Evidence row 2202027

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://crypto-math.x402tookit.com/gcd-extended"
    ]
  ],
  "name": "Crypto Math",
  "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": "gcd, lcm and extended-Euclid Bezout coefficients of two integers, plus gcd/lcm of up to 20 more.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "a": "240",
              "b": "46",
              "more": ""
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T23:46:28.758Z",
              "bezoutX": "-9",
              "bezoutY": "47",
              "coprime": false,
              "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.",
              "gcd": "2",
              "lcm": "5520",
              "notChecked": [
                "negative numbers (not accepted)",
                "which of the infinitely many Bezout pairs you want: this returns the one the standard algorithm produces"
              ],
              "reasons": [
                "Coefficients come from the extended Euclidean algorithm; a*x + b*y equals the gcd.",
                "Add numbers in the more parameter for a combined gcd and lcm."
              ],
              "source": "extended Euclidean algorithm on JavaScript BigInt, computed locally",
              "summary": "gcd(a, b) = 2, lcm(a, b) = 5520; Bezout: a*(-9) + b*(47) = 2.",
              "verdict": "COMPUTED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "a": {
                      "description": "First non-negative whole number (decimal or 0x hex)",
                      "type": "string"
                    },
                    "b": {
                      "description": "Second non-negative whole number",
                      "type": "string"
                    },
                    "more": {
                      "description": "Comma-separated further non-negative numbers for the combined gcd and lcm (up to 20)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "a",
                    "b"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "bezoutX": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "bezoutY": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "coprime": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "gcd": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "lcm": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "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": "2026-11-01T22:46:15.33Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:46:15.151Z"
    },
    "resource": "https://crypto-math.x402tookit.com/gcd-extended",
    "serviceName": "Crypto Math",
    "tags": [
      "gcd",
      "lcm",
      "euclid",
      "bezout"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "gcd, lcm and extended-Euclid Bezout coefficients of two integers, plus gcd/lcm of up to 20 more."
}

What the leaf hashes

{"body":"3b9a94ca8c075048f00b3d5b8645efd9d46e0f1bda0a431d8ce58ab1831c9b3c","id":2202027,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646811405723,"prev":null,"subject":"x402_bazaar:https://crypto-math.x402tookit.com/gcd-extended","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. 0x859bc04144c5752cecab8b63497a5a6669abd4395cedb243c4e751fe7a584d09
2. 0xf7f7655dc8a96f206d344db969c5ae2df6dd197293d75ea6d2dc926c3df1be4a
3. 0x44e9a7b8ffa700b4fa9b579483195e02dcf4ef76cfe8c0741f6d9f7a34d8a289
4. 0xc556429da8151b54d9f98dc904d0099e677859b9b703ce8d9252c1b4777ecfc2
5. 0x8d6e2c55c3490f1545363f7c44422672f100701e894db77f48e2be1d2c9e9244
6. 0xfab3122978fb1d0441a3a6cb9607836d99fafd7f9bec2a310ab26da59a8aa6a8
7. 0x251bebd6a1cdefebd512965aed8a7e9af94be635708d0502fef0321e55b20bfe
8. 0x694923b87992fdaa53729ea182587f959eb837c4da15e9932ceef42d9a025c2c
9. 0x72936920a9b763b30febb4ef07e735eb7fd1eb8eed63929cc0c4da0850933d8b
10. 0x81489ad75fca0fe426d5974b39402c1d64337dc28d18da61ed3dcedd90f93673
11. 0xafbffad6c5910d6eeb054bc01997b605906e12baa18fdc7fd71513353d34d52c
12. 0xe411f7e720673ba3ec5e17cf225d7b613794f2c0fc54fc3c10f61996c290e915
13. 0x01026267e0e47b54aad32519d39da32ac6f5740a40f20ce4f9f7312a7268ad12
14. 0x45296e5ab7be6d8163e528d05039d4c685fc8962fc80b797c1d68574b10b444c
15. 0x510fa2c647d18bb802da12cf41e17d136163e6624e69ed77e15235c4284b69c7
16. 0x5e23ec5954c11a4530aab8c635a72b12bcfeb6fcb03c6cb1a990cc1743424543
17. 0x1805ef693fbdb2c23fcb61616f830408ca89bec1dc5b68ee47a770ffc0b9760a
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af