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
}
// parse the "-send ..." parameter
func parse_spend() {
outs := strings.Split(*send, ",")
for i := range outs {
tmp := strings.Split(strings.Trim(outs[i], " "), "=")
if len(tmp) != 2 {
println("The otputs must be in a format address1=amount1[,addressN=amountN]")
os.Exit(1)
}
a, e := btc.NewAddrFromString(tmp[0])
if e != nil {
println("NewAddrFromString:", e.Error())
os.Exit(1)
}
am := btc.ParseValue(tmp[1])
sendTo = append(sendTo, oneSendTo{addr: a, amount: am})
spendBtc += am
}
}
func parse_batch() {
f, e := os.Open(*batch)
if e == nil {
defer f.Close()
td := bufio.NewReader(f)
var lcnt int
for {
li, _, _ := td.ReadLine()
if li == nil {
break
}
lcnt++
tmp := strings.SplitN(strings.Trim(string(li), " "), "=", 2)
if len(tmp) < 2 {
println("Error in the batch file line", lcnt)
os.Exit(1)
}
if tmp[0][0] == '#' {
continue // Just a comment-line
}
a, e := btc.NewAddrFromString(tmp[0])
if e != nil {
println("NewAddrFromString:", e.Error())
os.Exit(1)
}
am := btc.ParseValue(tmp[1])
sendTo = append(sendTo, oneSendTo{addr: a, amount: am})
spendBtc += am
}
} else {
println(e.Error())
os.Exit(1)
}
}
func GetTxFromExplorer(txid *btc.Uint256) ([]byte, []byte) {
url := "http://blockexplorer.com/rawtx/" + txid.String()
r, er := http.Get(url)
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 {
// This part looks weird, but this is how I solved seq=FFFFFFFF, if the field not present:
for i := range txx.In {
txx.In[i].Sequence = 0xffffffff
}
json.Unmarshal(c[:], &txx)
// ... end of the weird solution
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
if txx.In[i].Prev_out.N == 0xffffffff &&
txx.In[i].Prev_out.Hash == "0000000000000000000000000000000000000000000000000000000000000000" {
tx.TxIn[i].ScriptSig, _ = hex.DecodeString(txx.In[i].Coinbase)
} else {
tx.TxIn[i].ScriptSig, _ = btc.DecodeScript(txx.In[i].ScriptSig)
}
tx.TxIn[i].Sequence = txx.In[i].Sequence
}
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()
if txx.Size != uint(len(rawtx)) {
fmt.Printf("Transaction size mismatch: %d expexted, %d decoded\n", txx.Size, len(rawtx))
return nil, rawtx
}
curid := btc.NewSha2Hash(rawtx)
if !curid.Equal(txid) {
fmt.Println("The downloaded transaction does not match its ID.", txid.String())
return nil, rawtx
}
return rawtx, rawtx
} else {
fmt.Println("json.Unmarshal:", er.Error())
}
} else {
if er != nil {
fmt.Println("http.Get:", er.Error())
} else {
fmt.Println("StatusCode=", r.StatusCode)
}
}
return nil, nil
}