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-rw-r--r--core/state_transition.go145
1 files changed, 90 insertions, 55 deletions
diff --git a/core/state_transition.go b/core/state_transition.go
index 820ba66e6..9e81ddf28 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -5,6 +5,8 @@ import (
"math/big"
"github.com/ethereum/go-ethereum/core/types"
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/vm"
)
@@ -27,48 +29,69 @@ import (
*/
type StateTransition struct {
coinbase, receiver []byte
- tx *types.Transaction
+ msg Message
gas, gasPrice *big.Int
+ initialGas *big.Int
value *big.Int
data []byte
state *state.StateDB
block *types.Block
cb, rec, sen *state.StateObject
+
+ Env vm.Environment
}
-func NewStateTransition(coinbase *state.StateObject, tx *types.Transaction, state *state.StateDB, block *types.Block) *StateTransition {
- return &StateTransition{coinbase.Address(), tx.Recipient, tx, new(big.Int), new(big.Int).Set(tx.GasPrice), tx.Value, tx.Data, state, block, coinbase, nil, nil}
+type Message interface {
+ Hash() []byte
+
+ From() []byte
+ To() []byte
+
+ GasPrice() *big.Int
+ Gas() *big.Int
+ Value() *big.Int
+
+ Nonce() uint64
+ Data() []byte
}
-func (self *StateTransition) Coinbase() *state.StateObject {
- if self.cb != nil {
- return self.cb
- }
+func AddressFromMessage(msg Message) []byte {
+ // Generate a new address
+ return crypto.Sha3(ethutil.NewValue([]interface{}{msg.From(), msg.Nonce()}).Encode())[12:]
+}
- self.cb = self.state.GetOrNewStateObject(self.coinbase)
- return self.cb
+func MessageCreatesContract(msg Message) bool {
+ return len(msg.To()) == 0
}
-func (self *StateTransition) Sender() *state.StateObject {
- if self.sen != nil {
- return self.sen
- }
- self.sen = self.state.GetOrNewStateObject(self.tx.Sender())
+func MessageGasValue(msg Message) *big.Int {
+ return new(big.Int).Mul(msg.Gas(), msg.GasPrice())
+}
- return self.sen
+func NewStateTransition(coinbase *state.StateObject, msg Message, state *state.StateDB, block *types.Block) *StateTransition {
+ return &StateTransition{coinbase.Address(), msg.To(), msg, new(big.Int), new(big.Int).Set(msg.GasPrice()), new(big.Int), msg.Value(), msg.Data(), state, block, coinbase, nil, nil, nil}
}
-func (self *StateTransition) Receiver() *state.StateObject {
- if self.tx != nil && self.tx.CreatesContract() {
- return nil
- }
- if self.rec != nil {
- return self.rec
+func (self *StateTransition) VmEnv() vm.Environment {
+ if self.Env == nil {
+ self.Env = NewEnv(self.state, self.msg, self.block)
}
- self.rec = self.state.GetOrNewStateObject(self.tx.Recipient)
- return self.rec
+ return self.Env
+}
+
+func (self *StateTransition) Coinbase() *state.StateObject {
+ return self.state.GetOrNewStateObject(self.coinbase)
+}
+func (self *StateTransition) From() *state.StateObject {
+ return self.state.GetOrNewStateObject(self.msg.From())
+}
+func (self *StateTransition) To() *state.StateObject {
+ if self.msg != nil && MessageCreatesContract(self.msg) {
+ return nil
+ }
+ return self.state.GetOrNewStateObject(self.msg.To())
}
func (self *StateTransition) UseGas(amount *big.Int) error {
@@ -87,41 +110,33 @@ func (self *StateTransition) AddGas(amount *big.Int) {
func (self *StateTransition) BuyGas() error {
var err error
- sender := self.Sender()
- if sender.Balance().Cmp(self.tx.GasValue()) < 0 {
- return fmt.Errorf("Insufficient funds to pre-pay gas. Req %v, has %v", self.tx.GasValue(), sender.Balance())
+ sender := self.From()
+ if sender.Balance().Cmp(MessageGasValue(self.msg)) < 0 {
+ return fmt.Errorf("Insufficient funds to pre-pay gas. Req %v, has %v", MessageGasValue(self.msg), sender.Balance())
}
coinbase := self.Coinbase()
- err = coinbase.BuyGas(self.tx.Gas, self.tx.GasPrice)
+ err = coinbase.BuyGas(self.msg.Gas(), self.msg.GasPrice())
if err != nil {
return err
}
- self.AddGas(self.tx.Gas)
- sender.SubAmount(self.tx.GasValue())
+ self.AddGas(self.msg.Gas())
+ self.initialGas.Set(self.msg.Gas())
+ sender.SubAmount(MessageGasValue(self.msg))
return nil
}
-func (self *StateTransition) RefundGas() {
- coinbase, sender := self.Coinbase(), self.Sender()
- coinbase.RefundGas(self.gas, self.tx.GasPrice)
-
- // Return remaining gas
- remaining := new(big.Int).Mul(self.gas, self.tx.GasPrice)
- sender.AddAmount(remaining)
-}
-
func (self *StateTransition) preCheck() (err error) {
var (
- tx = self.tx
- sender = self.Sender()
+ msg = self.msg
+ sender = self.From()
)
// Make sure this transaction's nonce is correct
- if sender.Nonce != tx.Nonce {
- return NonceError(tx.Nonce, sender.Nonce)
+ if sender.Nonce != msg.Nonce() {
+ return NonceError(msg.Nonce(), sender.Nonce)
}
// Pre-pay gas / Buy gas of the coinbase account
@@ -132,8 +147,8 @@ func (self *StateTransition) preCheck() (err error) {
return nil
}
-func (self *StateTransition) TransitionState() (err error) {
- statelogger.Debugf("(~) %x\n", self.tx.Hash())
+func (self *StateTransition) TransitionState() (ret []byte, err error) {
+ statelogger.Debugf("(~) %x\n", self.msg.Hash())
// XXX Transactions after this point are considered valid.
if err = self.preCheck(); err != nil {
@@ -141,8 +156,8 @@ func (self *StateTransition) TransitionState() (err error) {
}
var (
- tx = self.tx
- sender = self.Sender()
+ msg = self.msg
+ sender = self.From()
)
defer self.RefundGas()
@@ -168,16 +183,15 @@ func (self *StateTransition) TransitionState() (err error) {
return
}
- var ret []byte
- vmenv := NewEnv(self.state, self.tx, self.block)
+ vmenv := self.VmEnv()
var ref vm.ClosureRef
- if tx.CreatesContract() {
- self.rec = MakeContract(tx, self.state)
+ if MessageCreatesContract(msg) {
+ self.rec = MakeContract(msg, self.state)
- ret, err, ref = vmenv.Create(sender, self.rec.Address(), self.tx.Data, self.gas, self.gasPrice, self.value)
+ ret, err, ref = vmenv.Create(sender, self.rec.Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
ref.SetCode(ret)
} else {
- ret, err = vmenv.Call(self.Sender(), self.Receiver().Address(), self.tx.Data, self.gas, self.gasPrice, self.value)
+ ret, err = vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
}
if err != nil {
statelogger.Debugln(err)
@@ -187,11 +201,32 @@ func (self *StateTransition) TransitionState() (err error) {
}
// Converts an transaction in to a state object
-func MakeContract(tx *types.Transaction, state *state.StateDB) *state.StateObject {
- addr := tx.CreationAddress(state)
+func MakeContract(msg Message, state *state.StateDB) *state.StateObject {
+ addr := AddressFromMessage(msg)
contract := state.GetOrNewStateObject(addr)
- contract.InitCode = tx.Data
+ contract.InitCode = msg.Data()
return contract
}
+
+func (self *StateTransition) RefundGas() {
+ coinbaseSub := new(big.Int).Set(self.gas)
+ uhalf := new(big.Int).Div(self.GasUsed(), ethutil.Big2)
+ for addr, ref := range self.state.Refunds() {
+ refund := ethutil.BigMin(uhalf, ref)
+ coinbaseSub.Add(self.gas, refund)
+ self.state.AddBalance([]byte(addr), refund.Mul(refund, self.msg.GasPrice()))
+ }
+
+ coinbase, sender := self.Coinbase(), self.From()
+ coinbase.RefundGas(coinbaseSub, self.msg.GasPrice())
+
+ // Return remaining gas
+ remaining := new(big.Int).Mul(self.gas, self.msg.GasPrice())
+ sender.AddAmount(remaining)
+}
+
+func (self *StateTransition) GasUsed() *big.Int {
+ return new(big.Int).Sub(self.initialGas, self.gas)
+}
generated by cgit (git 2.34.1) at 2024-11-12 21:14:54 +0800