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Fixed validation

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This commit is contained in:
obscuren 2014-01-12 16:50:09 +01:00
parent 406adb4563
commit c3fabfe00a
1 changed files with 20 additions and 3 deletions
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23
block_manager.go
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@ -24,11 +24,20 @@ func NewBlockChain() *BlockChain {
bc.TD = new(big.Int)
bc.TD.SetBytes(ethutil.Config.Db.LastKnownTD())
// TODO get last block from the database
//bc.LastBlock = bc.genesisBlock
return bc
}
func (bc *BlockChain) HasBlock(hash string) bool {
return bc.LastBlock.State().Get(hash) != ""
data, _ := ethutil.Config.Db.Get([]byte(hash))
return len(data) != 0
}
func (bc *BlockChain) GenesisBlock() *ethutil.Block {
return bc.genesisBlock
}
type BlockManager struct {
@ -107,6 +116,10 @@ func (bm *BlockManager) CalculateTD(block *ethutil.Block) bool {
// Set the new total difficulty back to the block chain
bm.bc.TD = td
if Debug {
log.Println("TD(block) =", td)
}
return true
}
@ -122,7 +135,8 @@ func (bm *BlockManager) ValidateBlock(block *ethutil.Block) error {
// Check if we have the parent hash, if it isn't known we discard it
// Reasons might be catching up or simply an invalid block
if !bm.bc.HasBlock(block.PrevHash) {
if bm.bc.LastBlock != nil && block.PrevHash == "" &&
!bm.bc.HasBlock(block.PrevHash) {
return errors.New("Block's parent unknown")
}
@ -139,10 +153,13 @@ func (bm *BlockManager) ValidateBlock(block *ethutil.Block) error {
}
// Verify the nonce of the block. Return an error if it's not valid
if !DaggerVerify(ethutil.BigD(block.Hash()), block.Difficulty, block.Nonce) {
if bm.bc.LastBlock != nil && block.PrevHash == "" &&
!DaggerVerify(ethutil.BigD(block.Hash()), block.Difficulty, block.Nonce) {
return errors.New("Block's nonce is invalid")
}
log.Println("Block validation PASSED")
return nil
}