Renamed chain => core
This commit is contained in:
obscuren
276
core/chain_manager.go
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276
core/chain_manager.go
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@ -0,0 +1,276 @@
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package core
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import (
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/logger"
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)
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var chainlogger = logger.NewLogger("CHAIN")
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func AddTestNetFunds(block *types.Block) {
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for _, addr := range []string{
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"51ba59315b3a95761d0863b05ccc7a7f54703d99",
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"e4157b34ea9615cfbde6b4fda419828124b70c78",
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"b9c015918bdaba24b4ff057a92a3873d6eb201be",
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"6c386a4b26f73c802f34673f7248bb118f97424a",
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"cd2a3d9f938e13cd947ec05abc7fe734df8dd826",
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"2ef47100e0787b915105fd5e3f4ff6752079d5cb",
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"e6716f9544a56c530d868e4bfbacb172315bdead",
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"1a26338f0d905e295fccb71fa9ea849ffa12aaf4",
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} {
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codedAddr := ethutil.Hex2Bytes(addr)
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account := block.State().GetAccount(codedAddr)
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account.SetBalance(ethutil.Big("1606938044258990275541962092341162602522202993782792835301376")) //ethutil.BigPow(2, 200)
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block.State().UpdateStateObject(account)
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}
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}
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func CalcDifficulty(block, parent *types.Block) *big.Int {
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diff := new(big.Int)
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adjust := new(big.Int).Rsh(parent.Difficulty, 10)
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if block.Time >= parent.Time+5 {
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diff.Sub(parent.Difficulty, adjust)
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} else {
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diff.Add(parent.Difficulty, adjust)
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}
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return diff
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}
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type ChainManager struct {
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//eth EthManager
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processor types.BlockProcessor
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eventMux *event.TypeMux
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genesisBlock *types.Block
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// Last known total difficulty
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TD *big.Int
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LastBlockNumber uint64
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CurrentBlock *types.Block
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LastBlockHash []byte
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}
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func NewChainManager(mux *event.TypeMux) *ChainManager {
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bc := &ChainManager{}
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bc.genesisBlock = types.NewBlockFromBytes(ethutil.Encode(Genesis))
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bc.eventMux = mux
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bc.setLastBlock()
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return bc
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}
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func (self *ChainManager) SetProcessor(proc types.BlockProcessor) {
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self.processor = proc
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}
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func (bc *ChainManager) setLastBlock() {
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data, _ := ethutil.Config.Db.Get([]byte("LastBlock"))
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if len(data) != 0 {
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// Prep genesis
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AddTestNetFunds(bc.genesisBlock)
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block := types.NewBlockFromBytes(data)
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bc.CurrentBlock = block
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bc.LastBlockHash = block.Hash()
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bc.LastBlockNumber = block.Number.Uint64()
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// Set the last know difficulty (might be 0x0 as initial value, Genesis)
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bc.TD = ethutil.BigD(ethutil.Config.Db.LastKnownTD())
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} else {
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bc.Reset()
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}
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chainlogger.Infof("Last block (#%d) %x\n", bc.LastBlockNumber, bc.CurrentBlock.Hash())
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}
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// Block creation & chain handling
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func (bc *ChainManager) NewBlock(coinbase []byte) *types.Block {
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var root interface{}
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hash := ZeroHash256
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if bc.CurrentBlock != nil {
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root = bc.CurrentBlock.Root()
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hash = bc.LastBlockHash
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}
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block := types.CreateBlock(
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root,
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hash,
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coinbase,
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ethutil.BigPow(2, 32),
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nil,
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"")
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parent := bc.CurrentBlock
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if parent != nil {
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block.Difficulty = CalcDifficulty(block, parent)
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block.Number = new(big.Int).Add(bc.CurrentBlock.Number, ethutil.Big1)
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block.GasLimit = block.CalcGasLimit(bc.CurrentBlock)
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}
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return block
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}
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func (bc *ChainManager) Reset() {
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AddTestNetFunds(bc.genesisBlock)
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bc.genesisBlock.Trie().Sync()
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// Prepare the genesis block
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bc.add(bc.genesisBlock)
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bc.CurrentBlock = bc.genesisBlock
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bc.SetTotalDifficulty(ethutil.Big("0"))
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// Set the last know difficulty (might be 0x0 as initial value, Genesis)
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bc.TD = ethutil.BigD(ethutil.Config.Db.LastKnownTD())
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}
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// Add a block to the chain and record addition information
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func (bc *ChainManager) add(block *types.Block) {
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bc.writeBlockInfo(block)
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bc.CurrentBlock = block
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bc.LastBlockHash = block.Hash()
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encodedBlock := block.RlpEncode()
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ethutil.Config.Db.Put(block.Hash(), encodedBlock)
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ethutil.Config.Db.Put([]byte("LastBlock"), encodedBlock)
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//chainlogger.Infof("Imported block #%d (%x...)\n", block.Number, block.Hash()[0:4])
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}
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// Accessors
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func (bc *ChainManager) Genesis() *types.Block {
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return bc.genesisBlock
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}
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// Block fetching methods
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func (bc *ChainManager) HasBlock(hash []byte) bool {
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data, _ := ethutil.Config.Db.Get(hash)
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return len(data) != 0
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}
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func (self *ChainManager) GetChainHashesFromHash(hash []byte, max uint64) (chain [][]byte) {
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block := self.GetBlock(hash)
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if block == nil {
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return
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}
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// XXX Could be optimised by using a different database which only holds hashes (i.e., linked list)
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for i := uint64(0); i < max; i++ {
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chain = append(chain, block.Hash())
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if block.Number.Cmp(ethutil.Big0) <= 0 {
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break
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}
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block = self.GetBlock(block.PrevHash)
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}
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return
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}
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func (self *ChainManager) GetBlock(hash []byte) *types.Block {
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data, _ := ethutil.Config.Db.Get(hash)
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if len(data) == 0 {
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return nil
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}
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return types.NewBlockFromBytes(data)
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}
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func (self *ChainManager) GetBlockByNumber(num uint64) *types.Block {
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block := self.CurrentBlock
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for ; block != nil; block = self.GetBlock(block.PrevHash) {
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if block.Number.Uint64() == num {
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break
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}
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}
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if block != nil && block.Number.Uint64() == 0 && num != 0 {
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return nil
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}
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return block
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}
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func (bc *ChainManager) SetTotalDifficulty(td *big.Int) {
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ethutil.Config.Db.Put([]byte("LTD"), td.Bytes())
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bc.TD = td
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}
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func (self *ChainManager) CalcTotalDiff(block *types.Block) (*big.Int, error) {
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parent := self.GetBlock(block.PrevHash)
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if parent == nil {
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return nil, fmt.Errorf("Unable to calculate total diff without known parent %x", block.PrevHash)
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}
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parentTd := parent.BlockInfo().TD
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uncleDiff := new(big.Int)
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for _, uncle := range block.Uncles {
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uncleDiff = uncleDiff.Add(uncleDiff, uncle.Difficulty)
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}
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td := new(big.Int)
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td = td.Add(parentTd, uncleDiff)
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td = td.Add(td, block.Difficulty)
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return td, nil
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}
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func (bc *ChainManager) BlockInfo(block *types.Block) types.BlockInfo {
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bi := types.BlockInfo{}
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data, _ := ethutil.Config.Db.Get(append(block.Hash(), []byte("Info")...))
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bi.RlpDecode(data)
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return bi
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}
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// Unexported method for writing extra non-essential block info to the db
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func (bc *ChainManager) writeBlockInfo(block *types.Block) {
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bc.LastBlockNumber++
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bi := types.BlockInfo{Number: bc.LastBlockNumber, Hash: block.Hash(), Parent: block.PrevHash, TD: bc.TD}
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// For now we use the block hash with the words "info" appended as key
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ethutil.Config.Db.Put(append(block.Hash(), []byte("Info")...), bi.RlpEncode())
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}
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func (bc *ChainManager) Stop() {
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if bc.CurrentBlock != nil {
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chainlogger.Infoln("Stopped")
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}
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}
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func (self *ChainManager) InsertChain(chain types.Blocks) error {
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for _, block := range chain {
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td, messages, err := self.processor.Process(block)
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if err != nil {
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if IsKnownBlockErr(err) {
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continue
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}
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chainlogger.Infof("block #%v process failed (%x)\n", block.Number, block.Hash()[:4])
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chainlogger.Infoln(block)
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chainlogger.Infoln(err)
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return err
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}
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self.add(block)
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self.SetTotalDifficulty(td)
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self.eventMux.Post(NewBlockEvent{block})
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self.eventMux.Post(messages)
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}
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return nil
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}
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