mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 21:07:18 +00:00
76 lines
2.3 KiB
Go
76 lines
2.3 KiB
Go
package sync
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import (
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"context"
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"github.com/gogo/protobuf/proto"
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"github.com/karlseguin/ccache"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/blocks"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/state"
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"github.com/prysmaticlabs/prysm/beacon-chain/p2p"
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ethpb "github.com/prysmaticlabs/prysm/proto/eth/v1alpha1"
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"github.com/prysmaticlabs/prysm/shared/hashutil"
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"github.com/prysmaticlabs/prysm/shared/params"
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)
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// seenAttesterSlashings represents a cache of all the seen slashings
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var seenAttesterSlashings = ccache.New(ccache.Configure())
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func attSlashingCacheKey(slashing *ethpb.AttesterSlashing) (string, error) {
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hash, err := hashutil.HashProto(slashing)
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if err != nil {
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return "", err
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}
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return string(hash[:]), nil
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}
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// Clients who receive an attester slashing on this topic MUST validate the conditions within VerifyAttesterSlashing before
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// forwarding it across the network.
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func (r *RegularSync) validateAttesterSlashing(ctx context.Context, msg proto.Message, p p2p.Broadcaster, fromSelf bool) bool {
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slashing, ok := msg.(*ethpb.AttesterSlashing)
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if !ok {
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return false
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}
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cacheKey, err := attSlashingCacheKey(slashing)
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if err != nil {
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log.WithError(err).Warn("could not hash attester slashing")
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return false
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}
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invalidKey := invalid + cacheKey
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if seenAttesterSlashings.Get(invalidKey) != nil {
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return false
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}
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if seenAttesterSlashings.Get(cacheKey) != nil {
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return false
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}
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// Retrieve head state, advance state to the epoch slot used specified in slashing message.
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s := r.chain.HeadState()
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slashSlot := slashing.Attestation_1.Data.Target.Epoch * params.BeaconConfig().SlotsPerEpoch
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if s.Slot < slashSlot {
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var err error
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s, err = state.ProcessSlots(ctx, s, slashSlot)
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if err != nil {
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log.WithError(err).Errorf("Failed to advance state to slot %d", slashSlot)
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return false
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}
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}
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if err := blocks.VerifyAttesterSlashing(s, slashing); err != nil {
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log.WithError(err).Warn("Received invalid attester slashing")
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seenAttesterSlashings.Set(invalidKey, true /*value*/, oneYear /*TTL*/)
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return false
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}
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seenAttesterSlashings.Set(cacheKey, true /*value*/, oneYear /*TTL*/)
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if fromSelf {
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return false
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}
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if err := p.Broadcast(ctx, slashing); err != nil {
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log.WithError(err).Error("Failed to propagate attester slashing")
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}
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return true
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}
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