laconicd/rpc/addrlock.go
Austin Abell 28aaba0695
Implement eth_sendTransaction (#104)
* Set up framework for sending transaction with correct args and nonce mutex locking

* Set up printing ethereum address through emintkeys and getting chainid from flags

* Implemented defaults for eth_sendTransaction

* Fix bug with no data provided

* Updated comments and error, as well as RLP encoded tx bytes for return instead of amino encoded
2019-09-20 09:30:20 -04:00

39 lines
1.0 KiB
Go

package rpc
import (
"sync"
"github.com/ethereum/go-ethereum/common"
)
// AddrLocker is a mutex structure used to avoid querying outdated account data
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()
}