Removed old chain code

3 files changed, 5 insertions, 209 deletions

diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go
index 3445bbb87..3b2914a37 100644
--- a/ethchain/block_chain.go
+++ b/ethchain/block_chain.go
@@ -2,12 +2,10 @@ package ethchain
 
 import (
 	"bytes"
-	"math"
 	"math/big"
 
 	"github.com/ethereum/eth-go/ethlog"
 	"github.com/ethereum/eth-go/ethutil"
-	"github.com/ethereum/eth-go/ethwire"
 )
 
 var chainlogger = ethlog.NewLogger("CHAIN")
@@ -110,99 +108,6 @@ func (bc *BlockChain) CalculateBlockTD(block *Block) *big.Int {
 
 	return blockDiff
 }
-func (bc *BlockChain) FindCanonicalChainFromMsg(msg *ethwire.Msg, commonBlockHash []byte) bool {
-	var blocks []*Block
-	for i := 0; i < (msg.Data.Len() - 1); i++ {
-		block := NewBlockFromRlpValue(msg.Data.Get(i))
-		blocks = append(blocks, block)
-	}
-	return bc.FindCanonicalChain(blocks, commonBlockHash)
-}
-
-// Is tasked by finding the CanonicalChain and resetting the chain if we are not the Conical one
-// Return true if we are the using the canonical chain false if not
-func (bc *BlockChain) FindCanonicalChain(blocks []*Block, commonBlockHash []byte) bool {
-	// 1. Calculate TD of the current chain
-	// 2. Calculate TD of the new chain
-	// Reset state to the correct one
-
-	chainDifficulty := new(big.Int)
-
-	// Calculate the entire chain until the block we both have
-	// Start with the newest block we got, all the way back to the common block we both know
-	for _, block := range blocks {
-		if bytes.Compare(block.Hash(), commonBlockHash) == 0 {
-			chainlogger.Infoln("We have found the common parent block, breaking")
-			break
-		}
-		chainDifficulty.Add(chainDifficulty, bc.CalculateBlockTD(block))
-	}
-
-	chainlogger.Infoln("Incoming chain difficulty:", chainDifficulty)
-
-	curChainDifficulty := new(big.Int)
-	block := bc.CurrentBlock
-	for i := 0; block != nil; block = bc.GetBlock(block.PrevHash) {
-		i++
-		if bytes.Compare(block.Hash(), commonBlockHash) == 0 {
-			chainlogger.Infoln("Found the common parent block")
-			break
-		}
-		anOtherBlock := bc.GetBlock(block.PrevHash)
-		if anOtherBlock == nil {
-			// We do not want to count the genesis block for difficulty since that's not being sent
-			chainlogger.Infoln("Found genesis block. Stop")
-			break
-		}
-		curChainDifficulty.Add(curChainDifficulty, bc.CalculateBlockTD(block))
-	}
-
-	chainlogger.Infoln("Current chain difficulty:", curChainDifficulty)
-	if chainDifficulty.Cmp(curChainDifficulty) == 1 {
-		chainlogger.Infof("Resetting to block %x. Changing chain.")
-		bc.ResetTillBlockHash(commonBlockHash)
-		return false
-	} else {
-		chainlogger.Infoln("Current chain is longest chain. Ignoring incoming chain.")
-		return true
-	}
-}
-func (bc *BlockChain) ResetTillBlockHash(hash []byte) error {
-	lastBlock := bc.CurrentBlock
-	var returnTo *Block
-	// Reset to Genesis if that's all the origin there is.
-	if bytes.Compare(hash, bc.genesisBlock.Hash()) == 0 {
-		returnTo = bc.genesisBlock
-		bc.CurrentBlock = bc.genesisBlock
-		bc.LastBlockHash = bc.genesisBlock.Hash()
-		bc.LastBlockNumber = 1
-	} else {
-		returnTo = bc.GetBlock(hash)
-		bc.CurrentBlock = returnTo
-		bc.LastBlockHash = returnTo.Hash()
-		bc.LastBlockNumber = returnTo.Number.Uint64()
-	}
-
-	// Manually reset the last sync block
-	err := ethutil.Config.Db.Delete(lastBlock.Hash())
-	if err != nil {
-		return err
-	}
-
-	var block *Block
-	for ; block != nil; block = bc.GetBlock(block.PrevHash) {
-		if bytes.Compare(block.Hash(), hash) == 0 {
-			chainlogger.Infoln("We have arrived at the the common parent block, breaking")
-			break
-		}
-		err = ethutil.Config.Db.Delete(block.Hash())
-		if err != nil {
-			return err
-		}
-	}
-	chainlogger.Infoln("Split chain deleted and reverted to common parent block.")
-	return nil
-}
 
 func (bc *BlockChain) GenesisBlock() *Block {
 	return bc.genesisBlock
@@ -228,66 +133,6 @@ func (self *BlockChain) GetChainHashesFromHash(hash []byte, max uint64) (chain [
 	return
 }
 
-// Get chain return blocks from hash up to max in RLP format
-func (bc *BlockChain) GetChainFromHash(hash []byte, max uint64) []interface{} {
-	var chain []interface{}
-	// Get the current hash to start with
-	currentHash := bc.CurrentBlock.Hash()
-	// Get the last number on the block chain
-	lastNumber := bc.CurrentBlock.Number.Uint64()
-	// Get the parents number
-	parentNumber := bc.GetBlock(hash).Number.Uint64()
-	// Get the min amount. We might not have max amount of blocks
-	count := uint64(math.Min(float64(lastNumber-parentNumber), float64(max)))
-	startNumber := parentNumber + count
-
-	num := lastNumber
-	for num > startNumber {
-		num--
-
-		block := bc.GetBlock(currentHash)
-		if block == nil {
-			break
-		}
-		currentHash = block.PrevHash
-	}
-
-	for i := uint64(0); bytes.Compare(currentHash, hash) != 0 && num >= parentNumber && i < count; i++ {
-		// Get the block of the chain
-		block := bc.GetBlock(currentHash)
-		if block == nil {
-			chainlogger.Debugf("Unexpected error during GetChainFromHash: Unable to find %x\n", currentHash)
-			break
-		}
-
-		currentHash = block.PrevHash
-
-		chain = append(chain, block.Value().Val)
-
-		num--
-	}
-
-	return chain
-}
-
-func (bc *BlockChain) GetChain(hash []byte, amount int) []*Block {
-	genHash := bc.genesisBlock.Hash()
-
-	block := bc.GetBlock(hash)
-	var blocks []*Block
-
-	for i := 0; i < amount && block != nil; block = bc.GetBlock(block.PrevHash) {
-		blocks = append([]*Block{block}, blocks...)
-
-		if bytes.Compare(genHash, block.Hash()) == 0 {
-			break
-		}
-		i++
-	}
-
-	return blocks
-}
-
 func AddTestNetFunds(block *Block) {
 	for _, addr := range []string{
 		"51ba59315b3a95761d0863b05ccc7a7f54703d99",
diff --git a/ethchain/state_transition.go b/ethchain/state_transition.go
index 9fbc160a5..80f9fda5e 100644
--- a/ethchain/state_transition.go
+++ b/ethchain/state_transition.go
@@ -140,7 +140,7 @@ func (self *StateTransition) preCheck() (err error) {
 }
 
 func (self *StateTransition) TransitionState() (err error) {
-	statelogger.Infof("(~) %x\n", self.tx.Hash())
+	statelogger.Debugf("(~) %x\n", self.tx.Hash())
 
 	/*
 		defer func() {
diff --git a/peer.go b/peer.go
index ab17466e1..79a58d28e 100644
--- a/peer.go
+++ b/peer.go
@@ -474,7 +474,7 @@ func (p *Peer) HandleInbound() {
 				for it.Next() {
 					block := ethchain.NewBlockFromRlpValue(it.Value())
 
-					blockPool.SetBlock(block)
+					blockPool.SetBlock(block, p)
 
 					p.lastBlockReceived = time.Now()
 				}
@@ -507,6 +507,7 @@ func (self *Peer) FetchHashes() {
 
 	if self.td.Cmp(blockPool.td) >= 0 {
 		peerlogger.Debugf("Requesting hashes from %x\n", self.lastReceivedHash)
+		blockPool.td = self.td
 
 		if !blockPool.HasLatestHash() {
 			self.QueueMessage(ethwire.NewMessage(ethwire.MsgGetBlockHashesTy, []interface{}{self.lastReceivedHash, uint32(200)}))
@@ -625,7 +626,6 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 
 	usedPub := 0
 	// This peer is already added to the peerlist so we expect to find a double pubkey at least once
-
 	eachPeer(p.ethereum.Peers(), func(peer *Peer, e *list.Element) {
 		if bytes.Compare(p.pubkey, peer.pubkey) == 0 {
 			usedPub++
@@ -644,7 +644,6 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 		return
 	}
 
-	// [PROTOCOL_VERSION, NETWORK_ID, CLIENT_ID, CAPS, PORT, PUBKEY]
 	p.versionKnown = true
 
 	// If this is an inbound connection send an ack back
@@ -680,15 +679,8 @@ func (p *Peer) handleHandshake(msg *ethwire.Msg) {
 
 	ethlogger.Infof("Added peer (%s) %d / %d (TD = %v ~ %x)\n", p.conn.RemoteAddr(), p.ethereum.Peers().Len(), p.ethereum.MaxPeers, p.td, p.bestHash)
 
-	/*
-		// Catch up with the connected peer
-		if !p.ethereum.IsUpToDate() {
-			peerlogger.Debugln("Already syncing up with a peer; sleeping")
-			time.Sleep(10 * time.Second)
-		}
-	*/
-	//p.SyncWithPeerToLastKnown()
-
+	// Compare the total TD with the blockchain TD. If remote is higher
+	// fetch hashes from highest TD node.
 	if p.td.Cmp(p.ethereum.BlockChain().TD) > 0 {
 		p.ethereum.blockPool.AddHash(p.lastReceivedHash)
 		p.FetchHashes()
@@ -714,47 +706,6 @@ func (p *Peer) String() string {
 	return fmt.Sprintf("[%s] (%s) %v %s [%s]", strConnectType, strBoundType, p.conn.RemoteAddr(), p.version, p.caps)
 
 }
-func (p *Peer) SyncWithPeerToLastKnown() {
-	p.catchingUp = false
-	p.CatchupWithPeer(p.ethereum.BlockChain().CurrentBlock.Hash())
-}
-
-func (p *Peer) FindCommonParentBlock() {
-	if p.catchingUp {
-		return
-	}
-
-	p.catchingUp = true
-	if p.blocksRequested == 0 {
-		p.blocksRequested = 20
-	}
-	blocks := p.ethereum.BlockChain().GetChain(p.ethereum.BlockChain().CurrentBlock.Hash(), p.blocksRequested)
-
-	var hashes []interface{}
-	for _, block := range blocks {
-		hashes = append(hashes, block.Hash())
-	}
-
-	msgInfo := append(hashes, uint64(len(hashes)))
-
-	peerlogger.DebugDetailf("Asking for block from %x (%d total) from %s\n", p.ethereum.BlockChain().CurrentBlock.Hash(), len(hashes), p.conn.RemoteAddr().String())
-
-	msg := ethwire.NewMessage(ethwire.MsgGetChainTy, msgInfo)
-	p.QueueMessage(msg)
-}
-func (p *Peer) CatchupWithPeer(blockHash []byte) {
-	if !p.catchingUp {
-		// Make sure nobody else is catching up when you want to do this
-		p.catchingUp = true
-		msg := ethwire.NewMessage(ethwire.MsgGetChainTy, []interface{}{blockHash, uint64(100)})
-		p.QueueMessage(msg)
-
-		peerlogger.DebugDetailf("Requesting blockchain %x... from peer %s\n", p.ethereum.BlockChain().CurrentBlock.Hash()[:4], p.conn.RemoteAddr())
-
-		msg = ethwire.NewMessage(ethwire.MsgGetTxsTy, []interface{}{})
-		p.QueueMessage(msg)
-	}
-}
 
 func (p *Peer) RlpData() []interface{} {
 	return []interface{}{p.host, p.port, p.pubkey}