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light: light chain, VM env and tx pool

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This commit is contained in:
Zsolt Felfoldi
2016-10-14 05:47:09 +02:00
committed by Felix Lange
parent 8b1df1a259
commit 760fd65487
15 changed files with 2645 additions and 127 deletions
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42
light/state.go
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@ -20,6 +20,7 @@ import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"golang.org/x/net/context"
@ -33,10 +34,11 @@ var StartingNonce uint64
// state, retrieving unknown parts on-demand from the ODR backend. Changes are
// never stored in the local database, only in the memory objects.
type LightState struct {
odr OdrBackend
trie *LightTrie
odr OdrBackend
trie *LightTrie
id *TrieID
stateObjects map[string]*StateObject
refund *big.Int
}
// NewLightState creates a new LightState with the specified root.
@ -44,15 +46,25 @@ type LightState struct {
// root is non-existent. In that case, ODR retrieval will always be unsuccessful
// and every operation will return with an error or wait for the context to be
// cancelled.
func NewLightState(root common.Hash, odr OdrBackend) *LightState {
tr := NewLightTrie(root, odr, true)
func NewLightState(id *TrieID, odr OdrBackend) *LightState {
var tr *LightTrie
if id != nil {
tr = NewLightTrie(id, odr, true)
}
return &LightState{
odr: odr,
trie: tr,
id: id,
stateObjects: make(map[string]*StateObject),
refund: new(big.Int),
}
}
// AddRefund adds an amount to the refund value collected during a vm execution
func (self *LightState) AddRefund(gas *big.Int) {
self.refund.Add(self.refund, gas)
}
// HasAccount returns true if an account exists at the given address
func (self *LightState) HasAccount(ctx context.Context, addr common.Address) (bool, error) {
so, err := self.GetStateObject(ctx, addr)
@ -109,9 +121,9 @@ func (self *LightState) GetState(ctx context.Context, a common.Address, b common
return common.Hash{}, err
}
// IsDeleted returns true if the given account has been marked for deletion
// HasSuicided returns true if the given account has been marked for deletion
// or false if the account does not exist
func (self *LightState) IsDeleted(ctx context.Context, addr common.Address) (bool, error) {
func (self *LightState) HasSuicided(ctx context.Context, addr common.Address) (bool, error) {
stateObject, err := self.GetStateObject(ctx, addr)
if err == nil && stateObject != nil {
return stateObject.remove, nil
@ -145,7 +157,7 @@ func (self *LightState) SetNonce(ctx context.Context, addr common.Address, nonce
func (self *LightState) SetCode(ctx context.Context, addr common.Address, code []byte) error {
stateObject, err := self.GetOrNewStateObject(ctx, addr)
if err == nil && stateObject != nil {
stateObject.SetCode(code)
stateObject.SetCode(crypto.Keccak256Hash(code), code)
}
return err
}
@ -160,7 +172,7 @@ func (self *LightState) SetState(ctx context.Context, addr common.Address, key c
}
// Delete marks an account to be removed and clears its balance
func (self *LightState) Delete(ctx context.Context, addr common.Address) (bool, error) {
func (self *LightState) Suicide(ctx context.Context, addr common.Address) (bool, error) {
stateObject, err := self.GetOrNewStateObject(ctx, addr)
if err == nil && stateObject != nil {
stateObject.MarkForDeletion()
@ -194,7 +206,7 @@ func (self *LightState) GetStateObject(ctx context.Context, addr common.Address)
return nil, nil
}
stateObject, err = DecodeObject(ctx, addr, self.odr, []byte(data))
stateObject, err = DecodeObject(ctx, self.id, addr, self.odr, []byte(data))
if err != nil {
return nil, err
}
@ -258,14 +270,16 @@ func (self *LightState) CreateStateObject(ctx context.Context, addr common.Addre
// Copy creates a copy of the state
func (self *LightState) Copy() *LightState {
// ignore error - we assume state-to-be-copied always exists
state := NewLightState(common.Hash{}, self.odr)
state := NewLightState(nil, self.odr)
state.trie = self.trie
state.id = self.id
for k, stateObject := range self.stateObjects {
if stateObject.dirty {
state.stateObjects[k] = stateObject.Copy()
}
}
state.refund.Set(self.refund)
return state
}
@ -274,4 +288,10 @@ func (self *LightState) Copy() *LightState {
func (self *LightState) Set(state *LightState) {
self.trie = state.trie
self.stateObjects = state.stateObjects
self.refund = state.refund
}
// GetRefund returns the refund value collected during a vm execution
func (self *LightState) GetRefund() *big.Int {
return self.refund
}