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machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const error = 'error'
  
  const fetchMachine = Machine({
    id: 'wormhole',
    initial: 'idle',
    context: {
      retries: 0
    },
    states: {
      idle: {
        on: {
          dial_alice: 'wait_for_pake_a',
          dial_bob: 'wait_for_pake_b',
          error: 'error'
        }
      },
      wait_for_pake_a: {
        on: {
          pake_a: 'success',
          error: 'error'
        }
      },
      wait_for_pake_b: {
        on: {
          pake_b: 'success',
          error: 'error'
        }
      },
      success: {
        type: 'final'
      },
      error: {
        on: {
          retry: {
            target: 'idle',
            actions: assign({
              retries: (context, event) => context.retries + 1
            })
          }
        }
      }
    }
  });