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| author | obscuren <geffobscura@gmail.com> | 2014-06-27 06:16:49 +0800 |
|---|---|---|
| committer | obscuren <geffobscura@gmail.com> | 2014-06-27 06:16:49 +0800 |
| commit | 423beddf574383ec58246938f738f08cd50f031a (patch) | |
| tree | 14b17e68208025e2edb968403666d1804137d24e | |
| parent | 8119d77a21d3973fe6379c5d57f393dda8fce392 (diff) | |
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nil check
| -rw-r--r-- | ethchain/block_chain.go | 9 |
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) |