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b4689e20c6
## Proposed Changes Implement the consensus changes necessary for the upcoming Altair hard fork. ## Additional Info This is quite a heavy refactor, with pivotal types like the `BeaconState` and `BeaconBlock` changing from structs to enums. This ripples through the whole codebase with field accesses changing to methods, e.g. `state.slot` => `state.slot()`. Co-authored-by: realbigsean <seananderson33@gmail.com>
40 lines
1.3 KiB
Rust
40 lines
1.3 KiB
Rust
use safe_arith::SafeArith;
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use std::cmp::max;
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use types::{BeaconStateError as Error, *};
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/// Initiate the exit of the validator of the given `index`.
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pub fn initiate_validator_exit<T: EthSpec>(
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state: &mut BeaconState<T>,
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index: usize,
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spec: &ChainSpec,
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) -> Result<(), Error> {
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// Return if the validator already initiated exit
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if state.get_validator(index)?.exit_epoch != spec.far_future_epoch {
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return Ok(());
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}
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// Ensure the exit cache is built.
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state.build_exit_cache(spec)?;
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// Compute exit queue epoch
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let delayed_epoch = state.compute_activation_exit_epoch(state.current_epoch(), spec)?;
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let mut exit_queue_epoch = state
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.exit_cache()
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.max_epoch()?
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.map_or(delayed_epoch, |epoch| max(epoch, delayed_epoch));
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let exit_queue_churn = state.exit_cache().get_churn_at(exit_queue_epoch)?;
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if exit_queue_churn >= state.get_churn_limit(spec)? {
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exit_queue_epoch.safe_add_assign(1)?;
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}
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state
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.exit_cache_mut()
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.record_validator_exit(exit_queue_epoch)?;
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state.get_validator_mut(index)?.exit_epoch = exit_queue_epoch;
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state.get_validator_mut(index)?.withdrawable_epoch =
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exit_queue_epoch.safe_add(spec.min_validator_withdrawability_delay)?;
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Ok(())
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}
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