Exemplo n.º 1
0
func hasAllBlocks(chain *core.ChainManager, bs []*types.Block) bool {
	for _, b := range bs {
		if !chain.HasBlock(b.Hash()) {
			return false
		}
	}
	return true
}
Exemplo n.º 2
0
func ExportChain(chainmgr *core.ChainManager, fn string) error {
	glog.Infoln("Exporting blockchain to", fn)
	fh, err := os.OpenFile(fn, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
	if err != nil {
		return err
	}
	defer fh.Close()
	if err := chainmgr.Export(fh); err != nil {
		return err
	}
	glog.Infoln("Exported blockchain to", fn)
	return nil
}
Exemplo n.º 3
0
func ExportAppendChain(chainmgr *core.ChainManager, fn string, first uint64, last uint64) error {
	glog.Infoln("Exporting blockchain to", fn)
	// TODO verify mode perms
	fh, err := os.OpenFile(fn, os.O_CREATE|os.O_APPEND|os.O_WRONLY, os.ModePerm)
	if err != nil {
		return err
	}
	defer fh.Close()
	if err := chainmgr.ExportN(fh, first, last); err != nil {
		return err
	}
	glog.Infoln("Exported blockchain to", fn)
	return nil
}
Exemplo n.º 4
0
func ImportChain(chain *core.ChainManager, fn string) error {
	// Watch for Ctrl-C while the import is running.
	// If a signal is received, the import will stop at the next batch.
	interrupt := make(chan os.Signal, 1)
	stop := make(chan struct{})
	signal.Notify(interrupt, os.Interrupt)
	defer signal.Stop(interrupt)
	defer close(interrupt)
	go func() {
		if _, ok := <-interrupt; ok {
			glog.Info("caught interrupt during import, will stop at next batch")
		}
		close(stop)
	}()
	checkInterrupt := func() bool {
		select {
		case <-stop:
			return true
		default:
			return false
		}
	}

	glog.Infoln("Importing blockchain", fn)
	fh, err := os.Open(fn)
	if err != nil {
		return err
	}
	defer fh.Close()
	stream := rlp.NewStream(fh, 0)

	// Run actual the import.
	blocks := make(types.Blocks, importBatchSize)
	n := 0
	for batch := 0; ; batch++ {
		// Load a batch of RLP blocks.
		if checkInterrupt() {
			return fmt.Errorf("interrupted")
		}
		i := 0
		for ; i < importBatchSize; i++ {
			var b types.Block
			if err := stream.Decode(&b); err == io.EOF {
				break
			} else if err != nil {
				return fmt.Errorf("at block %d: %v", n, err)
			}
			// don't import first block
			if b.NumberU64() == 0 {
				i--
				continue
			}
			blocks[i] = &b
			n++
		}
		if i == 0 {
			break
		}
		// Import the batch.
		if checkInterrupt() {
			return fmt.Errorf("interrupted")
		}
		if hasAllBlocks(chain, blocks[:i]) {
			glog.Infof("skipping batch %d, all blocks present [%x / %x]",
				batch, blocks[0].Hash().Bytes()[:4], blocks[i-1].Hash().Bytes()[:4])
			continue
		}

		if _, err := chain.InsertChain(blocks[:i]); err != nil {
			return fmt.Errorf("invalid block %d: %v", n, err)
		}
	}
	return nil
}