360 lines
8.2 KiB
Go
360 lines
8.2 KiB
Go
package state
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import (
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"bytes"
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/rlp"
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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) String() (str string) {
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for key, value := range self {
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str += fmt.Sprintf("%X : %X\n", key, value.Bytes())
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}
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return
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}
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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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// State database for storing state changes
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db ethutil.Database
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// The state object
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State *StateDB
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// Address belonging to this account
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address []byte
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// The balance of the account
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balance *big.Int
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// The nonce of the account
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nonce uint64
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// The code hash if code is present (i.e. a contract)
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codeHash []byte
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// The code for this account
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code Code
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// Temporarily initialisation code
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initCode Code
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// Cached storage (flushed when updated)
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storage Storage
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// Temporary prepaid gas, reward after transition
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prepaid *big.Int
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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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dirty 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, db ethutil.Database) *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{db: db, address: address, balance: new(big.Int), gasPool: new(big.Int), dirty: true}
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object.State = New(nil, db) //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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object.prepaid = new(big.Int)
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return object
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}
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func NewStateObjectFromBytes(address, data []byte, db ethutil.Database) *StateObject {
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// TODO clean me up
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var extobject struct {
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Nonce uint64
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Balance *big.Int
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Root []byte
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CodeHash []byte
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}
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err := rlp.Decode(bytes.NewReader(data), &extobject)
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if err != nil {
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fmt.Println(err)
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return nil
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}
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object := &StateObject{address: address, db: db}
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//object.RlpDecode(data)
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object.nonce = extobject.Nonce
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object.balance = extobject.Balance
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object.codeHash = extobject.CodeHash
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object.State = New(extobject.Root, db)
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object.storage = make(map[string]*ethutil.Value)
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object.gasPool = new(big.Int)
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object.prepaid = new(big.Int)
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object.code, _ = db.Get(extobject.CodeHash)
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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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self.dirty = true
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statelogger.Debugf("%x: #%d %v X\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(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(addr, ethutil.Encode(value))
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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() Storage {
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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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self.dirty = true
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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([]byte(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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self.storage = make(Storage)
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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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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) 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) SetBalance(amount *big.Int) {
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c.balance = amount
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c.dirty = true
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}
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func (c *StateObject) St() Storage {
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return c.storage
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}
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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.SubBalance(total)
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c.dirty = true
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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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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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self.gasPool.Sub(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.dirty = true
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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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}
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func (self *StateObject) Copy() *StateObject {
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stateObject := NewStateObject(self.Address(), self.db)
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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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stateObject.dirty = self.dirty
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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 (self *StateObject) Balance() *big.Int {
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return self.balance
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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) Trie() *trie.SecureTrie {
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return self.State.trie
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}
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func (self *StateObject) Root() []byte {
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return self.Trie().Root()
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}
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func (self *StateObject) Code() []byte {
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return self.code
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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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self.dirty = true
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}
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func (self *StateObject) SetInitCode(code []byte) {
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self.initCode = code
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self.dirty = true
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}
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func (self *StateObject) SetNonce(nonce uint64) {
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self.nonce = nonce
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self.dirty = true
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}
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func (self *StateObject) Nonce() uint64 {
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return self.nonce
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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(decoder.Get(2).Bytes(), c.db) //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, _ = c.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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