mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-22 11:41:19 +00:00
106 lines
3.5 KiB
Go
106 lines
3.5 KiB
Go
// Copyright 2018 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package core
|
|
|
|
import (
|
|
"runtime"
|
|
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
)
|
|
|
|
// senderCacher is a concurrent transaction sender recoverer anc cacher.
|
|
var senderCacher = newTxSenderCacher(runtime.NumCPU())
|
|
|
|
// txSenderCacherRequest is a request for recovering transaction senders with a
|
|
// specific signature scheme and caching it into the transactions themselves.
|
|
//
|
|
// The inc field defines the number of transactions to skip after each recovery,
|
|
// which is used to feed the same underlying input array to different threads but
|
|
// ensure they process the early transactions fast.
|
|
type txSenderCacherRequest struct {
|
|
signer types.Signer
|
|
txs []*types.Transaction
|
|
inc int
|
|
}
|
|
|
|
// txSenderCacher is a helper structure to concurrently ecrecover transaction
|
|
// senders from digital signatures on background threads.
|
|
type txSenderCacher struct {
|
|
threads int
|
|
tasks chan *txSenderCacherRequest
|
|
}
|
|
|
|
// newTxSenderCacher creates a new transaction sender background cacher and starts
|
|
// as many processing goroutines as allowed by the GOMAXPROCS on construction.
|
|
func newTxSenderCacher(threads int) *txSenderCacher {
|
|
cacher := &txSenderCacher{
|
|
tasks: make(chan *txSenderCacherRequest, threads),
|
|
threads: threads,
|
|
}
|
|
for i := 0; i < threads; i++ {
|
|
go cacher.cache()
|
|
}
|
|
return cacher
|
|
}
|
|
|
|
// cache is an infinite loop, caching transaction senders from various forms of
|
|
// data structures.
|
|
func (cacher *txSenderCacher) cache() {
|
|
for task := range cacher.tasks {
|
|
for i := 0; i < len(task.txs); i += task.inc {
|
|
types.Sender(task.signer, task.txs[i])
|
|
}
|
|
}
|
|
}
|
|
|
|
// recover recovers the senders from a batch of transactions and caches them
|
|
// back into the same data structures. There is no validation being done, nor
|
|
// any reaction to invalid signatures. That is up to calling code later.
|
|
func (cacher *txSenderCacher) recover(signer types.Signer, txs []*types.Transaction) {
|
|
// If there's nothing to recover, abort
|
|
if len(txs) == 0 {
|
|
return
|
|
}
|
|
// Ensure we have meaningful task sizes and schedule the recoveries
|
|
tasks := cacher.threads
|
|
if len(txs) < tasks*4 {
|
|
tasks = (len(txs) + 3) / 4
|
|
}
|
|
for i := 0; i < tasks; i++ {
|
|
cacher.tasks <- &txSenderCacherRequest{
|
|
signer: signer,
|
|
txs: txs[i:],
|
|
inc: tasks,
|
|
}
|
|
}
|
|
}
|
|
|
|
// recoverFromBlocks recovers the senders from a batch of blocks and caches them
|
|
// back into the same data structures. There is no validation being done, nor
|
|
// any reaction to invalid signatures. That is up to calling code later.
|
|
func (cacher *txSenderCacher) recoverFromBlocks(signer types.Signer, blocks []*types.Block) {
|
|
count := 0
|
|
for _, block := range blocks {
|
|
count += len(block.Transactions())
|
|
}
|
|
txs := make([]*types.Transaction, 0, count)
|
|
for _, block := range blocks {
|
|
txs = append(txs, block.Transactions()...)
|
|
}
|
|
cacher.recover(signer, txs)
|
|
}
|