{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/now-payments/refs/heads/main/json-schema/payment.json",
  "title": "Payment",
  "description": "Schema for a NOWPayments cryptocurrency payment object",
  "type": "object",
  "properties": {
    "payment_id": {
      "type": "integer",
      "description": "Unique payment identifier"
    },
    "payment_status": {
      "type": "string",
      "description": "Current status of the payment",
      "enum": ["waiting", "confirming", "confirmed", "sending", "partially_paid", "finished", "failed", "refunded", "expired"]
    },
    "pay_address": {
      "type": "string",
      "description": "Cryptocurrency address the customer should send payment to"
    },
    "price_amount": {
      "type": "number",
      "description": "Requested payment amount in fiat currency"
    },
    "price_currency": {
      "type": "string",
      "description": "Fiat currency code (e.g. usd, eur)"
    },
    "pay_amount": {
      "type": "number",
      "description": "Amount to pay in cryptocurrency"
    },
    "actually_paid": {
      "type": "number",
      "description": "Amount actually received so far"
    },
    "pay_currency": {
      "type": "string",
      "description": "Cryptocurrency used for payment (e.g. btc, eth)"
    },
    "order_id": {
      "type": "string",
      "description": "Merchant-defined order identifier"
    },
    "order_description": {
      "type": "string",
      "description": "Human-readable order description"
    },
    "ipn_callback_url": {
      "type": "string",
      "format": "uri",
      "description": "URL for IPN callback notifications"
    },
    "purchase_id": {
      "type": "integer",
      "description": "Purchase identifier"
    },
    "outcome_amount": {
      "type": "number",
      "description": "Amount to be credited to merchant after conversion"
    },
    "outcome_currency": {
      "type": "string",
      "description": "Currency of the outcome amount"
    },
    "created_at": {
      "type": "string",
      "format": "date-time",
      "description": "Payment creation timestamp"
    },
    "updated_at": {
      "type": "string",
      "format": "date-time",
      "description": "Payment last update timestamp"
    }
  },
  "required": ["payment_id", "payment_status", "pay_address", "price_amount", "price_currency", "pay_amount", "pay_currency"]
}