39 lines
1.0 KiB
Go
39 lines
1.0 KiB
Go
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package rpc
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import (
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"sync"
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"github.com/ethereum/go-ethereum/common"
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)
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// AddrLocker is a mutex structure used to avoid querying outdated account data
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type AddrLocker struct {
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mu sync.Mutex
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locks map[common.Address]*sync.Mutex
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}
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// lock returns the lock of the given address.
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func (l *AddrLocker) lock(address common.Address) *sync.Mutex {
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l.mu.Lock()
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defer l.mu.Unlock()
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if l.locks == nil {
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l.locks = make(map[common.Address]*sync.Mutex)
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}
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if _, ok := l.locks[address]; !ok {
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l.locks[address] = new(sync.Mutex)
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}
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return l.locks[address]
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}
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// LockAddr locks an account's mutex. This is used to prevent another tx getting the
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// same nonce until the lock is released. The mutex prevents the (an identical nonce) from
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// being read again during the time that the first transaction is being signed.
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func (l *AddrLocker) LockAddr(address common.Address) {
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l.lock(address).Lock()
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}
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// UnlockAddr unlocks the mutex of the given account.
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func (l *AddrLocker) UnlockAddr(address common.Address) {
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l.lock(address).Unlock()
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}
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