ea11f7dd7a
This prevents concurrent assignment of identical nonces when automatic assignment is used.
54 lines
1.7 KiB
Go
54 lines
1.7 KiB
Go
// Copyright 2015 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 ethapi
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
)
|
|
|
|
type AddrLocker struct {
|
|
mu sync.Mutex
|
|
locks map[common.Address]*sync.Mutex
|
|
}
|
|
|
|
// lock returns the lock of the given address.
|
|
func (l *AddrLocker) lock(address common.Address) *sync.Mutex {
|
|
l.mu.Lock()
|
|
defer l.mu.Unlock()
|
|
if l.locks == nil {
|
|
l.locks = make(map[common.Address]*sync.Mutex)
|
|
}
|
|
if _, ok := l.locks[address]; !ok {
|
|
l.locks[address] = new(sync.Mutex)
|
|
}
|
|
return l.locks[address]
|
|
}
|
|
|
|
// LockAddr locks an account's mutex. This is used to prevent another tx getting the
|
|
// same nonce until the lock is released. The mutex prevents the (an identical nonce) from
|
|
// being read again during the time that the first transaction is being signed.
|
|
func (l *AddrLocker) LockAddr(address common.Address) {
|
|
l.lock(address).Lock()
|
|
}
|
|
|
|
// UnlockAddr unlocks the mutex of the given account.
|
|
func (l *AddrLocker) UnlockAddr(address common.Address) {
|
|
l.lock(address).Unlock()
|
|
}
|