plugeth/core/chain_manager.go

305 lines
7.4 KiB
Go

package core
import (
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/state"
)
var chainlogger = logger.NewLogger("CHAIN")
func AddTestNetFunds(block *types.Block) {
for _, addr := range []string{
"51ba59315b3a95761d0863b05ccc7a7f54703d99",
"e4157b34ea9615cfbde6b4fda419828124b70c78",
"b9c015918bdaba24b4ff057a92a3873d6eb201be",
"6c386a4b26f73c802f34673f7248bb118f97424a",
"cd2a3d9f938e13cd947ec05abc7fe734df8dd826",
"2ef47100e0787b915105fd5e3f4ff6752079d5cb",
"e6716f9544a56c530d868e4bfbacb172315bdead",
"1a26338f0d905e295fccb71fa9ea849ffa12aaf4",
} {
codedAddr := ethutil.Hex2Bytes(addr)
account := block.State().GetAccount(codedAddr)
account.SetBalance(ethutil.Big("1606938044258990275541962092341162602522202993782792835301376")) //ethutil.BigPow(2, 200)
block.State().UpdateStateObject(account)
}
}
func CalcDifficulty(block, parent *types.Block) *big.Int {
diff := new(big.Int)
adjust := new(big.Int).Rsh(parent.Difficulty, 10)
if block.Time >= parent.Time+5 {
diff.Sub(parent.Difficulty, adjust)
} else {
diff.Add(parent.Difficulty, adjust)
}
return diff
}
type ChainManager struct {
//eth EthManager
processor types.BlockProcessor
eventMux *event.TypeMux
genesisBlock *types.Block
// Last known total difficulty
TD *big.Int
LastBlockNumber uint64
CurrentBlock *types.Block
LastBlockHash []byte
transState *state.StateDB
}
func NewChainManager(mux *event.TypeMux) *ChainManager {
bc := &ChainManager{}
bc.genesisBlock = types.NewBlockFromBytes(ethutil.Encode(Genesis))
bc.eventMux = mux
bc.setLastBlock()
bc.transState = bc.State().Copy()
return bc
}
func (self *ChainManager) Status() (td *big.Int, currentBlock []byte, genesisBlock []byte) {
return self.TD, self.CurrentBlock.Hash(), self.Genesis().Hash()
}
func (self *ChainManager) SetProcessor(proc types.BlockProcessor) {
self.processor = proc
}
func (self *ChainManager) State() *state.StateDB {
return self.CurrentBlock.State()
}
func (self *ChainManager) TransState() *state.StateDB {
return self.transState
}
func (bc *ChainManager) setLastBlock() {
data, _ := ethutil.Config.Db.Get([]byte("LastBlock"))
if len(data) != 0 {
// Prep genesis
AddTestNetFunds(bc.genesisBlock)
block := types.NewBlockFromBytes(data)
bc.CurrentBlock = block
bc.LastBlockHash = block.Hash()
bc.LastBlockNumber = block.Number.Uint64()
// Set the last know difficulty (might be 0x0 as initial value, Genesis)
bc.TD = ethutil.BigD(ethutil.Config.Db.LastKnownTD())
} else {
bc.Reset()
}
chainlogger.Infof("Last block (#%d) %x\n", bc.LastBlockNumber, bc.CurrentBlock.Hash())
}
// Block creation & chain handling
func (bc *ChainManager) NewBlock(coinbase []byte) *types.Block {
var root interface{}
hash := ZeroHash256
if bc.CurrentBlock != nil {
root = bc.CurrentBlock.Root()
hash = bc.LastBlockHash
}
block := types.CreateBlock(
root,
hash,
coinbase,
ethutil.BigPow(2, 32),
nil,
"")
parent := bc.CurrentBlock
if parent != nil {
block.Difficulty = CalcDifficulty(block, parent)
block.Number = new(big.Int).Add(bc.CurrentBlock.Number, ethutil.Big1)
block.GasLimit = block.CalcGasLimit(bc.CurrentBlock)
}
return block
}
func (bc *ChainManager) Reset() {
AddTestNetFunds(bc.genesisBlock)
bc.genesisBlock.Trie().Sync()
// Prepare the genesis block
bc.write(bc.genesisBlock)
bc.insert(bc.genesisBlock)
bc.CurrentBlock = bc.genesisBlock
bc.SetTotalDifficulty(ethutil.Big("0"))
// Set the last know difficulty (might be 0x0 as initial value, Genesis)
bc.TD = ethutil.BigD(ethutil.Config.Db.LastKnownTD())
}
func (bc *ChainManager) insert(block *types.Block) {
encodedBlock := block.RlpEncode()
ethutil.Config.Db.Put([]byte("LastBlock"), encodedBlock)
bc.CurrentBlock = block
bc.LastBlockHash = block.Hash()
}
func (bc *ChainManager) write(block *types.Block) {
bc.writeBlockInfo(block)
encodedBlock := block.RlpEncode()
ethutil.Config.Db.Put(block.Hash(), encodedBlock)
}
// Accessors
func (bc *ChainManager) Genesis() *types.Block {
return bc.genesisBlock
}
// Block fetching methods
func (bc *ChainManager) HasBlock(hash []byte) bool {
data, _ := ethutil.Config.Db.Get(hash)
return len(data) != 0
}
func (self *ChainManager) GetBlockHashesFromHash(hash []byte, max uint64) (chain [][]byte) {
block := self.GetBlock(hash)
if block == nil {
return
}
// XXX Could be optimised by using a different database which only holds hashes (i.e., linked list)
for i := uint64(0); i < max; i++ {
chain = append(chain, block.Hash())
if block.Number.Cmp(ethutil.Big0) <= 0 {
break
}
block = self.GetBlock(block.PrevHash)
}
return
}
func (self *ChainManager) GetBlock(hash []byte) *types.Block {
data, _ := ethutil.Config.Db.Get(hash)
if len(data) == 0 {
return nil
}
return types.NewBlockFromBytes(data)
}
func (self *ChainManager) GetBlockByNumber(num uint64) *types.Block {
block := self.CurrentBlock
for ; block != nil; block = self.GetBlock(block.PrevHash) {
if block.Number.Uint64() == num {
break
}
}
if block != nil && block.Number.Uint64() == 0 && num != 0 {
return nil
}
return block
}
func (bc *ChainManager) SetTotalDifficulty(td *big.Int) {
ethutil.Config.Db.Put([]byte("LTD"), td.Bytes())
bc.TD = td
}
func (self *ChainManager) CalcTotalDiff(block *types.Block) (*big.Int, error) {
parent := self.GetBlock(block.PrevHash)
if parent == nil {
return nil, fmt.Errorf("Unable to calculate total diff without known parent %x", block.PrevHash)
}
parentTd := parent.BlockInfo().TD
uncleDiff := new(big.Int)
for _, uncle := range block.Uncles {
uncleDiff = uncleDiff.Add(uncleDiff, uncle.Difficulty)
}
td := new(big.Int)
td = td.Add(parentTd, uncleDiff)
td = td.Add(td, block.Difficulty)
return td, nil
}
func (bc *ChainManager) BlockInfo(block *types.Block) types.BlockInfo {
bi := types.BlockInfo{}
data, _ := ethutil.Config.Db.Get(append(block.Hash(), []byte("Info")...))
bi.RlpDecode(data)
return bi
}
// Unexported method for writing extra non-essential block info to the db
func (bc *ChainManager) writeBlockInfo(block *types.Block) {
bc.LastBlockNumber++
bi := types.BlockInfo{Number: bc.LastBlockNumber, Hash: block.Hash(), Parent: block.PrevHash, TD: bc.TD}
// For now we use the block hash with the words "info" appended as key
ethutil.Config.Db.Put(append(block.Hash(), []byte("Info")...), bi.RlpEncode())
}
func (bc *ChainManager) Stop() {
if bc.CurrentBlock != nil {
chainlogger.Infoln("Stopped")
}
}
func (self *ChainManager) InsertChain(chain types.Blocks) error {
for _, block := range chain {
td, messages, err := self.processor.Process(block)
if err != nil {
if IsKnownBlockErr(err) {
continue
}
chainlogger.Infof("block #%v process failed (%x)\n", block.Number, block.Hash()[:4])
chainlogger.Infoln(block)
chainlogger.Infoln(err)
return err
}
self.write(block)
if td.Cmp(self.TD) > 0 {
if block.Number.Cmp(new(big.Int).Add(self.CurrentBlock.Number, ethutil.Big1)) < 0 {
chainlogger.Infof("Split detected. New head #%v (%x), was #%v (%x)\n", block.Number, block.Hash()[:4], self.CurrentBlock.Number, self.CurrentBlock.Hash()[:4])
}
self.SetTotalDifficulty(td)
self.insert(block)
self.transState = self.State().Copy()
//sm.eth.TxPool().RemoveSet(block.Transactions())
}
self.eventMux.Post(NewBlockEvent{block})
self.eventMux.Post(messages)
}
return nil
}