COutPoint class, coinbase/coinstake properties
[NovacoinLibrary.git] / Novacoin / CTransaction.cs
1 \feffusing System;
2 using System.Text;
3 using System.Collections.Generic;
4
5 namespace Novacoin
6 {
7     /// <summary>
8     /// Represents the transaction. Any transaction must provide one input and one output at least.
9     /// </summary>
10     public class CTransaction
11     {
12         /// <summary>
13         /// Version of transaction schema.
14         /// </summary>
15         public uint nVersion = 1;
16
17         /// <summary>
18         /// Transaction timestamp.
19         /// </summary>
20         public uint nTime = 0;
21
22         /// <summary>
23         /// Array of transaction inputs
24         /// </summary>
25         public CTxIn[] vin;
26
27         /// <summary>
28         /// Array of transaction outputs
29         /// </summary>
30         public CTxOut[] vout;
31
32         /// <summary>
33         /// Block height or timestamp when transaction is final
34         /// </summary>
35         public uint nLockTime = 0;
36
37         /// <summary>
38         /// Initialize an empty instance
39         /// </summary>
40         public CTransaction()
41         {
42             // Initialize empty input and output arrays. Please note that such 
43             // configuration is not valid for real transaction, you have to supply 
44             // at least one input and one output.
45             vin = new CTxIn[0];
46             vout = new CTxOut[0];
47         }
48
49         /// <summary>
50         /// Initialize new instance as a copy of another transaction
51         /// </summary>
52         /// <param name="tx">Transaction to copy from</param>
53         public CTransaction(CTransaction tx)
54         {
55             nVersion = tx.nVersion;
56             nTime = tx.nTime;
57
58             vin = new CTxIn[tx.vin.Length];
59
60             for (int i = 0; i < vin.Length; i++)
61             {
62                 vin[i] = new CTxIn(tx.vin[i]);
63             }
64
65             vout = new CTxOut[tx.vout.Length];
66
67             for (int i = 0; i < vout.Length; i++)
68             {
69                 vout[i] = new CTxOut(tx.vout[i]);
70             }
71
72             nLockTime = tx.nLockTime;
73         }
74
75
76         /// <summary>
77         /// Parse byte sequence and initialize new instance of CTransaction
78         /// </summary>
79         /// <param name="txBytes">Byte sequence</param>
80                 public CTransaction(IList<byte> txBytes)
81         {
82             WrappedList<byte> wBytes = new WrappedList<byte>(txBytes);
83
84             nVersion = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
85             nTime = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
86
87             int nInputs = (int)VarInt.ReadVarInt(ref wBytes);
88             vin = new CTxIn[nInputs];
89
90             for (int nCurrentInput = 0; nCurrentInput < nInputs; nCurrentInput++)
91             {
92                 // Fill inputs array
93                 vin[nCurrentInput] = new CTxIn();
94
95                 vin[nCurrentInput].prevout = new COutPoint(wBytes.GetItems(36));
96
97                 int nScriptSigLen = (int)VarInt.ReadVarInt(ref wBytes);
98                 vin[nCurrentInput].scriptSig = new CScript(wBytes.GetItems(nScriptSigLen));
99                 vin[nCurrentInput].nSequence = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
100             }
101
102             int nOutputs = (int)VarInt.ReadVarInt(ref wBytes);
103             vout = new CTxOut[nOutputs];
104
105             for (int nCurrentOutput = 0; nCurrentOutput < nOutputs; nCurrentOutput++)
106             {
107                 // Fill outputs array
108                 vout[nCurrentOutput] = new CTxOut();
109                 vout[nCurrentOutput].nValue = BitConverter.ToInt64(wBytes.GetItems(8), 0);
110
111                 int nScriptPKLen = (int)VarInt.ReadVarInt(ref wBytes);
112                 vout[nCurrentOutput].scriptPubKey = new CScript(wBytes.GetItems(nScriptPKLen));
113             }
114
115             nLockTime = BitConverter.ToUInt32(wBytes.GetItems(4), 0);
116         }
117
118         /// <summary>
119         /// Read transactions array which is encoded in the block body.
120         /// </summary>
121         /// <param name="wTxBytes">Bytes sequence</param>
122         /// <returns>Transactions array</returns>
123         public static CTransaction[] ReadTransactionsList(ref WrappedList<byte> wTxBytes)
124         {
125             CTransaction[] tx;
126
127             // Read amount of transactions
128             int nTransactions = (int)VarInt.ReadVarInt(ref wTxBytes);
129             tx = new CTransaction[nTransactions];
130
131             for (int nTx = 0; nTx < nTransactions; nTx++)
132             {
133                 // Fill the transactions array
134                 tx[nTx] = new CTransaction();
135
136                 tx[nTx].nVersion = BitConverter.ToUInt32(wTxBytes.GetItems(4), 0);
137                 tx[nTx].nTime = BitConverter.ToUInt32(wTxBytes.GetItems(4), 0);
138
139                 // Inputs array
140                 tx[nTx].vin = CTxIn.ReadTxInList(ref wTxBytes);
141
142                 // outputs array
143                 tx[nTx].vout = CTxOut.ReadTxOutList(ref wTxBytes);
144
145                 tx[nTx].nLockTime = BitConverter.ToUInt32(wTxBytes.GetItems(4), 0);
146             }
147
148             return tx;
149         }
150
151         public bool IsCoinBase
152         {
153             get { return (vin.Length == 1 && vin[0].prevout.IsNull && vout.Length >= 1); }
154         }
155
156         public bool IsCoinStake
157         {
158             get
159             {
160                 return (vin.Length > 0 && (!vin[0].prevout.IsNull) && vout.Length >= 2 && vout[0].IsEmpty);
161             }
162         }
163
164
165         public IList<byte> Bytes
166         {
167             get
168             {
169                 List<byte> resultBytes = new List<byte>();
170
171                 // Typical transaction example:
172                 //
173                 // 01000000 -- version
174                 // 78b4c953 -- timestamp
175                 // 06       -- amount of txins
176                 // 340d96b77ec4ee9d42b31cadc2fab911e48d48c36274d516f226d5e85bbc512c -- txin hash
177                 // 01000000 -- txin outnumber
178                 // 6b       -- txin scriptSig length
179                 // 483045022100c8df1fc17b6ea1355a39b92146ec67b3b53565e636e028010d3a8a87f6f805f202203888b9b74df03c3960773f2a81b2dfd1efb08bb036a8f3600bd24d5ed694cd5a0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
180                 // ffffffff -- txin nSequence
181                 // 364c640420de8fa77313475970bf09ce4d0b1f8eabb8f1d6ea49d90c85b202ee -- txin hash
182                 // 01000000 -- txin outnumber
183                 // 6b       -- txin scriptSig length
184                 // 483045022100b651bf3a6835d714d2c990c742136d769258d0170c9aac24803b986050a8655b0220623651077ff14b0a9d61e30e30f2c15352f70491096f0ec655ae1c79a44e53aa0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
185                 // ffffffff -- txin nSequence
186                 // 7adbd5f2e521f567bfea2cb63e65d55e66c83563fe253464b75184a5e462043d -- txin hash
187                 // 00000000 -- txin outnumber
188                 // 6a       -- txin scriptSig length
189                 // 4730440220183609f2b995993acc9df241aff722d48b9a731b0cd376212934565723ed81f00220737e7ce75ef39bdc061d0dcdba3ee24e43b899696a7c96803cee0a79e1f78ecb0121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
190                 // ffffffff -- txin nSequence
191                 // 999eb03e00a41c2f9fde8865a554ceebbc48d30f4c8ba22dd88da8c9b46fa920 -- txin hash
192                 // 03000000 -- txin outnumber
193                 // 6b       -- txin scriptSig length
194                 // 483045022100ec1ab104ef086ba79b0f2611ebf1bfdd22a7a1020f6630fa1c6707546626e0db022056093d4048a999392185ccc735ef736a5497bd68f60b42e6c0c93ba770b54d010121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
195                 // ffffffff -- txin nSequence
196                 // c0543b86be257ddd85b014a76718a70fab9eaa3c477460e4ca187094d86f369c -- txin hash
197                 // 05000000 -- txin outnumber
198                 // 69       -- txin scriptSig length
199                 // 463043021f24275c72f952043174daf01d7f713f878625f0522124a3cab48a0a2e12604202201b47742e6697b0ebdd1e4ba49c74baf142a0228ad0e0ee847488994c9dce78470121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
200                 // ffffffff -- txin nSequence
201                 // e1793d4519147782293dd1db6d90e461265d91db2cc6889c37209394d42ad10d -- txin hash
202                 // 05000000 -- txin outnumber
203                 // 6a       -- txin scriptSig length
204                 // 473044022018a0c3d73b2765d75380614ab36ee8e3c937080894a19166128b1e3357b208fb0220233c9609985f535547381431526867ad0255ec4969afe5c360544992ed6b3ed60121030dd13e6d3c63fa10cc0b6bf968fbbfcb9a988b333813b1f22d04fa60e344bc4c -- txin scriptSig
205                 // ffffffff -- txin nSequence
206                 // 02 -- amount of txouts
207                 // e542000000000000 -- txout value
208                 // 19 -- scriptPubKey length
209                 // 76a91457d84c814b14bd86bf32f106b733baa693db7dc788ac -- scriptPubKey
210                 // 409c000000000000 -- txout value
211                 // 19 -- scriptPubKey length
212                 // 76a91408c8768d5d6bf7c1d9609da4e766c3f1752247b188ac -- scriptPubKey
213                 // 00000000 -- lock time
214
215                 resultBytes.AddRange(BitConverter.GetBytes(nVersion));
216                 resultBytes.AddRange(BitConverter.GetBytes(nTime));
217                 resultBytes.AddRange(VarInt.EncodeVarInt(vin.LongLength));
218
219                 foreach (CTxIn input in vin)
220                 {
221                     resultBytes.AddRange(input.Bytes);
222                 }
223
224                 resultBytes.AddRange(VarInt.EncodeVarInt(vout.LongLength));
225
226                 foreach (CTxOut output in vout)
227                 {
228                     resultBytes.AddRange(output.Bytes);
229                 }
230
231                 resultBytes.AddRange(BitConverter.GetBytes(nLockTime));
232
233                 return resultBytes;
234             }
235         }
236
237         public override string ToString()
238         {
239             StringBuilder sb = new StringBuilder();
240
241             sb.AppendFormat("CTransaction(\n nVersion={0},\n nTime={1},\n", nVersion, nTime);
242
243             foreach (CTxIn txin in vin)
244             {
245                 sb.AppendFormat(" {0},\n", txin.ToString());
246             }
247
248             foreach (CTxOut txout in vout)
249             {
250                 sb.AppendFormat(" {0},\n", txout.ToString());
251             }
252
253             sb.AppendFormat("\nnLockTime={0}\n)", nLockTime);
254
255             return sb.ToString();
256         }
257         }
258 }