mirror of https://github.com/poanetwork/quorum.git
226 lines
5.0 KiB
Go
226 lines
5.0 KiB
Go
package ethchain
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import (
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"github.com/ethereum/eth-go/ethcrypto"
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"github.com/ethereum/eth-go/ethtrie"
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"github.com/ethereum/eth-go/ethutil"
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"math/big"
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)
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// States within the ethereum protocol are used to store anything
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// within the merkle trie. States take care of caching and storing
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// nested states. It's the general query interface to retrieve:
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// * Contracts
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// * Accounts
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type State struct {
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// The trie for this structure
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trie *ethtrie.Trie
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stateObjects map[string]*StateObject
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manifest *Manifest
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}
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// Create a new state from a given trie
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func NewState(trie *ethtrie.Trie) *State {
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return &State{trie: trie, stateObjects: make(map[string]*StateObject), manifest: NewManifest()}
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}
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// Resets the trie and all siblings
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func (s *State) Reset() {
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s.trie.Undo()
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// Reset all nested states
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for _, stateObject := range s.stateObjects {
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if stateObject.state == nil {
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continue
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}
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stateObject.state.Reset()
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}
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s.Empty()
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}
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// Syncs the trie and all siblings
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func (s *State) Sync() {
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// Sync all nested states
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for _, stateObject := range s.stateObjects {
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s.UpdateStateObject(stateObject)
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if stateObject.state == nil {
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continue
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}
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stateObject.state.Sync()
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}
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s.trie.Sync()
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s.Empty()
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}
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func (self *State) Empty() {
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self.stateObjects = make(map[string]*StateObject)
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}
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func (self *State) Update() {
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for _, stateObject := range self.stateObjects {
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if stateObject.remove {
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self.DeleteStateObject(stateObject)
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} else {
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self.UpdateStateObject(stateObject)
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}
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}
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// FIXME trie delete is broken
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valid, t2 := ethtrie.ParanoiaCheck(self.trie)
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if !valid {
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self.trie = t2
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}
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}
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// Purges the current trie.
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func (s *State) Purge() int {
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return s.trie.NewIterator().Purge()
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}
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func (s *State) EachStorage(cb ethtrie.EachCallback) {
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it := s.trie.NewIterator()
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it.Each(cb)
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}
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func (self *State) ResetStateObject(stateObject *StateObject) {
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delete(self.stateObjects, string(stateObject.Address()))
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stateObject.state.Reset()
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}
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func (self *State) UpdateStateObject(stateObject *StateObject) {
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addr := stateObject.Address()
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ethutil.Config.Db.Put(ethcrypto.Sha3Bin(stateObject.Script()), stateObject.Script())
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self.trie.Update(string(addr), string(stateObject.RlpEncode()))
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self.manifest.AddObjectChange(stateObject)
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}
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func (self *State) DeleteStateObject(stateObject *StateObject) {
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self.trie.Delete(string(stateObject.Address()))
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delete(self.stateObjects, string(stateObject.Address()))
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}
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func (self *State) GetStateObject(addr []byte) *StateObject {
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stateObject := self.stateObjects[string(addr)]
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if stateObject != nil {
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return stateObject
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}
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data := self.trie.Get(string(addr))
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if len(data) == 0 {
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return nil
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}
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stateObject = NewStateObjectFromBytes(addr, []byte(data))
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self.stateObjects[string(addr)] = stateObject
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return stateObject
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}
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func (self *State) GetOrNewStateObject(addr []byte) *StateObject {
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stateObject := self.GetStateObject(addr)
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if stateObject == nil {
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stateObject = self.NewStateObject(addr)
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}
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return stateObject
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}
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func (self *State) NewStateObject(addr []byte) *StateObject {
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statelogger.Infof("(+) %x\n", addr)
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stateObject := NewStateObject(addr)
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self.stateObjects[string(addr)] = stateObject
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return stateObject
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}
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func (self *State) GetAccount(addr []byte) *StateObject {
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return self.GetOrNewStateObject(addr)
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}
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func (s *State) Cmp(other *State) bool {
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return s.trie.Cmp(other.trie)
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}
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func (self *State) Copy() *State {
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if self.trie != nil {
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state := NewState(self.trie.Copy())
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for k, stateObject := range self.stateObjects {
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state.stateObjects[k] = stateObject.Copy()
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}
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return state
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}
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return nil
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}
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func (self *State) Set(state *State) {
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if state == nil {
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panic("Tried setting 'state' to nil through 'Set'")
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}
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self.trie = state.trie
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self.stateObjects = state.stateObjects
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//*self = *state
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}
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func (s *State) Put(key, object []byte) {
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s.trie.Update(string(key), string(object))
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}
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func (s *State) Root() interface{} {
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return s.trie.Root
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}
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// Object manifest
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//
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// The object manifest is used to keep changes to the state so we can keep track of the changes
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// that occurred during a state transitioning phase.
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type Manifest struct {
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// XXX These will be handy in the future. Not important for now.
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objectAddresses map[string]bool
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storageAddresses map[string]map[string]bool
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objectChanges map[string]*StateObject
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storageChanges map[string]map[string]*big.Int
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}
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func NewManifest() *Manifest {
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m := &Manifest{objectAddresses: make(map[string]bool), storageAddresses: make(map[string]map[string]bool)}
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m.Reset()
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return m
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}
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func (m *Manifest) Reset() {
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m.objectChanges = make(map[string]*StateObject)
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m.storageChanges = make(map[string]map[string]*big.Int)
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}
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func (m *Manifest) AddObjectChange(stateObject *StateObject) {
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m.objectChanges[string(stateObject.Address())] = stateObject
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}
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func (m *Manifest) AddStorageChange(stateObject *StateObject, storageAddr []byte, storage *big.Int) {
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if m.storageChanges[string(stateObject.Address())] == nil {
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m.storageChanges[string(stateObject.Address())] = make(map[string]*big.Int)
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}
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m.storageChanges[string(stateObject.Address())][string(storageAddr)] = storage
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}
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