{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://concert.foundation/signet/v0.1/bid.schema.json",
  "title": "Bid",
  "description": "A bid in an Auction — one bidder's offer in a given round. The bid sequence is recorded as hash-chained Events; this object is the materialised standing bid. A reverse auction awards the lowest valid bid; a forward auction the highest; a multi-criteria auction the highest-scoring under the evaluationPolicy.",
  "type": "object",
  "required": [
    "id",
    "auction",
    "bidder",
    "value",
    "submittedAt",
    "status"
  ],
  "additionalProperties": false,
  "properties": {
    "@context": {
      "type": [
        "string",
        "object",
        "array"
      ]
    },
    "type": {
      "const": "Bid"
    },
    "id": {
      "$ref": "definitions.schema.json#/definitions/Identifier"
    },
    "auction": {
      "$ref": "definitions.schema.json#/definitions/Identifier",
      "description": "The Auction this bid belongs to."
    },
    "bidder": {
      "$ref": "definitions.schema.json#/definitions/Identifier",
      "description": "The bidding Party."
    },
    "qualification": {
      "$ref": "definitions.schema.json#/definitions/Identifier",
      "description": "The bidder's SupplierQualification (eligibility provenance)."
    },
    "round": {
      "type": "integer",
      "minimum": 1
    },
    "value": {
      "$ref": "definitions.schema.json#/definitions/Value"
    },
    "submittedAt": {
      "type": "string",
      "format": "date-time"
    },
    "status": {
      "type": "string",
      "enum": [
        "active",
        "withdrawn",
        "winning",
        "rejected"
      ]
    }
  }
}