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Evidence row 120313

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/kb/sqlalchemy-detached-instance-session-errors
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
b975ee47ab43f150a819a7ab85714cc7d1c2763ae4e0d27b2d01228eff3ef5f4
Leaf
0x0ea41a7910c46a171a6adf3cc462bdc2cc31ed92fad59d66857d68f222cdbc30

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/sqlalchemy-detached-instance-session-errors"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:sqlalchemy-detached-insta",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:sqlalchemy-detached-insta",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:sqlalchemy-detached-insta",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
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          "memo": "saylor:sqlalchemy-detached-insta",
          "reference": "5aSEaTa1sTZrQdgCBfSYk36mFFi43RcpsiE9aQBhgAUp",
          "session": "eyJhcnRpY2xlSWQiOiJzcWxhbGNoZW15LWRldGFjaGVkLWluc3RhbmNlLXNlc3Npb24tZXJyb3JzIiwicmVmZXJlbmNlIjoiNWFTRWFUYTFzVFpyUWRnQ0JmU1lrMzZtRkZpNDNSY3BzaUU5YVFCaGdBVXAiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5Mjk2Mjc1OTYyN30.NdJyVUCj-3pvhZIgWv_pybH-2zXYKtK154hc81ZMzr8"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F",
          "memo": "saylor:sqlalchemy-detached-insta",
          "reference": "5vS4QJPLPsudvgCDcnqCubTKVCHUUBJpdYVn6JkMHeFU",
          "session": "eyJhcnRpY2xlSWQiOiJzcWxhbGNoZW15LWRldGFjaGVkLWluc3RhbmNlLXNlc3Npb24tZXJyb3JzIiwicmVmZXJlbmNlIjoiNXZTNFFKUExQc3VkdmdDRGNucUN1YlRLVkNIVVVCSnBkWVZuNkprTUhlRlUiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5Mjk2Mjc1OTYyN30.YK6vmftXSyaqqxXaI1qw8fYKfINh06S1rtoGD80AHCo"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "95509",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:sqlalchemy-detached-insta",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "98463",
          "reference": "6ZMxpANXvtgTR4ZDfsgt99L3irR6F78uUVCrBqZ6DnuS",
          "session": "eyJhcnRpY2xlSWQiOiJzcWxhbGNoZW15LWRldGFjaGVkLWluc3RhbmNlLXNlc3Npb24tZXJyb3JzIiwicmVmZXJlbmNlIjoiNlpNeHBBTlh2dGdUUjRaRGZzZ3Q5OUwzaXJSNkY3OHVVVkNyQnFaNkRudVMiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTU1MDksImV4cCI6MTc5Mjk2Mjc1OTYyN30.MO6wXOTfasVINyKTxY6KyOtoJqTMRlWbJWIg5mHdnI8",
          "solUsdPrice": 101.56
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        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Fix SQLAlchemy DetachedInstanceError - session scope, selectinload eager loading, expire_on_commit, async MissingGreenlet, FastAPI session dependency",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "Explains SQLAlchemy session lifecycle errors: DetachedInstanceError, object is not bound to a Session, MissingGreenlet in async, expire_on_commit, selectinload and joinedload, scoped sessions, FastAPI dependency pattern and pool overflow.",
              "c": "Self-Hosting & Infra",
              "id": "sqlalchemy-detached-instance-session-errors",
              "t": "Fix SQLAlchemy DetachedInstanceError, \"Session is closed\" and Lazy Load Problems"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-25T21:10:39.672Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-25T21:10:39.454Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/sqlalchemy-detached-instance-session-errors",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "sqlalchemy",
      "python",
      "orm",
      "sessions",
      "fastapi"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Fix SQLAlchemy DetachedInstanceError - session scope, selectinload eager loading, expire_on_commit, async MissingGreenlet, FastAPI session dependency"
}

What the leaf hashes

{"body":"b975ee47ab43f150a819a7ab85714cc7d1c2763ae4e0d27b2d01228eff3ef5f4","id":120313,"kind":"listing","method":"baseline/1","observed_us":1793025617647364,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/sqlalchemy-detached-instance-session-errors","subject_kind":"source_record"}

Proof

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

  1. 0x0ea3b6b4a1e204cb3ffdf7c48110077e19ce8ad8bdc20b2f5c0862cf67ce78cd
  2. 0xfa8b6680f9393dfc40d4478f74f73248e2bcff207eb25673eb51ebc27bea46ae
  3. 0x0989628ed23b13fe760c1d75fcdfe68097f1e9224f8927db9c79149b6002b4e9
  4. 0x8be9127c0545c6cdf346bb45ccff3f6a7a22b2b0cd1487372a91fef1cc8b99ff
  5. 0x9d4e9b9b036e5b187eee4a3b835a25ce43e71e803b8b3e9176860e58340f69e7
  6. 0x95bdaaeeabf20d450caff3a5000a960a7a57ce4ca50d81e18344d8af37d7fa2c
  7. 0xfdf416199a645068aad0c206b86690b9427cef60abddc76aaf30c87b910aaeb3
  8. 0xd0d64129cd3991df3ff242a9cf1c7cf3397d0dc486857c965b0f78ea40553d66
  9. 0x237ff8ead2e807c8c8253ebc3fbd3c0d1d8bc94d78c3e36dfc13945e41878a0f
  10. 0x36de94df31980769366d6459ea42b641bdc51120bfd8317d0101e69404feba8e
  11. 0x1e6a5f0042a4b7776e54cf79ce729b60eac17c4eb209cc9613fcd31c9fa0d26c
  12. 0x129649b2ec48fbc611fb055c3f5627bda42692beb65d09e853d75bcda4e06239
  13. 0x294f7935f78a896b5f246a7c9a7ee1b023720acdb03fff3cd549c63479848ec9
  14. 0xb49e8c2564256e5322e375cb619d9ac70fd17c1d1eba9c991bba4cb6428f45cc
  15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
  16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
  17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
  18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON