Evidence row 1261090

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/evaluateExpression"
    ]
  ],
  "name": "Sindri",
  "owner_address": "0x548efd4f4d4a5c3669dbb4cbb2b1a637feeec5f6",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x548eFd4f4d4A5C3669dbb4CBB2B1A637FeeEc5F6",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "APer2AbhckyMWyJanW2MZ2eRLcpL9Lmhks8rkmXfqjRG",
        "scheme": "exact"
      }
    ],
    "description": "Safe arithmetic expression evaluator. Parses and evaluates expressions with +, -, *, /, ^, and parentheses using a bounded-recursion parser (no eval/Function), avoiding the arithmetic slips an LLM makes on long expressions.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "expression": "(2 + 3) * 4"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "params": {
                  "expression": "(2 + 3) * 4"
                },
                "result": 20
              },
              "ok": true
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "expression": {
                      "description": "Arithmetic expression to evaluate, e.g. \"(2 + 3) * 4\". Max 200 characters.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "expression"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "builder-code": {
        "info": {
          "a": "x402_api_vendor",
          "s": [
            "cdp_sdk_server"
          ]
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "a": {
              "description": "App builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "s": {
              "description": "Service builder codes",
              "items": {
                "pattern": "^[a-z0-9_]{1,32}$",
                "type": "string"
              },
              "maxItems": 11,
              "type": "array"
            },
            "w": {
              "description": "Wallet builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            }
          },
          "type": "object"
        }
      },
      "eip2612GasSponsoring": {},
      "erc20ApprovalGasSponsoring": {}
    },
    "lastUpdated": "2026-10-08T06:26:24.2Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-08T06:26:24.092Z"
    },
    "resource": "https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/evaluateExpression",
    "serviceName": "Sindri",
    "tags": [
      "expression evaluator",
      "arithmetic",
      "math parser"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Safe arithmetic expression evaluator. Parses and evaluates expressions with +, -, *, /, ^, and parentheses using a bounded-recursion parser (no eval/Function), avoiding the arithmetic slips an LLM makes on long expressions."
}

What the leaf hashes

{"body":"ad8446ea1502d7fe56fd6e831d9172c2568299308085e5c2c737b5b99ac7202c","id":1261090,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793385501690391,"prev":118632,"subject":"x402_bazaar:https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/evaluateExpression","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x15e6da6bb9b8f4da51aaec8a39986254b5a7307bad062388d24cccd15fa8328d
2. 0xa4b57291e0fdc8136e4ead04f4295bd93c1b672e9c80c21182e2fe781983fb23
3. 0x4e0a8a508c4612744ba792e2aab4bd2b58e732287fdb4a4f13f428104a7e7290
4. 0x5891b61f1f9ff844d116b65d0271567ea5712fb996d0a76f5cf9c31c7152ae53
5. 0xa438d833e1ed4993e5795ce09d13a96c7b9fcc9ec6d93cad6ee1883754f87728
6. 0xe77693bec29db2076f0a8b5e066d1d7e14531458c40306b4900602c9fa58c91b
7. 0xffa41d439e08ab0eb27d6dfc467cee0be2cd3cbe74e92ce4be0b86d639530243
8. 0x9be7d695d046554f737e08eff06898df5a1ed4356b5f21936f97aa5fb0aea227
9. 0x60a93893f6af241736fd46a5f58d627d03af5a0dfda271e7b0ac41901abfbb7e
10. 0x4a1964da12263857e55e1cf92f16bcb1e412c7b22060c8bb75c5f828e001dd64
11. 0x74505f0740eea76d6730955e84a8c592351c7e4d230ffc321d2c29af604c3702
12. 0x3a905595fdeb717ceb1f049edf6e954b2428122e161597f81f6cea9ace9baf6d
13. 0x92f059d385cc236739871f2db0574c5587e23b0b7db1b296bfbeedc2914d4f35
14. 0xe18460a4fef6812b03798b9b10352dd88bf2495282cb7665eff1cdfac9ef6888
15. 0x0313631fba69cc31784d20beec069335df13219f8a8a8a8831740bca4d4aa0a0
16. 0xe2a9872e1b6a01c55a7a8cc5c05c61f3933255db5c26b9c79be4011d28685b52
17. 0xb0c9ef42e725578748f3119c9dbebf2fc437266bda013df29f98ed3ebe621403
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861