Chain importer

cmd/ethereum/flags.go

@@ -58,6 +58,7 @@ var (
 	DumpHash        string
 	DumpNumber      int
 	VmType          int
+	ImportChain     string
 )
 
 // flags specific to cli client
@@ -104,6 +105,7 @@ func Init() {
 	flag.BoolVar(&DiffTool, "difftool", false, "creates output for diff'ing. Sets LogLevel=0")
 	flag.StringVar(&DiffType, "diff", "all", "sets the level of diff output [vm, all]. Has no effect if difftool=false")
 	flag.BoolVar(&ShowGenesis, "genesis", false, "Dump the genesis block")
+	flag.StringVar(&ImportChain, "chain", "", "Imports fiven chain")
 
 	flag.BoolVar(&Dump, "dump", false, "output the ethereum state in JSON format. Sub args [number, hash]")
 	flag.StringVar(&DumpHash, "hash", "", "specify arg in hex")

cmd/ethereum/main.go

@@ -18,6 +18,7 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"os"
 	"runtime"
@@ -26,6 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/rlp"
 )
 
 const (
@@ -38,6 +40,10 @@ var clilogger = logger.NewLogger("CLI")
 func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
 
+	defer func() {
+		logger.Flush()
+	}()
+
 	utils.HandleInterrupt()
 
 	// precedence: code-internal flag default < config file < environment variables < command line
@@ -112,6 +118,27 @@ func main() {
 		utils.StartMining(ethereum)
 	}
 
+	if len(ImportChain) > 0 {
+		clilogger.Infof("importing chain '%s'\n", ImportChain)
+		c, err := ethutil.ReadAllFile(ImportChain)
+		if err != nil {
+			clilogger.Infoln(err)
+			return
+		}
+		var chain types.Blocks
+		if err := rlp.Decode(bytes.NewReader([]byte(c)), &chain); err != nil {
+			clilogger.Infoln(err)
+			return
+		}
+
+		ethereum.ChainManager().Reset()
+		if err := ethereum.ChainManager().InsertChain(chain); err != nil {
+			clilogger.Infoln(err)
+			return
+		}
+		clilogger.Infof("imported %d blocks\n", len(chain))
+	}
+
 	// better reworked as cases
 	if StartJsConsole {
 		InitJsConsole(ethereum)
@@ -131,5 +158,4 @@ func main() {
 
 	// this blocks the thread
 	ethereum.WaitForShutdown()
-	logger.Flush()
 }