386 lines
9.1 KiB
Go
386 lines
9.1 KiB
Go
package chain
|
|
|
|
import (
|
|
"bytes"
|
|
"container/list"
|
|
"fmt"
|
|
"math/big"
|
|
|
|
"github.com/ethereum/go-ethereum/ethutil"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/state"
|
|
)
|
|
|
|
var chainlogger = logger.NewLogger("CHAIN")
|
|
|
|
type ChainManager struct {
|
|
Ethereum EthManager
|
|
// The famous, the fabulous Mister GENESIIIIIIS (block)
|
|
genesisBlock *Block
|
|
// Last known total difficulty
|
|
TD *big.Int
|
|
|
|
LastBlockNumber uint64
|
|
|
|
CurrentBlock *Block
|
|
LastBlockHash []byte
|
|
|
|
workingChain *BlockChain
|
|
}
|
|
|
|
func NewChainManager(ethereum EthManager) *ChainManager {
|
|
bc := &ChainManager{}
|
|
bc.genesisBlock = NewBlockFromBytes(ethutil.Encode(Genesis))
|
|
bc.Ethereum = ethereum
|
|
|
|
bc.setLastBlock()
|
|
|
|
return bc
|
|
}
|
|
|
|
func (bc *ChainManager) Genesis() *Block {
|
|
return bc.genesisBlock
|
|
}
|
|
|
|
func (bc *ChainManager) NewBlock(coinbase []byte) *Block {
|
|
var root interface{}
|
|
hash := ZeroHash256
|
|
|
|
if bc.CurrentBlock != nil {
|
|
root = bc.CurrentBlock.Root()
|
|
hash = bc.LastBlockHash
|
|
}
|
|
|
|
block := CreateBlock(
|
|
root,
|
|
hash,
|
|
coinbase,
|
|
ethutil.BigPow(2, 32),
|
|
nil,
|
|
"")
|
|
|
|
block.MinGasPrice = big.NewInt(10000000000000)
|
|
|
|
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 CalcDifficulty(block, parent *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
|
|
}
|
|
|
|
func (bc *ChainManager) Reset() {
|
|
AddTestNetFunds(bc.genesisBlock)
|
|
|
|
bc.genesisBlock.state.Trie.Sync()
|
|
// Prepare the genesis block
|
|
bc.add(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) HasBlock(hash []byte) bool {
|
|
data, _ := ethutil.Config.Db.Get(hash)
|
|
return len(data) != 0
|
|
}
|
|
|
|
// TODO: At one point we might want to save a block by prevHash in the db to optimise this...
|
|
func (bc *ChainManager) HasBlockWithPrevHash(hash []byte) bool {
|
|
block := bc.CurrentBlock
|
|
|
|
for ; block != nil; block = bc.GetBlock(block.PrevHash) {
|
|
if bytes.Compare(hash, block.PrevHash) == 0 {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (bc *ChainManager) CalculateBlockTD(block *Block) *big.Int {
|
|
blockDiff := new(big.Int)
|
|
|
|
for _, uncle := range block.Uncles {
|
|
blockDiff = blockDiff.Add(blockDiff, uncle.Difficulty)
|
|
}
|
|
blockDiff = blockDiff.Add(blockDiff, block.Difficulty)
|
|
|
|
return blockDiff
|
|
}
|
|
|
|
func (bc *ChainManager) GenesisBlock() *Block {
|
|
return bc.genesisBlock
|
|
}
|
|
|
|
func (self *ChainManager) GetChainHashesFromHash(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 AddTestNetFunds(block *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 (bc *ChainManager) setLastBlock() {
|
|
data, _ := ethutil.Config.Db.Get([]byte("LastBlock"))
|
|
if len(data) != 0 {
|
|
// Prep genesis
|
|
AddTestNetFunds(bc.genesisBlock)
|
|
|
|
block := 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())
|
|
}
|
|
|
|
func (bc *ChainManager) SetTotalDifficulty(td *big.Int) {
|
|
ethutil.Config.Db.Put([]byte("LTD"), td.Bytes())
|
|
bc.TD = td
|
|
}
|
|
|
|
// Add a block to the chain and record addition information
|
|
func (bc *ChainManager) add(block *Block) {
|
|
bc.writeBlockInfo(block)
|
|
|
|
bc.CurrentBlock = block
|
|
bc.LastBlockHash = block.Hash()
|
|
|
|
encodedBlock := block.RlpEncode()
|
|
ethutil.Config.Db.Put(block.Hash(), encodedBlock)
|
|
ethutil.Config.Db.Put([]byte("LastBlock"), encodedBlock)
|
|
|
|
//chainlogger.Infof("Imported block #%d (%x...)\n", block.Number, block.Hash()[0:4])
|
|
}
|
|
|
|
func (self *ChainManager) CalcTotalDiff(block *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 (self *ChainManager) GetBlock(hash []byte) *Block {
|
|
data, _ := ethutil.Config.Db.Get(hash)
|
|
if len(data) == 0 {
|
|
if self.workingChain != nil {
|
|
// Check the temp chain
|
|
for e := self.workingChain.Front(); e != nil; e = e.Next() {
|
|
if bytes.Compare(e.Value.(*link).block.Hash(), hash) == 0 {
|
|
return e.Value.(*link).block
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
return NewBlockFromBytes(data)
|
|
}
|
|
|
|
func (self *ChainManager) GetBlockByNumber(num uint64) *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 (self *ChainManager) GetBlockBack(num uint64) *Block {
|
|
block := self.CurrentBlock
|
|
|
|
for ; num != 0 && block != nil; num-- {
|
|
block = self.GetBlock(block.PrevHash)
|
|
}
|
|
|
|
return block
|
|
}
|
|
|
|
func (bc *ChainManager) BlockInfoByHash(hash []byte) BlockInfo {
|
|
bi := BlockInfo{}
|
|
data, _ := ethutil.Config.Db.Get(append(hash, []byte("Info")...))
|
|
bi.RlpDecode(data)
|
|
|
|
return bi
|
|
}
|
|
|
|
func (bc *ChainManager) BlockInfo(block *Block) BlockInfo {
|
|
bi := 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 *Block) {
|
|
bc.LastBlockNumber++
|
|
bi := 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")
|
|
}
|
|
}
|
|
|
|
type link struct {
|
|
block *Block
|
|
messages state.Messages
|
|
td *big.Int
|
|
}
|
|
|
|
type BlockChain struct {
|
|
*list.List
|
|
}
|
|
|
|
func NewChain(blocks Blocks) *BlockChain {
|
|
chain := &BlockChain{list.New()}
|
|
|
|
for _, block := range blocks {
|
|
chain.PushBack(&link{block, nil, nil})
|
|
}
|
|
|
|
return chain
|
|
}
|
|
|
|
// This function assumes you've done your checking. No checking is done at this stage anymore
|
|
func (self *ChainManager) InsertChain(chain *BlockChain) {
|
|
for e := chain.Front(); e != nil; e = e.Next() {
|
|
link := e.Value.(*link)
|
|
|
|
self.add(link.block)
|
|
self.SetTotalDifficulty(link.td)
|
|
self.Ethereum.EventMux().Post(NewBlockEvent{link.block})
|
|
self.Ethereum.EventMux().Post(link.messages)
|
|
}
|
|
|
|
b, e := chain.Front(), chain.Back()
|
|
if b != nil && e != nil {
|
|
front, back := b.Value.(*link).block, e.Value.(*link).block
|
|
chainlogger.Infof("Imported %d blocks. #%v (%x) / %#v (%x)", chain.Len(), front.Number, front.Hash()[0:4], back.Number, back.Hash()[0:4])
|
|
}
|
|
}
|
|
|
|
func (self *ChainManager) TestChain(chain *BlockChain) (td *big.Int, err error) {
|
|
self.workingChain = chain
|
|
defer func() { self.workingChain = nil }()
|
|
|
|
for e := chain.Front(); e != nil; e = e.Next() {
|
|
var (
|
|
l = e.Value.(*link)
|
|
block = l.block
|
|
parent = self.GetBlock(block.PrevHash)
|
|
)
|
|
|
|
//fmt.Println("parent", parent)
|
|
//fmt.Println("current", block)
|
|
|
|
if parent == nil {
|
|
err = fmt.Errorf("incoming chain broken on hash %x\n", block.PrevHash[0:4])
|
|
return
|
|
}
|
|
|
|
var messages state.Messages
|
|
td, messages, err = self.Ethereum.BlockManager().ProcessWithParent(block, parent)
|
|
if err != nil {
|
|
chainlogger.Infoln(err)
|
|
chainlogger.Debugf("Block #%v failed (%x...)\n", block.Number, block.Hash()[0:4])
|
|
chainlogger.Debugln(block)
|
|
|
|
err = fmt.Errorf("incoming chain failed %v\n", err)
|
|
return
|
|
}
|
|
l.td = td
|
|
l.messages = messages
|
|
}
|
|
|
|
if td.Cmp(self.TD) <= 0 {
|
|
err = &TDError{td, self.TD}
|
|
return
|
|
}
|
|
|
|
self.workingChain = nil
|
|
|
|
return
|
|
}
|