roysc/plugeth
1
0
Fork 0
forked from cerc-io/plugeth
Code Pull Requests Activity

Get a chain of blocks made simple

Browse Source
This commit is contained in:
obscuren 2014-02-21 13:05:59 +01:00
parent 18cc35338a
commit cca8585554
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
ethchain/block_chain.go
View File

@ -2,6 +2,7 @@ package ethchain
import ( import (
"bytes" "bytes"
"fmt"
"github.com/ethereum/eth-go/ethutil" "github.com/ethereum/eth-go/ethutil"
"log" "log"
"math" "math"
@ -111,6 +112,25 @@ func (bc *BlockChain) GetChainFromHash(hash []byte, max uint64) []interface{} {
return chain 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() { func (bc *BlockChain) setLastBlock() {
data, _ := ethutil.Config.Db.Get([]byte("LastBlock")) data, _ := ethutil.Config.Db.Get([]byte("LastBlock"))
if len(data) != 0 { if len(data) != 0 {
@ -147,6 +167,9 @@ func (bc *BlockChain) Add(block *Block) {
func (bc *BlockChain) GetBlock(hash []byte) *Block { func (bc *BlockChain) GetBlock(hash []byte) *Block {
data, _ := ethutil.Config.Db.Get(hash) data, _ := ethutil.Config.Db.Get(hash)
if len(data) == 0 {
return nil
}
return NewBlockFromData(data) return NewBlockFromData(data)
} }