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Added new state object change echanism

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This commit is contained in:
obscuren
2014-04-26 01:47:55 +02:00
parent f3818478e2
commit 0f93da400a
4 changed files with 69 additions and 44 deletions
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33
ethchain/state_manager.go
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@ -50,6 +50,10 @@ type StateManager struct {
// Comparative state it used for comparing and validating end
// results
compState *State
// It's generally know that a map is faster for small lookups than arrays
// we'll eventually have to make a decision if the map grows too large
watchedAddresses map[string]bool
}
func NewStateManager(ethereum EthManager) *StateManager {
@ -60,6 +64,7 @@ func NewStateManager(ethereum EthManager) *StateManager {
Ethereum: ethereum,
stateObjectCache: NewStateObjectCache(),
bc: ethereum.BlockChain(),
watchedAddresses: make(map[string]bool),
}
sm.procState = ethereum.BlockChain().CurrentBlock.State()
return sm
@ -309,18 +314,9 @@ func (sm *StateManager) Stop() {
}
func (sm *StateManager) EvalScript(script []byte, object *StateObject, tx *Transaction, block *Block) {
// Recovering function in case the VM had any errors
/*
defer func() {
if r := recover(); r != nil {
fmt.Println("Recovered from VM execution with err =", r)
}
}()
*/
caller := sm.procState.GetAccount(tx.Sender())
closure := NewClosure(caller, object, script, sm.procState, tx.Gas, tx.GasPrice, tx.Value)
vm := NewVm(sm.procState, RuntimeVars{
vm := NewVm(sm.procState, sm, RuntimeVars{
Origin: caller.Address(),
BlockNumber: block.BlockInfo().Number,
PrevHash: block.PrevHash,
@ -333,5 +329,22 @@ func (sm *StateManager) EvalScript(script []byte, object *StateObject, tx *Trans
// Update the account (refunds)
sm.procState.UpdateStateObject(caller)
sm.Changed(caller)
sm.procState.UpdateStateObject(object)
sm.Changed(object)
}
// Watch a specific address
func (sm *StateManager) Watch(addr []byte) {
if !sm.watchedAddresses[string(addr)] {
sm.watchedAddresses[string(addr)] = true
}
}
// The following objects are used when changing a value and using the "watched" attribute
// to determine whether the reactor should be used to notify any subscribers on the address
func (sm *StateManager) Changed(stateObject *StateObject) {
if sm.watchedAddresses[string(stateObject.Address())] {
sm.Ethereum.Reactor().Post("addressChanged", stateObject)
}
}