create-invoice

# Create and Send Invoice 4 API calls. Preemptive bank setup on account 1920. No separate product or order. ## Call 1: Create Customer ```json POST /customer {"name": "<customer name>", "organizationNumber": "<org number>", "isCustomer": true} ``` ## Call 2: Bank Account Setup (GET + PUT on account 1920) ``` GET /ledger/account?number=1920&fields=id,number,bankAccountNumber,isBankAccount ``` If `bankAccountNumber` is empty: ```json PUT /ledger/account/<id> {"id": <id>, "name": "Bankinnskudd", "number": 1920, "bankAccountNumber": "86011117947", "isBankAccount": true} ``` Calls 1 and 2 (GET part) are independent — run in parallel. ## Call 3: Create AND Send Invoice (inline order + auto-send) ``` POST /invoice?sendToCustomer=true ``` ```json { "invoiceDate": "2026-03-21", "invoiceDueDate": "2026-04-04", "orders": [ { "customer": {"id": <customer_id>}, "orderDate": "2026-03-21", "deliveryDate": "2026-03-21", "orderLines": [ { "description": "<service name from prompt>", "unitPriceExcludingVatCurrency": <amount>, "vatType": {"id": 3}, "count": 1 } ] } ] } ``` Do NOT call PUT /:send separately — `sendToCustomer=true` handles it. **Total: 4 calls, 0 errors.** ## STRICT RULES - Bank setup MUST be on account **1920** — creating new bank accounts does NOT satisfy the invoice check - Do NOT POST /ledger/account to create a new bank — it blocks PUT on 1920 ("number in use") - Bank number is ALWAYS `86011117947` — never guess - `vatType: {"id": 3}` is REQUIRED on order lines - `sendToCustomer=true` handles sending — no separate PUT /:send