{
  "name": "LedgerSentry - Watch folder, ingest, audit",
  "nodes": [
    {
      "parameters": {
        "triggerOn": "folder",
        "path": "={{ $env.LEDGERSENTRY_INBOX || '/data/incoming' }}",
        "events": [
          "add"
        ],
        "options": {
          "usePolling": true,
          "awaitWriteFinish": true
        }
      },
      "id": "watch-inbox",
      "name": "Ledger file lands",
      "type": "n8n-nodes-base.localFileTrigger",
      "typeVersion": 1,
      "position": [
        -220,
        300
      ],
      "notes": "awaitWriteFinish matters: a large export copied over the network would otherwise be picked up half-written."
    },
    {
      "parameters": {
        "method": "POST",
        "url": "={{ $env.LEDGERSENTRY_URL }}/ingest/path",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "X-API-Key",
              "value": "={{ $env.LEDGERSENTRY_API_KEY }}"
            }
          ]
        },
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({ path: $json.path, default_currency: 'USD' }) }}",
        "options": {
          "timeout": 120000
        }
      },
      "id": "ingest",
      "name": "Ingest ledger",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        0,
        300
      ]
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "version": 2
          },
          "conditions": [
            {
              "leftValue": "={{ $json.rows_ingested }}",
              "rightValue": 0,
              "operator": {
                "type": "number",
                "operation": "gt"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "id": "has-rows",
      "name": "Anything ingested?",
      "type": "n8n-nodes-base.if",
      "typeVersion": 2,
      "position": [
        220,
        300
      ],
      "notes": "A file whose every row failed to parse should raise an operator alert, not a clean audit run over zero transactions."
    },
    {
      "parameters": {
        "method": "POST",
        "url": "={{ $env.LEDGERSENTRY_URL }}/audit/run",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "X-API-Key",
              "value": "={{ $env.LEDGERSENTRY_API_KEY }}"
            }
          ]
        },
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={{ JSON.stringify({ batch_id: $json.batch_id, generate_explanations: true }) }}",
        "options": {
          "timeout": 900000
        }
      },
      "id": "run-audit",
      "name": "Run audit",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        460,
        200
      ],
      "notes": "Long timeout: the explanation layer makes one model call per qualifying flag."
    },
    {
      "parameters": {
        "method": "POST",
        "url": "={{ $env.LEDGERSENTRY_URL }}/reports/{{ $json.id }}/export",
        "sendHeaders": true,
        "headerParameters": {
          "parameters": [
            {
              "name": "X-API-Key",
              "value": "={{ $env.LEDGERSENTRY_API_KEY }}"
            }
          ]
        },
        "options": {
          "timeout": 120000
        }
      },
      "id": "export-report",
      "name": "Export report",
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [
        680,
        200
      ]
    },
    {
      "parameters": {
        "select": "channel",
        "channelId": {
          "__rl": true,
          "value": "={{ $env.LEDGERSENTRY_ALERT_CHANNEL }}",
          "mode": "name"
        },
        "text": "=:warning: *LedgerSentry ingest produced no usable rows*\nFile: `{{ $('Ingest ledger').item.json.source_file }}`\nRows read: {{ $('Ingest ledger').item.json.rows_read }}\nParse errors: {{ $('Ingest ledger').item.json.rows_failed }}\n\nLikely an unexpected column layout. Mapped columns: `{{ JSON.stringify($('Ingest ledger').item.json.column_mapping) }}`",
        "otherOptions": {}
      },
      "id": "alert-empty",
      "name": "Alert: nothing ingested",
      "type": "n8n-nodes-base.slack",
      "typeVersion": 2.2,
      "position": [
        460,
        420
      ]
    }
  ],
  "connections": {
    "Ledger file lands": {
      "main": [
        [
          {
            "node": "Ingest ledger",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Ingest ledger": {
      "main": [
        [
          {
            "node": "Anything ingested?",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Anything ingested?": {
      "main": [
        [
          {
            "node": "Run audit",
            "type": "main",
            "index": 0
          }
        ],
        [
          {
            "node": "Alert: nothing ingested",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Run audit": {
      "main": [
        [
          {
            "node": "Export report",
            "type": "main",
            "index": 0
          }
        ]
      ]
    }
  },
  "settings": {
    "executionOrder": "v1"
  },
  "meta": {
    "templateCredsSetupCompleted": false
  }
}