roysc/plugeth
1
0
Fork 0
forked from cerc-io/plugeth
Code Pull Requests Activity

Merge pull request #1810 from karalabe/pure-header-verifications-2

Browse Source 
core, eth, miner: use pure header validation
This commit is contained in:
Jeffrey Wilcke 2015-09-16 14:21:12 -07:00
commit 58fbcaa750
4 changed files with 26 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

46
core/block_processor.go
View File

@ -214,7 +214,7 @@ func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (logs st
txs := block.Transactions()
// Block validation
if err = ValidateHeader(sm.Pow, header, parent, false, false); err != nil {
if err = ValidateHeader(sm.Pow, header, parent.Header(), false, false); err != nil {
return
}
@ -338,7 +338,7 @@ func (sm *BlockProcessor) VerifyUncles(statedb *state.StateDB, block, parent *ty
return UncleError("uncle[%d](%x)'s parent is not ancestor (%x)", i, hash[:4], uncle.ParentHash[0:4])
}
if err := ValidateHeader(sm.Pow, uncle, ancestors[uncle.ParentHash], true, true); err != nil {
if err := ValidateHeader(sm.Pow, uncle, ancestors[uncle.ParentHash].Header(), true, true); err != nil {
return ValidationError(fmt.Sprintf("uncle[%d](%x) header invalid: %v", i, hash[:4], err))
}
}
@ -368,52 +368,50 @@ func (sm *BlockProcessor) GetLogs(block *types.Block) (logs state.Logs, err erro
}
// See YP section 4.3.4. "Block Header Validity"
// Validates a block. Returns an error if the block is invalid.
func ValidateHeader(pow pow.PoW, block *types.Header, parent *types.Block, checkPow, uncle bool) error {
if big.NewInt(int64(len(block.Extra))).Cmp(params.MaximumExtraDataSize) == 1 {
return fmt.Errorf("Block extra data too long (%d)", len(block.Extra))
// Validates a header. Returns an error if the header is invalid.
func ValidateHeader(pow pow.PoW, header *types.Header, parent *types.Header, checkPow, uncle bool) error {
if big.NewInt(int64(len(header.Extra))).Cmp(params.MaximumExtraDataSize) == 1 {
return fmt.Errorf("Header extra data too long (%d)", len(header.Extra))
}
if uncle {
if block.Time.Cmp(common.MaxBig) == 1 {
if header.Time.Cmp(common.MaxBig) == 1 {
return BlockTSTooBigErr
}
} else {
if block.Time.Cmp(big.NewInt(time.Now().Unix())) == 1 {
if header.Time.Cmp(big.NewInt(time.Now().Unix())) == 1 {
return BlockFutureErr
}
}
if block.Time.Cmp(parent.Time()) != 1 {
if header.Time.Cmp(parent.Time) != 1 {
return BlockEqualTSErr
}
expd := CalcDifficulty(block.Time.Uint64(), parent.Time().Uint64(), parent.Number(), parent.Difficulty())
if expd.Cmp(block.Difficulty) != 0 {
return fmt.Errorf("Difficulty check failed for block %v, %v", block.Difficulty, expd)
expd := CalcDifficulty(header.Time.Uint64(), parent.Time.Uint64(), parent.Number, parent.Difficulty)
if expd.Cmp(header.Difficulty) != 0 {
return fmt.Errorf("Difficulty check failed for header %v, %v", header.Difficulty, expd)
}
var a, b *big.Int
a = parent.GasLimit()
a = a.Sub(a, block.GasLimit)
a := new(big.Int).Set(parent.GasLimit)
a = a.Sub(a, header.GasLimit)
a.Abs(a)
b = parent.GasLimit()
b := new(big.Int).Set(parent.GasLimit)
b = b.Div(b, params.GasLimitBoundDivisor)
if !(a.Cmp(b) < 0) || (block.GasLimit.Cmp(params.MinGasLimit) == -1) {
return fmt.Errorf("GasLimit check failed for block %v (%v > %v)", block.GasLimit, a, b)
if !(a.Cmp(b) < 0) || (header.GasLimit.Cmp(params.MinGasLimit) == -1) {
return fmt.Errorf("GasLimit check failed for header %v (%v > %v)", header.GasLimit, a, b)
}
num := parent.Number()
num.Sub(block.Number, num)
num := new(big.Int).Set(parent.Number)
num.Sub(header.Number, num)
if num.Cmp(big.NewInt(1)) != 0 {
return BlockNumberErr
}
if checkPow {
// Verify the nonce of the block. Return an error if it's not valid
if !pow.Verify(types.NewBlockWithHeader(block)) {
return ValidationError("Block's nonce is invalid (= %x)", block.Nonce)
// Verify the nonce of the header. Return an error if it's not valid
if !pow.Verify(types.NewBlockWithHeader(header)) {
return ValidationError("Header's nonce is invalid (= %x)", header.Nonce)
}
}
return nil
}

4
core/block_processor_test.go
View File

@ -48,13 +48,13 @@ func TestNumber(t *testing.T) {
statedb := state.New(chain.Genesis().Root(), chain.chainDb)
header := makeHeader(chain.Genesis(), statedb)
header.Number = big.NewInt(3)
err := ValidateHeader(pow, header, chain.Genesis(), false, false)
err := ValidateHeader(pow, header, chain.Genesis().Header(), false, false)
if err != BlockNumberErr {
t.Errorf("expected block number error, got %q", err)
}
header = makeHeader(chain.Genesis(), statedb)
err = ValidateHeader(pow, header, chain.Genesis(), false, false)
err = ValidateHeader(pow, header, chain.Genesis().Header(), false, false)
if err == BlockNumberErr {
t.Errorf("didn't expect block number error")
}

2
eth/handler.go
View File

@ -119,7 +119,7 @@ func NewProtocolManager(networkId int, mux *event.TypeMux, txpool txPool, pow po
manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.CurrentBlock, manager.chainman.GetTd, manager.chainman.InsertChain, manager.removePeer)
validator := func(block *types.Block, parent *types.Block) error {
return core.ValidateHeader(pow, block.Header(), parent, true, false)
return core.ValidateHeader(pow, block.Header(), parent.Header(), true, false)
}
heighter := func() uint64 {
return manager.chainman.CurrentBlock().NumberU64()

2
miner/worker.go
View File

@ -279,7 +279,7 @@ func (self *worker) wait() {
glog.V(logger.Error).Infoln("Invalid block found during mining")
continue
}
if err := core.ValidateHeader(self.eth.BlockProcessor().Pow, block.Header(), parent, true, false); err != nil && err != core.BlockFutureErr {
if err := core.ValidateHeader(self.eth.BlockProcessor().Pow, block.Header(), parent.Header(), true, false); err != nil && err != core.BlockFutureErr {
glog.V(logger.Error).Infoln("Invalid header on mined block:", err)
continue
}