85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
package state
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import "sync"
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type account struct {
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stateObject *StateObject
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nstart uint64
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nonces []bool
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}
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type ManagedState struct {
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*StateDB
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mu sync.RWMutex
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accounts map[string]*account
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}
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func ManageState(statedb *StateDB) *ManagedState {
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return &ManagedState{
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StateDB: statedb,
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accounts: make(map[string]*account),
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}
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}
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func (ms *ManagedState) SetState(statedb *StateDB) {
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ms.mu.Lock()
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defer ms.mu.Unlock()
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ms.StateDB = statedb
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}
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func (ms *ManagedState) RemoveNonce(addr []byte, n uint64) {
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if ms.hasAccount(addr) {
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ms.mu.Lock()
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defer ms.mu.Unlock()
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account := ms.getAccount(addr)
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if n-account.nstart <= uint64(len(account.nonces)) {
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reslice := make([]bool, n-account.nstart)
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copy(reslice, account.nonces[:n-account.nstart])
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account.nonces = reslice
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}
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}
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}
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func (ms *ManagedState) NewNonce(addr []byte) uint64 {
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ms.mu.RLock()
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defer ms.mu.RUnlock()
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account := ms.getAccount(addr)
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for i, nonce := range account.nonces {
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if !nonce {
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return account.nstart + uint64(i)
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}
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}
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account.nonces = append(account.nonces, true)
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return uint64(len(account.nonces)) + account.nstart
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}
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func (ms *ManagedState) hasAccount(addr []byte) bool {
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_, ok := ms.accounts[string(addr)]
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return ok
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}
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func (ms *ManagedState) getAccount(addr []byte) *account {
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if account, ok := ms.accounts[string(addr)]; !ok {
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so := ms.GetOrNewStateObject(addr)
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ms.accounts[string(addr)] = newAccount(so)
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} else {
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// Always make sure the state account nonce isn't actually higher
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// than the tracked one.
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so := ms.StateDB.GetStateObject(addr)
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if so != nil && uint64(len(account.nonces))+account.nstart < so.nonce {
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ms.accounts[string(addr)] = newAccount(so)
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}
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}
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return ms.accounts[string(addr)]
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}
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func newAccount(so *StateObject) *account {
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return &account{so, so.nonce - 1, nil}
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}
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