// apply the chnages to the balance folder
func apply_to_balance(tx *btc.Tx) {
f, _ := os.Create("balance/unspent.txt")
if f != nil {
// append new outputs at the end of unspentOuts
ioutil.WriteFile("balance/"+tx.Hash.String()+".tx", tx.Serialize(), 0600)
fmt.Println("Adding", len(tx.TxOut), "new output(s) to the balance/ folder...")
for out := range tx.TxOut {
if k := pkscr_to_key(tx.TxOut[out].Pk_script); k != nil {
uns := new(unspRec)
uns.key = k
uns.TxPrevOut.Hash = tx.Hash.Hash
uns.TxPrevOut.Vout = uint32(out)
uns.label = fmt.Sprint("# ", btc.UintToBtc(tx.TxOut[out].Value), " BTC @ ", k.BtcAddr.String())
//stealth bool TODO: maybe we can fix it...
unspentOuts = append(unspentOuts, uns)
}
}
for j := range unspentOuts {
if !unspentOuts[j].spent {
fmt.Fprintln(f, unspentOuts[j].String())
}
}
f.Close()
} else {
println("ERROR: Cannot create balance/unspent.txt")
}
}
func write_tx_file(tx *btc.Tx) {
signedrawtx := tx.Serialize()
tx.Hash = btc.NewSha2Hash(signedrawtx)
hs := tx.Hash.String()
fmt.Println("TxID", hs)
f, _ := os.Create(hs[:8] + ".txt")
if f != nil {
f.Write([]byte(hex.EncodeToString(signedrawtx)))
f.Close()
fmt.Println("Transaction data stored in", hs[:8]+".txt")
}
}
func consensus_verify_script(pkScr []byte, i int, tx *btc.Tx, ver_flags uint32) bool {
txTo := tx.Serialize()
var pkscr_ptr, pkscr_len uintptr // default to 0/null
if pkScr != nil {
pkscr_ptr = uintptr(unsafe.Pointer(&pkScr[0]))
pkscr_len = uintptr(len(pkScr))
}
r1, _, _ := syscall.Syscall9(bitcoinconsensus_verify_script.Addr(), 7,
pkscr_ptr, pkscr_len,
uintptr(unsafe.Pointer(&txTo[0])), uintptr(len(txTo)),
uintptr(i), uintptr(ver_flags), 0, 0, 0)
return r1 == 1
}
// reorder signatures to meet order of the keys
// remove signatuers made by the same keys
// remove exessive signatures (keeps transaction size down)
func multisig_reorder(tx *btc.Tx) (all_signed bool) {
all_signed = true
for i := range tx.TxIn {
ms, _ := btc.NewMultiSigFromScript(tx.TxIn[i].ScriptSig)
if ms == nil {
continue
}
hash := tx.SignatureHash(ms.P2SH(), i, btc.SIGHASH_ALL)
var sigs []*btc.Signature
for ki := range ms.PublicKeys {
var sig *btc.Signature
for si := range ms.Signatures {
if btc.EcdsaVerify(ms.PublicKeys[ki], ms.Signatures[si].Bytes(), hash) {
//fmt.Println("Key number", ki, "has signature number", si)
sig = ms.Signatures[si]
break
}
}
if sig != nil {
sigs = append(sigs, sig)
} else if *verbose {
fmt.Println("WARNING: Key number", ki, "has no matching signature")
}
if !*allowextramsigns && uint(len(sigs)) >= ms.SigsNeeded {
break
}
}
if *verbose {
if len(ms.Signatures) > len(sigs) {
fmt.Println("WARNING: Some signatures are obsolete and will be removed", len(ms.Signatures), "=>", len(sigs))
} else if len(ms.Signatures) < len(sigs) {
fmt.Println("It appears that same key is re-used.", len(sigs)-len(ms.Signatures), "more signatures were added")
}
}
ms.Signatures = sigs
tx.TxIn[i].ScriptSig = ms.Bytes()
if len(sigs) < int(ms.SigsNeeded) {
all_signed = false
}
}
return
}
// return miner ID of the given coinbase transaction
func TxMiner(cbtx *btc.Tx) (string, int) {
txdat := cbtx.Serialize()
for i, m := range MinerIds {
if bytes.Equal(m.Tag, []byte("_p2pool_")) { // P2Pool
if len(cbtx.TxOut) > 10 &&
bytes.Equal(cbtx.TxOut[len(cbtx.TxOut)-1].Pk_script[:2], []byte{0x6A, 0x28}) {
return m.Name, i
}
} else if bytes.Contains(txdat, m.Tag) {
return m.Name, i
}
}
adr := btc.NewAddrFromPkScript(cbtx.TxOut[0].Pk_script, Testnet)
if adr != nil {
return adr.String(), -1
}
return "", -1
}
func mk_spend_tx(input_tx *btc.Tx, sig_scr []byte, witness [][]byte) (output_tx *btc.Tx) {
output_tx = new(btc.Tx)
output_tx.Version = 1
output_tx.TxIn = []*btc.TxIn{&btc.TxIn{Input: btc.TxPrevOut{Hash: btc.Sha2Sum(input_tx.Serialize()), Vout: 0},
ScriptSig: sig_scr, Sequence: 0xffffffff}}
output_tx.TxOut = []*btc.TxOut{&btc.TxOut{Value: input_tx.TxOut[0].Value}}
// Lock_time = 0
if len(witness) > 0 {
output_tx.SegWit = make([][][]byte, 1)
output_tx.SegWit[0] = witness
if DBG_SCR {
println("tx has", len(witness), "ws")
for xx := range witness {
println("", xx, hex.EncodeToString(witness[xx]))
}
}
}
output_tx.SetHash(output_tx.Serialize())
return
}
func check_consensus(pkScr []byte, amount uint64, i int, tx *btc.Tx, ver_flags uint32, result bool) {
var tmp []byte
if len(pkScr) != 0 {
tmp = make([]byte, len(pkScr))
copy(tmp, pkScr)
}
tx_raw := tx.Raw
if tx_raw == nil {
tx_raw = tx.Serialize()
}
go func(pkScr []byte, txTo []byte, i int, ver_flags uint32, result bool) {
var pkscr_ptr, pkscr_len uintptr // default to 0/null
if pkScr != nil {
pkscr_ptr = uintptr(unsafe.Pointer(&pkScr[0]))
pkscr_len = uintptr(len(pkScr))
}
r1, _, _ := syscall.Syscall9(bitcoinconsensus_verify_script_with_amount.Addr(), 8,
pkscr_ptr, pkscr_len, uintptr(amount),
uintptr(unsafe.Pointer(&txTo[0])), uintptr(len(txTo)),
uintptr(i), uintptr(ver_flags), 0, 0)
res := r1 == 1
atomic.AddUint64(&ConsensusChecks, 1)
if !result {
atomic.AddUint64(&ConsensusExpErr, 1)
}
if res != result {
atomic.AddUint64(&ConsensusErrors, 1)
common.CountSafe("TxConsensusERR")
mut.Lock()
println("Compare to consensus failed!")
println("Gocoin:", result, " ConsLIB:", res)
println("pkScr", hex.EncodeToString(pkScr))
println("txTo", hex.EncodeToString(txTo))
println("amount:", amount, " input_idx:", i, " ver_flags:", ver_flags)
println()
mut.Unlock()
}
}(tmp, tx_raw, i, ver_flags, result)
}
// dump hashes to be signed
func dump_hashes_to_sign(tx *btc.Tx) {
for in := range tx.TxIn {
uo := UO(unspentOuts[in])
if uo == nil {
println("Unknown content of unspent input number", in)
os.Exit(1)
}
var pubad *btc.BtcAddr
if litecoin {
pubad = ltc.NewAddrFromPkScript(uo.Pk_script, testnet)
} else {
pubad = btc.NewAddrFromPkScript(uo.Pk_script, testnet)
}
if pubad != nil {
hash := tx.SignatureHash(uo.Pk_script, in, btc.SIGHASH_ALL)
fmt.Printf("Input #%d:\n\tHash : %s\n\tAddr : %s\n", in, hex.EncodeToString(hash), pubad.String())
} else {
println("Cannot decode pkscript of unspent input number", in)
os.Exit(1)
}
}
}
// apply the chnages to the balance folder
func apply_to_balance(tx *btc.Tx) {
fmt.Println("Applying the transaction to the balance/ folder...")
f, _ := os.Create("balance/unspent.txt")
if f != nil {
for j := 0; j < len(unspentOuts); j++ {
if j > len(tx.TxIn) {
fmt.Fprintln(f, unspentOuts[j], unspentOutsLabel[j])
}
}
if *verbose {
fmt.Println(len(tx.TxIn), "spent output(s) removed from 'balance/unspent.txt'")
}
var addback int
for out := range tx.TxOut {
for j := range publ_addrs {
if publ_addrs[j].Owns(tx.TxOut[out].Pk_script) {
fmt.Fprintf(f, "%s-%03d # %.8f / %s\n", tx.Hash.String(), out,
float64(tx.TxOut[out].Value)/1e8, publ_addrs[j].String())
addback++
}
}
}
f.Close()
if addback > 0 {
f, _ = os.Create("balance/" + tx.Hash.String() + ".tx")
if f != nil {
f.Write(tx.Serialize())
f.Close()
}
if *verbose {
fmt.Println(addback, "new output(s) appended to 'balance/unspent.txt'")
}
}
}
}
// Some tests from the satoshi's json files are not applicable
// ... for our architectre so lets just fake them.
func skip_broken_tests(tx *btc.Tx) bool {
// No inputs
if len(tx.TxIn) == 0 {
return true
}
// Negative output
for i := range tx.TxOut {
if tx.TxOut[i].Value > btc.MAX_MONEY {
return true
}
}
// Duplicate inputs
if len(tx.TxIn) > 1 {
for i := 0; i < len(tx.TxIn)-1; i++ {
for j := i + 1; j < len(tx.TxIn); j++ {
if tx.TxIn[i].Input == tx.TxIn[j].Input {
return true
}
}
}
}
// Coinbase of w wrong size
if tx.IsCoinBase() {
if len(tx.TxIn[0].ScriptSig) < 2 {
return true
}
if len(tx.TxIn[0].ScriptSig) > 100 {
return true
}
}
return false
}
// prepare a signed transaction
func sign_tx(tx *btc.Tx) (all_signed bool) {
all_signed = true
for in := range tx.TxIn {
uo := UO(unspentOuts[in])
var found bool
for j := range publ_addrs {
if publ_addrs[j].Owns(uo.Pk_script) {
er := tx.Sign(in, uo.Pk_script, btc.SIGHASH_ALL, publ_addrs[j].Pubkey, priv_keys[j][:])
if er == nil {
found = true
} else {
fmt.Println("Error signing input", in, "of", len(tx.TxIn))
fmt.Println("...", er.Error())
}
break
}
}
if !found {
fmt.Println("WARNING: You do not have key for", hex.EncodeToString(uo.Pk_script))
all_signed = false
}
}
return
}
func mk_out_tx(sig_scr, pk_scr []byte) (output_tx *btc.Tx) {
// We build input_tx only to calculate it's hash for output_tx
input_tx := new(btc.Tx)
input_tx.Version = 1
input_tx.TxIn = []*btc.TxIn{&btc.TxIn{Input: btc.TxPrevOut{Vout: 0xffffffff},
ScriptSig: []byte{0, 0}, Sequence: 0xffffffff}}
input_tx.TxOut = []*btc.TxOut{&btc.TxOut{Pk_script: pk_scr}}
// Lock_time = 0
output_tx = new(btc.Tx)
output_tx.Version = 1
output_tx.TxIn = []*btc.TxIn{&btc.TxIn{Input: btc.TxPrevOut{Hash: btc.Sha2Sum(input_tx.Serialize()), Vout: 0},
ScriptSig: sig_scr, Sequence: 0xffffffff}}
output_tx.TxOut = []*btc.TxOut{&btc.TxOut{}}
// Lock_time = 0
return
}
func write_tx_file(tx *btc.Tx) {
var signedrawtx []byte
if tx.SegWit != nil {
signedrawtx = tx.SerializeNew()
} else {
signedrawtx = tx.Serialize()
}
tx.SetHash(signedrawtx)
hs := tx.Hash.String()
fmt.Println("TxID", hs)
f, _ := os.Create(hs[:8] + ".txt")
if f != nil {
f.Write([]byte(hex.EncodeToString(signedrawtx)))
f.Close()
fmt.Println("Transaction data stored in", hs[:8]+".txt")
}
}
// prepare a signed transaction
func sign_tx(tx *btc.Tx) (all_signed bool) {
var multisig_done bool
all_signed = true
// go through each input
for in := range tx.TxIn {
if ms, _ := btc.NewMultiSigFromScript(tx.TxIn[in].ScriptSig); ms != nil {
hash := tx.SignatureHash(ms.P2SH(), in, btc.SIGHASH_ALL)
for ki := range ms.PublicKeys {
k := public_to_key(ms.PublicKeys[ki])
if k != nil {
r, s, e := btc.EcdsaSign(k.Key, hash)
if e != nil {
println("ERROR in sign_tx:", e.Error())
all_signed = false
} else {
btcsig := &btc.Signature{HashType: 0x01}
btcsig.R.Set(r)
btcsig.S.Set(s)
ms.Signatures = append(ms.Signatures, btcsig)
tx.TxIn[in].ScriptSig = ms.Bytes()
multisig_done = true
}
}
}
} else {
uo := getUO(&tx.TxIn[in].Input)
if uo == nil {
println("ERROR: Unkown input:", tx.TxIn[in].Input.String(), "- missing balance folder?")
all_signed = false
continue
}
adr := addr_from_pkscr(uo.Pk_script)
if adr == nil {
fmt.Println("WARNING: Don't know how to sign input number", in)
fmt.Println(" Pk_script:", hex.EncodeToString(uo.Pk_script))
all_signed = false
continue
}
k := hash_to_key(adr.Hash160)
if k == nil {
fmt.Println("WARNING: You do not have key for", adr.String(), "at input", in)
all_signed = false
continue
}
er := tx.Sign(in, uo.Pk_script, btc.SIGHASH_ALL, k.BtcAddr.Pubkey, k.Key)
if er != nil {
fmt.Println("ERROR: Sign failed for input number", in, er.Error())
all_signed = false
}
}
}
// reorder signatures if we signed any multisig inputs
if multisig_done && !multisig_reorder(tx) {
all_signed = false
}
if !all_signed {
fmt.Println("WARNING: Not all the inputs have been signed")
}
return
}
// prepare a signed transaction
func make_signed_tx() {
// Make an empty transaction
tx := new(btc.Tx)
tx.Version = 1
tx.Lock_time = 0
// Select as many inputs as we need to pay the full amount (with the fee)
var btcsofar uint64
for inpcnt := 0; inpcnt < len(unspentOuts); inpcnt++ {
uo := UO(unspentOuts[inpcnt])
// add the input to our transaction:
tin := new(btc.TxIn)
tin.Input = *unspentOuts[inpcnt]
tin.Sequence = 0xffffffff
tx.TxIn = append(tx.TxIn, tin)
btcsofar += uo.Value
if !*useallinputs && (btcsofar >= spendBtc+feeBtc) {
break
}
}
changeBtc = btcsofar - (spendBtc + feeBtc)
if *verbose {
fmt.Printf("Spending %d out of %d outputs...\n", len(tx.TxIn), len(unspentOuts))
}
// Build transaction outputs:
for o := range sendTo {
outs, er := btc.NewSpendOutputs(sendTo[o].addr, sendTo[o].amount, testnet)
if er != nil {
fmt.Println("ERROR:", er.Error())
os.Exit(1)
}
tx.TxOut = append(tx.TxOut, outs...)
}
if changeBtc > 0 {
// Add one more output (with the change)
chad := get_change_addr()
if *verbose {
fmt.Println("Sending change", changeBtc, "to", chad.String())
}
outs, er := btc.NewSpendOutputs(chad, changeBtc, testnet)
if er != nil {
fmt.Println("ERROR:", er.Error())
os.Exit(1)
}
tx.TxOut = append(tx.TxOut, outs...)
}
if *message != "" {
// Add NULL output with an arbitrary message
scr := new(bytes.Buffer)
scr.WriteByte(0x6a) // OP_RETURN
btc.WritePutLen(scr, uint32(len(*message)))
scr.Write([]byte(*message))
tx.TxOut = append(tx.TxOut, &btc.TxOut{Value: 0, Pk_script: scr.Bytes()})
}
if *hashes {
dump_hashes_to_sign(tx)
} else {
signed := sign_tx(tx)
write_tx_file(tx)
if apply2bal && signed {
apply_to_balance(tx)
}
}
}
// prepare a signed transaction
func make_signed_tx() {
// Make an empty transaction
tx := new(btc.Tx)
tx.Version = 1
tx.Lock_time = 0
// Select as many inputs as we need to pay the full amount (with the fee)
var btcsofar uint64
for i := range unspentOuts {
if unspentOuts[i].key == nil {
continue
}
uo := getUO(&unspentOuts[i].TxPrevOut)
// add the input to our transaction:
tin := new(btc.TxIn)
tin.Input = unspentOuts[i].TxPrevOut
tin.Sequence = uint32(*sequence)
tx.TxIn = append(tx.TxIn, tin)
btcsofar += uo.Value
unspentOuts[i].spent = true
if !*useallinputs && (btcsofar >= spendBtc+feeBtc) {
break
}
}
if btcsofar < (spendBtc + feeBtc) {
fmt.Println("ERROR: You have", btc.UintToBtc(btcsofar), "BTC, but you need",
btc.UintToBtc(spendBtc+feeBtc), "BTC for the transaction")
cleanExit(1)
}
changeBtc = btcsofar - (spendBtc + feeBtc)
if *verbose {
fmt.Printf("Spending %d out of %d outputs...\n", len(tx.TxIn), len(unspentOuts))
}
// Build transaction outputs:
for o := range sendTo {
outs, er := btc.NewSpendOutputs(sendTo[o].addr, sendTo[o].amount, testnet)
if er != nil {
fmt.Println("ERROR:", er.Error())
cleanExit(1)
}
tx.TxOut = append(tx.TxOut, outs...)
}
if changeBtc > 0 {
// Add one more output (with the change)
chad := get_change_addr()
if *verbose {
fmt.Println("Sending change", changeBtc, "to", chad.String())
}
outs, er := btc.NewSpendOutputs(chad, changeBtc, testnet)
if er != nil {
fmt.Println("ERROR:", er.Error())
cleanExit(1)
}
tx.TxOut = append(tx.TxOut, outs...)
}
if *message != "" {
// Add NULL output with an arbitrary message
scr := new(bytes.Buffer)
scr.WriteByte(0x6a) // OP_RETURN
btc.WritePutLen(scr, uint32(len(*message)))
scr.Write([]byte(*message))
tx.TxOut = append(tx.TxOut, &btc.TxOut{Value: 0, Pk_script: scr.Bytes()})
}
signed := sign_tx(tx)
write_tx_file(tx)
if apply2bal && signed {
apply_to_balance(tx)
}
}
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
}
}
}
if pay_cmd == "" {
err = "No inputs selected"
goto error
}
am, er := btc.StringToSatoshis(r.Form["txfee"][0])
if er != nil {
err = "Incorrect fee value: " + r.Form["txfee"][0]
goto error
}
pay_cmd += " -fee " + r.Form["txfee"][0]
spentsofar += am
if len(r.Form["change"][0]) > 1 {
addr, er := btc.NewAddrFromString(r.Form["change"][0])
if er != nil {
err = "Incorrect change address: " + r.Form["change"][0]
goto error
}
change_addr = addr
}
pay_cmd += " -change " + change_addr.String()
if totalinput > spentsofar {
// Add change output
outs, er := btc.NewSpendOutputs(change_addr, totalinput-spentsofar, common.CFG.Testnet)
if er != nil {
err = er.Error()
goto error
}
tx.TxOut = append(tx.TxOut, outs...)
}
buf := new(bytes.Buffer)
zi := zip.NewWriter(buf)
was_tx := make(map[[32]byte]bool, len(thisbal))
for i := range thisbal {
if was_tx[thisbal[i].TxPrevOut.Hash] {
continue
}
was_tx[thisbal[i].TxPrevOut.Hash] = true
txid := btc.NewUint256(thisbal[i].TxPrevOut.Hash[:])
fz, _ := zi.Create("balance/" + txid.String() + ".tx")
wallet.GetRawTransaction(thisbal[i].MinedAt, txid, fz)
}
fz, _ := zi.Create("balance/unspent.txt")
for i := range thisbal {
fmt.Fprintln(fz, thisbal[i].UnspentTextLine())
}
if len(addrs_to_msign) > 0 {
// Multisig (or mixed) transaction ...
for i := range multisig_input {
if multisig_input[i] == nil {
continue
}
d, er := hex.DecodeString(multisig_input[i].RedeemScript)
if er != nil {
println("ERROR parsing hex RedeemScript:", er.Error())
continue
}
ms, er := btc.NewMultiSigFromP2SH(d)
if er != nil {
println("ERROR parsing bin RedeemScript:", er.Error())
continue
}
tx.TxIn[i].ScriptSig = ms.Bytes()
}
fz, _ = zi.Create("multi_" + common.CFG.PayCommandName)
fmt.Fprintln(fz, "wallet -raw tx2sign.txt")
for k, _ := range addrs_to_msign {
fmt.Fprintln(fz, "wallet -msign", k, "-raw ...")
}
} else {
if pay_cmd != "" {
fz, _ = zi.Create(common.CFG.PayCommandName)
fz.Write([]byte(pay_cmd))
}
}
// Non-multisig transaction ...
fz, _ = zi.Create("tx2sign.txt")
fz.Write([]byte(hex.EncodeToString(tx.Serialize())))
zi.Close()
w.Header()["Content-Type"] = []string{"application/zip"}
w.Write(buf.Bytes())
return
} else {
err = "Bad request"
}
error:
s := load_template("send_error.html")
write_html_head(w, r)
s = strings.Replace(s, "<!--ERROR_MSG-->", err, 1)
w.Write([]byte(s))
write_html_tail(w)
}
func DecodeTxSops(tx *btc.Tx) (s string, missinginp bool, totinp, totout uint64, sigops uint, e error) {
s += fmt.Sprintln("Transaction details (for your information):")
s += fmt.Sprintln(len(tx.TxIn), "Input(s):")
sigops = btc.WITNESS_SCALE_FACTOR * tx.GetLegacySigOpCount()
for i := range tx.TxIn {
s += fmt.Sprintf(" %3d %s", i, tx.TxIn[i].Input.String())
var po *btc.TxOut
inpid := btc.NewUint256(tx.TxIn[i].Input.Hash[:])
if txinmem, ok := network.TransactionsToSend[inpid.BIdx()]; ok {
s += fmt.Sprint(" mempool")
if int(tx.TxIn[i].Input.Vout) >= len(txinmem.TxOut) {
s += fmt.Sprintf(" - Vout TOO BIG (%d/%d)!", int(tx.TxIn[i].Input.Vout), len(txinmem.TxOut))
} else {
po = txinmem.TxOut[tx.TxIn[i].Input.Vout]
}
} else {
po, _ = common.BlockChain.Unspent.UnspentGet(&tx.TxIn[i].Input)
if po != nil {
s += fmt.Sprintf("%8d", po.BlockHeight)
}
}
if po != nil {
ok := script.VerifyTxScript(po.Pk_script, po.Value, i, tx, script.VER_P2SH|script.VER_DERSIG|script.VER_CLTV)
if !ok {
s += fmt.Sprintln("\nERROR: The transacion does not have a valid signature.")
e = errors.New("Invalid signature")
return
}
totinp += po.Value
ads := "???"
if ad := btc.NewAddrFromPkScript(po.Pk_script, common.Testnet); ad != nil {
ads = ad.String()
}
s += fmt.Sprintf(" %15.8f BTC @ %s", float64(po.Value)/1e8, ads)
if btc.IsP2SH(po.Pk_script) {
so := btc.WITNESS_SCALE_FACTOR * btc.GetP2SHSigOpCount(tx.TxIn[i].ScriptSig)
s += fmt.Sprintf(" + %d sigops", so)
sigops += so
}
swo := tx.CountWitnessSigOps(i, po.Pk_script)
if swo > 0 {
s += fmt.Sprintf(" + %d segops", swo)
sigops += swo
}
s += "\n"
} else {
s += fmt.Sprintln(" - UNKNOWN INPUT")
missinginp = true
}
}
s += fmt.Sprintln(len(tx.TxOut), "Output(s):")
for i := range tx.TxOut {
totout += tx.TxOut[i].Value
adr := btc.NewAddrFromPkScript(tx.TxOut[i].Pk_script, common.Testnet)
if adr != nil {
s += fmt.Sprintf(" %15.8f BTC to adr %s\n", float64(tx.TxOut[i].Value)/1e8, adr.String())
} else {
s += fmt.Sprintf(" %15.8f BTC to scr %s\n", float64(tx.TxOut[i].Value)/1e8, hex.EncodeToString(tx.TxOut[i].Pk_script))
}
}
if missinginp {
s += fmt.Sprintln("WARNING: There are missing inputs and we cannot calc input BTC amount.")
s += fmt.Sprintln("If there is somethign wrong with this transaction, you can loose money...")
} else {
s += fmt.Sprintf("All OK: %.8f BTC in -> %.8f BTC out, with %.8f BTC fee\n", float64(totinp)/1e8,
float64(totout)/1e8, float64(totinp-totout)/1e8)
}
s += fmt.Sprintln("ECDSA sig operations : ", sigops)
return
}
func output_tx_xml(w http.ResponseWriter, tx *btc.Tx) {
w.Write([]byte("<input_list>"))
for i := range tx.TxIn {
w.Write([]byte("<input>"))
w.Write([]byte("<script_sig>"))
w.Write([]byte(hex.EncodeToString(tx.TxIn[i].ScriptSig)))
w.Write([]byte("</script_sig>"))
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(po.Pk_script, po.Value, i, tx, script.STANDARD_VERIFY_FLAGS)
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, "<pkscript>", hex.EncodeToString(po.Pk_script), "</pkscript>")
if ad := btc.NewAddrFromPkScript(po.Pk_script, common.Testnet); ad != nil {
fmt.Fprint(w, "<addr>", ad.String(), "</addr>")
}
fmt.Fprint(w, "<block>", po.BlockHeight, "</block>")
if btc.IsP2SH(po.Pk_script) {
fmt.Fprint(w, "<input_sigops>", btc.WITNESS_SCALE_FACTOR*btc.GetP2SHSigOpCount(tx.TxIn[i].ScriptSig), "</input_sigops>")
}
fmt.Fprint(w, "<witness_sigops>", tx.CountWitnessSigOps(i, po.Pk_script), "</witness_sigops>")
} else {
w.Write([]byte("<status>UNKNOWN INPUT</status>"))
}
fmt.Fprint(w, "<sequence>", tx.TxIn[i].Sequence, "</sequence>")
if tx.SegWit != nil {
w.Write([]byte("<segwit>"))
for _, wit := range tx.SegWit[i] {
w.Write([]byte("<witness>"))
w.Write([]byte(hex.EncodeToString(wit)))
w.Write([]byte("</witness>"))
}
w.Write([]byte("</segwit>"))
}
w.Write([]byte("</input>"))
}
w.Write([]byte("</input_list>"))
w.Write([]byte("<output_list>"))
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("</output_list>"))
}
func evalScript(p []byte, stack *scrStack, tx *btc.Tx, inp int, ver_flags uint32) bool {
if DBG_SCR {
fmt.Println("script len", len(p))
}
if len(p) > 10000 {
if DBG_ERR {
fmt.Println("script too long", len(p))
}
return false
}
defer func() {
if r := recover(); r != nil {
if DBG_ERR {
err, ok := r.(error)
if !ok {
err = fmt.Errorf("pkg: %v", r)
}
fmt.Println("evalScript panic:", err.Error())
fmt.Println(string(debug.Stack()))
}
}
}()
var exestack scrStack
var altstack scrStack
sta, idx, opcnt := 0, 0, 0
checkMinVals := (ver_flags & VER_MINDATA) != 0
for idx < len(p) {
inexec := exestack.nofalse()
// Read instruction
opcode, pushval, n, e := btc.GetOpcode(p[idx:])
if e != nil {
//fmt.Println(e.Error())
//fmt.Println("A", idx, hex.EncodeToString(p))
return false
}
idx += n
if DBG_SCR {
fmt.Printf("\nExecuting opcode 0x%02x n=%d inexec:%t push:%s..\n",
opcode, n, inexec, hex.EncodeToString(pushval))
stack.print()
}
if pushval != nil && len(pushval) > btc.MAX_SCRIPT_ELEMENT_SIZE {
if DBG_ERR {
fmt.Println("pushval too long", len(pushval))
}
return false
}
if opcode > 0x60 {
opcnt++
if opcnt > 201 {
if DBG_ERR {
fmt.Println("evalScript: too many opcodes A")
}
return false
}
}
if opcode == 0x7e /*OP_CAT*/ ||
opcode == 0x7f /*OP_SUBSTR*/ ||
opcode == 0x80 /*OP_LEFT*/ ||
opcode == 0x81 /*OP_RIGHT*/ ||
opcode == 0x83 /*OP_INVERT*/ ||
opcode == 0x84 /*OP_AND*/ ||
opcode == 0x85 /*OP_OR*/ ||
opcode == 0x86 /*OP_XOR*/ ||
opcode == 0x8d /*OP_2MUL*/ ||
opcode == 0x8e /*OP_2DIV*/ ||
opcode == 0x95 /*OP_MUL*/ ||
opcode == 0x96 /*OP_DIV*/ ||
opcode == 0x97 /*OP_MOD*/ ||
opcode == 0x98 /*OP_LSHIFT*/ ||
opcode == 0x99 /*OP_RSHIFT*/ {
if DBG_ERR {
fmt.Println("Unsupported opcode", opcode)
}
return false
}
if inexec && 0 <= opcode && opcode <= btc.OP_PUSHDATA4 {
if checkMinVals && !checkMinimalPush(pushval, opcode) {
if DBG_ERR {
fmt.Println("Push value not in a minimal format", hex.EncodeToString(pushval))
}
return false
}
stack.push(pushval)
if DBG_SCR {
fmt.Println("pushed", len(pushval), "bytes")
}
} else if inexec || (0x63 /*OP_IF*/ <= opcode && opcode <= 0x68 /*OP_ENDIF*/) {
switch {
case opcode == 0x4f: // OP_1NEGATE
stack.pushInt(-1)
case opcode >= 0x51 && opcode <= 0x60: // OP_1-OP_16
stack.pushInt(int64(opcode - 0x50))
case opcode == 0x61: // OP_NOP
// Do nothing
/* - not handled
OP_VER = 0x62
*/
case opcode == 0x63 || opcode == 0x64: //OP_IF || OP_NOTIF
// <expression> if [statements] [else [statements]] endif
val := false
if inexec {
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for", opcode)
}
return false
}
if opcode == 0x63 /*OP_IF*/ {
val = stack.popBool()
} else {
val = !stack.popBool()
}
}
if DBG_SCR {
fmt.Println(inexec, "if pushing", val, "...")
}
exestack.pushBool(val)
/* - not handled
OP_VERIF = 0x65,
OP_VERNOTIF = 0x66,
*/
case opcode == 0x67: //OP_ELSE
if exestack.size() == 0 {
if DBG_ERR {
fmt.Println("exestack empty in OP_ELSE")
}
}
exestack.pushBool(!exestack.popBool())
case opcode == 0x68: //OP_ENDIF
if exestack.size() == 0 {
if DBG_ERR {
fmt.Println("exestack empty in OP_ENDIF")
}
}
exestack.pop()
case opcode == 0x69: //OP_VERIFY
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
if !stack.topBool(-1) {
return false
}
stack.pop()
case opcode == 0x6b: //OP_TOALTSTACK
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
altstack.push(stack.pop())
case opcode == 0x6c: //OP_FROMALTSTACK
if altstack.size() < 1 {
if DBG_ERR {
fmt.Println("AltStack too short for opcode", opcode)
}
return false
}
stack.push(altstack.pop())
case opcode == 0x6d: //OP_2DROP
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pop()
stack.pop()
case opcode == 0x6e: //OP_2DUP
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x1 := stack.top(-1)
x2 := stack.top(-2)
stack.push(x2)
stack.push(x1)
case opcode == 0x6f: //OP_3DUP
if stack.size() < 3 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x1 := stack.top(-3)
x2 := stack.top(-2)
x3 := stack.top(-1)
stack.push(x1)
stack.push(x2)
stack.push(x3)
case opcode == 0x70: //OP_2OVER
if stack.size() < 4 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x1 := stack.top(-4)
x2 := stack.top(-3)
stack.push(x1)
stack.push(x2)
case opcode == 0x71: //OP_2ROT
// (x1 x2 x3 x4 x5 x6 -- x3 x4 x5 x6 x1 x2)
if stack.size() < 6 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x6 := stack.pop()
x5 := stack.pop()
x4 := stack.pop()
x3 := stack.pop()
x2 := stack.pop()
x1 := stack.pop()
stack.push(x3)
stack.push(x4)
stack.push(x5)
stack.push(x6)
stack.push(x1)
stack.push(x2)
case opcode == 0x72: //OP_2SWAP
// (x1 x2 x3 x4 -- x3 x4 x1 x2)
if stack.size() < 4 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x4 := stack.pop()
x3 := stack.pop()
x2 := stack.pop()
x1 := stack.pop()
stack.push(x3)
stack.push(x4)
stack.push(x1)
stack.push(x2)
case opcode == 0x73: //OP_IFDUP
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
if stack.topBool(-1) {
stack.push(stack.top(-1))
}
case opcode == 0x74: //OP_DEPTH
stack.pushInt(int64(stack.size()))
case opcode == 0x75: //OP_DROP
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pop()
case opcode == 0x76: //OP_DUP
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
el := stack.pop()
stack.push(el)
stack.push(el)
case opcode == 0x77: //OP_NIP
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x := stack.pop()
stack.pop()
stack.push(x)
case opcode == 0x78: //OP_OVER
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.push(stack.top(-2))
case opcode == 0x79 || opcode == 0x7a: //OP_PICK || OP_ROLL
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
n := stack.popInt(checkMinVals)
if n < 0 || n >= int64(stack.size()) {
if DBG_ERR {
fmt.Println("Wrong n for opcode", opcode)
}
return false
}
if opcode == 0x79 /*OP_PICK*/ {
stack.push(stack.top(int(-1 - n)))
} else if n > 0 {
tmp := make([][]byte, n)
for i := range tmp {
tmp[i] = stack.pop()
}
xn := stack.pop()
for i := len(tmp) - 1; i >= 0; i-- {
stack.push(tmp[i])
}
stack.push(xn)
}
case opcode == 0x7b: //OP_ROT
if stack.size() < 3 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x3 := stack.pop()
x2 := stack.pop()
x1 := stack.pop()
stack.push(x2)
stack.push(x3)
stack.push(x1)
case opcode == 0x7c: //OP_SWAP
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x1 := stack.pop()
x2 := stack.pop()
stack.push(x1)
stack.push(x2)
case opcode == 0x7d: //OP_TUCK
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
x1 := stack.pop()
x2 := stack.pop()
stack.push(x1)
stack.push(x2)
stack.push(x1)
case opcode == 0x82: //OP_SIZE
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pushInt(int64(len(stack.top(-1))))
case opcode == 0x87 || opcode == 0x88: //OP_EQUAL || OP_EQUALVERIFY
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
a := stack.pop()
b := stack.pop()
if opcode == 0x88 { //OP_EQUALVERIFY
if !bytes.Equal(a, b) {
return false
}
} else {
stack.pushBool(bytes.Equal(a, b))
}
/* - not handled
OP_RESERVED1 = 0x89,
OP_RESERVED2 = 0x8a,
*/
case opcode == 0x8b: //OP_1ADD
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pushInt(stack.popInt(checkMinVals) + 1)
case opcode == 0x8c: //OP_1SUB
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pushInt(stack.popInt(checkMinVals) - 1)
case opcode == 0x8f: //OP_NEGATE
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pushInt(-stack.popInt(checkMinVals))
case opcode == 0x90: //OP_ABS
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
a := stack.popInt(checkMinVals)
if a < 0 {
stack.pushInt(-a)
} else {
stack.pushInt(a)
}
case opcode == 0x91: //OP_NOT
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
stack.pushBool(stack.popInt(checkMinVals) == 0)
case opcode == 0x92: //OP_0NOTEQUAL
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
d := stack.pop()
if checkMinVals && len(d) > 1 {
if DBG_ERR {
fmt.Println("Not minimal bool value", hex.EncodeToString(d))
}
return false
}
stack.pushBool(bts2bool(d))
case opcode == 0x93 || //OP_ADD
opcode == 0x94 || //OP_SUB
opcode == 0x9a || //OP_BOOLAND
opcode == 0x9b || //OP_BOOLOR
opcode == 0x9c || opcode == 0x9d || //OP_NUMEQUAL || OP_NUMEQUALVERIFY
opcode == 0x9e || //OP_NUMNOTEQUAL
opcode == 0x9f || //OP_LESSTHAN
opcode == 0xa0 || //OP_GREATERTHAN
opcode == 0xa1 || //OP_LESSTHANOREQUAL
opcode == 0xa2 || //OP_GREATERTHANOREQUAL
opcode == 0xa3 || //OP_MIN
opcode == 0xa4: //OP_MAX
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
bn2 := stack.popInt(checkMinVals)
bn1 := stack.popInt(checkMinVals)
var bn int64
switch opcode {
case 0x93:
bn = bn1 + bn2 // OP_ADD
case 0x94:
bn = bn1 - bn2 // OP_SUB
case 0x9a:
bn = b2i(bn1 != 0 && bn2 != 0) // OP_BOOLAND
case 0x9b:
bn = b2i(bn1 != 0 || bn2 != 0) // OP_BOOLOR
case 0x9c:
bn = b2i(bn1 == bn2) // OP_NUMEQUAL
case 0x9d:
bn = b2i(bn1 == bn2) // OP_NUMEQUALVERIFY
case 0x9e:
bn = b2i(bn1 != bn2) // OP_NUMNOTEQUAL
case 0x9f:
bn = b2i(bn1 < bn2) // OP_LESSTHAN
case 0xa0:
bn = b2i(bn1 > bn2) // OP_GREATERTHAN
case 0xa1:
bn = b2i(bn1 <= bn2) // OP_LESSTHANOREQUAL
case 0xa2:
bn = b2i(bn1 >= bn2) // OP_GREATERTHANOREQUAL
case 0xa3: // OP_MIN
if bn1 < bn2 {
bn = bn1
} else {
bn = bn2
}
case 0xa4: // OP_MAX
if bn1 > bn2 {
bn = bn1
} else {
bn = bn2
}
default:
panic("invalid opcode")
}
if opcode == 0x9d { //OP_NUMEQUALVERIFY
if bn == 0 {
return false
}
} else {
stack.pushInt(bn)
}
case opcode == 0xa5: //OP_WITHIN
if stack.size() < 3 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
bn3 := stack.popInt(checkMinVals)
bn2 := stack.popInt(checkMinVals)
bn1 := stack.popInt(checkMinVals)
stack.pushBool(bn2 <= bn1 && bn1 < bn3)
case opcode == 0xa6: //OP_RIPEMD160
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
rim := ripemd160.New()
rim.Write(stack.pop()[:])
stack.push(rim.Sum(nil)[:])
case opcode == 0xa7: //OP_SHA1
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
sha := sha1.New()
sha.Write(stack.pop()[:])
stack.push(sha.Sum(nil)[:])
case opcode == 0xa8: //OP_SHA256
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
sha := sha256.New()
sha.Write(stack.pop()[:])
stack.push(sha.Sum(nil)[:])
case opcode == 0xa9: //OP_HASH160
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
rim160 := btc.Rimp160AfterSha256(stack.pop())
stack.push(rim160[:])
case opcode == 0xaa: //OP_HASH256
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
h := btc.Sha2Sum(stack.pop())
stack.push(h[:])
case opcode == 0xab: // OP_CODESEPARATOR
sta = idx
case opcode == 0xac || opcode == 0xad: // OP_CHECKSIG || OP_CHECKSIGVERIFY
if stack.size() < 2 {
if DBG_ERR {
fmt.Println("Stack too short for opcode", opcode)
}
return false
}
var ok bool
pk := stack.pop()
si := stack.pop()
// BIP-0066
if !CheckSignatureEncoding(si, ver_flags) {
if DBG_ERR {
fmt.Println("Invalid Signature Encoding A")
}
return false
}
if len(si) > 0 {
sh := tx.SignatureHash(delSig(p[sta:], si), inp, int32(si[len(si)-1]))
ok = btc.EcdsaVerify(pk, si, sh)
}
if !ok && DBG_ERR {
if DBG_ERR {
fmt.Println("EcdsaVerify fail 1")
}
}
if DBG_SCR {
fmt.Println("ver:", ok)
}
if opcode == 0xad {
if !ok { // OP_CHECKSIGVERIFY
return false
}
} else { // OP_CHECKSIG
stack.pushBool(ok)
}
case opcode == 0xae || opcode == 0xaf: //OP_CHECKMULTISIG || OP_CHECKMULTISIGVERIFY
//fmt.Println("OP_CHECKMULTISIG ...")
//stack.print()
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("OP_CHECKMULTISIG: Stack too short A")
}
return false
}
i := 1
keyscnt := stack.topInt(-i, checkMinVals)
if keyscnt < 0 || keyscnt > 20 {
fmt.Println("OP_CHECKMULTISIG: Wrong number of keys")
return false
}
opcnt += int(keyscnt)
if opcnt > 201 {
if DBG_ERR {
fmt.Println("evalScript: too many opcodes B")
}
return false
}
i++
ikey := i
i += int(keyscnt)
if stack.size() < i {
if DBG_ERR {
fmt.Println("OP_CHECKMULTISIG: Stack too short B")
}
return false
}
sigscnt := stack.topInt(-i, checkMinVals)
if sigscnt < 0 || sigscnt > keyscnt {
fmt.Println("OP_CHECKMULTISIG: sigscnt error")
return false
}
i++
isig := i
i += int(sigscnt)
if stack.size() < i {
if DBG_ERR {
fmt.Println("OP_CHECKMULTISIG: Stack too short C")
}
return false
}
xxx := p[sta:]
for k := 0; k < int(sigscnt); k++ {
xxx = delSig(xxx, stack.top(-isig-k))
}
success := true
for sigscnt > 0 {
pk := stack.top(-ikey)
si := stack.top(-isig)
// BIP-0066
if !CheckSignatureEncoding(si, ver_flags) {
if DBG_ERR {
fmt.Println("Invalid Signature Encoding B")
}
return false
}
if len(si) > 0 {
sh := tx.SignatureHash(xxx, inp, int32(si[len(si)-1]))
if btc.EcdsaVerify(pk, si, sh) {
isig++
sigscnt--
}
}
ikey++
keyscnt--
// If there are more signatures left than keys left,
// then too many signatures have failed
if sigscnt > keyscnt {
success = false
break
}
}
for i > 0 {
i--
stack.pop()
}
if opcode == 0xaf {
if !success { // OP_CHECKMULTISIGVERIFY
return false
}
} else {
stack.pushBool(success)
}
case opcode >= 0xb1: //OP_NOP2 or OP_CHECKLOCKTIMEVERIFY
if DBG_SCR {
println("OP_NOP2...")
}
if (ver_flags & VER_CLTV) == 0 {
break // Just do NOP2
}
if DBG_SCR {
println("OP_CHECKLOCKTIMEVERIFY...")
}
if stack.size() < 1 {
if DBG_ERR {
fmt.Println("OP_CHECKLOCKTIMEVERIFY: Stack too short")
}
return false
}
d := stack.top(-1)
if len(d) > 5 {
if DBG_ERR {
fmt.Println("OP_CHECKLOCKTIMEVERIFY: locktime field too long", len(d))
}
return false
}
if DBG_SCR {
fmt.Println("val from stack", hex.EncodeToString(d))
}
locktime := bts2int_ext(d, 5, checkMinVals)
if locktime < 0 {
if DBG_ERR {
fmt.Println("OP_CHECKLOCKTIMEVERIFY: negative locktime")
}
return false
}
if !((tx.Lock_time < LOCKTIME_THRESHOLD && locktime < LOCKTIME_THRESHOLD) ||
(tx.Lock_time >= LOCKTIME_THRESHOLD && locktime >= LOCKTIME_THRESHOLD)) {
if DBG_ERR {
fmt.Println("OP_CHECKLOCKTIMEVERIFY: broken lock value")
}
return false
}
if DBG_SCR {
println("locktime > int64(tx.Lock_time)", locktime, int64(tx.Lock_time))
println(" ... seq", len(tx.TxIn), inp, tx.TxIn[inp].Sequence)
}
// Actually compare the specified lock time with the transaction.
if locktime > int64(tx.Lock_time) {
if DBG_ERR {
fmt.Println("OP_CHECKLOCKTIMEVERIFY: Locktime requirement not satisfied")
}
return false
}
if tx.TxIn[inp].Sequence == 0xffffffff {
if DBG_ERR {
fmt.Println("OP_CHECKLOCKTIMEVERIFY: TxIn final")
}
return false
}
// OP_CHECKLOCKTIMEVERIFY passed successfully
case opcode >= 0xb0 || opcode >= 0xb2 && opcode <= 0xb9: //OP_NOP1 || OP_NOP3..OP_NOP10
// just do nothing
default:
if DBG_ERR {
fmt.Printf("Unhandled opcode 0x%02x - a handler must be implemented\n", opcode)
stack.print()
fmt.Println("Rest of the script:", hex.EncodeToString(p[idx:]))
}
return false
}
}
if DBG_SCR {
fmt.Printf("Finished Executing opcode 0x%02x\n", opcode)
stack.print()
}
if stack.size()+altstack.size() > 1000 {
if DBG_ERR {
fmt.Println("Stack too big")
}
return false
}
}
if DBG_SCR {
fmt.Println("END OF SCRIPT")
stack.print()
}
if exestack.size() > 0 {
if DBG_ERR {
fmt.Println("Unfinished if..")
}
return false
}
return true
}
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
tx := new(btc.Tx)
tx.Version = 1
tx.Lock_time = 0
seq, er := strconv.ParseInt(r.Form["tx_seq"][0], 10, 64)
if er != nil || seq < -2 || seq > 0xffffffff {
err = "Incorrect Sequence value: " + r.Form["tx_seq"][0]
goto error
}
outcnt, _ := strconv.ParseUint(r.Form["outcnt"][0], 10, 32)
lck := new(usif.OneLock)
lck.In.Add(1)
lck.Out.Add(1)
usif.LocksChan <- lck
lck.In.Wait()
defer lck.Out.Done()
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)}
if res, er := common.BlockChain.Unspent.UnspentGet(&po); er == nil {
addr := btc.NewAddrFromPkScript(res.Pk_script, common.Testnet)
unsp := &chain.OneUnspentTx{TxPrevOut: po, Value: res.Value,
MinedAt: res.BlockHeight, Coinbase: res.WasCoinbase, BtcAddr: addr}
thisbal = append(thisbal, unsp)
// Add the input to our tx
tin := new(btc.TxIn)
tin.Input = po
tin.Sequence = uint32(seq)
tx.TxIn = append(tx.TxIn, tin)
// Add the value to total input value
totalinput += res.Value
// If no change specified, use the first input addr as it
if change_addr == nil {
change_addr = addr
}
}
}
}
}
}
if change_addr == nil {
// There werte no inputs
return
}
//wallet.BalanceMutex.Lock()
//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
}
}
}
if pay_cmd == "" {
err = "No inputs selected"
goto error
}
pay_cmd += fmt.Sprint(" -seq ", seq)
am, er := btc.StringToSatoshis(r.Form["txfee"][0])
if er != nil {
err = "Incorrect fee value: " + r.Form["txfee"][0]
goto error
}
pay_cmd += " -fee " + r.Form["txfee"][0]
spentsofar += am
if len(r.Form["change"][0]) > 1 {
addr, er := btc.NewAddrFromString(r.Form["change"][0])
if er != nil {
err = "Incorrect change address: " + r.Form["change"][0]
goto error
}
change_addr = addr
}
pay_cmd += " -change " + change_addr.String()
if totalinput > spentsofar {
// Add change output
outs, er := btc.NewSpendOutputs(change_addr, totalinput-spentsofar, common.CFG.Testnet)
if er != nil {
err = er.Error()
goto error
}
tx.TxOut = append(tx.TxOut, outs...)
}
buf := new(bytes.Buffer)
zi := zip.NewWriter(buf)
was_tx := make(map[[32]byte]bool, len(thisbal))
for i := range thisbal {
if was_tx[thisbal[i].TxPrevOut.Hash] {
continue
}
was_tx[thisbal[i].TxPrevOut.Hash] = true
txid := btc.NewUint256(thisbal[i].TxPrevOut.Hash[:])
fz, _ := zi.Create("balance/" + txid.String() + ".tx")
if dat, er := common.BlockChain.GetRawTx(thisbal[i].MinedAt, txid); er == nil {
fz.Write(dat)
} else {
println(er.Error())
}
}
fz, _ := zi.Create("balance/unspent.txt")
for i := range thisbal {
fmt.Fprintln(fz, thisbal[i].UnspentTextLine())
}
if pay_cmd != "" {
fz, _ = zi.Create(common.CFG.WebUI.PayCommandName)
fz.Write([]byte(pay_cmd))
}
// Non-multisig transaction ...
fz, _ = zi.Create("tx2sign.txt")
fz.Write([]byte(hex.EncodeToString(tx.Serialize())))
zi.Close()
w.Header()["Content-Type"] = []string{"application/zip"}
w.Write(buf.Bytes())
return
} else {
err = "Bad request"
}
error:
s := load_template("send_error.html")
write_html_head(w, r)
s = strings.Replace(s, "<!--ERROR_MSG-->", err, 1)
w.Write([]byte(s))
write_html_tail(w)
}
// Download (and re-assemble) raw transaction from blockexplorer.com
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 {
am, er := btc.StringToSatoshis(txx.Out[i].Value)
if er != nil {
fmt.Println("Incorrect BTC amount", txx.Out[i].Value, er.Error())
return nil, nil
}
tx.TxOut[i] = new(btc.TxOut)
tx.TxOut[i].Value = am
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
}