Template sales (one link, many payments)

A template sale is one payment link that many buyers can pay, for example a link you share on a social network. Create it with generate-sale and sale_type: template. The sale_url you get back has the form …/sale/template/<id>.

Field	Value
`sale_type`	`template`

How it works:

Each payment creates a new sale (sale_type 4, SaleFromTemplate) with its own payme_sale_id and its own callbacks. The template sale itself stays initial.
The link stays open until you cancel it with cancel-template (send the template's ID as sale_payme_id), or until sale_expiry_seconds passes, if you sent it. Cancelling works only while the template is initial and sets it to canceled; payments on it then fail with error 305.

Limits:

You can't send buyer_key with a template (error 606).
echeck isn't supported on templates (error 4).

Every other generate-sale field is on Create a sale. A template is not the multi-method checkout (sale_payment_method: multi), which lets one buyer choose how to pay: see Create a multi-method checkout sale.