receipt.json

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://modelmarket.dev/schemas/receipt.json",
  "title": "AI Market Signed Receipt",
  "description": "Payment receipt for a capability invocation",
  "type": "object",
  "required": ["nonce", "product_id", "capability_id", "price_usd", "timestamp", "signature"],
  "properties": {
    "nonce": {"type": "string", "description": "Unique receipt identifier"},
    "product_id": {"type": "string"},
    "capability_id": {"type": "string"},
    "price_usd": {"type": "number", "minimum": 0},
    "latency_ms": {"type": "integer"},
    "success": {"type": "boolean"},
    "channel_id": {"type": "string"},
    "consumer_hub": {"type": "string", "format": "uri"},
    "routing_fee_bps": {"type": "integer"},
    "timestamp": {"type": "string", "format": "date-time"},
    "verification": {"type": "object", "description": "Pay-on-Verified envelope (unsigned receipt field; the envelope carries its own ed25519 signature once resolved)"},
    "signature": {
      "type": "object",
      "required": ["algorithm", "value"],
      "properties": {
        "algorithm": {"type": "string", "const": "ed25519"},
        "value": {"type": "string"}
      }
    }
  }
}