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machine.js

   // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
const FS =  {
  IDLE: 'idle',
  COOLDOWN: 'cooldown',
  ERROR: 'error',
  NO_RETRY: 'no_retry',
  CHECKING_MOMENT: 'checking_moment',
  CHECK_ORDER_FOR_INVOCATION: 'check_order_for_invocation',
  CANCELING_MOMENT_SALE: 'canceling_moment_sale',
  POLLING_LISTING_ORDER_FOR_INVOCATION: 'polling_listing_order_for_invocation',
  REDIRECTING_TO_DAPPER: 'redirecting_to_dapper',
  SUCCESS: 'success',
}
  
const IGNORE_ERRORS_DURATION = 3000;
  
const delistMachine = Machine({
  id: 'delistMoment',
  initial: FS.IDLE,
  states: {
    [FS.IDLE]: {
      initial: FS.IDLE,
      states: {
        [FS.IDLE]: {
          id: 'idle',
        },
        [FS.ERROR]: { id: 'error' },
        [FS.NO_RETRY]: { id: 'no_retry' },
      },
      on: {
        DELIST_MOMENT: [
          { target: '#cooldown', cond: 'isCooldownEnabled' },
          { target: '#checking_moment' },
        ],
      },
    },

    [FS.COOLDOWN]: {
      id: 'cooldown',
      on: {
        CONFIRM: '#checking_moment',
        DISMISS: '#idle',
      },
    },
    [FS.CHECKING_MOMENT]: {
      id: 'checking_moment',
      invoke: {
        src: 'checkIsMomentStillForSale',
        onDone: {
          target: '#check_order_for_invocation',
        },
        onError: [
          {
            cond: 'isNoRetryError',
            target: '#no_retry',
            actions: 'setError',
          },
          {
            target: '#error',
            actions: 'setError',
          },
        ],
      },
    },
    [FS.CHECK_ORDER_FOR_INVOCATION]: {
      id: 'check_order_for_invocation',
      invoke: {
        src: 'checkListingOrder',
        onDone: [
          {
            target: '#success',
            cond: 'isDelisted',
          },
          {
            target: '#canceling_moment_sale',
            cond: 'isNoInvocationCreated',
          },
          {
            target: '#redirecting_to_dapper',
            cond: 'hasInvocation',
          },
          {
            target: '#polling_listing_order_for_invocation',
            cond: 'willCheckInvocation',
          },
          {
            target: '#error',
            actions: 'setError',
          },
        ],
        onError: {
          target: '#error',
          actions: 'setError',
        },
      },
    },
    [FS.SUCCESS]: {
      id: 'success',
      type: 'final',
    },

    [FS.CANCELING_MOMENT_SALE]: {
      id: 'canceling_moment_sale',
      invoke: {
        src: 'placeDelistingOrder',
        onDone: '#polling_listing_order_for_invocation',
        onError: {
          target: '#error',
          actions: 'setError',
        },
      },
    },
    [FS.POLLING_LISTING_ORDER_FOR_INVOCATION]: {
      id: 'polling_listing_order_for_invocation',
      after: {
        [IGNORE_ERRORS_DURATION]: {
          actions: send('STOP', { to: 'pollOrderService' }),
        },
      },
      invoke: {
        id: 'pollOrderService',
        src: 'pollOrder',
        onError: {
          target: '#error',
          actions: 'setError',
        },
      },
      on: {
        POLL_ORDER_SUCCESS: [
          { target: '#success', cond: 'isDelisted' },
          { target: '#redirecting_to_dapper' },
        ],
        POLL_ORDER_ERROR: [
          {
            target: '#error',
            actions: 'setError',
          },
        ],
      },
    },

    [FS.REDIRECTING_TO_DAPPER]: {
      id: 'redirecting_to_dapper',
      type: 'final',
      invoke: {
        src: 'redirectToDelist',
      },
    },
  },
}, {
  guards: {
    isCooldownEnabled: () => true,
    isDelisted: () => false,
    isNoInvocationCreated: () => true,
    hasInvocation: () => false,
    willHaveInvocation: () => false,
    isNoRetryError: () => false,
  },
});