gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

consensus/clique: cache block signatures for fast checks

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

18
consensus/clique/clique.go
View File

@ -44,7 +44,7 @@ import (
const (
checkpointInterval = 1024 // Number of blocks after which to save the vote snapshot to the database
inmemorySnapshots = 128 // Number of recent vote snapshots to keep in memory
inmemorySignatures = 1024 // Number of recent blocks to keep in memory
inmemorySignatures = 4096 // Number of recent block signatures to keep in memory
wiggleTime = 500 * time.Millisecond // Random delay (per signer) to allow concurrent signers
)
@ -162,7 +162,12 @@ func sigHash(header *types.Header) (hash common.Hash) {
}
// ecrecover extracts the Ethereum account address from a signed header.
func ecrecover(header *types.Header) (common.Address, error) {
func ecrecover(header *types.Header, sigcache *lru.ARCCache) (common.Address, error) {
// If the signature's already cached, return that
hash := header.Hash()
if address, known := sigcache.Get(hash); known {
return address.(common.Address), nil
}
// Retrieve the signature from the header extra-data
if len(header.Extra) < extraSeal {
return common.Address{}, errMissingSignature
@ -177,6 +182,7 @@ func ecrecover(header *types.Header) (common.Address, error) {
var signer common.Address
copy(signer[:], crypto.Keccak256(pubkey[1:])[12:])
sigcache.Add(hash, signer)
return signer, nil
}
@ -223,7 +229,7 @@ func New(config *params.CliqueConfig, db ethdb.Database) *Clique {
// Author implements consensus.Engine, returning the Ethereum address recovered
// from the signature in the header's extra-data section.
func (c *Clique) Author(header *types.Header) (common.Address, error) {
return ecrecover(header)
return ecrecover(header, c.signatures)
}
// VerifyHeader checks whether a header conforms to the consensus rules.
@ -369,7 +375,7 @@ func (c *Clique) snapshot(chain consensus.ChainReader, number uint64, hash commo
}
// If an on-disk checkpoint snapshot can be found, use that
if number%checkpointInterval == 0 {
if s, err := loadSnapshot(c.config, c.db, hash); err == nil {
if s, err := loadSnapshot(c.config, c.signatures, c.db, hash); err == nil {
log.Trace("Loaded voting snapshot form disk", "number", number, "hash", hash)
snap = s
break
@ -385,7 +391,7 @@ func (c *Clique) snapshot(chain consensus.ChainReader, number uint64, hash commo
for i := 0; i < len(signers); i++ {
copy(signers[i][:], genesis.Extra[extraVanity+i*common.AddressLength:])
}
snap = newSnapshot(c.config, 0, genesis.Hash(), signers)
snap = newSnapshot(c.config, c.signatures, 0, genesis.Hash(), signers)
if err := snap.store(c.db); err != nil {
return nil, err
}
@ -464,7 +470,7 @@ func (c *Clique) verifySeal(chain consensus.ChainReader, header *types.Header, p
c.recents.Add(snap.Hash, snap)
// Resolve the authorization key and check against signers
signer, err := ecrecover(header)
signer, err := ecrecover(header, c.signatures)
if err != nil {
return err
}