payment allocation audit derived

{
  "input": {
    "body": {
      "invoices": [
        {
          "id": "INV-1",
          "amount": "500.00",
          "currency": "AUD"
        },
        {
          "id": "INV-2",
          "amount": "250.00",
          "currency": "AUD"
        },
        {
          "id": "INV-3",
          "amount": "100.00",
          "status": "cancelled",
          "currency": "USD"
        }
      ],
      "payments": [
        {
          "id": "PAY-1",
          "amount": "600.00",
          "currency": "AUD"
        },
        {
          "id": "PAY-2",
          "amount": "100.00",
          "currency": "AUD"
        }
      ],
      "allocations": [
        {
          "amount": "500.01",
          "invoice": "INV-1",
          "payment": "PAY-1"
        },
        {
          "amount": "50.00",
          "invoice": "INV-2",
          "payment": "PAY-1"
        },
        {
          "amount": "100.00",
          "invoice": "INV-3",
          "payment": "PAY-2"
        },
        {
          "amount": "0",
          "invoice": "INV-9",
          "payment": "PAY-2"
        }
      ]
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "limits": {
        "maxEntries": 20000,
        "maxAccounts": 5000,
        "maxFindings": 500,
        "maxLinesPerEntry": 500,
        "maxStatementLines": 20000
      },
      "passed": false,
      "complete": true,
      "findings": [
        {
          "code": "CURRENCY_MISMATCH",
          "detail": "Allocation 3 applies a AUD payment to a USD invoice. That is a conversion at a rate this data does not state.",
          "invoice": "INV-3",
          "payment": "PAY-2"
        },
        {
          "code": "ALLOCATION_TO_UNPAYABLE_INVOICE",
          "detail": "Allocation 3 applies 100 to invoice INV-3, whose status is cancelled. Money applied to an invoice in that state is in no receivable figure.",
          "invoice": "INV-3",
          "payment": "PAY-2"
        },
        {
          "code": "ALLOCATION_TO_UNKNOWN_INVOICE",
          "detail": "Allocation 4 applies 0 to invoice INV-9, which is not in the set supplied.",
          "invoice": "INV-9",
          "payment": "PAY-2"
        }
      ],
      "invoices": [
        {
          "amount": "500",
          "status": null,
          "invoice": "INV-1",
          "currency": "AUD",
          "allocated": "500.01",
          "outstanding": "-0.01"
        },
        {
          "amount": "250",
          "status": null,
          "invoice": "INV-2",
          "currency": "AUD",
          "allocated": "50",
          "outstanding": "200"
        },
        {
          "amount": "100",
          "status": "cancelled",
          "invoice": "INV-3",
          "currency": "USD",
          "allocated": "100",
          "outstanding": "0"
        }
      ],
      "payments": [
        {
          "amount": "600",
          "payment": "PAY-1",
          "currency": "AUD",
          "allocated": "550.01",
          "unallocated": "49.99"
        },
        {
          "amount": "100",
          "payment": "PAY-2",
          "currency": "AUD",
          "allocated": "100",
          "unallocated": "0"
        }
      ],
      "reconciled": false,
      "request_id": "example-request",
      "service_id": "payment_allocation_audit",
      "assumptions": [
        "Every total is exact, so an over-allocation of one cent is reported as one cent rather than disappearing into a rounding comparison.",
        "An over-allocated invoice and an over-allocated payment are separate findings, because they are different events: one is money applied beyond what was owed and the other is money applied that was neve...",
        "A cross-currency allocation is reported as a conversion at a rate the data does not state, rather than being converted on an assumption."
      ],
      "limitations": [
        "Whether the allocations supplied are arithmetically consistent with the invoices and payments supplied. Not an audit opinion and not accounting advice: whether a payment was genuinely received, or an ...",
        "reconciled is true only when every allocation resolved, no total was exceeded, and nothing was left sitting unallocated."
      ],
      "observed_at": "2026-10-02T00:00:00.000Z",
      "not_examined": [],
      "finding_count": 6,
      "invoice_count": 3,
      "payment_count": 2,
      "total_invoiced": "850",
      "total_received": "700",
      "service_version": "1.0.0",
      "total_allocated": "650.01",
      "findings_by_code": {
        "CURRENCY_MISMATCH": 1,
        "INVOICE_OVER_ALLOCATED": 1,
        "ALLOCATION_MOVES_NOTHING": 1,
        "PAYMENT_PARTLY_UNALLOCATED": 1,
        "ALLOCATION_TO_UNKNOWN_INVOICE": 1,
        "ALLOCATION_TO_UNPAYABLE_INVOICE": 1
      },
      "total_outstanding": "199.99"
    }
  }
}