public async Task <ByteString> IssueWithdrawal(IList <OutboundTransaction> transactions)
{
HttpClient client = new HttpClient();
BitcoinAddress address = storageKey.ScriptPubKey.GetDestinationAddress(this.Network);
HttpResponseMessage response = await client.GetAsync(new Uri(url, $"addresses/{address.ToString()}/unspents"));
string body = await response.Content.ReadAsStringAsync();
JArray outputs = JArray.Parse(body);
TransactionBuilder builder = new TransactionBuilder();
builder.AddKeys(storageKey.GetBitcoinSecret(Network));
foreach (JObject output in outputs)
{
string transactionHash = (string)output["transaction_hash"];
uint outputIndex = (uint)output["output_index"];
long amount = (long)output["value"];
builder.AddCoins(new Coin(uint256.Parse(transactionHash), outputIndex, new Money(amount), storageKey.ScriptPubKey));
}
foreach (OutboundTransaction outboundTransaction in transactions)
{
builder.Send(BitcoinAddress.Create(outboundTransaction.Target, Network).ScriptPubKey, new Money(outboundTransaction.Amount));
}
builder.SendFees(defaultFees);
builder.SetChange(storageKey.ScriptPubKey, ChangeType.All);
NBitcoin.Transaction transaction = builder.BuildTransaction(true);
return(new ByteString(transaction.ToBytes()));
}
public static bool VerifyScriptConsensus(Script scriptPubKey, Transaction tx, uint nIn, Money amount, ScriptVerify flags, out BitcoinConsensusError err)
{
var scriptPubKeyBytes = scriptPubKey.ToBytes();
var txToBytes = tx.ToBytes();
err = BitcoinConsensusError.ERR_OK;
var valid = VerifyScriptConsensusWithAmount(scriptPubKeyBytes, (uint)scriptPubKeyBytes.Length, amount.Satoshi, txToBytes, (uint)txToBytes.Length, nIn, flags, ref err);
return valid == 1;
}
public static bool VerifyScriptConsensus(Script scriptPubKey, Transaction tx, uint nIn, ScriptVerify flags)
{
var scriptPubKeyBytes = scriptPubKey.ToBytes();
var txToBytes = tx.ToBytes();
var err = BitcoinConsensusError.ERR_OK;
var valid = VerifyScriptConsensus(scriptPubKeyBytes, (uint)scriptPubKeyBytes.Length, txToBytes, (uint)txToBytes.Length, nIn, flags, ref err);
return(valid == 1);
}
public void Serialize(BitcoinStream stream)
{
if (stream == null)
{
throw new ArgumentNullException(nameof(stream));
}
// Write the utxo
// If there is a non-witness utxo, then don't serialize the witness one.
if (witness_utxo != null)
{
// key
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_WITNESS_UTXO;
stream.ReadWrite(ref key);
// value
var data = witness_utxo.ToBytes();
stream.ReadWriteAsVarString(ref data);
}
if (non_witness_utxo != null)
{
// key
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_NON_WITNESS_UTXO;
stream.ReadWrite(ref key);
// value
byte[] data = non_witness_utxo.ToBytes();
stream.ReadWriteAsVarString(ref data);
}
// Write the sighash type
if (sighash_type > 0)
{
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_SIGHASH;
stream.ReadWrite(ref key);
var tmp = Utils.ToBytes((uint)sighash_type, true);
stream.ReadWriteAsVarString(ref tmp);
}
// Write the redeem script
if (redeem_script != null)
{
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_REDEEMSCRIPT;
stream.ReadWrite(ref key);
var value = redeem_script.ToBytes();
stream.ReadWriteAsVarString(ref value);
}
// Write the witness script
if (witness_script != null)
{
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_WITNESSSCRIPT;
stream.ReadWrite(ref key);
var value = witness_script.ToBytes();
stream.ReadWriteAsVarString(ref value);
}
// Write any partial signatures
foreach (var sig_pair in partial_sigs)
{
var key = new byte[] { PSBTConstants.PSBT_IN_PARTIAL_SIG }.Concat(sig_pair.Key.ToBytes());
stream.ReadWriteAsVarString(ref key);
var sig = sig_pair.Value.ToBytes();
stream.ReadWriteAsVarString(ref sig);
}
// Write any hd keypaths
foreach (var pathPair in hd_keypaths)
{
var key = new byte[] { PSBTConstants.PSBT_IN_BIP32_DERIVATION }.Concat(pathPair.Key.ToBytes());
stream.ReadWriteAsVarString(ref key);
var masterFingerPrint = pathPair.Value.MasterFingerprint;
var path = pathPair.Value.KeyPath.ToBytes();
var pathInfo = masterFingerPrint.ToBytes().Concat(path);
stream.ReadWriteAsVarString(ref pathInfo);
}
// Write script sig
if (final_script_sig != null)
{
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_SCRIPTSIG;
stream.ReadWrite(ref key);
byte[] value = final_script_sig.ToBytes();
stream.ReadWriteAsVarString(ref value);
}
// write script witness
if (final_script_witness != null)
{
stream.ReadWriteAsVarInt(ref defaultKeyLen);
var key = PSBTConstants.PSBT_IN_SCRIPTWITNESS;
stream.ReadWrite(ref key);
var stack = final_script_witness.ToBytes();
stream.ReadWriteAsVarString(ref stack);
}
// Write unknown things
foreach (var entry in unknown)
{
var k = entry.Key;
var v = entry.Value;
stream.ReadWriteAsVarString(ref k);
stream.ReadWriteAsVarString(ref v);
}
var sep = PSBTConstants.PSBT_SEPARATOR;
stream.ReadWrite(ref sep);
}
//struct GetRejectReason() { return strRejectReason; }
public bool CheckTransaction(Transaction tx)
{
// Basic checks that don't depend on any context
if(tx.Inputs.Count == 0)
return DoS(10, Utils.error("CheckTransaction() : vin empty"),
RejectCode.INVALID, "bad-txns-vin-empty");
if(tx.Outputs.Count == 0)
return DoS(10, Utils.error("CheckTransaction() : vout empty"),
RejectCode.INVALID, "bad-txns-vout-empty");
// Size limits
if(tx.ToBytes().Length > MAX_BLOCK_SIZE)
return DoS(100, Utils.error("CheckTransaction() : size limits failed"),
RejectCode.INVALID, "bad-txns-oversize");
// Check for negative or overflow output values
long nValueOut = 0;
foreach(var txout in tx.Outputs)
{
if(txout.Value < 0)
return DoS(100, Utils.error("CheckTransaction() : txout.nValue negative"),
RejectCode.INVALID, "bad-txns-vout-negative");
if(txout.Value > MAX_MONEY)
return DoS(100, Utils.error("CheckTransaction() : txout.nValue too high"),
RejectCode.INVALID, "bad-txns-vout-toolarge");
nValueOut += (long)txout.Value;
if(!((nValueOut >= 0 && nValueOut <= (long)MAX_MONEY)))
return DoS(100, Utils.error("CheckTransaction() : txout total out of range"),
RejectCode.INVALID, "bad-txns-txouttotal-toolarge");
}
// Check for duplicate inputs
HashSet<OutPoint> vInOutPoints = new HashSet<OutPoint>();
foreach(var txin in tx.Inputs)
{
if(vInOutPoints.Contains(txin.PrevOut))
return DoS(100, Utils.error("CheckTransaction() : duplicate inputs"),
RejectCode.INVALID, "bad-txns-inputs-duplicate");
vInOutPoints.Add(txin.PrevOut);
}
if(tx.IsCoinBase)
{
if(tx.Inputs[0].ScriptSig.Length < 2 || tx.Inputs[0].ScriptSig.Length > 100)
return DoS(100, Utils.error("CheckTransaction() : coinbase script size"),
RejectCode.INVALID, "bad-cb-length");
}
else
{
foreach(var txin in tx.Inputs)
if(txin.PrevOut.IsNull)
return DoS(10, Utils.error("CheckTransaction() : prevout is null"),
RejectCode.INVALID, "bad-txns-prevout-null");
}
return true;
}
public static bool VerifyScriptConsensus(Script scriptPubKey, Transaction tx, uint nIn, ScriptVerify flags)
{
var scriptPubKeyBytes = scriptPubKey.ToBytes();
var txToBytes = tx.ToBytes();
var err = BitcoinConsensusError.ERR_OK;
var valid = VerifyScriptConsensus(scriptPubKeyBytes, (uint)scriptPubKeyBytes.Length, txToBytes, (uint)txToBytes.Length, nIn, flags, ref err);
return valid == 1;
}
//https://en.bitcoin.it/wiki/OP_CHECKSIG
public uint256 SignatureHash(Transaction txTo, int nIn, SigHash nHashType)
{
if(nIn >= txTo.Inputs.Count)
{
Utils.log("ERROR: SignatureHash() : nIn=" + nIn + " out of range\n");
return uint256.One;
}
// Check for invalid use of SIGHASH_SINGLE
if(nHashType == SigHash.Single)
{
if(nIn >= txTo.Outputs.Count)
{
Utils.log("ERROR: SignatureHash() : nOut=" + nIn + " out of range\n");
return uint256.One;
}
}
var scriptCopy = new Script(_Script);
scriptCopy.FindAndDelete(OpcodeType.OP_CODESEPARATOR);
var txCopy = new Transaction(txTo.ToBytes());
//Set all TxIn script to empty string
foreach(var txin in txCopy.Inputs)
{
txin.ScriptSig = new Script();
}
//Copy subscript into the txin script you are checking
txCopy.Inputs[nIn].ScriptSig = scriptCopy;
var hashType = nHashType & (SigHash)31;
if(hashType == SigHash.None)
{
//The output of txCopy is set to a vector of zero size.
txCopy.Outputs.Clear();
//All other inputs aside from the current input in txCopy have their nSequence index set to zero
foreach(var input in txCopy.Inputs.Where((x, i) => i != nIn))
input.Sequence = 0;
}
else if(hashType == SigHash.Single)
{
//The output of txCopy is resized to the size of the current input index+1.
txCopy.Outputs.RemoveRange(nIn + 1, txCopy.Outputs.Count - (nIn + 1));
//All other txCopy outputs aside from the output that is the same as the current input index are set to a blank script and a value of (long) -1.
for(var i = 0 ; i < txCopy.Outputs.Count ; i++)
{
if(i == nIn)
continue;
txCopy.Outputs[i] = new TxOut();
}
//All other txCopy inputs aside from the current input are set to have an nSequence index of zero.
foreach(var input in txCopy.Inputs.Where((x, i) => i != nIn))
input.Sequence = 0;
}
if((nHashType & SigHash.AnyoneCanPay) != 0)
{
//The txCopy input vector is resized to a length of one.
var script = txCopy.Inputs[nIn];
txCopy.Inputs.Clear();
txCopy.Inputs.Add(script);
//The subScript (lead in by its length as a var-integer encoded!) is set as the first and only member of this vector.
txCopy.Inputs[0].ScriptSig = scriptCopy;
}
//Serialize TxCopy, append 4 byte hashtypecode
var ms = new MemoryStream();
var bitcoinStream = new BitcoinStream(ms, true);
txCopy.ReadWrite(bitcoinStream);
bitcoinStream.ReadWrite((uint)nHashType);
var hashed = ms.ToArray();
return Hashes.Hash256(hashed);
}
//https://en.bitcoin.it/wiki/OP_CHECKSIG
public static uint256 SignatureHash(Script scriptCode, Transaction txTo, int nIn, SigHash nHashType, Money amount, HashVersion sigversion, PrecomputedTransactionData precomputedTransactionData)
{
if (sigversion == HashVersion.Witness)
{
if (amount == null)
{
throw new ArgumentException("The amount of the output being signed must be provided", "amount");
}
uint256 hashPrevouts = uint256.Zero;
uint256 hashSequence = uint256.Zero;
uint256 hashOutputs = uint256.Zero;
if ((nHashType & SigHash.AnyoneCanPay) == 0)
{
hashPrevouts = precomputedTransactionData == null?
GetHashPrevouts(txTo) : precomputedTransactionData.HashPrevouts;
}
if ((nHashType & SigHash.AnyoneCanPay) == 0 && ((uint)nHashType & 0x1f) != (uint)SigHash.Single && ((uint)nHashType & 0x1f) != (uint)SigHash.None)
{
hashSequence = precomputedTransactionData == null?
GetHashSequence(txTo) : precomputedTransactionData.HashSequence;
}
if (((uint)nHashType & 0x1f) != (uint)SigHash.Single && ((uint)nHashType & 0x1f) != (uint)SigHash.None)
{
hashOutputs = precomputedTransactionData == null?
GetHashOutputs(txTo) : precomputedTransactionData.HashOutputs;
}
else if (((uint)nHashType & 0x1f) == (uint)SigHash.Single && nIn < txTo.Outputs.Count)
{
BitcoinStream ss = CreateHashWriter(sigversion);
ss.ReadWrite(txTo.Outputs[nIn]);
hashOutputs = GetHash(ss);
}
BitcoinStream sss = CreateHashWriter(sigversion);
// Version
sss.ReadWrite(txTo.Version);
// Input prevouts/nSequence (none/all, depending on flags)
sss.ReadWrite(hashPrevouts);
sss.ReadWrite(hashSequence);
// The input being signed (replacing the scriptSig with scriptCode + amount)
// The prevout may already be contained in hashPrevout, and the nSequence
// may already be contain in hashSequence.
sss.ReadWrite(txTo.Inputs[nIn].PrevOut);
sss.ReadWrite(scriptCode);
sss.ReadWrite(amount.Satoshi);
sss.ReadWrite((uint)txTo.Inputs[nIn].Sequence);
// Outputs (none/one/all, depending on flags)
sss.ReadWrite(hashOutputs);
// Locktime
sss.ReadWriteStruct(txTo.LockTime);
// Sighash type
sss.ReadWrite((uint)nHashType);
return(GetHash(sss));
}
if (nIn >= txTo.Inputs.Count)
{
Utils.log("ERROR: SignatureHash() : nIn=" + nIn + " out of range\n");
return(uint256.One);
}
// Check for invalid use of SIGHASH_SINGLE
if (nHashType == SigHash.Single)
{
if (nIn >= txTo.Outputs.Count)
{
Utils.log("ERROR: SignatureHash() : nOut=" + nIn + " out of range\n");
return(uint256.One);
}
}
var scriptCopy = new Script(scriptCode._Script);
scriptCopy.FindAndDelete(OpcodeType.OP_CODESEPARATOR);
var txCopy = new Transaction(txTo.ToBytes());
//Set all TxIn script to empty string
foreach (var txin in txCopy.Inputs)
{
txin.ScriptSig = new Script();
}
//Copy subscript into the txin script you are checking
txCopy.Inputs[nIn].ScriptSig = scriptCopy;
var hashType = nHashType & (SigHash)31;
if (hashType == SigHash.None)
{
//The output of txCopy is set to a vector of zero size.
txCopy.Outputs.Clear();
//All other inputs aside from the current input in txCopy have their nSequence index set to zero
foreach (var input in txCopy.Inputs.Where((x, i) => i != nIn))
{
input.Sequence = 0;
}
}
else if (hashType == SigHash.Single)
{
//The output of txCopy is resized to the size of the current input index+1.
txCopy.Outputs.RemoveRange(nIn + 1, txCopy.Outputs.Count - (nIn + 1));
//All other txCopy outputs aside from the output that is the same as the current input index are set to a blank script and a value of (long) -1.
for (var i = 0; i < txCopy.Outputs.Count; i++)
{
if (i == nIn)
{
continue;
}
txCopy.Outputs[i] = new TxOut();
}
//All other txCopy inputs aside from the current input are set to have an nSequence index of zero.
foreach (var input in txCopy.Inputs.Where((x, i) => i != nIn))
{
input.Sequence = 0;
}
}
if ((nHashType & SigHash.AnyoneCanPay) != 0)
{
//The txCopy input vector is resized to a length of one.
var script = txCopy.Inputs[nIn];
txCopy.Inputs.Clear();
txCopy.Inputs.Add(script);
//The subScript (lead in by its length as a var-integer encoded!) is set as the first and only member of this vector.
txCopy.Inputs[0].ScriptSig = scriptCopy;
}
//Serialize TxCopy, append 4 byte hashtypecode
var stream = CreateHashWriter(sigversion);
txCopy.ReadWrite(stream);
stream.ReadWrite((uint)nHashType);
return(GetHash(stream));
}
//https://en.bitcoin.it/wiki/OP_CHECKSIG
public uint256 SignatureHash(Transaction txTo, int nIn, SigHash nHashType)
{
if (nIn >= txTo.Inputs.Count)
{
Utils.log("ERROR: SignatureHash() : nIn=" + nIn + " out of range\n");
return(1);
}
// Check for invalid use of SIGHASH_SINGLE
if (nHashType == SigHash.Single)
{
if (nIn >= txTo.Outputs.Count)
{
Utils.log("ERROR: SignatureHash() : nOut=" + nIn + " out of range\n");
return(1);
}
}
var scriptCopy = new Script(_Script);
scriptCopy.FindAndDelete(OpcodeType.OP_CODESEPARATOR);
var txCopy = new Transaction(txTo.ToBytes());
//Set all TxIn script to empty string
foreach (var txin in txCopy.Inputs)
{
txin.ScriptSig = new Script();
}
//Copy subscript into the txin script you are checking
txCopy.Inputs[nIn].ScriptSig = scriptCopy;
if (((int)nHashType & 31) == (int)SigHash.None)
{
//The output of txCopy is set to a vector of zero size.
txCopy.Outputs.Clear();
//All other inputs aside from the current input in txCopy have their nSequence index set to zero
for (int i = 0; i < txCopy.Inputs.Count; i++)
{
if (i == nIn)
{
continue;
}
txCopy.Inputs[i].Sequence = 0;
}
}
if (((int)nHashType & 31) == (int)SigHash.Single)
{
//The output of txCopy is resized to the size of the current input index+1.
var remainingOut = txCopy.Outputs.Take(nIn + 1).ToArray();
txCopy.Outputs.Clear();
txCopy.Outputs.AddRange(remainingOut);
//All other txCopy outputs aside from the output that is the same as the current input index are set to a blank script and a value of (long) -1.
for (int i = 0; i < txCopy.Outputs.Count; i++)
{
if (i == nIn)
{
continue;
}
txCopy.Outputs[i] = new TxOut();
}
for (int i = 0; i < txCopy.Inputs.Count; i++)
{
//All other txCopy inputs aside from the current input are set to have an nSequence index of zero.
if (i == nIn)
{
continue;
}
txCopy.Inputs[i].Sequence = 0;
}
}
if (((int)nHashType & (int)SigHash.AnyoneCanPay) != 0)
{
//The txCopy input vector is resized to a length of one.
var script = txCopy.Inputs[nIn];
txCopy.Inputs.Clear();
txCopy.Inputs.Add(script);
//The subScript (lead in by its length as a var-integer encoded!) is set as the first and only member of this vector.
txCopy.Inputs[0].ScriptSig = scriptCopy;
}
//Serialize TxCopy, append 4 byte hashtypecode
MemoryStream ms = new MemoryStream();
BitcoinStream bitcoinStream = new BitcoinStream(ms, true);
txCopy.ReadWrite(bitcoinStream);
bitcoinStream.ReadWrite((uint)nHashType);
var hashed = ms.ToArray();
return(Hashes.Hash256(hashed));
}
//https://en.bitcoin.it/wiki/OP_CHECKSIG
public static uint256 SignatureHash(Script scriptCode, Transaction txTo, int nIn, SigHash nHashType, Money amount = null, HashVersion sigversion = HashVersion.Original)
{
if(sigversion == HashVersion.Witness)
{
if(amount == null)
throw new ArgumentException("The amount of the output being signed must be provided", "amount");
uint256 hashPrevouts = uint256.Zero;
uint256 hashSequence = uint256.Zero;
uint256 hashOutputs = uint256.Zero;
if((nHashType & SigHash.AnyoneCanPay) == 0)
{
BitcoinStream ss = CreateHashWriter(sigversion);
foreach(var input in txTo.Inputs)
{
ss.ReadWrite(input.PrevOut);
}
hashPrevouts = GetHash(ss); // TODO: cache this value for all signatures in a transaction
}
if((nHashType & SigHash.AnyoneCanPay) == 0 && ((uint)nHashType & 0x1f) != (uint)SigHash.Single && ((uint)nHashType & 0x1f) != (uint)SigHash.None)
{
BitcoinStream ss = CreateHashWriter(sigversion);
foreach(var input in txTo.Inputs)
{
ss.ReadWrite((uint)input.Sequence);
}
hashSequence = GetHash(ss); // TODO: cache this value for all signatures in a transaction
}
if(((uint)nHashType & 0x1f) != (uint)SigHash.Single && ((uint)nHashType & 0x1f) != (uint)SigHash.None)
{
BitcoinStream ss = CreateHashWriter(sigversion);
foreach(var txout in txTo.Outputs)
{
ss.ReadWrite(txout);
}
hashOutputs = GetHash(ss); // TODO: cache this value for all signatures in a transaction
}
else if(((uint)nHashType & 0x1f) == (uint)SigHash.Single && nIn < txTo.Outputs.Count)
{
BitcoinStream ss = CreateHashWriter(sigversion);
ss.ReadWrite(txTo.Outputs[nIn]);
hashOutputs = GetHash(ss);
}
BitcoinStream sss = CreateHashWriter(sigversion);
// Version
sss.ReadWrite(txTo.Version);
// Input prevouts/nSequence (none/all, depending on flags)
sss.ReadWrite(hashPrevouts);
sss.ReadWrite(hashSequence);
// The input being signed (replacing the scriptSig with scriptCode + amount)
// The prevout may already be contained in hashPrevout, and the nSequence
// may already be contain in hashSequence.
sss.ReadWrite(txTo.Inputs[nIn].PrevOut);
sss.ReadWrite(scriptCode);
sss.ReadWrite(amount.Satoshi);
sss.ReadWrite((uint)txTo.Inputs[nIn].Sequence);
// Outputs (none/one/all, depending on flags)
sss.ReadWrite(hashOutputs);
// Locktime
sss.ReadWriteStruct(txTo.LockTime);
// Sighash type
sss.ReadWrite((uint)nHashType);
return GetHash(sss);
}
if(nIn >= txTo.Inputs.Count)
{
Utils.log("ERROR: SignatureHash() : nIn=" + nIn + " out of range\n");
return uint256.One;
}
// Check for invalid use of SIGHASH_SINGLE
if(nHashType == SigHash.Single)
{
if(nIn >= txTo.Outputs.Count)
{
Utils.log("ERROR: SignatureHash() : nOut=" + nIn + " out of range\n");
return uint256.One;
}
}
var scriptCopy = new Script(scriptCode._Script);
scriptCopy.FindAndDelete(OpcodeType.OP_CODESEPARATOR);
var txCopy = new Transaction(txTo.ToBytes());
//Set all TxIn script to empty string
foreach(var txin in txCopy.Inputs)
{
txin.ScriptSig = new Script();
}
//Copy subscript into the txin script you are checking
txCopy.Inputs[nIn].ScriptSig = scriptCopy;
var hashType = nHashType & (SigHash)31;
if(hashType == SigHash.None)
{
//The output of txCopy is set to a vector of zero size.
txCopy.Outputs.Clear();
//All other inputs aside from the current input in txCopy have their nSequence index set to zero
foreach(var input in txCopy.Inputs.Where((x, i) => i != nIn))
input.Sequence = 0;
}
else if(hashType == SigHash.Single)
{
//The output of txCopy is resized to the size of the current input index+1.
txCopy.Outputs.RemoveRange(nIn + 1, txCopy.Outputs.Count - (nIn + 1));
//All other txCopy outputs aside from the output that is the same as the current input index are set to a blank script and a value of (long) -1.
for(var i = 0 ; i < txCopy.Outputs.Count ; i++)
{
if(i == nIn)
continue;
txCopy.Outputs[i] = new TxOut();
}
//All other txCopy inputs aside from the current input are set to have an nSequence index of zero.
foreach(var input in txCopy.Inputs.Where((x, i) => i != nIn))
input.Sequence = 0;
}
if((nHashType & SigHash.AnyoneCanPay) != 0)
{
//The txCopy input vector is resized to a length of one.
var script = txCopy.Inputs[nIn];
txCopy.Inputs.Clear();
txCopy.Inputs.Add(script);
//The subScript (lead in by its length as a var-integer encoded!) is set as the first and only member of this vector.
txCopy.Inputs[0].ScriptSig = scriptCopy;
}
//Serialize TxCopy, append 4 byte hashtypecode
var stream = CreateHashWriter(sigversion);
txCopy.ReadWrite(stream);
stream.ReadWrite((uint)nHashType);
return GetHash(stream);
}
//struct GetRejectReason() { return strRejectReason; }
public bool CheckTransaction(Transaction tx)
{
// Basic checks that don't depend on any context
if (tx.Inputs.Count == 0)
{
return(DoS(10, Utils.error("CheckTransaction() : vin empty"),
RejectCode.INVALID, "bad-txns-vin-empty"));
}
if (tx.Outputs.Count == 0)
{
return(DoS(10, Utils.error("CheckTransaction() : vout empty"),
RejectCode.INVALID, "bad-txns-vout-empty"));
}
// Size limits
if (tx.ToBytes().Length > MAX_BLOCK_SIZE)
{
return(DoS(100, Utils.error("CheckTransaction() : size limits failed"),
RejectCode.INVALID, "bad-txns-oversize"));
}
// Check for negative or overflow output values
long nValueOut = 0;
foreach (var txout in tx.Outputs)
{
if (txout.Value < 0)
{
return(DoS(100, Utils.error("CheckTransaction() : txout.nValue negative"),
RejectCode.INVALID, "bad-txns-vout-negative"));
}
if (txout.Value > MAX_MONEY)
{
return(DoS(100, Utils.error("CheckTransaction() : txout.nValue too high"),
RejectCode.INVALID, "bad-txns-vout-toolarge"));
}
nValueOut += (long)txout.Value;
if (!((nValueOut >= 0 && nValueOut <= (long)MAX_MONEY)))
{
return(DoS(100, Utils.error("CheckTransaction() : txout total out of range"),
RejectCode.INVALID, "bad-txns-txouttotal-toolarge"));
}
}
// Check for duplicate inputs
HashSet <OutPoint> vInOutPoints = new HashSet <OutPoint>();
foreach (var txin in tx.Inputs)
{
if (vInOutPoints.Contains(txin.PrevOut))
{
return(DoS(100, Utils.error("CheckTransaction() : duplicate inputs"),
RejectCode.INVALID, "bad-txns-inputs-duplicate"));
}
vInOutPoints.Add(txin.PrevOut);
}
if (tx.IsCoinBase)
{
if (tx.Inputs[0].ScriptSig.Length < 2 || tx.Inputs[0].ScriptSig.Length > 100)
{
return(DoS(100, Utils.error("CheckTransaction() : coinbase script size"),
RejectCode.INVALID, "bad-cb-length"));
}
}
else
{
foreach (var txin in tx.Inputs)
{
if (txin.PrevOut.IsNull)
{
return(DoS(10, Utils.error("CheckTransaction() : prevout is null"),
RejectCode.INVALID, "bad-txns-prevout-null"));
}
}
}
return(true);
}
