Credit an issued invoice

The accounting platform books and sends the credit note inside the request, and the answer is the booked credit note, 201. A full credit takes the whole invoice back and is refused once anything was credited (INVOICE_ALREADY_CREDITED); a partial credit names lines of the invoice, each by no more than is left on it (VALIDATION_FAILED with AMOUNT_EXCEEDS_BILLED under the line). Amounts are before VAT. **Sending it again is safe**: the same external_id is the same credit note, whatever its body says the second time. Booked, it is answered as it stands, 200, and nothing is booked twice; not booked, that attempt is taken up again under its own date and lines. **A credit note that booked and could not be delivered is a success** whose send_error says why. An attempt the platform gave no definite answer to holds every other credit on the invoice back (CREDIT_ATTEMPT_UNRESOLVED, 409) until the request that made it is sent again. Metered against the platform_write bucket as well as default.

curl -X POST "https://example.com/credit-notes" \  -H "Content-Type: application/json" \  -d '{    "external_id": "string",    "invoice": "string",    "kind": "full",    "credit_date": "string"  }'

{  "object": "credit_note",  "id": "string",  "external_id": "string",  "invoice_id": "string",  "customer_id": "string",  "currency": "string",  "kind": "full",  "origin": "manual",  "credit_date": "string",  "issued_at": "string",  "platform_ref": "string",  "platform_number": -9007199254740991,  "send_error": {    "reason": "string",    "platform_reason": "string"  },  "total_amount": 0,  "created_at": "string",  "updated_at": "string",  "lines": [    {      "id": "string",      "invoice_line_id": "string",      "amount": 0,      "position": -9007199254740991    }  ]}