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Update 0beacon-chain-validator.md

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Ivan Martinez 2019-06-04 18:20:16 +09:00 committed by GitHub
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@ -115,12 +115,11 @@ Once a validator has been processed and added to the beacon state's `validator_r
In normal operation, the validator is quickly activated at which point the validator is added to the shuffling and begins validation after an additional `ACTIVATION_EXIT_DELAY` epochs (25.6 minutes).
The function [`is_active_validator`](../core/0_beacon-chain.md#is_active_validator) can be used to check if a validator is active during a given shuffling epoch. Note that the `BeaconState` contains a field `current_shuffling_epoch` which dictates from which epoch the current active validators are taken. Usage is as follows:
The function [`is_active_validator`](../core/0_beacon-chain.md#is_active_validator) can be used to check if a validator is active during a given epoch. Usage is as follows:
```python
shuffling_epoch = state.current_shuffling_epoch
validator = state.validator_registry[validator_index]
is_active = is_active_validator(validator, shuffling_epoch)
is_active = is_active_validator(validator, get_current_epoch(state))
```
Once a validator is activated, the validator is assigned [responsibilities](#beacon-chain-responsibilities) until exited.