mirror of https://github.com/status-im/op-geth.git
163 lines
3.9 KiB
Go
163 lines
3.9 KiB
Go
package ethchain
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import (
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"github.com/ethereum/eth-go/ethutil"
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"math/big"
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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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Nonce uint64
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// Contract related attributes
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state *State
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script []byte
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initScript []byte
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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(ethutil.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 (c *StateObject) Addr(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) State() *State {
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return c.state
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}
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func (c *StateObject) GetMem(num *big.Int) *ethutil.Value {
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nb := ethutil.BigToBytes(num, 256)
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return c.Addr(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) SetMem(num *big.Int, val *ethutil.Value) {
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addr := ethutil.BigToBytes(num, 256)
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c.state.trie.Update(string(addr), string(val.Encode()))
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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(val *big.Int, state *State) {
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c.AddAmount(val)
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}
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func (c *StateObject) AddAmount(amount *big.Int) {
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c.Amount.Add(c.Amount, amount)
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}
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func (c *StateObject) SubAmount(amount *big.Int) {
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c.Amount.Sub(c.Amount, amount)
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}
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func (c *StateObject) Address() []byte {
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return c.address
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}
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func (c *StateObject) Script() []byte {
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return c.script
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}
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func (c *StateObject) Init() []byte {
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return c.initScript
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}
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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 = nil
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}
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return ethutil.Encode([]interface{}{c.Amount, c.Nonce, root, 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.Amount = decoder.Get(0).BigInt()
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c.Nonce = decoder.Get(1).Uint()
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c.state = NewState(ethutil.NewTrie(ethutil.Config.Db, decoder.Get(2).Interface()))
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c.script = decoder.Get(3).Bytes()
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}
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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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// FIXME
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addr := tx.Hash()[12:]
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value := tx.Value
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contract := NewContract(addr, value, []byte(""))
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state.UpdateStateObject(contract)
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contract.script = tx.Data
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contract.initScript = tx.Init
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state.UpdateStateObject(contract)
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return contract
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}
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return nil
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}
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// The cached state and state object cache are helpers which will give you somewhat
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// control over the nonce. When creating new transactions you're interested in the 'next'
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// nonce rather than the current nonce. This to avoid creating invalid-nonce transactions.
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type StateObjectCache struct {
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cachedObjects map[string]*CachedStateObject
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}
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func NewStateObjectCache() *StateObjectCache {
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return &StateObjectCache{cachedObjects: make(map[string]*CachedStateObject)}
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}
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func (s *StateObjectCache) Add(addr []byte, object *StateObject) *CachedStateObject {
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state := &CachedStateObject{Nonce: object.Nonce, Object: object}
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s.cachedObjects[string(addr)] = state
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return state
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}
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func (s *StateObjectCache) Get(addr []byte) *CachedStateObject {
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return s.cachedObjects[string(addr)]
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}
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type CachedStateObject struct {
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Nonce uint64
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Object *StateObject
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}
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