func DecodeTx(tx *btc.Tx) (s string, missinginp bool, totinp, totout uint64, e error) {
s += fmt.Sprintln("Transaction details (for your information):")
s += fmt.Sprintln(len(tx.TxIn), "Input(s):")
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(tx.TxIn[i].ScriptSig, po.Pk_script, i, tx, script.VER_P2SH|script.VER_DERSIG)
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\n", float64(po.Value)/1e8, ads)
} 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)
}
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>"))
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>"))
}
// This isusually the most time consuming process when applying a new block
func (ch *Chain) commitTxs(bl *btc.Block, changes *BlockChanges) (e error) {
sumblockin := btc.GetBlockReward(changes.Height)
var txoutsum, txinsum, sumblockout uint64
if int(changes.Height)+UnwindBufferMaxHistory >= int(changes.LastKnownHeight) {
changes.UndoData = make(map[[32]byte]*QdbRec)
}
// Add each tx outs from the current block to the temporary pool
blUnsp := make(map[[32]byte][]*btc.TxOut, 4*len(bl.Txs))
for i := range bl.Txs {
outs := make([]*btc.TxOut, len(bl.Txs[i].TxOut))
copy(outs, bl.Txs[i].TxOut)
blUnsp[bl.Txs[i].Hash.Hash] = outs
}
// create a channnel to receive results from VerifyScript threads:
done := make(chan bool, sys.UseThreads)
for i := range bl.Txs {
txoutsum, txinsum = 0, 0
// Check each tx for a valid input, except from the first one
if i > 0 {
tx_trusted := bl.Trusted
if !tx_trusted && TrustedTxChecker != nil && TrustedTxChecker(bl.Txs[i].Hash) {
tx_trusted = true
}
scripts_ok := true
for j := 0; j < sys.UseThreads; j++ {
done <- true
}
for j := 0; j < len(bl.Txs[i].TxIn); /*&& e==nil*/ j++ {
inp := &bl.Txs[i].TxIn[j].Input
spendrec, waspent := changes.DeledTxs[inp.Hash]
if waspent && spendrec[inp.Vout] {
println("txin", inp.String(), "already spent in this block")
e = errors.New("Input spent more then once in same block")
break
}
tout := ch.PickUnspent(inp)
if tout == nil {
t, ok := blUnsp[inp.Hash]
if !ok {
e = errors.New("Unknown input TxID: " + btc.NewUint256(inp.Hash[:]).String())
break
}
if inp.Vout >= uint32(len(t)) {
println("Vout too big", len(t), inp.String())
e = errors.New("Vout too big")
break
}
if t[inp.Vout] == nil {
println("Vout already spent", inp.String())
e = errors.New("Vout already spent")
break
}
if t[inp.Vout].WasCoinbase {
e = errors.New("Cannot spend block's own coinbase in TxID: " + btc.NewUint256(inp.Hash[:]).String())
break
}
tout = t[inp.Vout]
t[inp.Vout] = nil // and now mark it as spent:
} else {
if tout.WasCoinbase && changes.Height-tout.BlockHeight < COINBASE_MATURITY {
e = errors.New("Trying to spend prematured coinbase: " + btc.NewUint256(inp.Hash[:]).String())
break
}
// it is confirmed already so delete it later
if !waspent {
spendrec = make([]bool, tout.VoutCount)
changes.DeledTxs[inp.Hash] = spendrec
}
spendrec[inp.Vout] = true
if changes.UndoData != nil {
var urec *QdbRec
urec = changes.UndoData[inp.Hash]
if urec == nil {
urec = new(QdbRec)
urec.TxID = inp.Hash
urec.Coinbase = tout.WasCoinbase
urec.InBlock = tout.BlockHeight
urec.Outs = make([]*QdbTxOut, tout.VoutCount)
changes.UndoData[inp.Hash] = urec
}
tmp := new(QdbTxOut)
tmp.Value = tout.Value
tmp.PKScr = make([]byte, len(tout.Pk_script))
copy(tmp.PKScr, tout.Pk_script)
urec.Outs[inp.Vout] = tmp
}
}
if !(<-done) {
println("VerifyScript error 1")
scripts_ok = false
break
}
if tx_trusted {
done <- true
} else {
go func(sig []byte, prv []byte, i int, tx *btc.Tx) {
done <- script.VerifyTxScript(sig, prv, i, tx, bl.VerifyFlags)
}(bl.Txs[i].TxIn[j].ScriptSig, tout.Pk_script, j, bl.Txs[i])
}
txinsum += tout.Value
}
if scripts_ok {
scripts_ok = <-done
}
for j := 1; j < sys.UseThreads; j++ {
if !(<-done) {
println("VerifyScript error 2")
scripts_ok = false
}
}
if len(done) != 0 {
panic("ASSERT: The channel should be empty gere")
}
if !scripts_ok {
return errors.New("VerifyScripts failed")
}
} else {
// For coinbase tx we need to check (like satoshi) whether the script size is between 2 and 100 bytes
// (Previously we made sure in CheckBlock() that this was a coinbase type tx)
if len(bl.Txs[0].TxIn[0].ScriptSig) < 2 || len(bl.Txs[0].TxIn[0].ScriptSig) > 100 {
return errors.New(fmt.Sprint("Coinbase script has a wrong length", len(bl.Txs[0].TxIn[0].ScriptSig)))
}
}
sumblockin += txinsum
for j := range bl.Txs[i].TxOut {
txoutsum += bl.Txs[i].TxOut[j].Value
}
sumblockout += txoutsum
if e != nil {
return // If any input fails, do not continue
}
if i > 0 && txoutsum > txinsum {
return errors.New(fmt.Sprintf("More spent (%.8f) than at the input (%.8f) in TX %s",
float64(txoutsum)/1e8, float64(txinsum)/1e8, bl.Txs[i].Hash.String()))
}
}
if sumblockin < sumblockout {
return errors.New(fmt.Sprintf("Out:%d > In:%d", sumblockout, sumblockin))
}
var rec *QdbRec
for k, v := range blUnsp {
for i := range v {
if v[i] != nil {
if rec == nil {
rec = new(QdbRec)
rec.TxID = k
rec.Coinbase = v[i].WasCoinbase
rec.InBlock = changes.Height
rec.Outs = make([]*QdbTxOut, len(v))
}
rec.Outs[i] = &QdbTxOut{Value: v[i].Value, PKScr: v[i].Pk_script}
}
}
if rec != nil {
changes.AddList = append(changes.AddList, rec)
rec = nil
}
}
return nil
}
// Must be called from the chain's thread
func HandleNetTx(ntx *TxRcvd, retry bool) (accepted bool) {
common.CountSafe("HandleNetTx")
tx := ntx.tx
var totinp, totout uint64
var frommem bool
TxMutex.Lock()
if !retry {
if _, present := TransactionsPending[tx.Hash.BIdx()]; !present {
// It had to be mined in the meantime, so just drop it now
TxMutex.Unlock()
common.CountSafe("TxNotPending")
return
}
delete(TransactionsPending, ntx.tx.Hash.BIdx())
} else {
// In case case of retry, it is on the rejected list,
// ... so remove it now to free any tied WaitingForInputs
deleteRejected(tx.Hash.BIdx())
}
pos := make([]*btc.TxOut, len(tx.TxIn))
spent := make([]uint64, len(tx.TxIn))
// Check if all the inputs exist in the chain
for i := range tx.TxIn {
spent[i] = tx.TxIn[i].Input.UIdx()
if _, ok := SpentOutputs[spent[i]]; ok {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_DOUBLE_SPEND)
TxMutex.Unlock()
common.CountSafe("TxRejectedDoubleSpnd")
return
}
inptx := btc.NewUint256(tx.TxIn[i].Input.Hash[:])
if txinmem, ok := TransactionsToSend[inptx.BIdx()]; common.CFG.TXPool.AllowMemInputs && ok {
if int(tx.TxIn[i].Input.Vout) >= len(txinmem.TxOut) {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_BAD_INPUT)
TxMutex.Unlock()
common.CountSafe("TxRejectedBadInput")
return
}
pos[i] = txinmem.TxOut[tx.TxIn[i].Input.Vout]
common.CountSafe("TxInputInMemory")
frommem = true
} else {
pos[i], _ = common.BlockChain.Unspent.UnspentGet(&tx.TxIn[i].Input)
if pos[i] == nil {
var newone bool
if !common.CFG.TXPool.AllowMemInputs {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_NOT_MINED)
TxMutex.Unlock()
common.CountSafe("TxRejectedMemInput")
return
}
// In this case, let's "save" it for later...
missingid := btc.NewUint256(tx.TxIn[i].Input.Hash[:])
nrtx := RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_NO_TXOU)
if nrtx != nil {
nrtx.Wait4Input = &Wait4Input{missingTx: missingid, TxRcvd: ntx}
// Add to waiting list:
var rec *OneWaitingList
if rec, _ = WaitingForInputs[nrtx.Wait4Input.missingTx.BIdx()]; rec == nil {
rec = new(OneWaitingList)
rec.TxID = nrtx.Wait4Input.missingTx
rec.Ids = make(map[[btc.Uint256IdxLen]byte]time.Time)
newone = true
}
rec.Ids[tx.Hash.BIdx()] = time.Now()
WaitingForInputs[nrtx.Wait4Input.missingTx.BIdx()] = rec
}
TxMutex.Unlock()
if newone {
common.CountSafe("TxRejectedNoInpNew")
} else {
common.CountSafe("TxRejectedNoInpOld")
}
return
}
}
totinp += pos[i].Value
}
// Check if total output value does not exceed total input
minout := uint64(btc.MAX_MONEY)
for i := range tx.TxOut {
if tx.TxOut[i].Value < atomic.LoadUint64(&common.CFG.TXPool.MinVoutValue) {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_DUST)
TxMutex.Unlock()
common.CountSafe("TxRejectedDust")
return
}
if tx.TxOut[i].Value < minout {
minout = tx.TxOut[i].Value
}
totout += tx.TxOut[i].Value
}
if totout > totinp {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_OVERSPEND)
TxMutex.Unlock()
ntx.conn.DoS("TxOverspend")
return
}
// Check for a proper fee
fee := totinp - totout
if fee < (uint64(len(ntx.raw)) * atomic.LoadUint64(&common.CFG.TXPool.FeePerByte)) {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_LOW_FEE)
TxMutex.Unlock()
common.CountSafe("TxRejectedLowFee")
return
}
// Verify scripts
for i := range tx.TxIn {
if !script.VerifyTxScript(tx.TxIn[i].ScriptSig, pos[i].Pk_script, i, tx, script.VER_P2SH|script.VER_DERSIG) {
RejectTx(ntx.tx.Hash, len(ntx.raw), TX_REJECTED_SCRIPT_FAIL)
TxMutex.Unlock()
ntx.conn.DoS("TxScriptFail")
return
}
}
rec := &OneTxToSend{Data: ntx.raw, Spent: spent, Volume: totinp, Fee: fee, Firstseen: time.Now(), Tx: tx, Minout: minout}
TransactionsToSend[tx.Hash.BIdx()] = rec
TransactionsToSendSize += uint64(len(rec.Data))
for i := range spent {
SpentOutputs[spent[i]] = tx.Hash.BIdx()
}
wtg := WaitingForInputs[tx.Hash.BIdx()]
if wtg != nil {
defer RetryWaitingForInput(wtg) // Redo waiting txs when leaving this function
}
TxMutex.Unlock()
common.CountSafe("TxAccepted")
if frommem {
// Gocoin does not route txs that need unconfirmed inputs
rec.Blocked = TX_REJECTED_NOT_MINED
common.CountSafe("TxRouteNotMined")
} else if isRoutable(rec) {
rec.Invsentcnt += NetRouteInv(1, tx.Hash, ntx.conn)
common.CountSafe("TxRouteOK")
}
accepted = true
return
}