"
                    },
                    "r1": {
                      "description": "R1 ohms (astable) or R (monostable)",
                      "type": "string"
                    },
                    "r2": {
                      "description": "R2 ohms (astable only)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "mode",
                    "c"
                  ],
                  "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"
                      ]
                    },
                    "dutyCyclePct": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "formatted": {
                      "properties": {
                        "frequency": {
                          "type": [
                            "null",
                            "string"
                          ]
                        },
                        "period": {
                          "type": [
                            "null",
                            "string"
                          ]
                        }
                      },
                      "type": [
                        "null",
                        "object"
                      ]
                    },
                    "frequencyHz": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "highTimeS": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "lowTimeS": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "periodS": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "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": "2026-11-01T22:51:41.421Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:51:41.154Z"
    },
    "resource": "https://electronics-calc.x402tookit.com/ne555-timer",
    "serviceName": "Electronics Calculators",
    "tags": [
      "electronics",
      "555",
      "timer",
      "oscillator"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "555 timer calculator: astable frequency, period and duty cycle from R1, R2 and C, or monostable pulse width from R and C."
}

What the leaf hashes

{"body":"23f790ac1b64514523a1eed4885c6a917550c2a7e7203049835db5611649440b","id":2201943,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810953810,"prev":null,"subject":"x402_bazaar:https://electronics-calc.x402tookit.com/ne555-timer","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. 0x80bfcfe0c585802bcc75bcabb52b4367942558ebce4ad1aad7690441488a5447
2. 0x291dc0851baa34ed860bff921e75f109e4f117c9dd1ac11fe7e2c4ee34fc7368
3. 0x0c38163464d187af96493d12e995f668a533b765df8cef84295efc72f5b13158
4. 0x87c43fe094ce4f9fe7631a94ea292dfa823b0d2fff2ba476d4f15a19b68fb421
5. 0x6a6d03e7a21f8c465a9022bcd6c61d5ec7e5a21987f64e0dd99ba76294734643
6. 0xebe3df9ed25afdd5d0978e7cf6e53459ac75da07596c2354b100060a9f2411c0
7. 0x902bee3ac01c16eb625c2fce11262a2a2c7f3303dbc5e4321837893d343dc302
8. 0x7aa880cc4711fb4a360fba731443c1c392ae55003f5eae8ca87c795790181bd4
9. 0x8190b91db46208d9cb20e08acca28ced31c82cb405f9ad7e8d2877d99965e44c
10. 0x1b686ad2726c2dfca6ab72dcde8059f664e70fe286c97566ec957b4c1ca99944
11. 0xa393a68b746e025d8daf0e0981f2bc113caa7b5c6efc416b4f3c74cc574d5369
12. 0x71305c272656503414016b5f13ff8cba828a7f92b6aa86f744081781398d24d1
13. 0x6a06852e71057f53bcc6c658511dcfcda03ac93f8dd86e79a4db42c8e85677b9
14. 0x5d40473873ebe898bcca4e49df524bf4345695f06abe3579f4bdb7b306b863f8
15. 0x46991481c678139203ebc3c532867ce1643c09ddc33966c4fb48bb7f033ab22f
16. 0x3b89dd05634a82075204d3c671f613081ddfd9df739c64c0a8f39081bdfa32c7
17. 0x1805ef693fbdb2c23fcb61616f830408ca89bec1dc5b68ee47a770ffc0b9760a
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af