mirror of https://github.com/poanetwork/quorum.git
264 lines
6.0 KiB
Go
264 lines
6.0 KiB
Go
package ethchain
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import (
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"fmt"
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"github.com/ethereum/eth-go/ethcrypto"
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"github.com/ethereum/eth-go/ethtrie"
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"github.com/ethereum/eth-go/ethutil"
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"math/big"
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"strings"
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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 strings.Join(Disassemble(self), " ")
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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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Amount *big.Int
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ScriptHash []byte
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Nonce uint64
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// Contract related attributes
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state *State
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script Code
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initScript Code
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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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// Converts an transaction in to a state object
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func MakeContract(tx *Transaction, state *State) *StateObject {
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// Create contract if there's no recipient
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if tx.IsContract() {
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addr := tx.CreationAddress()
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contract := state.NewStateObject(addr)
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contract.initScript = tx.Data
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contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
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return contract
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}
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return nil
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}
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func NewStateObject(addr []byte) *StateObject {
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object := &StateObject{address: addr, Amount: new(big.Int), gasPool: new(big.Int)}
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object.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, ""))
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return object
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}
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func NewContract(address []byte, Amount *big.Int, root []byte) *StateObject {
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contract := &StateObject{address: address, Amount: Amount, Nonce: 0}
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contract.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, string(root)))
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return contract
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}
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// Returns a newly created account
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func NewAccount(address []byte, amount *big.Int) *StateObject {
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account := &StateObject{address: address, Amount: amount, Nonce: 0}
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return account
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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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}
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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 (c *StateObject) SetStorage(num *big.Int, val *ethutil.Value) {
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addr := ethutil.BigToBytes(num, 256)
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if val.BigInt().Cmp(ethutil.Big0) == 0 {
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c.state.trie.Delete(string(addr))
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return
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}
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c.SetAddr(addr, val)
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}
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func (c *StateObject) GetStorage(num *big.Int) *ethutil.Value {
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nb := ethutil.BigToBytes(num, 256)
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return c.GetAddr(nb)
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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.script)-1) < pc.Int64() {
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return ethutil.NewValue(0)
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}
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return ethutil.NewValueFromBytes([]byte{c.script[pc.Int64()]})
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}
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func (c *StateObject) AddAmount(amount *big.Int) {
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c.SetAmount(new(big.Int).Add(c.Amount, amount))
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statelogger.Infof("%x: #%d %v (+ %v)\n", c.Address(), c.Nonce, c.Amount, amount)
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}
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func (c *StateObject) SubAmount(amount *big.Int) {
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c.SetAmount(new(big.Int).Sub(c.Amount, amount))
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statelogger.Infof("%x: #%d %v (- %v)\n", c.Address(), c.Nonce, c.Amount, amount)
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}
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func (c *StateObject) SetAmount(amount *big.Int) {
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c.Amount = amount
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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, state *State) {}
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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.Amount) > 0 {
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return fmt.Errorf("insufficient amount: %v, %v", c.Amount, 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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statelogger.DebugDetailf("%x: fuel (+ %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.Amount.Sub(self.Amount, 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.Amount.Set(self.Amount)
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stateObject.ScriptHash = ethutil.CopyBytes(self.ScriptHash)
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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.script = ethutil.CopyBytes(self.script)
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stateObject.initScript = ethutil.CopyBytes(self.initScript)
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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) State() *State {
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return c.state
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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 main script body
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func (c *StateObject) Script() Code {
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return c.script
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}
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// Returns the initialization script
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func (c *StateObject) Init() Code {
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return c.initScript
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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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var root interface{}
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if c.state != nil {
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root = c.state.trie.Root
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} else {
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root = ""
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}
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return ethutil.Encode([]interface{}{c.Nonce, c.Amount, root, ethcrypto.Sha3Bin(c.script)})
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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.Amount = decoder.Get(1).BigInt()
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c.state = NewState(ethtrie.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
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c.ScriptHash = decoder.Get(3).Bytes()
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c.script, _ = ethutil.Config.Db.Get(c.ScriptHash)
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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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