Golang btc.NewTx函数代码示例

// Get tx with given id from the balance folder, of from cache
func tx_from_balance(txid *btc.Uint256, error_is_fatal bool) (tx *btc.Tx) {
	if tx = loadedTxs[txid.Hash]; tx != nil {
		return // we have it in cache already
	}
	fn := "balance/" + txid.String() + ".tx"
	buf, er := ioutil.ReadFile(fn)
	if er == nil && buf != nil {
		var th [32]byte
		btc.ShaHash(buf, th[:])
		if txid.Hash == th {
			tx, _ = btc.NewTx(buf)
			if error_is_fatal && tx == nil {
				println("Transaction is corrupt:", txid.String())
				cleanExit(1)
			}
		} else if error_is_fatal {
			println("Transaction file is corrupt:", txid.String())
			cleanExit(1)
		}
	} else if error_is_fatal {
		println("Error reading transaction file:", fn)
		if er != nil {
			println(er.Error())
		}
		cleanExit(1)
	}
	loadedTxs[txid.Hash] = tx // store it in the cache
	return
}

// Handle incoming "tx" msg
func (c *OneConnection) ParseTxNet(pl []byte) {
	if uint32(len(pl)) > atomic.LoadUint32(&common.CFG.TXPool.MaxTxSize) {
		common.CountSafe("TxRejectedBig")
		return
	}
	tx, le := btc.NewTx(pl)
	if tx == nil {
		c.DoS("TxRejectedBroken")
		return
	}
	if le != len(pl) {
		c.DoS("TxRejectedLenMismatch")
		return
	}
	if len(tx.TxIn) < 1 {
		c.Misbehave("TxRejectedNoInputs", 100)
		return
	}

	tx.SetHash(pl)
	NeedThisTx(tx.Hash, func() {
		// This body is called with a locked TxMutex
		tx.Raw = pl
		select {
		case NetTxs <- &TxRcvd{conn: c, tx: tx, raw: pl}:
			TransactionsPending[tx.Hash.BIdx()] = true
		default:
			common.CountSafe("TxRejectedFullQ")
			//println("NetTxsFULL")
		}
	})
}

func execute_test_tx(t *testing.T, tv *testvector) bool {
	if len(tv.inps) == 0 {
		t.Error("Vector has no inputs")
		return false
	}
	rd, er := hex.DecodeString(tv.tx)
	if er != nil {
		t.Error(er.Error())
		return false
	}
	tx, _ := btc.NewTx(rd)
	if tx == nil {
		t.Error("Canot decode tx")
		return false
	}
	tx.Size = uint32(len(rd))
	ha := btc.Sha2Sum(rd)
	tx.Hash = btc.NewUint256(ha[:])

	if skip_broken_tests(tx) {
		return false
	}

	if !tx.IsCoinBase() {
		for i := range tx.TxIn {
			if tx.TxIn[i].Input.IsNull() {
				return false
			}
		}
	}

	oks := 0
	for i := range tx.TxIn {
		var j int
		for j = range tv.inps {
			if bytes.Equal(tx.TxIn[i].Input.Hash[:], tv.inps[j].txid.Hash[:]) &&
				tx.TxIn[i].Input.Vout == uint32(tv.inps[j].vout) {
				break
			}
		}
		if j >= len(tv.inps) {
			t.Error("Matching input not found")
			continue
		}

		pk, er := btc.DecodeScript(tv.inps[j].pkscr)
		if er != nil {
			t.Error(er.Error())
			continue
		}
		var ss []byte
		if tv.inps[j].vout >= 0 {
			ss = tx.TxIn[i].ScriptSig
		}
		if VerifyTxScript(ss, pk, i, tx, tv.ver_flags) {
			oks++
		}
	}
	return oks == len(tx.TxIn)
}

// Handle incoming "tx" msg
func (c *OneConnection) ParseTxNet(pl []byte) {
	tid := btc.NewSha2Hash(pl)
	NeedThisTx(tid, func() {
		// This body is called with a locked TxMutex
		if uint32(len(pl)) > atomic.LoadUint32(&common.CFG.TXPool.MaxTxSize) {
			common.CountSafe("TxTooBig")
			RejectTx(tid, len(pl), TX_REJECTED_TOO_BIG)
			return
		}
		tx, le := btc.NewTx(pl)
		if tx == nil {
			RejectTx(tid, len(pl), TX_REJECTED_FORMAT)
			c.DoS("TxBroken")
			return
		}
		if le != len(pl) {
			RejectTx(tid, len(pl), TX_REJECTED_LEN_MISMATCH)
			c.DoS("TxLenMismatch")
			return
		}
		if len(tx.TxIn) < 1 {
			RejectTx(tid, len(pl), TX_REJECTED_EMPTY_INPUT)
			c.DoS("TxNoInputs")
			return
		}

		tx.Hash = tid
		select {
		case NetTxs <- &TxRcvd{conn: c, tx: tx, raw: pl}:
			TransactionsPending[tid.BIdx()] = true
		default:
			common.CountSafe("NetTxsFULL")
		}
	})
}

func init() {
	rd, _ := hex.DecodeString("0100000001b14bdcbc3e01bdaad36cc08e81e69c82e1060bc14e518db2b49aa43ad90ba26000000000490047304402203f16c6f40162ab686621ef3000b04e75418a0c0cb2d8aebeac894ae360ac1e780220ddc15ecdfc3507ac48e1681a33eb60996631bf6bf5bc0a0682c4db743ce7ca2b01ffffffff0140420f00000000001976a914660d4ef3a743e3e696ad990364e555c271ad504b88ac00000000")
	dummy_tx, _ := btc.NewTx(rd)
	dummy_tx.Size = uint32(len(rd))
	ha := btc.Sha2Sum(rd)
	dummy_tx.Hash = btc.NewUint256(ha[:])
}

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 GetAverageFee() float64 {
	Last.Mutex.Lock()
	end := Last.Block
	Last.Mutex.Unlock()

	LockCfg()
	blocks := CFG.AverageFeeBlocks
	UnlockCfg()
	if blocks <= 0 {
		blocks = 1 // at leats one block
	}

	AverageFeeMutex.Lock()
	defer AverageFeeMutex.Unlock()

	if end.Height == averageFeeLastBlock && averageFeeLastCount == blocks {
		return AverageFee_SPB // we've already calculated for this block
	}

	averageFeeLastBlock = end.Height
	averageFeeLastCount = blocks

	AverageFeeBytes = 0
	AverageFeeTotal = 0

	for blocks > 0 {
		bl, _, e := BlockChain.Blocks.BlockGet(end.BlockHash)
		if e != nil {
			return 0
		}
		block, e := btc.NewBlock(bl)
		if e != nil {
			return 0
		}

		cbasetx, cbasetxlen := btc.NewTx(bl[block.TxOffset:])
		for o := range cbasetx.TxOut {
			AverageFeeTotal += cbasetx.TxOut[o].Value
		}
		AverageFeeTotal -= btc.GetBlockReward(end.Height)

		AverageFeeBytes += uint64(len(bl) - block.TxOffset - cbasetxlen) /*do not count block header and conibase tx */

		blocks--
		end = end.Parent
	}
	if AverageFeeBytes == 0 {
		if AverageFeeTotal != 0 {
			panic("Impossible that miner gest a fee with no transactions in the block")
		}
		AverageFee_SPB = 0
	} else {
		AverageFee_SPB = float64(AverageFeeTotal) / float64(AverageFeeBytes)
	}
	return AverageFee_SPB
}

func BlocksMiner(bl []byte) (string, int) {
	for i, m := range MinerIds {
		if MinedBy(bl, m.Tag) {
			return m.Name, i
		}
	}
	bt, _ := btc.NewBlock(bl)
	cbtx, _ := btc.NewTx(bl[bt.TxOffset:])
	adr := btc.NewAddrFromPkScript(cbtx.TxOut[0].Pk_script, Testnet)
	if adr != nil {
		return adr.String(), -1
	}
	return "", -1
}

func raw_tx_from_file(fn string) *btc.Tx {
	dat := sys.GetRawData(fn)
	if dat == nil {
		fmt.Println("Cannot fetch raw transaction data")
		return nil
	}
	tx, txle := btc.NewTx(dat)
	if tx != nil {
		tx.SetHash(dat)
		if txle != len(dat) {
			fmt.Println("WARNING: Raw transaction length mismatch", txle, len(dat))
		}
	}
	return tx
}

func main() {
	load_dll()
	pkscript, _ := hex.DecodeString("76a9147d22f6c9cca35cb4071971fe442da58546aaeb5988ac")
	d, _ := hex.DecodeString("0100000002232e0afdd9bcad5e3ace8a19ab8ad0ed8cebd6213b098e36cdc8b25af1d5cd30010000006b483045022077768255f192427bd2841555cfc86fdb7332e18c5c530b3b6028cd034a339f9c022100b3876037f63559ca8a2766a86c8dc62d41c869abc539ab983ce8eccf448f117f012102a33ac1e78cd3ff49bde292da2efcf273509d0869fe81571dfb49528c8287a8fcffffffff2fc90cf473e6ce6177818f705f6e96c7ad42f921f23b660ea27f653346e6a8a9010000006a47304402206d5be8061f712fba560b9966e037f7c53cff377b0c15d8c62bd0a2bcb195048602200522601341cdf574e3a39ba0397d8fe5608e37fd46b3fda2684386207ca9bf69012102a33ac1e78cd3ff49bde292da2efcf273509d0869fe81571dfb49528c8287a8fcffffffff0200a86100000000001976a914ff8e92b694527dd77660f873eb3a86eda5ed459f88ac70110100000000001976a9147d22f6c9cca35cb4071971fe442da58546aaeb5988ac00000000")
	tx, _ := btc.NewTx(d)
	i := 0
	flags := uint32(script.STANDARD_VERIFY_FLAGS)
	println(flags)
	res := script.VerifyTxScript(pkscript, i, tx, flags)
	println("Gocoin:", res)
	if use_consensus_lib {
		res = consensus_verify_script(pkscript, i, tx, flags)
		println("Consen:", res)
	}
}

func raw_tx_from_file(fn string) *btc.Tx {
	d, er := ioutil.ReadFile(fn)
	if er != nil {
		fmt.Println(er.Error())
		return nil
	}

	dat, er := hex.DecodeString(string(d))
	if er != nil {
		fmt.Println("hex.DecodeString failed - assume binary transaction file")
		dat = d
	}
	tx, txle := btc.NewTx(dat)

	if tx != nil && txle != len(dat) {
		fmt.Println("WARNING: Raw transaction length mismatch", txle, len(dat))
	}

	return tx
}

func LoadRawTx(buf []byte) (s string) {
	txd, er := hex.DecodeString(string(buf))
	if er != nil {
		txd = buf
	}

	// At this place we should have raw transaction in txd
	tx, le := btc.NewTx(txd)
	if tx == nil || le != len(txd) {
		s += fmt.Sprintln("Could not decode transaction file or it has some extra data")
		return
	}
	tx.SetHash(txd)

	network.TxMutex.Lock()
	defer network.TxMutex.Unlock()
	if _, ok := network.TransactionsToSend[tx.Hash.BIdx()]; ok {
		s += fmt.Sprintln("TxID", tx.Hash.String(), "was already in the pool")
		return
	}

	var missinginp bool
	var totinp, totout uint64
	var sigops uint
	s, missinginp, totinp, totout, sigops, er = DecodeTxSops(tx)
	if er != nil {
		return
	}

	if missinginp {
		network.TransactionsToSend[tx.Hash.BIdx()] = &network.OneTxToSend{Tx: tx, Data: txd, Own: 2, Firstseen: time.Now(),
			Volume: totout, SigopsCost: sigops}
	} else {
		network.TransactionsToSend[tx.Hash.BIdx()] = &network.OneTxToSend{Tx: tx, Data: txd, Own: 1, Firstseen: time.Now(),
			Volume: totinp, Fee: totinp - totout, SigopsCost: sigops}
	}
	network.TransactionsToSendSize += uint64(len(txd))
	s += fmt.Sprintln("Transaction added to the memory pool. Please double check its details above.")
	s += fmt.Sprintln("If it does what you intended, you can send it the network.\nUse TxID:", tx.Hash.String())
	return
}

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

	type one_block struct {
		Height    uint32
		Timestamp uint32
		Hash      string
		TxCnt     int
		Size      int
		Version   uint32
		Reward    uint64
		Miner     string

		Received        uint32
		TimeDl, TimeVer int
		WasteCnt        uint
	}

	var blks []*one_block

	common.Last.Mutex.Lock()
	end := common.Last.Block
	common.Last.Mutex.Unlock()

	for cnt := uint32(0); end != nil && cnt < atomic.LoadUint32(&common.CFG.WebUI.ShowBlocks); cnt++ {
		bl, _, e := common.BlockChain.Blocks.BlockGet(end.BlockHash)
		if e != nil {
			return
		}
		block, e := btc.NewBlock(bl)
		if e != nil {
			return
		}

		b := new(one_block)
		b.Height = end.Height
		b.Timestamp = block.BlockTime()
		b.Hash = end.BlockHash.String()
		b.TxCnt = block.TxCount
		b.Size = len(bl)
		b.Version = block.Version()

		cbasetx, _ := btc.NewTx(bl[block.TxOffset:])
		for o := range cbasetx.TxOut {
			b.Reward += cbasetx.TxOut[o].Value
		}

		b.Miner, _ = common.TxMiner(cbasetx)

		network.MutexRcv.Lock()
		rb := network.ReceivedBlocks[end.BlockHash.BIdx()]
		network.MutexRcv.Unlock()

		b.Received = uint32(rb.Time.Unix())

		if rb.TmDownload != 0 {
			b.TimeDl = int(rb.TmDownload / time.Millisecond)
		} else {
			b.TimeDl = -1
		}

		if rb.TmAccept != 0 {
			b.TimeVer = int(rb.TmAccept / time.Millisecond)
		} else {
			b.TimeVer = -1
		}

		b.WasteCnt = rb.Cnt

		blks = append(blks, b)
		end = end.Parent
	}

	bx, er := json.Marshal(blks)
	if er == nil {
		w.Header()["Content-Type"] = []string{"application/json"}
		w.Write(bx)
	} else {
		println(er.Error())
	}

}

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

	blks := load_template("blocks.html")
	onerow := load_template("blocks_row.html")

	common.Last.Mutex.Lock()
	end := common.Last.Block
	common.Last.Mutex.Unlock()

	for cnt := uint32(0); end != nil && cnt < atomic.LoadUint32(&common.CFG.WebUI.ShowBlocks); cnt++ {
		bl, _, e := common.BlockChain.Blocks.BlockGet(end.BlockHash)
		if e != nil {
			return
		}
		block, e := btc.NewBlock(bl)
		if e != nil {
			return
		}
		cbasetx, _ := btc.NewTx(bl[block.TxOffset:])
		s := onerow

		s = strings.Replace(s, "{BLOCK_NUMBER}", fmt.Sprint(end.Height), 1)
		s = strings.Replace(s, "{BLOCK_TIMESTAMP}",
			time.Unix(int64(block.BlockTime()), 0).Format("Mon 15:04:05"), 1)
		s = strings.Replace(s, "{BLOCK_HASH}", end.BlockHash.String(), 1)
		s = strings.Replace(s, "{BLOCK_TXS}", fmt.Sprint(block.TxCount), 1)
		s = strings.Replace(s, "{BLOCK_SIZE}", fmt.Sprintf("%.1f", float64(len(bl))/1000), 1)
		var rew uint64
		for o := range cbasetx.TxOut {
			rew += cbasetx.TxOut[o].Value
		}
		s = strings.Replace(s, "<!--BLOCK_VERSION-->", fmt.Sprint(block.Version()), 1)
		s = strings.Replace(s, "{BLOCK_REWARD}", fmt.Sprintf("%.2f", float64(rew)/1e8), 1)
		mi, _ := common.TxMiner(cbasetx)
		if len(mi) > 10 {
			mi = mi[:10]
		}
		s = strings.Replace(s, "{BLOCK_MINER}", mi, 1)

		network.MutexRcv.Lock()
		rb := network.ReceivedBlocks[end.BlockHash.BIdx()]
		network.MutexRcv.Unlock()

		if rb.TmDownload != 0 {
			s = strings.Replace(s, "{TIME_TO_DOWNLOAD}", fmt.Sprint(int(rb.TmDownload/time.Millisecond)), 1)
		} else {
			s = strings.Replace(s, "{TIME_TO_DOWNLOAD}", "", 1)
		}
		if rb.TmAccept != 0 {
			s = strings.Replace(s, "{TIME_TO_ACCEPT}", fmt.Sprint(int(rb.TmAccept/time.Millisecond)), 1)
		} else {
			s = strings.Replace(s, "{TIME_TO_ACCEPT}", "", 1)
		}
		if rb.Cnt != 0 {
			s = strings.Replace(s, "{WASTED_BLOCKS}", fmt.Sprint(rb.Cnt), 1)
		} else {
			s = strings.Replace(s, "{WASTED_BLOCKS}", "", 1)
		}
		s = strings.Replace(s, "{TIME_RECEIVED}", rb.Time.Format("15:04:05"), 1)

		blks = templ_add(blks, "<!--BLOCK_ROW-->", s)

		end = end.Parent
	}

	write_html_head(w, r)
	w.Write([]byte(blks))
	write_html_tail(w)
}