package state import ( "bytes" "fmt" "math/big" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/rlp" "github.com/ethereum/go-ethereum/trie" ) type Code []byte func (self Code) String() string { return string(self) //strings.Join(Disassemble(self), " ") } type Storage map[string]*common.Value func (self Storage) String() (str string) { for key, value := range self { str += fmt.Sprintf("%X : %X\n", key, value.Bytes()) } return } 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 { // State database for storing state changes db common.Database // The state object State *StateDB // Address belonging to this account address common.Address // The balance of the account balance *big.Int // The nonce of the account nonce uint64 // The code hash if code is present (i.e. a contract) codeHash []byte // The code for this account code Code // Temporarily initialisation code initCode Code // Cached storage (flushed when updated) storage Storage // Temporary prepaid gas, reward after transition prepaid *big.Int // 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 dirty bool } func (self *StateObject) Reset() { self.storage = make(Storage) self.State.Reset() } func NewStateObject(address common.Address, db common.Database) *StateObject { // This to ensure that it has 20 bytes (and not 0 bytes), thus left or right pad doesn't matter. //address := common.ToAddress(addr) object := &StateObject{db: db, address: address, balance: new(big.Int), gasPool: new(big.Int), dirty: true} object.State = New(nil, db) //New(trie.New(common.Config.Db, "")) object.storage = make(Storage) object.gasPool = new(big.Int) object.prepaid = new(big.Int) return object } func NewStateObjectFromBytes(address common.Address, data []byte, db common.Database) *StateObject { // TODO clean me up var extobject struct { Nonce uint64 Balance *big.Int Root common.Hash CodeHash []byte } err := rlp.Decode(bytes.NewReader(data), &extobject) if err != nil { fmt.Println(err) return nil } object := &StateObject{address: address, db: db} //object.RlpDecode(data) object.nonce = extobject.Nonce object.balance = extobject.Balance object.codeHash = extobject.CodeHash object.State = New(extobject.Root[:], db) object.storage = make(map[string]*common.Value) object.gasPool = new(big.Int) object.prepaid = new(big.Int) object.code, _ = db.Get(extobject.CodeHash) return object } func (self *StateObject) MarkForDeletion() { self.remove = true self.dirty = true statelogger.Debugf("%x: #%d %v X\n", self.Address(), self.nonce, self.balance) } func (c *StateObject) getAddr(addr common.Hash) *common.Value { return common.NewValueFromBytes([]byte(c.State.trie.Get(addr[:]))) } func (c *StateObject) setAddr(addr []byte, value interface{}) { c.State.trie.Update(addr, common.Encode(value)) } func (self *StateObject) GetStorage(key *big.Int) *common.Value { return self.GetState(common.BytesToHash(key.Bytes())) } func (self *StateObject) SetStorage(key *big.Int, value *common.Value) { self.SetState(common.BytesToHash(key.Bytes()), value) } func (self *StateObject) Storage() Storage { return self.storage } func (self *StateObject) GetState(key common.Hash) *common.Value { strkey := key.Str() value := self.storage[strkey] if value == nil { value = self.getAddr(key) if !value.IsNil() { self.storage[strkey] = value } } return value } func (self *StateObject) SetState(k common.Hash, value *common.Value) { self.storage[k.Str()] = value.Copy() self.dirty = true } func (self *StateObject) Sync() { for key, value := range self.storage { if value.Len() == 0 { self.State.trie.Delete([]byte(key)) continue } self.setAddr([]byte(key), value) } self.storage = make(Storage) } func (c *StateObject) GetInstr(pc *big.Int) *common.Value { if int64(len(c.code)-1) < pc.Int64() { return common.NewValue(0) } return common.NewValueFromBytes([]byte{c.code[pc.Int64()]}) } func (c *StateObject) AddBalance(amount *big.Int) { c.SetBalance(new(big.Int).Add(c.balance, amount)) statelogger.Debugf("%x: #%d %v (+ %v)\n", c.Address(), c.nonce, c.balance, amount) } func (c *StateObject) SubBalance(amount *big.Int) { c.SetBalance(new(big.Int).Sub(c.balance, amount)) statelogger.Debugf("%x: #%d %v (- %v)\n", c.Address(), c.nonce, c.balance, amount) } func (c *StateObject) SetBalance(amount *big.Int) { c.balance = amount c.dirty = true } func (c *StateObject) St() Storage { return c.storage } // // 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.balance) > 0 { return fmt.Errorf("insufficient amount: %v, %v", c.balance, total) } c.SubBalance(total) c.dirty = true return nil } func (self *StateObject) SetGasPool(gasLimit *big.Int) { self.gasPool = new(big.Int).Set(gasLimit) statelogger.Debugf("%x: gas (+ %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) } self.gasPool.Sub(self.gasPool, gas) rGas := new(big.Int).Set(gas) rGas.Mul(rGas, price) self.dirty = true return nil } func (self *StateObject) RefundGas(gas, price *big.Int) { self.gasPool.Add(self.gasPool, gas) } func (self *StateObject) Copy() *StateObject { stateObject := NewStateObject(self.Address(), self.db) stateObject.balance.Set(self.balance) stateObject.codeHash = common.CopyBytes(self.codeHash) stateObject.nonce = self.nonce if self.State != nil { stateObject.State = self.State.Copy() } stateObject.code = common.CopyBytes(self.code) stateObject.initCode = common.CopyBytes(self.initCode) stateObject.storage = self.storage.Copy() stateObject.gasPool.Set(self.gasPool) stateObject.remove = self.remove stateObject.dirty = self.dirty return stateObject } func (self *StateObject) Set(stateObject *StateObject) { *self = *stateObject } // // Attribute accessors // func (self *StateObject) Balance() *big.Int { return self.balance } func (c *StateObject) N() *big.Int { return big.NewInt(int64(c.nonce)) } // Returns the address of the contract/account func (c *StateObject) Address() common.Address { return c.address } // Returns the initialization Code func (c *StateObject) Init() Code { return c.initCode } func (self *StateObject) Trie() *trie.SecureTrie { return self.State.trie } func (self *StateObject) Root() []byte { return self.Trie().Root() } func (self *StateObject) Code() []byte { return self.code } func (self *StateObject) SetCode(code []byte) { self.code = code self.dirty = true } func (self *StateObject) SetInitCode(code []byte) { self.initCode = code self.dirty = true } func (self *StateObject) SetNonce(nonce uint64) { self.nonce = nonce self.dirty = true } func (self *StateObject) Nonce() uint64 { return self.nonce } // // Encoding // // State object encoding methods func (c *StateObject) RlpEncode() []byte { return common.Encode([]interface{}{c.nonce, c.balance, c.Root(), c.CodeHash()}) } func (c *StateObject) CodeHash() common.Bytes { return crypto.Sha3(c.code) } func (c *StateObject) RlpDecode(data []byte) { decoder := common.NewValueFromBytes(data) c.nonce = decoder.Get(0).Uint() c.balance = decoder.Get(1).BigInt() c.State = New(decoder.Get(2).Bytes(), c.db) //New(trie.New(common.Config.Db, decoder.Get(2).Interface())) c.storage = make(map[string]*common.Value) c.gasPool = new(big.Int) c.codeHash = decoder.Get(3).Bytes() c.code, _ = c.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 }