예제 #1
0
// processBlock potentially imports the block into the database.  It first
// deserializes the raw block while checking for errors.  Already known blocks
// are skipped and orphan blocks are considered errors.  Returns whether the
// block was imported along with any potential errors.
//
// NOTE: This is not a safe import as it does not verify chain rules.
func (bi *blockImporter) processBlock(serializedBlock []byte) (bool, error) {
	// Deserialize the block which includes checks for malformed blocks.
	block, err := btcutil.NewBlockFromBytes(serializedBlock)
	if err != nil {
		return false, err
	}

	// update progress statistics
	bi.lastBlockTime = block.MsgBlock().Header.Timestamp
	bi.receivedLogTx += int64(len(block.MsgBlock().Transactions))

	// Skip blocks that already exist.
	var exists bool
	err = bi.db.View(func(tx database.Tx) error {
		exists, err = tx.HasBlock(block.Sha())
		if err != nil {
			return err
		}
		return nil
	})
	if err != nil {
		return false, err
	}
	if exists {
		return false, nil
	}

	// Don't bother trying to process orphans.
	prevHash := &block.MsgBlock().Header.PrevBlock
	if !prevHash.IsEqual(&zeroHash) {
		var exists bool
		err := bi.db.View(func(tx database.Tx) error {
			exists, err = tx.HasBlock(prevHash)
			if err != nil {
				return err
			}
			return nil
		})
		if err != nil {
			return false, err
		}
		if !exists {
			return false, fmt.Errorf("import file contains block "+
				"%v which does not link to the available "+
				"block chain", prevHash)
		}
	}

	// Put the blocks into the database with no checking of chain rules.
	err = bi.db.Update(func(tx database.Tx) error {
		return tx.StoreBlock(block)
	})
	if err != nil {
		return false, err
	}

	return true, nil
}
예제 #2
0
파일: leveldb.go 프로젝트: chrjen/btcd
// DropAfterBlockBySha will remove any blocks from the database after
// the given block.
func (db *LevelDb) DropAfterBlockBySha(sha *wire.ShaHash) (rerr error) {
	db.dbLock.Lock()
	defer db.dbLock.Unlock()
	defer func() {
		if rerr == nil {
			rerr = db.processBatches()
		} else {
			db.lBatch().Reset()
		}
	}()

	startheight := db.nextBlock - 1

	keepidx, err := db.getBlkLoc(sha)
	if err != nil {
		// should the error here be normalized ?
		log.Tracef("block loc failed %v ", sha)
		return err
	}

	for height := startheight; height > keepidx; height = height - 1 {
		var blk *btcutil.Block
		blksha, buf, err := db.getBlkByHeight(height)
		if err != nil {
			return err
		}
		blk, err = btcutil.NewBlockFromBytes(buf)
		if err != nil {
			return err
		}

		for _, tx := range blk.MsgBlock().Transactions {
			err = db.unSpend(tx)
			if err != nil {
				return err
			}
		}
		// rather than iterate the list of tx backward, do it twice.
		for _, tx := range blk.Transactions() {
			var txUo txUpdateObj
			txUo.delete = true
			db.txUpdateMap[*tx.Sha()] = &txUo
		}
		db.lBatch().Delete(shaBlkToKey(blksha))
		db.lBatch().Delete(int64ToKey(int64(height)))
	}

	// update the last block cache
	db.lastBlkShaCached = true
	db.lastBlkSha = *sha
	db.lastBlkIdx = keepidx
	db.nextBlock = keepidx + 1

	return nil
}
예제 #3
0
// loadBlocks reads files containing bitcoin block data (gzipped but otherwise
// in the format bitcoind writes) from disk and returns them as an array of
// btcutil.Block.  This is largely borrowed from the test code in btcdb.
func loadBlocks(filename string) (blocks []*btcutil.Block, err error) {
	filename = filepath.Join("testdata/", filename)

	var network = wire.MainNet
	var dr io.Reader
	var fi io.ReadCloser

	fi, err = os.Open(filename)
	if err != nil {
		return
	}

	if strings.HasSuffix(filename, ".bz2") {
		dr = bzip2.NewReader(fi)
	} else {
		dr = fi
	}
	defer fi.Close()

	var block *btcutil.Block

	err = nil
	for height := int64(1); err == nil; height++ {
		var rintbuf uint32
		err = binary.Read(dr, binary.LittleEndian, &rintbuf)
		if err == io.EOF {
			// hit end of file at expected offset: no warning
			height--
			err = nil
			break
		}
		if err != nil {
			break
		}
		if rintbuf != uint32(network) {
			break
		}
		err = binary.Read(dr, binary.LittleEndian, &rintbuf)
		blocklen := rintbuf

		rbytes := make([]byte, blocklen)

		// read block
		dr.Read(rbytes)

		block, err = btcutil.NewBlockFromBytes(rbytes)
		if err != nil {
			return
		}
		blocks = append(blocks, block)
	}

	return
}
예제 #4
0
파일: import.go 프로젝트: chrjen/btcd
// processBlock potentially imports the block into the database.  It first
// deserializes the raw block while checking for errors.  Already known blocks
// are skipped and orphan blocks are considered errors.  Finally, it runs the
// block through the chain rules to ensure it follows all rules and matches
// up to the known checkpoint.  Returns whether the block was imported along
// with any potential errors.
func (bi *blockImporter) processBlock(serializedBlock []byte) (bool, error) {
	// Deserialize the block which includes checks for malformed blocks.
	block, err := btcutil.NewBlockFromBytes(serializedBlock)
	if err != nil {
		return false, err
	}

	// update progress statistics
	bi.lastBlockTime = block.MsgBlock().Header.Timestamp
	bi.receivedLogTx += int64(len(block.MsgBlock().Transactions))

	// Skip blocks that already exist.
	blockSha := block.Sha()
	exists, err := bi.db.ExistsSha(blockSha)
	if err != nil {
		return false, err
	}
	if exists {
		return false, nil
	}

	// Don't bother trying to process orphans.
	prevHash := &block.MsgBlock().Header.PrevBlock
	if !prevHash.IsEqual(&zeroHash) {
		exists, err := bi.db.ExistsSha(prevHash)
		if err != nil {
			return false, err
		}
		if !exists {
			return false, fmt.Errorf("import file contains block "+
				"%v which does not link to the available "+
				"block chain", prevHash)
		}
	}

	// Ensure the blocks follows all of the chain rules and match up to the
	// known checkpoints.
	isOrphan, err := bi.chain.ProcessBlock(block, bi.medianTime,
		blockchain.BFFastAdd)
	if err != nil {
		return false, err
	}
	if isOrphan {
		return false, fmt.Errorf("import file contains an orphan "+
			"block: %v", blockSha)
	}

	return true, nil
}
예제 #5
0
파일: block.go 프로젝트: chrjen/btcd
// fetchBlockBySha - return a btcutil Block
// Must be called with db lock held.
func (db *LevelDb) fetchBlockBySha(sha *wire.ShaHash) (blk *btcutil.Block, err error) {

	buf, height, err := db.fetchSha(sha)
	if err != nil {
		return
	}

	blk, err = btcutil.NewBlockFromBytes(buf)
	if err != nil {
		return
	}
	blk.SetHeight(height)

	return
}
예제 #6
0
파일: common_test.go 프로젝트: chrjen/btcd
// loadBlocks loads the blocks contained in the testdata directory and returns
// a slice of them.
func loadBlocks(t *testing.T) ([]*btcutil.Block, error) {
	if len(savedBlocks) != 0 {
		return savedBlocks, nil
	}

	var dr io.Reader
	fi, err := os.Open(blockDataFile)
	if err != nil {
		t.Errorf("failed to open file %v, err %v", blockDataFile, err)
		return nil, err
	}
	if strings.HasSuffix(blockDataFile, ".bz2") {
		z := bzip2.NewReader(fi)
		dr = z
	} else {
		dr = fi
	}

	defer func() {
		if err := fi.Close(); err != nil {
			t.Errorf("failed to close file %v %v", blockDataFile, err)
		}
	}()

	// Set the first block as the genesis block.
	blocks := make([]*btcutil.Block, 0, 256)
	genesis := btcutil.NewBlock(chaincfg.MainNetParams.GenesisBlock)
	blocks = append(blocks, genesis)

	for height := int64(1); err == nil; height++ {
		var rintbuf uint32
		err := binary.Read(dr, binary.LittleEndian, &rintbuf)
		if err == io.EOF {
			// hit end of file at expected offset: no warning
			height--
			err = nil
			break
		}
		if err != nil {
			t.Errorf("failed to load network type, err %v", err)
			break
		}
		if rintbuf != uint32(network) {
			t.Errorf("Block doesn't match network: %v expects %v",
				rintbuf, network)
			break
		}
		err = binary.Read(dr, binary.LittleEndian, &rintbuf)
		blocklen := rintbuf

		rbytes := make([]byte, blocklen)

		// read block
		dr.Read(rbytes)

		block, err := btcutil.NewBlockFromBytes(rbytes)
		if err != nil {
			t.Errorf("failed to parse block %v", height)
			return nil, err
		}
		blocks = append(blocks, block)
	}

	savedBlocks = blocks
	return blocks, nil
}
예제 #7
0
// loadBlocks loads the blocks contained in the testdata directory and returns
// a slice of them.
func loadBlocks(t *testing.T, dataFile string, network wire.BitcoinNet) ([]*btcutil.Block, error) {
	// Open the file that contains the blocks for reading.
	fi, err := os.Open(dataFile)
	if err != nil {
		t.Errorf("failed to open file %v, err %v", dataFile, err)
		return nil, err
	}
	defer func() {
		if err := fi.Close(); err != nil {
			t.Errorf("failed to close file %v %v", dataFile,
				err)
		}
	}()
	dr := bzip2.NewReader(fi)

	// Set the first block as the genesis block.
	blocks := make([]*btcutil.Block, 0, 256)
	genesis := btcutil.NewBlock(chaincfg.MainNetParams.GenesisBlock)
	blocks = append(blocks, genesis)

	// Load the remaining blocks.
	for height := 1; ; height++ {
		var net uint32
		err := binary.Read(dr, binary.LittleEndian, &net)
		if err == io.EOF {
			// Hit end of file at the expected offset.  No error.
			break
		}
		if err != nil {
			t.Errorf("Failed to load network type for block %d: %v",
				height, err)
			return nil, err
		}
		if net != uint32(network) {
			t.Errorf("Block doesn't match network: %v expects %v",
				net, network)
			return nil, err
		}

		var blockLen uint32
		err = binary.Read(dr, binary.LittleEndian, &blockLen)
		if err != nil {
			t.Errorf("Failed to load block size for block %d: %v",
				height, err)
			return nil, err
		}

		// Read the block.
		blockBytes := make([]byte, blockLen)
		_, err = io.ReadFull(dr, blockBytes)
		if err != nil {
			t.Errorf("Failed to load block %d: %v", height, err)
			return nil, err
		}

		// Deserialize and store the block.
		block, err := btcutil.NewBlockFromBytes(blockBytes)
		if err != nil {
			t.Errorf("Failed to parse block %v: %v", height, err)
			return nil, err
		}
		blocks = append(blocks, block)
	}

	return blocks, nil
}