Evidence row 72050

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ca-tax-api-mainnet.lxtap.workers.dev/base/allowance"
    ]
  ],
  "name": "Base Onchain Data",
  "owner_address": "0x2ecb9e1fcca7a62758c679f11bc3241466d181d8",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2ECB9E1fcca7A62758c679F11bC3241466d181d8",
        "scheme": "exact"
      }
    ],
    "description": "ERC-20 allowance on Base: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "owner": "0x698229f40EF287c4B470813e95429f8d764E8054",
              "spender": "0x000000000022D473030F116dDEE9F6B43aC78BA3",
              "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "allowance": "0",
              "chain": "base",
              "owner": "0x698229f40EF287c4B470813e95429f8d764E8054",
              "ownerBalance": "0",
              "raw": "0",
              "spendableNow": "0",
              "spender": "0x000000000022D473030F116dDEE9F6B43aC78BA3",
              "symbol": "USDC",
              "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "unlimited": false
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "owner": {
                      "description": "Address that granted the approval",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "spender": {
                      "description": "Address allowed to spend",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "token": {
                      "description": "ERC-20 contract on Base",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "token",
                    "owner",
                    "spender"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-23T08:31:28.498Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T08:31:28.282Z"
    },
    "resource": "https://ca-tax-api-mainnet.lxtap.workers.dev/base/allowance",
    "serviceName": "Base Onchain Data",
    "tags": [
      "base",
      "onchain",
      "erc20",
      "token",
      "wallet"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "ERC-20 allowance on Base: how much a spender may transfer from an owner, whether the approval is effectively unlimited, the owner's balance, and the amount the spender could move right now."
}

What the leaf hashes

{"body":"ae194e62f16ea6bf9b941e96347bc54faebec6dd31e367aff47b1a29ff5905d0","id":72050,"kind":"listing","method":"baseline/1","observed_us":1793025485187704,"prev":null,"subject":"x402_bazaar:https://ca-tax-api-mainnet.lxtap.workers.dev/base/allowance","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x5690e8f923ade731644137cc5d2060cefc124210ee57a740e3645a249ea1cdba
2. 0x649272ff85e8ad8071bde233c82aa0ec9a41fc04ceeb4bdf23ad3f8f31337c19
3. 0x5a32c8526a238fb8fc7680741f7bf5122c6e8bf9ac04d9bdfbee857906a9b402
4. 0x3147035f03c9bfe3e368957b05748b7e36d9aea53a1c7387002cdf01831cd342
5. 0x7b42c9bc856ca6dd4ff52d9848db7ded1a3357c819dbe7969ddd25fd8b762de3
6. 0x220c1f68ef98b93ebadf079085992d42733a4852b0d8683608d9e52a97cb0646
7. 0x45e16eee3a04f1ce4f250112739cf7d9d7fd0274ecedb90ec3d28981f3a95fc5
8. 0xe915487dac7b24ca470520493ad8ede393a01e9deeb4144875be9636b1e3f3ec
9. 0x7dca6759831bc70cfe9f4675dc59a042e2f1f85f44e42d1fbc0eb83a95baf305
10. 0x438631e7421eacf3402556d871e592ffc7af75fef2b0709de48c3ef78e8d7fac
11. 0x014e6ac2bd09cb47ef261fa8d56392362b98c9b103bb1037674237d3604f081f
12. 0x31b890f57b06aeb1ca9fb0cdc688bb75678ab9b2ff8ba49765e3d7bc0ae98597
13. 0x8ba3430866b4c11cea7eba9923ee4fa8a5074849df417006e4441426c1f13056
14. 0x5cdeb4648502e0633d01cc4f3379d48cccb9d4f528565b2868eb93db0df9e829
15. 0x7726154b91b2ad65b13849ef6cb6443b1f0ff113a3089c9bd5f2bcfc16be099d
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae