Per-client stock - Wasmou API

Wasmou can allocate a number of units of a variant to your account only. Allocation is a ceiling, separate from your wallet balance:

With no allocation, a variant is unrestricted: you can buy as long as your balance and the shared stock allow it.
With an allocation, you can buy at most remaining units. Every successful purchase consumes the same number of units; a refund returns them.
An allocation can be paused, expired or released by Wasmou. Paused and expired allocations block buying. Released ones are unrestricted again.

The allocation is checked and consumed in the same transaction as your wallet debit, so two parallel requests can never overspend it.

Reading your stock

curl https://api.wasmou.net/api/stock -H "X-Api-Key: YOUR_API_KEY"

{
  "status": "success",
  "data": [{
    "variant_id": 15, "product_id": 15,
    "product_name": "Microsoft Windows 10/11 Pro (license key)",
    "variant_name": "Microsoft Windows 10|11 Pro (PC)",
    "allocated": 12, "used": 3, "remaining": 9,
    "status": "active", "expires_at": null
  }]
}

Catalog variants that have an allocation carry the same data in client_stock.

When stock runs out

{ "status": "error", "message": "Insufficient allocated stock. Only 1 unit(s) remaining on your account for this product.", "data": null }

Nothing is charged and nothing is consumed. Ask Wasmou to raise the allocation, or buy a smaller quantity.