2 * Novacoin classes library
3 * Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU Affero General Public License as
7 * published by the Free Software Foundation, either version 3 of the
8 * License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Affero General Public License for more details.
15 * You should have received a copy of the GNU Affero General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 using System.Collections.Generic;
26 /// Represents the transaction. Any transaction must provide one input and one output at least.
28 public class CTransaction
31 /// Version of transaction schema.
33 public uint nVersion = 1;
36 /// Transaction timestamp.
38 public uint nTime = 0;
41 /// Array of transaction inputs
46 /// Array of transaction outputs
51 /// Block height or timestamp when transaction is final
53 public uint nLockTime = 0;
56 /// Initialize an empty instance
60 // Initialize empty input and output arrays. Please note that such
61 // configuration is not valid for real transaction, you have to supply
62 // at least one input and one output.
68 /// Initialize new instance as a copy of another transaction
70 /// <param name="tx">Transaction to copy from</param>
71 public CTransaction(CTransaction tx)
73 nVersion = tx.nVersion;
76 vin = new CTxIn[tx.vin.Length];
78 for (int i = 0; i < vin.Length; i++)
80 vin[i] = new CTxIn(tx.vin[i]);
83 vout = new CTxOut[tx.vout.Length];
85 for (int i = 0; i < vout.Length; i++)
87 vout[i] = new CTxOut(tx.vout[i]);
90 nLockTime = tx.nLockTime;
95 /// Parse byte sequence and initialize new instance of CTransaction
97 /// <param name="txBytes">Byte sequence</param>
98 public CTransaction(IList<byte> txBytes)
100 ByteQueue wBytes = new ByteQueue(txBytes);
102 nVersion = BitConverter.ToUInt32(wBytes.Get(4), 0);
103 nTime = BitConverter.ToUInt32(wBytes.Get(4), 0);
105 int nInputs = (int)(int)wBytes.GetVarInt();
106 vin = new CTxIn[nInputs];
108 for (int nCurrentInput = 0; nCurrentInput < nInputs; nCurrentInput++)
111 vin[nCurrentInput] = new CTxIn();
113 vin[nCurrentInput].prevout = new COutPoint(wBytes.Get(36));
115 int nScriptSigLen = (int)wBytes.GetVarInt();
116 vin[nCurrentInput].scriptSig = new CScript(wBytes.Get(nScriptSigLen));
118 vin[nCurrentInput].nSequence = BitConverter.ToUInt32(wBytes.Get(4), 0);
121 int nOutputs = (int)wBytes.GetVarInt();
122 vout = new CTxOut[nOutputs];
124 for (int nCurrentOutput = 0; nCurrentOutput < nOutputs; nCurrentOutput++)
126 // Fill outputs array
127 vout[nCurrentOutput] = new CTxOut();
128 vout[nCurrentOutput].nValue = BitConverter.ToInt64(wBytes.Get(8), 0);
130 int nScriptPKLen = (int)wBytes.GetVarInt();
131 vout[nCurrentOutput].scriptPubKey = new CScript(wBytes.Get(nScriptPKLen));
134 nLockTime = BitConverter.ToUInt32(wBytes.Get(4), 0);
138 /// Read transactions array which is encoded in the block body.
140 /// <param name="wTxBytes">Bytes sequence</param>
141 /// <returns>Transactions array</returns>
142 public static CTransaction[] ReadTransactionsList(ref ByteQueue wTxBytes)
146 // Read amount of transactions
147 int nTransactions = (int)wTxBytes.GetVarInt();
148 tx = new CTransaction[nTransactions];
150 for (int nTx = 0; nTx < nTransactions; nTx++)
152 // Fill the transactions array
153 tx[nTx] = new CTransaction();
155 tx[nTx].nVersion = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
156 tx[nTx].nTime = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
159 tx[nTx].vin = CTxIn.ReadTxInList(ref wTxBytes);
162 tx[nTx].vout = CTxOut.ReadTxOutList(ref wTxBytes);
164 tx[nTx].nLockTime = BitConverter.ToUInt32(wTxBytes.Get(4), 0);
170 public bool IsCoinBase
172 get { return (vin.Length == 1 && vin[0].prevout.IsNull && vout.Length >= 1); }
175 public bool IsCoinStake
179 return (vin.Length > 0 && (!vin[0].prevout.IsNull) && vout.Length >= 2 && vout[0].IsEmpty);
188 get { return Hash256.Compute256(Bytes); }
192 /// A sequence of bytes, which corresponds to the current state of CTransaction.
194 public IList<byte> Bytes
198 List<byte> resultBytes = new List<byte>();
200 // Typical transaction example:
202 // 01000000 -- version
203 // 78b4c953 -- timestamp
204 // 06 -- amount of txins
205 // 340d96b77ec4ee9d42b31cadc2fab911e48d48c36274d516f226d5e85bbc512c -- txin hash
206 // 01000000 -- txin outnumber
207 // 6b -- txin scriptSig length
208 // 483045022100c8df1fc17b6ea1355a39b92146ec67b3b53565e636e028010d3a8a87f6f805f202203888b9b74df03c3960773f2a81b2dfd1efb08bb036a8f3600bd24d5ed694cd5a0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
209 // ffffffff -- txin nSequence
210 // 364c640420de8fa77313475970bf09ce4d0b1f8eabb8f1d6ea49d90c85b202ee -- txin hash
211 // 01000000 -- txin outnumber
212 // 6b -- txin scriptSig length
213 // 483045022100b651bf3a6835d714d2c990c742136d769258d0170c9aac24803b986050a8655b0220623651077ff14b0a9d61e30e30f2c15352f70491096f0ec655ae1c79a44e53aa0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
214 // ffffffff -- txin nSequence
215 // 7adbd5f2e521f567bfea2cb63e65d55e66c83563fe253464b75184a5e462043d -- txin hash
216 // 00000000 -- txin outnumber
217 // 6a -- txin scriptSig length
218 // 4730440220183609f2b995993acc9df241aff722d48b9a731b0cd376212934565723ed81f00220737e7ce75ef39bdc061d0dcdba3ee24e43b899696a7c96803cee0a79e1f78ecb0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
219 // ffffffff -- txin nSequence
220 // 999eb03e00a41c2f9fde8865a554ceebbc48d30f4c8ba22dd88da8c9b46fa920 -- txin hash
221 // 03000000 -- txin outnumber
222 // 6b -- txin scriptSig length
223 // 483045022100ec1ab104ef086ba79b0f2611ebf1bfdd22a7a1020f6630fa1c6707546626e0db022056093d4048a999392185ccc735ef736a5497bd68f60b42e6c0c93ba770b54d010121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
224 // ffffffff -- txin nSequence
225 // c0543b86be257ddd85b014a76718a70fab9eaa3c477460e4ca187094d86f369c -- txin hash
226 // 05000000 -- txin outnumber
227 // 69 -- txin scriptSig length
228 // 463043021f24275c72f952043174daf01d7f713f878625f0522124a3cab48a0a2e12604202201b47742e6697b0ebdd1e4ba49c74baf142a0228ad0e0ee847488994c9dce78470121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
229 // ffffffff -- txin nSequence
230 // e1793d4519147782293dd1db6d90e461265d91db2cc6889c37209394d42ad10d -- txin hash
231 // 05000000 -- txin outnumber
232 // 6a -- txin scriptSig length
233 // 473044022018a0c3d73b2765d75380614ab36ee8e3c937080894a19166128b1e3357b208fb0220233c9609985f535547381431526867ad0255ec4969afe5c360544992ed6b3ed60121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
234 // ffffffff -- txin nSequence
235 // 02 -- amount of txouts
236 // e542000000000000 -- txout value
237 // 19 -- scriptPubKey length
238 // 76a91457d84c814b14bd86bf32f106b733baa693db7dc788ac -- scriptPubKey
239 // 409c000000000000 -- txout value
240 // 19 -- scriptPubKey length
241 // 76a91408c8768d5d6bf7c1d9609da4e766c3f1752247b188ac -- scriptPubKey
242 // 00000000 -- lock time
244 resultBytes.AddRange(BitConverter.GetBytes(nVersion));
245 resultBytes.AddRange(BitConverter.GetBytes(nTime));
246 resultBytes.AddRange(VarInt.EncodeVarInt(vin.LongLength));
248 foreach (CTxIn input in vin)
250 resultBytes.AddRange(input.Bytes);
253 resultBytes.AddRange(VarInt.EncodeVarInt(vout.LongLength));
255 foreach (CTxOut output in vout)
257 resultBytes.AddRange(output.Bytes);
260 resultBytes.AddRange(BitConverter.GetBytes(nLockTime));
266 public override string ToString()
268 StringBuilder sb = new StringBuilder();
270 sb.AppendFormat("CTransaction(\n nVersion={0},\n nTime={1},\n", nVersion, nTime);
272 foreach (CTxIn txin in vin)
274 sb.AppendFormat(" {0},\n", txin.ToString());
277 foreach (CTxOut txout in vout)
279 sb.AppendFormat(" {0},\n", txout.ToString());
282 sb.AppendFormat("\nnLockTime={0}\n)", nLockTime);
284 return sb.ToString();