/
import.go
101 lines (89 loc) · 2.89 KB
/
import.go
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/*
* Copyright (C) 2018 The ZeepinChain Authors
* This file is part of The ZeepinChain library.
*
* The ZeepinChain is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ZeepinChain is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The ZeepinChain. If not, see <http://www.gnu.org/licenses/>.
*/
package utils
import (
"bufio"
"bytes"
"fmt"
"io"
"os"
"github.com/zeepin/ZeepinChain/common/log"
"github.com/zeepin/ZeepinChain/common/serialization"
"github.com/zeepin/ZeepinChain/core/ledger"
"github.com/zeepin/ZeepinChain/core/types"
)
func ImportBlocks(importFile string, targetHeight uint32) error {
currBlockHeight := ledger.DefLedger.GetCurrentBlockHeight()
if targetHeight > 0 && currBlockHeight >= targetHeight {
log.Infof("No blocks to import.")
return nil
}
ifile, err := os.OpenFile(importFile, os.O_RDONLY, 0644)
if err != nil {
return err
}
defer ifile.Close()
fReader := bufio.NewReader(ifile)
metadata := NewExportBlockMetadata()
err = metadata.Deserialize(fReader)
if err != nil {
return fmt.Errorf("Metadata deserialize error:%s", err)
}
endBlockHeight := metadata.BlockHeight
if endBlockHeight <= currBlockHeight {
log.Infof("No blocks to import.\n")
return nil
}
if targetHeight == 0 {
targetHeight = endBlockHeight
}
if targetHeight < endBlockHeight {
endBlockHeight = targetHeight
}
log.Infof("Start import blocks")
log.Infof("Current block height:%d TotalBlocks:%d", currBlockHeight, endBlockHeight-currBlockHeight)
for i := uint32(0); i <= endBlockHeight; i++ {
size, err := serialization.ReadUint32(fReader)
if err != nil {
return fmt.Errorf("Read block height:%d error:%s", i, err)
}
compressData := make([]byte, size)
_, err = io.ReadFull(fReader, compressData)
if err != nil {
return fmt.Errorf("Read block data height:%d error:%s", i, err)
}
if i <= currBlockHeight {
continue
}
blockData, err := DecompressBlockData(compressData, metadata.CompressType)
if err != nil {
return fmt.Errorf("block height:%d decompress error:%s", i, err)
}
block := &types.Block{}
err = block.Deserialize(bytes.NewReader(blockData))
if err != nil {
return fmt.Errorf("block height:%d deserialize error:%s", i, err)
}
err = ledger.DefLedger.AddBlock(block)
if err != nil {
return fmt.Errorf("add block height:%d error:%s", i, err)
}
}
log.Infof("Import block complete, current block height:%d", ledger.DefLedger.GetCurrentBlockHeight())
return nil
}