Golang btc.NewUint256FromString函数代码示例

func xmp_txs2s(w http.ResponseWriter, r *http.Request) {
	if !ipchecker(r) {
		return
	}

	r.ParseForm()

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

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

	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 k, v := range network.TransactionsToSend {
		w.Write([]byte("<tx>"))
		fmt.Fprint(w, "<id>", btc.NewUint256(k[:]).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>"))
}

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())
			}
		}
	}()

	r.ParseForm()
	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.Hash]; ok {
		s, _, _, _, _ := usif.DecodeTx(tx.Tx)
		w.Write([]byte(s))
	} else {
		fmt.Fprintln(w, "Not found")
	}
}

func host_init() {
	BtcRootDir := BitcoinHome()

	if *datadir == "" {
		GocoinHomeDir = BtcRootDir + "gocoin/"
	} else {
		GocoinHomeDir = *datadir + "/"
	}

	if *testnet { // testnet3
		DefaultTcpPort = 18333
		GenesisBlock = btc.NewUint256FromString("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943")
		Magic = [4]byte{0x0B, 0x11, 0x09, 0x07}
		GocoinHomeDir += "tstnet/"
		AddrVersion = 0x6f
		BtcRootDir += "testnet3/"
	} else {
		DefaultTcpPort = 8333
		GenesisBlock = btc.NewUint256FromString("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")
		Magic = [4]byte{0xF9, 0xBE, 0xB4, 0xD9}
		GocoinHomeDir += "btcnet/"
		AddrVersion = 0x00
	}

	fi, e := os.Stat(GocoinHomeDir + "blockchain.idx")
	if e != nil || fi.Size() < 100 {
		os.RemoveAll(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 ask_yes_no("Go you want to import this database into Gocoin?") {
				import_blockchain(BtcRootDir + "blocks")
			}
		}
	}

	fmt.Println("Opening blockchain...")
	sta := time.Now().UnixNano()
	BlockChain = btc.NewChain(GocoinHomeDir, GenesisBlock, *rescan)
	sto := time.Now().UnixNano()
	fmt.Printf("Blockchain open in %.3f seconds\n", float64(sto-sta)/1e9)
	if *nosync {
		BlockChain.DoNotSync = true
		fmt.Println("Syncing is disabled. Switch it on with 'sync' command")
	}
}

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>"))
		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 := btc.VerifyTxScript(tx.TxIn[i].ScriptSig, po.Pk_script, i, tx, true)
				if !ok {
					w.Write([]byte("<status>Script FAILED</status>"))
				} else {
					w.Write([]byte("<status>OK</status>"))
				}
				fmt.Fprint(w, "<value>", po.Value, "</value>")
				fmt.Fprint(w, "<addr>", btc.NewAddrFromPkScript(po.Pk_script, common.Testnet).String(), "</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.Hash]; ok {
		s, _, _, _, _ := usif.DecodeTx(tx.Tx)
		fmt.Println(s)
	} else {
		fmt.Println("No such transaction ID in the memory pool.")
	}
}

func send_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 _, ok := TransactionsToSend[txid.Hash]; !ok {
		fmt.Println("No such transaction ID in the memory pool.")
		list_txs("")
		return
	}
	cnt := NetSendInv(1, txid.Hash[:], nil)
	fmt.Println("Transaction", txid.String(), "broadcasted to", cnt, "node(s)")
	fmt.Println("If it does not appear in the chain, you may want to redo it.")
}

func main() {
	fmt.Println("Gocoin FetchTx version", btc.SourcesTag)

	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 GetTx(txid *btc.Uint256, vout int) bool {
	r, er := http.Get("http://blockexplorer.com/rawtx/" + txid.String())
	if er == nil && r.StatusCode == 200 {
		defer r.Body.Close()
		c, _ := ioutil.ReadAll(r.Body)
		var txx onetx
		er = json.Unmarshal(c[:], &txx)
		if er == nil {
			tx := new(btc.Tx)
			tx.Version = txx.Ver
			tx.TxIn = make([]*btc.TxIn, len(txx.In))
			for i := range txx.In {
				tx.TxIn[i] = new(btc.TxIn)
				tx.TxIn[i].Input.Hash = btc.NewUint256FromString(txx.In[i].Prev_out.Hash).Hash
				tx.TxIn[i].Input.Vout = txx.In[i].Prev_out.N
				tx.TxIn[i].ScriptSig, _ = btc.DecodeScript(txx.In[i].ScriptSig)
				tx.TxIn[i].Sequence = 0xffffffff
			}
			tx.TxOut = make([]*btc.TxOut, len(txx.Out))
			for i := range txx.Out {
				tx.TxOut[i] = new(btc.TxOut)
				tx.TxOut[i].Value = btc.ParseValue(txx.Out[i].Value)
				tx.TxOut[i].Pk_script, _ = btc.DecodeScript(txx.Out[i].ScriptPubKey)
			}
			tx.Lock_time = txx.Lock_time
			rawtx := tx.Serialize()
			curid := btc.NewSha2Hash(rawtx)
			if !curid.Equal(txid) {
				fmt.Println("The downloaded transaction does not match its ID.")
				return false
			}
			ioutil.WriteFile("balance/"+curid.String()+".tx", rawtx, 0666)
			return true
		} else {
			fmt.Println("json.Unmarshal:", er.Error())
		}
	} else {
		if er != nil {
			fmt.Println("http.Get:", er.Error())
		} else {
			fmt.Println("StatusCode=", r.StatusCode)
		}
	}
	return false
}

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.Hash]; !ok {
		network.TxMutex.Unlock()
		fmt.Println("No such transaction ID in the memory pool.")
		list_txs("")
		return
	}
	delete(network.TransactionsToSend, txid.Hash)
	network.TxMutex.Unlock()
	fmt.Println("Transaction", txid.String(), "removed from the memory pool")
}

func send_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()
		cnt := network.NetRouteInv(1, txid, nil)
		ptx.Invsentcnt += cnt
		fmt.Println("INV for TxID", txid.String(), "sent to", cnt, "node(s)")
		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 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.Hash]; 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 main() {
	StartTime = time.Now()

	GenesisBlock := btc.NewUint256FromString("000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f")
	Magic = [4]byte{0xF9, 0xBE, 0xB4, 0xD9}
	GocoinHomeDir = "btcnet" + string(os.PathSeparator)

	BlockChain = btc.NewChain(GocoinHomeDir, GenesisBlock, false)
	if btc.AbortNow || BlockChain == nil {
		return
	}

	new_connection("129.132.230.71")
	//new_connection("198.12.127.2")
	//new_connection("85.17.239.32")
	//new_connection("94.23.228.130")
	//new_connection("129.132.230.75")
	//new_connection("178.63.63.214")
	get_headers()
	return
}

// load the content of the "balance/" folder
func load_balance() {
	var unknownInputs int
	f, e := os.Open("balance/unspent.txt")
	if e != nil {
		println(e.Error())
		os.Exit(1)
	}
	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]
			}

			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)
				}
			}

			uo := UO(uns)
			fnd := false
			for j := range publ_addrs {
				if publ_addrs[j].Owns(uo.Pk_script) {
					unspentOuts = append(unspentOuts, uns)
					unspentOutsLabel = append(unspentOutsLabel, lab)
					totBtc += UO(uns).Value
					fnd = true
					break
				}
			}

			if !fnd {
				unknownInputs++
				if *verbose {
					fmt.Println(uns.String(), "does not belogn to your wallet - ignore it")
				}
			}

		}
	}
	f.Close()
	fmt.Printf("You have %.8f BTC in %d unspent outputs\n", float64(totBtc)/1e8, len(unspentOuts))
	if unknownInputs > 0 {
		fmt.Printf("WARNING: Some inputs (%d) cannot be spent (-v to print them)\n", unknownInputs)
	}
}

func main() {
	fmt.Println("Gocoin blockchain downloader version", btc.SourcesTag)
	parse_command_line()
	setup_runtime_vars()

	if !add_ip_str(SeedNode) {
		println("You need to specify IP address of a fast seed node.")
		println("For example run it like this: downloader -s 89.31.102.237")
		return
	}
	load_ips() // other seed nodes

	if len(GocoinHomeDir) > 0 && GocoinHomeDir[len(GocoinHomeDir)-1] != os.PathSeparator {
		GocoinHomeDir += string(os.PathSeparator)
	}
	if Testnet {
		GocoinHomeDir += "tstnet" + string(os.PathSeparator)
		Magic = [4]byte{0x0B, 0x11, 0x09, 0x07}
		DefaultTcpPort = 18333
		GenesisBlock = btc.NewUint256FromString("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943")
		fmt.Println("Using testnet3")
	} else {
		GocoinHomeDir += "btcnet" + string(os.PathSeparator)
	}
	fmt.Println("GocoinHomeDir:", GocoinHomeDir)

	utils.LockDatabaseDir(GocoinHomeDir)
	defer utils.UnlockDatabaseDir()

	StartTime = time.Now()
	if open_blockchain() {
		fmt.Printf("Blockchain opening aborted\n")
		close_blockchain()
		return
	}
	fmt.Println("Blockchain open in", time.Now().Sub(StartTime))

	go do_usif()

	fmt.Println("Downloading headers from the seed peer", SeedNode)
	download_headers()
	if GlobalExit {
		close_blockchain()
		return
	}

	if DoThePings {
		fmt.Println("Tuning to other peers and trying to find the fastest ones.")
		fmt.Println("Execute command 'g' to continue to block chain download.")
		fmt.Println("Otherwise it will auto-continue after 15 minutes.")
		usif_prompt()
		do_pings()
		fmt.Println("Pings done.")
		usif_prompt()
	}

	var HighestTrustedBlock *btc.Uint256
	if LastTrustedBlock == "all" {
		HighestTrustedBlock = TheBlockChain.BlockTreeEnd.BlockHash
		fmt.Println("Assume all blocks trusted")
	} else if LastTrustedBlock == "auto" {
		if LastBlockHeight > 6 {
			ha := BlocksToGet[LastBlockHeight]
			HighestTrustedBlock = btc.NewUint256(ha[:])
			fmt.Println("Assume last trusted block as", HighestTrustedBlock.String())
		} else {
			fmt.Println("-t=auto ignored since LastBlockHeight is only", LastBlockHeight)
		}
	} else if LastTrustedBlock != "" {
		HighestTrustedBlock = btc.NewUint256FromString(LastTrustedBlock)
	}
	if HighestTrustedBlock != nil {
		for k, h := range BlocksToGet {
			if bytes.Equal(h[:], HighestTrustedBlock.Hash[:]) {
				TrustUpTo = k
				fmt.Println("All the blocks up to", TrustUpTo, "are assumed trusted")
				break
			}
		}
	} else {
		fmt.Println("None of the blocks is to be assumed trusted (it will be very slow).")
	}

	for n := TheBlockChain.BlockTreeEnd; n != nil && n.Height > TheBlockChain.BlockTreeEnd.Height-BSLEN; n = n.Parent {
		blocksize_update(int(n.BlockSize))
	}

	fmt.Println("Downloading blocks - BlocksToGet:", len(BlocksToGet), "  avg_size:", avg_block_size())
	usif_prompt()
	StartTime = time.Now()
	get_blocks()
	fmt.Println("Up to block", TheBlockChain.BlockTreeEnd.Height, "in", time.Now().Sub(StartTime).String())
	close_all_connections()

	close_blockchain()

	return
}