package ethstate import ( "fmt" "github.com/ethereum/eth-go/ethcrypto" "github.com/ethereum/eth-go/ethtrie" "github.com/ethereum/eth-go/ethutil" "math/big" ) type Code []byte func (self Code) String() string { return "" //strings.Join(Disassemble(self), " ") } type Storage map[string]*ethutil.Value func (self Storage) Copy() Storage { cpy := make(Storage) for key, value := range self { // XXX Do we need a 'value' copy or is this sufficient? cpy[key] = value } return cpy } type StateObject struct { // Address of the object address []byte // Shared attributes Amount *big.Int CodeHash []byte Nonce uint64 // Contract related attributes state *State Code Code initCode Code storage Storage // Total gas pool is the total amount of gas currently // left if this object is the coinbase. Gas is directly // purchased of the coinbase. gasPool *big.Int // Mark for deletion // When an object is marked for deletion it will be delete from the trie // during the "update" phase of the state transition remove bool } func (self *StateObject) Reset() { self.storage = make(Storage) self.state.Reset() } /* // Converts an transaction in to a state object func MakeContract(tx *Transaction, state *State) *StateObject { // Create contract if there's no recipient if tx.IsContract() { addr := tx.CreationAddress() contract := state.NewStateObject(addr) contract.initCode = tx.Data contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, "")) return contract } return nil } */ func NewStateObject(addr []byte) *StateObject { // This to ensure that it has 20 bytes (and not 0 bytes), thus left or right pad doesn't matter. address := ethutil.Address(addr) object := &StateObject{address: address, Amount: new(big.Int), gasPool: new(big.Int)} object.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, "")) object.storage = make(Storage) object.gasPool = new(big.Int) return object } func NewContract(address []byte, Amount *big.Int, root []byte) *StateObject { contract := NewStateObject(address) contract.Amount = Amount contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, string(root))) return contract } func NewStateObjectFromBytes(address, data []byte) *StateObject { object := &StateObject{address: address} object.RlpDecode(data) return object } func (self *StateObject) MarkForDeletion() { self.remove = true statelogger.DebugDetailf("%x: #%d %v (deletion)\n", self.Address(), self.Nonce, self.Amount) } func (c *StateObject) GetAddr(addr []byte) *ethutil.Value { return ethutil.NewValueFromBytes([]byte(c.state.trie.Get(string(addr)))) } func (c *StateObject) SetAddr(addr []byte, value interface{}) { c.state.trie.Update(string(addr), string(ethutil.NewValue(value).Encode())) } func (self *StateObject) GetStorage(key *big.Int) *ethutil.Value { return self.getStorage(key.Bytes()) } func (self *StateObject) SetStorage(key *big.Int, value *ethutil.Value) { self.setStorage(key.Bytes(), value) } func (self *StateObject) getStorage(k []byte) *ethutil.Value { key := ethutil.LeftPadBytes(k, 32) value := self.storage[string(key)] if value == nil { value = self.GetAddr(key) if !value.IsNil() { self.storage[string(key)] = value } } return value //return self.GetAddr(key) } func (self *StateObject) setStorage(k []byte, value *ethutil.Value) { key := ethutil.LeftPadBytes(k, 32) self.storage[string(key)] = value.Copy() } // Iterate over each storage address and yield callback func (self *StateObject) EachStorage(cb ethtrie.EachCallback) { // First loop over the uncommit/cached values in storage for key, value := range self.storage { // XXX Most iterators Fns as it stands require encoded values encoded := ethutil.NewValue(value.Encode()) cb(key, encoded) } it := self.state.trie.NewIterator() it.Each(func(key string, value *ethutil.Value) { // If it's cached don't call the callback. if self.storage[key] == nil { cb(key, value) } }) } func (self *StateObject) Sync() { for key, value := range self.storage { if value.Len() == 0 { // value.BigInt().Cmp(ethutil.Big0) == 0 { //data := self.getStorage([]byte(key)) //fmt.Printf("deleting %x %x 0x%x\n", self.Address(), []byte(key), data) self.state.trie.Delete(string(key)) continue } self.SetAddr([]byte(key), value) } valid, t2 := ethtrie.ParanoiaCheck(self.state.trie) if !valid { statelogger.Infof("Warn: PARANOIA: Different state storage root during copy %x vs %x\n", self.state.trie.Root, t2.Root) self.state.trie = t2 } } func (c *StateObject) GetInstr(pc *big.Int) *ethutil.Value { if int64(len(c.Code)-1) < pc.Int64() { return ethutil.NewValue(0) } return ethutil.NewValueFromBytes([]byte{c.Code[pc.Int64()]}) } func (c *StateObject) AddAmount(amount *big.Int) { c.SetAmount(new(big.Int).Add(c.Amount, amount)) statelogger.Debugf("%x: #%d %v (+ %v)\n", c.Address(), c.Nonce, c.Amount, amount) } func (c *StateObject) SubAmount(amount *big.Int) { c.SetAmount(new(big.Int).Sub(c.Amount, amount)) statelogger.Debugf("%x: #%d %v (- %v)\n", c.Address(), c.Nonce, c.Amount, amount) } func (c *StateObject) SetAmount(amount *big.Int) { c.Amount = amount } // // Gas setters and getters // // Return the gas back to the origin. Used by the Virtual machine or Closures func (c *StateObject) ReturnGas(gas, price *big.Int) {} func (c *StateObject) ConvertGas(gas, price *big.Int) error { total := new(big.Int).Mul(gas, price) if total.Cmp(c.Amount) > 0 { return fmt.Errorf("insufficient amount: %v, %v", c.Amount, total) } c.SubAmount(total) return nil } func (self *StateObject) SetGasPool(gasLimit *big.Int) { self.gasPool = new(big.Int).Set(gasLimit) statelogger.DebugDetailf("%x: fuel (+ %v)", self.Address(), self.gasPool) } func (self *StateObject) BuyGas(gas, price *big.Int) error { if self.gasPool.Cmp(gas) < 0 { return GasLimitError(self.gasPool, gas) } rGas := new(big.Int).Set(gas) rGas.Mul(rGas, price) self.AddAmount(rGas) return nil } func (self *StateObject) RefundGas(gas, price *big.Int) { self.gasPool.Add(self.gasPool, gas) rGas := new(big.Int).Set(gas) rGas.Mul(rGas, price) self.Amount.Sub(self.Amount, rGas) } func (self *StateObject) Copy() *StateObject { stateObject := NewStateObject(self.Address()) stateObject.Amount.Set(self.Amount) stateObject.CodeHash = ethutil.CopyBytes(self.CodeHash) stateObject.Nonce = self.Nonce if self.state != nil { stateObject.state = self.state.Copy() } stateObject.Code = ethutil.CopyBytes(self.Code) stateObject.initCode = ethutil.CopyBytes(self.initCode) stateObject.storage = self.storage.Copy() stateObject.gasPool.Set(self.gasPool) return stateObject } func (self *StateObject) Set(stateObject *StateObject) { *self = *stateObject } // // Attribute accessors // func (c *StateObject) State() *State { return c.state } func (c *StateObject) N() *big.Int { return big.NewInt(int64(c.Nonce)) } // Returns the address of the contract/account func (c *StateObject) Address() []byte { return c.address } // Returns the initialization Code func (c *StateObject) Init() Code { return c.initCode } // Debug stuff func (self *StateObject) CreateOutputForDiff() { fmt.Printf("%x %x %x %x\n", self.Address(), self.state.Root(), self.Amount.Bytes(), self.Nonce) self.EachStorage(func(addr string, value *ethutil.Value) { fmt.Printf("%x %x\n", addr, value.Bytes()) }) } // // Encoding // // State object encoding methods func (c *StateObject) RlpEncode() []byte { var root interface{} if c.state != nil { root = c.state.trie.Root } else { root = "" } return ethutil.Encode([]interface{}{c.Nonce, c.Amount, root, ethcrypto.Sha3Bin(c.Code)}) } func (c *StateObject) RlpDecode(data []byte) { decoder := ethutil.NewValueFromBytes(data) c.Nonce = decoder.Get(0).Uint() c.Amount = decoder.Get(1).BigInt() c.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface())) c.storage = make(map[string]*ethutil.Value) c.gasPool = new(big.Int) c.CodeHash = decoder.Get(3).Bytes() c.Code, _ = ethutil.Config.Db.Get(c.CodeHash) } // Storage change object. Used by the manifest for notifying changes to // the sub channels. type StorageState struct { StateAddress []byte Address []byte Value *big.Int }