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@ -5,6 +5,8 @@ import ( |
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"math/big" |
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"github.com/ethereum/go-ethereum/core/types" |
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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/state" |
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"github.com/ethereum/go-ethereum/vm" |
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) |
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@ -27,7 +29,7 @@ import ( |
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*/ |
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type StateTransition struct { |
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coinbase, receiver []byte |
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tx *types.Transaction |
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msg Message |
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gas, gasPrice *big.Int |
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value *big.Int |
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data []byte |
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@ -35,10 +37,42 @@ type StateTransition struct { |
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block *types.Block |
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cb, rec, sen *state.StateObject |
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Env vm.Environment |
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} |
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type Message interface { |
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Hash() []byte |
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CreatesContract() bool |
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From() []byte |
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To() []byte |
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GasValue() *big.Int |
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GasPrice() *big.Int |
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Gas() *big.Int |
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Value() *big.Int |
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Nonce() uint64 |
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Data() []byte |
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} |
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func NewStateTransition(coinbase *state.StateObject, tx *types.Transaction, state *state.StateDB, block *types.Block) *StateTransition { |
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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} |
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func AddressFromMessage(msg Message) []byte { |
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// Generate a new address
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return crypto.Sha3(ethutil.NewValue([]interface{}{msg.From(), msg.Nonce()}).Encode())[12:] |
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} |
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func NewStateTransition(coinbase *state.StateObject, msg Message, state *state.StateDB, block *types.Block) *StateTransition { |
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return &StateTransition{coinbase.Address(), msg.To(), msg, new(big.Int), new(big.Int).Set(msg.GasPrice()), msg.Value(), msg.Data(), state, block, coinbase, nil, nil, nil} |
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} |
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func (self *StateTransition) VmEnv() vm.Environment { |
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if self.Env == nil { |
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self.Env = NewEnv(self.state, self.msg, self.block) |
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} |
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return self.Env |
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} |
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func (self *StateTransition) Coinbase() *state.StateObject { |
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@ -49,17 +83,17 @@ func (self *StateTransition) Coinbase() *state.StateObject { |
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self.cb = self.state.GetOrNewStateObject(self.coinbase) |
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return self.cb |
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} |
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func (self *StateTransition) Sender() *state.StateObject { |
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func (self *StateTransition) From() *state.StateObject { |
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if self.sen != nil { |
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return self.sen |
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} |
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self.sen = self.state.GetOrNewStateObject(self.tx.Sender()) |
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self.sen = self.state.GetOrNewStateObject(self.msg.From()) |
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return self.sen |
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} |
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func (self *StateTransition) Receiver() *state.StateObject { |
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if self.tx != nil && self.tx.CreatesContract() { |
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func (self *StateTransition) To() *state.StateObject { |
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if self.msg != nil && self.msg.CreatesContract() { |
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return nil |
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} |
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@ -67,7 +101,7 @@ func (self *StateTransition) Receiver() *state.StateObject { |
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return self.rec |
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} |
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self.rec = self.state.GetOrNewStateObject(self.tx.Recipient) |
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self.rec = self.state.GetOrNewStateObject(self.msg.To()) |
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return self.rec |
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} |
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@ -87,41 +121,41 @@ func (self *StateTransition) AddGas(amount *big.Int) { |
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func (self *StateTransition) BuyGas() error { |
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var err error |
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sender := self.Sender() |
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if sender.Balance().Cmp(self.tx.GasValue()) < 0 { |
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return fmt.Errorf("Insufficient funds to pre-pay gas. Req %v, has %v", self.tx.GasValue(), sender.Balance()) |
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sender := self.From() |
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if sender.Balance().Cmp(self.msg.GasValue()) < 0 { |
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return fmt.Errorf("Insufficient funds to pre-pay gas. Req %v, has %v", self.msg.GasValue(), sender.Balance()) |
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} |
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coinbase := self.Coinbase() |
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err = coinbase.BuyGas(self.tx.Gas, self.tx.GasPrice) |
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err = coinbase.BuyGas(self.msg.Gas(), self.msg.GasPrice()) |
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if err != nil { |
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return err |
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} |
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self.AddGas(self.tx.Gas) |
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sender.SubAmount(self.tx.GasValue()) |
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self.AddGas(self.msg.Gas()) |
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sender.SubAmount(self.msg.GasValue()) |
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return nil |
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} |
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func (self *StateTransition) RefundGas() { |
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coinbase, sender := self.Coinbase(), self.Sender() |
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coinbase.RefundGas(self.gas, self.tx.GasPrice) |
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coinbase, sender := self.Coinbase(), self.From() |
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coinbase.RefundGas(self.gas, self.msg.GasPrice()) |
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// Return remaining gas
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remaining := new(big.Int).Mul(self.gas, self.tx.GasPrice) |
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remaining := new(big.Int).Mul(self.gas, self.msg.GasPrice()) |
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sender.AddAmount(remaining) |
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} |
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func (self *StateTransition) preCheck() (err error) { |
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var ( |
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tx = self.tx |
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sender = self.Sender() |
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msg = self.msg |
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sender = self.From() |
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) |
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// Make sure this transaction's nonce is correct
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if sender.Nonce != tx.Nonce { |
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return NonceError(tx.Nonce, sender.Nonce) |
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if sender.Nonce != msg.Nonce() { |
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return NonceError(msg.Nonce(), sender.Nonce) |
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} |
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// Pre-pay gas / Buy gas of the coinbase account
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@ -133,7 +167,7 @@ func (self *StateTransition) preCheck() (err error) { |
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} |
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func (self *StateTransition) TransitionState() (err error) { |
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statelogger.Debugf("(~) %x\n", self.tx.Hash()) |
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statelogger.Debugf("(~) %x\n", self.msg.Hash()) |
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// XXX Transactions after this point are considered valid.
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if err = self.preCheck(); err != nil { |
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@ -141,8 +175,8 @@ func (self *StateTransition) TransitionState() (err error) { |
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} |
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var ( |
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tx = self.tx |
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sender = self.Sender() |
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msg = self.msg |
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sender = self.From() |
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) |
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defer self.RefundGas() |
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@ -169,15 +203,15 @@ func (self *StateTransition) TransitionState() (err error) { |
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} |
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var ret []byte |
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vmenv := NewEnv(self.state, self.tx, self.block) |
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vmenv := self.VmEnv() |
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var ref vm.ClosureRef |
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if tx.CreatesContract() { |
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self.rec = MakeContract(tx, self.state) |
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if msg.CreatesContract() { |
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self.rec = MakeContract(msg, self.state) |
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ret, err, ref = vmenv.Create(sender, self.rec.Address(), self.tx.Data, self.gas, self.gasPrice, self.value) |
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ret, err, ref = vmenv.Create(sender, self.rec.Address(), self.msg.Data(), self.gas, self.gasPrice, self.value) |
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ref.SetCode(ret) |
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} else { |
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ret, err = vmenv.Call(self.Sender(), self.Receiver().Address(), self.tx.Data, self.gas, self.gasPrice, self.value) |
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ret, err = vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value) |
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} |
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if err != nil { |
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statelogger.Debugln(err) |
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@ -187,11 +221,11 @@ func (self *StateTransition) TransitionState() (err error) { |
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} |
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// Converts an transaction in to a state object
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func MakeContract(tx *types.Transaction, state *state.StateDB) *state.StateObject { |
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addr := tx.CreationAddress(state) |
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func MakeContract(msg Message, state *state.StateDB) *state.StateObject { |
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addr := AddressFromMessage(msg) |
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contract := state.GetOrNewStateObject(addr) |
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contract.InitCode = tx.Data |
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contract.InitCode = msg.Data() |
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return contract |
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} |
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