From c47866d25174bd783ee6bcd5b400d81d7bf598bb Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Thu, 5 Mar 2015 09:14:58 +0100
Subject: Miner fixes and updates (including miner)

---
 core/block_processor.go |  7 ++-----
 core/chain_manager.go   | 28 +++++++++++++++++++---------
 core/genesis.go         |  5 +++--
 core/types/block.go     | 14 ++++++++------
 4 files changed, 32 insertions(+), 22 deletions(-)

(limited to 'core')

diff --git a/core/block_processor.go b/core/block_processor.go
index c2799dc48..34c12729c 100644
--- a/core/block_processor.go
+++ b/core/block_processor.go
@@ -253,9 +253,6 @@ func (sm *BlockProcessor) ValidateHeader(block, parent *types.Header) error {
 		return fmt.Errorf("Difficulty check failed for block %v, %v", block.Difficulty, expd)
 	}
 
-	//expl := CalcGasLimit(parent, block)
-	//if expl.Cmp(block.Header().GasLimit) != 0 {
-
 	// block.gasLimit - parent.gasLimit <= parent.gasLimit / 1024
 	a := new(big.Int).Sub(block.GasLimit, parent.GasLimit)
 	b := new(big.Int).Div(parent.GasLimit, big.NewInt(1024))
@@ -263,8 +260,8 @@ func (sm *BlockProcessor) ValidateHeader(block, parent *types.Header) error {
 		return fmt.Errorf("GasLimit check failed for block %v (%v > %v)", block.GasLimit, a, b)
 	}
 
-	if block.Time < parent.Time {
-		return ValidationError("Block timestamp not after prev block (%v - %v)", block.Time, parent.Time)
+	if block.Time <= parent.Time {
+		return ValidationError("Block timestamp not after or equal to prev block (%v - %v)", block.Time, parent.Time)
 	}
 
 	if int64(block.Time) > time.Now().Unix() {
diff --git a/core/chain_manager.go b/core/chain_manager.go
index f2382cf8d..d2a6560c1 100644
--- a/core/chain_manager.go
+++ b/core/chain_manager.go
@@ -31,15 +31,18 @@ type StateQuery interface {
 func CalcDifficulty(block, parent *types.Header) *big.Int {
 	diff := new(big.Int)
 
-	//adjust := new(big.Int).Rsh(parent.Difficulty(), 10)
-	//if block.Time() >= parent.Time()+8 {
-	adjust := new(big.Int).Div(parent.Difficulty, big.NewInt(2048))
+	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(GenesisDiff) < 0 {
+		return GenesisDiff
+	}
+
 	return diff
 }
 
@@ -378,9 +381,12 @@ func (bc *ChainManager) Stop() {
 }
 
 func (self *ChainManager) InsertChain(chain types.Blocks) error {
+	println("insert chain start")
 	self.tsmu.Lock()
 	defer self.tsmu.Unlock()
 
+	defer println("insert chain end")
+
 	for _, 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).
@@ -422,14 +428,18 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 		self.mu.Unlock()
 
 		if canonical {
-			jsonlogger.LogJson(&logger.EthChainNewHead{
-				BlockHash:     ethutil.Bytes2Hex(block.Hash()),
-				BlockNumber:   block.Number(),
-				ChainHeadHash: ethutil.Bytes2Hex(cblock.Hash()),
-				BlockPrevHash: ethutil.Bytes2Hex(block.ParentHash()),
-			})
+			/*
+				jsonlogger.LogJson(&logger.EthChainNewHead{
+					BlockHash:     ethutil.Bytes2Hex(block.Hash()),
+					BlockNumber:   block.Number(),
+					ChainHeadHash: ethutil.Bytes2Hex(cblock.Hash()),
+					BlockPrevHash: ethutil.Bytes2Hex(block.ParentHash()),
+				})
+			*/
 			self.setTransState(state.New(block.Root(), self.db))
 			self.eventMux.Post(ChainEvent{block, td})
+		} else {
+			//self.eventMux.
 		}
 
 		if split {
diff --git a/core/genesis.go b/core/genesis.go
index f675be53f..a3f5dfb38 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -22,8 +22,10 @@ var ZeroHash512 = make([]byte, 64)
 var EmptyShaList = crypto.Sha3(ethutil.Encode([]interface{}{}))
 var EmptyListRoot = crypto.Sha3(ethutil.Encode(""))
 
+var GenesisDiff = big.NewInt(131072)
+
 func GenesisBlock(db ethutil.Database) *types.Block {
-	genesis := types.NewBlock(ZeroHash256, ZeroHash160, nil, big.NewInt(2048), 42, "")
+	genesis := types.NewBlock(ZeroHash256, ZeroHash160, nil, GenesisDiff, 42, "")
 	genesis.Header().Number = ethutil.Big0
 	genesis.Header().GasLimit = big.NewInt(1000000)
 	genesis.Header().GasUsed = ethutil.Big0
@@ -53,7 +55,6 @@ func GenesisBlock(db ethutil.Database) *types.Block {
 	}
 	statedb.Sync()
 	genesis.Header().Root = statedb.Root()
-	fmt.Println(genesis)
 
 	return genesis
 }
diff --git a/core/types/block.go b/core/types/block.go
index 18a21e8c6..31c7c2b87 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -40,12 +40,12 @@ type Header struct {
 	Time uint64
 	// Extra data
 	Extra string
-	// Nonce
-	Nonce []byte
-	// Mix digest for quick checking to prevent DOS
-	MixDigest ethutil.Bytes
 	// SeedHash used for light client verification
 	SeedHash ethutil.Bytes
+	// Mix digest for quick checking to prevent DOS
+	MixDigest ethutil.Bytes
+	// Nonce
+	Nonce []byte
 }
 
 func (self *Header) rlpData(withNonce bool) []interface{} {
@@ -62,9 +62,11 @@ func (self *Header) rlpData(withNonce bool) []interface{} {
 		self.GasLimit,
 		self.GasUsed,
 		self.Time,
-		self.Extra}
+		self.Extra,
+		self.SeedHash,
+	}
 	if withNonce {
-		fields = append(fields, self.SeedHash, self.MixDigest, self.Nonce)
+		fields = append(fields, self.MixDigest, self.Nonce)
 	}
 
 	return fields
-- 
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