2014-10-31 06:43:14 -07:00
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package state
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2014-07-22 02:54:48 -07:00
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import (
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"fmt"
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2014-07-29 15:31:15 -07:00
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"math/big"
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2014-10-31 04:37:43 -07:00
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"github.com/ethereum/go-ethereum/crypto"
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2014-10-23 06:01:27 -07:00
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"github.com/ethereum/go-ethereum/ethutil"
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2014-10-31 06:45:03 -07:00
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"github.com/ethereum/go-ethereum/trie"
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)
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type Code []byte
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func (self Code) String() string {
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return string(self) //strings.Join(Disassemble(self), " ")
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}
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type Storage map[string]*ethutil.Value
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func (self Storage) Copy() Storage {
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cpy := make(Storage)
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for key, value := range self {
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// XXX Do we need a 'value' copy or is this sufficient?
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cpy[key] = value
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}
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return cpy
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}
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type StateObject struct {
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// Address of the object
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address []byte
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// Shared attributes
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balance *big.Int
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codeHash []byte
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Nonce uint64
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// Contract related attributes
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State *StateDB
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Code Code
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InitCode Code
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storage Storage
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// Total gas pool is the total amount of gas currently
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// left if this object is the coinbase. Gas is directly
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// purchased of the coinbase.
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gasPool *big.Int
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// Mark for deletion
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// When an object is marked for deletion it will be delete from the trie
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// during the "update" phase of the state transition
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remove bool
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}
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func (self *StateObject) Reset() {
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self.storage = make(Storage)
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self.State.Reset()
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}
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func NewStateObject(addr []byte) *StateObject {
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// This to ensure that it has 20 bytes (and not 0 bytes), thus left or right pad doesn't matter.
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address := ethutil.Address(addr)
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object := &StateObject{address: address, balance: new(big.Int), gasPool: new(big.Int)}
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object.State = New(trie.New(ethutil.Config.Db, ""))
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object.storage = make(Storage)
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object.gasPool = new(big.Int)
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return object
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}
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func NewContract(address []byte, balance *big.Int, root []byte) *StateObject {
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contract := NewStateObject(address)
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contract.balance = balance
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contract.State = New(trie.New(ethutil.Config.Db, string(root)))
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return contract
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}
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func NewStateObjectFromBytes(address, data []byte) *StateObject {
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object := &StateObject{address: address}
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object.RlpDecode(data)
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return object
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}
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func (self *StateObject) MarkForDeletion() {
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self.remove = true
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statelogger.DebugDetailf("%x: #%d %v (deletion)\n", self.Address(), self.Nonce, self.balance)
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}
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func (c *StateObject) GetAddr(addr []byte) *ethutil.Value {
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return ethutil.NewValueFromBytes([]byte(c.State.Trie.Get(string(addr))))
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}
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func (c *StateObject) SetAddr(addr []byte, value interface{}) {
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c.State.Trie.Update(string(addr), string(ethutil.NewValue(value).Encode()))
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}
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func (self *StateObject) GetStorage(key *big.Int) *ethutil.Value {
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return self.GetState(key.Bytes())
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}
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func (self *StateObject) SetStorage(key *big.Int, value *ethutil.Value) {
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self.SetState(key.Bytes(), value)
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}
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func (self *StateObject) Storage() map[string]*ethutil.Value {
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return self.storage
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}
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func (self *StateObject) GetState(k []byte) *ethutil.Value {
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key := ethutil.LeftPadBytes(k, 32)
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value := self.storage[string(key)]
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if value == nil {
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value = self.GetAddr(key)
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if !value.IsNil() {
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self.storage[string(key)] = value
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}
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}
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return value
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}
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func (self *StateObject) SetState(k []byte, value *ethutil.Value) {
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key := ethutil.LeftPadBytes(k, 32)
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self.storage[string(key)] = value.Copy()
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}
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// Iterate over each storage address and yield callback
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func (self *StateObject) EachStorage(cb trie.EachCallback) {
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// First loop over the uncommit/cached values in storage
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for key, value := range self.storage {
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// XXX Most iterators Fns as it stands require encoded values
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encoded := ethutil.NewValue(value.Encode())
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cb(key, encoded)
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}
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it := self.State.Trie.NewIterator()
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it.Each(func(key string, value *ethutil.Value) {
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// If it's cached don't call the callback.
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if self.storage[key] == nil {
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cb(key, value)
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}
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})
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}
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func (self *StateObject) Sync() {
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for key, value := range self.storage {
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if value.Len() == 0 {
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self.State.Trie.Delete(string(key))
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continue
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}
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self.SetAddr([]byte(key), value)
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}
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valid, t2 := trie.ParanoiaCheck(self.State.Trie)
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if !valid {
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statelogger.Infof("Warn: PARANOIA: Different state storage root during copy %x vs %x\n", self.State.Root(), t2.GetRoot())
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self.State.Trie = t2
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}
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}
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func (c *StateObject) GetInstr(pc *big.Int) *ethutil.Value {
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if int64(len(c.Code)-1) < pc.Int64() {
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return ethutil.NewValue(0)
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}
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return ethutil.NewValueFromBytes([]byte{c.Code[pc.Int64()]})
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}
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2014-10-22 06:22:21 -07:00
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func (c *StateObject) AddBalance(amount *big.Int) {
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c.SetBalance(new(big.Int).Add(c.balance, amount))
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statelogger.Debugf("%x: #%d %v (+ %v)\n", c.Address(), c.Nonce, c.balance, amount)
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}
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func (c *StateObject) AddAmount(amount *big.Int) { c.AddBalance(amount) }
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func (c *StateObject) SubBalance(amount *big.Int) {
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c.SetBalance(new(big.Int).Sub(c.balance, amount))
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statelogger.Debugf("%x: #%d %v (- %v)\n", c.Address(), c.Nonce, c.balance, amount)
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}
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func (c *StateObject) SubAmount(amount *big.Int) { c.SubBalance(amount) }
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func (c *StateObject) SetBalance(amount *big.Int) {
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c.balance = amount
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}
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func (self *StateObject) Balance() *big.Int { return self.balance }
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//
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// Gas setters and getters
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//
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// Return the gas back to the origin. Used by the Virtual machine or Closures
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func (c *StateObject) ReturnGas(gas, price *big.Int) {}
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func (c *StateObject) ConvertGas(gas, price *big.Int) error {
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total := new(big.Int).Mul(gas, price)
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if total.Cmp(c.balance) > 0 {
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return fmt.Errorf("insufficient amount: %v, %v", c.balance, total)
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}
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c.SubAmount(total)
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return nil
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}
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func (self *StateObject) SetGasPool(gasLimit *big.Int) {
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self.gasPool = new(big.Int).Set(gasLimit)
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2014-12-01 11:18:09 -08:00
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statelogger.Debugf("%x: gas (+ %v)", self.Address(), self.gasPool)
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}
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func (self *StateObject) BuyGas(gas, price *big.Int) error {
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if self.gasPool.Cmp(gas) < 0 {
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return GasLimitError(self.gasPool, gas)
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}
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rGas := new(big.Int).Set(gas)
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rGas.Mul(rGas, price)
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self.AddAmount(rGas)
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return nil
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}
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func (self *StateObject) RefundGas(gas, price *big.Int) {
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self.gasPool.Add(self.gasPool, gas)
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rGas := new(big.Int).Set(gas)
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rGas.Mul(rGas, price)
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self.balance.Sub(self.balance, rGas)
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}
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func (self *StateObject) Copy() *StateObject {
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stateObject := NewStateObject(self.Address())
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stateObject.balance.Set(self.balance)
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stateObject.codeHash = ethutil.CopyBytes(self.codeHash)
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stateObject.Nonce = self.Nonce
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if self.State != nil {
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stateObject.State = self.State.Copy()
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}
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stateObject.Code = ethutil.CopyBytes(self.Code)
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stateObject.InitCode = ethutil.CopyBytes(self.InitCode)
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stateObject.storage = self.storage.Copy()
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stateObject.gasPool.Set(self.gasPool)
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stateObject.remove = self.remove
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return stateObject
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}
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func (self *StateObject) Set(stateObject *StateObject) {
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*self = *stateObject
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}
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//
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// Attribute accessors
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//
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func (c *StateObject) N() *big.Int {
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return big.NewInt(int64(c.Nonce))
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}
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// Returns the address of the contract/account
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func (c *StateObject) Address() []byte {
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return c.address
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}
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// Returns the initialization Code
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func (c *StateObject) Init() Code {
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return c.InitCode
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}
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func (self *StateObject) Root() []byte {
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return self.State.Trie.GetRoot()
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}
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func (self *StateObject) SetCode(code []byte) {
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self.Code = code
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}
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//
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// Encoding
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//
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// State object encoding methods
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func (c *StateObject) RlpEncode() []byte {
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return ethutil.Encode([]interface{}{c.Nonce, c.balance, c.Root(), c.CodeHash()})
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}
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func (c *StateObject) CodeHash() ethutil.Bytes {
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return crypto.Sha3(c.Code)
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}
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func (c *StateObject) RlpDecode(data []byte) {
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decoder := ethutil.NewValueFromBytes(data)
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c.Nonce = decoder.Get(0).Uint()
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c.balance = decoder.Get(1).BigInt()
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c.State = New(trie.New(ethutil.Config.Db, decoder.Get(2).Interface()))
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c.storage = make(map[string]*ethutil.Value)
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c.gasPool = new(big.Int)
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c.codeHash = decoder.Get(3).Bytes()
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c.Code, _ = ethutil.Config.Db.Get(c.codeHash)
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}
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// Storage change object. Used by the manifest for notifying changes to
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// the sub channels.
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type StorageState struct {
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StateAddress []byte
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Address []byte
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Value *big.Int
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}
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