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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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+
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+ Env vm.Environment
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+}
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+
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+type Message interface {
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+ Hash() []byte
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+
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+ CreatesContract() bool
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+
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+ From() []byte
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+ To() []byte
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+
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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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+
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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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+
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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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+
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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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+
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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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