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machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const maschine = Machine({
  key: "subscription",
  initial: "free",
  context: { provider: undefined },
  states: {
    free: {
      on: { START: "subscribed" },
    },
    expired: {
      initial: "churned",
      states: {
        churned: {
          on: {
            RESTART: "#subscription.subscribed",
            WIN_BACK: "#subscription.subscribed",
          },
        },
        inBillingRetry: {
          on: {
            RECOVER: "#subscription.subscribed",
            RESTART: "#subscription.subscribed",
            WIN_BACK: "#subscription.subscribed",
            FAILED_TO_RECOVER: "churned",
          },
        },
      },
    },
    subscribed: {
      initial: "autoRenewing",
      states: {
        autoRenewing: {
          on: {
            RENEW: "autoRenewing",
            CANCEL: "expiring",
            REFUND: "#subscription.expired",
            BILLING_ERROR: "inGracePeriod",
          },
        },
        expiring: {
          on: {
            EXPIRE: "#subscription.expired",
            RETAIN: "autoRenewing",
            RESTART: "autoRenewing",
          },
        },
        inGracePeriod: {
          on: {
            RECOVER: "autoRenewing",
            GRACE_PERIOD_END: "#subscription.expired.inBillingRetry",
          },
        },
      },
    },
  },
});