369 lines
8.8 KiB
Go
369 lines
8.8 KiB
Go
package chain
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import (
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"bytes"
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"container/list"
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"fmt"
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"math/big"
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"github.com/ethereum/go-ethereum/chain/types"
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"github.com/ethereum/go-ethereum/ethutil"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/state"
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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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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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workingChain *BlockChain
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}
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func NewChainManager() *ChainManager {
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bc := &ChainManager{}
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bc.genesisBlock = types.NewBlockFromBytes(ethutil.Encode(Genesis))
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//bc.eth = ethereum
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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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block.MinGasPrice = big.NewInt(10000000000000)
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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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if self.workingChain != nil {
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// Check the temp chain
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for e := self.workingChain.Front(); e != nil; e = e.Next() {
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if bytes.Compare(e.Value.(*link).Block.Hash(), hash) == 0 {
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return e.Value.(*link).Block
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}
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}
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}
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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) NewIterator(startHash []byte) *ChainIterator {
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return &ChainIterator{self, self.GetBlock(startHash)}
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}
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// This function assumes you've done your checking. No checking is done at this stage anymore
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func (self *ChainManager) InsertChain(chain *BlockChain, call func(*types.Block, state.Messages)) {
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for e := chain.Front(); e != nil; e = e.Next() {
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link := e.Value.(*link)
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self.add(link.Block)
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self.SetTotalDifficulty(link.Td)
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call(link.Block, link.Messages)
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}
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b, e := chain.Front(), chain.Back()
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if b != nil && e != nil {
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front, back := b.Value.(*link).Block, e.Value.(*link).Block
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chainlogger.Infof("Imported %d blocks. #%v (%x) / %#v (%x)", chain.Len(), front.Number, front.Hash()[0:4], back.Number, back.Hash()[0:4])
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}
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}
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func (self *ChainManager) TestChain(chain *BlockChain) (td *big.Int, err error) {
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self.workingChain = chain
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defer func() { self.workingChain = nil }()
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for e := chain.Front(); e != nil; e = e.Next() {
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var (
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l = e.Value.(*link)
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block = l.Block
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parent = self.GetBlock(block.PrevHash)
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)
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if parent == nil {
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err = fmt.Errorf("incoming chain broken on hash %x\n", block.PrevHash[0:4])
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return
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}
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var messages state.Messages
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td, messages, err = self.processor.ProcessWithParent(block, parent) //self.eth.BlockManager().ProcessWithParent(block, parent)
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if err != nil {
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chainlogger.Infoln(err)
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chainlogger.Debugf("Block #%v failed (%x...)\n", block.Number, block.Hash()[0:4])
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chainlogger.Debugln(block)
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err = fmt.Errorf("incoming chain failed %v\n", err)
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return
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}
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l.Td = td
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l.Messages = messages
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}
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if td.Cmp(self.TD) <= 0 {
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err = &TDError{td, self.TD}
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return
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}
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self.workingChain = nil
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return
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}
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type link struct {
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Block *types.Block
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Messages state.Messages
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Td *big.Int
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}
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type BlockChain struct {
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*list.List
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}
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func NewChain(blocks types.Blocks) *BlockChain {
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chain := &BlockChain{list.New()}
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for _, block := range blocks {
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chain.PushBack(&link{block, nil, nil})
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}
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return chain
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}
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func (self *BlockChain) RlpEncode() []byte {
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dat := make([]interface{}, 0)
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for e := self.Front(); e != nil; e = e.Next() {
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dat = append(dat, e.Value.(*link).Block.RlpData())
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}
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return ethutil.Encode(dat)
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}
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type ChainIterator struct {
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cm *ChainManager
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block *types.Block // current block in the iterator
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}
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func (self *ChainIterator) Prev() *types.Block {
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self.block = self.cm.GetBlock(self.block.PrevHash)
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return self.block
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}
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