proxyd: emit event on consensus broken
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21284bd651
commit
e025bcc4b4
@ -12,6 +12,7 @@ import (
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type Cache interface {
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Get(ctx context.Context, key string) (string, error)
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Put(ctx context.Context, key string, value string) error
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Clear(ctx context.Context) error
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}
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const (
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@ -42,6 +43,11 @@ func (c *cache) Put(ctx context.Context, key string, value string) error {
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return nil
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}
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func (c *cache) Clear(ctx context.Context) error {
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c.lru.Purge()
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return nil
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}
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type redisCache struct {
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rdb *redis.Client
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}
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@ -75,6 +81,29 @@ func (c *redisCache) Put(ctx context.Context, key string, value string) error {
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return err
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}
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func (c *redisCache) Clear(ctx context.Context) error {
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patterns := []string{"lvc:*", "method:*"}
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for _, p := range patterns {
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scmd := c.rdb.Keys(ctx, p)
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err := scmd.Err()
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if err != nil {
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RecordRedisError("CacheClear")
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return err
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}
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keys, _ := scmd.Result()
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icmd := c.rdb.Del(ctx, keys...)
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err = icmd.Err()
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if err != nil {
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RecordRedisError("CacheClear")
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return err
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}
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}
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return nil
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}
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type cacheWithCompression struct {
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cache Cache
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}
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@ -103,6 +132,10 @@ func (c *cacheWithCompression) Put(ctx context.Context, key string, value string
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return c.cache.Put(ctx, key, string(encodedVal))
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}
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func (c *cacheWithCompression) Clear(ctx context.Context) error {
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return c.cache.Clear(ctx)
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}
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type GetLatestBlockNumFn func(ctx context.Context) (uint64, error)
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type GetLatestGasPriceFn func(ctx context.Context) (uint64, error)
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@ -17,11 +17,14 @@ const (
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PollerInterval = 1 * time.Second
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)
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type OnConsensusBroken func()
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// ConsensusPoller checks the consensus state for each member of a BackendGroup
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// resolves the highest common block for multiple nodes, and reconciles the consensus
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// in case of block hash divergence to minimize re-orgs
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type ConsensusPoller struct {
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cancelFunc context.CancelFunc
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listeners []OnConsensusBroken
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backendGroup *BackendGroup
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backendState map[*Backend]*backendState
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@ -149,6 +152,16 @@ func WithAsyncHandler(asyncHandler ConsensusAsyncHandler) ConsensusOpt {
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}
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}
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func WithListener(listener OnConsensusBroken) ConsensusOpt {
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return func(cp *ConsensusPoller) {
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cp.AddListener(listener)
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}
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}
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func (cp *ConsensusPoller) AddListener(listener OnConsensusBroken) {
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cp.listeners = append(cp.listeners, listener)
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}
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func WithBanPeriod(banPeriod time.Duration) ConsensusOpt {
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return func(cp *ConsensusPoller) {
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cp.banPeriod = banPeriod
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@ -349,6 +362,7 @@ func (cp *ConsensusPoller) UpdateBackendGroupConsensus(ctx context.Context) {
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- with minimum peer count
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- updated recently
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- not lagging
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- in sync
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*/
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peerCount, latestBlockNumber, _, lastUpdate, bannedUntil := cp.getBackendState(be)
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@ -392,7 +406,9 @@ func (cp *ConsensusPoller) UpdateBackendGroupConsensus(ctx context.Context) {
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}
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if broken {
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// propagate event to other interested parts, such as cache invalidator
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for _, l := range cp.listeners {
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l()
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}
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log.Info("consensus broken", "currentConsensusBlockNumber", currentConsensusBlockNumber, "proposedBlock", proposedBlock, "proposedBlockHash", proposedBlockHash)
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}
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@ -286,6 +286,11 @@ func TestConsensus(t *testing.T) {
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h2.ResetOverrides()
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bg.Consensus.Unban()
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listenerCalled := false
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bg.Consensus.AddListener(func() {
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listenerCalled = true
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})
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for _, be := range bg.Backends {
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bg.Consensus.UpdateBackend(ctx, be)
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}
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@ -331,7 +336,7 @@ func TestConsensus(t *testing.T) {
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// should resolve to 0x1, since 0x2 is out of consensus at the moment
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require.Equal(t, "0x1", bg.Consensus.GetConsensusBlockNumber().String())
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// later, when impl events, listen to broken consensus event
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require.True(t, listenerCalled)
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})
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t.Run("broken consensus with depth 2", func(t *testing.T) {
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