prysm-pulse/slasher/cache/highest_attestation_cache.go
Alon Muroch a04b7c2e4f
Slasher highest source target (#7604)
* WIP - slasher highest attestation start

* fixed previous

* highest source and target

* highest attestation cache

* cleanup

* persist + fixes

* PR fixes and cleanup

* slashing proto

* highest att. api

* cleanup + tests

* increased highest att. cache to 300K

* removed highest att. api (for a separate PR)

* fixed linting

* bazel build fix

* highest att. kv test

* slasher highest att. test + purge + fix on eviction persist performance

* cleanup + linting

* linting + test fixes

* bazel gazelle run

* PR fixes

* run goimports

* go mod tidy

* ineffectual assignment fix

* run gazelle

* bazel gazelle run

* test fixes

* linter fix

* Apply suggestions from code review

Co-authored-by: Shay Zluf <thezluf@gmail.com>

* goimports run

* cache tests

* A bunch of small fixes

* gazelle fix + gofmt

* merge fixes

* kv ordering fix

* small typos and text fixes

* capital letter fix

Co-authored-by: Shay Zluf <thezluf@gmail.com>
2020-10-26 14:15:42 +02:00

74 lines
2.2 KiB
Go

package cache
import (
lru "github.com/hashicorp/golang-lru"
slashpb "github.com/prysmaticlabs/prysm/proto/slashing"
log "github.com/sirupsen/logrus"
)
var (
// highestAttCacheSize defines the max number of sets of highest attestation in cache.
highestAttCacheSize = 3000
)
// HighestAttestationCache is used to store per validator id highest attestation in cache.
type HighestAttestationCache struct {
cache *lru.Cache
}
// NewHighestAttestationCache initializes the cache.
func NewHighestAttestationCache(size int, onEvicted func(key interface{}, value interface{})) (*HighestAttestationCache, error) {
if size != 0 {
highestAttCacheSize = size
}
cache, err := lru.NewWithEvict(highestAttCacheSize, onEvicted)
if err != nil {
return nil, err
}
return &HighestAttestationCache{cache: cache}, nil
}
// Get returns an ok bool and the cached value for the requested validator id key, if any.
func (c *HighestAttestationCache) Get(setKey uint64) (map[uint64]*slashpb.HighestAttestation, bool) {
item, exists := c.cache.Get(setKey)
if exists && item != nil {
return item.(map[uint64]*slashpb.HighestAttestation), true
}
return nil, false
}
// Set the response in the cache.
func (c *HighestAttestationCache) Set(setKey uint64, highest *slashpb.HighestAttestation) {
set, ok := c.Get(setKey)
if ok {
set[highest.ValidatorId] = highest
} else {
set = map[uint64]*slashpb.HighestAttestation{
highest.ValidatorId: highest,
}
c.cache.Add(setKey, set)
}
}
// Delete removes a validator id from the cache and returns if it existed or not.
// Performs the onEviction function before removal.
func (c *HighestAttestationCache) Delete(setKey uint64) bool {
return c.cache.Remove(setKey)
}
// Has returns true if the key exists in the cache.
func (c *HighestAttestationCache) Has(setKey uint64) bool {
return c.cache.Contains(setKey)
}
// Clear removes all keys from the ValidatorCache.
func (c *HighestAttestationCache) Clear() {
c.cache.Purge()
}
// Purge removes all keys from cache and evicts all current data.
func (c *HighestAttestationCache) Purge() {
log.Info("Saving all highest attestation cache data to DB, please wait for completion.")
c.cache.Purge()
}