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nil check

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obscuren 2014-06-27 00:16:49 +02:00
parent 8119d77a21
commit 423beddf57
1 changed files with 8 additions and 1 deletions
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9
ethchain/block_chain.go
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@ -221,9 +221,16 @@ func (bc *BlockChain) GetChainFromHash(hash []byte, max uint64) []interface{} {
startNumber := parentNumber + count
num := lastNumber
for ; num > startNumber; currentHash = bc.GetBlock(currentHash).PrevHash {
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)