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authorobscuren <geffobscura@gmail.com>2014-06-27 06:16:49 +0800
committerobscuren <geffobscura@gmail.com>2014-06-27 06:16:49 +0800
commit423beddf574383ec58246938f738f08cd50f031a (patch)
tree14b17e68208025e2edb968403666d1804137d24e /ethchain
parent8119d77a21d3973fe6379c5d57f393dda8fce392 (diff)
downloaddexon-423beddf574383ec58246938f738f08cd50f031a.tar.gz
dexon-423beddf574383ec58246938f738f08cd50f031a.tar.zst
dexon-423beddf574383ec58246938f738f08cd50f031a.zip
nil check
Diffstat (limited to 'ethchain')
-rw-r--r--ethchain/block_chain.go9
1 files changed, 8 insertions, 1 deletions
diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go
index d0fea6641..6e4c72b27 100644
--- a/ethchain/block_chain.go
+++ b/ethchain/block_chain.go
@@ -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)