{
  "$id": "https://commandlayer.org/schemas/v1.1.0/commercial/purchase/requests/purchase.request.schema.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "purchase.request",
  "description": "Request schema for a direct purchase (no complex cart semantics required).",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "x402": {
      "description": "x402 envelope describing the purchase verb and version.",
      "allOf": [
        {
          "$ref": "https://commandlayer.org/schemas/v1.1.0/_shared/x402.schema.json"
        }
      ]
    },
    "trace": {
      "description": "Trace envelope for correlating this purchase with logs and receipts.",
      "allOf": [
        {
          "$ref": "https://commandlayer.org/schemas/v1.1.0/_shared/trace.schema.json"
        }
      ]
    },
    "payload": {
      "description": "Purchase-specific payload.",
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "item_id": {
          "description": "Primary product or service identifier.",
          "type": "string",
          "minLength": 1,
          "maxLength": 128
        },
        "quantity": {
          "description": "Quantity being purchased.",
          "type": "number",
          "minimum": 0.000001
        },
        "amount": {
          "description": "Expected amount and asset.",
          "allOf": [
            {
              "$ref": "https://commandlayer.org/schemas/v1.1.0/commercial/_shared/payment.amount.schema.json"
            }
          ]
        },
        "settlement": {
          "description": "Expected settlement target.",
          "allOf": [
            {
              "$ref": "https://commandlayer.org/schemas/v1.1.0/commercial/_shared/payment.settlement.schema.json"
            }
          ]
        },
        "metadata": {
          "description": "Optional non-normative metadata (SKU variant, campaign, etc.).",
          "type": "object",
          "additionalProperties": true
        }
      },
      "required": ["item_id", "amount", "settlement"]
    }
  },
  "required": ["x402", "trace", "payload"]
}