Evidence row 2202025

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://crypto-math.x402tookit.com/mod-pow"
    ]
  ],
  "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": "Modular exponentiation base^exp mod m for big integers, decimal or 0x hex, up to 4096 bits.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "base": "4",
              "exp": "13",
              "mod": "497"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T23:46:29.288Z",
              "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.",
              "exponentBits": 4,
              "modulusBits": 9,
              "notChecked": [
                "whether the modulus is prime or the base is a unit",
                "side channels: this is not constant-time, so never use it with a secret exponent",
                "…1 more"
              ],
              "reasons": [
                "Computed by square-and-multiply; a negative base is first reduced into 0..m-1."
              ],
              "result": {
                "bits": 9,
                "decimal": "445",
                "hex": "0x1bd"
              },
              "source": "square-and-multiply on JavaScript BigInt, computed locally",
              "summary": "base^exp mod m = 445.",
              "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": {
                    "base": {
                      "description": "Base, whole number (decimal or 0x hex, may be negative)",
                      "type": "string"
                    },
                    "exp": {
                      "description": "Exponent, non-negative whole number",
                      "type": "string"
                    },
                    "mod": {
                      "description": "Modulus, whole number of at least 1",
                      "type": "string"
                    }
                  },
                  "required": [
                    "base",
                    "exp",
                    "mod"
                  ],
                  "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"
                      ]
                    },
                    "exponentBits": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "modulusBits": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "result": {
                      "properties": {
                        "bits": {
                          "type": [
                            "null",
                            "number"
                          ]
                        },
                        "decimal": {
                          "type": [
                            "null",
                            "string"
                          ]
                        },
                        "hex": {
                          "type": [
                            "null",
                            "string"
                          ]
                        }
                      },
                      "type": [
                        "null",
                        "object"
                      ]
                    },
                    "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": "2026-11-01T22:46:21.996Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:46:21.825Z"
    },
    "resource": "https://crypto-math.x402tookit.com/mod-pow",
    "serviceName": "Crypto Math",
    "tags": [
      "modular",
      "exponentiation",
      "bigint",
      "number-theory"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Modular exponentiation base^exp mod m for big integers, decimal or 0x hex, up to 4096 bits."
}

What the leaf hashes

{"body":"f5cd4d863042783b42620a7080f1bf01c87c1f668b41ffbff0daeebf6505466a","id":2202025,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646811398142,"prev":null,"subject":"x402_bazaar:https://crypto-math.x402tookit.com/mod-pow","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. 0xf16e6e136de8ac35b5da06f74ebda8d38eff90110c4a9f989660dd59670153fe
2. 0x24f92c5674a6e7a88fcbfaba795fb99591d2585b43c287838659a09c3b75de51
3. 0xa07133e95c4d494495850854ce3e228de2dc0d7b3460d0d4694354762f0c0c6f
4. 0x5849fb23e4534c627728892d513443a485d93f9d403289fd0036d34f81fa989a
5. 0x133a7db3cb498f4e59e857faefc48c5318e34f2347a060b7fd1bdd83968bd4f8
6. 0x3c063ef326488bfc56d188ba8ef500baf39944947738a569ffa6a9d76297ab10
7. 0xd80ca0e270ade2db6b7d35a1cfa1f1a731c02ad321ebd7b03e0335dee14e6e8d
8. 0xc4766f081749d72b5fbaddadf6bed5b73b91caf42692aa983e87aed36d67b3fd
9. 0x4c83bebb889105ce99411d219b74eb93bc8e68e4e647b3f08e9063b0b0a7ba73
10. 0xec71a46b7fc05bd6bf4c779cef84b35fede93734c26c463dd9afe0e3162873f6
11. 0x524cc790fd0b51cdb2aa348ae9ccb36a08ded8f64237535924a01130cbfefa56
12. 0xb1cfd9a92a45cec10e39ecd4e3a55abe88d7bed40e1bf1019d4093968673e4e9
13. 0x50f257017d1a47b165e9de41b6c7be745b632a9ae0d6de998c4ca2182e3793b3
14. 0xfa8b123f46e2c0606637c2fc0bef7815e7e004938cca6b86fafd908901f0b35f
15. 0xde6a8fd6590b70565baa6078cbc8add8d94950fe959ebaf8c3716adcdbd78aa8
16. 0x6dd7e4db65395e8670c7c2747d44fec79e03305934ef4746bf5dbca04ec6ec49
17. 0xec5d643575d83c9e07e65deeef71943b53cbf3007e7e2b9a6ef414081509b0cc
18. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af