{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://rctp.dev/schemas/offer-counter-request.schema.json",
  "title": "Counter offer request",
  "description": "Body of POST /offers/{id}/counter (verb offer.counter, seller side only). Closed (INV-5).",
  "type": "object",
  "properties": {
    "deal_terms": {
      "$ref": "deal-terms.schema.json"
    },
    "expires_at": {
      "$ref": "common.schema.json#/$defs/Timestamp",
      "description": "Optional; the gateway sets its default and caps it"
    }
  },
  "additionalProperties": false,
  "required": [
    "deal_terms"
  ]
}