func raw_tx(w http.ResponseWriter, r *http.Request) {
	if !ipchecker(r) {
		return
	}

	defer func() {
		if r := recover(); r != nil {
			fmt.Fprintln(w, "Error")
			if err, ok := r.(error); ok {
				fmt.Fprintln(w, err.Error())
			}
		}
	}()

	if len(r.Form["id"]) == 0 {
		fmt.Println("No id given")
		return
	}

	txid := btc.NewUint256FromString(r.Form["id"][0])
	fmt.Fprintln(w, "TxID:", txid.String())
	if tx, ok := network.TransactionsToSend[txid.BIdx()]; ok {
		s, _, _, _, _ := usif.DecodeTx(tx.Tx)
		w.Write([]byte(s))
	} else {
		fmt.Fprintln(w, "Not found")
	}
}

func output_utxo_tx_xml(w http.ResponseWriter, minedid, minedat string) {
	txid := btc.NewUint256FromString(minedid)
	if txid == nil {
		return
	}

	block_number, er := strconv.ParseUint(minedat, 10, 32)
	if er != nil {
		return
	}

	lck := new(usif.OneLock)
	lck.In.Add(1)
	lck.Out.Add(1)
	usif.LocksChan <- lck
	lck.In.Wait()

	w.Write([]byte("<tx>"))
	fmt.Fprint(w, "<id>", minedid, "</id>")
	if dat, er := common.BlockChain.GetRawTx(uint32(block_number), txid); er == nil {
		w.Write([]byte("<status>OK</status>"))
		w.Write([]byte(fmt.Sprint("<size>", len(dat), "</size>")))
		tx, _ := btc.NewTx(dat)
		output_tx_xml(w, tx)
	} else {
		w.Write([]byte("<status>Not found</status>"))
	}
	w.Write([]byte("</tx>"))

	lck.Out.Done()

}

func parserec(vv []interface{}) (ret *testvector) {
	ret = new(testvector)
	for i, u := range vv[0].([]interface{}) {
		switch uu := u.(type) {
		case []interface{}:
			txid := btc.NewUint256FromString(uu[0].(string))
			newrec := oneinp{txid: txid, vout: int(uu[1].(float64)), pkscr: uu[2].(string)}
			if len(uu) > 3 {
				newrec.value = uint64(uu[3].(float64))
			}
			ret.inps = append(ret.inps, newrec)
		default:
			fmt.Printf(" - %d is of a type %T\n", i, uu)
		}
	}
	ret.tx = vv[1].(string)
	params := vv[2].(string)
	var e error
	ret.ver_flags, e = decode_flags(params) // deifned in script_test.go
	if e != nil {
		println("skip", params)
		ret.skip = e.Error()
	}
	return
}

func output_tx_xml(w http.ResponseWriter, id string) {
	txid := btc.NewUint256FromString(id)
	w.Write([]byte("<tx>"))
	fmt.Fprint(w, "<id>", id, "</id>")
	if t2s, ok := network.TransactionsToSend[txid.BIdx()]; ok {
		w.Write([]byte("<status>OK</status>"))
		w.Write([]byte(fmt.Sprint("<len>", len(t2s.Data), "</len>")))
		tx := t2s.Tx
		w.Write([]byte("<inputs>"))
		for i := range tx.TxIn {
			w.Write([]byte("<input>"))
			var po *btc.TxOut
			inpid := btc.NewUint256(tx.TxIn[i].Input.Hash[:])
			if txinmem, ok := network.TransactionsToSend[inpid.BIdx()]; ok {
				if int(tx.TxIn[i].Input.Vout) < len(txinmem.TxOut) {
					po = txinmem.TxOut[tx.TxIn[i].Input.Vout]
				}
			} else {
				po, _ = common.BlockChain.Unspent.UnspentGet(&tx.TxIn[i].Input)
			}
			if po != nil {
				ok := script.VerifyTxScript(tx.TxIn[i].ScriptSig, po.Pk_script, i, tx, script.VER_P2SH|script.VER_DERSIG)
				if !ok {
					w.Write([]byte("<status>Script FAILED</status>"))
				} else {
					w.Write([]byte("<status>OK</status>"))
				}
				fmt.Fprint(w, "<value>", po.Value, "</value>")
				ads := "???"
				if ad := btc.NewAddrFromPkScript(po.Pk_script, common.Testnet); ad != nil {
					ads = ad.String()
				}
				fmt.Fprint(w, "<addr>", ads, "</addr>")
				fmt.Fprint(w, "<block>", po.BlockHeight, "</block>")
			} else {
				w.Write([]byte("<status>UNKNOWN INPUT</status>"))
			}
			w.Write([]byte("</input>"))
		}
		w.Write([]byte("</inputs>"))

		w.Write([]byte("<outputs>"))
		for i := range tx.TxOut {
			w.Write([]byte("<output>"))
			fmt.Fprint(w, "<value>", tx.TxOut[i].Value, "</value>")
			adr := btc.NewAddrFromPkScript(tx.TxOut[i].Pk_script, common.Testnet)
			if adr != nil {
				fmt.Fprint(w, "<addr>", adr.String(), "</addr>")
			} else {
				fmt.Fprint(w, "<addr>", "scr:"+hex.EncodeToString(tx.TxOut[i].Pk_script), "</addr>")
			}
			w.Write([]byte("</output>"))
		}
		w.Write([]byte("</outputs>"))
	} else {
		w.Write([]byte("<status>Not found</status>"))
	}
	w.Write([]byte("</tx>"))
}

func dec_tx(par string) {
	txid := btc.NewUint256FromString(par)
	if txid == nil {
		fmt.Println("You must specify a valid transaction ID for this command.")
		list_txs("")
		return
	}
	if tx, ok := network.TransactionsToSend[txid.BIdx()]; ok {
		s, _, _, _, _ := usif.DecodeTx(tx.Tx)
		fmt.Println(s)
	} else {
		fmt.Println("No such transaction ID in the memory pool.")
	}
}

func save_tx(par string) {
	txid := btc.NewUint256FromString(par)
	if txid == nil {
		fmt.Println("You must specify a valid transaction ID for this command.")
		list_txs("")
		return
	}
	if tx, ok := network.TransactionsToSend[txid.BIdx()]; ok {
		fn := tx.Hash.String() + ".tx"
		ioutil.WriteFile(fn, tx.Data, 0600)
		fmt.Println("Saved to", fn)
	} else {
		fmt.Println("No such transaction ID in the memory pool.")
	}
}

func main() {
	fmt.Println("Gocoin FetchTx version", gocoin.Version)

	if len(os.Args) < 2 {
		fmt.Println("Specify transaction id on the command line (MSB).")
		return
	}

	txid := btc.NewUint256FromString(os.Args[1])
	rawtx := utils.GetTxFromWeb(txid)
	if rawtx == nil {
		fmt.Println("Error fetching the transaction")
	} else {
		ioutil.WriteFile(txid.String()+".tx", rawtx, 0666)
	}
}

func parserec(vv []interface{}) (ret *testvector) {
	ret = new(testvector)
	for i, u := range vv[0].([]interface{}) {
		switch uu := u.(type) {
		case []interface{}:
			txid := btc.NewUint256FromString(uu[0].(string))
			ret.inps = append(ret.inps, oneinp{txid: txid,
				vout: int(uu[1].(float64)), pkscr: uu[2].(string)})
		default:
			fmt.Printf(" - %d is of a type %T\n", i, uu)
		}
	}
	ret.tx = vv[1].(string)
	ret.p2sh = vv[2].(bool)
	return
}

func del_tx(par string) {
	txid := btc.NewUint256FromString(par)
	if txid == nil {
		fmt.Println("You must specify a valid transaction ID for this command.")
		list_txs("")
		return
	}
	network.TxMutex.Lock()
	if _, ok := network.TransactionsToSend[txid.BIdx()]; !ok {
		network.TxMutex.Unlock()
		fmt.Println("No such transaction ID in the memory pool.")
		list_txs("")
		return
	}
	delete(network.TransactionsToSend, txid.BIdx())
	network.TxMutex.Unlock()
	fmt.Println("Transaction", txid.String(), "removed from the memory pool")
}

func send_inv(par string) {
	cs := strings.Split(par, " ")
	if len(cs) != 2 {
		println("Specify hash and type")
		return
	}
	ha := btc.NewUint256FromString(cs[1])
	if ha == nil {
		println("Incorrect hash")
		return
	}
	v, e := strconv.ParseInt(cs[0], 10, 32)
	if e != nil {
		println("Incorrect type:", e.Error())
		return
	}
	network.NetRouteInv(uint32(v), ha, nil)
	fmt.Println("Inv sent to all peers")
}

func NewUnspRec(l []byte) (uns *unspRec) {
	if l[64] != '-' {
		return nil
	}

	txid := btc.NewUint256FromString(string(l[:64]))
	if txid == nil {
		return nil
	}

	rst := strings.SplitN(string(l[65:]), " ", 2)
	vout, e := strconv.ParseUint(rst[0], 10, 32)
	if e != nil {
		return nil
	}

	uns = new(unspRec)
	uns.TxPrevOut.Hash = txid.Hash
	uns.TxPrevOut.Vout = uint32(vout)
	if len(rst) > 1 {
		uns.label = rst[1]
	}

	if first_determ_idx < len(keys) {
		str := string(l)
		if sti := strings.Index(str, "_StealthC:"); sti != -1 {
			c, e := hex.DecodeString(str[sti+10 : sti+10+64])
			if e != nil {
				fmt.Println("ERROR at stealth", txid.String(), vout, e.Error())
			} else {
				// add a new key to the wallet
				sec := btc.DeriveNextPrivate(keys[first_determ_idx].Key, c)
				rec := btc.NewPrivateAddr(sec, ver_secret(), true) // stealth keys are always compressed
				rec.BtcAddr.Extra.Label = uns.label
				keys = append(keys, rec)
				uns.stealth = true
				uns.key = rec
			}
		}
	}

	return
}

func send1_tx(par string) {
	txid := btc.NewUint256FromString(par)
	if txid == nil {
		fmt.Println("You must specify a valid transaction ID for this command.")
		list_txs("")
		return
	}
	network.TxMutex.Lock()
	if ptx, ok := network.TransactionsToSend[txid.BIdx()]; ok {
		network.TxMutex.Unlock()
		usif.SendInvToRandomPeer(1, txid)
		ptx.Invsentcnt++
		fmt.Println("INV for TxID", txid.String(), "sent to a random node")
		fmt.Println("If it does not appear in the chain, you may want to redo it.")
	} else {
		network.TxMutex.Unlock()
		fmt.Println("No such transaction ID in the memory pool.")
		list_txs("")
	}
}

func dump_block(s string) {
	h := btc.NewUint256FromString(s)
	if h == nil {
		println("Specify block's hash")
		return
	}
	bl, _, e := common.BlockChain.Blocks.BlockGet(h)
	if e != nil {
		println(e.Error())
		return
	}
	fn := h.String() + ".bin"
	f, e := os.Create(fn)
	if e != nil {
		println(e.Error())
		return
	}
	f.Write(bl)
	f.Close()
	fmt.Println("Block saved to file:", fn)
}

func dump_block(s string) {
	h := btc.NewUint256FromString(s)
	if h == nil {
		println("Specify block's hash")
		return
	}
	crec, _, er := common.BlockChain.Blocks.BlockGetExt(btc.NewUint256(h.Hash[:]))
	if er != nil {
		println(er.Error())
		return
	}

	ioutil.WriteFile(h.String()+".bin", crec.Data, 0700)
	if crec.Block == nil {
		crec.Block, _ = btc.NewBlock(crec.Data)
	}
	if crec.Block.OldData == nil {
		crec.Block.BuildTxList()
	}
	ioutil.WriteFile(h.String()+".old", crec.Block.OldData, 0700)

	fmt.Println("Block saved")
}

func TestSighash(t *testing.T) {
	var arr [][]interface{}

	dat, er := ioutil.ReadFile("../test/sighash.json")
	if er != nil {
		println(er.Error())
		return
	}

	r := bytes.NewBuffer(dat)
	d := json.NewDecoder(r)
	d.UseNumber()

	er = d.Decode(&arr)
	if er != nil {
		println(er.Error())
		return
	}
	for i := range arr {
		if len(arr[i]) == 5 {
			tmp, _ := hex.DecodeString(arr[i][0].(string))
			tx, _ := btc.NewTx(tmp)
			if tx == nil {
				t.Error("Cannot decode tx from text number", i)
				continue
			}
			tmp, _ = hex.DecodeString(arr[i][1].(string)) // script
			iidx, _ := arr[i][2].(json.Number).Int64()
			htype, _ := arr[i][3].(json.Number).Int64()
			got := tx.SignatureHash(tmp, int(iidx), int32(htype))
			exp := btc.NewUint256FromString(arr[i][4].(string))
			if !bytes.Equal(exp.Hash[:], got) {
				t.Error("SignatureHash mismatch at index", i)
			}
		}
	}
}

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)
		common.MaxPeersNeeded = 2000
	} else {
		common.GenesisBlock = btc.NewUint256FromString("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")
		common.Magic = [4]byte{0xF9, 0xBE, 0xB4, 0xD9}
		common.GocoinHomeDir += common.DataSubdir() + string(os.PathSeparator)
		common.MaxPeersNeeded = 5000
	}

	// 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")
			}
		}
	}

	fmt.Println("Loading UTXO-db and P2SH/P2KH outputs of", btc.UintToBtc(common.AllBalMinVal), "BTC or more")

	__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,
		UTXOVolatileMode:     common.FLAG.VolatileUTXO,
		UndoBlocks:           common.FLAG.UndoBlocks,
		SetBlocksDBCacheSize: true, BlocksDBCacheSize: int(common.CFG.Memory.MaxCachedBlocks)}

	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)
	}
	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

}

func dl_payment(w http.ResponseWriter, r *http.Request) {
	if !ipchecker(r) {
		return
	}

	var err string

	if len(r.Form["outcnt"]) == 1 {
		var thisbal chain.AllUnspentTx
		var pay_cmd string
		var totalinput, spentsofar uint64
		var change_addr *btc.BtcAddr
		var multisig_input []*wallet.MultisigAddr

		addrs_to_msign := make(map[string]bool)

		tx := new(btc.Tx)
		tx.Version = 1
		tx.Lock_time = 0

		outcnt, _ := strconv.ParseUint(r.Form["outcnt"][0], 10, 32)

		wallet.BalanceMutex.Lock()
		for i := 1; i <= int(outcnt); i++ {
			is := fmt.Sprint(i)
			if len(r.Form["txout"+is]) == 1 && r.Form["txout"+is][0] == "on" {
				hash := btc.NewUint256FromString(r.Form["txid"+is][0])
				if hash != nil {
					vout, er := strconv.ParseUint(r.Form["txvout"+is][0], 10, 32)
					if er == nil {
						var po = btc.TxPrevOut{Hash: hash.Hash, Vout: uint32(vout)}
						for j := range wallet.MyBalance {
							if wallet.MyBalance[j].TxPrevOut == po {
								thisbal = append(thisbal, wallet.MyBalance[j])

								// Add the input to our tx
								tin := new(btc.TxIn)
								tin.Input = wallet.MyBalance[j].TxPrevOut
								tin.Sequence = 0xffffffff
								tx.TxIn = append(tx.TxIn, tin)

								// Add new multisig address description
								_, msi := wallet.IsMultisig(wallet.MyBalance[j].BtcAddr)
								multisig_input = append(multisig_input, msi)
								if msi != nil {
									for ai := range msi.ListOfAddres {
										addrs_to_msign[msi.ListOfAddres[ai]] = true
									}
								}

								// Add the value to total input value
								totalinput += wallet.MyBalance[j].Value

								// If no change specified, use the first input addr as it
								if change_addr == nil {
									change_addr = wallet.MyBalance[j].BtcAddr
								}
							}
						}
					}
				}
			}
		}
		wallet.BalanceMutex.Unlock()

		for i := 1; ; i++ {
			adridx := fmt.Sprint("adr", i)
			btcidx := fmt.Sprint("btc", i)

			if len(r.Form[adridx]) != 1 || len(r.Form[btcidx]) != 1 {
				break
			}

			if len(r.Form[adridx][0]) > 1 {
				addr, er := btc.NewAddrFromString(r.Form[adridx][0])
				if er == nil {
					am, er := btc.StringToSatoshis(r.Form[btcidx][0])
					if er == nil && am > 0 {
						if pay_cmd == "" {
							pay_cmd = "wallet -useallinputs -send "
						} else {
							pay_cmd += ","
						}
						pay_cmd += addr.Enc58str + "=" + btc.UintToBtc(am)

						outs, er := btc.NewSpendOutputs(addr, am, common.CFG.Testnet)
						if er != nil {
							err = er.Error()
							goto error
						}
						tx.TxOut = append(tx.TxOut, outs...)

						spentsofar += am
					} else {
						err = "Incorrect amount (" + r.Form[btcidx][0] + ") for Output #" + fmt.Sprint(i)
						goto error
					}
				} else {
					err = "Incorrect address (" + r.Form[adridx][0] + ") for Output #" + fmt.Sprint(i)
					goto error
//.........这里部分代码省略.........

// load the content of the "balance/" folder
func load_balance(showbalance bool) {
	var unknownInputs, multisigInputs int
	f, e := os.Open("balance/unspent.txt")
	if e != nil {
		println(e.Error())
		return
	}
	rd := bufio.NewReader(f)
	for {
		l, _, e := rd.ReadLine()
		if len(l) == 0 && e != nil {
			break
		}
		if l[64] == '-' {
			txid := btc.NewUint256FromString(string(l[:64]))
			rst := strings.SplitN(string(l[65:]), " ", 2)
			vout, _ := strconv.ParseUint(rst[0], 10, 32)
			uns := new(btc.TxPrevOut)
			copy(uns.Hash[:], txid.Hash[:])
			uns.Vout = uint32(vout)
			lab := ""
			if len(rst) > 1 {
				lab = rst[1]
			}

			str := string(l)
			if sti := strings.Index(str, "_StealthC:"); sti != -1 {
				c, e := hex.DecodeString(str[sti+10 : sti+10+64])
				if e != nil {
					fmt.Println("ERROR at stealth", txid.String(), vout, e.Error())
				} else {
					// add a new key to the wallet
					sec := btc.DeriveNextPrivate(first_seed[:], c)
					is_stealth[len(priv_keys)] = true
					priv_keys = append(priv_keys, sec)
					labels = append(labels, lab)
					pub_key := btc.PublicFromPrivate(sec, true)
					publ_addrs = append(publ_addrs, btc.NewAddrFromPubkey(pub_key, AddrVerPubkey()))
					compressed_key = append(compressed_key, true) // stealth keys are always compressed
				}
			}

			if _, ok := loadedTxs[txid.Hash]; !ok {
				tf, _ := os.Open("balance/" + txid.String() + ".tx")
				if tf != nil {
					siz, _ := tf.Seek(0, os.SEEK_END)
					tf.Seek(0, os.SEEK_SET)
					buf := make([]byte, siz)
					tf.Read(buf)
					tf.Close()
					th := btc.Sha2Sum(buf)
					if bytes.Equal(th[:], txid.Hash[:]) {
						tx, _ := btc.NewTx(buf)
						if tx != nil {
							loadedTxs[txid.Hash] = tx
						} else {
							println("transaction is corrupt:", txid.String())
						}
					} else {
						println("transaction file is corrupt:", txid.String())
						os.Exit(1)
					}
				} else {
					println("transaction file not found:", txid.String())
					os.Exit(1)
				}
			}

			// Sum up all the balance and check if we have private key for this input
			uo := UO(uns)

			add_it := true

			if !btc.IsP2SH(uo.Pk_script) {
				fnd := false
				for j := range publ_addrs {
					if publ_addrs[j].Owns(uo.Pk_script) {
						fnd = true
						break
					}
				}

				if !fnd {
					if *onlvalid {
						add_it = false
					}
					if showbalance {
						unknownInputs++
						if *verbose {
							ss := uns.String()
							ss = ss[:8] + "..." + ss[len(ss)-12:]
							fmt.Println(ss, "does not belong to your wallet (cannot sign it)")
						}
					}
				}
			} else {
				if *onlvalid {
					add_it = false
				}
//.........这里部分代码省略.........

func host_init() {
	var e error
	BtcRootDir := sys.BitcoinHome()

	if common.CFG.Datadir == "" {
		common.GocoinHomeDir = BtcRootDir + "gocoin" + string(os.PathSeparator)
	} else {
		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 += "tstnet" + 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 += "btcnet" + string(os.PathSeparator)
		network.AlertPubKey, _ = hex.DecodeString("04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284")
		common.MaxPeersNeeded = 1000
	}

	// Lock the folder
	os.MkdirAll(common.GocoinHomeDir, 0770)
	os.MkdirAll(common.GocoinHomeDir+"wallet", 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")
			}
		}
	}

	// 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{NotifyTx: wallet.TxNotify,
		NotifyStealthTx: wallet.StealthNotify,
		LoadWalk:        wallet.NewUTXO, LoadFlush: wallet.DoPendingStealths}

	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
}

func xml_txs2s(w http.ResponseWriter, r *http.Request) {
	if !ipchecker(r) {
		return
	}

	if checksid(r) {
		if len(r.Form["del"]) > 0 {
			tid := btc.NewUint256FromString(r.Form["del"][0])
			if tid != nil {
				network.TxMutex.Lock()
				delete(network.TransactionsToSend, tid.BIdx())
				network.TxMutex.Unlock()
			}
		}

		if len(r.Form["send"]) > 0 {
			tid := btc.NewUint256FromString(r.Form["send"][0])
			if tid != nil {
				network.TxMutex.Lock()
				if ptx, ok := network.TransactionsToSend[tid.BIdx()]; ok {
					network.TxMutex.Unlock()
					cnt := network.NetRouteInv(1, tid, nil)
					if cnt == 0 {
						usif.SendInvToRandomPeer(1, tid)
					} else {
						ptx.Invsentcnt += cnt
					}
				} else {
					network.TxMutex.Unlock()
				}
			}
		}

		if len(r.Form["sendone"]) > 0 {
			tid := btc.NewUint256FromString(r.Form["sendone"][0])
			if tid != nil {
				network.TxMutex.Lock()
				if ptx, ok := network.TransactionsToSend[tid.BIdx()]; ok {
					network.TxMutex.Unlock()
					usif.SendInvToRandomPeer(1, tid)
					ptx.Invsentcnt++
				} else {
					network.TxMutex.Unlock()
				}
			}
		}

	}

	w.Header()["Content-Type"] = []string{"text/xml"}

	if len(r.Form["id"]) > 0 {
		output_tx_xml(w, r.Form["id"][0])
		return
	}

	w.Write([]byte("<txpool>"))
	network.TxMutex.Lock()
	for _, v := range network.TransactionsToSend {
		if len(r.Form["ownonly"]) > 0 && v.Own == 0 {
			continue
		}
		w.Write([]byte("<tx>"))
		fmt.Fprint(w, "<id>", v.Tx.Hash.String(), "</id>")
		fmt.Fprint(w, "<time>", v.Firstseen.Unix(), "</time>")
		fmt.Fprint(w, "<len>", len(v.Data), "</len>")
		fmt.Fprint(w, "<own>", v.Own, "</own>")
		fmt.Fprint(w, "<firstseen>", v.Firstseen.Unix(), "</firstseen>")
		fmt.Fprint(w, "<invsentcnt>", v.Invsentcnt, "</invsentcnt>")
		fmt.Fprint(w, "<sentcnt>", v.SentCnt, "</sentcnt>")
		fmt.Fprint(w, "<sentlast>", v.Lastsent.Unix(), "</sentlast>")
		fmt.Fprint(w, "<volume>", v.Volume, "</volume>")
		fmt.Fprint(w, "<fee>", v.Fee, "</fee>")
		fmt.Fprint(w, "<blocked>", v.Blocked, "</blocked>")
		w.Write([]byte("</tx>"))
	}
	network.TxMutex.Unlock()
	w.Write([]byte("</txpool>"))
}