mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-25 04:47:17 +00:00
517 lines
13 KiB
Go
517 lines
13 KiB
Go
package core
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"math/big"
|
|
"sync"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/event"
|
|
"github.com/ethereum/go-ethereum/logger"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
"github.com/ethereum/go-ethereum/state"
|
|
)
|
|
|
|
var (
|
|
chainlogger = logger.NewLogger("CHAIN")
|
|
jsonlogger = logger.NewJsonLogger()
|
|
|
|
blockHashPre = []byte("block-hash-")
|
|
blockNumPre = []byte("block-num-")
|
|
)
|
|
|
|
type StateQuery interface {
|
|
GetAccount(addr []byte) *state.StateObject
|
|
}
|
|
|
|
func CalcDifficulty(block, parent *types.Header) *big.Int {
|
|
diff := new(big.Int)
|
|
|
|
min := big.NewInt(2048)
|
|
adjust := new(big.Int).Div(parent.Difficulty, min)
|
|
if (block.Time - parent.Time) < 8 {
|
|
diff.Add(parent.Difficulty, adjust)
|
|
} else {
|
|
diff.Sub(parent.Difficulty, adjust)
|
|
}
|
|
|
|
if diff.Cmp(min) < 0 {
|
|
return min
|
|
}
|
|
|
|
return diff
|
|
}
|
|
|
|
func CalculateTD(block, parent *types.Block) *big.Int {
|
|
uncleDiff := new(big.Int)
|
|
for _, uncle := range block.Uncles() {
|
|
uncleDiff = uncleDiff.Add(uncleDiff, uncle.Difficulty)
|
|
}
|
|
|
|
// TD(genesis_block) = 0 and TD(B) = TD(B.parent) + sum(u.difficulty for u in B.uncles) + B.difficulty
|
|
td := new(big.Int)
|
|
td = td.Add(parent.Td, uncleDiff)
|
|
td = td.Add(td, block.Header().Difficulty)
|
|
|
|
return td
|
|
}
|
|
|
|
func CalcGasLimit(parent, block *types.Block) *big.Int {
|
|
if block.Number().Cmp(big.NewInt(0)) == 0 {
|
|
return common.BigPow(10, 6)
|
|
}
|
|
|
|
// ((1024-1) * parent.gasLimit + (gasUsed * 6 / 5)) / 1024
|
|
previous := new(big.Int).Mul(big.NewInt(1024-1), parent.GasLimit())
|
|
current := new(big.Rat).Mul(new(big.Rat).SetInt(parent.GasUsed()), big.NewRat(6, 5))
|
|
curInt := new(big.Int).Div(current.Num(), current.Denom())
|
|
|
|
result := new(big.Int).Add(previous, curInt)
|
|
result.Div(result, big.NewInt(1024))
|
|
|
|
return common.BigMax(GenesisGasLimit, result)
|
|
}
|
|
|
|
type ChainManager struct {
|
|
//eth EthManager
|
|
blockDb common.Database
|
|
stateDb common.Database
|
|
processor types.BlockProcessor
|
|
eventMux *event.TypeMux
|
|
genesisBlock *types.Block
|
|
// Last known total difficulty
|
|
mu sync.RWMutex
|
|
tsmu sync.RWMutex
|
|
td *big.Int
|
|
currentBlock *types.Block
|
|
lastBlockHash common.Hash
|
|
|
|
transState *state.StateDB
|
|
txState *state.ManagedState
|
|
|
|
quit chan struct{}
|
|
}
|
|
|
|
func NewChainManager(blockDb, stateDb common.Database, mux *event.TypeMux) *ChainManager {
|
|
bc := &ChainManager{blockDb: blockDb, stateDb: stateDb, genesisBlock: GenesisBlock(stateDb), eventMux: mux, quit: make(chan struct{})}
|
|
bc.setLastBlock()
|
|
bc.transState = bc.State().Copy()
|
|
// Take ownership of this particular state
|
|
bc.txState = state.ManageState(bc.State().Copy())
|
|
go bc.update()
|
|
|
|
return bc
|
|
}
|
|
|
|
func (self *ChainManager) Td() *big.Int {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
return self.td
|
|
}
|
|
|
|
func (self *ChainManager) LastBlockHash() common.Hash {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
return self.lastBlockHash
|
|
}
|
|
|
|
func (self *ChainManager) CurrentBlock() *types.Block {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
return self.currentBlock
|
|
}
|
|
|
|
func (self *ChainManager) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
return self.td, self.currentBlock.Hash(), self.genesisBlock.Hash()
|
|
}
|
|
|
|
func (self *ChainManager) SetProcessor(proc types.BlockProcessor) {
|
|
self.processor = proc
|
|
}
|
|
|
|
func (self *ChainManager) State() *state.StateDB {
|
|
return state.New(self.CurrentBlock().Root(), self.stateDb)
|
|
}
|
|
|
|
func (self *ChainManager) TransState() *state.StateDB {
|
|
self.tsmu.RLock()
|
|
defer self.tsmu.RUnlock()
|
|
|
|
return self.transState
|
|
}
|
|
|
|
func (self *ChainManager) TxState() *state.ManagedState {
|
|
self.tsmu.RLock()
|
|
defer self.tsmu.RUnlock()
|
|
|
|
return self.txState
|
|
}
|
|
|
|
func (self *ChainManager) setTxState(statedb *state.StateDB) {
|
|
self.tsmu.Lock()
|
|
defer self.tsmu.Unlock()
|
|
self.txState = state.ManageState(statedb)
|
|
}
|
|
|
|
func (self *ChainManager) setTransState(statedb *state.StateDB) {
|
|
self.transState = statedb
|
|
}
|
|
|
|
func (bc *ChainManager) setLastBlock() {
|
|
data, _ := bc.blockDb.Get([]byte("LastBlock"))
|
|
if len(data) != 0 {
|
|
block := bc.GetBlock(common.BytesToHash(data))
|
|
bc.currentBlock = block
|
|
bc.lastBlockHash = block.Hash()
|
|
|
|
// Set the last know difficulty (might be 0x0 as initial value, Genesis)
|
|
bc.td = common.BigD(bc.blockDb.LastKnownTD())
|
|
} else {
|
|
bc.Reset()
|
|
}
|
|
|
|
chainlogger.Infof("Last block (#%v) %x TD=%v\n", bc.currentBlock.Number(), bc.currentBlock.Hash(), bc.td)
|
|
}
|
|
|
|
// Block creation & chain handling
|
|
func (bc *ChainManager) NewBlock(coinbase common.Address) *types.Block {
|
|
bc.mu.RLock()
|
|
defer bc.mu.RUnlock()
|
|
|
|
var (
|
|
root common.Hash
|
|
parentHash common.Hash
|
|
)
|
|
|
|
if bc.currentBlock != nil {
|
|
root = bc.currentBlock.Header().Root
|
|
parentHash = bc.lastBlockHash
|
|
}
|
|
|
|
block := types.NewBlock(
|
|
parentHash,
|
|
coinbase,
|
|
root,
|
|
common.BigPow(2, 32),
|
|
0,
|
|
"")
|
|
block.SetUncles(nil)
|
|
block.SetTransactions(nil)
|
|
block.SetReceipts(nil)
|
|
|
|
parent := bc.currentBlock
|
|
if parent != nil {
|
|
header := block.Header()
|
|
header.Difficulty = CalcDifficulty(block.Header(), parent.Header())
|
|
header.Number = new(big.Int).Add(parent.Header().Number, common.Big1)
|
|
header.GasLimit = CalcGasLimit(parent, block)
|
|
|
|
}
|
|
|
|
return block
|
|
}
|
|
|
|
func (bc *ChainManager) Reset() {
|
|
bc.mu.Lock()
|
|
defer bc.mu.Unlock()
|
|
|
|
for block := bc.currentBlock; block != nil; block = bc.GetBlock(block.Header().ParentHash) {
|
|
bc.removeBlock(block)
|
|
}
|
|
|
|
// Prepare the genesis block
|
|
bc.write(bc.genesisBlock)
|
|
bc.insert(bc.genesisBlock)
|
|
bc.currentBlock = bc.genesisBlock
|
|
|
|
bc.setTotalDifficulty(common.Big("0"))
|
|
}
|
|
|
|
func (bc *ChainManager) removeBlock(block *types.Block) {
|
|
bc.blockDb.Delete(append(blockHashPre, block.Hash().Bytes()...))
|
|
}
|
|
|
|
func (bc *ChainManager) ResetWithGenesisBlock(gb *types.Block) {
|
|
bc.mu.Lock()
|
|
defer bc.mu.Unlock()
|
|
|
|
for block := bc.currentBlock; block != nil; block = bc.GetBlock(block.Header().ParentHash) {
|
|
bc.removeBlock(block)
|
|
}
|
|
|
|
// Prepare the genesis block
|
|
bc.genesisBlock = gb
|
|
bc.write(bc.genesisBlock)
|
|
bc.insert(bc.genesisBlock)
|
|
bc.currentBlock = bc.genesisBlock
|
|
}
|
|
|
|
// Export writes the active chain to the given writer.
|
|
func (self *ChainManager) Export(w io.Writer) error {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
chainlogger.Infof("exporting %v blocks...\n", self.currentBlock.Header().Number)
|
|
for block := self.currentBlock; block != nil; block = self.GetBlock(block.Header().ParentHash) {
|
|
if err := block.EncodeRLP(w); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (bc *ChainManager) insert(block *types.Block) {
|
|
bc.blockDb.Put([]byte("LastBlock"), block.Hash().Bytes())
|
|
bc.currentBlock = block
|
|
bc.lastBlockHash = block.Hash()
|
|
|
|
key := append(blockNumPre, block.Number().Bytes()...)
|
|
bc.blockDb.Put(key, bc.lastBlockHash.Bytes())
|
|
}
|
|
|
|
func (bc *ChainManager) write(block *types.Block) {
|
|
enc, _ := rlp.EncodeToBytes((*types.StorageBlock)(block))
|
|
key := append(blockHashPre, block.Hash().Bytes()...)
|
|
bc.blockDb.Put(key, enc)
|
|
}
|
|
|
|
// Accessors
|
|
func (bc *ChainManager) Genesis() *types.Block {
|
|
return bc.genesisBlock
|
|
}
|
|
|
|
// Block fetching methods
|
|
func (bc *ChainManager) HasBlock(hash common.Hash) bool {
|
|
data, _ := bc.blockDb.Get(append(blockHashPre, hash[:]...))
|
|
return len(data) != 0
|
|
}
|
|
|
|
func (self *ChainManager) GetBlockHashesFromHash(hash common.Hash, max uint64) (chain []common.Hash) {
|
|
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++ {
|
|
parentHash := block.Header().ParentHash
|
|
block = self.GetBlock(parentHash)
|
|
if block == nil {
|
|
chainlogger.Infof("GetBlockHashesFromHash Parent UNKNOWN %x\n", parentHash)
|
|
break
|
|
}
|
|
|
|
chain = append(chain, block.Hash())
|
|
if block.Header().Number.Cmp(common.Big0) <= 0 {
|
|
break
|
|
}
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (self *ChainManager) GetBlock(hash common.Hash) *types.Block {
|
|
data, _ := self.blockDb.Get(append(blockHashPre, hash[:]...))
|
|
if len(data) == 0 {
|
|
return nil
|
|
}
|
|
var block types.StorageBlock
|
|
if err := rlp.Decode(bytes.NewReader(data), &block); err != nil {
|
|
chainlogger.Errorf("invalid block RLP for hash %x: %v", hash, err)
|
|
return nil
|
|
}
|
|
return (*types.Block)(&block)
|
|
}
|
|
|
|
func (self *ChainManager) GetBlockByNumber(num uint64) *types.Block {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
key, _ := self.blockDb.Get(append(blockNumPre, big.NewInt(int64(num)).Bytes()...))
|
|
if len(key) == 0 {
|
|
return nil
|
|
}
|
|
|
|
return self.GetBlock(common.BytesToHash(key))
|
|
}
|
|
|
|
func (self *ChainManager) GetUnclesInChain(block *types.Block, length int) (uncles []*types.Header) {
|
|
for i := 0; block != nil && i < length; i++ {
|
|
uncles = append(uncles, block.Uncles()...)
|
|
block = self.GetBlock(block.ParentHash())
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (self *ChainManager) GetAncestors(block *types.Block, length int) (blocks []*types.Block) {
|
|
for i := 0; i < length; i++ {
|
|
block = self.GetBlock(block.ParentHash())
|
|
if block == nil {
|
|
break
|
|
}
|
|
|
|
blocks = append(blocks, block)
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
func (bc *ChainManager) setTotalDifficulty(td *big.Int) {
|
|
bc.blockDb.Put([]byte("LTD"), td.Bytes())
|
|
bc.td = td
|
|
}
|
|
|
|
func (self *ChainManager) CalcTotalDiff(block *types.Block) (*big.Int, error) {
|
|
parent := self.GetBlock(block.Header().ParentHash)
|
|
if parent == nil {
|
|
return nil, fmt.Errorf("Unable to calculate total diff without known parent %x", block.Header().ParentHash)
|
|
}
|
|
|
|
parentTd := parent.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.Header().Difficulty)
|
|
|
|
return td, nil
|
|
}
|
|
|
|
func (bc *ChainManager) Stop() {
|
|
close(bc.quit)
|
|
}
|
|
|
|
type queueEvent struct {
|
|
queue []interface{}
|
|
canonicalCount int
|
|
sideCount int
|
|
splitCount int
|
|
}
|
|
|
|
func (self *ChainManager) InsertChain(chain types.Blocks) error {
|
|
//self.tsmu.Lock()
|
|
//defer self.tsmu.Unlock()
|
|
|
|
// A queued approach to delivering events. This is generally faster than direct delivery and requires much less mutex acquiring.
|
|
var queue = make([]interface{}, len(chain))
|
|
var queueEvent = queueEvent{queue: queue}
|
|
for i, block := range chain {
|
|
// Call in to the block processor and check for errors. It's likely that if one block fails
|
|
// all others will fail too (unless a known block is returned).
|
|
td, err := self.processor.Process(block)
|
|
if err != nil {
|
|
if IsKnownBlockErr(err) {
|
|
continue
|
|
}
|
|
|
|
h := block.Header()
|
|
chainlogger.Infof("INVALID block #%v (%x)\n", h.Number, h.Hash().Bytes()[:4])
|
|
chainlogger.Infoln(err)
|
|
chainlogger.Debugln(block)
|
|
return err
|
|
}
|
|
block.Td = td
|
|
|
|
self.mu.Lock()
|
|
cblock := self.currentBlock
|
|
{
|
|
// Write block to database. Eventually we'll have to improve on this and throw away blocks that are
|
|
// not in the canonical chain.
|
|
self.write(block)
|
|
// Compare the TD of the last known block in the canonical chain to make sure it's greater.
|
|
// At this point it's possible that a different chain (fork) becomes the new canonical chain.
|
|
if td.Cmp(self.td) > 0 {
|
|
if block.Header().Number.Cmp(new(big.Int).Add(cblock.Header().Number, common.Big1)) < 0 {
|
|
chash := cblock.Hash()
|
|
hash := block.Hash()
|
|
chainlogger.Infof("Split detected. New head #%v (%x) TD=%v, was #%v (%x) TD=%v\n", block.Header().Number, hash[:4], td, cblock.Header().Number, chash[:4], self.td)
|
|
|
|
queue[i] = ChainSplitEvent{block}
|
|
queueEvent.splitCount++
|
|
}
|
|
|
|
self.setTotalDifficulty(td)
|
|
self.insert(block)
|
|
|
|
/* XXX crashes
|
|
jsonlogger.LogJson(&logger.EthChainNewHead{
|
|
BlockHash: common.Bytes2Hex(block.Hash()),
|
|
BlockNumber: block.Number(),
|
|
ChainHeadHash: common.Bytes2Hex(cblock.Hash()),
|
|
BlockPrevHash: common.Bytes2Hex(block.ParentHash()),
|
|
})
|
|
*/
|
|
|
|
self.setTransState(state.New(block.Root(), self.stateDb))
|
|
self.setTxState(state.New(block.Root(), self.stateDb))
|
|
|
|
queue[i] = ChainEvent{block}
|
|
queueEvent.canonicalCount++
|
|
} else {
|
|
queue[i] = ChainSideEvent{block}
|
|
queueEvent.sideCount++
|
|
}
|
|
}
|
|
self.mu.Unlock()
|
|
|
|
}
|
|
|
|
// XXX put this in a goroutine?
|
|
go self.eventMux.Post(queueEvent)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (self *ChainManager) update() {
|
|
events := self.eventMux.Subscribe(queueEvent{})
|
|
|
|
out:
|
|
for {
|
|
select {
|
|
case ev := <-events.Chan():
|
|
switch ev := ev.(type) {
|
|
case queueEvent:
|
|
for i, event := range ev.queue {
|
|
switch event := event.(type) {
|
|
case ChainEvent:
|
|
// We need some control over the mining operation. Acquiring locks and waiting for the miner to create new block takes too long
|
|
// and in most cases isn't even necessary.
|
|
if i == ev.canonicalCount {
|
|
self.eventMux.Post(ChainHeadEvent{event.Block})
|
|
}
|
|
case ChainSplitEvent:
|
|
// On chain splits we need to reset the transaction state. We can't be sure whether the actual
|
|
// state of the accounts are still valid.
|
|
if i == ev.splitCount {
|
|
self.setTxState(state.New(event.Block.Root(), self.stateDb))
|
|
}
|
|
}
|
|
|
|
self.eventMux.Post(event)
|
|
}
|
|
}
|
|
case <-self.quit:
|
|
break out
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
// Satisfy state query interface
|
|
func (self *ChainManager) GetAccount(addr common.Hash) *state.StateObject {
|
|
return self.State().GetAccount(addr)
|
|
}
|
|
*/
|