diff options
| -rw-r--r-- | ethchain/block_chain.go | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/ethchain/block_chain.go b/ethchain/block_chain.go index 5b55782a9..21f540b96 100644 --- a/ethchain/block_chain.go +++ b/ethchain/block_chain.go @@ -2,6 +2,7 @@ package ethchain import ( "bytes" + "fmt" "github.com/ethereum/eth-go/ethutil" "log" "math" @@ -111,6 +112,25 @@ func (bc *BlockChain) GetChainFromHash(hash []byte, max uint64) []interface{} { return chain } +func (bc *BlockChain) GetChain(hash []byte, amount int) []*Block { + genHash := bc.genesisBlock.Hash() + + block := bc.GetBlock(hash) + var blocks []*Block + + for i := 0; i < amount && block != nil; block = bc.GetBlock(block.PrevHash) { + fmt.Println(block) + blocks = append([]*Block{block}, blocks...) + + if bytes.Compare(genHash, block.Hash()) == 0 { + break + } + i++ + } + + return blocks +} + func (bc *BlockChain) setLastBlock() { data, _ := ethutil.Config.Db.Get([]byte("LastBlock")) if len(data) != 0 { @@ -147,6 +167,9 @@ func (bc *BlockChain) Add(block *Block) { func (bc *BlockChain) GetBlock(hash []byte) *Block { data, _ := ethutil.Config.Db.Get(hash) + if len(data) == 0 { + return nil + } return NewBlockFromData(data) } |