{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/paystack/main/json-schema/paystack-subscription-schema.json",
  "title": "Paystack Subscription",
  "description": "A recurring subscription that charges a customer on a defined plan interval.",
  "type": "object",
  "required": ["subscription_code", "customer", "plan", "status"],
  "properties": {
    "id": { "type": "integer" },
    "subscription_code": {
      "type": "string",
      "pattern": "^SUB_[a-zA-Z0-9]+$",
      "description": "Paystack-issued subscription code (prefixed with SUB_)."
    },
    "email_token": {
      "type": "string",
      "description": "Token used for customer-facing self-service subscription management links."
    },
    "amount": { "type": "integer" },
    "cron_expression": { "type": "string" },
    "next_payment_date": { "type": ["string", "null"], "format": "date-time" },
    "status": {
      "type": "string",
      "enum": ["active", "non-renewing", "attention", "completed", "cancelled"]
    },
    "start": { "type": "integer" },
    "customer": { "$ref": "paystack-customer-schema.json" },
    "plan": { "$ref": "paystack-plan-schema.json" },
    "authorization": {
      "type": "object",
      "description": "The reusable card authorization charged on each renewal."
    },
    "created_at": { "type": "string", "format": "date-time" }
  }
}