mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-23 03:51:29 +00:00
283 lines
9.2 KiB
Go
283 lines
9.2 KiB
Go
package client
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import (
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"context"
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"fmt"
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"sync"
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"time"
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"github.com/pkg/errors"
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"github.com/prysmaticlabs/prysm/v4/cmd/validator/flags"
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fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
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"github.com/prysmaticlabs/prysm/v4/config/params"
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"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
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"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
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"github.com/prysmaticlabs/prysm/v4/time/slots"
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"github.com/prysmaticlabs/prysm/v4/validator/client/iface"
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"go.opencensus.io/trace"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// time to wait before trying to reconnect with beacon node.
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var backOffPeriod = 10 * time.Second
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// Run the main validator routine. This routine exits if the context is
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// canceled.
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//
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// Order of operations:
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// 1 - Initialize validator data
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// 2 - Wait for validator activation
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// 3 - Wait for the next slot start
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// 4 - Update assignments
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// 5 - Determine role at current slot
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// 6 - Perform assigned role, if any
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func run(ctx context.Context, v iface.Validator) {
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cleanup := v.Done
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defer cleanup()
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headSlot, err := initializeValidatorAndGetHeadSlot(ctx, v)
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if err != nil {
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return // Exit if context is canceled.
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}
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connectionErrorChannel := make(chan error, 1)
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go v.ReceiveBlocks(ctx, connectionErrorChannel)
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if err := v.UpdateDuties(ctx, headSlot); err != nil {
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handleAssignmentError(err, headSlot)
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}
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accountsChangedChan := make(chan [][fieldparams.BLSPubkeyLength]byte, 1)
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km, err := v.Keymanager()
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if err != nil {
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log.WithError(err).Fatal("Could not get keymanager")
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}
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sub := km.SubscribeAccountChanges(accountsChangedChan)
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// check if proposer settings is still nil
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// Set properties on the beacon node like the fee recipient for validators that are being used & active.
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if v.ProposerSettings() != nil {
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log.Infof("Validator client started with provided proposer settings that sets options such as fee recipient"+
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" and will periodically update the beacon node and custom builder (if --%s)", flags.EnableBuilderFlag.Name)
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deadline := time.Now().Add(5 * time.Minute)
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if err := v.PushProposerSettings(ctx, km, headSlot, deadline); err != nil {
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if errors.Is(err, ErrBuilderValidatorRegistration) {
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log.WithError(err).Warn("Push proposer settings error")
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} else {
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log.WithError(err).Fatal("Failed to update proposer settings") // allow fatal. skipcq
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}
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}
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} else {
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log.Warn("Validator client started without proposer settings such as fee recipient" +
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" and will continue to use settings provided in the beacon node.")
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}
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for {
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_, cancel := context.WithCancel(ctx)
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ctx, span := trace.StartSpan(ctx, "validator.processSlot")
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select {
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case <-ctx.Done():
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log.Info("Context canceled, stopping validator")
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span.End()
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cancel()
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sub.Unsubscribe()
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close(accountsChangedChan)
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return // Exit if context is canceled.
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case blocksError := <-connectionErrorChannel:
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if blocksError != nil {
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log.WithError(blocksError).Warn("block stream interrupted")
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go v.ReceiveBlocks(ctx, connectionErrorChannel)
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continue
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}
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case currentKeys := <-accountsChangedChan:
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onAccountsChanged(ctx, v, currentKeys, accountsChangedChan)
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case slot := <-v.NextSlot():
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span.AddAttributes(trace.Int64Attribute("slot", int64(slot))) // lint:ignore uintcast -- This conversion is OK for tracing.
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deadline := v.SlotDeadline(slot)
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slotCtx, cancel := context.WithDeadline(ctx, deadline)
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log := log.WithField("slot", slot)
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log.WithField("deadline", deadline).Debug("Set deadline for proposals and attestations")
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// Keep trying to update assignments if they are nil or if we are past an
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// epoch transition in the beacon node's state.
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if err := v.UpdateDuties(ctx, slot); err != nil {
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handleAssignmentError(err, slot)
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cancel()
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span.End()
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continue
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}
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// call push proposer setting at the start of each epoch to account for the following edge case:
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// proposer is activated at the start of epoch and tries to propose immediately
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if slots.IsEpochStart(slot) && v.ProposerSettings() != nil {
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go func() {
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// deadline set for 1 epoch from call to not overlap.
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epochDeadline := v.SlotDeadline(slot + params.BeaconConfig().SlotsPerEpoch - 1)
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if err := v.PushProposerSettings(ctx, km, slot, epochDeadline); err != nil {
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log.WithError(err).Warn("Failed to update proposer settings")
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}
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}()
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}
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// Start fetching domain data for the next epoch.
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if slots.IsEpochEnd(slot) {
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go v.UpdateDomainDataCaches(ctx, slot+1)
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}
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var wg sync.WaitGroup
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allRoles, err := v.RolesAt(ctx, slot)
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if err != nil {
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log.WithError(err).Error("Could not get validator roles")
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cancel()
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span.End()
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continue
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}
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performRoles(slotCtx, allRoles, v, slot, &wg, span)
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}
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}
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}
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func onAccountsChanged(ctx context.Context, v iface.Validator, current [][48]byte, ac chan [][fieldparams.BLSPubkeyLength]byte) {
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anyActive, err := v.HandleKeyReload(ctx, current)
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if err != nil {
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log.WithError(err).Error("Could not properly handle reloaded keys")
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}
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if !anyActive {
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log.Warn("No active keys found. Waiting for activation...")
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err := v.WaitForActivation(ctx, ac)
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if err != nil {
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log.WithError(err).Warn("Could not wait for validator activation")
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}
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}
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}
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func initializeValidatorAndGetHeadSlot(ctx context.Context, v iface.Validator) (primitives.Slot, error) {
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ticker := time.NewTicker(backOffPeriod)
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defer ticker.Stop()
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var headSlot primitives.Slot
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firstTime := true
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for {
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if !firstTime {
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if ctx.Err() != nil {
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log.Info("Context canceled, stopping validator")
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return headSlot, errors.New("context canceled")
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}
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<-ticker.C
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} else {
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firstTime = false
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}
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err := v.WaitForChainStart(ctx)
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if isConnectionError(err) {
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log.WithError(err).Warn("Could not determine if beacon chain started")
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continue
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}
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if err != nil {
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log.WithError(err).Fatal("Could not determine if beacon chain started")
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}
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err = v.WaitForKeymanagerInitialization(ctx)
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if err != nil {
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// log.Fatal will prevent defer from being called
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v.Done()
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log.WithError(err).Fatal("Wallet is not ready")
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}
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err = v.WaitForSync(ctx)
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if isConnectionError(err) {
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log.WithError(err).Warn("Could not determine if beacon chain started")
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continue
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}
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if err != nil {
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log.WithError(err).Fatal("Could not determine if beacon node synced")
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}
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err = v.WaitForActivation(ctx, nil /* accountsChangedChan */)
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if err != nil {
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log.WithError(err).Fatal("Could not wait for validator activation")
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}
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headSlot, err = v.CanonicalHeadSlot(ctx)
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if isConnectionError(err) {
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log.WithError(err).Warn("Could not get current canonical head slot")
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continue
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}
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if err != nil {
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log.WithError(err).Fatal("Could not get current canonical head slot")
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}
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err = v.CheckDoppelGanger(ctx)
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if isConnectionError(err) {
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log.WithError(err).Warn("Could not wait for checking doppelganger")
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continue
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}
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if err != nil {
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log.WithError(err).Fatal("Could not succeed with doppelganger check")
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}
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break
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}
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return headSlot, nil
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}
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func performRoles(slotCtx context.Context, allRoles map[[48]byte][]iface.ValidatorRole, v iface.Validator, slot primitives.Slot, wg *sync.WaitGroup, span *trace.Span) {
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for pubKey, roles := range allRoles {
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wg.Add(len(roles))
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for _, role := range roles {
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go func(role iface.ValidatorRole, pubKey [fieldparams.BLSPubkeyLength]byte) {
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defer wg.Done()
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switch role {
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case iface.RoleAttester:
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v.SubmitAttestation(slotCtx, slot, pubKey)
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case iface.RoleProposer:
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v.ProposeBlock(slotCtx, slot, pubKey)
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case iface.RoleAggregator:
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v.SubmitAggregateAndProof(slotCtx, slot, pubKey)
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case iface.RoleSyncCommittee:
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v.SubmitSyncCommitteeMessage(slotCtx, slot, pubKey)
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case iface.RoleSyncCommitteeAggregator:
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v.SubmitSignedContributionAndProof(slotCtx, slot, pubKey)
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case iface.RoleUnknown:
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log.WithField("pubKey", fmt.Sprintf("%#x", bytesutil.Trunc(pubKey[:]))).Trace("No active roles, doing nothing")
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default:
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log.Warnf("Unhandled role %v", role)
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}
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}(role, pubKey)
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}
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}
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// Wait for all processes to complete, then report span complete.
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go func() {
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wg.Wait()
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defer span.End()
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defer func() {
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if err := recover(); err != nil { // catch any panic in logging
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log.WithField("err", err).
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Error("Panic occurred when logging validator report. This" +
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" should never happen! Please file a report at github.com/prysmaticlabs/prysm/issues/new")
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}
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}()
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// Log this client performance in the previous epoch
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v.LogAttestationsSubmitted()
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v.LogSyncCommitteeMessagesSubmitted()
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if err := v.LogValidatorGainsAndLosses(slotCtx, slot); err != nil {
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log.WithError(err).Error("Could not report validator's rewards/penalties")
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}
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}()
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}
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func isConnectionError(err error) bool {
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return err != nil && errors.Is(err, iface.ErrConnectionIssue)
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}
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func handleAssignmentError(err error, slot primitives.Slot) {
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if errors.Is(err, ErrValidatorsAllExited) {
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log.Warn(ErrValidatorsAllExited)
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} else if errCode, ok := status.FromError(err); ok && errCode.Code() == codes.NotFound {
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log.WithField(
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"epoch", slot/params.BeaconConfig().SlotsPerEpoch,
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).Warn("Validator not yet assigned to epoch")
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} else {
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log.WithField("error", err).Error("Failed to update assignments")
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}
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}
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