core, miner, tests: renamed state methods

* Update => SyncIntermediate
* Added SyncObjects

SyncIntermediate only updates whatever has changed, but, as a side
effect, requires much more disk space.

SyncObjects will only sync whatever is required for a block and will not
save intermediate state to disk. As drawback this requires more time
when more txs come in.

5 files changed, 10 insertions, 8 deletions

diff --git a/core/block_processor.go b/core/block_processor.go
index 5f745e491..e7ad059c3 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -77,7 +77,7 @@ func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, stated
 	}
 
 	// Update the state with pending changes
-	statedb.Update()
+	statedb.SyncIntermediate()
 
 	usedGas.Add(usedGas, gas)
 	receipt := types.NewReceipt(statedb.Root().Bytes(), usedGas)
@@ -243,7 +243,7 @@ func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (logs st
 
 	// Commit state objects/accounts to a temporary trie (does not save)
 	// used to calculate the state root.
-	state.CleanUpdate()
+	state.SyncObjects()
 	if header.Root != state.Root() {
 		err = fmt.Errorf("invalid merkle root. received=%x got=%x", header.Root, state.Root())
 		return
diff --git a/core/chain_makers.go b/core/chain_makers.go
index 37475e0ae..c46f627f8 100644
--- a/core/chain_makers.go
+++ b/core/chain_makers.go
@@ -77,7 +77,7 @@ func (b *BlockGen) AddTx(tx *types.Transaction) {
 	if err != nil {
 		panic(err)
 	}
-	b.statedb.Update()
+	b.statedb.SyncIntermediate()
 	b.header.GasUsed.Add(b.header.GasUsed, gas)
 	receipt := types.NewReceipt(b.statedb.Root().Bytes(), b.header.GasUsed)
 	logs := b.statedb.GetLogs(tx.Hash())
@@ -135,7 +135,7 @@ func GenerateChain(parent *types.Block, db common.Database, n int, gen func(int,
 			gen(i, b)
 		}
 		AccumulateRewards(statedb, h, b.uncles)
-		statedb.Update()
+		statedb.SyncIntermediate()
 		h.Root = statedb.Root()
 		return types.NewBlock(h, b.txs, b.uncles, b.receipts)
 	}
diff --git a/core/genesis.go b/core/genesis.go
index df13466ec..d27e7097b 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -64,7 +64,7 @@ func GenesisBlockForTesting(db common.Database, addr common.Address, balance *bi
 	statedb := state.New(common.Hash{}, db)
 	obj := statedb.GetOrNewStateObject(addr)
 	obj.SetBalance(balance)
-	statedb.Update()
+	statedb.SyncObjects()
 	statedb.Sync()
 	block := types.NewBlock(&types.Header{
 		Difficulty: params.GenesisDifficulty,
diff --git a/core/state/state_test.go b/core/state/state_test.go
index 00e133dab..b63b8ae9b 100644
--- a/core/state/state_test.go
+++ b/core/state/state_test.go
@@ -72,7 +72,7 @@ func TestNull(t *testing.T) {
 	//value := common.FromHex("0x823140710bf13990e4500136726d8b55")
 	var value common.Hash
 	state.SetState(address, common.Hash{}, value)
-	state.Update()
+	state.SyncIntermediate()
 	state.Sync()
 	value = state.GetState(address, common.Hash{})
 	if !common.EmptyHash(value) {
diff --git a/core/state/statedb.go b/core/state/statedb.go
index bd4ff6ff3..4ccda1fc7 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -324,7 +324,8 @@ func (self *StateDB) Refunds() *big.Int {
 	return self.refund
 }
 
-func (self *StateDB) Update() {
+// SyncIntermediate updates the intermediate state and all mid steps
+func (self *StateDB) SyncIntermediate() {
 	self.refund = new(big.Int)
 
 	for _, stateObject := range self.stateObjects {
@@ -341,7 +342,8 @@ func (self *StateDB) Update() {
 	}
 }
 
-func (self *StateDB) CleanUpdate() {
+// SyncObjects syncs the changed objects to the trie
+func (self *StateDB) SyncObjects() {
 	self.trie = trie.NewSecure(self.root[:], self.db)
 
 	self.refund = new(big.Int)