func host_init() {
var e error
BtcRootDir := sys.BitcoinHome()
common.GocoinHomeDir = common.CFG.Datadir + string(os.PathSeparator)
common.Testnet = common.CFG.Testnet // So chaging this value would will only affect the behaviour after restart
if common.CFG.Testnet { // testnet3
common.GenesisBlock = btc.NewUint256FromString("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943")
common.Magic = [4]byte{0x0B, 0x11, 0x09, 0x07}
common.GocoinHomeDir += common.DataSubdir() + string(os.PathSeparator)
BtcRootDir += "testnet3" + string(os.PathSeparator)
network.AlertPubKey, _ = hex.DecodeString("04302390343f91cc401d56d68b123028bf52e5fca1939df127f63c6467cdf9c8e2c14b61104cf817d0b780da337893ecc4aaff1309e536162dabbdb45200ca2b0a")
common.MaxPeersNeeded = 100
} else {
common.GenesisBlock = btc.NewUint256FromString("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")
common.Magic = [4]byte{0xF9, 0xBE, 0xB4, 0xD9}
common.GocoinHomeDir += common.DataSubdir() + string(os.PathSeparator)
network.AlertPubKey, _ = hex.DecodeString("04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284")
common.MaxPeersNeeded = 1000
}
// Lock the folder
os.MkdirAll(common.GocoinHomeDir, 0770)
sys.LockDatabaseDir(common.GocoinHomeDir)
fi, e := os.Stat(common.GocoinHomeDir + "blockchain.dat")
if e != nil {
os.RemoveAll(common.GocoinHomeDir)
fmt.Println("You seem to be running Gocoin for the fist time on this PC")
fi, e = os.Stat(BtcRootDir + "blocks/blk00000.dat")
if e == nil && fi.Size() > 1024*1024 {
fmt.Println("There is a database from Satoshi client on your disk...")
if textui.AskYesNo("Do you want to import this database into Gocoin?") {
import_blockchain(BtcRootDir + "blocks")
}
}
}
// Create default wallet file if does not exist
println("wallet dir", common.CFG.Walletdir)
os.MkdirAll(common.CFG.Walletdir+string(os.PathSeparator)+"stealth", 0770)
default_wallet_fn := common.CFG.Walletdir + string(os.PathSeparator) + wallet.DefaultFileName
println("default_wallet_fn", default_wallet_fn)
fi, _ = os.Stat(default_wallet_fn)
if fi == nil || fi.IsDir() {
fmt.Println(default_wallet_fn, "not found")
old_wallet_location := common.GocoinHomeDir + "wallet.txt"
// If there is wallet.txt rename it to default.
fi, _ := os.Stat(old_wallet_location)
if fi != nil && !fi.IsDir() {
fmt.Println("Taking wallet.txt as", default_wallet_fn)
os.Rename(old_wallet_location, default_wallet_fn)
} else {
fmt.Println("Creating empty default wallet at", default_wallet_fn)
ioutil.WriteFile(default_wallet_fn, []byte(fmt.Sprintln("# Put your wallet's public addresses here")), 0660)
}
}
// cache the current balance of all the addresses from the current wallet files
wallet.LoadAllWallets()
fmt.Println("Loading UTXO database while checking balance of", len(wallet.MyWallet.Addrs),
"addresses... (press Ctrl-C to interrupt)")
__exit := make(chan bool)
__done := make(chan bool)
go func() {
for {
select {
case s := <-killchan:
fmt.Println(s)
chain.AbortNow = true
case <-__exit:
__done <- true
return
}
}
}()
ext := &chain.NewChanOpts{NotifyTxAdd: wallet.TxNotifyAdd,
NotifyTxDel: wallet.TxNotifyDel, LoadWalk: wallet.NewUTXO}
sta := time.Now().UnixNano()
common.BlockChain = chain.NewChainExt(common.GocoinHomeDir, common.GenesisBlock, common.FLAG.Rescan, ext)
sto := time.Now().UnixNano()
if chain.AbortNow {
fmt.Printf("Blockchain opening aborted after %.3f seconds\n", float64(sto-sta)/1e9)
common.BlockChain.Close()
sys.UnlockDatabaseDir()
os.Exit(1)
}
wallet.ChainInitDone()
al, sy := sys.MemUsed()
fmt.Printf("Blockchain open in %.3f seconds. %d + %d MB of RAM used (%d)\n",
float64(sto-sta)/1e9, al>>20, qdb.ExtraMemoryConsumed>>20, sy>>20)
common.StartTime = time.Now()
__exit <- true
_ = <-__done
// ... and now load the dafault wallet
wallet.LoadWallet(default_wallet_fn)
if wallet.MyWallet != nil {
wallet.UpdateBalance()
fmt.Print(wallet.DumpBalance(wallet.MyBalance, nil, false, true))
}
}
func import_blockchain(dir string) {
trust := !textui.AskYesNo("Do you want to verify scripts while importing (will be slow)?")
BlockDatabase := blockdb.NewBlockDB(dir, common.Magic)
chain := chain.NewChain(common.GocoinHomeDir, common.GenesisBlock, false)
var bl *btc.Block
var er error
var dat []byte
var totbytes, perbytes uint64
chain.DoNotSync = true
fmt.Println("Be patient while importing Satoshi's database... ")
start := time.Now().UnixNano()
prv := start
for {
now := time.Now().UnixNano()
if now-prv >= 10e9 {
stat(now-start, now-prv, totbytes, perbytes, chain.BlockTreeEnd.Height)
prv = now // show progress each 10 seconds
perbytes = 0
}
dat, er = BlockDatabase.FetchNextBlock()
if dat == nil || er != nil {
println("END of DB file")
break
}
bl, er = btc.NewBlock(dat[:])
if er != nil {
println("Block inconsistent:", er.Error())
break
}
bl.Trusted = trust
er, _, _ = chain.CheckBlock(bl)
if er != nil {
if er.Error() != "Genesis" {
println("CheckBlock failed:", er.Error())
//os.Exit(1) // Such a thing should not happen, so let's better abort here.
}
continue
}
er = chain.AcceptBlock(bl)
if er != nil {
println("AcceptBlock failed:", er.Error())
//os.Exit(1) // Such a thing should not happen, so let's better abort here.
}
totbytes += uint64(len(bl.Raw))
perbytes += uint64(len(bl.Raw))
}
stop := time.Now().UnixNano()
stat(stop-start, stop-prv, totbytes, perbytes, chain.BlockTreeEnd.Height)
fmt.Println("Satoshi's database import finished in", (stop-start)/1e9, "seconds")
fmt.Println("Now saving the new database...")
chain.Sync()
chain.Save()
chain.Close()
fmt.Println("Database saved. No more imports should be needed.")
fmt.Println("It is advised to close and restart the node now, to free some mem.")
}