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consensus/clique: cache block signatures for fast checks

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This commit is contained in:
Péter Szilágyi
2017-05-29 22:05:30 +03:00
parent dd06c85843
commit 309da541de
2 changed files with 34 additions and 23 deletions
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39
consensus/clique/snapshot.go
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@ -24,6 +24,7 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/params"
lru "github.com/hashicorp/golang-lru"
)
// Vote represents a single vote that an authorized signer made to modify the
@ -44,7 +45,8 @@ type Tally struct {
// Snapshot is the state of the authorization voting at a given point in time.
type Snapshot struct {
config *params.CliqueConfig // Consensus engine parameters to fine tune behavior
config *params.CliqueConfig // Consensus engine parameters to fine tune behavior
sigcache *lru.ARCCache // Cache of recent block signatures to speed up ecrecover
Number uint64 `json:"number"` // Block number where the snapshot was created
Hash common.Hash `json:"hash"` // Block hash where the snapshot was created
@ -57,14 +59,15 @@ type Snapshot struct {
// newSnapshot create a new snapshot with the specified startup parameters. This
// method does not initialize the set of recent signers, so only ever use if for
// the genesis block.
func newSnapshot(config *params.CliqueConfig, number uint64, hash common.Hash, signers []common.Address) *Snapshot {
func newSnapshot(config *params.CliqueConfig, sigcache *lru.ARCCache, number uint64, hash common.Hash, signers []common.Address) *Snapshot {
snap := &Snapshot{
config: config,
Number: number,
Hash: hash,
Signers: make(map[common.Address]struct{}),
Recents: make(map[uint64]common.Address),
Tally: make(map[common.Address]Tally),
config: config,
sigcache: sigcache,
Number: number,
Hash: hash,
Signers: make(map[common.Address]struct{}),
Recents: make(map[uint64]common.Address),
Tally: make(map[common.Address]Tally),
}
for _, signer := range signers {
snap.Signers[signer] = struct{}{}
@ -73,7 +76,7 @@ func newSnapshot(config *params.CliqueConfig, number uint64, hash common.Hash, s
}
// loadSnapshot loads an existing snapshot from the database.
func loadSnapshot(config *params.CliqueConfig, db ethdb.Database, hash common.Hash) (*Snapshot, error) {
func loadSnapshot(config *params.CliqueConfig, sigcache *lru.ARCCache, db ethdb.Database, hash common.Hash) (*Snapshot, error) {
blob, err := db.Get(append([]byte("clique-"), hash[:]...))
if err != nil {
return nil, err
@ -83,6 +86,7 @@ func loadSnapshot(config *params.CliqueConfig, db ethdb.Database, hash common.Ha
return nil, err
}
snap.config = config
snap.sigcache = sigcache
return snap, nil
}
@ -99,13 +103,14 @@ func (s *Snapshot) store(db ethdb.Database) error {
// copy creates a deep copy of the snapshot, though not the individual votes.
func (s *Snapshot) copy() *Snapshot {
cpy := &Snapshot{
config: s.config,
Number: s.Number,
Hash: s.Hash,
Signers: make(map[common.Address]struct{}),
Recents: make(map[uint64]common.Address),
Votes: make([]*Vote, len(s.Votes)),
Tally: make(map[common.Address]Tally),
config: s.config,
sigcache: s.sigcache,
Number: s.Number,
Hash: s.Hash,
Signers: make(map[common.Address]struct{}),
Recents: make(map[uint64]common.Address),
Votes: make([]*Vote, len(s.Votes)),
Tally: make(map[common.Address]Tally),
}
for signer := range s.Signers {
cpy.Signers[signer] = struct{}{}
@ -190,7 +195,7 @@ func (s *Snapshot) apply(headers []*types.Header) (*Snapshot, error) {
delete(snap.Recents, number-limit)
}
// Resolve the authorization key and check against signers
signer, err := ecrecover(header)
signer, err := ecrecover(header, s.sigcache)
if err != nil {
return nil, err
}