Golang btc.NewUint256FromString函數代碼示例

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)
			}
		}
	}
}