mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 12:57:18 +00:00
f1114ca35c
* fix current boundary issue * gazelle * test fix * deprecate old epoch processing justified hash indices * finality fixes * fmt * pseudocode * underflow conditions * add back att fix * remove off by one fix * fix most tests * fix all tests
57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
package helpers
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import (
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pb "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
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"github.com/prysmaticlabs/prysm/shared/params"
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)
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// SlotToEpoch returns the epoch number of the input slot.
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//
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// Spec pseudocode definition:
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// def slot_to_epoch(slot: SlotNumber) -> EpochNumber:
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// return slot // SLOTS_PER_EPOCH
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func SlotToEpoch(slot uint64) uint64 {
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return slot / params.BeaconConfig().SlotsPerEpoch
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}
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// CurrentEpoch returns the current epoch number calculated from
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// the slot number stored in beacon state.
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//
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// Spec pseudocode definition:
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// def get_current_epoch(state: BeaconState) -> EpochNumber:
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// return slot_to_epoch(state.slot)
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func CurrentEpoch(state *pb.BeaconState) uint64 {
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return SlotToEpoch(state.Slot)
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}
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// PrevEpoch returns the previous epoch number calculated from
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// the slot number stored in beacon state. It also checks for
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// underflow condition.
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func PrevEpoch(state *pb.BeaconState) uint64 {
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if SlotToEpoch(state.Slot) == params.BeaconConfig().GenesisEpoch {
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return params.BeaconConfig().GenesisEpoch
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}
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return SlotToEpoch(state.Slot) - 1
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}
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// NextEpoch returns the next epoch number calculated form
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// the slot number stored in beacon state.
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func NextEpoch(state *pb.BeaconState) uint64 {
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return SlotToEpoch(state.Slot) + 1
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}
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// StartSlot returns the first slot number of the
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// current epoch.
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//
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// Spec pseudocode definition:
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// def get_epoch_start_slot(epoch: EpochNumber) -> SlotNumber:
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// return epoch * SLOTS_PER_EPOCH
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func StartSlot(epoch uint64) uint64 {
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return epoch * params.BeaconConfig().SlotsPerEpoch
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}
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// AttestationCurrentEpoch returns the current epoch referenced by the attestation.
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func AttestationCurrentEpoch(att *pb.AttestationData) uint64 {
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return SlotToEpoch(att.Slot)
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}
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