{
  "udl": 2,
  "version": 1,
  "product": "cars",
  "title": "Cars",
  "currency": "SAR",
  "parties": {
    "buyer": {
      "kind": "person"
    },
    "seller": {
      "kind": "business"
    },
    "marketplace": {
      "kind": "business"
    },
    "tax": {
      "kind": "business"
    }
  },
  "objects": [],
  "instruments": [
    {
      "id": "sale",
      "title": "Sale",
      "summary": "Capped seller fee and VAT on held purchase money",
      "fields": [
        {
          "name": "price",
          "type": "money",
          "minimum": "1"
        },
        {
          "name": "held",
          "type": "account",
          "owner": "self",
          "book": "cash"
        },
        {
          "name": "deliveredAt",
          "type": "date"
        },
        {
          "name": "returnVerified",
          "type": "boolean"
        },
        {
          "name": "uncappedFee",
          "type": "money"
        },
        {
          "name": "sellerFee",
          "type": "money"
        },
        {
          "name": "serviceTax",
          "type": "money"
        },
        {
          "name": "sellerNet",
          "type": "money"
        }
      ],
      "calculate": [
        {
          "target": "uncappedFee",
          "op": "rate",
          "base": {
            "field": "self.price"
          },
          "bps": {
            "literal": 100
          },
          "rounding": "floor"
        },
        {
          "target": "sellerFee",
          "op": "minimum",
          "values": [
            {
              "field": "self.uncappedFee"
            },
            {
              "literal": "75000"
            }
          ]
        },
        {
          "target": "serviceTax",
          "op": "rate",
          "base": {
            "field": "self.sellerFee"
          },
          "bps": {
            "literal": 1500
          },
          "rounding": "floor"
        },
        {
          "target": "sellerNet",
          "op": "subtract",
          "base": {
            "field": "self.price"
          },
          "subtract": [
            {
              "field": "self.sellerFee"
            },
            {
              "field": "self.serviceTax"
            }
          ]
        }
      ],
      "lifecycle": {
        "states": ["created", "funded", "accepted", "released", "refunded"],
        "initial": "created",
        "transitions": {
          "fund": {
            "from": ["created"],
            "to": "funded"
          },
          "accept": {
            "from": ["funded"],
            "to": "accepted"
          },
          "release": {
            "from": ["accepted"],
            "to": "released"
          },
          "refund": {
            "from": ["funded", "accepted"],
            "to": "refunded"
          }
        }
      },
      "actions": {
        "create": {
          "summary": "Open a sale hold",
          "event": "sale.create",
          "actor": "caller",
          "input": [],
          "requires": [],
          "moves": []
        },
        "fund": {
          "summary": "Fund the purchase",
          "event": "sale.fund",
          "actor": "caller",
          "input": [],
          "requires": [],
          "moves": [
            {
              "key": "fund",
              "operation": "internal_transfer.create",
              "amount": {
                "field": "self.price"
              },
              "from": "party.buyer",
              "to": "self.held"
            }
          ],
          "publicAction": "fundSale"
        },
        "accept": {
          "summary": "Accept delivery",
          "event": "sale.accept",
          "actor": "caller",
          "input": [],
          "requires": [],
          "moves": [],
          "deadline": {
            "at": "self.deliveredAt",
            "offset": 172800000
          },
          "publicAction": "acceptSale"
        },
        "release": {
          "summary": "Pay seller net, fee and VAT",
          "event": "sale.release",
          "actor": "caller",
          "input": [],
          "requires": [],
          "moves": [
            {
              "key": "seller",
              "operation": "internal_transfer.create",
              "amount": {
                "field": "self.sellerNet"
              },
              "from": "self.held",
              "to": "party.seller"
            },
            {
              "key": "fee",
              "operation": "internal_transfer.create",
              "amount": {
                "field": "self.sellerFee"
              },
              "from": "self.held",
              "to": "party.marketplace"
            },
            {
              "key": "tax",
              "operation": "internal_transfer.create",
              "amount": {
                "field": "self.serviceTax"
              },
              "from": "self.held",
              "to": "party.tax"
            }
          ],
          "publicAction": "releaseSale"
        },
        "refund": {
          "summary": "Refund after verified return",
          "event": "sale.refund",
          "actor": "caller",
          "input": [],
          "requires": [
            {
              "kind": "compare",
              "left": {
                "field": "self.returnVerified"
              },
              "operator": "==",
              "right": {
                "literal": true
              }
            }
          ],
          "moves": [
            {
              "key": "refund",
              "operation": "internal_transfer.create",
              "amount": {
                "field": "self.price"
              },
              "from": "self.held",
              "to": "party.buyer"
            }
          ],
          "publicAction": "refundSale"
        }
      },
      "actionOrder": ["create", "fund", "accept", "release", "refund"]
    }
  ]
}