cart.merge

Absorb another cart into this one: its lines are added (quantities SUM by the same sku + custom fields rule as add_line) and the absorbed cart is left empty. Requires possession of BOTH cart ids, in the same store. A primitive — deciding WHEN to merge (e.g. at login) is the channel’s policy, not the kernel’s.

• Scope: public
• System: no
• Reachable from: an ANONYMOUS face — no credential, and never /v1/commands/*. Which path serves it is not derivable from the registry; see the anonymous faces.
• Events: none — Merging an anonymous cart into a recognized one rewrites session state only; the recognition itself is what emits (cart.buyer_recognized).

Input (JSON Schema)

{
  "properties": {
    "cart_id": {
      "minLength": 1,
      "type": "string"
    },
    "source_cart_id": {
      "minLength": 1,
      "type": "string"
    }
  },
  "required": [
    "cart_id",
    "source_cart_id"
  ],
  "type": "object"
}

Result (200)

{
  "additionalProperties": false,
  "properties": {
    "cart_id": {
      "type": "string"
    },
    "merged_lines": {
      "maximum": 9007199254740991,
      "minimum": -9007199254740991,
      "type": "integer"
    },
    "source_cart_id": {
      "type": "string"
    }
  },
  "required": [
    "cart_id",
    "source_cart_id",
    "merged_lines"
  ],
  "type": "object"
}

Errors

validation_failed (400) · unauthorized (401) · forbidden (403) · conflict (409) · internal (500)